High Efficiency
Horizontal and Vertical
Water-Source Comfort System
TM
Axiom
1/2 - 20Tons - 50 Hz - Vertical (Model GEV)
1/2 - 12-1/2Tons - 50 Hz - Horizontal (Model GEH)
WSHP-PRC003-EN
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Contents
Introduction
2
4
Model Number Descriptiom
General Data
5
Features and Benefits
Options
10
10
Controls
17
Application Considerations
Performance Data
Electrical Performance
Cool and Heat Performance - English
Correction Factors - English
Cool and Heat Performance - Metric
Correction Factors - Metric
Fan Performance - English/Metric
Sound Data
25
29
29
30
72
75
117
120
134
135
143
171
180
181
185
Control Wiring
Dimensional Data
Accessories
Thermostats and Zone Sensors
Options
Mechanical Specifications
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Model Number
Horizontal/Vertical Water-Source Confort System
G E H B 036 9 1 D 0 1 1 0 D L D 0 1 0 N 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0
15
20
30
25
10
5
DIGITS 1-3: UNIT CONFIGURATION
GEH = High Efficiency Horizontal
GEV = High Efficiency Vertical
C = Drive Package C (GEH/GEV)
D = Drive Package D (GEH/GEV)
E = Drive Package E (GEH/GEV)
F = Drive Package F (GEH/GEV)
G = Drive Package G (GEH/GEV)
H = Drive Package H (GEH/GEV)
J = Drive Package J (GEV)
H = Fan Status and Filter
MaintenanceTimer
J = Fan Status, Filter Maintenance
Timer and Condensate Overflow Sensor
DIGIT 4: DEVELOPMENT
SEQUENCE B
DIGITS 20:TEMPERATURE SENSOR
0 = No AdditionalTemperature
Sensor
DIGITS 5-7: NOMINAL CAPACITY
006 = 1/2Ton
009 = 3/4Ton
012 = 1Ton
015 = 1 1/4Ton
018 = 1 1/2Ton
024 = 2Ton
072 = 6Ton
DIGIT 13: CUSTOMER CHANNEL
1 = Boiler/Tower Design forTrane
Commercial Group
2 = Geothermal Design forTrane
Commercial Group
1 = Entering Water Sensor
090 = 7-1/2Ton
120 = 10Ton
150 = 12-1/2Ton
180 = 15Ton
240 = 20Ton
DIGITS 21: NIGHT SETBACK
CONTROL
0 = No Night Setback Relay
N = Night Setback Relay
5 =Trane International Group
030 = 2 1/2Ton
036 = 3Ton
042 = 3 1/2Ton
DIGIT 14: OPEN DIGIT
0 = Standard Design
DIGITS 22: ELECTRIC HEAT
0 = No Electric Heat
1 = Internal Boilerless Electric Heat
DIGIT 8: VOLTAGE (Volts/Hz/Phase)
6 = 220-240/50/1
9 = 380-415/50/3
DIGIT 15: SUPPLY-AIR
ARRANGEMENT
B = Back Supply-Air Arrangement
F = Front Supply-Air Arrangement
L = Left Supply-Air Arrangement
R = Right Supply-Air Arrangement
T =Top Supply-Air Arrangement
DIGITS 23: UNIT MOUNTED
DISCONNECT
0 = No Unit Mounted Disconnect
DIGITS 9: HEAT EXCHANGER
1 = Copper-Water Coil
2 = Cupro-Nickel Water Coil
DIGITS 24: FILTERTYPE
0 = 1" Filter; No Duct Flange
1 = 1"Throwaway Filter
2 = 2"Throwaway Filter
DIGIT 10: CURRENT DESIGN
SEQUENCE
DIGIT 16: RETURN-AIR
ARRANGEMENT
L = Left Return-Air Arrangement
R = Right Return-Air Arrangement
B = Back Return-Air Arrangement
F = Front Return-Air Arrangement
DIGITS 25: ACOUSTIC
ARRANGEMENT
0 = Enhanced Sound Attenuation
1 = Deluxe Sound Attenuation
DIGIT 11: REFRIGERATION
CIRCUIT
0 = Heating and Cooling Circuit
2 = Heating and Cooling Circuit
with Hot Gas Reheat
3 = Heating and Cooling Circuit
with Waterside Economizer
4 = Heating and Cooling Circuit
with HGR and WSE
DIGIT 17: CONTROLTYPES
0 = Basic 24 V Controls
D = Deluxe 24 V Controls
C =Tracer ZN510 Controls
B =Tracer ZN524 Controls
DIGITS 26: FACTORY
CONFIGURATION
0 = Standard Factory Configuration
DIGITS 27: PAINT COLOR
A = Cooling ONLY Circuit
C = Cooling ONLY Circuit
with Hot Gas Reheat
0 = No Paint Selection Available
DIGITS 18:TSTAT/SENSOR
LOCATION
DIGITS 28: OUTSIDE AIR
D = Cooling ONLY Circuit
with Waterside Economizer
E = Cooling ONLY Circuit
with HGR and WSE
0 = Wall Mounted Location
0 = No Outside Air Option Available
DIGITS 19: FAULT SENSORS
0 = No Fault Sensor
1 = Condensate Overflow Sensor
2 = Filter MaintenanceTimer
3 = Condensate Overflow and Filter
MaitenanceTimer
4 = Fan Status Sensor
6 = Condensate Overflow and Fan
Status
DIGITS 29: PIPING ARRANGEMENT
0 = Standard Piping Arrangement
1 = Standard Piping with Schrader
Connection for Water Regulating Valve
DIGIT 12: BLOWER
CONFIGURATION
1 = Standard Blower Motor
2 = High Static Blower Motor
A = Drive Package A (GEH/GEV)
B = Drive Package B (GEH/GEV)
DIGITS 30-36: DOES NOT APPLYTO
GEH or GEV
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General Data
Table G1: General Data - GEH 006 to 018
Model GEH
006
009
012
015
018
40 x 15 x 20
40 x 15 x 20
40 x 15 x 20
46 x 17 x 23
46 x 17 x 23
1168 x 432 x 584
Unit Size (in/mm)
Length x Height x Depth
1016 x 381 x 508 1016 x 381 x 508 1016 x 381 x 508 1168 x 432 x 584
CompressorType
Rotary
Rotary
Rotary
Rotary
Reciprocating
Approx. weight
188 / 158
188 / 158
188 / 158
188 / 158
278 / 248
with pallet/without pallet (lbs/kg)
85.3 / 71.7
85.3 / 71.7
85.3 / 71.7
85.3 / 71.7
126.1 / 112.5
14-5/8 x 20-1/4
375 x 517
14-5/8 x 20-1/4
375 x 517
14-5/8 x 20-1/4
375 x 517
14-5/8 x 20-1/4
425 x 603
16-3/8 x 23-5/8
425 x 603
Filter Size (nominal in/mm)
9 x 4
229 x 102
9 x 4
229 x 102
9 x 4
229 x 102
9 x 4
229 x 102
9 x 6
229 x 152
Blower Wheel (in/mm) (Direct Drive)
Water in/out (FPT) (in/mm)
1/2 / 12.5
3/4 / 19
1/2 / 12.5
3/4 / 19
1/2 / 12.5
3/4 / 19
1/2 / 12.5
3/4 / 19
3/4 / 19
3/4 / 19
Condensate size (NPTI) (in/mm)
Table G2: General Data - GEH 024 to 048
Model GEH
024
030
036
042
048
46 x 17 x 23
1168 x 381 x 508
46 x 17 x 23
50 x 19 x 25
50 x 19 x 25
58 x 21 x 33
1473 x 533 x 838
Unit Size (in/mm)
Length x Height x Depth
1168 x 381 x 508 1270 x 483 x 635 1270 x 483 x 635
CompressorType
Reciprocating
Reciprocating
Reciprocating
Reciprocating
Reciprocating
Approx. weight
278 / 248
