TACO ZONE CONTROLS WIRING GUIDE Pages Switching Relays – Single Zone Wiring

2 – 12

Switching Relays – NON EXP Connected Together with Priority

3 – 19

Switching Relays – EXP Connected Together with Priority

10 – 11

Switching Relays – Multiple Indirect Hot Water Heaters

12 – 13

Switching Relays – EXP Connected To Reset Controls (PC700, 702 & 705)

14 – 21

Zone Valve Controls – NON EXP Connected Together with Priority

22 – 27

Zone Valve Controls – EXP Connected Together with Priority

28 – 31

Zone Valve Controls – Connected To Reset Controls (PC700, 702 & 705)

32 – 39

Hydro Air Fan Controls (HAFC 101 & 201)

40 – 44

Specialty Thermostat and Zone Valve Wiring

45 – 50

Instruction Sheets

51 – 60

Low Water Cutoff and Industrial Flow Switch

61 – 69

Aquastat Wiring

70 – 74

Standard Terms and Definitions Cross Reference

– 75 76 – 77

Do it once. Do it right. © Taco Catalog No. 100-9.0

Effective Date: May 1, 2003 Supersedes Date: August 1, 2001

TACO Product Information Switching Relays Product No. SR501 SR501-845RP SR502 SR503 SR504 SR506

Description 1 Zone Switching Relay 1 Zone Switching Relay Replacement PC Board for Honeywell R845, RA89A, RA832 or Comparable Relay 2 Zone Switching Relay with Priority 3 Zone Switching Relay with Priority 4 Zone Switching Relay with Priority 6 Zone Switching Relay with Priority

Switching Relays with PowerPort Options and Expandable to 20 Zones Product No. Description SR503-EXP 3 Zone Switching Relay with Priority and 3 PowerPorts SR504-EXP 4 Zone Switching Relay with Priority and 3 PowerPorts SR506-EXP 6 Zone Switching Relay with Priority and 3 PowerPorts Zone Valve Controls Product No. ZVC403 ZVC404 ZVC405 ZVC406

Description 3 Zone Valve 4 Zone Valve 5 Zone Valve 6 Zone Valve

Control Control with Priority Control Control with Priority

Zone Valve Controls with PowerPort Options and Expandable to 20 Zones Product No. Description ZVC404-EXP 4 Zone Valve Control with Priority and 2 PowerPorts ZVC406-EXP 6 Zone Valve Control with Priority and 2 PowerPorts Plug-In PowerPort Cards (For use with all -EXP controls) Product No. Description PC600 Post Purge Timer Plug-In Card PC605 Priority Protection Plug-In Card PC610 Universal Timer/Pump Exercise Plug-In Card Add-On Power Controls (For use with all -EXP controls) Product No. Description PC700 Boiler Reset Control PC702 2-Stage Boiler Reset Control PC705 Variable Speed Pump Injection Mixing Control Fan Controls Product No. HAFC101 HAFC201

Description Hydro Air Fan Control Hydro Air Fan Control with Optional Time Delays

Do it once. Do it right.

2

SR501 Switching Relay Wiring

TYPICAL WIRING (COLD START)

SR501 1 ZONE SWITCHING RELAY

ALTERNATIVE WIRING (TANKLESS COIL)

ALTERNATIVE WIRING (24 VAC POWERED INPUT SIGNAL)

THERMOSTAT

THERMOSTAT

T

T

SR501 1 ZONE SWITCHING RELAY

R W T T COM 24 VAC

24 VAC SIGNAL

SR501 1 ZONE SWITCHING RELAY

24 R W VAC T T COM

24 R W VAC T T COM

POWER

POWER

POWER *

T STAT

T STAT

T STAT *

120 VAC INPUT

120 VAC INPUT

4 4 6 6 5 N H 3 N/O N/C N/C N/O

4 4 6 6 5 N H 3 N/O N/C N/C N/O

JUMPER

4 4 6 6 5 N H 3 N/O N/C N/C N/O

JUMPER

TO: TT ON BOILER

TO: ZC

TO: TT ON BOILER

H

TO: ZR

TO: 120 VAC POWER

N CIRCULATOR TO: 120 VAC POWER

CIRCULATOR

CIRCULATOR TO: 120 VAC POWER

REMOVE JUMPER. DO NOT CONNECT POWER TO N AND H TERMINALS.

* T STAT LIGHT WILL GO ON AND OFF WITH 24 VAC SIGNAL. POWER LIGHT WILL ALWAYS BE OFF.

SR502/503 Switching Relay Controlling Another SR502/503 Switching Relay AQUASTAT ON DHW HEATER

A

T

T

ZONE1

ZONE2

ZONE3

MASTER 24 VAC POWER

PRIORITY ON VIA JUMPER PLACEMENT

SR 503

THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP

POWER ZONE 1 ZONE 2 ZONE 3

N P ZC H

X2 X1 ZR ZONE1 ZONE2

ZONE3

JUMPER

120 VOLT CIRCULATORS

N 120 VAC POWER

H

DHW HEATER CIRCULATOR

T

T

T

ZONE1

ZONE2

ZONE3

PRIORITY OFF VIA JUMPER PLACEMENT

SLAVE 24 VAC POWER

SR 503

THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP

N P ZC H

POWER ZONE 1 ZONE 2 ZONE 3

X2 X1 ZR ZONE1 ZONE2

ZONE3

JUMPER

BOILER 120 VOLT CIRCULATORS TO: "TT" ON AQUASTAT CONTROL

3

SR502/503 Switching Relay Controlling Another SR504/506 Switching Relay

AQUASTAT ON DHW HEATER

T

A

T

MASTER PRIORITY ON VIA JUMPER PLACEMENT

24 VAC POWER

SR 503

ZONE1

ZONE2

ZONE3

THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP

POWER ZONE 1 ZONE 2 ZONE 3

N P ZC H

X2 X1 ZR ZONE1 ZONE2

ZONE3

JUMPERS

120 VOLT CIRCULATORS

THERMOSTATS

T

SLAVE SR 506

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

ZONE 6 PRIORITY ON

SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

120V RELAY

24 VAC POWER

X

X

END SWITCH

PRIORITY OFF

OFF

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6

ZC ZR

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

120 VOLT CIRCULATORS

POWER INPUT

FUSE 1 AMP

REMOVE JUMPER

TO: "TT" ON BOILER

BOILER

4

120 VAC INPUT

H N

Two SR504/506 Switching Relays Connected Together AQUASTAT ON DHW HEATER

A T

T

T ZONE 4 PRIORITY ON OFF

SR 504

PRIORITY ON

ZONE 1 ZONE 2 ZONE 3 ZONE 4

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120V RELAY

24 VAC POWER

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER INPUT

120 VOLT CIRCULATORS

FUSE 1 AMP

120 VAC INPUT

JUMPER

DHW HEATER CIRCULATOR

T

BOILER

SR 504

T

T ZONE 4 PRIORITY ON OFF

PRIORITY ON

ZONE 1 ZONE 2 ZONE 3 ZONE 4

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120V RELAY

24 VAC POWER

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

H 120 VAC INPUT

JUMPER

N

TO: "TT" ON BOILER OUTPUT NOT USED

5

Priority Zoning Circulator Controlling SR504/506 Switching Relay

MASTER PRIORITY ON

PRIORITY ZONING CIRCULATOR PRIORITY OFF THERMOSTAT 2 1

BOILER 4 3

ON

PRIORITY POWER IN PR-IN PR-OUT LIVE NEUT

120 VAC INPUT

A AQUASTAT ON DHW HEATER

THERMOSTATS

T

PRIORITY OFF

SLAVE

SR 506

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

ZONE 6 PRIORITY ON

SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

120V RELAY

24 VAC POWER

X

X

END SWITCH

OFF

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6

ZC ZR

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

120 VOLT CIRCULATORS

POWER INPUT

FUSE 1 AMP

REMOVE JUMPER

TO: "TT" ON BOILER

BOILER

6

120 VAC INPUT

H N

Priority Zoning Circulator Controlling 2 SR504/506 Switching Relays MASTER

PRIORITY ZONING CIRCULATOR PRIORITY OFF

THERMOSTAT 2 1

T

A

T

T

T

T

SLAVE ZONE 4 PRIORITY ON OFF

SR 504

PRIORITY POWER IN PR-IN PR-OUT LIVE NEUT

120 VAC INPUT

AQUASTAT ON DHW HEATER

SLAVE

BOILER 4

3

PRIORITY ON

ON

T

T

T

ZONE 4 PRIORITY ON OFF

PRIORITY OFF

SR 504

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 1 ZONE 2 ZONE 3 ZONE 4

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120V RELAY

120V RELAY

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE4 POWER INPUT

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

FUSE 1 AMP

REMOVE JUMPER

BOILER

ZONE3

120 VOLT CIRCULATORS

24 VAC POWER

24 VAC POWER

X

PRIORITY OFF

REMOVE JUMPER

TO: "TT" ON BOILER

H N 120 VAC INPUT

7

8

SR502/503 Switching Relay Controlling 2 SR504/506 Switching Relays AQUASTAT ON DHW HEATER

