11-160.5

December, 2007

Cabinet Unit Heaters Steam / Hot Water

Model C

Model CW

model identification

Table of Contents I.

Page

Model Identification................................................................................................................................................. 3

Il. Design Benefits A. Features and Benefits...................................................................................................................................... 4 B. Factory Mounted Options................................................................................................................................. 5 C. Field Installed Accessories.............................................................................................................................. 6 IIl. Performance Data A. Hot Water Sample Sizing Calculations............................................................................................................ 7 B. Hot Water Correction Factors....................................................................................................................... 8-9 C. Hot Water Performance Data (Single Row Coil)............................................................................................ 10 D. Hot Water Performance Data (Two Row Coil)................................................................................................ 11 E. Steam Sample Sizing Calculations................................................................................................................ 12 F. Steam Correction Factors.............................................................................................................................. 13 G. Steam Performance Data.............................................................................................................................. 14 H. Mounting Height Correction Factors.............................................................................................................. 15 III. Model Dimensional / Motor Data A. Model C - Floor Mounted Units...................................................................................................................... 16 B. Model CW - Wall Mounted Units.................................................................................................................... 17 C. Duct Collar Dimensional Data........................................................................................................................ 18 IV.

Specifications A. Unit Data Specifications................................................................................................................................. 19 B. Unit Mechanical Specifications...................................................................................................................... 19

®

C

US

As Modine Manufacturing Company has a continuous product improvement program, it reserves the right to change design and specifications without notice. 

11-160.5

model identification

Figure 3.1 Model C - Exposed Floor Mounted Unit

Figure 3.2 Model CW - Exposed Wall or Ceiling Mounted Unit

Figure 3.3 Model CW - Recessed (full or partial) Wall or Ceiling Mounted Unit Shown with optional Perma-Lap® Frame

Figure 3.4 – Standard Air Flow Options Floor Mounted

Floor Mounted

Model C Arrangement 06

Model C Arrangement 08 with Fresh Air Option (Refer to Option Descriptions)

Model C Model C Arrangement 08 Arrangement 06 with Fresh Air Option (Refer to Option Descriptions)

Wall Mounted

Model CW Arrangement 00

Figure 3.5 – Inverted Air Flow Options

Model CW Arrangement 06

Model CW Arrangement 07

Model CW Arrangement 96

Model CW Arrangement 98

Wall Mounted

Model CW Arrangement 08

Model CW Arrangement 90

Model CW Arrangement 97

Model CW Arrangement 96

Model CW Arrangement 98

Ceiling Mounted

Model CW Arrangement 50

Model CW Arrangement 56

Model CW Arrangement 57

Model CW Arrangement 58

Recessed Floor➂ Recessed Floor➂

Model CW Arrangement 08

Recessed Wall➂

Recessed Ceiling➂

Model CW Arrangement 08

Model CW Arrangement 58

Unit Size 2 through 14

Model CW Arrangement 98

 Perma-Lap® frame available for recessed units.

Figure 3.6 - Model Nomenclature Model Type C = Floor Unit CW = Exposed, Recessed or Ceiling Unit

Model CW Arrangement 98

Recessed Wall➂

CW 04 0 6

Airflow Direction 0 = Bottom in, Top Out 6 = Front In, Top Out 7 = Bottom In, Front Out 8 = Front In, Front Out

11-160.5

Arrangement 0 = Wall or Floor 5 = Ceiling 9 = Inverted



fEATURES AND BENEFITS

➀

➇

➂ ➁

➃

➃

➈

➄ ➉

➅ ➆

Product Features and Benefits Feature

Benefits

1. One-Piece Cabinet Top and Sides

1. Cabinet top and sides are formed from a single sheet of 18 gauge steel reducing the number of parting lines common to multi-piece construction. Fronts are 16 gauge. All louvers are stamped as standard.

2. Wrap-Around Partitions and Back Sheet

2. Inner partition panels and back sheet are die-formed from a single sheet of 18 gauge steel. This assures precision fit and alignment of all internal components and maximum cabinet rigidity.

3 All-Welded Construction

3. Cabinet unit heaters utilize five to eight structural components in the basic cabinet. The components are fixture-aligned and welded.

4. Cabinet End Pockets

4. The two cabinet end pockets provide ample space for convenient installation of piping and electrical wiring. Easy access reduces costs and installation time.

5. Cabinet Finish

5. After assembly and welding operations are completed, the entire cabinet unit is treated for prevention of rust and corrosion. Entire cabinet is finished with a tan color, durable polyester powder-coat paint.

6. Quick-Change Permanent Filters

6. Filters are removable without tools. After opening the unit’s front panel, the filter easily slides out. Cleanable filters are provided as standard.

7. Insulation

7. Sound dampening insulation on all front panels.

8. Coils – Steam/Hot Water

8. All coils used in cabinet heaters use copper tube, aluminum fin construction with NPT connections; 3/4” for sizes 2 thru 6, and 1” for sizes 8 thru 14. Tubes are mechanically expanded into integral fin collars. Return bends and joints are silver alloy brazed and the coil is pressure-tested to 200 psi pressure. Field reversible coils allow piping to be made for left or right side connection, with left hand piping as factory standard.

9. Power Assembly

9. Blower platform, blower, and blower motor on all sizes are removable as a single unit. A direct drive, multi-speed, shaded pole motor with built in thermal overload protection powers the forward curved aluminum blower wheels. Right hand electrical as factory standard.