278 / 248
318 / 288
318 / 288
428 / 398
with pallet/without pallet (lbs/kg)
126.1 / 112.5
126.1 / 112.5
144.2 / 130.6
144.2 / 130.6
184.1 / 180.5
16-3/8 x 23-5/8
425 x 603
16-3/8 x 23-5/8
425 x 603
18-5/8 x 25-3/8
476 x 647
18-5/8 x 25-3/8
476 x 647
20-5/8 x 29-3/4
524 x 756
Filter Size (nominal in/mm)
10 x 6
254 x 102
10 x 6
254 x 102
12 x 8
305 x 203
12 x 8
305 x 203
12 x 11
305 x 279
Blower Wheel (in/mm) (Direct Drive)
Water in/out (FPT) (in/mm)
3/4 / 19
3/4 / 19
3/4 / 19
3/4 / 19
3/4 / 19
3/4 / 19
1.0 / 25
3/4 / 19
1.0 / 25
3/4 / 19
Condensate size (NPTI) (in/mm)
Table G3: General Data - GEH 060 to 150
Model GEH
060
072
090
120
150
58 x 21 x 33
40-3/4 x 21x 79
40-3/4 x 21x 79
40-3/4 x 21x 79
46-3/4x28x85
Unit Size (in/mm)
Length x Height x Depth
1473 x 533 x 838 1035 x 533 x 2006 1035 x 533 x 2006 1035 x 533 x 2006 1187 x 711 x 2159
CompressorType
Scroll
Reciprocating
Reciprocating
Scroll
Scroll
Approx. weight
428 / 398
701 / 652
714 / 666
831 / 798
907 / 865
with pallet/without pallet (lbs/kg)
184.1 / 180.5
318.2 / 296
324.1 / 302.3
377 / 362.2
411.7 / 392.7
20-5/8 x 29-3/4
524 x 756
19-5/8 x 24-5/8 (x2) 19-5/8 x 24-5/8 (x2) 19-5/8 x 24-5/8 (x2) 24-5/8 x 24-5/8 (x3)
Filter Size (nominal in/mm)
498 x 651
498 x 651
498 x 651
651 x 651
12 x 11
305 x 279
12.6 x 12.6
321 x 321
12.6 x 12.6
321 x 321
12.6 x 12.6
321 x 321
15 x 15
381 x 381
Blower Wheel (in/mm) (Direct Drive)
Water in/out (FPT) (in/mm)
1.0 / 25
3/4 / 19
1-1/4 / 31.8
3/4 / 19
1-1/2 / 38.1
3/4 / 19
1-1/2 / 38.1
3/4 / 19
1-1/2 / 38.1
3/4 / 19
Condensate size (NPTI) (in/mm)
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General Data
Table G4: General Data - GEV 006 to 018
Model GEV
006
009
012
015
018
21-1/2x31-1/4x19-1/5 21-1/2x31-1/4x19-1/5 21-1/2x31-1/4x19-1/5 21-1/2x31-1/4x19-1/5 21-1/2x38-1/4x21-1/2
Unit Size (in/mm)
Length x Height x Depth
546 x 793 x 495
546 x 793 x 495
546 x 793 x 495
546 x 793 x 495
546 x 997 x 546
CompressorType
Rotary
Rotary
Rotary
Rotary
Reciprocating
Approx. weight
with pallet/without pallet (lbs/kg)
188 / 158
85 / 71
188 / 158
85 / 71
188 / 158
85 / 71
188 / 158
85 / 71
278 / 248
121 / 112
15-7/8 x 19-7/8
403 x 505
15-7/8 x 19-7/8
403 x 505
15-7/8 x 19-7/8
403 x 505
15-7/8 x 19-7/8
403 x 505
17-7/8 x 24-7/8
454 x 632
Filter Size (nominal in/mm)
Blower Wheel (in/mm)
(Direct Drive)
9 x 4
229 x 102
9 x 4
229 x 102
9 x 4
229 x 102
9 x 4
229 x 102
9 x 6
229 x 152
Water in/out (FPT) (in/mm)
1/2 / 12.5
3/4 / 19
1/2 / 12.5
3/4 / 19
1/2 / 12.5
3/4 / 19
1/2 / 12.5
3/4 / 19
3/4 / 19
3/4 / 19
Condensate size (NPTI) (in/mm)
Table G5: General Data - GEV 024 to 048
Model GEV
024
030
036
040
042
21-1/2x38-1/4x21-1/2 21-1/2x38-1/4x21-1/2 26-1/2x41-7/8x24-1/2 21-1/2x38-1/4x21-1/2 26-1/2x41-7/8x24-1/2
Unit Size (in/mm)
Length x Height x Depth
546 x 997 x 546
546 x 997 x 546
673 x 1063 x 622
546 x 997 x 546
673 x 1063 x 622
CompressorType
Reciprocating
Reciprocating
Reciprocating
Reciprocating
Reciprocating
Approx. weight
with pallet/without pallet (lbs/kg)
268 / 248
121 / 112
268 / 248
121 / 112
308 / 288
94 / 131
268 / 248
121 / 112
308 / 288
94 / 131
17-7/8 x 24-7/8
454 x 632
17-7/8 x 24-7/8
454 x 632
19-7/8 x 24-7/8
505 x 632
17-7/8 x 24-7/8
454 x 632
19-7/8 x 24-7/8
505 x 632
Filter Size (nominal in/mm)
Blower Wheel (in/mm)
(Direct Drive)
10 x 6
254 x 102
10 x 6
254 x 102
10 x 6
254 x 102
10 x 6
254 x 102
12 x 8
305 x 203
Water in/out (FPT) (in/mm)
3/4 / 19
3/4 / 19
3/4 / 19
3/4 / 19
3/4 / 19
3/4 / 19
3/4 / 19
3/4 / 19
3/4 / 19
3/4 / 19
Condensate size (NPTI) (in/mm)
Table G6: General Data - GEV 048 to 060
Model GEV
048
060
30-1/2x46-7/8x26-1/2
774 x 1191 x 673
30-1/2x46-7/8x26-1/2
774 x 1191 x 673
Unit Size (in/mm)
Length x Height x Depth
CompressorType
Reciprocating
Scroll
Approx. weight
with pallet/without pallet (lbs/kg)
396 / 348
178 / 158
396 / 348
178 / 158
27-7/8 x 29-7/8
708 x 759
27-7/8 x 29-7/8
708 x 759
Filter Size (nominal in/mm)
10 x 10 (DD - Std) / 254 x 254
12 x 11 (Hi) / 305 x 279
Blower Wheel (in/mm) (Direct Drive)
12 x 11 (Std) / 305 x 279
Water in/out (FPT) (in/mm)
1 / 25
1 / 25
Condensate size (NPTI) (in/mm)
3/4 / 19
3/4 / 19
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General Data
Table G7: General Data - GEV 072 to 180
Model GEV
072
090
120
150
180
42 x 62-5/8 x 36-1/4 42 x 62-5/8 x 36-1/4 42 x 62-5/8 x 36-1/4 81-5/8 x 68 x 36-1/4 81-5/8 x 68 x 36-1/4
Unit Size (in/mm)
Length x Height x Depth
1067 x 1591 x 921
1067 x 1591 x 921
1067 x 1591 x 921
2073 x 1727 x 921 2073 x 1727 x 921
CompressorType
Reciprocating (2)
Reciprocating (2)
Scroll (2)
Scroll (2)
Scroll (2)
Approx. weight
with pallet/without pallet (lbs/kg)
617 / 577
280 / 262
648 / 608
294 / 276
861 / 821
391 / 373
1215 / 1170
552 / 531
1225 / 1180
556 / 536
19-5/8 x 19-5/8 (4)
498 x 498 (4)
19-5/8 x 19-5/8 (4)
498 x 498 (4)
19-5/8 x 19-5/8 (4)
498 x 498 (4)
19-5/8 x 24-5/8 (6) 19-5/8 x 24-5/8 (6)
Filter Size (nominal in/mm)
498 x 625 (6)
498 x 625 (6)
Blower Wheel (in/mm)
(Direct Drive)
12.625 x 12.625
321 x 321
12.625 x 12.625
321 x 321
12.625 x 12.625
321 x 321
15 x 15
381 x 381
15 x 15
381 x 381
Water in/out (FPT) (in/mm)
1-1/4 / 32
3/4 / 19
1-1/4 / 32
3/4 / 19
1-1/2 / 38
3/4 / 19
1-1/2 / 38
3/4 / 19
1-1/2 / 38
3/4 / 19
Condensate size (NPTI) (in/mm)
Table G8: General Data - GEH 240
Model GEH
240
81-5/8 x 68 x 36-1/4
2073 x 1727 x 921
Unit Size (in/mm)
Length x Height x Depth
CompressorType
Scroll (2)
Approx. weight
with pallet/without pallet (lbs/kg)
1615 / 1580
733 / 717
19-5/8 x 24-5/8 (6)
498 x 625 (6)
Filter Size (nominal in/mm)
15 x 11 (2) / 12.625 x 12.625 (2)
