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Trane GEHE 072-180 - Blower Motor Speed-Tap Retrofit

Trane GEHE 072-180
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Installation
60 WSHP-SVX01Q-EN
Low-voltage connection diagrams for deluxe 24V control
packages for these thermostats mounted on 6-25 ton
equipment sizes are shown in Figure 60, p. 60.
For controls using DC analog input/outputs, see
appropriate installation, operation and diagnostic
manuals for connection, CNT-SVX11*-EN (ZN524). For
installation, operation and Programming see BAS-
SVX065*-EN (UC400).
Blower Motor Speed-Tap Retrofit
Note: For GEH/V .5 to 5 ton units only.
Motors installed in the unit include 4-speed or 3-speed
configurations. All voltages include a 4-speed
configuration, with the exception of 380V, 415V, 460V
which contain a 3-speed arrangement and 575V which
contains a 2-speed arrangement.To modify the rpm of the
motor, the following steps must be followed.
1. Remove service access panel at the unit front.
2. Find the blower motor relay.The relay is located in
Figure 62, p. 60.The relay location is consistent in all
control configurations.
Removing Speed-tap Wire
3. For units w/o Hot Gas Reheat: Remove undesired
speed-tap wire from 1K4 relay at spade 3. Wire tie the
lead, to eliminate a short.
4. For units with Hot Gas Reheat: Remove undesired
speed-tap wire from 1K8 relay at spade 6. Wire tie the
lead, to eliminate a short. Hot Gas Reheat requires both
speed taps to be adjusted to enable reheat as the lower
speed tap.
Figure 60. Low-voltage connection (GEH/V 6 to 25 ton)
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
Deluxe Controls with
-all Heat Pump Units w/ Reheat
using X13511090010 (T8511)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1TB2
24 VAC (R)
FAN (G)
COMPRESSOR 1 (Y1)
COMPRESSOR 2 (Y2)
REVERSING VALVE (0) & HUMIDISTAT
24 VAC COMMON (C) & WATER ISOLATION VA
COMPRESSOR DISABLE
COMPRESSOR DISABLE
ALARM
ALARM
ELECTRIC HEAT
ELECTRIC HEAT
HUMIDISTAT
WATER ISOLATION VALVE
3RD STAGE HEAT (W3)
NOT USED
Deluxe Controls with
-all Heat Pump Units w/ Reheat
using X13511091010/X13511092010 (T7300)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1TB2
24 VAC (R)
FAN (G)
COMPRESSOR 1 (Y1)
COMPRESSOR 2 (Y2)
REVERSING VALVE (0) & HUMIDISTAT
24 VAC COMMON (X) & WATER ISOLATION VA
COMPRESSOR DISABLE
COMPRESSOR DISABLE
ALARM
ALARM
ELECTRIC HEAT
ELECTRIC HEAT
HUMIDISTAT
WATER ISOLATION VALVE
3RD STAGE HEAT (W1)
NOT USED
Deluxe Controls with
-all Heat Pump Units without Reheat
using X13511090010 (T8511)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1TB2
24 VAC (R)
FAN (G)
COMPRESSOR 1 (Y1) & WATER ISOLATION VA
COMPRESSOR 2 (Y2)
REVERSING VALVE (0) & HUMIDISTAT
24 VAC COMMON (C) & WATER ISOLATION VA
COMPRESSOR DISABLE
COMPRESSOR DISABLE
ALARM
ALARM
ELECTRIC HEAT
ELECTRIC HEAT
HUMIDISTAT
NOT USED
3RD STAGE HEAT (W3)
NOT USED
Deluxe Controls with
-all Heat Pump Units without Reheat
using X13511091010/X13511092010 (T7300)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1TB2
24 VAC (R)
FAN (G)
COMPRESSOR 1 (Y1) & WATER ISOLATION VA
COMPRESSOR 2 (Y2)
REVERSING VALVE (0) & HUMIDISTAT
24 VAC COMMON (X) & WATER ISOLATION VA
COMPRESSOR DISABLE
COMPRESSOR DISABLE
ALARM
ALARM
ELECTRIC HEAT
ELECTRIC HEAT
HUMIDISTAT
NOT USED
3RD STAGE HEAT (W1)
NOT USED
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards.To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes.
Figure 61. Service access panel
Figure 62. Relay location

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