Sakura Air Conditioner User-friendly, Earth-friendly

Panel (Type-B) 680×680

Panel (Type-B) 830×830

Panel (Type-A) 680×680

Panel (Type-B) 680×1240

Panel (Type-A) 680×1240

Hydronic Cassette SFP - KM - EC Series ( Technical / Installation Manual ) Ref, S- 160 / 03 / 10 (H)

The EC motor used in the VAV fan coil is a brushless direct current (DC) motor that connects directly to the 230V AC mains supply. The AC-to-DC conversion and motor commutation are integrated within the motor body and this ensures increased efficiency which provides lower running temperature and higher life expectancy than a traditional motor. EC microprocessor-based commutation also provides other features including alarm outputs and speed monitoring. EC motors typically boost motor efficiency from 45 to 80 per cent and therefore achieve lower specific fan power. However, while higher efficiency motors are available for terminal units incorporating fans, the forward curved fan impeller is not particularly efficient so the overall motor and fan efficiency is 37 per cent for EC and 21 per cent for AC (see table 1). Table 1 Motor type

Power factor

Motor Volts

135

0.85

68

0.61

V 169 (AC out) 5.8 (DC)

Air flow

Volts in

Current

Power

l/s

V

A

W

AC

320

230

0.68

EC

321

230

0.48

Specific fan power W/(l/s)

Apparent power VA

0.422

156.4

0.212

110.4

An AC motor’s speed is controlled by voltage reduction and tapped transformers are normally used to achieve this. However, this voltage reduction reduces the motor efficiency. EC motors, on the other hand, use a low voltage reference signal to provide a command to the commutation to change the speed. The control signal can be either 0 – 5VDC analogue, and motor efficiency is maintained from high speed down to low speed. Essentially, the EC motor is more efficient than the AC motor because: • • •

It does not need to induce a current in the rotor. The EC motor has a simpler winding which results in reduced copper losses losing less heat to the air. At 320l/s, AC motors will increase the air temperature by 0.345°C compared with 0.174°C for EC motors. The specific fan power of EC motors is lower and exceeds the requirements of the latest Building Regulations.

As standard, the EC motor has an input terminal for a 0 to 5Vdc signal from a building management system (BMS) controller to vary the set volume on the fan in relation to the room temperature at minimal additional cost to the BMS package.

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ENERGY SAVING EC FAN COIL UNITS We, SAKURA have incorporated an energy efficient EC fan option for most of the units in the range that significantly exceeds the current Part L Specific Fan Power (SPL) requirement of 0.8 W/l/s. The fan coils are offered with a range of accurate and cost effective speed control options providing a flexible and user-friendly facility to have full controllability with standard analogue or DDC controls. The power conversion from AC to DC is incorporated within the motor and fan assembly and allows a normal mains 230VAC supply to be used. EC MOTOR DESCRIPTION Electronically Commutated Motors (EC Motors) are a brushless DC motor and have no mechanical commutator. They use microprocessor technology to control the level of current through the windings. This electronic operation offers a significant advantage over traditional AC motors namely; high efficiency, energy savings, continuously variable speed control, compact design, long life and direct connection to AC mains. FEATURES & BENEFITS AC MAINS CONNECTION The EC Fan Coil Units connect to the AC mains in the same way as the AC motor powered units. They include a rectifier to convert AC to DC current. Harmonic filtration is also included as required to meet current regulations (‘Harmonics to Mains Supply’ regulation in EN 61000-3-2), simply connect the unit to the mains bus bar or local fused spur as usual. REDUCED POWER CONSUMPTION Typically, when a medium sized Fan Coil Unit is directly compared AC vs. DC there is a significant power saving. The DC unit had a harmonic filter fitted as recommended to comply with the regulations. On a medium speed setting the following measurements were recorded: The 57% reduction demonstrates the saving measured in Watts. Expressed as VA, a saving of 33% would be seen. A further 25-30% can be saved by employing a set back speed when duty demands are reduced. ATL236 W VA

AC 210 210

DC 90 140

REDUCTION 57% 33%

A report from a leading fan and motor company states that a significant improvement in energy reduction is achieved with the use of EC fans. Taking a typical duty of 190 l/s with an external resistance of 30 Pa the EC solution provides a power saving of 91W and reduces the Specific Fan Power (SFP) from 0.72 to 0.25 W/l/s. Fan coils are often used in office applications where they operate 12 hours a day, 3120 hours per year. Using the above energy saving of 91W, there is an annual saving of 384 kWh and 122kg of CO2. A typical installation of 500 units will save 61 tonnes of CO2 per year.

REDUCED MOTOR HEAT PICK-UP Due to the lower energy requirement and higher efficiency of EC motors the heat pick-up is significantly reduced. This reduced heat gain can be incorporated at the design stage to reduce chiller, pumps and pipe work sizes. The above medium sized unit demonstrates a saving of 120W through reduced motor heat pick-up.

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LIFE EXPECTANCY Due to the EC motors running cold and not being subject to thermal stress the life expectancy is almost twice that of an AC equivalent motor. A quality AC motor would have a life expectancy of approximately 50,000 hours, the EC versions have a life expectancy exceeding 80,000 hours, or over 20 years. SELECTION OF FAN COILS WITH EC FANS Testing of AC vs EC-DC fan coils back to back allowing for system resistances up to 30Pa external static pressure, no difference in the air volume and resultant NR level was noted. Therefore, there is no difference in the selection process between the two motor types. SPEED CONTROL WITH EC The fan speeds can be adjusted for Energy saving, low, medium and high. The fan runs at constant speed at high, medium or low speed. Energy saving mode is suggested by the manufacture. The fan speed is continuously changeable by 0-5VDC input signal. The input signal is calculated from the room temperature and setting temperature. The Fan coil unit’s air flow volume can be changeable from 15%-100%. The power consumption can be saved. THE BUILDING REGULATIONS - PART L With conventional AC motors, fan coils are typically running at a Specific Fan Power of around 0.5 - 0.8 W/l/s. Compliance with the maximum 0.8 W/l/s is dependent on the unit selection and the external static air pressure in the system. EC - DC units with the high motor efficiency and lower power consumption typically operate in the range 0.25 - 0.45 W/l/s. Being around 50% of the AC equivalent, the EC - DC fan coil fully complies with the current Building Regulations and will greatly assist in the building energy reduction calculations.