381 x 279 (2) / 321 x 321 (2)
Blower Wheel (in/mm) (Direct Drive)
(Regular / High Static)
Water in/out (FPT) (in/mm)
2 / 51
Condensate size (NPTI) (in/mm)
3/4 / 19
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General Data
Air-to-Refrigerant Coils
Table G9: GEH/GEV 006
Table G13: GEV 015, 018, 024, 030
Working Pressure
Tubes High
Tubes Deep
No. of Circuits
Finned vol. (in/mm)
(H x W x D)
Coil Surface Area (Ft2)
Fins Per Inch
425
14
2
1
Working Pressure
Tubes High
Tubes Deep
No. of Circuits
Finned vol. (in/mm)
(h,w,d)
425
21
4
4
14 x 16 x 1.734
356 x 406 x 44
1.56
21 x 16 x 3.464
533 x 406 x 88
2.33
Coil Surface Area (Ft2)
Fins Per Inch
12
12
Tube Material
Tube OD (in/mm)
WallThickness
Return Bends
Copper
3/8 / 10
0.014
Tube Material
Tube OD (in/mm)
WallThickness
Return Bends
Copper
3/8 / 10
0.014
Copper
Copper
Table G10: GEH/GEV 009
Table G14: GEH/GEV 030, 036
Working Pressure
Tubes High
Tubes Deep
425
14
3
Working Pressure
Tubes High
Tubes Deep
425
18
4
No. of Circuits
2
No. of Circuits
6
Finned vol. (in/mm)
(h,w,d)
Coil Surface Area (Ft2)
Fins Per Inch
14 x 16 x 2.598
356 x 406 x 66
Finned vol. (in/mm)
(h,w,d)
Coil Surface Area (Ft2)
Fins Per Inch
18 x 21 x 3.464
457 x 533 x 88
2.63
1.56
12
12
Tube Material
Tube OD (in/mm)
WallThickness
Return Bends
Copper
3/8 / 10
0.014
Tube Material
Copper
3/8 / 10
0.014
Tube OD (in/mm)
WallThickness
Return Bends
Copper
Copper
Table G11: GEH/GEV 012
Table G15: GEH 042, 048
Working Pressure
Tubes High
Tubes Deep
425
20
4
Working Pressure
Tubes High
Tubes Deep
425
14
3
No. of Circuits
8
No. of Circuits
1
Finned vol. (in/mm)
(h,w,d)
20 x 29 x 3.464
508 x 737 x 88
Finned vol. (in/mm)
(h,w,d)
14 x 16 x 2.598
356 x 406 x 66
Coil Surface Area (Ft2)
Fins Per Inch
1.56
12
Coil Surface Area (Ft2)
Fins Per Inch
4.03
12
Tube Material
Copper
3/8 / 10
0.014
Tube Material
Copper
3/8 / 10
0.014
Tube OD (in/mm)
WallThickness
Return Bends
Tube OD (in/mm)
WallThickness
Return Bends
Copper
Copper
Table G12: GEH 015, 018, 024
Table G16: GEV 042, 048
Working Pressure
Tubes High
Tubes Deep
425
16
4
Working Pressure
Tubes High
Tubes Deep
425
24
4
8
No. of Circuits
4
No. of Circuits
24 x 25 x 3.464
610 x 635 x 88
4.17
Finned vol. (in/mm)
(h,w,d)
16 x 19 x 3.464
406 x 483 x 88
Finned vol. (h,w,d)
Coil Surface Area (Ft2)
Fins Per Inch
Coil Surface Area (Ft2)
Fins Per Inch
2.11
12
12
Tube Material
Copper
3/8 / 10
0.014
Tube Material
Copper
3/8 / 10
0.014
Tube OD (in/mm)
WallThickness
Return Bends
Tube OD (in/mm)
WallThickness
Return Bends
Copper
Copper
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General Data
Air-to-Refrigerant Coils
Table G17: GEH/GEV 060 (2-compr. circuit)
Table G20: GEH/GEV 120 (2-compr. circuit)
Working Pressure
Tubes High
Tubes Deep
425
Working Pressure
Tubes High
Tubes Deep
425
18 (GEH)/ 24 (GEV)
24 (GEH) / 28 (GEV)
4 (GEH) / 2 (GEV)
4
No. of Circuits
6 refrig flow paths (2X)
8 refrig flow paths-2X (GEH)
7 refrig flow paths-2X (GEV)
24 x 73 x 3.464 / 609 x 1854 x 88 (GEH)
28 x 73 x 1.734 / 711 x 1854 x 44 (GEV)
No. of Circuits
Finned vol. (in/mm)
(h,w,d)
18 x 48 x 3.464 / 457 x 1219 x 88 (GEH)
24 x 34 x 3.464 / 609 x 864 x 88 (GEV)
Finned vol. (in/mm)
(h,w,d)
Coil Surface Area (Ft2)
Fins Per Inch
6.00 (GEH)
5.67 (GEV)
Coil Surface Area (Ft2)
12.167 (GEH) / 14.19 (GEV)
14
Fins Per Inch
14
Tube Material
Copper
3/8 / 10
0.014
Tube Material
Tube OD (in/mm)
WallThickness
Return Bends
Copper
3/8 / 10
0.014
Tube OD (in/mm)
WallThickness
Return Bends
Copper
Copper
Table G21: GEH/GEV 150/180 (2-compr. circuit)
Table G18: GEH/GEV 072 (2-compr. circuit)
Working Pressure
Tubes High
425
Working Pressure
Tubes High
425
24 (GEH) / 32 (GEV)
4 (GEH) / 3 (GEV)
18 (GEH)/ 28 (GEV)
4
Tubes Deep
Tubes Deep
8 refrig flow paths-2X (GEH)
9 refrig flow paths-2X (GEV)
6 refrig flow paths-2X (GEH)
7 refrig flow paths-2X (GEV)
No. of Circuits
No. of Circuits
Finned vol. (in/mm)
(h,w,d)
24 x 73 x 3.464 / 609 x 1854 x 88 (GEH)
32 x 73 x 2.598 / 813 x 1854 x 66 (GEV)
Finned vol. (in/mm)
(h,w,d)
18 x 54 x 3.464 / 457 x 1372 x 88 (GEH)
28 x 34 x 3.464 / 711 x 864 x 88 (GEV)
Coil Surface Area (Ft2)
Fins Per Inch
12.167 (GEH) / 16.22 (GEV)
Coil Surface Area (Ft2)
Fins Per Inch
6.75 (GEH) / 6.61 (GEV)
14
14
Tube Material
Copper
3/8 / 10
0.014
Tube Material
Copper
3/8 / 10
0.014
Tube OD (in/mm)
WallThickness
Return Bends
Tube OD (in/mm)
WallThickness
Return Bends
Copper
Copper
Table G19: GEH/GEV 090 (2-compr. circuit)
Table G22: GEV 240 (2-compr. circuit)
Working Pressure
Tubes High
425
18 (GEH) / 36 (GEV)
4
Working Pressure
Tubes High
425
36
4
Tubes Deep
Tubes Deep
No. of Circuits
9 refrig flow paths (2X)
No. of Circuits
18 refrig flow paths (2X)
Finned vol. (in/mm)
(h,w,d)
36 x 73 x 3.464
914 x 1854 x 88
Finned vol. (in/mm)
(h,w,d)
18 x 73 x 3.464 / 457 x 1854 x 88 (GEH)
36 x 34 x 3.464 / 914 x 864 x 88 (GEV)
Coil Surface Area (Ft2)
Fins Per Inch
18.25
14
Coil Surface Area (Ft2)
Fins Per Inch
9.125 (GEH) / 8.50 (GEV)
14
Tube Material
Copper
3/8 / 10
0.014
Tube Material
Copper
3/8 / 10
0.014
Tube OD (in/mm)
WallThickness
Return Bends
Tube OD (in/mm)
WallThickness
Return Bends
Copper
Copper
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Features and
Benefits
ment may be field converted through a
Design Advantages
service kit to aid in stocking of a single
unit variation. See Figure 2 for compo-
nent platform location.
The horizontal and vertical configura-
tios range in capacities from 1/2 to 5
tons.The innovative designs offers
superior field flexibility at the jobsite
along with service accessibility.
