Honeywell Heat/1Cool User Guide - Page 14

Equipment Function, Equipment, Terminals, PC8900 - heat cool

Page 14 highlights

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

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