Trane Axiom GEHB 006 - Installation - 24 VAC Controls; 24 VAC Control Wiring

56 WSHP-SVX01E-EN
Installation
Controls Using 24 VAC
Before installing any wire, refer to the
electrical access locations in
Dimension section of this manual.
Ensure that the AC control wiring
between the controls and the unit’s
termination point does not exceed
three (3) ohms/conductor for the
length of the run.
Note: Resistance in excess of 3-
ohms per conductor may
cause component failure due
to insufficient AC voltage
supply.
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.
Low voltage connection diagrams for
basic and deluxe 24 volt control
packages mounted on 1/2 through 5
ton equipment sizes are shown in
Figure 62.
Table 33. 24V AC conductors
Distance from unit
to Control
Recommended
Wire Size
000-460 feet 18 gauge
461-732 feet 16 gauge
733-1000 feet 14 gauge
Figure 62. Low voltage connection (1/2 through 5 ton equipment)
Basic Controls Wall Mounted Thermostat
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1TB1
24 VAC
FAN
REVERSING VALVE (COOL)
COMPRESSOR & VAR SPD PUMP SOLENOID
24 VAC GENERAL ALARM OUTPUT
24 VAC COMMON & VAR SPD PUMP SOLENOID
Deluxe Controls Wall Mounted Thermostat
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1TB1
24 VAC
FAN
REVERSING VALVE (COOL)
COMPRESSOR & VAR SPD PUMP SOLENOID
24 VAC COMMON & VAR SPD PUMP SOLENOID
ELECTRIC HEAT (COOL ONLY W/ ELEC HT UNIT)
24 VAC COMPRESSOR DISABLE INPUT
24 VAC COMPRESSOR DISABLE INPUT
ALARM CONTACT OUTPUT
ALARM CONTACT OUTPUT
Deluxe Controls NSB Thermostat
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1TB1
"L" THERMOSTSAT TERMINAL
FAN
REVERSING VALVE (COOL)
COMPRESSOR & VAR SPD PUMP SOLENOID
24 VAC COMMON & VAR SPD PUMP SOLENOID
"R" THERMOSTAT TERMINAL
24 VAC COMPRESSOR DISABLE INPUT
24 VAC COMPRESSOR DISABLE INPUT
24 VAC NI GHT SETBACK INPUT
24 VAC NI GHT SETBACK INPUT
ALARM CONTACT OUTPUT
ALARM CONTACT OUTPUT
Deluxe Controls With Reheat
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1TB1
24 VAC
FAN
REVERSING VALVE (COOL)
COMPRESSOR
24 VAC COMMON & VAR SPD PUMP SOLENOID
24 VAC COMPRESSOR DISABLE INPUT
24 VAC COMPRESSOR DISABLE INPUT
HUMIDISTAT
VAR SPD PUMP SOLENOID
ALARM CONTACT OUTPUT
ALARM CONTACT OUTPUT