10. Speed Control

10. Solid state infinite speed control with off position.

11. Access Doors (not shown)

11. Tilt type access doors standard on model C units.



11-160.5

Factory Mounted options Table 5.1 Unit Equipment Options Option No. 101 110 140 141 142 147 150 112 114 115 116 117 122 124 125 134 135 136 137 118 138 123 120 129

Description Piping Options 2-Row High Capacity Coil, for use with water only. See page 11 for performance data. Right Hand Piping, Left Hand Electrical. Electrical Options Permanent Split Capacitor (PSC) Motor. Rated 115V/60Hz/1ph. Offers reduced electrical consumption over standard shadedpole motor. See page 19 for motor performance data. High Static Motor. Rated 115V/60Hz/1ph. Used to overcome up to 0.4”W.C. external static pressure. Plug-In Motor. Allows removal of motor(s) or fan board without unwiring unit. Disconnect Switch. On-Off DPST toggle switch to disconnect electric power (hot and neutral lines) to unit. Located in electrical end compartment. See Figure 6.3. Unit Mounted Return Air Thermostat. Temperature sensing bulb is located in return air stream. Temperature set point range 55° to 90°F, rated 115V. Not for use with inverted air flow arrangements. Normally used with a control valve (see Accessories). See Figure 6.3. Access Door Options Access Doors for Model CW. Two doors per unit. Front Panel Tamper Proof Fasteners. Includes tool for fasteners. Key Locks on Access Doors. Two locks per unit. Model CW requires Option 112. Especially valuable for units located in public place; these key locks make unit controls tamper-proof. Key Locks on Front Panel. Two per unit, one for each door. Especially valuable for units located in public place; these key locks make unit controls tamper-proof. Air Inlet Options Aluminum Bar Grille at Air Inlet. Bar grille replaces louvers. 12 gauge extruded aluminum. Model CW – 100% Air Inlet Duct Collar. Collar width is 1” for securing ductwork and is located at the bottom inlet, except on Arrangement 9 (inverted) where it is located at the top inlet. Model C – 25% Outside Air Inlet Duct Collar, Collar width is 1” for securing ductwork and is located at the rear inlet. Model C – 100% Outside Air Inlet Duct Collar, Collar width is 1” for securing ductwork and is located at the rear inlet. Model C – 25% Manual Outside Air Inlet Damper. A rear inlet, single damper to permit 0% to 25% of unit CFM as outside air. Operated by a manual knob located in end compartment. Model C – 100% Manual Outside Air Inlet Damper. A rear inlet, single damper to permit 0% to 100% of unit CFM as outside air. Operated by a manual knob located in end compartment. Model C – 100% Outside/Inside Air Motorized Damper. Allows outside or inside air using 115V electric stall motor and outside/inside changeover switch. Model C – 25% Outside Air/100% Inside Air Motorized Damper. Allows 25% outside air or 100% inside air using 115V electric stall motor and outside/inside changeover switch. Air Outlet Options Aluminum Bar Grille at Air Outlet. Bar grille replaces louvers. 12 gauge extruded aluminum. Two Way Adjustable Louvers. Allows lateral air deflection. Adjustable louvers and the aluminum bar grille option cannot be ordered together. 100% Air Outlet Duct Collar, 1” high mounted to unit air outlet. Top outlet on model CW, bottom outlet on inverted model CW. Miscellaneous Options Decorator Color, optional paint color from color chart 75-403. Leveling Bolts, allows leveling of unit on uneven floors. (Model C only)

Figure 5.1 Option 114 - Tamper Proof Screws Option 115 - Key Lock

Figure 5.2 Option 138 - Two-Way Adjustable Louvers (shown with Option 118 Aluminum Bar Grille)

Figure 5.3 Option 129 - Leveling Bolts

11-160.5



field installed accessories

Motor Starter

Perma-Lap® Frames

Toggle switch starter with thermal overload and off position. . If overload trips, starter must be reset by turning switch to off, then back to on position.

The Perma-Lap frame is a field installed accessory that can be used to recess model CW cabinet unit heaters. Units can be fully or partially recessed. The unit is framed in the recess providing permanent contact with any wall or ceiling whether it is a smooth, rough or irregular surface. This permanent bond does not permit air leakage, which can cause wall streaking.

Two and Three Way Electric Valves Installs to unit supply piping in piping end compartment. Opens and closes in conjunction with starting and stopping of blower motor(s) on thermostat demand, 115 volt, brass body. Model sizes 2 thru 6 use 3/4" NPT, sizes 8 thru 14 use 1" NPT. Can be used with option 150, unit mounted return air thermostat or wall thermostat. Select wall thermostat from accessory list. System pressure not to exceed 15 psi. Three-way valve adds bypass of water or steam.

Modulating Non-electric Valve Installs to unit supply piping in piping end compartment. Modulates hot water or steam flow in response to return air temperature, integral set point adjustment with remote sensing bulb located in return air stream. Responds to small changes in temperature. Requires constant blower operation. Modulating control reduces energy consumption and eliminates overheating. Temperature control range 48°-83°F. Straight through style valve, brass body. Unit sizes 2 thru 6 use 3/4" NPT, sizes 8 thru 14 use 1" NPT. System pressure not to exceed 15 psi.

Figure 6.1 Perma-Lap® Frames

Figure 6.2 Two Way Electric Valve

The front panel of the unit is never in contact with the wall or ceiling, so servicing is never a problem. The Perma-Lap frame has a 3/8" projection and a 1-1/2" width.

Aquastat Delays blower motor(s) operation until coil is hot to prevent cold air delivery on start-up. Installs on return pipe in piping end compartment. Temperature set point range 100°-240°F, 10 amps @ 115 volts, 10°F differential, non-adjustable.

Figure 6.3 Unit Mounted Return Air Thermostat & Solid State Speed Control (factory installed)

Figure 6.4 Outside Air Wall Box

A

B

Model Size A





11-160.5

2-6 8-14

15 7/8" 23 5/8"

B 6" 6"

sample sizing calculations - hot water

General Selection Procedure

Example 1 - Standard Coil

Selection of a cabinet unit heater requires the following information: 1) room heat loss; 2) heat loss due to ventilation load if outside air is introduced; 3) entering water temperature; 4) entering air temperature; 5) water flow rate and/or final water temperature; 6) required air circulation. Final selection of a cabinet unit heater is based on the following factors:

• Coil selection • Unit size • Model type • Air flow arrangement • Options and accessories

‑Application‑Requirements: • Heating load, 27,000 Btu/hr • Entering air temperature, 60°F • Entering water temperature, 210°F • Water flow, 2 GPM

Solution:

Coil Selection Generally, unit size is determined by the coils capacity to offset the design heat loss. Capacities of the standard and high capacity coils overlap, thereby making it possible to select the most economical coil for application requirements. The descriptions which follow illustrate the differences between the coils.