A

T

T

MASTER PRIORITY ON

24 VAC POWER

SR 503

ZONE1

ZONE2

ZONE3

TWO ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP

POWER ZONE 1 ZONE 2 ZONE 3

N P ZC H

X2 X1 ZR ZONE1 ZONE2

ZONE3

JUMPER

T

SLAVE

T

T

T

ZONE 4 PRIORITY ON OFF

SR 504

T

SLAVE

T

T

T

ZONE 4 PRIORITY ON OFF

PRIORITY OFF

SR 504

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 1 ZONE 2 ZONE 3 ZONE 4

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120V RELAY

120V RELAY

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE4 POWER INPUT

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

FUSE 1 AMP

REMOVE JUMPER

BOILER

ZONE3

120 VOLT CIRCULATORS

24 VAC POWER

24 VAC POWER

X

PRIORITY OFF

REMOVE JUMPER

TO: "TT" ON BOILER

H N 120 VAC INPUT

SR501 Switching Relay Controlling 2 SR504/506 Switching Relays AQUASTAT ON

A

MASTER

DHW HEATER

24 R W VAC COM T T

SR501

1 ZONE SWITCHING RELAY

POWER T STAT

4 4 5 5 6 N H 3 N/O N/C N/C N/O

JUMPER

120 VAC INPUT

DHW CIRCULATOR

T

SLAVE

T

T

T

ZONE 4 PRIORITY ON OFF

SR 504

T

SLAVE

PRIORITY OFF

SR 504

ZONE 1 ZONE 2 ZONE 3 ZONE 4

T

T

T

PRIORITY OFF ZONE 4 PRIORITY ON OFF

ZONE 1 ZONE 2 ZONE 3 ZONE 4

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC POWER

120V RELAY

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

X

ZONE4 POWER

120 VOLT CIRCULATORS

X

ZC ZR END SWITCH

INPUT

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

FUSE 1 AMP

REMOVE JUMPER

BOILER

120V RELAY

120 VAC POWER

REMOVE JUMPER

TO: "TT" ON BOILER

H N

9

120 VAC INPUT

2 Expandable Switching Relays Connected Together

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

THERMOSTATS

T

SLAVE SLAVE

PLUG-IN CARDS MASTER

EXPANSION

POWER CONTROL INTERFACE

ZONE 4 PRIORITY ON OFF

1 2 3 4

ZONE 1 ZONE 2 ZONE 3 ZONE 4

SR504-EXP FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

RESET NORMAL

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC

120V RELAY

SR 504-EXP

POWER

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

120 VAC INPUT

JUMPER

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On THERMOSTATS

T

MASTER PLUG-IN CARDS

SLAVE

POWER CONTROL INTERFACE

A

MASTER

1 2 3 4

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

EXPANSION

RESET

24 VAC

NORMAL

AQUASTAT ON DHW HEATER

ZONE 6 PRIORITY ON OFF

SR 506-EXP SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6

120V RELAY

POWER

X

X

END SWITCH

ZC ZR

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

120 VOLT CIRCULATORS

POWER INPUT

FUSE 1 AMP

H JUMPER

N

TO: "TT" ON BOILER

BOILER

10

120 VAC INPUT

DHW CIRCULATOR

3 Expandable Switching Relays Connected Together SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On SLAVE

PLUG-IN CARDS 1 2 3 4

MASTER POWER CONTROL INTERFACE

AQUASTAT ON DHW HEATER

A

T

EXPANSION

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 4 PRIORITY ON OFF

MASTER

SR504-EXP RESET NORMAL

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC

120V RELAY

SR 504-EXP

POWER

X

X

END SWITCH

ZC ZR

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

120 VAC INPUT

JUMPER

TO: "TT" ON BOILER

BOILER

DHW CIRCULATOR

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

SWITCH SETTINGS

T

SLAVE SLAVE

PLUG-IN CARDS 1 2 3 4

MASTER POWER CONTROL INTERFACE

EXPANSION

ZONE 1 ZONE 2 ZONE 3 ZONE 4

T

Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

ZONE 4 PRIORITY ON OFF

PLUG-IN CARDS

SLAVE

POWER CONTROL INTERFACE

MASTER

1 2 3 4

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

EXPANSION

SR504-EXP RESET NORMAL

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

RESET

NORMAL

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC POWER

120V RELAY

X

24 VAC POWER

SR 504-EXP

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

X

X

END SWITCH

INPUT

FUSE 1 AMP

ZC ZR

ZONE 6 PRIORITY ON OFF

SR 506-EXP SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6

120V RELAY

ZONE4 POWER

120 VOLT CIRCULATORS

SLAVE

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

120 VOLT CIRCULATORS

POWER INPUT

FUSE 1 AMP

H

JUMPER

JUMPER 120 VAC INPUT

11

120 VAC INPUT

N

12

2 Indirect Water Heaters with Priority Connected to Standard Switching Relays AQUASTATS ON DHW HEATERS

MASTER

A

A PRIORITY OFF

24 VAC POWER

SR 502

ZONE1

ZONE2

ZONE3

TWO ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP

POWER ZONE 1 ZONE 2

N P ZC H

X2 X1 ZR ZONE1 ZONE2

ZONE3

JUMPERS

T

SLAVE

SR 504

T

T

T

SLAVE ZONE 4 PRIORITY ON OFF

T

T ZONE 4 PRIORITY ON OFF

PRIORITY ON

SR 504

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 1 ZONE 2 ZONE 3 ZONE 4

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC

PRIORITY ON

24 V AC

120V RELAY

120V RELAY

POWER

POWER

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

X

ZC ZR END SWITCH

INPUT

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

FUSE 1 AMP

JUMPER

BOILER

X

ZONE4 POWER

120 VOLT CIRCULATORS

ZONE NOT USED

JUMPER ZONE NOT USED

TO: "TT" ON BOILER

H N 120 VAC INPUT

2 Indirect Water Heaters with Priority Connected to EXP Switching Relays A

AQUASTATS ON DHW HEATERS

A

PRIORITY OFF

24 VAC POWER

SR 502

ZONE1

ZONE2

ZONE3

TWO ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP

POWER ZONE 1 ZONE 2

N P ZC H

X2 X1 ZR ZONE1 ZONE2

JUMPERS

ZONE3

DHW CIRCULATORS

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On

T

T

MASTER SLAVE

PLUG-IN CARDS 1 2 3 4

MASTER POWER CONTROL INTERFACE

EXPANSION

ZONE 1 ZONE 2 ZONE 3 ZONE 4

SLAVE SLAVE

ZONE 4 PRIORITY ON OFF

MASTER POWER CONTROL INTERFACE

SR504-EXP RESET NORMAL

PLUG-IN CARDS

1 2 3 4

ZONE 1 ZONE 2 ZONE 3 ZONE 4

EXPANSION

ZONE 4 PRIORITY ON OFF

SR504-EXP

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

RESET NORMAL

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC POWER

120V RELAY

X

X

END SWITCH

SR 504-EXP ZC ZR

ZONE1 ZONE2

ZONE3

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC

120V RELAY

120 VOLT CIRCULATORS

FUSE 1 AMP

SR 504-EXP

POWER

X

ZONE4 POWER

X

END SWITCH

INPUT

ZC ZR

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

JUMPER

JUMPER

TO: "TT" ON BOILER

BOILER

13

ZONE NOT USED

H 120 VAC INPUT

N

14

PC700 Boiler Reset Control Connected to EXP Switching Relay

OUTDOOR SENSOR

SWITCH SETTINGS

THERMOSTATS

Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off

PC700 SLAVE BOIL OUT SEN SEN

ZONE CONTROL

1234

PLUG-IN CARDS

MASTER POWER CONTROL INTERFACE

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 4 PRIORITY ON OFF

SR 504-EXP

BOILER SENSOR

RESET NORMAL

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC POWER

120V RELAY

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP H

JUMPER TO: "TT" ON BOILER

BOILER

120 VAC INPUT N

PC702 2–Stage Boiler Reset Control Connected to EXP Switching Relay OUTDOOR SENSOR

DHW DEMAND

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off

PC702

THERMOSTATS

T

STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL

SLAVE

1234

BOILER SENSOR

PLUG-IN CARDS

MASTER POWER CONTROL INTERFACE

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 4 PRIORITY ON OFF

SR 504-EXP RESET NORMAL

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC POWER

120V RELAY

X

BOILER #1

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP H

JUMPER

120 VAC INPUT N

BOILER #2

15

WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW

SYSTEM CIRCULATOR (OPTIONAL)

16

PC705 Variable Speed Pump Injection Control Connected to EXP Switching Relay

SWITCH SETTINGS OUTDOOR SENSOR

(SEE NOTE B) RED

BLUE

SYSTEM CIRCULATOR AND/OR BOILER

SLAVE

ZONE CONTROL

BLACK

1234

T PLUG-IN CARDS

MASTER

PC705-2 BOIL SUP OUT SEN SEN SEN

THERMOSTATS

Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off

GREEN/GROUND

ZONE 1 ZONE 2 ZONE 3 ZONE 4

INJECTION CIRCULATOR

ZONE 4 PRIORITY ON OFF

SR 504-EXP RESET NORMAL

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

SUPPLY SENSOR BOILER SENSOR

24 VAC POWER

120V RELAY

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

JUMPER TO: "TT" ON BOILER

BOILER

SYSTEM CIRCULATOR AND/OR BOILER (SEE NOTE A)

N

120 VAC INPUT NOTE A: WHEN SYSTEM CIRCULATOR IS CONNECTED TO ZR TERMINAL ON SWITCHING RELAY, THE MODE SWITCH MUST BE SET TO NORMAL. THE PC705-2 WILL NOT RESET THE BOILER WHEN IN THE NORMAL MODE. NOTE B: WHEN SYSTEM CIRCULATOR IS CONNECTED TO RED WIRE ON PC705-2, THE CIRCULATOR WILL OPERATE ONLY WHEN THERMOSTAT CALLS FOR HEAT AND THE OUTDOOR TEMPERATURE IS BELOW THE WARM WEATHER SHUT DOWN (WWSD) TEMPERATURE. THE WWSD CAN BE ADJUSTED OR TURNED OFF SO THAT THE CIRCULATOR IS NOT AFFECTED BY OUTDOOR TEMPERATURE.

H

PC700 Boiler Reset Control Connected to 2 EXP Switching Relays

OUTDOOR SENSOR

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off

PC700

T

SLAVE

MASTER

PLUG-IN CARDS

ZONE 4 PRIORITY ON OFF

1 2 3 4

MASTER

ZONE CONTROL

BOIL OUT SEN SEN

THERMOSTATS

EXPANSION

POWER CONTROL INTERFACE

ZONE 1 ZONE 2 ZONE 3 ZONE 4

SR 504-EXP

BOILER SENSOR

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

RESET NORMAL

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC

120V RELAY

POWER

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

TO: "TT" ON BOILER

JUMPER 120 VAC INPUT

BOILER

SWITCH SETTINGS THERMOSTATS

Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority

T SLAVE

SLAVE

PLUG-IN CARDS MASTER

POWER CONTROL INTERFACE

1 2 3 4 EXPANSION

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 4 PRIORITY ON OFF

SR 504-EXP RESET NORMAL

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

120V RELAY

24 VAC POWER

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

H

JUMPER

N 120 VAC INPUT

SYSTEM CIRCULATOR (OPTIONAL)

17

PC702 2–Stage Boiler Reset Control Connected to 2 EXP Switching Relays

OUTDOOR SENSOR

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off

DHW DEMAND

THERMOSTATS

T MASTER

PC702

SLAVE

STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL

PLUG-IN CARDS

ZONE 4 PRIORITY ON OFF

1 2 3 4

MASTER

EXPANSION

POWER CONTROL INTERFACE

ZONE 1 ZONE 2 ZONE 3 ZONE 4

SR 504-EXP

BOILER SENSOR

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

RESET NORMAL

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC

120V RELAY

POWER

X

BOILER #1

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

120 VAC INPUT

JUMPER

BOILER #2

WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority

THERMOSTATS

T

SLAVE MASTER POWER CONTROL INTERFACE

SLAVE

PLUG-IN CARDS 1 2 3 4 EXPANSION

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 4 PRIORITY ON OFF

SR 504-EXP RESET NORMAL

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC POWER

120V RELAY

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

H JUMPER

N 120 VAC INPUT

SYSTEM CIRCULATOR (OPTIONAL)

18

PC705 Variable Speed Pump Injection Control Connected to 2 EXP Switching Relays

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off OUTDOOR SENSOR

THERMOSTATS

T MASTER

GREEN/GROUND (SEE NOTE B ON PAGE 16)

SLAVE

PLUG-IN CARDS 1 2 3 4

MASTER

RED

EXPANSION

ZONE 1 ZONE 2 ZONE 3 ZONE 4

SYSTEM CIRCULATOR

BLUE

SR 504-EXP

PC705-2

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

RESET NORMAL BOIL SUP OUT SEN SEN SEN

ZONE CONTROL

BLACK

ZONE 4 PRIORITY ON OFF

INJECTION CIRCULATOR

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

SUPPLY SENSOR

24 VAC BOILER SENSOR

120V RELAY

POWER

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER INPUT

120 VOLT CIRCULATORS

FUSE 1 AMP

JUMPER TO: "TT" ON BOILER

120 VAC INPUT

BOILER

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority

THERMOSTATS

T SLAVE

SLAVE

PLUG-IN CARDS MASTER

POWER CONTROL INTERFACE

1 2 3 4 EXPANSION

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 4 PRIORITY ON OFF

SR 504-EXP RESET NORMAL

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC POWER

120V RELAY

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

H JUMPER

N 120 VAC INPUT

SYSTEM CIRCULATOR (OPTIONAL) (SEE NOTE A ON PAGE 16)

19

PC700 and PC705 Controls Connected to 2 EXP Switching Relays OUTDOOR SENSOR

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off

THERMOSTATS

T MASTER

SLAVE

PC700

1 2 3 4

MASTER

ZONE CONTROL

BOIL OUT SEN SEN

PLUG-IN CARDS

EXPANSION

POWER CONTROL INTERFACE

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 4 PRIORITY ON OFF

SR 504-EXP

BOILER SENSOR

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

RESET NORMAL

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC

120V RELAY

POWER

X

X

ZONE1 ZONE2

ZC ZR END SWITCH

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

120 V AC INPUT

JUMPER

TO: "TT" ON BOILER

BOILER

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority OUTDOOR SENSOR

THERMOSTATS

GREEN/GROUND

T

(SEE NOTE B ON PAGE 16)

SLAVE

RED

BLUE

SYSTEM CIRCULATOR

PC705-2 BOIL SUP OUT SEN SEN SEN

ZONE CONTROL

BLACK

SLAVE

PLUG-IN CARDS MASTER

1 2 3 4 EXPANSION

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 4 PRIORITY ON OFF

SR 504-EXP

INJECTION CIRCULATOR

RESET NORMAL

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

SUPPLY SENSOR BOILER SENSOR

24 VAC POWER

120V RELAY

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP JUMPER

SYSTEM CIRCULATOR (OPTIONAL LOCATION) (SEE NOTE A ON PAGE 16)

H N 120 VAC INPUT

20

PC702 and PC705 Controls Connected to 2 EXP Switching Relays SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off

OUTDOOR SENSOR

THERMOSTATS

T MASTER

DHW DEMAND

SLAVE

PC702

PLUG-IN CARDS 1 2 3 4

MASTER

EXPANSION

POWER CONTROL INTERFACE

STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL

ZONE 1 ZONE 2 ZONE 3 ZONE 4

ZONE 4 PRIORITY ON OFF

SR 504-EXP FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

RESET NORMAL BOILER SENSOR

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC

120V RELAY

POWER

X

X

ZONE1 ZONE2

ZC ZR END SWITCH

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

BOILER #1

FUSE 1 AMP

120 VAC INPUT

JUMPER

BOILER #2 WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority OUTDOOR SENSOR

THERMOSTATS

T

GREEN/GROUND (SEE NOTE B ON PAGE 16)

SLAVE SLAVE

PLUG-IN CARDS

RED

BLUE

SYSTEM CIRCULATOR

MASTER

1 2 3 4 EXPANSION

ZONE 1 ZONE 2 ZONE 3 ZONE 4

PC705-2 BOIL SUP OUT SEN SEN SEN

ZONE CONTROL

BLACK

ZONE 4 PRIORITY ON OFF

SR 504-EXP

INJECTION CIRCULATOR

RESET NORMAL

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

SUPPLY SENSOR BOILER SENSOR

24 VAC POWER

120V RELAY

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP JUMPER

SYSTEM CIRCULATOR (OPTIONAL LOCATION) (SEE NOTE A ON PAGE 16)

H N 120 VAC INPUT

21

N

120 VAC INPUT BLACK

THERMOSTAT

THERMOSTAT

THERMOSTAT

T

T

T

24 VAC

24 VAC

WHITE

T T ZONE 1 FUSE (5 AMP MAX)

120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

POWER IN

H

WHITE

FACTORY INSTALLED TRANSFORMER

22

ZVC403/405 with System Pump

24 VAC

END SWITCH

N/O COM N/C

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

ZVC 405 FIVE ZONE ZONE VALVE CONTROL

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

JUMPER 3&4 TO BOILER AQUASTAT RELAY 1 2 3

BOILER SYSTEM PUMP

SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.

2 WIRE ZONE VALVE (NO END SWITCH)

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 POWER

N

THERMOSTAT

THERMOSTAT

T

T

T

AQUASTAT ON DHW HEATER

A

24 VAC

ZONE 6 PRIORITY

MODE

NORMAL RESET

OFF ON

T T ZONE 1 FUSE (7 AMP MAX)

FACTORY INSTALLED TRANSFORMER

WHITE 120 VAC INPUT BLACK

THERMOSTAT

24 VAC

POWER IN

H

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

ZVC404/406 with System Pump

24 VAC

EXTRA MAIN END END SWITCH SWITCH

N/O COM N/C ZONE 6 RELAY

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4 TO BOILER AQUASTAT RELAY DRY CONTACTS

SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.

VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER

SEE NOTE

PRIORITY ZONE 1 2 3

BOILER SYSTEM PUMP

VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4

ZVC 406

ZONE 1 1 2 3 4

T STAT 1

2 WIRE ZONE VALVE (NO END SWITCH)

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

23

N

THERMOSTAT

THERMOSTAT

T

T

T

AQUASTAT ON DHW HEATER

A

24 VAC

ZONE 6 PRIORITY

MODE

NORMAL RESET

OFF ON

T T ZONE 1 FUSE (7 AMP MAX)

FACTORY INSTALLED TRANSFORMER

WHITE 120 VAC INPUT BLACK

THERMOSTAT

24 VAC

POWER IN

H

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

24

ZVC404/406 with Domestic Hot Water (DHW) Pump

24 VAC

EXTRA MAIN END END SWITCH SWITCH

N/O COM N/C ZONE 6 RELAY

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4 TO BOILER AQUASTAT RELAY

VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4

ZVC 406

ZONE 1 1 2 3 4

T STAT 1

VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER

SEE NOTE

PRIORITY ZONE 1 2 3

BOILER DHW PUMP

BOILER TURNS ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.