SUMMARY In Summary EC Motors offer the following: • Low energy consumption - up to 60% saving. • Flexible speed control options - easy and accurate fan speed adjustment. • Fully compliant to part L building regulations -half the Specific Fan Power of AC. • High quality long life fan and motor -life expectancy nearly twice that of AC. • Reduced motor heat pick-up - further energy saving on main plant chiller. • No special electrical requirement - units are wired to normal AC 230V mains. • EC fan coil performance as AC - simple selection process. • Set back speed offers further savings of around 25-30% - total energy saving potential exceeds 70% (W) or 50% kVA.

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DESCRIPTION OF THE UNIT CASE It is made of galvanized steel with inside and outside thermal insulation (closed cell NBRplastic foam 10 mm thick) and together with the specific flanges connects the channels to the unit for the renewal of room air and/or to send it to an adjacent room. FASTENING MOUNTING BRACKETS Power steel mounting brackets clamps for attaching the unit to the ceiling. FAN ASSEMBLY The fan assembly mounted on anti-vibrating supports is extremely quiet. The single air inlet radial fan is connected to a EC motor (standard) with single phase 230V/50Hz supply, class B insulation. HEAT EXCHANGER It is made of copper tubes and aluminum fins bonded onto the tubes for maximum transfer contact. The coils are with 2 rows for the 2-pipe and 4-pipe models. All coils are provided with air bleed pipes and water drain valves, located respectively on the highest and lowest point of the coil circulation. Air bleed valve and water drain valve are positioned near the return air grill. It is very easy to operate them. CONDENSATE COLLECTION TRAY It is made of ABS with 5mm closed cell NBR-plastic foam. AIR FILTER Synthetic washable filter, easily removable CONDENSATE PUMP It is composed of a non return valve, a float and a pump with 650 mm. max. head. ELECTRONIC BOX The electronic box can be easily accessed and contains the terminal board for the electrical connections. 1 PCB covers 2-pipe, 4-pipe, 2-pipe with EH as booster, 2-pipe with EH as primary and 4-pipe with EH as booster for PCG/PCH-R THREE OR TWO-WAY VALVES 3-way ON/OFF valve can be installed outside of case, which is easy to maintenance and replace. 2 or 3-way valves are power with 1~ 230V 50Hz. 3-way modulating valve can be installed outside of case, which is power on 230V or 24VAC.

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C A S S E T TE F A N C O IL U N ITS M O D E L A S S IG N M E N TS

SFP-KM4- 51 85 136 238

SFP-KM6-

102 170

(1) V

(2) R

(3) S

(4) 3MV2

V

R

S

3V2

P

W

K

2V2

(1) V

(2) R

(3) S

(4) 3MV2

V

R

S

3V2

P

W

K

2V2

(5) EH

(6) EC

(5) EH

(6) EC

(1 ) 2 -P IP E O R 4 P IP E

V=2-pipe unit P=4-pipe unit (2) C O N T R O L S Y S TE M

R= With electronic PCB for functioning with infrared remote control W=With pump control electronic PCB for functioning with a secondary wall-mounted thermostat or 3-speed switch supplied separately (3) P O W E R S U P P LY

S=230V/1PH/50HZ K=220V/1PH/60HZ (4) V A LV E S

3MV2= 3-way modulating valve for chilled water. 2V2 = ON/OFF 2 way valve for chilled water or hot water, which can be installed inside of unit or outside of unit 3V2 = ON/OFF 3 way valve for chilled water or hot water, which can be installed outside of unit (5) E LE C T R IC A L H E A TE R

EH=Electrical heater (6) M O TO R

EC= EC motor

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2-PIPE HYDRONIC CASSETTES SFP-KM4(6)-VS-EC SERIES

STANDARD SPECIFICATIONS Model

SFP-KM4-51-V

Nominal airflow (H / M / L) Air flow in energy saving mode Nominal cooling capacity (H / M / L)* Nominal sensible cooling capacity (H / M / L) Nominal cooling capacity in energy saving mode Nominal heating capacity (H / M / L)** Nominal Heating capacity in energy saving mode Electric Heater Capacity (Optional) Noise level (L / M / H) @ 1m Power supply

SFP-KM6-102-V

SFP-KM6-170-V

m3 / min

9.5/5.83/2.83

14.2/5.83/2.83

18.3/11.66/5.67

28.3/11.66/5.67

m3 / min

from 2.83 to 9.5

from 2.83 to 14.2

from 5.67 to 18

from 5.67/28.3

kW

3.4/2.3/1.5

4.72/2.32/1.6

5.8/4.34/2.5

8.45/4.34/2.5

kW

2.57/1.768/1.2

3.57/1.974/1.43

4.53/3.57/2.0

6.49/3.52/1.98

kW

from 1.5 to 2.57

from 1.6 to 4.72

from 2.5 to 4.53

from 2.5 to 8.45

kW

3.91/2.75/1.8

5.6/2.78/1.92

7.17/5.14/3

10.15/5.2/3

KW

from 1.8 to 3.91

from 1.92 to 5.6

from 3 to 7.17

from 3 to 10.15

kW

1.0

2.0

3.0

3.0

dB (A)

37/32/24

46/32/24

48/34/26

48/34/26

V / Ph / Hz

No. of fan Fan motor power (H/M/L) Fan motor current(H/M/L) Fan motor power(H/M/L)

SFP-KM4-85-V

running apparent

230 / 1 / 50 1

1

2

2

W

20/10.2/6.4

27.6/10.2/6.4

40/20.4/12.8

55.2/20.4/12.8

A

0.174/0.1/0.068

0.265/0.1/0.068

0.348/0.2/0.136

0.53/0.2/0.136

VA

40/23/15.64

60.95/23/15.64

80/46/31.28

121.9/46/31.28

Operation control

Remote Control Handset & Wired Wall Pad

Water flow rate(H/M/L)

L/h

601/406/265

834/424/282

1025/767/442

1470/767/441

Water drop(H/M/L)

kPa

12.8/8.7/4.0

13.2/5.3/2.6

29.3/17.6/6.6

33.4/8.7/4.0

L

1.247

1.558

2.216

2.769

pressure

Water content Cond. drain connection I.D. Dimensions

mm (in)

19.05(3/4)

L

mm

570

570

1,130

1,130

W

mm

570

570

600

600

H

mm

250

290

250

290

kg

31

33

52

59

Gross weight Panel dimension

mm

680×680×28

Connection method Water connection

680×1240×28 Socket(Threaded Female)

In

mm (in)

19.05(3/4)

O ut

mm (in)

19.05(3/4)

09 V.1.2 o

o

o

o

*Cooling : 27 C db/19 C wb entering air temperature, 7 C entering water and 12 C leaving water temperature. **Heating : 20oC db entering air temperature, 50oC entering water temperature with water flow rates same as for the cooling test. ***Heating capacity: 20oC db entering air temperature, 70oC entering water temperature, 60oC leaving water temperature.