GEH 1/2 to 5-Ton Cabinet
The GEH cabinet design includes a
modular platform that utilizes similar
parts and assemblies throughout the
product line. It is constructed of heavy
gauge (non-painted) galvanized metal
for maximum durability and corrosive
resistive exterior.
The cabinet front allows service access
for the controls and refrigeration cir-
cuitry. Water-in/out connection and
high/low voltage hook-up is accom-
plished at the 45-degree corners on the
front-side of the equipment.
Figure 1: GEH Component platform location
The unit offers six product variations of
return-air and supply-air combinations
which may be order-specific or job-site
modified. See Figure 1 component plat-
form location.
GEV 1/2 to 5-Ton Cabinet
The vertical design, model GEV
includes a modular platform utilizing
similar parts and assemblies to the hor-
izontal to provide a repetitious look and
feel for installation and maintenance
personnel. It is constructed of heavy
gauge (non-painted) galvanized metal
for maximum durability and corrosive
resistive exterior.
The cabinet front allows service access
for the controls and refrigeration cir-
cuitry. Water-in/out connection, drain
connection, and high/low voltage hook-
up is accomplished at the 45-degree
chamfered corners on the front-side of
the equipment.The vertical design
offers four product variations of return-
air and supply-air combinations.
Figure 2: Component platform
location
The GEV model’s supply air arrange-
Figure 3 Large ton GEH air side
combinations.
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Features and
Benefits
The GEV model is also capable of on-
site modifications. With the vertical con-
figuration, the supply-air is easily con-
verted from a top supply-air to a back
supply-air with a service retrofit kit.The
return-air option is order specific.There
are four combinations. See Figure 5 for
the four GEV supply/reutm air options.
GEH/GEV 6 to 20-Ton Cabinet
The cabinet design incorporates sturdy
(non painted) galvanized metal form
maximum durability and corrosive
resistive exterior.The equipment offers
superior installation flexibility with
service accessibility.
The cabinet front allows service access
for the controls.The new horizontal and
vertical design offers four product vari-
ations of return-air and supply-air com-
binations. All combinations are order
specific and may not be modified at the
Airflow Options: 6 to 20-ton
The 6 through 12-1/2-ton horizontal’s
airflow flexibility includes four combi-
nations to aid in applications where the
equipment is required to hug a corridor
job site. See Figure 3 for air side combi- or wall. See Figure 3 for the four verti-
Figure 5: Four GEV airflow
combinations
nations.
cal configurations (previous page).
Hanging the horizontal configuration is
accomplished through the robust metal
stiffeners located beneath the unit.
Optional vibration isolators are avail-
able to help decrease sound vibration
during equipment operation.
The sleek, narrow cabinet of the 6 to
20-ton vertical is designed to fit through
a standard doorway for installation dur-
ing new or retrofit construction.The
equipment is available in four supply-
air/return-air combinations.These com-
binations are order specific via the unit
model number. See Figure 6 for the
four vertidcal airflowvcombinations.
Airflow Options: 1/2 to 5 ton
The GEH model configuration may be
built to order or modified on-site to
meet unique installation requirements.
The six combinations include same-
side supply and return air capabilities
for added installation flexibility. See
Figure 4 for the six field convertible
combinations.
Figure 6: Four large-ton GEV airflow
combinations
Figure 4: Six field convertible
Unit Front
Unit Front
Unit Front
GEH airflow combinations
Unit Front
Unit Front
Unit Front
Supply Air
Return Air
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Features and
Benefits
Hanging Device: 1/2 to 5-ton
The hanging bracket resides in the
chamfered corner of the horizontal 1/2 to
Drain Pan
The unit drain pan is composed of plas-
tic, corrosive resistive material.The pan
5 ton equipment.This partially-concealed is positively sloped to comply with
bracket design eliminates added height,
width, or length to the product.The
brackets are factory mounted to shorten
job installation requirements.
ASHRAE 62 for (IAQ) indoor air quality
conformity. See Figure 9 to view the
plastic drain pan.
Cabinet Insulation
The structural integrity of the design
helps assure no bracket deflection or
unit bowing from the unit’s weight.
Field return-air hook-up and filter main-
tenance are more simplistic. Isolation for
the hanging bracket is provided with a
neoprene rubber grommet design.This
isolation device helps prevent sound
vibration from reaching the structural
support members of the building during
compressor start and stop. See Figure 7
for isolation device.
All model cabinet insulation design
meets UL 181 requirements.The air
stream surface of the insulation is fabri-
cated of a non-biodegradable source.
Figure 7: Hanging bracket design
Figure 8: Large ton GEV panel design
Figure 9: Plastic drain pan
Refrigeration Piping
The unit’s copper tubing is created from
a 99% pure copper formation that con-
forms to the American Society ofTesting
(ASTM) B743 for seamless, light-
annealed processing.
The unit’s copper refrigeration system is
designed to be free from contaminants
and conditions such as drilling frag-
ments, dirt, or oil.This excludes the pos-
sibility of these contaminants from dam-
aging the compressor motor.
Hanging Device: 6 to 12-1/2-ton
The hanging channel for the horizontal
unit runs the length of the equipment.
The structural integrity of the design
helps assure no bracket deflection or
unit bowing from the unit’s weight.
Optional isolation for the hanging brack-
et is provided with a itrile rubber grom-
met design.This isolation device helps
prevent sound vibration from reaching
the structural support members of the
building during compressor start and
stop.
Compressor: 1/2 to 5-ton
The unit’s design includes a wide variety
of compressor motors to accommodate
dedicated voltages and tonnage sizes.
For more details, See General Data
Tables, pages 5-7.
Access Panels: 12-1/2 to 20-ton
The upper panels of the 12 1/2 through
20-ton verticals feature a key hole hang-
ing design for ease of maintenance of
the unit, allowing the panel to be hooked
into place when attaching the panel to
the unit.The panels are also sealed with
a rubber gasket at all four edges to help
eliminate air from escaping around the
panel’s edge. See Figure 8 for GEV panel
design.
Figure 10: Reciprocating compressor
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Features and
Benefits
Thread (NFPT) junction.The connections
are attached to the unit’s chamfer corner
to alleviate the need for a back-up
wrench during installation. See Figure 12
for water connection device.
Schrader Connections:
1/2 to 5-ton
The connections for the low and high
side of the refrigeration system are
located directly beside the control box at
the front, service access panel. See
Figure 11 for schrader connection lotion.
Water Connections: 6 to 20-ton
Water hookups for the 6 through 20 ton
units are located internal to the equip-
ment to help alleviate damage to the
water copper during shipment or job
storage of units prior to installation.
Each unit (although dual circuited) con-
tains a single supply and return water
connection. See Figure 13 for large ton-
nage water hook-up, model GEV. Fittings
for the supply and return are internally
threaded.
Co-axial Water-to-Refrigerant
Coil
The unit’s internal heat exchanging
water coil is engineered for maximum
heat transfer.
Figure 11: Schrader connections
The copper or cupro-nickel seamless
tubing is a tube within a tube design.
The inner-water tube contains a deep
fluted curve to enhance heat transfer
and minimize fouling and scaling. It is
available in either copper or cupro-nickel
(selectable option) coil.The outer refrig-
erant gas tube is made from steel mate-
rial.The coil is leak tested to assure there
is no cross leakage between the water
tube and the refrigerant gas (steel tube)
coil. Co-axial heat exchangers are more
tolerant to freeze rupture. See Figure 11
for co-axial water coil.
Expansion Valve
AllTrane water-source systems include
an expansion valve flow metering
device.This thermal expansion valve
(TXV) allows the unit to operate with an
entering fluid temperature from 25 F (3.9
C) to 110 F (43 C), and entering air tem-
peratures from 40 F (4.4 C) to 90 F (32 C).
The valve is designed to meter refriger-
ant flow through the circuitry to achieve
desired heating or cooling.
Figure 12: Water connections - small
ton
Compressor and Co-axial Coil
Isolation: 1/2 to 5 ton
The expansion valve device allows the
exact amount of refrigerant required to
meet the coil load demands.This precise
metering by theTXV increases the effi-
ciency of the unit.
Vibration isolation of the compressor
and co-axial water coil is accomplished
by increasing the rigidity and stiffness at
the base.The platform provides double
isolation to the compressor and single
isolation to the co-axial water coil for
additional attenuation during compres-
sor start and stop.
