Fig. 26. 2H/1C heat pump with electric aux heat
Fig. 27. 2H/2C heat pump without aux heat
M37820B
2H/1C HEAT PUMP WITH
ELECTRIC AUX HEAT.
1
COMMON REQUIRED.
L ONLY CONNECTED IF HEAT PUMP HAS A FAULT TERMINAL.
SOME HEAT PUMPS USE B RATHER THAN O FOR REVERSING VALVE.
DIFFERENT HEAT PUMP MODELS LABEL THE AUXILIARY HEAT TERMINAL
DIFFERENTLY THAN SHOWN. CONSULT HEAT PUMP WIRING GUIDE.
LOCKOUT OF AUX HEAT ON HIGH OUTDOOR TEMPERATURE CAN BE
DONE THROUGH ROUTER/INTERNET CONNECTION AND APP, WIRED
OUTDOOR SENSOR OR WIRELESS OUTDOOR SENSOR.
MOST HEAT PUMPS SHARE THE SAME SET OF HEAT STRIPS FOR AUX AND
EM HEAT. IN THOSE CASES E ISN’T USED. IF SEPARATE AUX AND E WIRES
ARE USED, WIRE ONE SET OF STRIPS TO E TO BE ENERGIZED IN EM HEAT
AND A DIFFERENT SET OF STRIPS TO AUX TO BE ENERGIZED IN AUX HEAT.
DO NOT CONNECT ANY WIRE TO W FOR HEAT PUMP APPLICATIONS!
THIS CAN CAUSE HEAT TO RUN CONTINUOUSLY.
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
HEAT PUMP/
AIR-HANDLER
R/Rc
SWITCH UP
O/B
1
RAUX
L
G
C
O
Y
2
3
4
5
6
7
2
3
4
6
7
5
M37563A
2H/2C HEAT PUMP
WITHOUT AUX HEAT.
1
COMMON REQUIRED.
L ONLY CONNECTED IF HEAT PUMP HAS A FAULT TERMINIAL.
SOME HEAT PUMPS USE B RATHER THAN O FOR REVERSING VALVE.
DO NOT CONNECT ANY WIRE TO W FOR HEAT PUMP APPLICATIONS!
THIS CAN CAUSE HEAT TO RUN CONTINUOUSLY.
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
HEAT PUMP/
AIR-HANDLER
R/Rc
SWITCH UP
O/B
1
1
R
O
Y
G
C
L
2
3
4
1
2
1
3
4
Y2
To Next Page
Loading...
Need help?
General