From Table 8.1, page 8, the heating capacity conversion factor is 1.071. From formula 9.2, page 9: 27,000 Btu/hr Standard Btu/hr = = 25,200 Btu/hr 1.071 Table 10.1, page 10 shows selection of a unit size 4 with 25,800 Btu/hr is sufficient for application requirements. From formula 9.1, page 9: Actual Btu/hr = 25,800 Btu/hr x 1.071 = 27,600 Btu/hr

Standard Coil (one row) - This coil will meet the vast majority of heating-application requirements. Maximum operating pressure: 200 psig water at 240°F. This coil is suitable for steam or hot water.

From formula 9.4, page 9:

High-Capacity Coil (two row) - Designed for use where the design load exceeds the capacity of the standard coil for a given size. This can be especially valuable where installation space is limited, since it will usually permit a smaller unit size to meet design requirements. The high-capacity coil will provide increased capacity over the standard coil in the same unit. The extra capacity of this coil may also allow use of lower water temperatures than the standard coil. Maximum operating pressures: 200 psig water at 240°F. High capacity two row coil not suitable for steam applications.

Example 2 - Standard Coil

Unit Size

Solution:

Cabinet unit heaters should be selected to offset room heat loss. Normally selection is made on the basis of high fan speed. This insures use of the smallest, most economical unit. Selections made in this manner will normally satisfy room heating requirements at lower fan speeds, except during periods of extreme weather.

From Table 8.2, page 8, the conversion factor for 0.05" W.C., ESP, can be determined to be 0.90. From formula 9.2, page 9:

Hot Water Selection Hot water heating capacities for cabinet unit heaters are based on standard conditions of 200°F entering water temperature (EWT), 60°F entering air temperature (EAT), and a 20°F water temperature drop (WTD). Conversion factors for other than standard conditions are listed in Table 8.1 on page 8. See formulas, page 9. An alternate method of unit selection at non-standard conditions requires actual performance to be converted to equivalent standard performance at 200°F EWT and 60°F. The required unit size can easily be determined from standard heating capacity tables on pages 10 and 11. See formulas, page 9.

27,600 Btu/hr Final Air Temperature = + 60°F = 116°F 450 CFM x 1.085

‑Application‑Requirements: • Heating load, 23,000 Btu/hr • Entering air temperature, 60°F • Entering water temperature, 220°F • Water flow, 3 GPM maximum • External static pressure, .05" W.C

Btu/hr required =

23,000 Btu/hr 0.90

= 25,500 Btu/hr for .05" ESP.

From Table 8.1, page 8 the heating capacity conversion factor is 1.143. From formula 9.2, page 9: Standard Btu/hr =

25,500 Btu/hr 1.143

= 22,300 Btu/hr

Table 10.1, page 10 shows a selection of a unit size 3 unit with 22,800 Btu/hr is sufficient for application requirements. Actual capacity is 22,800 Btu/hr x 0.90 x 1.14 = 23,400 Btu/hr Use formula 9.3, page 9 to calculate water temperature drop. Use formula 9.4, page 9 to determine final air temperature. Find CFM at 0.05" ESP from Table 8.2 on page 8.

11-160.5



correction factors - hot water

Table 8.1 Heating Capacity Conversion Factors

To determine the heating capacity (Btu/hr.) of a cabinet unit heater at any entering water temperature and entering air temperature, multiply the capacity at 200°F EWT and 60°F EAT (data on page 10-11) by the factor from this table. Note: GPM must be identical to that at 200°F EWT and 60°F EAT. Entering Water Entering Air Temperatures (°F) Temp. (°F) 0 10 20 30 40 50 60 70

80

90

100



100

0.769

0.683

0.599

0.518

0.439

0.361

0.286

0.212

0.140

0.069

0



110 120 130 140 150 160 170 180 190 200 210 220 230 240

0.846 0.923 1.000 1.077 1.154 1.231 1.308 1.385 1.462 1.539 1.615 1.692 1.769 1.846

0.759 0.835 0.911 0.987 1.063 1.139 1.215 1.291 1.367 1.443 1.519 1.594 1.670 1.746

0.674 0.749 0.824 0.899 0.974 1.049 1.124 1.199 1.274 1.349 1.424 1.499 1.573 1.649

0.592 0.666 0.740 0.814 0.888 0.962 1.036 1.110 1.184 1.258 1.332 1.406 1.480 1.554

0.512 0.585 0.658 0.731 0.805 0.878 0.950 1.024 1.097 1.170 1.243 1.312 1.390 1.463

0.434 0.506 0.578 0.651 0.723 0.795 0.867 0.940 1.012 1.084 1.157 1.229 1.301 1.373

0.357 0.429 0.500 0.571 0.643 0.714 0.786 0.857 0.929 1.000 1.071 1.143 1.214 1.286

0.283 0.353 0.424 0.494 0.565 0.636 0.706 0.777 0.848 0.918 0.989 1.060 1.130 1.201

0.210 0.279 0.349 0.419 0.489 0.559 0.629 0.699 0.768 0.838 0.908 0.978 1.048 1.118

0.138 0.207 0.276 0.345 0.414 0.483 0.552 0.621 0.690 0.759 0.828 0.897 0.966 1.035

0.068 0.137 0.205 0.273 0.342 0.410 0.478 0.547 0.615 0.684 0.752 0.820 0.889 0.957

Table 8.2 External Static Pressure Conversion Factors (standard coil) To determine the heating capacity (Btu/hr.) for applications with external static pressure, multiply the capacity at 200°F EWT and 60°F EAT (data on page 10-11) by the factor from this table. Unit 0.0" ESP 0.05" ESP 0.1" ESP 0.125" ESP Size BTU BTU BTU BTU CFM CFM CFM CFM Factor Factor Factor Factor 2 250 1.00 210 .90 170 .80 150 .77 3 330 1.00 280 .90 230 .80 200 .77 4 450 1.00 400 .90 325 .80 285 .77 6 620 1.00 540 .90 430 .80 380 .77 8 840 1.00 720 .90 590 .80 510 .77 10 1050 1.00 905 .90 735 .80 640 .77 12 1240 1.00 1065 .90 870 .80 755 .77 14 1430 1.00 1230 .90 1000 .80 870 .77

Table 8.3 CFM vs. Entering Air Temperature Conversion Factors To determine CFM at various entering air temperatures, multiply CFM from hot water performance tables by factor from this table. Entering Air Temperature (°F) 30°