Reversing Valve
Figure 13: Water connections - large
ton
A system reversing valve (4-way valve)
is included with all heating/cooling units.
This valve is piped to be energized in the
cooling mode to allow the system to
provide heat if valve failure were to
occur. Once the valve is energized for
cooling, it will remain energized until the
control system is turned to the OFF posi-
tion, or a heating cycle is initiated.
Units with the cooling only option will
not receive a reversing valve.
Water Connections: 1/2 to 5-ton
The water-in/water-out connections to
the co-axial water coil are located on the
right-hand chamfered corner of the unit.
The fittings are mounted flush to the
chamfered wall to help limit shipping
damage.
The water connection devices are con-
structed of copper or bronze material
and include a National Female Pipe
Figure 14:Thermal expansion valve
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Features and
Benefits
Access to the 6 through 25 ton units is
made through the back of unit by way
of two panels, and/or through a side
access panel if adjustment to the motor
belt or motor base are needed.
Blower Motor: 1/2 to 5 ton
The supply-air (blower) motor is a
multi-speed motor with internal ther-
mal overload protection.The motor
bearings are permanently lubricated
and sealed.
Blower Housing
All motors are factory wired to the
option selected. A high, medium, and
low speed tap is provided for field cus-
tomization on most voltages.The speed
tap modification can be made in the
control box of the unit. See Figure 15
for blower motor.
The blower housing is constructed of
non-corrosive galvanized steel. A facto-
ry-mounted orifice ring is provided for
ease of motor serviceability on the 1/2
through 5-ton direct drive units.
All air-side panels are interchangeable
with one another for ease of field con-
vertibility of the supply-air on the GEH
model.
Figure 15: 1/2 to 5-ton blower motor
Note:The three-phase designs are pro-
vided in a dual or three-speed version
only. See fan performance section for
factory ratings.
Air-Side Filter
The air-side filter incorporates several-
fiberglass options.These filters include
an average synthetic dust weight
arrestance of approximately 75%.This
dust holding capability includes a color-
less, odorless adhesive to retain dirt
particles within the filter media after
fiber contact.
Serviceability to the motor is made
through either of the two air-side
access doors for the horizontal configu-
ration, and through one air-side access
door on vertical configuration.The
motor and blower wheel are removable
by an orifice ring mounted to the fan
housing.
Figure 16: 6 to 20-ton blower motor
and fan belt assembly.
Air-to-Refrigerant Coil
The air-to-refrigerant heat exchanger is
constructed of staggered copper tubes
with die-formed corrugated lanced alu-
minum fins.The fins are then mechani-
cally bonded to the tubes through
expansion.
Blower Motor: 6 to 20 ton
A belt driven motor selection powers
the fan for the 6 through 20 ton dual
circuit units.The 6 through 12-1/2 ton
units include a single fan assembly.The
15 and 20-ton units include dual fan
assemblies. Because the motor sheave
and the motor base are adjustable in
the field, a greater variation in external
static pressures are available.
The coil is placed internal of the unit
design for the GEH model to provides
an optional dual filtration application.
With dual filtration to the GEH unit,
maintenance to the filter is significantly
less than with a single filtration system.
This design also offers maximum flexi-
blity of the supply and return air config-
urations.
The large tonnage units are capable of
providing 0 ESP to 3.0 ESP allowing a
higher static ductwork to be applied on
the mechanical system when the appli-
cation requires extensive ductwork
design.This is a low cost alternative to
purchasing, installing, and maintaining
multiple smaller tonnage units to meet
the required air flow demand for the
space.
The maximum working pressure for
both the GEH and GEV coils is 450 psig.
It is designed for maximum capacity
with an additional benefit of physical
unit size reduction.
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Features and
Benefits
Boilerless Control/Electric Heat
(option)
The boilerless electric heat option is
composed of a nichrome open wire
design.
This single stage of electric heat is
used as a primary heating package
to lock out compressor operation in
the event that entering-water tempera-
tures reach below 58 F (14.4 C).
On a call for heating, the electric heater
is activated, locking out the compres-
sor. Once the entering water tempera-
ture rises, above 58 F (14.4 C), the unit
resumes normal compressor heating
operation.
For geothermal applications, the
boilerless controller is adjustable.
The ranges are 25, 35, 45, 55, and
60-degrees F (-3 .9 , 1.7, 7.2, 12.8 ,
15.6 C).Trane factory sets the controller
to 55-degrees F prior to shipment.
See Figure 17 for boilerless
Figure 17: Boilerless control/electric heat diagram
If the water-source system
design contained an econo-
mizing coil option, the mod-
erate temperature loop
water circulated through a
core water-source system
can provide an inexpensive
means to satisfy room com-
fort without operating the
water-source heat pump’s
compressor.
control/electric heat diagram.
Waterside Economizer (option)
The beauty of the waterside economiz-
er is it’s ability to take advantage of any
loop condition that results in cool water
temperatures. A prime example would
be during fall, winter and spring when
cooling towers have more capacity
than required and could be controlled
to lower temperatures for economizer
support.
During economizer mode,
fluid enters the unit, and
passes by a water tempera-
ture sensing bulb.This tem-
perature sensing bulb deter-
Another more common inexpensive
means of free comfort cooling includes
buildings systems where perimeter
heating and core cooling are needed. In
this system, the perimeter units extract
heat from the building loop while in the
heating mode, forcing the building loop
temperature to drop. Where as, the core
are of a building may require cooling in
summer or in winter based upon light-
ing, people and equipment.
Figure 18: Model GEH with Waterside Economizer
package
mines whether the two posi-
tion, three-way valve will
direct the water through the
Mechanical cooling will continue on a
call for second stage from the thermo-
stat.The factory built waterside econo-
mizer is available on all 1/2 to 5 ton
GEH models.The 1/2 through 5-ton GEV
may be ordered to accept a field pro-
vided waterside economizing package.
See Figure 18: Model GEH with
waterside economizing coil, and to the
heat pump condenser, or through the
condenser only. If the water tempera-
ture is 55 F or less, fluid will flow into
the economizing coil, while simultane-
ously halting mechanical operation of
the compressor.
Waterside Economizer package.
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Features and
Benefits
Hot Gas Reheat (option)
Proper Hot Gas Design
For space conditioning and climate con- The factory installed hot gas reheat
trol,Trane provides an accurate and
cost effective dehumidification control
through a hot gas reheat option.This
option is designed to accommodate
option is only available with Deluxe or
ZN524 controls packages.
A high static blower motor option will
unit sizes 012, 036, 060 and 072 through be required to support the hot gas
240.
reheat option for the 1/2 through 5 ton
equipment.
With this reheat option, the return air
from the space is conditioned by the
air-to-refrigerant coil, then reheated by
the reheat coil to control not only the
space temperature, but to also reduce
the relative humidity of the space.The
moisture removal capability of a specif-
Water regulating valves should not be
used with the hot gas reheat option.
Trane places a thermal expansion valve
on all water-source heat pumps, as well
as ground-source heat pumps, to regu-
late refrigerant flow vs. water flow,
ic heat pump is determined by the units making the heat pump more efficient to
latent capacity rating.
run.
When operating in the reheat mode
(meaning the sensible temperature has
been met in the space), the humidistat
signals the reheat relay coil to energize,
allowing the high pressure refrigerant
gas to flow from the (1) compressor,
through the (2) reheat valve, into the
(3) reversing valve, or through the (4)
reheat coil for dehumidification (See
Figure 19). A switching relay has been
provided for the reheat application to
adjust the blower motor from normal
operation to low speed when hot gas
reheat is energized.
Water-source heat pumps with hot gas
reheat should not be used as a make-
up air unit.
Note:Trane places an air separation
space between the air-to-refrigerant
coil, and the reheat coil to allow for
maximum moisture removal.
Common Reheat Applications
The hot gas reheat option is designed
to support building applications requir-
ing fresh-air ventilation units delivering
unconditioned-air directly to the space.
It also provides dehumidification to
large latent load spaces such as audito-
riums, theaters and classrooms, or any-
where humidity control is a problem.
Figure 19: Hot gas reheat heat pump option.
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Features and Benefits
Controls
Controls byTrane
Whether involved in a retrofit or new construction application,Trane has the control design to fit your system requirement.
Our control options provide a broad range of packages from the most cost efficient 24 volt standalone to a complete building
automation solution,Trane is the right choice in comfort gratification.The following chart provides a brief overview in the dif-
ferent control combinations.