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2-PIPE HYDRONIC CASSETTES STANDARD SPECIFICATIONS

SFP-KM4-VS-EC SERIES

Model

SFP-KM4-136-V

SFP-KM4-170-V

Nominal airflow (H / M / L)

m3 / min

22.5/11.67/3.5

38.17/22.33/12.6

Air flow in energy saving mode

m3 / min

from 3.3 to 22.5

from 12 to 38.17

kW

7.62/3.62/2.2

11.7/7.83/4.3

kW

5.03/2.96/1.9

8.86/6.45/4.0

kW

from 2 to 7.62

from 3.8 to 11.7

kW

8.3/4.5/2.64

12.72/8.6/5.1

kW

from 2.3 to 8.3

from 4 to 12.72

kW

3.0

4.0

dB (A)

50/36/26

54/39/30

W

51.5/14.4/6.2

80/51/35

A

0.465/0.139/0.064

0.731/0.443/0.313

VA

106.9/32/14.72

168/102/72

Nominal cooling capacity (H / M / L )* Nominal sensible cooling capacity (H/ M/ L ) Cooling capacity in energy saving mode Nominal heating capacity (H / M / L )** Heating capacity in energy saving mode Electric Heater Capacity (Optional) Noise level (L/ M/ H) @ 1m Power supply

V / Ph / Hz

Fan motor power(/H/M/L) Fan motor running current (H/M/L) Fan motor apparent power (H/M/L) Operation control

Remote Control Handset & Wired Wall Pad

Water flow rate(H/M/L)

L/h

1347/640/389

2073/1384/760

Water pressure drop(H/M/L)

kPa

36.9/9.1/4

41.7/23/11

L

1.779

2.407

Water content Cond. drain connection I.D.

Dimensions

mm (in) L

mm

730

835

W

mm

730

835

H

mm

290

290

kg

40

55

mm

830×830×28

980×980×28

Gross weight Panel dimension Connection method Water connection

Socket(Threaded Female)

In

mm (in)

19.05(3/4)

Out

mm (in)

19.05(3/4)

*Cooling : 27oC db/19oC wb entering air temperature, 7oC entering water and 12oC leaving water. **Heating : 20oC db entering air temperature, 50oC entering water temperature with water flow rates same as for the cooling test.

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4-PIPE HYDRONIC CASSETTES SFP-KM4(6) – PS-EC SERIES

STANDARD SPECIFICATIONS Model

SFP-KM4-85-P

3

SFP-KM6-102-P

SFP-KM6-170-P

Nominal airflow (H / M / L)

m / min

14.2/5.83/2.83

18.3/11.66/5.67

28.3/11.66/5.67

Air flow in energy saving mode

m3 / min

from 2.83 to 14.2

from 5.67 to 18.3

from 5.67/28.3

kW

3.6/1.64/1.2

4.15/2.78/1.62

5.98/3.22/1.8

kW

2.94/1.416/1.11

3.82/2.72/1.58

4.85/2.82/1.67

KW

from 1.2 to 3.6

from 1.4 to 3.82

from 1.5 to 5.98

kW

4.43/2.2/1.2

6.67/5.1/2.56

7.91/5.1/2.56

kW

from 1.2 to 4.43

from 2.3 to 6.67

from 2.3 to 7.91

dB (A) V / Ph / Hz

46/32/24

39/34/26

48/34/26

Fan motor power (H/M/L)

W

27.6/10.2/6.4

40/20.4/12.8

55.2/20.4/12.8

Fan motor running current

A

0.265/0.1/0.068

0.348/0.2/0.136

0.53/0.2/0.136

Fan motor apparent power

VA

60.95/23/15.64

80/46/31.28

121.9/46/31.28

Cooling water flow rate(H/M/L)

L/h

636/289/211

733/491/286

1057/569/318

Heating water flow rate(H/M/L)

L/h

380/188/103

571/437/220

678/437/220

Cooling waterr pressure drop(H/M/L)

kPa

14.7/3/2

27.8/15.6/6.0

28.9/10/6

Heating water pressure drop

kPa

2.3/1.6/0.9

8.7/7/3.8

17.5/7/3.8

Cooling water content

L

1.072

1.359

1.913

Heating water content

L

0.487

0.857

0.857

Nominal cooling capacity (H / M / L)* Nominal sensible cooling capacity (H / M / L) Nominal cooling capacity in energy saving mode Nominal heating capacity (H / M / L)** Nominal heating capacity in energy saving mode Noise level (L / M / H) @ 1m Power supply No. of fan

230 / 1 / 50 1

Operation control

2

2

Remote Control Handset & Wired Wall Pad

Cond. drain connection I.D.

mm (in)

19.05(3/4)

L

mm

570

1,130

1,130

W

mm

570

600

600

H

mm

290

250

290

Panel dimension

mm

680×680×28

Gross weight

kg

33

Dimensions

Connection method Water connection

680×1240×28 52

59

Socket(Threaded Female) In

mm (in)

19.05(3/4)

Out

mm (in)

19.05(3/4)

*Cooling : 27°C db/19°C wb entering air temperature,7°C entering water and 12°C leaving water. **Heating : 20°C db entering air temperature ,70°C entering water temperature and 60°C leaving water temperature.

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4-PIPE HYDRONIC CASSETTES SFP-KM4- PS-EC SERIES

STANDARD SPECIFICATIONS Model

SFP-KM4-136-P

SFP-KM4-170-P

Nominal airflow (H / M / L)

m3 / min

22.5/11.67/3.5

38.17/22.33/12.6

Air flow in energy saving mode

m3 / min

from 3.3 to 22.5

from 12 to 38.17

kW

5.5/3.18/1.4

7.92/5.34/2.9

kW

4.69/2.76/1.3

6.96/5.2/2.6

kW

from 1.3 to 5.5

from 2.4 to 7.92

kW

5.3/3.59/1.8

9.65/7.56/4.3

kW

from 1.6 to 5.3

from 4 to 9.65

Noise level (L / M / H) @ 1m

dB (A)

50/36/26

54/39/30

Power supply

V / Ph / Hz 1

1

Nominal cooling capacity (H / M / L)* Nominal sensible cooling capacity (H / M / L) Cooling capacity in energy saving mode Nominal heating capacity (H / M / L)** Heating capacity in energy saving mode

