Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 14

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE
70-6627 • 12
Equipment
Equipment Function
Terminals
Transformer Common
Power
Fan
1st Stage Heating
1st Stage Cooling
Changeover Valve
2nd Stage Heating
Emergency Heat
2nd Stage Cooling
Fig. 12. Relay wiring connections for PC8900 in heat pump applications
requiring separate Y and W
1
Equipment Function
Transformer Common
Power
Fan
1st Stage Cooling
1st Stage Heating
Changeover Valve
2nd Stage Heating
Emergency Heat
2nd Stage Cooling
Fig. 13. Relay wiring connections for PC8900 in heat pump applications
requiring separate Y and W
1
PC8900
Terminals
C
R
G
W1
Y1
B
W2
E
Y2
terminals with a heating changeover.
1
Equipment
Terminals
C
R
G
Y1
W1
O
W2
E
Y2
terminals with a cooling changeover.
1
C
R
G
O/B
Y1/W1
Aux.
E
Y2
M13233
PC8900
Terminals
C
R
G
O/B
Y1/W1
Aux.
E
Y2
M13234