Control
Graphic
Description
Application
ICS
Protocol
Retrofit market where single and
multiple unit replacement occurs.
Non-
Applicable
Compressor lockout relay, low
and high pressure switches.
No
Basic 24V
New building design where field
provided controls are specified.
24 volt microprocessor
Retrofit market where single and
designed to provide control of multiple unit replacement occurs.
the entire unit, as well as multi-
ple relay offerings to maximize Multi-unit installation where units
Non-
Applicable
No
Deluxe 24V
system performance. Can con- may be daisy- chained directly to
TM
nect to a 24V thermostat.
theTraneTracer Loop Controller.
Retrofit market where overall sys-
tem upgrade is specified.
Direct Digital Control board
designed to provide control of
the entire unit as well as out-
puts for unit status and fault
detection.
SCC LonTalk®
open protocal
(Comm 5)
TM
Multi-unit (100+) installation where
units are linked by a common twist-
ed pair of wire for a communication
link.
Yes
Yes
Yes
Tracer ZN510
Retrofit market where overall sys-
tem upgrade is specified.
Direct Digital Control board
designed to provide control of
the entire unit as well as out-
puts for unit status and fault
detection.
SCC LonTalk®
open protocal
(Comm 5)
TM
Multi-unit (100+) installation where
units are linked by a common twist-
ed pair of wire for a communication
link.
Tracer ZN524
Wherever theTracer ZN510 controls
or 24 volt electro-mechanical
controls are specified for complete
control of the water loop and
pumps.
Microprocessor-based
LonTalk
compatible
(Comm 5)
TM
Tracer Loop
controller that coordinates the
water side (boiler, pumps, cool-
ing tower, etc.) of a water-
source heat pump system.
Controller
Microprocessor-based
Wherever theTracer ZN510 controls
or 24 volt electro-mechanical
controls are specified for complete
control of the water loop and
pumps.
controller that coordinates boil-
er, pumps, cooling tower, etc.
of a water-source heat pump
system. Customized alarms,
scheduling, trending, safety
features.
LonTalk
compatible
(Comm 5)
TM
Tracker
Yes
Yes
New and retro fit light commercial
applications.
Controls up to 100 wshp’s.
Microprocessor based
controller that coordinates full
building automation from
HVAC to lighting.
BACnet
(Comm 2, 3, 4,
& 5)
Tracer
Where any controller is specified.
Summit®
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Features and Benefits
Basic Controls
excessive discharge pressures that
exceed 395 psig.
Basic 24 Volt Controls
The basic 24 V electromechanical unit
control provides component protection
devices for maximum system reliability.
Each device is factory mounted, wired
and tested. See Figure 20 for the unit
control box.
A lockout relay provides the mechanical
communication of the low and high
pressure switches to prevent compres-
sor operation if the unit is under low or
high refrigerant circuit pressure, or dur-
ing a condensate overflow condition.
The lockout relay may be reset at the
thermostat, or by cycling power to the
unit.
General alarm is accomplished through
the lockout relay and is used in driving
light emitting diodes.This feature will
drive dry contacts only, and cannot be
used to drive field installed control
inputs. See Figure 21 for unit safety
devices on the basic 24V control unit.
Figure 20: Basic 24-volt control box.
Stand-alone System
The 24 volt electro-mechanical design
may be applied as a stand-alone con-
trol system.The stand-alone design
provides accurate temperature control
directly through a wall-mounted mercu-
ry bulb or electronic thermostat. This
system set-up may be utilized in a
replacement design where a single unit
retrofit is needed. It may be easily inter-
faced with a field provided control sys-
tem by way of the factory installed 18-
pole terminal strip.
Figure 21: BAsic 24-volt safety devices.
Safety Devices
System safety devices are provided
through the use of low/high pressure
switches in the refrigeration circuit to
help prevent compressor damage.The
switch and sensor are set to activate at
refrigerant pressures of 20 psig to fit
most applications.
This stand-alone control is frequently
utilized on small jobs where a building
controller may not be necessary, or
where field installed direct digital con-
trols are specified.This type of control
design does require a constant flow of
water to the water source heat pump.
With a positive way to sense flow to
the unit, the units safety devices will
trigger the unit off.
In cases where a low charge, or exces-
sive loss of charge occurs, each com-
pressor comes equipped with an exter-
nal overload device to halt the com-
pressor operation.
The stand-alone system design pro-
vides a low cost option of installation
while still allowing room control for
each unit. See Figure 22 for 24 volt
stand-alone system controls.
Figure 22: 24-volt stand-alone system.
The high pressure switch prevents
compressor operation during high or
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Features and Benefits
Deluxe Controls
performance to extend the system life.
Each device, is factory mounted, wired,
and tested in the unit. See Figure 23 for
unit control box.
Deluxe 24V Electronic Controls
The deluxe 24V electronic unit control
provides component protection devices
similar to the basic design, but contains
upgraded features to maximize system
Small Building Control
The deluxe 24V electro-mechanical
design may be applied as a stand-alone
control system or as a multi-unit instal-
lation system. With a stand-alone
design, units run independently of one
another with a mercury bulb or elec-
tronic digital thermostat.
With a multiple unit installation, the
units may be daisy-chained directly to
theTraneTracer loop controller (TLC),
pump(s), boiler, and tower for a com-
plete networked water-source system.
TheTLC provides a night setback out-
put, and a pump request input for sys-
tem optimization.See Figure 24 for 24-
volt deluxe control system.
Figure 23: Deluxe 24V control box.
Figure 24: 24-volt deluxe control
system.
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Features and Benefits
Deluxe Controls
sor because of low water flow, peak
limiting or if the unit goes into an unoc- compressor start, the unit will go into
switch is open for 45 seconds during
Microprocessor Design
The 24 volt deluxe design is a micro-
processor-based control board conve-
niently located in the control box. The
board is unique toTrane water-source
products and is designed to control the
unit as well as provide outputs for unit
status and fault detection.
cupied state. Once the compressor has
been disabled, the anti-short cycle time
period will begin. Once the compressor
disable signal is no longer present, and
all safeties are satisfied, the control will
allow the compressor to restart.
soft lockout mode initializing a three
minute time delay and a random start
of 3 to 10 second time delays. Once
these delays have expired, the unit will
be allowed to run. If the low pressure
situation occurs again within 30 min-
utes, and the device is open for more
than 45 seconds, the control will be
placed into a manual lockout mode,
halting compressor operation, and initi-
ating the general alarm.
Generic Relay
The generic relay is provided for field
all necessary terminals for field connec- use. Night setback or pump restart are
TheTrane microprocessor board is fac-
tory wired to a terminal strip to provide
tions. See Figure 27 for the deluxe 24V
control board.
two options that may be wired to the
available relay. (Note: Night setback is
available as factory wired). An external
Class II 24VAC signal will energize the
relay coil on terminals R1 and R2.
Terminals C (common), NO (normally
open), and NC (normally closed) will be
provided for the relay contacts.
In a condensate overflow situation, the
control will go into manual lockout
mode, halting compressor operation,
and initiating the general alarm.
Deluxe 24V features include:
Random Start
The random start relay provides a time
delay start-up of the compressor when
cycling in the occupied mode. A new
start delay time between 3 and 10 sec-
onds is applied each time power is
enabled to the unit.
The general alarm is initiated when the
control goes into a manual lockout
mode for either high pressure, low
pressure or condensate overflow condi-
tions.
Safety Control
The deluxe microprocessor receives
separate input signals from the refriger-
ant high pressure switch, low suction
pressure switch and condensate over-
flow.
Anti-short CycleTimer
Diagnostics
The anti-short cycle timer provides a
three minute time delay between com-
pressor stop and compressor restart.
Component device connections to the
microprocessor board are referenced in
Figure 25.Three LEDs (light emitting
diodes) are provided for indicating the
operating mode of the controller. See
the unit IOM for diagnostics or trou-
bleshooting through the use of the
LEDs.
In a high pressure situation, the com-
pressor contactor is de-energized,
which suspends compressor operation.
The control will go into soft lockout
mode initializing a three minute time
delay and a random start of 3 to 10 sec-
ond time delays. Once these delays
have expired, the unit
will be allowed to run.