40°

50°

60° 70°

Conversion Factor

1.04

1.02

1.00



1.06

11-160.5

0.982

80°

90°

0.964

0.945

correction factors - hot water

Table 9.1 Ethylene Glycol Correction Factors The following correction factors are for various percentages of ethylene glycol in water. Use the factors to correct the heating capacity of cabinet unit heaters when using an ethylene glycol solution. Follow the normal procedures in determining the heating capacity of a cabinet unit heater at any water temperature and entering air temperature, then apply the correction factor from the following table to determine the corrected heating capacity based on an ethylene glycol solution. Ethylene Glycol Solution % Solution Temperature (°F) 20% 30% 40% 50% 60% 70% 100 0.99 0.96 0.93 0.89 0.85 0.81 150 0.99 0.96 0.94 0.90 0.87 0.83 200 0.99 0.96 0.94 0.92 0.88 0.85 240 0.98 0.96 0.94 0.92 0.89 0.86

80% 0.76 0.78 0.81 0.82

Formulas: Hot Water 9.1) BTUA = BTUS x Factor (Table 8.1 or 8.2, page 8) 9.2) BTUS = 9.3) DA = 9.4) FA =

BTUA Factor

(Table 8.1 or 8.2, page 8)

BTUA 500 x GA BTUA + EA CFMA x 1.085

Identification of Symbols BTU = Btu/hr performance D

= Water temperature drop (°F)

E

= Entering air temperature (°F)

F

= Final air temperature (°F)

G

= Gallons per minute (GPM)

Subscripts S

= Standard operating condition (200°F EWT, 60°F EAT)

A

= Actual operating conditions

11-160.5



performance data - hot water 200°F Entering Water/60°F Entering Air

Table 10.1 Standard One Row Coil at Standard Conditions

High Fan Speed Low Fan Speed



Water Final Air Water Final Air Pressure Unit Temp. Temp. Temp. Temp. Drop Size Btu/hr. CFM Drop °F °F Btu/hr. CFM Drop °F °F GPM (Ft. of Water)

10,700

44.0

99

7,800



12,000

24.7

104

9,100

18.6

119

1.00

.1

2

12,400 250 20.0

105

9,500

15.3

122

1.28

.1

150

31.9

111

.50

.1



12,600

17.3

106

9,700

13.3

123

1.50

.2



12,900

13.3

107

10,200

10.5

127

2.00

.2



18,000

36.8

110

12,200

25.1

117

1.00

.1



20,100

27.6

116

13,600

18.7

124

1.50

.2

3 22,100 330 20.0

121

14,900

13.8

130 2.23

.3



123

15,200

12.5

131

.4

22,800

18.8

195

2.50



23,000

15.7

124

15,600

10.7

133

3.00

.5



20,100

41.3

101

16,100

33.1

115

1.00

.1



25,800

26.6

113

19,200



4 28,100

450 20.0

19.7

125

2.00

.3

117 20,500 270

14.7

130 2.87

.5



29,900

15.4

121

21,500

11.1

133

4.00

.7



31,000

12.8

123

22,100

9.1

135

5.00

.9



36,900

36.9

115

28,200

28.2

130

2.00

.3



41,000

27.3

121

30,400

20.3

136

3.00

.6



6



44,300

620 20.0

45,100

18.0

126 31,800 370

15.9

139

4.43

.9

127

13.0

141

5.00

1.1

32,600



46,300

15.4

129

33,200

11.0

143

6.00

1.4



41,700

42.6

105

32,500

33.2

115

2.00

.1



47,500

24.2

112

35,500



48,800

8

840 20.0

113 36,200

545

18.1

120

4.00

.2

14.8

121

5.00

.4



49,700

16.9

114

36,700

12.5

122

6.00

.5



51,300

13.1

116

37,200

9.5

122

8.00

.9



50,800

34.6

104

39,800

2.71

113

3.00

.1



54,900

22.5

108

42,700

17.5

117

5.00

.4



10



55,700

1050 20.0

57,100

16.7

108

43,300

110

44,500

685

15.5

118

5.70

.5

13.0

119

7.00

.7



58,200

13.2

111

45,300

10.3

121

9.00

1.1



68,100

34.8

110

51,400

26.3

118

4.00

.2



71,000

24.2

112

53,700

18.3

121

6.00

.6

1240 20.0

113

54,700

15.1

122 7.40

.8



12 72,300

805



74,000

15.1

115

55,400

11.3

123

10.00

1.4



74,900

12.8

115

55,900

9.5

124

12.00

1.8



73,700

37.7

107

57,000

29.1

116

4.00

.2



77,200

26.3

109

59,400

20.2

118

6.00

.6

111

61,200

15.5

120

8.10

1.0





80,500

16.5

111

62,000

12.7

121

10.00

1.4



81,300

13.9

112

62,400

10.6

121

12.00

1.8

10

14 79,200

1430 20.0

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930

performance data - hot water

Table 11.1 Optional High Capacity Two Row Coil at Standard Conditions

200°F Entering Water/60°F Entering Air

High Fan Speed Low Fan Speed



Water Final Air Water Final Air Pressure Unit Temp. Temp. Temp. Temp. Drop Size Btu/hr. CFM Drop °F °F Btu/hr. CFM Drop °F °F GPM (Ft. of Water)