2 WIRE ZONE VALVE (NO END SWITCH)

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

N

THERMOSTAT

THERMOSTAT

T

T

T

ZONE 6 PRIORITY

MODE

NORMAL RESET

OFF ON

T T ZONE 1

24 VAC

EXTRA MAIN END END SWITCH SWITCH

N/O COM N/C ZONE 6 RELAY

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4

ZVC 406

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4 TO BOILER AQUASTAT RELAY

BOILER

AQUASTAT ON DHW HEATER

A

24 VAC

FUSE (7 AMP MAX)

FACTORY INSTALLED TRANSFORMER

WHITE 120 VAC INPUT BLACK

THERMOSTAT

24 VAC

POWER IN

H

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

ZVC404/406 with System and DHW Pumps

VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER

SEE NOTE

PRIORITY ZONE 1 2 3

SYSTEM PUMP DHW PUMP

2 WIRE ZONE VALVE (NO END SWITCH)

SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

25

N

THERMOSTAT

THERMOSTAT

T

T

T

AQUASTAT ON DHW HEATER

A

24 VAC

ZONE 6 PRIORITY

MODE

NORMAL RESET

OFF ON

T T ZONE 1

T T ZONE 2

FUSE (7 AMP MAX)

FACTORY INSTALLED TRANSFORMER

WHITE 120 VAC INPUT BLACK

THERMOSTAT

24 VAC

POWER IN

H

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

26

ZVC404/406 with System, DHW and Secondary Pumps

24 VAC

EXTRA MAIN END END SWITCH SWITCH

N/O COM N/C ZONE 6 RELAY

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

TO BOILER AQUASTAT RELAY

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4

ZVC 406

ZONE 1 1 2 3 4

T STAT 1

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4

VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER

SEE NOTE

PRIORITY ZONE

BOILER

1 2 3

SYSTEM PUMP DHW PUMP

2 WIRE ZONE VALVE (NO END SWITCH)

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

SECONDARY PUMP

SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS. SECONDARY PUMP COMES ON WHEN ANY ZONE CALLS EXCEPT PRIORITY ZONE.

Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

2 ZVC404/406 Connected Together with Priority

THERMOSTAT

THERMOSTAT

THERMOSTAT

T

T

T

Note: When a circulator is used on the priority o z ne instead of a o z ne valve, jumper 3 and 4 of the priority o z ne.

H

WHITE 120 VAC INPUT BLACK

ZONE 4 PRIORITY

MODE

NORMAL RESET

24 VAC

OFF

PRIORITY ON

ON

T T ZONE 1

POWER IN

T T ZONE 2

FUSE (3 AMP MAX)

EXTRA MAIN END END SWITCH SWITCH

T T ZONE 3

T T ZONE 4

T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3

ZVC 404 FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

ZONE 1 1 2 3 4

N/O COM N/C ZONE 4 RELAY

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

VALVE 3 T STAT 4 VALVE 4 POWER ZONE 4 1 2 3 4

TO BOILER AQUASTAT RELAY JUMPER 3&4

JUMPER 3&4

SEE NOTE

PRIORITY ZONE 1 2 3

DRY CONTACTS

MOTOR

TACO 3 WIRE ZONE VALVE

2 WIRE ZONE VALVE (NO END SWITCH)

END SWITCH

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

THERMOSTAT

THERMOSTAT

THERMOSTAT

T

T

T

AQUASTAT ON DHW HEATER

A

24 VAC

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

N

FACTORY INSTALLED TRANSFORMER

24 VAC

ZONE 4 PRIORITY

MODE

NORMAL RESET

24 VAC

OFF ON

T T ZONE 1

POWER IN

FUSE (3 AMP MAX)

EXTRA MAIN END END SWITCH SWITCH

N/O COM N/C ZONE 4 RELAY

T T ZONE 2

T T ZONE 3

T T ZONE 4

ZVC 404

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

VALVE 3 T STAT 4 VALVE 4 POWER ZONE 4 1 2 3 4

JUMPER 3&4

JUMPER 3&4

T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3

FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

TO BOILER AQUASTAT RELAY

BOILER

PRIORITY ON

SEE NOTE

PRIORITY ZONE 1 2 3

DRY CONTACTS

2 WIRE ZONE VALVE (NO END SWITCH)

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

27

2 EXP Zone Valve Controls Connected Together with System Pump

Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On

T

T 24 VAC

SLAVE POWER CONTROLS

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS POWER IN

WHITE

FACTORY INSTALLED TRANSFORMER

MASTER 120 VAC INPUT BLACK

AQUASTAT ON DHW HEATER

A

T

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

ZONE 1 1 2 3 4

END SWITCH A BOILER

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

POWER ON

JUMPER 3&4

JUMPER 3&4 TO BOILER AQUASTAT RELAY

MOTOR

1 2 3

BOILER

TACO 3 WIRE ZONE VALVE

2 WIRE ZONE VALVE (NO END SWITCH)

SYSTEM PUMP

VALVE 6

END SWITCH

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

N H

120 VAC INPUT

SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

T

T

T

SLAVE POWER CONTROLS

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2 VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

DRY CONTACTS

END SWITCH A BOILER

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4 1 2 3

2 WIRE ZONE VALVE (NO END SWITCH)

28

T T ZONE 4

ZVC 406-EXP FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS POWER IN

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

SLAVE

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

VALVE 6 POWER ON

SEE NOTE

2 EXP Zone Valve Controls Connected Together with DHW Pump

Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On

T

T 24 VAC

SLAVE POWER CONTROLS

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS POWER IN

WHITE

FACTORY INSTALLED TRANSFORMER

MASTER 120 VAC INPUT BLACK

AQUASTAT ON DHW HEATER

A

T

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

ZONE 1 1 2 3 4

END SWITCH A BOILER

TO BOILER AQUASTAT RELAY

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

POWER ON

JUMPER 3&4

JUMPER 3&4 MOTOR

1 2 3

BOILER

TACO 3 WIRE ZONE VALVE

2 WIRE ZONE VALVE (NO END SWITCH)

DHW PUMP

VALVE 6

END SWITCH

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

N H

120 VAC INPUT

BOILER TURNS ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

T

T

T

SLAVE POWER CONTROLS

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS POWER IN

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

SLAVE

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

DRY CONTACTS

END SWITCH A BOILER

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4 1 2 3

2 WIRE ZONE VALVE (NO END SWITCH)

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

29

2 EXP Zone Valve Controls Connected Together with System and DHW Pumps

Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On

T

T 24 VAC

SLAVE POWER CONTROLS

1 2 3 4

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

RESET

T T ZONE 1

EXPANSION MASTER

NORMAL

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2 VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

ZONE 1 1 2 3 4

END SWITCH A BOILER

TO BOILER AQUASTAT RELAY

BOILER

T T ZONE 2

ZVC 406-EXP FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS POWER IN

WHITE

FACTORY INSTALLED TRANSFORMER

MASTER 120 VAC INPUT BLACK

AQUASTAT ON DHW HEATER

A

T

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

POWER ON

JUMPER 3&4

JUMPER 3&4 MOTOR

1 2 3

SYSTEM PUMP

DHW PUMP

VALVE 6

TACO 3 WIRE ZONE VALVE

2 WIRE ZONE VALVE (NO END SWITCH)

END SWITCH

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

N H

120 VAC INPUT

SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

T

T

T

SLAVE POWER CONTROLS

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2 VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

DRY CONTACTS

END SWITCH A BOILER

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4 1 2 3

2 WIRE ZONE VALVE (NO END SWITCH)

30

T T ZONE 4

ZVC 406-EXP FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS POWER IN

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

SLAVE

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

VALVE 6 POWER ON

SEE NOTE

2 EXP Zone Valve Controls Connected Together with System, DHW and Secondary Pumps

Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On

T

T 24 VAC

SLAVE POWER CONTROLS

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

24 VAC

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER

NORMAL

DHW PUMP

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2 VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

ZONE 1 1 2 3 4

END SWITCH A BOILER

TO BOILER AQUASTAT RELAY

BOILER

T T ZONE 2

ZVC 406-EXP FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS POWER IN

WHITE

FACTORY INSTALLED TRANSFORMER

MASTER 120 VAC INPUT BLACK

AQUASTAT ON DHW HEATER

A

T

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

MOTOR

1 2 3

SECONDARY PUMP

POWER ON

JUMPER 3&4

JUMPER 3&4

SYSTEM PUMP

VALVE 6

TACO 3 WIRE ZONE VALVE

2 WIRE ZONE VALVE (NO END SWITCH)

END SWITCH

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

N H

120 VAC INPUT

SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS. SECONDARY PUMP TURNS ON WHEN ANY ZONE CALLS, EXCEPT PRIORITY ZONE.

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

T

T

T

SLAVE POWER CONTROLS

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS POWER IN

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

SLAVE

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

DRY CONTACTS

END SWITCH A BOILER

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4 1 2 3

2 WIRE ZONE VALVE (NO END SWITCH)

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

31

32

PC700 Boiler Reset Control Connected To EXP Zone Valve Control OUTDOOR SENSOR

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

PC700

THERMOSTAT

THERMOSTAT

THERMOSTAT

T

T

T

INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT

ZONE CONTROL

BOIL OUT SEN SEN

BOILER SENSOR

24 VAC

SLAVE POWER CONTROLS

120 VAC INPUT BLACK

24 VAC

TO BOILER AQUASTAT RELAY

TACO, INC ZVC406-EXP

WHITE

FACTORY INSTALLED TRANSFORMER

MODE RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2 VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

END SWITCH A BOILER

DRY CONTACTS

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

SYSTEM CIRCULATOR

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

2 WIRE ZONE VALVE (NO END SWITCH)

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4 1 2 3

BOILER

T T ZONE 4

ZVC 406-EXP FUSE 7 AMP MAX

120 VAC INPUT BLACK

ZONE 6 PRIORITY ON

PLUG-IN CARDS POWER IN

WHITE

FACTORY INSTALLED TRANSFORMER

24 VAC

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

H N SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.

PC702 2–Stage Boiler Reset Control Connected To EXP Zone Valve Control OUTDOOR SENSOR

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off

DHW DEMAND

Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

PC702

THERMOSTAT

THERMOSTAT

THERMOSTAT

T

T

INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT

STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL

T

WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW BOILER SENSOR

BLACK

24 VAC

SLAVE POWER CONTROLS

BLACK

BOILER #1

TACO, INC ZVC406-EXP

120 VAC INPUT

24 VAC

WHITE

FACTORY INSTALLED TRANSFORMER

MODE RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

T STAT 1 VALVE 1 T STAT 2 VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

END SWITCH A BOILER

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

1 2 3

SYSTEM CIRCULATOR

DHW CIRCULATOR

2 WIRE ZONE VALVE (NO END SWITCH)

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4

BOILER #2

OFF

ZVC 406-EXP FUSE 7 AMP MAX

120 VAC INPUT

ZONE 6 PRIORITY ON

PLUG-IN CARDS POWER IN

WHITE

FACTORY INSTALLED TRANSFORMER

24 VAC

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

H N SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS.

33

34

PC705 Variable Speed Pump Injection Control Connected To EXP Zone Valve Control

OUTDOOR SENSOR

GREEN/GROUND

SYSTEM CIRCULATOR

RED

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off

(SEE NOTE B ON PAGE 16) BLUE

PC705-2 BOIL SUP OUT SEN SEN SEN

Note: When a circulator is used on the priority o z ne instead of a o z ne valve, jumper 3 and 4 of the priority o z ne.

INJECTION CIRCULATOR

THERMOSTAT

THERMOSTAT

THERMOSTAT

T

T

T

INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT

BLACK

ZONE CONTROL

SUPPLY SENSOR

24 VAC

24 VAC

SLAVE POWER CONTROLS

24 VAC

TO BOILER AQUASTAT RELAY

TACO, INC ZVC406-EXP

120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

MODE

WHITE

ZONE 6 PRIORITY ON

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

120 VAC INPUT BLACK

PLUG-IN CARDS POWER IN

WHITE

FACTORY INSTALLED TRANSFORMER

BOILER SENSOR

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

END SWITCH A BOILER

DRY CONTACTS

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

SYSTEM CIRCULATOR (OPTIONAL LOCATION)

ZONE 5 1 2 3 4

2 WIRE ZONE VALVE (NO END SWITCH)

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4 1 2 3

BOILER

ZONE 4 1 2 3 4

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

H N SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.

PC700 Boiler Reset Control Connected To 2 EXP Zone Valve Controls

OUTDOOR SENSOR

Note: When a circulator is used on the priority o z ne instead of a zone valve, jumper 3 and 4 of the priority zone.

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off

INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT

PC700 ZONE CONTROL

T

BOILER SENSOR

T

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

ZONE 6 PRIORITY ON

PLUG-IN CARDS

24 VAC

SLAVE POWER CONTROLS

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER

MODE

WHITE

T

24 VAC

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

T STAT 1

OFF

VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

MASTER POWER IN

BOIL OUT SEN SEN

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

ZONE 1 1 2 3 4

END SWITCH A BOILER

N/O COM N/C ZONE 6 RELAY

TO BOILER AQUASTAT RELAY

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

MOTOR

1 2 3

BOILER

DHW CIRCULATOR

POWER ON

JUMPER 3&4

JUMPER 3&4

SYSTEM CIRCULATOR

VALVE 6

TACO 3 WIRE ZONE VALVE

2 WIRE ZONE VALVE (NO END SWITCH)

SEE NOTE

PRIORITY ZONE

END SWITCH

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

H N

SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS.

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

T

120 VAC INPUT BLACK

T ZONE 6 PRIORITY ON

SLAVE POWER CONTROLS

MODE

24 VAC

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

WHITE

FACTORY INSTALLED TRANSFORMER

BLACK

POWER IN

120 VAC INPUT

T 24 VAC

PLUG-IN CARDS

24 VAC

TACO, INC ZVC406-EXP

WHITE

FACTORY INSTALLED TRANSFORMER

SLAVE

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

DRY CONTACTS

END SWITCH A BOILER

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

JUMPER 3&4

JUMPER 3&4 1 2 3

2 WIRE ZONE VALVE (NO END SWITCH)

ZONE 6 1 2 3 4

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

35

PC702 2–Stage Boiler Reset Control Connected To 2 EXP Zone Valve Controls

OUTDOOR SENSOR

Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off

DHW DEMAND

PC702

WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW

INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT

STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL

T

BOILER SENSOR

T

SLAVE POWER CONTROLS

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

RESET

1 2 3 4

ZONE 6 PRIORITY ON

T T ZONE 1

EXPANSION MASTER NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

24 VAC

MODE

WHITE

T

24 VAC PLUG-IN CARDS

POWER IN

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

MASTER

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

ZONE 1 1 2 3 4

END SWITCH A BOILER

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

MOTOR

1 2 3

SYSTEM CIRCULATOR

DHW CIRCULATOR

POWER ON

JUMPER 3&4

JUMPER 3&4

BOILER #1

VALVE 6

TACO 3 WIRE ZONE VALVE

2 WIRE ZONE VALVE (NO END SWITCH)

END SWITCH

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

H N

SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS. BOILER #2

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

T

T

SLAVE

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

ZONE 6 PRIORITY ON

POWER CONTROLS

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2 VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

DRY CONTACTS

END SWITCH A BOILER

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

2 WIRE ZONE VALVE (NO END SWITCH)

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4 1 2 3

36

T T ZONE 4

ZVC 406-EXP FUSE 7 AMP MAX

24 VAC

MODE

WHITE

T

24 VAC PLUG-IN CARDS

POWER IN

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

SLAVE

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

VALVE 6 POWER ON

SEE NOTE

PC705 Variable Speed Pump Injection Control Connected To 2 EXP Zone Valve Controls

OUTDOOR SENSOR

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off

GREEN/GROUND

(SEE NOTE B ON PAGE 16)

RED

SYSTEM CIRCULATOR

Note: When a circulator is used on the priority o z ne instead of a o z ne valve, jumper 3 and 4 of the priority o z ne.