Number of fan Fan motor power(H/M/L)

W

51.5/14.4/6.2

80/51/35

Fan motor running current

A

0.465/0.139/0.064

0.731/0.443/0.313

Fan motor apparent power

VA

106.9/32/14.72

168/102/72

Cooling water flow rate(H/M/L)

L/h

973.8/562/247.4

1400/944/512.7

Heating water flow rate(H/M/L)

L/h

454/307/154

827/648/368.6

Cooling waterr pressure drop(H/M/L)

kPa

49/14.2/3

26.9/13.2/6

Heating waterpressure drop(H/M/L)

kPa

8.3/4.1/2

13.3/8.6/4

Cooling water content

L

1.37

1.665

Heating water content

L

0.408

0.742

Operation control

Cond. drain connection I.D. Dimensions

mm (in) L

mm

730

835

W

mm

730

835

H

mm

290

290

mm

830×830×28

980×980×28

kg

40

55

Panel dimension Gross weight Connection method Water connection

In

mm (in)

Out

mm (in)

*Cooling : 27°C db/19°C wb entering air temperature,7°C entering water and 12°C leaving water. **Heating : 20°C db entering air temperature ,70°C entering water temperature and 60°C leaving water temperature.

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THE INSTALLATION MANUAL HOT & CHILLED WATER SYSTEM AIR CONDITIONERS First check the contents of the package. FACTORY SUPPLIED ACCESSORIES Check to ensure all factory supplied accessories are supplied with the unit. FACTORY SUPPLIED ACCESSORIES LCD Remote control Installation manual (optional) Batteries External drain pan

AMOUNT 1 1 2 1

The appliance should be Installed In accordance with national wiring regulation. SAFETY CONSIDERATIONS • • •

When working on air conditioning equipment, observe precautions in this manual. Follow all safety codes and other safety precautions that may apply. Installing and servicing air conditioning equipment should be done by trained and qualified service personnel only. Untrained personnel can perform only basic mainte nance functions such as cleaning coils, filters and replacing filters. Ensure that the electrical supply and frequency are adequate for the operating current required for this specific installation.

WARNING -Before any service or maintenance operations turn off the main power switch. • •

The manufacturer denies any responsibi lity and warranty shall be void if these installation instructions are not observed. Never switch off the power main supply when unit is operating in the cooling cycle. To switch off the fan coil unit use only the ON-OFF button. This avoids over-flow in the drain pan, by allowing the pump to drain any condensate water due to regulating valve losses when chiller is working.

OPERATING LIMITS •

Power supply Volt 230

•

Phase 1

Hz 50

Water circuit -Minimum entering water temperature: +2 °C -Maximum entering water temperature: +70 °C -Water side maximum pressure: 1600 kPa

BEFORE INSTALLATION

The installation site must be establis hed by the system designer or otherqualified professional, taking account into the technical requisites andcurrent standards and legislation. FP- fan coils must be installed by an authorized company only. FP-fan coils are designed for installation in a false ceiling, for intake of fresh air from outside and for deviation of a small part of the treated air for discharge in a neighboring room.

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They must be installed in such a way as to enable treate d air to circulate throughout the room and in respect of the minimum required for technical maintenance operations. • • • • •

It is advisable to place the unit close to the insta llation site without removing it from the packaging. Do not put heavy tools or weights on the packaging. Upon receipt, the unit and the packaging must be checked for damage sustained in transit and if necessary, a damage claim must be filed with the shipping company. Check immediately for installation accessories inside the packaging. Do not lift unit by the condensate drain discharge pipe or by the water connections; lift it by the four corners.(Fig.1) Check and note the unit serial number.

Fig.1

Fig.2 Cove r

SELECT LOCATION • • • •

•

Do not install the unit in rooms where flammable gas or alkaline acid substances are present. Aluminum/copper coils and/or internal plastic components can be damaged irreparably. Do not install in workshops or kitchens; oil vapors draw n in by treated air might deposit on the coils and alter their performance or damage the internal plastic parts of the unit. Installation of the unit will be facilitated by using astacker and inserting a plywood sheet between the unit and the elevated stacker.(Fig.2) It is recommended to position the unit as centrally as possible in the room to ensure optimum air distribution. (Fig.3) Generally the best louver position is the one which allows air diffusion along the ceiling. Alternatively intermediate positions can be selected. Check that it is possible to remove panels from ceiling in the selected position, to allow enough clearance for maintenance and servicing operations.

Fig.3

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INSTALLATION LOCATION Install the unit in a position: • • • •

Having sufficient strength to carry the weight of the unit. Where the inlet and outlet grilles are not obstructed and the conditioned air is able to blow all over the room. From where condensate can be easily run to drain. Check the distance between the upper slab and false ceiling to ensure the unit will suit the distance. See Fig.4

B A

Fig.4 Model SFP-KM4-51 FP-KM4-102 SFP-KM4-85/136/238 SFP-KM6-170

A(mm) 250

B(MM) 10 or more

290

10 or more

Fig.5

•

Ensure there is sufficient space around the unit to service it. See Fig.5

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INSTALLATION METHOD Cassette Unit • Using the installation template open ceiling panels and install the suspension bolts as in Fig.6 below

590×590: Dimensions for opening 616X280: Suspension Bolts FP-KM4-85

0

0

MODELS

control box

mounting brackets 8 0

880× 880: Dimensions for opening 395× 880: Suspension Bolts

750×750: Dimensions for opening 440×776: Suspension Bolts MODELS FP-KM4-136

MODELS

SFP-KM4-238

Fig. 6 Opening Dimensions and Positions for Suspension Bolts • •

Mark position of suspension rods, water lines and condensate drain pipe, power supply cables and remote control cable. Supporting rods can be fixed, depending on the type of ceiling, as shown in Fig. 7 and Fig.8. Fit suspension brackets supplied with the unit to the threaded rods (Fig.9).

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Do not tighten nuts and counter nuts; this operation has to be done only after final leveling of the unit, when all the connections have been completed.

