Honeywell Home T10 Product Data page 17

S A
L/A
5
S O/B
Y
AUX
W2
Y2 E
6
G
W
7
C K
R
U
Rc
U
R/Rc
SWITCH UP
4
1 2 3
C
G Y L O AUX R
1 COMMON REQUIRED.
2 L ONLY CONNECTED IF HEAT PUMP HAS A FAULT TERMINAL.
3 SOME HEAT PUMPS USE B RATHER THAN O FOR REVERSING VALVE.
4 DIFFERENT HEAT PUMP MODELS LABEL THE AUXILIARY HEAT TERMINAL
DIFFERENTLY THAN SHOWN. CONSULT HEAT PUMP WIRING GUIDE.
5 LOCKOUT OF AUX HEAT ON HIGH OUTDOOR TEMPERATURE CAN BE
DONE THROUGH ROUTER/INTERNET CONNECTION AND APP, WIRED
OUTDOOR SENSOR OR WIRELESS OUTDOOR SENSOR.
6 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.
7 DO NOT CONNECT ANY WIRE TO W FOR HEAT PUMP APPLICATIONS!
THIS CAN CAUSE HEAT TO RUN CONTINUOUSLY.
Fig. 26. 2H/1C heat pump with electric aux heat
2H/1C HEAT PUMP WITH
ELECTRIC AUX HEAT.
HEAT PUMP/
AIR-HANDLER
M37820B
S
S
Y
Y2
G
C
U
U
1 1
1 2
C G Y2 Y
1 COMMON REQUIRED.
2 L ONLY CONNECTED IF HEAT PUMP HAS A FAULT TERMINIAL.
3 SOME HEAT PUMPS USE B RATHER THAN O FOR REVERSING VALVE.
DO NOT CONNECT ANY WIRE TO W FOR HEAT PUMP APPLICATIONS!
4
THIS CAN CAUSE HEAT TO RUN CONTINUOUSLY.
Fig. 27. 2H/2C heat pump without aux heat
13
2H/2C HEAT PUMP
WITHOUT AUX HEAT.
A
L/A
O/B
AUX
W2
E
W
4
K
R
Rc
R/Rc
SWITCH UP
1 3
HEAT PUMP/
L O R AIR-HANDLER
M37563A
33-00462—05