Controls Using 24 Vac - Trane Axiom GEH Series Installation, Operation And Maintenance Manual

Installation

Controls Using 24 Vac

Before installing any wire, refer to the electrical access
locations in the Unit Dimensions and Weights sections of
this manual.
Ensure that the AC control wiring between the controls and
the unit termination point does not exceed 3 Ohms/
conductor for the length of the run.
NOTICE
Component Failure!
Resistance in excess of 3 ohms per conductor could
result in component failure due to insufficient AC
voltage supply.
Do not exceed three (3) ohms per conductor for the
length of the run.
Check all loads and conductors for grounds, shorts, and
mis-wiring. Use copper conductors unless otherwise
specified. Do not run the AC low-voltage wiring in the same
conduit with the high voltage power wiring.
Table 43. 24V AC conductors
Distance from unit to control
000-460 ft
461-732 ft
733-1000 ft
Low-voltage connection diagrams for deluxe 24 V control
packages for these thermostats mounted on 6 to 25 ton
equipment sizes are shown in the figures below.
Figure 53. Low-voltage connection (GEH/V 6 to 25
ton)
Deluxe Controls with
-all Heat Pump Units w/ Reheat
using X13511090010 (T8511)
1TB2
1 24 VAC (R)
2 FAN (G)
3 COMPRESSOR 1 (Y1)
COMPRESSOR 2 (Y2)
4
REVERSING VALVE (0) & HUMIDISTAT
5
6 24 VAC COMMON (C) & WATER ISOLATION VA
7 COMPRESSOR DISABLE
8 COMPRESSOR DISABLE
9 ALARM
ALARM
10
ELECTRIC HEAT
11
ELECTRIC HEAT
12
13 HUMIDISTAT
14 WATER ISOLATION VALVE
15 3RD STAGE HEAT (W3)
16 NOT USED
Deluxe Controls with
-all Heat Pump Units without Reheat
using X13511090010 (T8511)
1TB2
24 VAC (R)
1
2 FAN (G)
3 COMPRESSOR 1 (Y1) & WATER ISOLATION VA
4 COMPRESSOR 2 (Y2)
REVERSING VALVE (0) & HUMIDISTAT
5
24 VAC COMMON (C) & WATER ISOLATION VA
6
COMPRESSOR DISABLE
7
8 COMPRESSOR DISABLE
9 ALARM
10 ALARM
11 ELECTRIC HEAT
ELECTRIC HEAT
12
HUMIDISTAT
13
14 NOT USED
15 3RD STAGE HEAT (W3)
16 NOT USED
56
Recommended wire size
18 gauge
16 gauge
14 gauge
Deluxe Controls with
-all Heat Pump Units w/ Reheat
using X13511091010/X13511092010 (T7300)
1TB2
1 24 VAC (R)
2 FAN (G)
3 COMPRESSOR 1 (Y1)
COMPRESSOR 2 (Y2)
4
REVERSING VALVE (0) & HUMIDISTAT
5
6 24 VAC COMMON (X) & WATER ISOLATION VA
7 COMPRESSOR DISABLE
8 COMPRESSOR DISABLE
9 ALARM
ALARM
10
ELECTRIC HEAT
11
ELECTRIC HEAT
12
13 HUMIDISTAT
14 WATER ISOLATION VALVE
15 3RD STAGE HEAT (W1)
16 NOT USED
Deluxe Controls with
-all Heat Pump Units without Reheat
using X13511091010/X13511092010 (T7300)
1TB2
24 VAC (R)
1
2 FAN (G)
3 COMPRESSOR 1 (Y1) & WATER ISOLATION VA
4 COMPRESSOR 2 (Y2)
REVERSING VALVE (0) & HUMIDISTAT
5
24 VAC COMMON (X) & WATER ISOLATION VA
6
COMPRESSOR DISABLE
7
8 COMPRESSOR DISABLE
9 ALARM
10 ALARM
11 ELECTRIC HEAT
ELECTRIC HEAT
12
HUMIDISTAT
13
14 NOT USED
15 3RD STAGE HEAT (W1)
16 NOT USED
Figure 54. Low voltage wire connection (GEH/V 0.5 to
5 ton)
Figure 55. Low voltage single wire connection (GEH/
V 0.5 to 5 ton)
Make connection for a single-wire by inserting a single wire
after stripping off the coating.
WSHP-SVX01AC-EN