Fig.7

Fif.8

NUT Nut

Washer Rod

Counternut

Fig.9 • • • • •

• • •

Ensure the ceiling is horizontally level, otherwise condensate water cannot drain. The casing is fixed to the slab with 4 drop rods. The rods should have two nuts and washers to lock the unit in position. The Cassette brackets will then hook over the washers. When lifting the Cassette into position care should be taken not to lift the unit by the drip tray, which could be damaged. Lift unit (without the air panel) with care by its four corners only. Do not lift unit by the condensate drain discharge pipe or by the piping connections. Incline unit (Fig.10, Fig.11, Fig.13, Fig.14) and insert it into the false ceiling. Insert the rods into the bracket slot. With minimum height (see table) false ceilings, it might be necessary to remove some T brackets of the false ceiling temporarily. Using a level guide, line up the unit with a spirit level, and keep dimension between the body and the lower part of the false ceiling (Fig.12 Fig.15). Line up the unit to the supporting bars of the false ceiling tightening the nuts and counter nuts of the threaded rods. After connection of the condensate drain piping and piping connections, check again that the unit is level.

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Fig.10

Fig.11

Fig.12

MODEL A (mm.)

• • •

SFP-KM4 3

The spaces between the unit and ceiling can now be adjusted. Use the drop rods to make the adjustment. Check to ensure the unit is level. The drain will then automatically be lower than the rest of the drip tray. Tighten the nuts on the suspended rods.

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DRAIN PIPE WORK Indoor Unit • The unit is fitted with a condensate pump with a 500 mm. lift. • The unit is provided with 22 mm. bore flexible hose 300 mm. long. • The flexible hose should be fitted into a 22 mm O/S Φ. polyvinyl tube and sealed. The drain must be installed with a downward slope. • On completion the drain line should be insulated.

Fig.16

WATER CONNECTIONS • • •

Water connections are fixed to the unit body to avoid breaks when pipes are connected to valve assemblies; it is advisable to tighten the connection with a spanner. The upper coil connection is supplied with air purge screw, the lower connection with water purge screw, suitable for 8mm. wrench or screw-driver. Coil is partially drainable; it is advisable to blow air into the coil for complete drainage.

EXTENDED DRAIN PAN ACCESSORY

INSTALLATION PROCEDURES • • •

Align the two (2) screw holes in the fixing plate to the two (2) holes in the external drain pan. Make sure the drain pan is horizontal. Tighten the two screws and making sure the external drain pan is installed flush with the fixing plate.

When the installation is completed, it is necessary to wrap connecting pipe with insulation to prevent leakage to ceiling tile. SAKURA - Total Air Conditioning Solution

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INTER CONNECTING WIRING We recommend that screened cable be used in electrically noisy areas. 1. Always separate low voltage (5VDC) signal wires from power line (230 VAC) to avoid electro-magnetic disturbance of control system. 2. Do not install the unit where electromagnetic waves are directly radiated at the infra red receiver on the unit. 3. Install the unit and components as far away as is practical (at least 5 meters) from the electromagnetic wave source. 4. Where electromagnetic waves exist use shielded sensor cable. 5. Install a noise filter if any harmful noise exists in the power supply.

TERMINAL BLOCK SFPKM4-34/51/68/80

TERMINAL BLOCK SFPKM4-85-102/136/170/204/238

MOUNTING FRONT PANEL ASSEMBLY • • •

Remove return grille from front panel. Move the front panel to casing. Tighten 4 screws as shown in Fig 17,18

Fig 17

Fig 18

FILTER REMOVAL

• •

Unlock the two fasteners on the front panel. Open the grille downward with care.

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17

• •

Pull the filter out along the slot. Clean the filter and reassemble.

Fig.19

PRELIMINARY CHECKS BEFORE START-UP • • • • •

The unit should not be started up until the system piping has been cleaned and all the air has been purged. Check condensate drain pipe slope. Make sure that air filter is clean and properly installed. Ensure that voltage and current values correspond with the unit nameplate values; check electrical connections. Verify that air outlets are not closed.

MAINTENANCE • • •

Before performing any service or maintenance operations, turn off the main power switch. The air filter is made of acrylic fiber and is washable in water. To remove filter simply open the intake grille by releasing the two catches. See Fig.19 and the section filter removal. Check the filter periodically and before the operating season; clean or replace as necessary.

PROLONGED UNIT SHUT-DOWN • • •

Prior to restarting the unit: Clean or replace the air filters. Check and remove any obstruction from the external drain pan and the internal drain pan.

EXTRA MAINTENANCE • • •

The electrical panel is easily accessible by removing the cover panel. The inspection or replacement of internal components such as; heat exchanger coil, condensate Drain pump, float switch, involves the removal of the condensate drain pan. See Fig.20-25. During the removal of the condensate drain pan protect the floor under the unit with a plastic sheet from condensate water that could be spilled.

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•

Remove fixing screws of the drain pan fixture and remove condensate drain pan with care.

The appliance are intended to be maintained by qualified service personnel and located at a level not less than 2.5m.

Fig.20

Fig.21

Fan

Fan blower Removal

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19

Fig.22 Coil Drain Pan Drain Pan Fixture

Condensate Drain Pan Removal

FRESH AIR RENEWAL AND BRANCHDUCT . • • •

The side opening allows separate ductwork to be installed for outside air intake and branch ducting. See Fig.26 Cut and remove anti-condensate insulating material. Install your flanges and conduits to casing. Conduit can be flexible polyester with spring core or corrugated aluminium externally coated (dia.4 in.) with anti-condensate material (fiberglass 12-25 mm thickness). Fresh Air Flange and Duct

Fig. 26 Branch Air Flange and Duct

Fresh air - There is one (1) opening for connecting a fresh air duct for SFP-34-04-06-08, and for FP-85-10-12-16-18-20. There are two (2) openings for connecting fresh air ducts for SPCE-09-10-12-16. Order flanges (spigots) and blanking plates as accessories separately.

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NOTE: -

Branch duct flange (Optional part) Fresh air duct flange (Optional part) Blanking plate (Optional part)

M O D EL SFPKM4-51 SFPKM4-85 SFPKM4-136 SFPKM4-238

L 570 570 730 860

S 570 570 730 860

H1 278 318 318 318

H2 125 145 145 145

H3 148 188 188 188

H4 183 223 223 223

Branch Duct and Fresh Air Duct Installation

F P -K M 4

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H5 205 245 245 245

BRANCH DUCT DIMENSION

FRESH AIR DIMENSION

BRANCH DUCT

MODEL

Dia(mm)

SFP P--51--80 SFP P-136-170-238

100 100

QTY

2 2

FRESH AIR

Dia.(mm)

100 100

QTY

1 1

B R A N C H D U C T A N D F R E S H A I R D U C T P O S I TI O N S

1. Look for the yellow sticker on the casing for location of branch duct or fresh air intake connections. STICKER

Step 1

2. The sticker is at the center of a knock out hole underneath the casing insulation. Use a cutter and follow along the pre-cut circular marking as shown and trim off the insulation.