If a high pressure situa-
tion occurs within one
hour of the first situa-
Brown-out Protection
The brown-out protection function
measures the input voltage to the con-
troller and halts the compressor opera-
tion. Once a brown-out situation has
occurred, the anti-short cycle timer will
become energized.The general fault
contact will not be affected by this con-
dition.The voltage will continue to be
monitored until the voltage increases.
The compressors will be enabled at this
time if all start-up time delays have
expired, and all safeties have been sat-
isfied.
Figure 25:
Deluxe 24V
control
board.
tion, the control will be
placed into a manual
lockout mode, halting
compressor operation,
and initiating the gener-
al alarm.
Compressor Disable
The compressor disable relay provides
a temporary disable in compressor
operation.The signal would be provid-
ed from a water loop controller in the
system. It would disable the compres-
In a low temperature
situation, the low pres-
sure switch will transi-
tion open after the com-
pressor starts. If the
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Features and Benefits
ZN510 & ZN524 Controls
peer communication environment, data
between similar controllers may be
exchanged without requiring a building
automation system.
Tracer ZN510 & ZN524 Controls
TheTracer ZN510 and ZN524 are direct
digital control (DDC) systems specifical-
ly designed for single and dual circuited
water-source equipment to provide con-
trol of the entire unit, as well as outputs
for unit status and fault detection. Each
device is factory installed, commis-
sioned, and tested to ensure the high-
est level of quality in unit design.
By teaming the ZN510 and ZN524 with
theTLC, a low first-cost for the mechan-
ical equipment, water loop, and water
pump optimization is provided to the
owner.
For owners who require a full building
integrated "open protocol" system,The
ZN510/ZN524/TLC application is
upgradable to support complete build-
ing control throughTracer Summit.
Each of the controller’s features and
options were selected to coordinate
with the unit hardware to provide
greater energy efficiency and equip-
ment safety to prolong the equipment
life.
Because the ZN510 and ZN524 is
LonTalk certified, it is capable of work-
ing with, and talking to other LonTalk
certified controllers providing the build-
ing owner more choices, and the design
engineers more flexibility to meet the
challenges of building automation. See
Figure 26 for ZN510 control box.
In addition to being factory configured
for control of the unit fan, compressor
and reversing valve, the ZN510 and
ZN524 controllers are designed to coor-
dinate the waterside of the water-source
system through theTracer Loop
Controller (TLC). If applied in a peer-to-
Figure 26:
ZN510/ZN524 control box
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Features and Benefits
ZN510 & ZN524 Controls
gized state. In the event of a power fail-
ure or controller OFF situation, the
reversing valve output will default to
the heating (de-energized) state.
during daytime hours of temporary low
Direct Digital Controls
occupancy.To determine the space
occupancy, an occupancy sensor is
applied.
When the ZN510 or ZN524 controller is
linked directly to theTracer Summit,
eachTracer Summit building automa-
tion system can connect a maximum of
120Tracer ZN510 or ZN524 controllers.
See Figure 27 for theTracer ZN524
board.
Fan Operation
In an unoccupied situation, the con-
The supply air fan operates at the facto- troller assumes the building is vacant,
ry wired speed in the occupied or occu-
pied standby mode. When switch is set
to AUTO, the fan is configured for
cycling ON with heating or cooling. In
heat mode, the fan will run for 30 sec-
onds beyond compressor shutdown in
both occupied and unoccupied mode.
normally during evening hours. In the
unoccupied mode, the controller uses
the default unoccupied heating and
cooling setpoints stored in the con-
troller. When the building is in unoccu-
pied mode, individual units may be
manually placed into timed override of
the unoccupied mode at the units wall
sensor. During timed override, the con-
troller interprets the request and initi-
ates the occupied setpoint operation,
then reports the effective occupancy
mode as occupied bypass.
Figure 27:
Tracer
ZN524
board.
Fan RunTimer
The controller’s filter status is based on
the unit fan’s cumulative run hours.The
controller compares the fan run time
against an adjustable fan run hours
limit and recommends unit mainte-
nance as required.
In the occupied bypass mode, the con-
troller applies the occupied heating and
cooling setpoint for a 120 minute time
limit.
Tracer ZN510 and ZN524 functions
include:
Data Sharing
TheTracer ZN510/ZN524 controller is
capable of sending or receiving data
(setpoints, fan request, or space tem-
perature) to and from other controllers
on the communication link.This allows
multiple units to share a common
space temperature sensor in both
stand-alone and building automation
applications.
Compressor Operation
The compressor is cycled on and off to
meet heating or cooling zone demands.
Single and dual compressor units use
the unit capacity and pulse width mod-
ulation (PWM) logic along with mini-
mum on/off timers to determine the
compressor’s operation.The compres-
sor is controlled ON for longer periods
as capacity increases and shorter peri-
ods as capacity decreases.
High/Low Pressure Safety Controls
TheTracer ZN510/ZN524 controller
detects the state of the high pressure or
low pressure switches. When a fault is
sensed, the corresponding message is
sent to the controller to be logged into
the fault log. When the circuit returns to
normal, the high pressure control and
low pressure control automatically
reset. If a second fault is detected with-
in a thirty-minute time span, the unit
must be manually reset.
Night Setback
The four operations of theTracer
ZN510/ZN524 controller include occu-
pied, occupied standby, occupied
bypass and unoccupied.
Random Start
To prevent all of the units in a building
from energizing major loads at the
same time, the controller observes a
random start from 0 to 25 seconds.This
timer halts the controller until the ran-
dom start time expires.
Condensate Overflow
In an occupied situation, the controller
uses occupied heating and cooling set-
points to provide heating and cooling
to the building.This occupied operation
is normally used during the daytime
hours when the building is at the high-
est occupancy level.
When condensate reaches the trip
point, a condensate overflow signal
generates a diagnostic which disables
the fan, unit water valves (if present),
and compressor.The unit remains in a
halted state until the condensation
returns to a normal level.The switch in
the drain pan will then automatically
reset.The controller’s condensate over-
flow diagnostic must be manually reset
to clear the diagnostic and restart the
unit.
Reversing Valve Operation
For cooling, the reversing valve output
is energized simultaneously with the
compressor. It will remain energized
until the controller turns on the com-
pressor for heating. At this time, the
reversing valve moves to a de-ener-
In an occupied standby situation, the
controllers heating and cooling set-
points are usually wider than the occu-
pied setpoints.This operation is used
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Features and Benefits
ZN510 & ZN524 Controls
More ZN524 Controller Functions:
When the building owners choice is
TraneTracer controls, the ZN524 con-
troller is required when any of the fol-
lowing applications are selected on a
single and dual circuited equipment.
Low leaving air protection will be fur-
nished to protect the unit against deliv-
ering air that is cold enough to sweat
discharge air grilles. Coil icing protec-
tion will also be provided.
are driven open for operation, the out-
puts will be driven for 20 seconds to
ensure adequate water flow before the
compressor outputs are energized.
Once an isolation valve has been
opened, it will remain open for a 10
minute minimum to reduce excessive
Waterside economizer cooling will be
• Waterside Economizer
active during occupied, unoccupied and cycling of the valve.
standby cooling modes.
• Hot Gas Reheat (Dehumidification)
• Boilerless Control for Electric Heat
Boilerless Control Electric Heat and
Supplemental Electric Heat:The ZN524
supports a single stage of boilerless
electric heat operation or concurrent
heating.
Dehumidification
Dehumidification for the single and
dual circuited water-source heat pump
is applicable with the ZN524 controller.
The controller is capable of directing
one stage of DX cooling in conjunction
with one stage of reheat (hot gas
reheat).
• Water Isolation Valve Control
(for Variable Speed Pumping)
When the unit is configured for boiler-
less control, the EWT will be used to
determine whether DX heating should
be disabled and the electric heater
enabled. When these conditions are
met, the isolation valve(s) are driven
Entering WaterTemperature
Sampling
The ZN524 controller will sample the
entering water temperature to deter-
mine proper control action for units
Dehumidification can only occur when
the controller is in the cooling mode. A
humidity transmitter is used to meas-
ure the zone’s relative humidity (RH),
then compares the zone relative humid-
ity to the relative humidity enable/dis-
able setpoint parameters.The default
values for dehumidification enable is
60% RH with the disable point at 52%
equipped with boilerless electric heat or open for three minutes and the enter-
waterside economizer.
ing water temperature reading is taken.
