PG
16
PG
17
PG
17
Wire Reference Chart
Possible Wires
What they control
R or V or VR
RH
and
RC
Single power for HEAT and COOL
RH or 4
RH
Power for HEAT (RH not connected to RC jumper clip removed)
RC
RC
Power for COOL (RH not connected to RC jumper clip removed)
W
W
Heat control
W2
W2
2nd stage HEAT or heat pump auxiliary heat
W3
W3
3rd stage HEAT or 2nd stage of 2 stage auxiliary heat
Y
Y
COOL control or 1st stage compression for heat pump.
Y2
Y2
2nd stage COOL control or 2nd stage compression for a heat pump
G or F
G
FAN control
C or X
C
24VAC power (to power thermostat )
NOTE: TRANE uses B for this connection
H
H
External Humidifier
DH
DH
External De-Humidifier
EX
EX
external fresh air baffle
B
B
Heat pump changeover (cool to heat, powered in heat)
O
O
Heat pump changeover (heat to cool, powered in cool)
B and O
IMPORTANT: If there are both B and O wires (Trane pump
products) DO NOT CONNECT B to B terminal, connect B to C
terminal. If not a Trane product tape off B.
E
n/a Emergency heat (do not connect, tape off)
L
n/a System monitor (do not connect, tape off)
T
n/a Outdoor sensor (do not connect, tape off)
Summary of Contents for CT30
Page 19: ...PG 19 Notes on your system...