Carrier COMFORT SERIES 25HCR Installation Instructions Manual page 8

HP THERMOSTAT
24 VAC HOT
24 VAC COM
HEAT STAGE 2
COOL/HEAT
STAGE 1
INDOOR FAN
RVS COOLING
EMERGENCY
HEAT
Fig. 9 --- Generic Wiring Diagrams
(See Thermostat Installation Instructions for specific unit combinations)
Speedup Quiet
Pins Shift
Fig. 10 --- Defrost Control
TYPICAL
FAN COIL
R
R
C C
*
W2
W2
*
E
Y
*
W3
G
G
O
E
*
IF AVAILABLE
LEGEND
24-V FACTORY WIRING
24-V FIELD WIRING
FIELD SPLICE CONNECTION
ODT
OUTDOOR THERMOSTAT
EMERGENCY HEAT RELAY
EHR
SHR SUPPLEMENTAL HEAT RELAY
HK32EA003
Defrost interval
DIP switches
8
HEAT
PUMP
R
C
W2
Y
O
A02325 / A97413
A05378