20,100

41.3

134

13,500

27.8

148

1.00

.7



21,800

29.9

140

14,200

19.5

153

1.50

1.1

22,700

23.4

144

14,500

15.0

155

2.00

1.7

23,200 20.0

146

14,700

12.7

156 2.40 2.8



2

250

140



23,800

16.4

148

14,900

10.3

158

3.00

4.3



31,400

32.1

149

21,200

21.7

160

2.00

1.4



32,400

26.5

151

21,900

17.9

163

2.50

2.1

33,000

22.5

154

22,300

15.2

165

3.00

2.8



3

325

195

33,400 20.0

155 22,600

13.4

167 3.60 3.7



156

11.7

168

33,800

17.3

22,900

4.00

4.6



41,900

42.9

148

28,700

29.4

158

2.00

1.5



43,200

35.4

151

29,600

24.3

161

2.50

2.3



4



44,100

440

45,200

30.1

152

30,200

23.1

155

31,000

270

20.6

163

3.00

3.0

15.9

166

4.00

5.0



45,800 20.0

156 31,400

12.7

168

4.70

8.8



49,800

49.8

135

35,900

35.9

149

2.00

1.4



54,300

36.2

141

38,100

25.4

155

3.00

2.8

56,800

28.4

145

39,300

19.6

158

4.00

4.8



6

615

370



58,500

23.4

148

40,100

16.0

160

5.00

7.2



59,700 20.0

150

40,600

13.5

161

6.00

10.1



67,000

27.4

134

50,900

20.8

147

5.00

1.0



71,400

20.9

138

53,900

15.7

152

7.00

1.7

835 20.0

139

54,400

15.0

153 7.40

1.9

143

56,500

11.6

157

10.00

3.2



8 71,900



74,900

15.3

540



76,500

13.0

144

57,600

9.8

158

12.00

4.3



79,800

27.2

131

62,200

21.2

144

6.00

1.4



83,600

21.4

134

65,000

16.6

148

8.00

2.2



84,600

1040 20.0

135

65,800

15.5

149

8.70 2.5

10

680



88,000

15.0

138

68,100

11.6

152

12.00

4.3



89,100

13.0

139

68,900

10.1

153

14.00

5.8



99,800

29.2

135

77,200

22.6

150

7.00

1.7



103,500

23.5

138

79,900

18.2

153

9.00

2.6



12



105,600

1220 20.0

107,600

16.9

140

81,500 790

15.4

155

10.80 3.6

141

82,900

13.0

157

13.00

5.0



109,100

14.9

142

83,900

11.4

158

15.00

6.5



114,200

25.9

135

87,800

20.0

148

9.00

2.6



117,100

21.8

137

89,900

16.7

151

11.00

3.7



118,300

1410 20.0

137

91,100

15.4

152

12.10

4.4

14

915



120,200

16.4

139

92,400

12.6

153

15.00

6.5



121,800

14.7

140

93,300

11.2

154

17.00

8.2

11-160.5

11

sample sizing calculations - steam

General Selection Procedure

Example 1 - Standard Coil

Selection of a cabinet unit heater requires the following information: 1) room heat loss; 2) heat loss due to ventilation load if outside air is introduced; 3) steam pressure available; 4) entering air temperature; 5) required air circulation. Final selection of a cabinet unit heater is based on the following factors: • Coil selection - One Row Coil only • Unit size • Model type • Air flow arrangement • Options and accessories

Coil Selection Generally, unit size is determined by the coils capacity to offset the design heat loss. Capacities of the standard coils overlap, thereby making it possible to select the most economical coil for application requirements. Standard Coil (one row) - This coil will meet the vast majority of heating-application requirements. Maximum operating pressure: 10 psig steam. This coil is suitable for steam or hot water.

Steam Selection Steam capacities for cabinet unit heaters are based on standard conditions of 2 psig steam and a 60°F entering air temperature (EAT). Conversion factors for other than standard conditions are listed in Table 13.1, page 13.

‑Application‑Requirements: • Heating load, 29,000 Btu/hr • Entering air temperature, 60°F • Entering steam pressure, 5 psig

Solution: From Table 13.1 on page 13, conversion factor is 1.05. From formula 13.2, page 13: 29,000 Btu/hr Standard Btu/hr = = 27,600 Btu/hr 1.05 Table 14.1, page 14 shows selection of a unit size 3 with 28,300 Btu/hr is sufficient for application requirements. From formula 13.1, page 13: Actual Btu/hr = 28,300 Btu/hr x 1.05 = 29,400 Btu/hr From formula 13.3, page 13: Actual Btu/hr Actual Condensate rate = Latent Heat or Steam =

29,400 Btu/hr 961

= 31 lbs/hr

From formula 13.4, page 13: 29,400 Btu/hr Final Air Temperature = + 60°F = 143°F 330 x 1.085

12

11-160.5

Header correction factors - steam

Table 13.1 Heating Capacity Conversion Factors To determine the heating capacity (Btu/hr.) of a cabinet unit heater at any steam pressure and entering air temperature, multiply the capacity (2 lbs. steam, 60°F EAT) on page 14 by the factor from this table. Latent Steam Steam Heat Temperature of Entering Air (°F) Press. Temp. of (psig) (°F) Steam -10° 0° 10° 20° 30° 40° 50°

60° 70°

80°

90°

100°



0

212

970

1.54

1.45

1.37

1.27

1.19

1.11

1.03

0.96

0.88

0.81

0.74

0.67



2

219

966

1.59

1.50

1.41

1.32

1.24

1.16

1.08

1.00

0.93

0.85

0.78

0.71



5

227

961

1.64

1.55

1.46

1.37

1.29

1.21

1.13

1.05

0.97

0.90

0.83

0.76



10

239

953

1.73

1.64

1.55

1.46

1.38

1.29

1.21

1.13

1.06

0.98

0.91

0.84

Table 13.2 External Static Pressure Conversion Factors (standard coil) To determine the heating capacity (Btu/hr.) for applications with external static pressure, multiply the capacity (2 lbs. steam and 60°F EAT) on page 14 by the factor from this table. The following conversion factors may be used with standard steam data Table 14.1, page 14. 0.0" ESP 0.05" ESP 0.1" ESP 0.125" ESP Unit BTU BTU BTU BTU Size CFM Factor CFM Factor CFM Factor CFM Factor 2

250

1.00

210

.90

170

.80

150

.77



3

330

1.00

280

.90

230

.80

200

.77



4

450

1.00

400

.90

325

.80

285

.77



6

620

1.00

540

.90

430

.80

380

.77



8

840

1.00

720

.90

590

.80

510

.77



10

1050

1.00

905

.90

735

.80

640

.77



12

1240

1.00

1065

.90

870

.80

755

.77



14

1430

1.00

1230

.90

1000

.80

870

.77

Table 13.3 CFM Versus Entering Air Temperature Conversion Factors To determine CFM at various entering air temperature multiply the CFM from steam performance tables by factor from this table. Entering Air Temperature (°F) 30°

40°

50°

60° 70°

Conversion Factor

1.04

1.02

1.00

1.06

0.982

80°

90°

0.964

0.945

Formulas: Steam 13.1) BTUA = BTUS x Factor 13.2) BTUS =

(Table 13.1 or 13.2)

BTU

= Btu/hr performance

BTUA

C

= Condensate (LBS/hr.)