BLUE

PC705-2

INJECTION CIRCULATOR

BLACK BOIL SUP OUT SEN SEN SEN

INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT

ZONE CONTROL

T

SUPPLY SENSOR

T

BLACK

24 VAC

SLAVE POWER CONTROLS

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

BLACK

24 VAC

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

WHITE 120 VAC INPUT

POWER IN

FACTORY INSTALLED TRANSFORMER

BOILER SENSOR

T

24 VAC

MASTER

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

ZONE 1 1 2 3 4

END SWITCH A BOILER

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

MOTOR

1 2 3

BOILER

TACO 3 WIRE ZONE VALVE

2 WIRE ZONE VALVE (NO END SWITCH)

SYSTEM CIRCULATOR (OPTIONAL LOCATION)

VALVE 6 POWER ON

JUMPER 3&4

JUMPER 3&4

DRY CONTACTS

TO BOILER AQUASTAT RELAY

ZONE 2 1 2 3 4

END SWITCH

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

H N

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

T

T

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

BLACK

ZONE 6 PRIORITY ON

PLUG-IN CARDS

24 VAC

SLAVE POWER CONTROLS

MODE

WHITE

T

24 VAC

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

120 VAC INPUT BLACK

POWER IN

WHITE

FACTORY INSTALLED TRANSFORMER

SLAVE

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

DRY CONTACTS

END SWITCH A BOILER

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

JUMPER 3&4

JUMPER 3&4 1 2 3

2 WIRE ZONE VALVE (NO END SWITCH)

ZONE 6 1 2 3 4

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

37

PC700 and PC705 Connected To 2 EXP Zone Valve Controls OUTDOOR SENSOR

Note: When a circulator is used on the priority o z ne instead of a zone valve, jumper 3 and 4 of the priority zone.

SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off

INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT

PC700 ZONE CONTROL

T

BOILER SENSOR

T

24 VAC

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

ZONE 6 PRIORITY ON

PLUG-IN CARDS

SLAVE POWER CONTROLS

MODE

WHITE

T

24 VAC

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

T STAT 1

OFF

VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

MASTER POWER IN

BOIL OUT SEN SEN

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

ZONE 1 1 2 3 4

END SWITCH A BOILER

N/O COM N/C ZONE 6 RELAY

TO BOILER AQUASTAT RELAY

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

POWER ON

JUMPER 3&4

JUMPER 3&4 MOTOR

1 2 3

BOILER

TACO 3 WIRE ZONE VALVE

2 WIRE ZONE VALVE (NO END SWITCH) SYSTEM CIRCULATOR

VALVE 6

SEE NOTE

PRIORITY ZONE

END SWITCH

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

DHW CIRCULATOR

H N OUTDOOR SENSOR

SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS.

GREEN/GROUND

(SEE NOTE B ON PAGE 16) SYSTEM CIRCULATOR

RED

BLUE

PC705-2 BOIL SUP OUT SEN SEN SEN

INJECTION CIRCULATOR

ZONE CONTROL

BLACK

SUPPLY SENSOR BOILER SENSOR

T

120 VAC INPUT BLACK

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

POWER IN

SLAVE POWER CONTROLS

24 VAC

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

DRY CONTACTS

END SWITCH A BOILER

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

JUMPER 3&4

JUMPER 3&4 1 2 3

2 WIRE ZONE VALVE (NO END SWITCH)

38

T ZONE 6 PRIORITY ON

T T ZONE 1

EXPANSION MASTER

MODE RESET

1 2 3 4

FUSE 7 AMP MAX

WHITE

FACTORY INSTALLED TRANSFORMER

BLACK

T 24 VAC

PLUG-IN CARDS

24 VAC

TACO, INC ZVC406-EXP

WHITE 120 VAC INPUT

FACTORY INSTALLED TRANSFORMER

SLAVE

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

VALVE 6 POWER ON

SEE NOTE

PC702 and PC705 Connected To 2 EXP Zone Valve Controls SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off

OUTDOOR SENSOR

DHW DEMAND

PC702

Note: When a circulator is used on the priority zone instead of a o z ne valve, jumper 3 and 4 of the priority o z ne.

WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW

INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT

STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL

T

BOILER SENSOR

T

SLAVE POWER CONTROLS

RESET

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

24 VAC

BOILER #1 120 VAC INPUT BLACK

ZONE 6 PRIORITY ON

1 2 3 4

T T ZONE 1

EXPANSION MASTER

NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

T STAT 1

OFF

VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

24 VAC

MODE

WHITE

T

24 VAC PLUG-IN CARDS

POWER IN

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

MASTER

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

ZONE 1 1 2 3 4

END SWITCH A BOILER

N/O COM N/C ZONE 6 RELAY

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

MOTOR

1 2 3

SYSTEM CIRCULATOR

DHW CIRCULATOR

POWER ON

JUMPER 3&4

JUMPER 3&4

BOILER #2

VALVE 6

TACO 3 WIRE ZONE VALVE

2 WIRE ZONE VALVE (NO END SWITCH)

END SWITCH

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

H N OUTDOOR SENSOR

SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS.

GREEN/GROUND

(SEE NOTE B ON PAGE 16)

RED

SYSTEM CIRCULATOR

BLUE

PC705-2

INJECTION CIRCULATOR

BLACK BOIL SUP OUT SEN SEN SEN

ZONE CONTROL

SUPPLY SENSOR BOILER SENSOR

T

T

SLAVE

SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off

24 VAC

TACO, INC ZVC406-EXP

FACTORY INSTALLED TRANSFORMER

120 VAC INPUT BLACK

ZONE 6 PRIORITY ON

POWER CONTROLS

RESET

1 2 3 4

T T ZONE 1

EXPANSION MASTER NORMAL

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2

ZVC 406-EXP

VALVE 2

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY

FUSE 7 AMP MAX

24 VAC

MODE

WHITE

T

24 VAC PLUG-IN CARDS

POWER IN

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

SLAVE

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

DRY CONTACTS

END SWITCH A BOILER

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

JUMPER 3&4

JUMPER 3&4 1 2 3

2 WIRE ZONE VALVE (NO END SWITCH)

ZONE 6 1 2 3 4

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

39

HAFC101 with 1 Speed Air Handler

THERMOSTAT

T

Optional Power Wire to Thermostat that Requires 24VAC

To: Aquastat on Return Line of Hydro Coil

C R W Y G T T THERMOSTAT

AQUASTAT

Power On Call for Heat Fan, Cooling Fan, Heating

HAFC101 HYDRO AIR FAN CONTROL

BOILER

AIR HANDLER

X X C R Y G G

LOW HIGH

Dry Contacts To: “T T” on Boiler or Switching Relay

24 VAC

Jumper

Line

Fan Relay

Outdoor Condenser Unit

M

HAFC 101 WITH 1 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.)

40

HAFC101 with 2 Speed Air Handler

THERMOSTAT

T To: Aquastat on Return Line of Hydro Coil

Optional Power Wire to Thermostat that Requires 24VAC

C R W Y G T T THERMOSTAT

AQUASTAT

Power On Call for Heat Fan, Cooling Fan, Heating

HAFC101 HYDRO AIR FAN CONTROL

BOILER

AIR HANDLER

X X C R Y G G

Line

Fan Relays

High

Low

Dry Contacts To: “T T” on Boiler or Switching Relay

24 VAC

LOW HIGH

Outdoor Condenser Unit

M

HAFC 101 WITH 2 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.)

41

HAFC201 with 1 Speed Air Handler

To: Optional Aquastat on Return Line of Hydro Coil

THERMOSTAT

T Optional Power Wire to Thermostat that Requires 24VAC

To: Optional Aquastat or Thermostat to sense low ambient temperature

C R W Y G T T T T THERMOSTAT

WATER COIL FREEZE PR AQUASTATS

Power On Call for Heat Fan, Cooling Fan, Heating

HAFC201 HYDRO AIR FAN CONTROL OFF

DRY CONTACTS 1 MIN ON DELAY - FAN 3 MIN ON DELAY - FAN 2 MIN @ 24 HR - PUMP 30 SEC @ 2 WK - PUMP

ON

NOTE: For 4 minute on delay of Heating Fan, switch 1 and 3 MIN ON DELAY to ON position.

5 AMP 1/6 HP RATED

PUMP

BOILER

AIR HANDLER

XX X X C R Y G G

LOW HIGH Jumper

Hot Neutral 24 VAC

(or to “T T” on switching relay)

Fan Relay

Dry Contacts To: “T T” on Boiler or Switching Relay

Line

Circulator

Outdoor Condenser Unit

M

HAFC 201 WITH 1 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.)

42

HAFC201 with 2 Speed Air Handler

To: Optional Aquastat on Return Line of Hydro Coil

THERMOSTAT

T Optional Power Wire to Thermostat that Requires 24VAC

To: Optional Aquastat or Thermostat to sense low ambient temperature

C R W Y G T T T T THERMOSTAT

WATER COIL FREEZE PR AQUASTATS

Power On Call for Heat Fan, Cooling Fan, Heating

HAFC201 HYDRO AIR FAN CONTROL OFF

DRY CONTACTS 1 MIN ON DELAY - FAN 3 MIN ON DELAY - FAN 2 MIN @ 24 HR - PUMP 30 SEC @ 2 WK - PUMP

ON

NOTE: For 4 minute on delay of Heating Fan, switch 1 and 3 MIN ON DELAY to ON position.

5 AMP 1/6 HP RATED

PUMP

BOILER

AIR HANDLER

XX X X C R Y G G

LOW HIGH

Hot

Line

“T T” on Boiler or Switching Relay

Low

Circulator

High

24 VAC

(or to “T T” on switching relay)

Fan Relays

Neutral

Outdoor Condenser Unit

M

HAFC 201 WITH 2 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.)

43

T

THERMOSTAT

POWER PM CALL FOR HEAT FAN, COOLING FAN, HEATING

AIR HANDLER

BOILER

POWER PM CALL FOR HEAT FAN, COOLING FAN, HEATING

AIR HANDLER

Fan Relays

Low

OUTDOOR CONDENSER UNIT

Line

2 SPEED AIR HANDLER

2 SPEED AIR HANDLER

SR 504

ZONE 1 ZONE 2 ZONE 3 ZONE 4

HIGH

M

2 SPEED AIR HANDLER

ZONE 4 PRIORITY ON OFF

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

DHW HEATER AQUASTAT

120V RELAY

24 VAC POWER

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

JUMPER TO: "TT" ON BOILER

BOILER

POWER PM CALL FOR HEAT FAN, COOLING FAN, HEATING

AIR HANDLER LOW

M

Line

M

HAFC101 HYDRO AIR FAN CONTROL BOILER

High

24 VAC

OUTDOOR CONDENSER UNIT

AQUASTAT

X X C R Y G G

HIGH

LOW

Fan Relays

Low

THERMOSTAT

X X C R Y G G

HIGH

High

24 VAC

LOW

C R W Y G T T

AQUASTAT

HAFC101 HYDRO AIR FAN CONTROL

X X C R Y G G

TO: AQUASTAT ON RETURN LINE OF HYDRO COIL

OPTIONAL POWER WIRE TO THERMOSTAT THAT REQUIRES 24VAC

C R W Y G T T

AQUASTAT

HAFC101 HYDRO AIR FAN CONTROL BOILER

T

TO: AQUASTAT ON RETURN LINE OF HYDRO COIL

OPTIONAL POWER WIRE TO THERMOSTAT THAT REQUIRES 24VAC

High

TO: AQUASTAT ON RETURN LINE OF HYDRO COIL

C R W Y G T T THERMOSTAT

THERMOSTAT

Fan Relays

T

Line

OPTIONAL POWER WIRE TO THERMOSTAT THAT REQUIRES 24VAC

THERMOSTAT

Low

THERMOSTAT

24 VAC

44

Multiple HAFC’s and Switching Relay

120 VAC INPUT

H N

OUTDOOR CONDENSER UNIT

3 Wire Thermostat Connected to TACO Switching Relay

3 WIRE THERMOSTAT

T

COM

T W

SR 504

T

T

R

ZONE 4 PRIORITY ON OFF ZONE 1 ZONE 2 ZONE 3 ZONE 4

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

24 VAC POWER 120V RELAY

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER

120 VOLT CIRCULATORS

INPUT

FUSE 1 AMP

H JUMPER

120 VAC INPUT

N

TO: "TT" ON BOILER

BOILER

45

THERMOSTAT

T

T

T

R RED

W

T T ZONE 1

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

24 VAC

ZVC 405 FIVE ZONE ZONE VALVE CONTROL

T T

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

JUMPER 3&4

RED RED

END SWITCH

BLACK BLACK

120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

WHITE

THERMOSTAT

WH

24 VAC

POWER IN

120 VAC INPUT BLACK

THERMOSTAT

C

COMMON

WHITE

FACTORY INSTALLED TRANSFORMER

46

3 Wire Thermostat Connected to TACO Zone Valve Control

TO T&T ON BOILER OR PUMP RELAY 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH)

3 WIRE ZONE VALVE (TACO TYPE)

MOTOR

END SWITCH

4 WIRE ZONE VALVE (HONEYWELL TYPE)

T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 POWER

White-Rogers 1361 Hydronic Zone Valve with TACO Zone Valve Control

WHITE

120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

WHITE

THERMOSTAT

THERMOSTAT

THERMOSTAT

T

T

T

RIGHT TT SCREW (SEE NOTE)

24 VAC

POWER IN

120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

NOTE: WHEN USING ZVC 404 OR ZVC 406, CONNECT WIRE #2 OF ZONE VALVE TO PRIORITY ZONE RIGHT TT SCREW

TERMINAL ASSIGNMENT CONTROL ZONE VALVE 1 1 2 TT (Rt) 3 3 4 2

T T ZONE 1

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

24 VAC

ZVC 405 FIVE ZONE ZONE VALVE CONTROL

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

T T

RED RED

ZONE 1 1 2 3 4

BLACK BLACK

END SWITCH

TO T&T ON BOILER OR PUMP RELAY 2 1 4 3

WHITE-ROGERS 1361 HYDRONIC ZONE VALVE

1 2 3 3 WIRE ZONE VALVE (TACO TYPE)