Step 2

3. Knock out the pre-cut hole. 4. Connect the flange on to the opening with Φ 3 mm. x 12 mm. tapping screws. Step 3

Step 4

Tapping Screw Dia 3 mm.x12 mm.l.

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FP-KM4 MIMENSIONAL DRAWINGS SFP-KM4-51-VS

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23

SFP-KM4-85-VS

air vent

318

outlet inlet water vent

control box

mounting blackets

160

fresh air duct

fan blower

motor

SAKURA - Total Air Conditioning Solution

24

drainage

SFP-KM4-136-VS

panel cover

×

air vent

outlet inlet water vent

branch duct

control box

mounting brackets

160

fresh air duct

motor

SAKURA - Total Air Conditioning Solution

fan blower

25

Drainage

SFP-KM4-238-VS

panel cover

air vent outlet inlet water vent

control box

mounting brackets

fresh air duct

fan blower

SAKURA - Total Air Conditioning Solution

motor

26

drainage

SFP-KM4-85-VS 1-Mounting brackets 2-External drain pan 3-Load bearing structure 4-Control box 4-1- Main PCB 4-2-Transformer 4-3-Terminal block 4-4-Remote handset 4-5-Wire clip 5-Branch duct 6-Fan motor 6-1- motor capacitor 7- Fresh air outlet 8-Fan blower 9-Drain pump assembly 9-1- Drain pump fixture 9-2- Drain pump 9-3-Drainage tube 9-4- Float switch 10-Heat exchanger 11-Drain pan 12-Drain pan fixture 13-Venturi 14-Shield 15-Air filter 16-Cover panel 16-0- Receiver display 16-1-Receiver label sticker 16-2-Grille 16-3-Bolt（Left） 16-4-Bolt（Right） 16-5-Louver 16-6-Stepping motor 16-7-Fan bearing 17- Wire wall pad

SAKURA - Total Air Conditioning Solution

27

SFP-KM4-136-VS

SAKURA - Total Air Conditioning Solution

1-Mounting brackets 2-External drain pan 3- Load bearing structure 4- Outside control box 4-1-Terminal Block 4-2-Invert board 4-3-Wire clip 5-Branch duct 6-Fresh air outlet 7-Fan motor 7-1-Fan motor capacitor 8-Fan blower 9-Drain pump assembly 9-1- Pump fixture 9-2-Drain pump 9-3-Drainage tube 9-4-Float switch 10-Heat exchanger 11-Drain pan 12-Venturi 13-Inside control box 13-1-Transformer 13-2-Main PCB 13-3- Remote handset 14-Inside control box cover 15- Shield 16-Air filter 17-Panel 17-0- Receiver display 17-1-Receiver label sticker 17-2-Grille 17-3-Bolt（Left） 17-4-Bolt（Right） 17-5-Louver 17-6-Stepping motor 17-7-Fan bearing 18- Wire wall pad

28

SFP-KM4-238-VS

SAKURA - Total Air Conditioning Solution

1-Mounting brackets 2-External drain pan 3- Load bearing structure 4- Outside control box 4-1-Terminal Block 4-2-Invert board 4-3-Wire clip 5-Branch duct 6-Fresh air outlet 7-Fan motor （for FP-170-18-20） 7-Fan motor （for FP-170-18-20） 7-Fan motor （for FP-170-18-20） 7-1-fan motor capacitor（for FP-170-18-20） 8-Fan blower（for FP-170） 8-Fan blower（for FP-204-20） 9--Drain pump assembly 9-1- Pump fixture 9-2-Drain pump 9-3-Drainage tube 9-4-Float switch 10-Heat exchanger 11-Drain pan 12-Venturi 13-Inside control box 13-1-Transformer 13-2-Main PCB 13-3- Remote handset 14-Inside control box cover 15- Shield 16-Air filter 17-Panel 17-0- Receiver display 17-1-Receiver label sticker 17-2-Grille 17-3-Bolt（Left） 17-4-Bolt（Right） 17-5-Louver 17-6-Stepping motor 17-7-Fan bearing 18- Wire wall pad

29

REMOTE CONTROL HANDSET Transmission source used for sending control signal to the air-conditioning unit

Sleep Button Sleep mode will automatically adjust temperature and save energy when you are sleeping.

LCD DISPLAY

MODE Button Press button to select Auto mode 、Cool、Dehumidify、 Fan or Heat.

Up Button Press button to increas temperature 1℃ step.(Max:30℃) Down button Press button to decrease temperature 1℃ step. (min:16℃)

℃

A

A AM PM

Swing Button Air distributor in all mode. ON/OFF Button Press this button will turn the air-conditioning unit on or off. Note: ON/OFF button will not work when continuous daily operation is set.

AM PM

Mode

Time-on

Swing Fan speed Reset

Fan Button Press button to select low 、medium、high or Auto speed.

Network Button You can set all parameters on master unit. Then press the button for 3s ,network icon will appear. All parameters have been sent to slave units.

Timer-on Button Press the button once ,the timer-on icon will blink. Then press TIMER button to set timer-on time by 10 minutes step. Press the button again, timer-on is set. Press the button again ,timer-on mode is cancelled.

Network

Time-off Timer-Set

Clock

Bettery

Timer-off Button Press the button once ,the timer-off icon will blink. Then you press TIMER button to set timer-off time by 10 minutes step. Press the button again, timer-off is set. Press the button again ,timer-off mode is cancelled.

RESET Button Press button to restart remote

r e e h s l t.i c.o rf ynnaf Coaeo . prr r so pr oa if ae fe s m pf ii n opfn od tao tlt -t tlr ld ul euin bi mbwa twienn enth oo So - dtcr ecnsie mias m ei ienel Tl orct c-pye sy rncl. sC ee e,m ,cf rs ihsyf P3 tT3Co

Clock Button When you change the batteries,you must reset the clock time. After you install the new batteries ,the clock time will blink.Then press the clock button ,the clock time will not blink.Press Timer-set button to increase the time by 1 minute step.At last press the clock button again.

Timer-setting Button When you set the time clock ,press button to increase in 1 minute steps. When you set the timer-on and timer-off,press button to increase by 10 minutes step.

LCD DISPLAY Dehumidify

Fan

Set temperature

Heating

Auto Cooling

Signal sending Swing Network

Fan speed Auto Low-Med-High

A

Sleep

AM PM

Timer-on

SAKURA - Total Air Conditioning Solution

℃

A

AM PM Arrow direction is shown from the first function to the second function.