The determination as to whether or not
to utilize electric heat will be made and
Waterside Economizer
Entering water temperature (EWT) sam- the controller will take appropriate
pling will automatically occur at power
up when the unit is equipped with a
waterside economizer (WSE).The EWT
is used to determine if economizing is
feasible. When the conditions are met,
the isolation valve(s) are driven open
for three minutes and the EWT reading
is taken.The determination as to
action. If boilerless electric heat is
enabled, then the isolation valve will be RH.These values are configurable.
closed, shutting down the water flow to
the unit.
When the unit is configured for concur-
rent operation of DX heating (compres-
sor in heat pump mode) and electric
heat, the electric heat will act as a sec-
ond stage of heat for single compressor
whether or not the economizer can be
enabled will be made and the controller units, and a third stage of heat for dual
will take appropriate action.The isola-
tion valve will remain open regardless
compressor units. Note: With concur-
rent (or supplemental) electric heat, the
if the WSE or the DX cooling is enabled. electric heater is field provided.
The unit’s waterside economizer will
contain a 2-position water valve wired
to the ZN524.The economizing water
coil will be optimized to provide 100%
of the unit capacity at 80.6 F/66.2 F
(27.0/10.0 C) return air temperature with
45 F (7 C) entering water.The flow rate
is established at 86 F (30 C) entering
water temperature and 96 F (36 C) leav-
ing water temperature.
Water Isolation Valves
Variable speed pumping systems are
supported by the ZN524 controller
when water isolation valves are pres-
ent. Up to two isolation valves are sup-
ported by the controller (one for each
compressor circuit).
The valves are normally closed unless
DX heating, DX cooling, waterside
economizer or dehumidification is
requested. When the isolation valves
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Features and Benefits
ZN510 & ZN524 Controls
Building Control Advantages
Integrating the ZN510/ZN524 on water-
TheTracer ZN510/ZN524 controller has
the ability to share information with
one or several units on the same com-
munication link.This sharing of infor-
mation is made possibe via a twisted
pair of wire and a building automation
system or throughTrane’s RoverTM
service tool .
source equipment, and tying it to a
Tracer Summit system provides a com-
plete building management system.
EachTracer Summit can connect to a
maximum of 120 controllers. With the
ICS system, theTracer can initiate an
alarm on a loss of performance on
equipment malfunctions; allowing
problems to be handled in a timely
manner before compromising comfort.
An advantage of installing a
ZN510/ZN524 is its capability to work
with other LonTalk certified controllers.
This provides greater flexibility to the
building owner, as well as greater flexi-
bility in design.
This type of application would most
commonly be used for a large space(s)
that may require more than one unit. In
addition to this application design, the
Tracer ZN510/ZN524 controller provides
a way for units located within the same
space to share the same zone sensor to
prevent units from simultaneously
heating and cooling in the same
space.See Figure 28 forTracer
ZN510/ZN524 controller system.
Figure 28:Tracer ZN controller system installation.
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Application
Considerations
Hanging the Horizontal
Figure 29: Horizontal unit installation
The horizontal unit GEH A is a ceiling
hung unit. It is usually applied as a
totally concealed unit above an acousti-
cal ceiling grid. Because the GEH A is
equipped with several inlet and dis-
charge arrangements, it allows for
numerous application needs.
12”/ 305mm
Slope: 1/4” (6.5 mm)
When hanging the horizontal design,
the unit should be pitched approxi-
mately 1/4-inch (6.4 mm) per foot
toward the drain in both directions.
This aids in condensate removal from
the drain pan. (See Figure 29 for unit
installation.)
Hanging Devices and Duct
Attachments
All GEHA units are shipped with a fac-
tory mounted hanging bracket and rub-
ber isolation grommet.The 3/8 -inch
(9.5 mm) all-thread and 3/8 -inch
(9.5 mm) washer and nut are field pro-
vided.
Figure 30: Unit duct collar
and hanging device
installation.
One-inch duct collars are provided for
field duct attachment to the supply-air
outlet.The duct collars, filter racks, fil-
ter and grommets are field installed.
These items are shipped in an inclo-
sure external to the unit. (See Figure 30
for unit duct collar and hanging device
installation.)
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Application
Considerations
the mechanical system.This aerosol
mist can be carried through the ducts and into
the conditioned air space.
CondensateTraps
When designing a condensate trap for the
water-source system, it’s important to consider
the unit’s draw through design.
Another problem with air backflow, is the
source of that air. Drain lines typically flow into
waste or sewage lines, giving the potential to
introduce methane and other contaminants
from the drain system into the airstream.
Under normal conditions, condensate runs
down the coil fins and drips into a condensate
pan. In situations where no trap is installed,
the water level that would be maintained in the
trap to create a seal, backflows through the
drainline into the unit. Because the fan pulls air
through the air-torefrigerant heat-exchanger,
this incoming air stream could launch water
droplets, forming at the base of the coil, into
the air.
In a properly trapped system, when conden-
sate forms during normal operation, the water
level in the trap rises until there is a constant
outflow. (See Figure 31, for the appropriate
dimensions required in designing a negative
pressure system.)
Air flowing through the coil can then spray
condensate into the fan intake, with the possi-
bility of propelling moisture into other parts of
Figure 31: Condensate trap installation.
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Application
Considerations
sized to handle the required flow with 7. For acoustically sensitive areas, a six-
Distributed Pumping System
A distributed pumping system contains
either a single or dual pump module,
specifically sized for each water-source
heat pump, then connected directly to
the units supply and return lines.
The distributed system’s supply and
return lines should be sized to handle
the required flow with a minimum pres-
sure drop.
a minimum pressure drop.
inch deep fiberglass insulation is
recommended to be field installed
below the horizontal unit.This field
supplied insulation should be
approximately twice the footprint size
of the unit. It provides sound
damping of the unit while in
operation.
Note: Pipe will sweat if low tempera-
ture water is below the dew point of the
surrounding space.Trane recommends
that these lines be insulated to prevent
damage from condensation when con-
denser loop is designed to be below
60 F/ 16 C. Equipment installed in
attic/crawl space temperatures below
40 F/ 4 C may require antifreeze in the
water loop.
1. Hose kits are used to connect the
water supply and return line to the
water inlets and outlets.Trane offers
various hose kit combinations to
better facilitate system flow balanc-
ing.These flexible hoses also aid in
the reduction of vibration between
the unit and the rigid central piping
system.
Figure 32: Distributed pumping system installation.
2.The unit’s (item 2) 3/4-inch high
3. voltage and (item 3) 1/2-inch low
voltage connections are located on
the left chamfered corner of the unit.
They are designed to accept conduit.
4.A field supplied line voltage
disconnect should be installed for
branch circuit protection. Check local
codes for requirements.
5.Trane’s self-contained pump module
and hose kit make a complete pump-
ing package for distributed pumping
systems.The module is designed for
circulating commercial loops that
require a maximum flow rate of
20 gpm (76 lpm). Each pump module
is fully assembled for connection to
water and electrical points.The kit
contains all of the necessary
components for the installation,
operation and maintenance of a
closed loop application.
See WSHPC-IN-5 (72-9006-03) for
electrical and dimensional require-
ments
6.The distributed pumping system
supply and return lines should be
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Application
Considerations
Most horizontal unit designs provide an same side return/supply-air access, a
opposite supply air from the return air brief 3-inch minimum is all that is
arrangement, or an end supply arrange- required between the unit and the wall.
ment option. See Figure 33 for end-sup-
Installation Made Easy
Installing a horizontal unit inside a cor-
ridor to enhance sound attenuation pro-
vides value to duct design.Trane takes
this fact one step further.
ply example. An end-supply design
increases the overall unit length of the
system to accommodate a 90-degree
duct turn.This not only requires added
space, but also adds cost in both mate-
rials and installation.
Service Access
To add more value in installation
requirements, the same side
The new GEH design offers same side
return-air/supply-air access to the unit.
This access is contained within the
overall dimension of the units length as
shown in Figure 32.The duct access to
the unit allows the unit to be installed
closely against a corridor wall, while at
the same time eliminating space
supply/return design eliminates the
need for a four-sided service access
(See Figure 34). When installing the
same side return/supply access, a small
3” / 76 mm minimum space is required
between the unit and wall.
Additional value to the design is
acquired through the same side sup-
ply/return-air design.This design elimi-
nates a requirement for a four sided
service access. When installing the
required for the duct design.
Figure 32: Same side supply/return air and end supply
arrangements with ductwork.
Figure 33: Service access requirments.
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