Factor

E

= Entering air temperature (°F)

F

= Final air temperature (°F)

(Table 13.1 or 13.2)

13.3) CA = BTUA Latent Heat of Steam 13.4) FA =

Identification of Symbols

BTUA + EA CFMA x 1.085

Subscripts S

= Standard operating condition (2 lbs. steam, 60°F EAT)

A

= Actual operating conditions

11-160.5

13

Header performance data - steam 2 lbs. Steam/60°F Entering Air

Table 14.1 Standard One Row Coil at Standard Conditions Fan Unit Speed Final Air Condensate Size Btu/hr. CFM (RPM) EDR Temp. °F Lbs./Hr.



















52,900





76,000 60,600

685

625

253

141

63





95,400

1240

1050

398

130

99

75,100

805

625

313

146

78





102,600

1430

1050

428

126

106

81,700

930

625

340

141

85

2 3 4 6 8

10

12 14

14

19,800

250

1050

82

133

14,600

150

625

61

156

15

28,300

330

1050

118

139

29

18,000

195

625

75

145

19

42,500

450

1050

177

147

44

29,300

270

625

122

160

30

52,100

620

1050

217

137

54

42,700

370

625

178

166

44

67,700

840

1050

282

134

70

545

625

220

149

55

1050

1050

317

126

79

11-160.5

21

Header correction factors Mounting Height Height at which cabinet unit heaters are installed is critical. Maximum mounting heights for all units are listed in the tables below. The data in tables are based on operating conditions of 2 lbs. steam or 220°F entering water with 60°F entering air. When operating conditions are other than those above, refer to chart for mounting height correction factor. To obtain the maximum mounting height at actual operating conditions, multiply the appropriate factor from chart by the mounting height in Tables. The mounting heights must be followed closely to assure maximum comfort.

Strong opposing drafts, large obstructions in the air stream of the unit, and higher than normal discharge air temperatures (resulting from high steam pressures) can prevent the heated air discharged by the cabinet unit from reaching the floor. Under unfavorable conditions such as these, allowances must be made to assure maintenance of desired comfort.

Table / Figure 15.1 Maximum Mounting Height 

Table / Figure 15.2 Maximum Mounting Height 

Size H T (Ft.) (Ft.)

Size H T (Ft.) (Ft.)



2

8

15



3

8

18



4

9

22



6

9

23



8

10

26



10

10

27



12

11

26



14

11

27

Standard Air Flow Ceiling-Mounted

H T Inverted Air Flow Wall-Mounted

2

7

8



3

8

10



4

8

11



6

8

12



8

10

16



10

10

18



12

11

20



14

11

21

H T Inverted Air Flow Wall-Mounted T



Maximum mounting height and corresponding heat throw of heaters operating at standard conditions (2 lbs. steam or 220°F entering water, 60° entering air).



Maximum mounting height and corresponding heat throw of heaters operating at standard conditions (2 lbs. steam or 220°F entering water, 60° entering air).



Standard Air Flow Ceiling-Mounted

H T

H

Table 15.3 Maximum Mounting Heights Correction Factors

correction factor “R”

These correction factors are to be used as multipliers to correct the maximum recommended mounting heights “H” or heat throw “T” of cabinet unit heaters when operated with steam pressures other than 2 pounds or with water at other than entering temperature of 220°F. 1.3

Steam Pressure

1.2

2

5

10

1.1 1.0 .9 .8 .7 .6 .5 150° 160° 170°

180° 190°

200° 210°

220°

230° 240°

average water temp. (°F)

11-160.5

15

HeaderC dimensional / motor data model Floor Mounted Figure 16.1 Floor Model C, Sizes 2-14 Steam/Hot Water Cabinet Unit Heaters

access door

access door

43/4"

C

F

coil connections 3 sizes 2-6: /4" Npt for standard coil 5 /8" i.d. sweat for two row coil sizes 8-14: 1" Npt, one or two row coil

51/2" G

speed control and j-box

L N

/16" mounting holes sizes 8-14 only

7

J

/2"

1

(size 8-14 only)

3"

Optional Outlet 11"

41/2" speed control and j-box 23/4" K

B sizes 2-6 45/8" x 3/8" slotted mounting holes in rear flange

41/2"

M

E Air Inlet

filter

H

D A

note: Left hand piping is standard, right hand piping available when specified. Bottoms of end compartments are open for piping and electrical access.

Table 16.1 Cabinet Dimensions (inches) a b c

Unit

Size

2 3 4 6 8 10 12 14

38-3/4 43-3/4 48-3/4 61-3/4 71-3/4 71-3/4 83-3/4 83-3/4

25 25 25 25 28 28 28 28

9-3/4 9-3/4 9-3/4 9-3/4 12 12 12 12

Table 16.2 Filter Dimensions (inches) ➀

d

e

8 8 8 8 10 10 10 10

5 5 5 5 7 7 7 7

f g

5-1/8 5-1/8 5-1/8 5-1/8 5-1/8 5-7/8 5-1/8 5-7/8

15-5/8 19-5/8 27-5/8 39-5/8 47-5/8 47-5/8 59-5/8 59-5/8

h

j

19-5/8 23-5/8 27-5/8 39-5/8 30-5/8 39-5/8 51-5/8 51-5/8

– – – – 9-3/4 9-3/4 9-3/4 9-3/4

Approx. Shipping Weight lbs.

80 90 110 120 160 165 185 190

Unit Size 2................. 8-1/2 3................. 8-1/2 4................. 8-1/2 6................. 8-1/2 8 & 10............. 10-3/4 12 & 14............ 10-3/4

➀

x x x x x x

20-3/4 25-3/4 30-3/4 43-3/4 49-3/4 61-3/4

x x x x x x

1/2 1/2 1/2 1/2 1/2 1/2

Filters are permanent/cleanable.