MOTOR

END SWITCH

4 WIRE ZONE VALVE (HONEYWELL TYPE)

T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 POWER

47

48

Honeywell VC 40 & 80 (spdt) Hydronic Zone Valve with TACO Zone Valve Control

THERMOSTAT

THERMOSTAT

T

T

T

RIGHT TT SCREW (SEE NOTE)

24 VAC

POWER IN

T T ZONE 1

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

24 VAC

ZVC 405 FIVE ZONE ZONE VALVE CONTROL

END SWITCH

ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

BLACK BLACK

120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

WHITE

THERMOSTAT

T T

RED RED

WHITE 120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

NOTE: WHEN USING ZVC 404 OR ZVC 406, CONNECT WIRE #3 OF ZONE VALVE TO PRIORITY ZONE RIGHT TT SCREW

TERMINAL ASSIGNMENT ZONE VALVE CONTROL ORANGE 1 3 BLUE 2 1 BROWN 3 TT (Rt) GRAY 4 4 BLACK 6 2

TO T&T ON BOILER OR PUMP RELAY 3 2

6 4 1

HONEYWELL VC (SPST) HYDRONIC ZONE VALVE SERIES 40 & 80

1 2 3 3 WIRE ZONE VALVE (TACO TYPE)

MOTOR

END SWITCH

4 WIRE ZONE VALVE (HONEYWELL TYPE)

T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 POWER

570 Zone Valve to Switching Relay

T

THERMOSTAT

24 VAC TRANSFORMER 1 2 3

24 VAC POWER

SR 503

ZONE1

ZONE2

ZONE3

THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP

N P ZC H

POWER ZONE 1 ZONE 2 ZONE 3

X2 X1 ZR ZONE1 ZONE2

ZONE3

JUMPERS

120 VOLT CIRCULATORS TO: 120 VAC POWER (NEUTRAL) TO: 120 VAC POWER (HOT) TO: "TT" ON AQUASTAT CONTROL TO: "TT" ON AQUASTAT CONTROL

49

WHITE

N

120 VAC INPUT BLACK

THERMOSTAT

THERMOSTAT

T

T

T

AQUASTAT ON DHW HEATER

A

24 VAC

ZONE 6 PRIORITY

MODE

NORMAL RESET

OFF

T T ZONE 1

24 VAC

EXTRA MAIN END END SWITCH SWITCH

N/O COM N/C ZONE 6 RELAY

T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

VALVE 2 T STAT 3 VALVE 3 T STAT 4

ZVC 406 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER

ZONE 6 1 2 3 4

JUMPER 3&4

TO BOILER AQUASTAT RELAY DRY CONTACTS

VALVE 1 T STAT 2

T T ZONE 6

JUMPER 3&4

SEE NOTE

PRIORITY ZONE MOTOR

END SWITCH

BOILER SYSTEM PUMP

T STAT 1

ON

FUSE (7 AMP MAX)

FACTORY INSTALLED TRANSFORMER

WHITE 120 VAC INPUT BLACK

THERMOSTAT

24 VAC

POWER IN

H

FACTORY INSTALLED TRANSFORMER

50

Zone Valve Control with 1 Low Temperature Zone Using Priority Zoning Circulator

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

1 2 3

MOTOR

END SWITCH

Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

TACO 3 WIRE ZONE VALVE

PRIORITY ON

PRIORITY ZONING CIRCULATOR SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.

PRIORITY THERMOSTAT 2 1

BOILER 4 3

PRIORITY POWER IN PR-IN PR-OUT LIVE NEUT

120 VAC INPUT

OFF

ON

Instruction Sheet SR501 Switching Relay

Features: External Indicator Lights Universal Replaceability Snap-in PC Board Simplified Wiring Fully Enclosed Snap-Out Relays 100% Factory Tested Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved Extended 3 Year Warranty Made in the USA

Typical Wiring

SR501 1 ZONE SWITCHING RELAY

Operation: Connect a thermostat to the “T T” terminals on the switching relay. When the thermostat calls for heat, the relay is energized and power is given to the circulator.

Alternative THERMOSTAT Wiring

THERMOSTAT

SR501 1 ZONE SWITCHING RELAY

24 R W VAC T T COM

POWER

POWER

T STAT

T STAT

120 VAC INPUT

120 VAC INPUT

4 4 6 6 5 N H 3 N/O N/C N/C N/O

4 4 6 6 5 N H 3 N/O N/C N/C N/O

JUMPER

JUMPER

Power Input: Connect 120 volt ac power to terminals N and H.

TO: ZC TO: TT ON BOILER

TO: 120 VAC POWER

External Diagnostics: The External lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized.

TACO SR501 REPLACEMNENT CROSS-REFERENCE

Specifications: PRODUCT NUMBER

NUMBER TRANSFORMER OF ZONES VOLTAGE

MAXIMUM COMBINED LOAD

DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH

SR501

1 Zone

7.2 amps

4 1/4"

2 3/4"

All Switching Relays are relay type DPDT, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.

MANUFACTURER

MODEL

CONNECTIONS

Taco

SR501

H

N

3

4 NO 4 NC 5

6 NO

Argo

AR821

1

2

3

4

6

5

6 NC

R/T

W/T C

T

AR822

L1 L2 3

4 NO 4 NC 5

6 NO

6 NC

R/T

G/T

Colombus

MR10

L1 L2 3

4 NO 4 NC 5

6 NO

6 NC

R/T

G/T

C

Erie

SR100

L1 L2 3

4 NO 4 NC 5

6 NO

6 NC

R/T

G/T

C

Honeywell

Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.

CIRCULATOR

Terminal Description: T&T Thermostat Connection COM Common side of transformer, to power some setback thermostats N Neutral wire of power input H Hot wire of power input 3 Common terminal for 4 n/o and 4 n/c 4 n/o Normally open terminal 4 n/c Normally closed terminal 6 n/c Normally closed terminal 6 n/o Normally open terminal 5 Common terminal for 6 n/o and 6 n/c

The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service.

5 1/4"

TO: ZR

TO: 120 VAC POWER

CIRCULATOR

Jumper Placement: The jumper is factory installed between terminals H and 3 to switch power on terminals 4 n/o and 4 n/c.

120 VAC Input

24 R W VAC T T COM

White-Rogers

RA89A

1

2

3

4

T

T

RA832A

1

2

3

4

X

X

T

T

R845A

1

2

3

4

5

6

T

T

889-189

1

2

3

4

T

T

829-845

1

2

3

4

T

T

5

Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.

6

C

Printed in USA Copyright 2000 TACO, Inc.

Visit our web site at: http://www.taco-hvac.com

51

Instruction Sheet SR501-845RP Universal Replacement Relay

THERMOSTAT

THERMOSTAT

Alternative Wiring

REPLACES HONEYWELL R845, RA89A & RA832 OR COMPARABLE RELAY

Typical Wiring

REPLACES HONEYWELL R845, RA89A & RA832 OR COMPARABLE RELAY

Features: Universal Replaceability Indicator Lights Snap-in PC Board to Existing Enclosure Simplified Wiring Fully Enclosed Snap-Out Relay 100% Factory Tested Universal Thermostat Compatibility UL Approved Extended 3 Year Warranty Made in the USA

R W T T

R W T T POWER

POWER

UNIVERSAL REPLACEMENT RELAY MODEL: SR501-845RP

Operation: Connect a thermostat to the “T T” terminals on the switching relay. When the thermostat calls for heat, the relay is energized and power is given to the circulator.

UNIVERSAL REPLACEMENT RELAY MODEL: SR501-845RP

T STAT

T STAT

120 VAC INPUT

120 VAC INPUT

L2 L1 3 4 5 6

L2 L1 3 4 5 6 TO: TT ON BOILER

Power Input: Connect 120 volt ac power to terminals L1 and L2.

TO: ZC

CIRCULATOR

TO: ZR

JUMPER

Jumper Placement: The jumper is factory installed between terminals L1 and 3 to switch power on terminal 4. Diagnostics: The Indicator lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service.

TO: 120 VAC POWER

Specifications: PRODUCT NUMBER

NUMBER OF ZONES

SR501-845RP

1 Zone

Thermostat Connection Neutral wire of power input Hot wire of power input Common terminal for 4 Normally open terminal Normally open terminal Common terminal for 6

TRANSFORMER MAXIMUM VOLTAGE COMBINED LOAD

DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH

120 VAC Input

4 1/4"

7.2 amps

CONNECTIONS

Taco

SR501-845RP

L1

L2

3

4

5

6

R/T

Argo

AR821

1

2

3

4

5

6

T

W/T

AR822

L1

L2

3

4 NO

5

6 NO

R/T

G/T

Colombus

MR10

L1

L2

3

4 NO

5

6 NO

R/T

G/T

Erie

SR100

L1

L2

3

4 NO

5

6 NO

R/T

G/T

Honeywell

RA89A

1

2

3

4

T

T

White-Rogers

RA832A

1

2

3

4

X

X

T

T

R845A

1

2

3

4

5

6

T

T

T

T

5

6

T

T

889-189

1

2

3

4

829-845

1

2

3

4

Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.

TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.

52

2 3/4"

TACO SR501-845RP REPLACEMENT CROSS-REFERENCE MANUFACTURER MODEL

Do it Once. Do it Right. Visit our web site at: http://www.taco-hvac.com

5 1/4"

All Switching Relays are relay type DPDT, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.

Terminal Description: T&T L2 L1 3 4 6 5

CIRCULATOR JUMPER

TO: 120 VAC POWER

Printed in USA Copyright 1999 TACO, Inc.

Instruction Sheet SR502 & SR503 Switching Relay THERMOSTATS

THERMOSTATS

Cold Start Boiler Application

Tankless Coil Boiler Application

24 VAC POWER

24 VAC POWER

SR 503

ZONE1

ZONE2

SR 503

ZONE3

ZONE1

THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP

N P ZC H

ZONE3

THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP

POWER ZONE 1 ZONE 2 ZONE 3

X2 X1 ZR ZONE1 ZONE2

ZONE2

N P ZC H

ZONE3

POWER ZONE 1 ZONE 2 ZONE 3

X2 X1 ZR ZONE1 ZONE2

ZONE3

JUMPERS

JUMPERS

TO: 120 VAC POWER (NEUTRAL)

TO: 120 VAC POWER (NEUTRAL)

TO: 120 VAC POWER (HOT)

TO: 120 VAC POWER (HOT) 120 VOLT CIRCULATORS

TO: "TT" ON AQUASTAT CONTROL

TO: "ZC" ON AQUASTAT CONTROL

120 VOLT CIRCULATORS

TO: "ZR" ON AQUASTAT CONTROL

TO: "TT" ON AQUASTAT CONTROL

Operation: When the thermostat calls for heat, the appropriate circulator is energized and the isolated end switch (X1 and X2) will start the boiler.

Operation: When any thermostat calls for heat, the boiler is given a signal to start. The appropriate circulator is energized only when the boiler temperature is above the set low limit.

Jumper Placement: The jumper should be placed between terminals ZC and H. Connect the isolated end switch, X1 and X2 to the boiler aquastat control. For zone 1 priority, remove jumper between terminals P and ZC.

Jumper Placement: The jumper should be placed between terminals H and X1. Connect terminal ZC to ZC terminal on the aquastat control. Connect terminal ZR to ZR terminal on the aquastat control. Confirm polarity is consistent between boiler aquastat and switching relay. For zone 1 priority, remove jumper between terminals P and ZC.

Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H.

Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H.

The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service.

Features:

External Diagnostics: Externally visible lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized. Specifications: PRODUCT NUMBER

NUMBER OF ZONES

TRANSFORMER VOLTAGE

MAXIMUM COMBINED LOAD

DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH

SR502 SR503

2 with Priority 3 with Priority

120 VAC Input 120 VAC Input

15 amps 15 amps

10 1/4" 10 1/4"

6 3/4" 6 3/4"

2 3/4" 2 3/4"

All Switching Relays are relay type DPST, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.

External Indicator Lights Priority Simplified Wiring Fully Enclosed Snap-Out Relays Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved 24 volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA

Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat

Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.

Printed in USA Copyright 1999 TACO, Inc.

Visit our web site at: http://www.taco-hvac.com

53

Instruction Sheet SR504 & SR506 Switching Relay THERMOSTATS

THERMOSTATS

Tankless Coil Boiler Application

Cold Start Boiler Application

SR 506

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

ZONE 6 PRIORITY ON

X

X

END SWITCH

ZC ZR

120 VOLT CIRCULATORS

FUSE 1 AMP

POWER ZONE 1 ZONE 2 ZONE 3

120V RELAY

24 VAC POWER

POWER INPUT

OFF

ZONE 4

ZONE 5 ZONE 6 ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

ZONE 6 PRIORITY ON

SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

120V RELAY

24 VAC POWER

SR 506

OFF

SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

X

X

END SWITCH

ZONE 5 ZONE 6

ZC ZR

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

120 VOLT CIRCULATORS

POWER INPUT

FUSE 1 AMP

JUMPER TO: "ZC" ON AQUASTAT

TO: "TT" ON BOILER

120 VAC INPUT

120 VAC INPUT TO: "ZR" ON AQUASTAT

Operation: When any thermostat calls for heat, the appropriate circulator is energized and the isolated end switch (X and X) will start the boiler.

Operation: When any thermostat calls for heat, the boiler is given a signal to start. The appropriate circulator is energized only when the boiler temperature is above the set low limit.

Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently.

Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently.

Jumper Placement: The jumper should be placed between terminals ZC and ZR. Connect the isolated end switch to the aquastat control on the boiler.

Jumper Placement: REMOVE the jumper between terminals ZC and ZR. Connect terminal ZC to ZC terminal on the aqua-stat control. Connect terminal ZR to ZR terminal on the aqua-stat control. Confirm polarity is consistent between boiler aquastat and switching relay.

Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H.

The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. External Diagnostics: Externally visible lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized.

Specifications: PRODUCT NUMBER

NUMBER OF ZONES

TRANSFORMER VOLTAGE

MAXIMUM COMBINED LOAD

DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH

SR504 SR506

4 with Priority 6 with Priority

120 VAC Input 120 VAC Input

20 amps 20 amps

10 1/4" 11 3/4"

6 3/4" 7 1/2"

2 3/4" 3"

All Switching Relays are relay type DPST, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.

Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Features:

External Indicator Lights Switchable Priority Simplified Wiring Fully Enclosed Snap-Out Relays Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved 24 volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA

Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.

Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Visit our web site at: http://www.taco-hvac.com

54

Printed in USA Copyright 1999 TACO, Inc.

Instruction Sheet SR503-EXP, SR504-EXP & SR506-EXP Switching Relay Cold Start Boiler Application

Tankless Coil Boiler Application

THERMOSTATS

EXPANSION CONNECTIONS 1234

SLAVE

POWER CONTROL INTERFACE

EXPANSION CONNECTIONS PLUG-IN CARDS

MASTER

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

RESET

24 VAC POWER

NORMAL

SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

120V RELAY

X

THERMOSTATS

X

END SWITCH

ZONE 6 PRIORITY ON OFF

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6

SR 506-EXP ZC ZR

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

120 VOLT CIRCULATORS

1234

SLAVE

POWER CONTROL INTERFACE

PLUG-IN CARDS

MASTER

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

RESET

24 VAC POWER

SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

120V RELAY

X

POWER INPUT

POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6

SR 506-EXP

X

ZC ZR

END SWITCH

FUSE 1 AMP

NORMAL

ZONE 6 PRIORITY ON OFF

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

120 VOLT CIRCULATORS

POWER INPUT

FUSE 1 AMP

JUMPER TO: "TT" ON BOILER

TO: "ZC" ON AQUASTAT

120 VAC INPUT

120 VAC INPUT

TO: "ZR" ON AQUASTAT

Operation: When any thermostat calls for heat, the appropriate circulator is energized and the isolated end switch (X and X) will start the boiler.

Operation: When any thermostat calls for heat, the boiler is given a signal to start. The appropriate circulator is energized only when the boiler temperature is above the set low limit.

Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently.

Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently.

Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized if priority zone is in operation, or through the operation of a plug-in reset control.

Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized if priority zone is in operation, or through the operation of a plug-in reset control.

Jumper Placement: The jumper should be placed between terminals ZC and ZR. Connect the isolated end switch to the aquastat control on the boiler.

Jumper Placement: REMOVE the jumper between terminals ZC and ZR. Connect terminal ZC to ZC terminal on the aqua-stat control. Connect terminal ZR to ZR terminal on the aqua-stat control. Confirm polarity is consistent between boiler aquastat and switching relay.

Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H.

Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H.

Expansion Connections: Set the expansion switch to MASTER on the switching relay that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of -EXP controls.

Expansion Connections: Set the expansion switch to MASTER on the switching relay that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of -EXP controls.

Features: External Indicator Lights Plug-In PowerPort Cards Switchable Priority Simplified Wiring Add-On Power Controls Fully Enclosed Snap-Out Relays Compact Design Fuse Protected 100% Factory Tested

External Diagnostics: Externally visible lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized.

Isolated End Switch Expandable to 20 Zones Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved 24 volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA

Specifications: PRODUCT NUMBER

NUMBER OF ZONES

POWER PORTS

TRANSFORMER VOLTAGE

MAXIMUM COMBINED LOAD

DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH

SR503-EXP SR504-EXP SR506-EXP

3 with Priority 4 with Priority 6 with Priority

3 3 3

120 VAC Input 120 VAC Input 120 VAC Input

20 amps 20 amps 20 amps

10 1/4" 10 1/4" 11 3/4"

6 3/4" 6 3/4" 7 1/2"

2 3/4" 2 3/4" 3"

All Switching Relays are relay type DPST, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.

Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.

Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.

Printed in USA Copyright 1999 TACO, Inc.

Visit our web site at: http://www.taco-hvac.com

55

Instruction Sheet ZVC403 & ZVC405 Zone Valve Control THERMOSTAT

THERMOSTAT

WHITE

24 VAC

T T ZONE 1 FUSE (5 AMP MAX)

120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

WHITE

THERMOSTAT

24 VAC

POWER IN

120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

Wiring Diagram

24 VAC

END SWITCH

T T ZONE 2

T T ZONE 4

T STAT 1

T T ZONE 5

VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4

ZVC 405 FIVE ZONE ZONE VALVE CONTROL

ZONE 1 1 2 3 4

N/O COM N/C

T T ZONE 3

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

VALVE 4 T STAT 5 VALVE 5 POWER

ZONE 5 1 2 3 4

Installation of Optional System T T

JUMPER 3&4 TO CIRCULATOR OR BOILER AQUASTAT RELAY

END SWITCH

1 2 3

DRY CONTACTS

N/O COM N/C

2 WIRE ZONE VALVE (NO END SWITCH)

MOTOR

TACO 3 WIRE ZONE VALVE

END SWITCH

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

HOT

T T

BOILER

120 VAC NEUTRAL

Operation/External Diagnostics: When any thermostat calls for heat, the appropriate zone valve is energized and the yellow light goes on. When the zone valve is fully open, the red light goes on and energizes the end switch relay. The green light should always be on, indicating that power is connected. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.

Specifications: PRODUCT NUMBER

NUMBER OF ZONES

TRANSFORMER VOLTAGE

MAX OUTPUT AT 24 VAC

ZVC403 ZVC405

3 Zone 5 Zone

120 VAC Input 120 VAC Input

40 VA 80 VA

DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 2 3⁄4" 3"

All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone of hp (5A) @ 120 VAC.

Features: External Indicator Lights Simplified Wiring Works with 2, 3, or 4Wire Zone Valves Compact Design Fuse Protected 100% Factory Tested Isolated End Switch

Extra Set of Dry Contacts Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved Sturdy Screw Connections Extended 3 Year Warranty Made in the USA

TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.

56

6 3⁄4" 71⁄2"

1⁄ 6

Do it Once. Do it Right. Visit our web site at: http://www.taco-hvac.com

10 1⁄4" 113⁄4"

Printed in USA Copyright 2000 TACO, Inc.

Instruction Sheet ZVC404 & ZVC406 Zone Valve Control Wiring Diagram

24 VAC

24 VAC

T T ZONE 1

24 VAC

Installation of Optional System and/or DHW Circulator

EXTRA MAIN END END SWITCH SWITCH

N/O COM N/C ZONE 6 RELAY

T T

T T ZONE 2

SYSTEM CIRCULATOR DHW CIRCULATOR

T T ZONE 4

T T ZONE 5

T T ZONE 6

SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY ZONE 1 1 2 3 4

ZONE 2 1 2 3 4

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4

ZVC 406

VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER

ZONE 6 1 2 3 4

JUMPER 3&4

SEE NOTE

PRIORITY ZONE

DRY CONTACTS

BOILER

T T ZONE 3

JUMPER 3&4

TO CIRCULATOR OR BOILER AQUASTAT RELAY

N/O COM N/C

OFF ON

FUSE (7 AMP MAX)

120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

WHITE

ZONE 6 PRIORITY

MODE

NORMAL RESET

POWER IN

FACTORY INSTALLED TRANSFORMER

WHITE

T T

THERMOSTAT INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT

120 VAC INPUT BLACK

EXTRA MAIN END END SWITCH SWITCH

THERMOSTAT

THERMOSTAT

1 2 3 2 WIRE ZONE VALVE (NO END SWITCH)

TACO 3 WIRE ZONE VALVE

MOTOR

END SWITCH

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

(See Note)

NEUTRAL 120 VAC HOT

Operation/External Diagnostics: When any thermostat calls for heat, the appropriate zone valve is energized and the yellow light goes on. When the zone valve is fully open, the red light goes on and energizes the end switch relay. The green light should always be on, indicating that power is connected. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized if priority zone is in operation. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service.

Specifications: PRODUCT NUMBER

NUMBER OF ZONES

TRANSFORMER VOLTAGE

MAX OUTPUT AT 24 VAC

ZVC404 ZVC406

4 with Priority 6 with Priority

120 VAC Input 120 VAC Input

40 VA 80 VA

DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 101⁄4" 113⁄4"

63⁄4" 71⁄2"

23⁄4" 3"

All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone of 1⁄ hp (5A) @ 120 VAC. 6

Features: External Indicator Lights Switchable Priority Simplified Wiring Works with 2, 3, or 4-Wire Zone Valves Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Extra Set of Dry Contacts Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved Sturdy Screw Connections Extended 3 Year Warranty Made in the USA Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs.

Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.

Printed in USA Copyright 2000 TACO, Inc.

Visit our web site at: http://www.taco-hvac.com

57

Instruction Sheet ZVC404-EXP & ZVC406-EXP Zone Valve Control THERMOSTAT

THERMOSTAT

WHITE

POWER CONTROLS

N/O COM N/C

SLAVE

1 2 3 4

T T ZONE 1

EXPANSION MASTER

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF

T STAT 1 VALVE 1 T STAT 2 VALVE 2

SIX ZONE ZONE VALVE CONTOL WITH OPTIONAL PRIORITY

T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6

END SWITCH B PUMP

N/O COM N/C ZONE 6 RELAY

ZONE 1 1 2 3 4

END SWITCH A BOILER

TO CIRCULATOR OR BOILER AQUASTAT RELAY

TO CIRCULATOR OR BOILER AQUASTAT RELAY

ZONE 3 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4

ZONE 6 1 2 3 4

JUMPER 3&4

MOTOR

1 2 3

2 WIRE ZONE VALVE (NO END SWITCH)

SYSTEM CIRCULATOR

ZONE 2 1 2 3 4

JUMPER 3&4

DRY CONTACTS

END SWITCH A BOILER

T T ZONE 2

ZVC 406-EXP

NORMAL FUSE 7 AMP MAX

24 VAC

RESET

ZONE 6 PRIORITY ON

PLUG-IN CARDS

MODE

Installation of Optional System and/or DHW Circulator END SWITCH B PUMP

INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT

24 VAC

TACO, INC ZVC406-EXP

120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

WHITE

THERMOSTAT

24 VAC

POWER IN

120 VAC INPUT BLACK

FACTORY INSTALLED TRANSFORMER

Wiring Diagram

TACO 3 WIRE ZONE VALVE

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE

4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)

T T BOILER DHW CIRCULATOR (See Note)

120 VAC

NEUTRAL

HOT

Operation/External Diagnostics: When any thermostat calls for heat, the appropriate zone valve is energized and the yellow light goes on. When the zone valve is fully open, the red light goes on and energizes the end switch relays. The green light should always be on, indicating that power is connected. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. Mode Operation: When the mode switch is set to NORMAL, both end switch relays will be energized if any zone is in operation. When the mode switch is set to RESET, the end switch relay “A” will only be energized when the priority zone is in operation. The end switch relay “B” will be energized when any zone is in operation Power Input: Connect 120 volt ac power input to leads on transformer. Neutral to white wire. Hot to black wire. Expansion Connections: Set the expansion switch to MASTER on the zone valve control that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of Switching Relay -EXP or Zone Valve -EXP controls.

The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service.

Specifications: PRODUCT NUMBER

NUMBER OF ZONES

ZVC404-EXP 4 with Priority ZVC406-EXP 6 with Priority

TRANSFORMER VOLTAGE

MAX OUTPUT AT 24 VAC

120 VAC Input 120 VAC Input

80 VA 80 VA

DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 113⁄4" 113⁄4"

71⁄2" 71⁄2"

3" 3"

All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone of 1⁄6 hp (5A) @ 120 VAC.

Features: External Indicator Lights Plug-In PowerPort Cards Switchable Priority Simplified Wiring Add-On Power Controls Works with 2, 3, or 4-Wire Zone Valves UL Approved Fuse Protected 100% Factory Tested

Isolated End Switch Expandable to 20 Zones Extra Set of Dry Contacts Contractor Friendly PC Board Layout Universal Thermostat Compatibility Sturdy Screw Connections Extended 3 Year Warranty Made in the USA

Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.

Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Visit our web site at: http://www.taco-hvac.com

58

Printed in USA Copyright 2000 TACO, Inc.

Instruction Sheet Hydro Air Fan Controls To: Optional Aquastat on Return Line of Hydro Coil

THERMOSTAT

Optional Power Wire to Thermostat that Requires 24VAC

4

1 minute on fan delay, in heating mode 3 minute on fan delay, in heating mode 4 minute on fan delay, in heating mode Pump dry contact activated for 2 minutes every 24 hours (boiler contacts not activated) Pump dry contacts activated for 30 seconds every two weeks (boiler contacts not activated)

External Diagnostics: The external lights show full functionality of the Hydro Air Fan Control. The green light should always be on, indicating that power is connected. Red lights indicate fan operation for heating and cooling modes. Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.

Specifications:

Power On Call for Heat Fan, Cooling Fan, Heating

AQUASTAT

Power On Call for Heat Fan, Cooling Fan, Heating

HAFC101 HYDRO AIR FAN CONTROL

DRY CONTACTS 5 AMP 1/6 HP RATED 1 MIN ON DELAY - FAN 3 MIN ON DELAY - FAN 2 MIN @ 24 HR - PUMP 30 SEC @ 2 WK - PUMP

1 2 1&2 3

THERMOSTAT

AQUASTATS

HAFC201 HYDRO AIR FAN CONTROL

ON

Switch Settings (HAFC201):

WATER COIL FREEZE PR

THERMOSTAT

To: Aquastat on Return Line of Hydro Coil

Optional Power Wire to Thermostat that Requires 24VAC

C R W Y G T T

C R W Y G T T T T

Additional HAFC201 Operations:

PUMP

BOILER

BOILER

AIR HANDLER

AIR HANDLER

X X C R Y G G

XX X X C R Y G G Jumper

Hot

Dry Contacts To: “T T” on Boiler or Switching Relay

M

1 Speed Air Handler*

Fan Relays

High

Dry Contacts To: “T T” on Boiler or Switching Relay

Low

Fan Relay

Circulator

Outdoor Condenser Unit

Line

(or to “T T” on switching relay)

24 VAC

Neutral 24 VAC

Selectable one, three or four minute delay on fan operation in heating mode. Selectable pump exercise activates circulator but does not enable boiler contacts. Two minutes every 24 hours minimizes the chance of bacteria build-up in an open loop system. Thirty seconds every two weeks minimizes seasonal start-up problems generally associated with harsh water conditions. Optional aquastat or thermostat can be connected to Freeze Protection TT terminals to reduce the chance of pipes freezing by energizing the pump dry contacts (boiler contacts not activated.)

To: Optional Aquastat or Thermostat to sense low ambient temperature

OFF

The Hydro Air Fan Control is an interface between the thermostat and air handler. It also has an isolated end switch to start the boiler and/or pump. When the thermostat calls for heat, the Fan Control energizes the end switch relay and allows the fan to operate at low speed when the water is above the optional aquastat setting. When the thermostat calls for cooling, the Fan Control energizes the condenser and operates on high speed.