30

Cycle timer-on and timer-off

Timer-off

Clock icon

WALL PAD (OPTIONAL) 1--ON/OFF Button Press the button, the unit will be turned on or off. 2--LED signal 3--Room temperature Sensor 4--Real time o'clock 5--Unit Number No.00 is the master unit. You can set slave units(No.01--31) parametres on the master wall pad. 6--Mode: Auto,Cool, Dehumidification, Ventilation and Heat Auto mode Dehumidification

Cycle Timer

Timer ON

Timer OFF

h

9--Error Mark 01_ Room temperature sensor is damaged; 02_ Drainage system is damaged; 03_ Coil temperature sensor is damaged; 04_ Auto restart function is damaged. 05_ Outdoor coil temperature sensor is damaged; 06_ High or low pressure switch is opened; 08_ The unit is shortage of refrigerant. 10--Error Alarm 11--Room temperature 12--Setting temperature

℃

13----Fan Speed Icon: Auto,Low,Medium and High 14----Sleep Mode Icon 15----Louver Swing Icon 16----Communication Icon 17----Connecttion check Icon 18----Mode Select Button Press the button to select Auto, cool, dehumidification, ventilation or heat mode. 19----Fan Speed Select Button Press the button to select Auto,low,medium or high speed. 20----Sleep Mode Button. It will automatically adjust temperature and save energy when you are sleeping in cool mode or heat mode. If the wall pad is the master,press it for 3s,commumication icon appears, you can select slave unit from 1 to 31 by pressing Time up or down button,all parameters appear on the wall pad will be sent to unit you selcted or all slave units when you press Enter Button.

ENTER

FOR SETTING MASTER-SLAVE UNIT USING WALL PAD 1.Please see the back of wall pad. The unit No. can be set using dip switchs.

dip switches

Heat mode

7--Setting Time 8--Timer ON and OFF

AM/PM

UNIT NO.

Cool mode Ventilation mode

UNIT NO.

dip switches

UNIT NO.

dip switches

UNIT NO.

dip switches

21----Timer ON/OFF Button 1) Press TIMER button, or appears in LCD; 2) Press TIME (up) or (down) to select TIMER ON or TIMER OFF or SET; 3) If TIMER ON or TIMER OFF is selected. "h" and or blink in LCD; Press the TIMER(up) or (down) to set time by 10 minutes step; Press the TIMER button to confirm it. Repeat step 2) and 3) to set TIMER OFF or ON; 4) After setting TIMER ON and OFF, Press the TIME (up) or (down). When and SET appear in LCD, then press TIMER button to confirm it. , and appear in LCD at the same time. Then press ENTER button to confirm it. 5) When you cancel cycle timer on and off, press TIMER button for 30s. disappears in LCD. When you cancel timer on or/and off, press TIMER button first, then press the TIME (up) or (down) to select SET only in LCD. Press the TIMER button again, then cancel timer on or/and off. 22----Clock Button Press it first, then press Time up or down button to set real time o'clock 23----Enter Button In order to avoid misoperation ,all setting(except ON/OFF Button)is valid after pressing the button. 24----Time up/down Press Timer ON/OFF Button or Clock Button first,then press it to set timer time or clock time 25----Swing Button, 26----Temperature Up/Down Button Press Up Button to increase temperature 1 ℃ step (MAX:30℃) Press Down Button to decrease temperature 1 ℃ step (MIN:16℃)

Remark: 1) Error mark from 01 to 04 is for water cassette fan coil unit: 2) Error mark 01 and 03 and 04 are for High wall fan coil unit. 3) Error mark from 01 to 08 is for DX cassette.

SAKURA - Total Air Conditioning Solution

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step moter1~2

step moter3~4

cooling value FLOAT

BLACK

FLOAT

YELLOW

VALVE2

YELLOW WHITE

VALVE1

N

BLACK

BLUE

32 PUMP

RED BLACK

EC moter

L

RED

WP

EC moter

heating value

M

N-WP

EH

JP3

AUX2

JP4

EH

JP5

AUX1

JP6

BLDC

AUX1

JP7

BLDC

Power-out

EXV1电子调节阀

CN1~4

CN5

DIP7~12 3 4 5 6 ON

wall pad

2

CPU

1

CN7 CN6

6

CN8

5

room temperature cool pipe temperature hot pipe temperature

4

CN9

3

remote receiver display

pump electrical heating 30A

JP2

BLACK/2.5

float control switch for pump

PR/O

temperature control switch for electrical heater

JP1

Z1 DIP1- used to set master unit or slave unitDIP2-6 are used to set the unit's address TERMINAL DIP7-used to set 2-pipe or 4-pipe,which is off for 4-pipe. DIP8is off,DIP9 is off cool-heat DIP8 is off,DIP9 is on cool -heat+booster heater DIP8 is on,DIP9 is off cooling only DIP8 is on,DIP9 is on cooling+primary heat DIP10---off is without MTV,on is with MTV DIP11---- is used to set the preheat temperature DIP12---- is used to set the program of fan L \N----Power supply VALVE1----2-way valve VALVE2----2-way valve(Hot water) WP----Drainage pump BLDC----Brushless direct current moter AUX1----In cooling model,it is shut. AUX2----In heating model, it is shut. ON/OFF----Unit is open,it is shut. CN1~4----Stepping motor CN5----Wall pad CN6----Hot pipe coil TEMP. sensor CN7----Indoor coil TEMP. sensor CN8----Room TEMP. sensor CN9----Remote receiver L

N

G

A1

A1

A2

A2

1 2

DIP1~6 ON

SAKURA - Total Air Conditioning Solution L-EH Electrical heater

N ON

AUX2 ON

PR/O

WHITE/2.5

T

2 DIP switches are used for hardware configuration as follow. DIP1 used for master slave address setting. DIP switch address setting: 1 for ON, 0 for OFF. SW6 1 0 -

SW5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

SW4 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1

SW3 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1

SW2 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1

SW1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

Unit No. 01 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Remark Master Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave Slave

DIP2 used for model configuration as follow:DIP switch setting: 1 for ON, 0 for OFF.