Table 16.3 Coil Connection Dimensions (inches)

Table 16.4 Motor Ratings (115 volts/60hz/1Ø)

Unit Size 2 thru 6

22-1/2

7-3/8

15-1/4

2-3/8

8 thru 14

25-5/8

9-1/4

18

1-5/8

Standard psc Motor High Static Unit Motor Motor Option 140 Motor option 141 size qty. HP Total Amps HP Total Amps HP Total Amps 2 + 3 1 1/30 1.7 1/30 0.70 0.4 4.60 4 + 6 1 1/20 2.37 1/20 1.05 0.4 4.60 8 + 10 1 1/30 1/30 0.8 9.20 1.75 4.07 1 1/20 1/20 0.8 12 + 14 2 1/20 4.74 1/20 2.10 0.8 9.20

16

k

l m

n

11-160.5

model CW dimensional / motor data Exposed or Recessed Wall / Ceiling Mounted Figure 17.1 Wall or Ceiling Model CW, Sizes 2-14 Steam/Hot Water Cabinet Unit Heaters

L

C

F

coil connections 3 sizes 2-6: /4" Npt for standard coil 5 /8" i.d. sweat for two row coil sizes 8-14: 1" Npt, one or two row coil

G

Standard Outlet

N

J

(size 8-14 only)

7 /16" mounting holes Model Sizes 8-14 only

/2"

1

3"

Optional Outlet

41/4"

speed control and j-box

K

11"

B 93/4" M Optional Inlet

sizes 2-6 45/8" x 3/8" slotted mounting holes in rear flange

41/4" 23/4" Standard Inlet

A note: Left hand piping is standard, right hand piping available when specified. Bottoms of end compartments are open for piping and electrical access.

Table 17.1 Cabinet Dimensions (inches)

Table 17.2 Filter Dimensions (inches) ➀

Approx. a b c f g j Shipping Unit Weight Size lbs. 2 38-3/4 25 9-3/4 5-1/8 15-5/8 – 90 3 43-3/4 25 9-3/4 5-1/8 19-5/8 – 100 4 48-3/4 25 9-3/4 5-1/8 27-5/8 – 120 6 61-3/4 25 9-3/4 5-1/8 39-5/8 – 130 8 71-3/4 28 12 5-1/8 47-5/8 9-3/4 170 10 71-3/4 28 12 5-7/8 47-5/8 9-3/4 175 12 83-3/4 28 12 5-1/8 59-5/8 9-3/4 195 14 83-3/4 28 12 5-7/8 59-5/8 9-3/4 200

Unit Size 2..................... 8-1/2 3..................... 8-1/2 4..................... 8-1/2 6..................... 8-1/2 8 & 10................. 10-3/4 12 & 14................ 10-3/4

➀

x x x x x x

20-3/4 25-3/4 30-3/4 43-3/4 49-3/4 61-3/4

x x x x x x

1/2 1/2 1/2 1/2 1/2 1/2

Filters are permanent/cleanable.

Table 17.3 Coil Connection Dimensions (inches)

Table 17.4 Motor Ratings (115 volts/60hz/1Ø)

Unit Size 2 thru 6

22-1/2

7-3/8

15-1/4

2-3/8

8 thru 14

25-5/8

9-1/4

18

1-5/8

Standard psc Motor High Static Unit Motor Motor Option 140 Motor option 141 size qty. HP Total Amps HP Total Amps HP Total Amps 2 + 3 1 1/30 1.7 1/30 0.70 0.4 4.60 4 + 6 1 1/20 2.37 1/20 1.05 0.4 4.60 8 + 10 1 1/30 1/30 0.8 9.20 1.75 4.07 1 1/20 1/20 0.8 12 + 14 2 1/20 4.74 1/20 2.10 0.8 9.20

k

l m

n

11-160.5

17

duct collar dimensional data

Figure 18.1 Model CW - Duct Collars C

A

C

D

B

E

3/4"

3/4"

A

C

B

C

3/4"

18

a b c 18-1/4 4-1/4 10-3/8 23-1/4 4-1/4 10-3/8 28-1/4 4-1/4 10-3/8 41-1/4 4-1/4 10-3/8 44-1/4 4-1/4 10-7/8 44-1/4 5-1/4 10-7/8 58-1/4 4-1/4 12-7/8 58-1/4 5-1/4 12-7/8

d 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2

e 3 3 3 3 5-1/4 4-1/4 5-1/4 4-1/4

E

Outside Air Percentage 25% 100% Options 124, 134 and 137 Options 125 and 135 Unit Size A B C A B C 2 12 1/4 3 1/2 13 1/4 18 1/2 4 1/4 10 1/8 3 12 1/4 3 1/2 15 3/4 23 1/2 4 1/4 10 1/8 4 12 1/4 3 1/2 18 1/4 28 1/2 4 1/4 10 1/8 6 12 1/4 3 1/2 24 3/4 41 1/2 4 1/4 10 1/8 8 24 1/4 3 1/2 23 3/4 44 1/2 4 1/4 13 5/8 10 24 1/4 3 1/2 23 3/4 44 1/2 5 1/4 13 5/8 12 24 1/4 3 1/2 29 3/4 58 1/2 4 1/4 12 5/8 14 24 1/4 3 1/2 29 3/4 58 1/2 5 1/4 12 5/8

B A

Unit Size 2 3 4 6 8 10 12 14

Table 18.2 ➀ ➁ Options 124, 125, 134, 135 and 137 - Model C 25% and 100% Fresh Air Duct Collar

Figure 18.2 Model C - Outside Air Duct Collar

C

Table 18.1 ➀ ➁ Options 122 and 123 - Model CW 100% Air Inlet or Outlet Duct Collars

C

➀ All dimensions are in inches. ➁ Includes 3/4" top and bottom duct flanges for duct connection.

11-160.5

unit / mechanical specifications Table 19.1 Unit Data Specifications Unit Size 2 3 ▲



4

6

8

10

12

14

Coil Standard – 1 Row Face Area, Ft.2 High Capacity – 2 Row Face Area, Ft.2

1.0 1.1

1.3 1.5

1.6 1.8

2.3 2.7

3.4 3.6

3.4 3.6

4.6 4.8

4.6 4.8

Standard Coil Connections . . . . . . . . . . . High Capacity Coil Connections . . . . . . .