Line

Operation HAFC101 and 201:

THERMOSTAT

Outdoor Condenser Unit

M

2 Speed Air Handler*

* Both HAFC101 and 201 capable of 1 and 2 speed applications

Terminal Description: Thermostat: C Optional: Common side of transformer W White - Heating signal to power some styles of thermostats Y Yellow - Condenser signal R Red - Hot side of transformer used to G Green - Fan signal switch all functions Water Coil Aquastat: TT Connect to aquastat at air handler to control operation of the fan when in the heating mode. Install a jumper if the aquastat is not used Freeze Protection Aquastat: TT Connect to aquastat or thermostat to sense low ambient temperature. Reduces the chance of pipes freezing by energizing the pump dry contacts. Pump Dry Contacts: XX May switch pump directly by bringing in external line voltage or connect to “T T” on a switching relay. Boiler Dry Contacts: XX Connect to the boiler or “T T” terminals on a switching relay. Air Handler: C Common side of transformer to power the Fan Control R Red - Hot side of transformer used to switch all functions Y Yellow - Condenser signal One Speed Motor: Glow Connect the fan to the relay. Keep the jumper installed between Ghigh and Glow. Two Speed Motor: Ghigh Remove jumper and connect Ghigh to the high speed fan relay and connect Glow to the low speed fan relay.

** Model number changed from SR501-F

PRODUCT NUMBER POWER INPUT MAXIMUM RELAY THERMOSTAT SINGLE PHAZE MOTOR NUMBER OF ZONES VOLTAGE COMBINED LOAD TYPE CURRENT RATING (RELAY) HAFC101** 1 Zone 24 VAC Input 5 amps DPDT .18 1/6 HP(5A) @120VAC HAFC201•• 1 Zone 24 VAC Input 5 amps DPDT .18 1/6 HP(5A) @120VAC The Hydro Air Fan Controls are relay type DPDT, have a thermostat current of .18 and a single phase motor rating per zone of 1/6

DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 4 1/4" 5 1/4" 2 3/4" 4 1/4" 5 1/4" 2 3/4" HP (5A) @ 120 VAC.

Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.

Printed in USA Copyright 1999 TACO, Inc.

Visit our web site at: http://www.taco-hvac.com

59

Instruction Sheet

102-094

PC600 Post Purge Timer Plug-In PowerPort Card SUPERSEDES: August 1, 1997 Plant ID No. 9300-867

EFFECTIVE: May 1, 2000

Operation: Once the priority zone is satisfied, the PC600 maintains power to the circulator, but does not fire the boiler. The circulator purges excess heat into the priority zone, minimizing standby loss during warm weather months and optimizing boiler operation when used with a boiler reset control. Power can be maintained to the circulator from a minimum of 10 seconds to a maximum of 420 seconds. The power LED light is energized when the priority zone or the post purge card is in operation. Installation: The PC600 can be installed in any one of the PowerPort terminals located on the Taco Expandable (-EXP) Control(s). Remove the shunt/jumper between pins 9 & 10 on the PowerPort terminal before installing the PC600. Align the connector on the base of the post purge card with the PowerPort terminal on the Expandable Control and push until the two mate. XX Terminals (Optional): The XX terminals on the post purge card can be wired to TT on the boiler to fire only when the priority zone is calling for heat. If using a boiler with an internal reset control, wire the XX terminals in parallel with the TT connections of the internal reset control.

Do it Once. Do it Right.

Printed in USA

TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.

Instruction Sheet

Copyright 2000 TACO, Inc.

102-095

PC605 Priority Protection Plug-In PowerPort Card SUPERSEDES: MAY 1, 1998 PLANT ID NO. 9300-1012

EFFECTIVE: MAY 1, 2000

Operation: The PC605 Priority Protection Plug-In Card is a solid state control that helps prevent freeze-ups in the event of a priority zone failure. If the priority zone calls for heat continuously for more than one hour, power is returned to the space heating (non-priority) zones, allowing all zones to function independently. Once the priority zone is satisfied, the PC605’s auto-reset is activated and the priority zone is again allowed to have priority for up to one hour the next time it calls. The one hour time frame is not adjustable. The red LED light is energized only when the Priority Protection Card is operating in priority override mode. Installation: The PC605 can be installed in any unoccupied PowerPort terminal located on the Taco Expandable (-EXP) Control(s). Do not remove the shunt between pins 9 & 10 on the Expandable Control unless a PC600 is also installed. Align the connector on the base of the priority protection card with the PowerPort terminal on the Expandable Control and push until the two mate. The PC605 can be used in conjunction with any other Taco PC style PowerPort Cards or Add-on Controls.

Do it Once. Do it Right.

Printed in USA

TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.

Instruction Sheet

Copyright 2000 TACO, Inc.

102-096

PC610 Pump Exercise and Timer Plug-In PowerPort Card SUPERSEDES: May 31, 1998 Plant ID No. 9300-1025

EFFECTIVE: May 1, 2000

Operation: The PC610 Pump Exercise and Timer Plug-In Card is a solid state universal timer designed to cycle all the pumps that are attached to the Expandable Control(s) at selected time intervals. This minimizes seasonal start-up problems generally associated with harsh water conditions. The control can be configured to reduce the chance of freeze-ups by cycling the pumps more often during cold weather months. Bacteria can be minimized in heating systems that utilize domestic hot water heaters as their heat source by systematically circulating the water. Installation: The PC610 can be installed in any unoccupied PowerPort terminal located on the Taco Expandable (-EXP) Control(s). Do not remove the shunt between pins 9 & 10 on the Expandable Switching Relay unless a PC600 is also installed. Align the connector on the base of the priority protection card with the PowerPort terminal on the Expandable Switching Relay and push until the two mate. The PC610 can be used in conjunction with any other Taco PC style PowerPort Cards or Add-on Controls. Typical Settings: Application On Time Off Time Pump Exercise Bacteria Minimization Freeze Protection

30 sec. 4 min. 4 min.

2 weeks 12 hours 1 hour

Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.

60

Printed in USA Copyright 2000 TACO, Inc.

Taco Low Water Cutoff Replacement Guide

Taco

LTA1203N-1

LTM1203N-1

LTA0243N-1

LTM0243N-1 LTA1203R-1 LTM1203R-1 LTA1202R-1 LTM1202R-1 LTA0242R-1 LNA0243S-1 LNA1203S-1 P3R-1 LTA1203S-1 LTM1203S-1 LTA0243S-1 LTM0243S-1

McDonnell & Miller 900 900C PS-800-120 PS-801-120 PS-850-120 PS-851-120 900M 901M 902M PS-801-M-120 PS-850-M-120 PS-851-M-120 PS-800-24 PS-802-24 PS-850-24 PS-852-24 PS-850-M-24 PS-802-M-24 PS-852-M-24 750-120 750-T-120 750-M-120 750-MT-120 PS-851-RX2-120 PS-851-M-RX2-120 PS-802-RX2-24 RB-24 901 RB-120 RB-120II RB-122 RS-1-LP PS-851-SP-120 PS-851-SP-M-120 PS-852-SP-24 PS-852-SP-M-24

Hydrolevel

Honeywell

450 650

RW700A1031 RW700A1056 RW700A1080

550 750

RW700B1054 RW700B1039 RW700B1021

400 600

RW700A1098

500 700 650R 550R 650R 550R 400R 24SV 170SV

RW700A1007 RW700A1106

650SV 550SV 600SV 500SV

Bold / Italics Indicates Discontinued Part Number

61

Taco LT Series 120 Volt LWCO Competitive Wiring Cross Reference 120 VAC Models with 120 VAC Burner Circuits PS-801/851-120 w/Red & Amber LEDs Series 750

LTx120x NC COM NO

H

N

GND

1

P HOT

BURNER CIRCUIT

2

NEUTRAL

P1

P2

5

HOT BURNER CIRCUIT

NEUTRAL

PS-801/851-120 w/Red & Green LEDs

450, 550, 650 & 750 1

4

120 VAC CIRCUIT

120 VAC CIRCUIT

2

3

A

N

HOT

H

C

W

B

HOT BURNER CIRCUIT

120 VAC CIRCUIT

BURNER CIRCUIT

120 VAC CIRCUIT

NEUTRAL

NEUTRAL

120 VAC Models with 24 VAC Burner Circuits PS-801/851-120 w/Red & Amber LEDs Series 750

LTx120x NC COM NO

H

N

GND

P

1 HOT

BURNER CIRCUIT

120 VAC CIRCUIT

2

HOT

NEUTRAL

24 VAC TRANSFORMER

HOT 120 VAC CIRCUIT NEUTRAL

62

P1

P2

24 VAC TRANSFORMER

PS-801/851-120 w/Red & Green LEDs A

BURNER CIRCUIT

24 VAC TRANSFORMER

5 BURNER CIRCUIT

450, 550, 650 & 750 1

4

120 VAC CIRCUIT NEUTRAL

2

3

N

H

C

W

HOT

BURNER CIRCUIT

120 VAC CIRCUIT NEUTRAL

B

24 VAC TRANSFORMER

Taco LT Series 24 Volt LWCO Competitive Wiring Cross Reference 24 VAC Models with 24 VAC Burner Circuits

LTx024x NC COM NO

H

N

GND

P HOT

BURNER CIRCUIT

24 VAC CIRCUIT NEUTRAL

PS-802/852-24

400, 500, 600 & 700 2

1

P1

P2

A

N

HOT

H

C

W

B

HOT BURNER CIRCUIT

24 VAC CIRCUIT

BURNER CIRCUIT

24 VAC CIRCUIT

NEUTRAL

NEUTRAL

24 VAC Models with 120 VAC Burner Circuits

LTx024x NC COM NO

H

N

GND

P

HOT BURNER CIRCUIT

120 VAC CIRCUIT

24 VAC TRANSFORMER

NEUTRAL

PS-802/852-24

400, 500, 600 & 700 2

1

P1

P2

HOT

A

N

C

W

B

HOT BURNER CIRCUIT

120 VAC CIRCUIT

BURNER CIRCUIT

120 VAC CIRCUIT

24 VAC TRANSFORMER NEUTRAL

H

24 VAC TRANSFORMER NEUTRAL

63

Taco LN Series 120 Volt LWCO Competitive Wiring Cross Reference 120 VAC Models with 120 VAC Burner Circuits

RB-120

LNA120S N

H

COM NC

NO

HOT

1

2

3

4

5

HOT BURNER CIRCUIT

120 VAC CIRCUIT

BURNER CIRCUIT

120 VAC CIRCUIT

NEUTRAL

NEUTRAL

170

RB-122 N

H

B

C

GN

HOT

H

P1

P2

A

HOT BURNER CIRCUIT

120 VAC CIRCUIT

BURNER CIRCUIT

120 VAC CIRCUIT

NEUTRAL

NEUTRAL

120 VAC Models with 24 VAC Burner Circuits

RB-120

LNA120S N

H

COM NC

HOT

BURNER CIRCUIT

120 VAC CIRCUIT NEUTRAL

NO

1

H

B

HOT

NEUTRAL

64

24 VAC TRANSFORMER

5

120 VAC CIRCUIT

24 VAC TRANSFORMER

170 C

GN

BURNER CIRCUIT

120 VAC CIRCUIT

4

BURNER CIRCUIT

RB-122 N

3

HOT

NEUTRAL

24 VAC TRANSFORMER

2

HOT 120 VAC CIRCUIT NEUTRAL

H

P1

P2

A

BURNER CIRCUIT

24 VAC TRANSFORMER

Taco LN Series 24 Volt LWCO Competitive Wiring Cross Reference 24 VAC Models with 24 VAC Burner Circuits

RB-24

LNA024S N

H

COM NC

Red White Yellow Yellow Wire Wire Wire Wire

NO

HOT 24 VAC CIRCUIT

HOT BURNER CIRCUIT

BURNER CIRCUIT

24 VAC CIRCUIT

NEUTRAL

NEUTRAL

24 Black White Orange Brown Wire Wire Wire Wire

HOT BURNER CIRCUIT

24 VAC CIRCUIT NEUTRAL

24 VAC Models with 120 VAC Burner Circuits

LNA024S N

H

COM NC

NO

HOT 120 VAC CIRCUIT

BURNER CIRCUIT

NEUTRAL 24 VAC TRANSFORMER

65

Wiring TACO LN or LT Series 24VAC Low Water Cutoff to McDonnell & Miller Series WF2 Uni-Match Electric Water Feeder SWITCH POSITION #2 1

UNI-MATCH WATER FEEDER MODEL WF2-U-24

2

3

0R

W

N

M&M 2 3

H

Set the TACO LT Model’s DOM to 30 seconds and DOB to 15 seconds.*

24VAC SUPPLY 50/60 Hz

N * Note on switch position:

H BURNER

N

H

COM

Switch setting 1 (M&M), the feed cycle repeats indefinitely. Position 2 and 3 gives one feed cycle. If using the LN series, choose whichever position best matches the application:

NC NO

AC POWER OUTPUT CONTACTS

24 VAC LWCO Using Burner Circuit Power Source Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages.

WF-2 switch to position 1 - 60 sec. delay, 90 sec. feed, repeats WF-2 switch to position 2 - 90 sec. delay, 90 sec. feed WF-2 switch to position 3 - 100 sec. delay, 90 sec. feed

Do not connect feeder to a manual reset LWCO.

Wiring TACO LN or LT Series 120VAC Low Water Cutoff to McDonnell & Miller Series WF2 Uni-Match Electric Water Feeder SWITCH POSITION #2 1

UNI-MATCH WATER FEEDER MODEL WF2-U-120

2

3

0R

W

N

M&M 2 3

H

Set the TACO LT Model’s DOM to 30 seconds and DOB to 15 seconds.*

120VAC SUPPLY 50/60 Hz

N * Note on switch position:

H BURNER

N

H

COM

NC NO

AC POWER OUTPUT CONTACTS

120 VAC LWCO Using Burner Circuit Power Source Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. Do not connect feeder to a manual reset LWCO. 66

Switch setting 1 (M&M), the feed cycle repeats indefinitely. Position 2 and 3 gives one feed cycle. If using the LN series, choose whichever position best matches the application: WF-2 switch to position 1 - 60 sec. delay, 90 sec. feed, repeats WF-2 switch to position 2 - 90 sec. delay, 90 sec. feed WF-2 switch to position 3 - 100 sec. delay, 90 sec. feed

Wiring TACO LN or LT Series 24VAC Low Water Cutoff to Hydrolevel VXT-24 Water Feeder (Non-Display Model)

SAFGARD VXT-24 WATER FEEDER WHITE

BLACK

Set the TACO LT Model’s DOB to 30 seconds and DOM to 15 seconds. Set Safgard as desired.