SW1 0 0 0 1 1 SW4 0 1

SW2 0 0 1 1 1

SW3 0 1 1 0 1

Model setting 2-pipe without EH 2-pipe with EH as booster 2-pipe with EH as primary 4-pipe without EH 4-pipe with EH as primary

MTV setting [applicable to 2 pipes system only] Without motorized valve With motorized valve

SAKURA - Total Air Conditioning Solution

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SW5 0 1

Preheat setting 28C 36C

SW6 0 1

PR-O contact setting Economy contact Window contact

SW7 0 1

RS485 termination setting Other than below Last unit on RS485 communication bus

SW8

Reserved

ABBREVIATIONS Ts = Setting temperature Tr = Room air temperature sensor Ti1 = Indoor coil temperature sensor of chilled water for 4-pipe unit. Indoor coil temperature sensor for 2-pipe unit Ti2 = Indoor coil temperature sensor of hot water for 4-pipe unit. Aux = Auxiliary contact Valve1 = On/off Motorized valve for chilled water Valve2 = On/off Motorized valve for hot water M-valve=Modulating valve for chilled water 1

CONTROL SPECIFICATION 1.1 AIR CONDITIONER ON/OFF There are 3 ways to turn the system on or off: a) By the ON/OFF button on the handset or wired wall pad or remote ON/OFF; b) By the programmable timer on the handset or wired wall pad. c) By the manual control button on the air conditioner. 1.2 POWER ON SETTING a) When the power on signal is received by the air conditioner, the Mode, Fan Speed, Setting temperature and Swing setting will be the same as the handset setting before the last power off. b) When the power on signal is received by the air conditioner, the Mode, Fan Speed, Setting temperature, Swing setting and Timer ON/OFF weekly program will be the same as wall pad setting before the last power off. 1.3 MASTER-SLAVE UNIT FUNCTION The control PCB can be set either as a master unit or slave unit. a) MASTER UNIT FUNCTION 1) The master unit sends data on its setting to the slave unit. 2) The master unit settings are Unit ON/OFF, Mode, Fan Speed, Set Temperature, Swing Function, and Sleep Function for handset operation. 3) The master unit settings are Unit ON/OFF, Mode, Fan Speed, Set Temperature, Swing Function, Sleep Function and Weekly Timer ON/OFF program for wall pad operation b) SLAVE UNIT FUNCTION 1) The slave unit receives data on its settings from the master unit. 2) The slave unit is allowed to change to a locally desired setting by local controller as long as there are no subsequent changes to the settings of the master unit.

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3) 4)

c)

The slave units can be set individually for timer on and off function by handset or wall pad. The handset cannot override wall pad timer and clock setting. When unit is power on, buzzer responds as below: With MTV: The master unit will beep 3 times, and the slave unit will beep once. Without MTV: The master unit will beep 4 times, and the slave unit will beep twice.

MASTER-SLAVE CONFIGURATION Master unit: close SW6 of DIP1 before power on. Master will beep twice to the LCD wireless handset or LCD wall pad confirming receipt of commands. Each master can command up to 31 slave units.

ROUTER [1 up to 8] is needed to group a maximum of 1 up to 8 ROUTER x 256 fan coils = 8 up to 2048 units to a computer based control system. Slave unit: open SW6 of DIP1 before power on. Slave unit will beep once to the LCD wireless handset or LCD wall pad confirming receipt of commands. SW7 of DIP2 must be shorted for last slave unit on RS485 bus. d)

MASTER-SLAVE COMMUNICATION METHOD There are two modes for Master-slave structure. Broadcasting communication Master will broadcast the settings to all slave units. During normal operation, slave units can receive commands from its wireless handset and wall pad control panel. Upon reception of master global commands, all slave unit settings will be replaced by the master settings. Point to point communication Master controller could be a LCD wall pad or a host computer control system. Slave units can set its parameters as usual. Upon received the control commands from a master, the addressed slave unit settings will be replaced by the master settings. If master unit is equipped with wireless LCD handset only, it can only use broadcasting communication method. If it is equipped with LCD wall pad, it can use both communication methods.

e)

2

HOST COMPUTER CONTROL SYSTEM A number of master units can be grouped together via router to form a bigger network size [maximum 2048 fan coil units] to be controlled by a host computer. Use a data communication cable to connect router or PCB RS485 port to the computer RS485 port, or use COM to RS485 converter if your computer does not have an RS485 port. Host computer can monitor and control every single unit such as on/off, mode, set temperature, swing, sleep, fan speed, and timer ON/OFF weekly program.

2-PIPES SYSTEM 2.1 With Motorized Valve COOL MODE 1) MTV2, AUX1 and heater always off. 2) If Tr >= Ts+1ºC (or +4 ºC if economy contact is activated), cool operation is activated, MTV1 and AUX2 are turned on. Indoor fan runs at set speed. 3) If Tr < Ts, cool operation is terminated, MTV1 and AUX2 are turned off. Indoor fan runs at set speed. 4) The range of Ts is 16-30 ºC 5) Indoor fan speed can be adjusted for low, medium, high and auto. 6) When turned on, MTV1 requires 30 seconds before it is fully open. 7) When turned off, MTV1 requires 120 seconds before it is fully closed. 8) When the unit is turned off, indoor fan will delay for 5 seconds before it is turned off. LOW TEMPERATURE PROTECTION OF INDOOR COIL 1) If Ti1 ≦ 2 ºC for 2 minutes, MTV1 and AUX2 are turned off. If indoor fan is set for low speed, it will run at medium speed. If it is set at medium or high speed, it will keep running at the same speed. 2) If Ti1 ≧ 5ºC for 2 minutes, MTV1 and AUX2 are turned on. Indoor fun runs at set speed.

1) 2)

FAN MODE Indoor fan runs at the set speed while heater, MTV1, MTV2, AUX1 and AUX2 are turned off. Indoor fan speed can be adjusted for low, medium and high.

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HEAT MODE i. HEAT MODE--- WITHOUT ELECTRICAL HEATER 1) MTV2, AUX2 and heater always off. 2) If Tr Ts, heat operation is terminated, MTV1 and AUX1 are turned off. Indoor fan repeatedly runs at low fan speed for 30 seconds and stops for 3 minutes. 4) The range of Ts is 16~30 ºC。 5) Indoor fan speed can be adjusted for low, medium, high and auto. 6) MTV1 will delay for 30 seconds before it is turned on. 7) MTV1 will delay for 120 seconds before it is turned off.

1) 2) 3) 4) 5) 6) 7) 8)

ii. HEAT MODE---WITH ELECTRICAL HEATER AS BOOSTER MTV2 and AUX2 are always off. If Tr Ts, heat operation is terminated, MTV1 and AUX1 are turned off. Indoor fan repeatedly runs at low fan speed for 30 seconds and stops for 3 minutes. If Ti1