3/4" NPT 5/8" ID Sweat

3/4" NPT 5/8" ID Sweat

3/4" NPT 5/8" ID Sweat

3/4" NPT 5/8" ID Sweat

1" NPT 1" NPT

1" NPT 1" NPT

1" NPT 1" NPT

1" NPT 1" NPT

Blowers (Direct Drive) No./Dia. x Width (Inches) . . . . . . . . . . . .

1 / 5-1/4 x 7 1 / 5-3/4 x 7 2 / 5-1/4 x 7 2 / 5-3/4 x 7 3 / 5-3/4 x 7 3 / 5-3/4 x 7 4 / 5-3/4 x 7 4 / 5-3/4 x 7



High Speed (Rpm) . . . . . . . . . . . . . . . . . Low Speed (Rpm) ① . . . . . . . . . . . . . . . .

1050 625

1050 625

1050 625

1050 625

1050 625

1050 625

1050 625

1050 625



High CFM . . . . . . . . . . . . . . . . . . . . . . . . Low CFM ① . . . . . . . . . . . . . . . . . . . . . .

250 150

330 195

450 270

620 370

840 545

1050 685

1240 805

1430 930

1/30 115/1/60

1/30 115/1/60

1/20 115/1/60

1/20 115/1/60

1/30 1/20 115/1/60

1/30 1/20 115/1/60

1/20 115/1/60

1/20 115/1/60

Amps, Standard Shaded Pole Motors . . . Amps, Option #140 PSC Motor . . . . . . . Amps, Option #141 High Static Motor . .

1.7 .7 4.6

1.7 .7 4.6

2.37 1.05 4.6

2.37 1.05 4.6

4.07 1.75 9.2

4.07 1.75 9.2

4.74 2.10 9.2

4.74 2.10 9.2

Shipping Weight – Lbs. Model C . . . . . . . . . . . . . . . . . . . . . . . . . . Model CW . . . . . . . . . . . . . . . . . . . . . . . .

80 90

90 100

110 120

120 130

160 170

165 175

185 195

190 200

② Motor HP . . . . . . . . . . . . . . . . . . . . . . . . Volts/Phase/Hertz . . . . . . . . . . . . . . . . . .

① Standard solid state speed control offers infinite speed control between high and low speed/CFM. ② Sizes 2-6 have one motor. Sizes 8-14 have two motors.

Unit Mechanical Specifications Cabinet

Dampers (optional equipment)

Floor models shall be provided with stamped louvers and a one inch high dust barrier at the bottom. The cabinet shall be 18-gauge steel with 16 gauge front panels. All painted surfaces shall be treated for corrosion resistance prior to being finished with a tan, baked on polyester powder coat finish. All unpainted steel shall be galvanized. (When specified) color as selected by architect shall be provided in one of 8 optional colors as shown on manufacturer’s color chart 75-403.

When specified, the unit shall be equipped with a 25% galvanized steel fresh air blade damper. Model C, floor units only.

Wall or ceiling models shall have cabinets with stamped louvers. The entire bottom of the unit must be enclosed. Access to the speed control shall be through the easy access 16-gauge front panels.

2. The damper shall be controlled by an electric, spring-return type motor, which will be energized when the blower motor is turned on thus moving the damper to the 25% or 100% position. It will be de-energized and close the damper when the blower motor is off.

(Available, when specified, as optional equipment) an access door shall be provided for speed control access.

Coils The heating coils shall provide specified capacities and not exceed the pressure drop and GPM listed in this catalog. Coils shall be suitable for 200 PSI working pressure with 240°F water or 10psi steam.

The unit shall have a unit-mounted solid state motor speed control, with high through low speeds and off positions on all models.

1. These dampers shall be controlled from the end pocket with a manual control assembly that indicates the open and closed positions.

Motors, Blowers and Drives

All models shall have two 9" minimum wide piping end pockets. All wall and ceiling units shall have safety hinged access panels that can be easily removed during installation.

Motor Speed Control

When dampers are specified, indicate one of the following:

Blowers shall be of the centrifugal, forward curved type, to provide even air distribution and low sound level. All units shall have shaded pole (permanent split capacitor available when specified as optional equipment) direct-drive motors. The motor and blower assembly shall be capable of being easily removed from the unit. Motors are built for continuous duty to NEMA standards.

Grilles (optional equipment) When specified, aluminum linear bar inlet and/or outlet grilles shall be provided. When specified, outlet may have two-way deflection louvers.

Filters All air, both fresh and return, shall be filtered by a cleanable expanded aluminum filter.

11-160.5

19

The Modine brand has been the industry standard since Arthur B. Modine invented and patented the first lightweight, suspended hydronic unit heater in 1923. No other manufacturer can provide the combined application flexibility, technical expertise and fast delivery found at Modine.

Products from Modine are designed to provide indoor air-comfort solutions for commercial, institutional and industrial applications. Whatever your heating, ventilating and cooling requirements, Modine has the product to satisfy your needs, including: • Gas-fired unit heaters • Gas-fired duct furnaces • Gas-fired high-intensity infrared heaters • Gas-fired low-intensity infrared heaters • Steam/hot water unit heaters • Steam/hot water cabinet unit heaters

Consult your local Modine

• Steam/hot water commercial fin tube radiation

distributor for help in solving your

• Oil-fired unit heaters

indoor air problems.

• Electric unit heaters • Indoor gravity vented single and multiple duct furnace make-up air units • Indoor separated combustion single and multiple duct furnace make-up air units • Outdoor single and multiple duct furnace make-up air units • Direct-fired make-up air units With burner capacities up to 7,862,000 Btu/hr and air-handling capacities as high as 60,000 CFM, Modine products are compatible with every fuel type, including: • Natural or Propane Gas • Steam/Hot Water • Oil • Electric Specific catalogs and computer-generated heat-loss calculations are available for each product. Catalogs 75-136 and 75-137 provide details on all Modine HVAC equipment.

Distributed By: Commercial Products Group Modine Manufacturing Company 1500 DeKoven Avenue Racine, Wisconsin 53403-2552 Phone: 1.800.828.4328 (HEAT) Fax: 1.800.204.6011 www.modine.com © Modine Manufacturing Company 2007 12/07 - Litho in USA

11-160.5