24VAC SUPPLY 50/60 Hz

N H

BURNER

N

H

COM

NC NO

AC POWER OUTPUT CONTACTS

24 VAC LWCO Using Burner Circuit Power Source Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. Do not connect feeder to a manual reset LWCO.

Wiring TACO LN or LT Series 120VAC Low Water Cutoff to Hydrolevel VXT-120 Water Feeder (Non-Display Model)

SAFGARD VXT-120 WATER FEEDER WHITE

BLACK

Set the TACO LT Model’s DOB to 30 seconds and DOM to 15 seconds. Set Safgard as desired.

120VAC SUPPLY 50/60 Hz

N H

BURNER

N

H

COM

NC NO

AC POWER OUTPUT CONTACTS

120 VAC LWCO Using Burner Circuit Power Source Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. Do not connect feeder to a manual reset LWCO. 67

Wiring TACO LN or LT Series 24VAC Low Water Cutoff to Hydrolevel VXT-24 Programmable Water Feeder (Model with Display)

SAFGARD VRTX-24 WATER FEEDER WHITE

BLACK

RED

Set the TACO LT Model’s DOB to 30 seconds and DOM to 15 seconds. Set Safgard as desired.

24VAC SUPPLY 50/60 Hz

N H

BURNER

N

H

COM

NC NO

AC POWER OUTPUT CONTACTS

24 VAC LWCO Using Burner Circuit Power Source Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. Do not connect feeder to a manual reset LWCO.

Wiring TACO LN or LT Series 120VAC Low Water Cutoff to Hydrolevel VXT-120 Programmable Water Feeder (Model with Display)

SAFGARD VRTX-120 WATER FEEDER WHITE

BLACK

RED

Set the TACO LT Model’s DOB to 30 seconds and DOM to 15 seconds. Set Safgard as desired.

120VAC SUPPLY 50/60 Hz

N H

BURNER

N

H

COM

NC NO

AC POWER OUTPUT CONTACTS

120 VAC LWCO Using Burner Circuit Power Source Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. Do not connect feeder to a manual reset LWCO. 68

Taco Industrial Flow Switch Replacement Guide

Taco IFS01BF-1

Potter IFS-1

IFS01BR-1

McDonnell & Miller FS4-3

Hydrolevel 44-100

FS4-3-RP

IFS01SF-1

IFSS-1

FS4-3S FS4-3S-E

IFS02BF-1

IFS-2

FS4-3D FS4-3D-E

IFS02SF-1 IFSH1BF-1 IFSH1SF-1 IFSH2BF-1 IFSH2SF-1 IFSW2BF-1 IFSW2SF-1

IFSS-2 IFS-HC-1 IFSS-HC-1 IFS-HC-2 IFSS-HC-2 IFS-WP-2 IFSS-WP-2

IFSWSBF-1

IFS-WPS IFS-WP-1

IFSWSSF-1

IFSS-WPS IFSS-WP-1

IFSWTBF-1 IFSWTBR-1

Johnson Controls / Penn F61KB-11 F61LB-1

FS4-3DS

FS8-W

F61MB-1 F61MB-5

IFS-WPT FS4-3RP-T

69

Aquastat Wiring L1 (HOT)

L2 (NEUTRAL) 120 VAC INPUT

L1

T

L2

TACO ZONE CONTROL

T END SWITCH

C1

B2

ZC

C2

ZR

B1

CIRCULATOR ON BOILER (IF ATTACHED)

HONEYWELL L8124A & C OR EQUAL LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE

MILLI-VOLTAGE GAS VALVE

B1

T

B2

TACO ZONE CONTROL

T END SWITCH

C

L1

L1 (HOT)

T1

L2

CIRCULATOR ON BOILER (IF ATTACHED)

C2

L2 (NEUTRAL)

120 VAC INPUT

HONEYWELL L8124B OR EQUAL

TACO ZONE CONTROL

Z

T2

END SWITCH CIRCULATOR ON BOILER (IF ATTACHED)

B1

C2

L1

L2

B2

LOW VOLTAGE GAS VALVE

70

C1

L1 (HOT)

120 VAC INPUT

L2 (NEUTRAL)

HONEYWELL L8124E OR EQUAL

Aquastat Wiring

TV

TACO ZONE CONTROL

Z

T

END SWITCH

L1

ZC

ZR

B1

L2

B2 C2

C1

LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE

120 VAC INPUT

L1 (HOT)

CIRCULATOR ON BOILER (IF ATTACHED)

L2 (NEUTRAL)

L1 (HOT)

HONEYWELL L8124G & L OR EQUAL

L2 (NEUTRAL) 120 VAC INPUT

L1

T

L2

TACO ZONE CONTROL

T END SWITCH

B2

C1

ZC

C2

ZR

B1

CIRCULATOR ON BOILER (IF ATTACHED)

L1 (HOT)

HONEYWELL L8124M OR EQUAL LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE

L2 (NEUTRAL) 120 VAC INPUT

L1

T

L2

TACO ZONE CONTROL

T END SWITCH

3

C1

C2

B1

CIRCULATOR ON BOILER (IF ATTACHED)

B2

LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE

HONEYWELL L8148A OR EQUAL

71

Aquastat Wiring

TV

TACO ZONE CONTROL

T

W

END SWITCH CIRCULATOR ON BOILER (IF ATTACHED)

Z

B1

C1

C2

L1

L2

B2

L1 (HOT)

LOW VOLTAGE GAS VALVE

TV

W

TP

Z

120 VAC INPUT

L2 (NEUTRAL)

HONEYWELL L8148E OR EQUAL

TACO ZONE CONTROL

T END SWITCH

MILLIVOLTAGE GAS VALVE

B1

B2

CIRCULATOR ON BOILER (IF ATTACHED)

C2

L1

L2

B3

LOW VOLTAGE GAS VALVE

OR

C1

L1 (HOT)

L1 (HOT)

120 VAC INPUT

L2 (NEUTRAL)

HONEYWELL L8148J OR EQUAL

L2 (NEUTRAL) 120 VAC INPUT

L1

B1

L2

B2 C2

TACO ZONE CONTROL

OIL BURNER AND IGNITION END SWITCH

C1 ZC

CIRCULATOR ON BOILER (IF ATTACHED)

ZR T

T

F

F

CAD CELL

72

HONEYWELL L8182D OR EQUAL

Aquastat Wiring

L1 (HOT)

L2 (NEUTRAL)

120 VAC INPUT

L1

T

L2

TACO SWITCHING RELAY

T

T

ZC

ZR

N

H

THERMOSTAT (IF INDEPENDENT ZONE)

C1

B2

ZC

C2

ZR

B1

CIRCULATOR ON BOILER (IF ATTACHED)

THERMOSTAT (IF INDEPENDENT ZONE)

T

TV

HONEYWELL L8124A & C OR EQUAL LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE

TACO SWITCHING RELAY ZC

Z

T

L1

ZC

ZR

B1

L2

B2 C2

C1

120 VAC INPUT

CIRCULATOR ON BOILER (IF ATTACHED)

L2 (NEUTRAL)

L1 (HOT)

ZR

N

H

LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE

HONEYWELL L8124G & L OR EQUAL

L1 (HOT)

120 VAC INPUT

L1

L2 (NEUTRAL) T

L2

TACO SWITCHING RELAY

T

T

ZC

ZR

N

H

THERMOSTAT (IF INDEPENDENT ZONE)

C1

B2

C2

ZC

ZR

CIRCULATOR ON BOILER (IF ATTACHED)

B1

LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE

HONEYWELL L8124M OR EQUAL

73

Aquastat Wiring L1 (HOT) 120 VAC

L2 (NEUTRAL)

INPUT

L1

T

L2

R B2

3

W

B

B L6006 LOW LIMIT CONTROLER

TACO SWITCHING RELAY

T

T

ZC

ZR

N

H

THERMOSTAT (IF INDEPENDENT ZONE)

R C2

C1

B1

B2

LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE

CIRCULATOR ON BOILER (IF ATTACHED)

L1 (HOT)

L2 (NEUTRAL)

120 VAC INPUT

L1

HONEYWELL L8148A OR EQUAL

B1

L2

B2 C2

OIL BURNER AND IGNITION

C1 ZC

TACO SWITCHING RELAY ZC

ZR

N

H

CIRCULATOR ON BOILER (IF ATTACHED)

ZR T

T

T

74

F THERMOSTAT (IF INDEPENDENT ZONE)

F

CAD CELL

HONEYWELL L8182D OR EQUAL

Standard Terms and Definitions Switching Relay: Transformer and relay in one box, which allows a low voltage thermostat to control a line voltage load (circulator), with an isolated end switch that can energize the boiler.

Zone Valve Control: Transformer and relay in one box, which allows a low voltage thermostat to control a low voltage zone valve, with an isolated end switch that can energize the boiler and/or circulators.

Dry Contacts: Set of relay contacts that make and beak, where no voltage is present. Usually can switch 24 or 120 VAC. Isolated End Set Switch: Set of dry contacts that make when a zone calls for heat. Usually connected to a boiler’s aquastat TT. Mode Switch: Switch set to NORMAL – When any zone calls for heat, the end switch will make and fire the boiler. Switch set to RESET – When any zone calls for heat, a heat demand signal is given to external add-on reset control and it controls boiler operation.Also when the priority zone calls for heat and is switched to priority, the end switch will override reset control and fire boiler to high limit.

TT: Where thermostat or aquastat connects on a heating control. XX: Denotes Isolated End Switch. Low Voltage: 24 VAC for most HVAC systems. Line Voltage: Normally 120 VAC relative to ground. H or L1: Hot side of line voltage. N or L2: Neutral side of line voltage. ZR: 120 VAC (Hot) signal from switching relay to boiler’s operating aquastat to fire the burner to high limit when any zone calls for heat. Also ideal for controlling primary circulator.

ZC: 120 VAC (Hot) signal from boiler’s operating aquastat to switching relay allowing circulator(s) to run when aquastat is above the set low limit. Cold Start: A boiler that fires only when there is a call for heat. Tankless Coil: A method of heating domestic water utilizing a heat exchanger inside a boiler.The boiler also maintains heat year round to deliver hot water on demand.

DHW Heater: A method of heating domestic water utilizing a heat exchanger and storage tank. Transformer: A component for increasing or reducing AC voltage. Rated in VA (volts x amps). OHMS Law:

Example: A 24 volt, 40 VA transformer can produce how much current? Current = VA / Voltage

I = E/R R = E/I E=IxR W=ExI I = W(VA)/E

where

40 / 24 = 1.6 Amps

I = Current in Amps R = Resistance in Ohms E = Volts W = Watts or VA

RELAY CONTACTS: N/C: Normally closed connection of a relay, when not energized. N/O: Normally open connection of a relay, when not energized. Com: The common terminal for normally open and normally closed. Pole: The number of independent circuits of a switch or relay. Throw: The number of settings which a switch or relay can have.

3 4 4 6 6 5

COM N/O N/C N/C N/O COM

DPDT = Double Pole Double Throw 75

76

TACO Zone Controls Cross-Reference TACO

ARGO

ERIE

HONEYWELL

WHITE-ROGERS

SR501 SR501-845RP SR502 SR503 SR504 SR506

AR821 (1), AR822

SR100

RA89A (2), RA845A (1), RA832A (1)

889-189 (2), 829-845 (1)

SR503-EXP SR504-EXP SR506-EXP

ARM-861-DP (5,6), ARM-3P ARM-842-DP (5,6), ARM-4P ARM-866-DP (5,6), ARM-6P

SWITCHING RELAYS 1 1 2 3 4 6

Zone Zone Zone Zone Zone Zone

Switching Switching Switching Switching Switching Switching

Relay Relay Relay Relay Relay Relay

(DPDT) Replacement PC Board (DTSP) with Priority with Priority with Priority with Priority

AR-861-2 (3) AR-861-3 (3) AR-842 AR-866

SR201 SR301 SR601 SR601 (4)

R8888A1007 R8888B1005

SWITCHING RELAYS WITH POWERPORT OPTIONS 3 Zone Switching Relay with Priority and 3 Power Ports 4 Zone Switching Relay with Priority and 3 Power Ports 6 Zone Switching Relay with Priority and 3 Power Ports

ZONE VALVE CONTROLS 3 4 5 6

Zone Valve Zone Valve Zone Valve Zone Valve

Control Control with Priority Control Control with Priority

ZVC403 ZVC404 ZVC405 ZVC406

(7) (7) (7) (7)

AZ-3 AZ-4P AZ-5 AZ-6P

ZONE VALVE CONTROLS WITH POWERPORT OPTIONS 4 Zone Valve Control with Priority and 2 Power Ports 6 Zone Valve Control with Priority and 2 Power Ports

ZVC404-EXP ZVC406-EXP

PLUG IN POWERPORT CARDS Post Purge Timer Plug-In Card Priority Protection Plug-In Card Universal Timer/Pump Exercize Plug-In Card

PC600 PC605 PC610

DPM-1

R8889A1014 R8889B1012 VL500 (8) VL500 (8)

TACO Zone Controls Cross-Reference (Continued) TACO

ARGO

ERIE

PC700 PC702 PC705

DPM-2

BB1200

HAFC101 HAFC201

ARH-1, ARH-2, ARH-3

WA300

SR024-001RP SR120-001RP

R-35 R-49

EXP10

ADD-ON POWER CONTROLS Boiler Reset Control 2-Stage Boiler Reset Control Variable Speed Pump Injection Mixing Control

BB3000

FAN CONTROLS 1 Zone Hydro Air Fan Control (1 or 2 Speed) 1 Zone Hydro Air Fan Control with Time Delays (1 or 2 Speed)

REPLACEMENT PARTS 24 Volt Replacement Relay 120 Volt Replacement Relay

NOTES: 1. Does not have both normally open and normally closed contacts. 2. Has only one set of normally open contacts (SPST). 3. Does not have optional priority. 4. Can be expanded to five and six zones with the addition of EXP10 relays. 5. Argo ARM units are expandable to 10 zones using special controls (ARM-1, ARM-4) with a phone jack. TACO switching relays can be expanded up to 20 zones using any combination of -EXP models with no special connections. 6. Includes only one data port for adding data port modules. 7. All TACO zone valve controls include an extra set of dry contacts (N/O, Common, N/C). 8. VL500 is only 5 zones, 4 normal and 1 priority.

HONEYWELL

WHITE-ROGERS

77

Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Visit our web site at: http://www.taco-hvac.com

Printed in USA Copyright 2003 TACO, Inc.