3
1H/1C Heat Pump System TH3110D
[7]
C
24 Vac common
[3]
B
Changeover valve energized in
heating
[5]
R
[R+Rc joined by jumper]
Rc
Power
[1]
O
Changeover valve energized in
cooling
[5]
G
Fan relay
Y
Compressor contactor
[6]
W
[W+Y joined by jumper]
Heat Only System TH3110D
C
24 Vac common
[3]
R
[R+Rc joined by jumper]
Rc
Power
[1]
W
Heat relay
Heat Only System with Fan TH3110D
C
24 Vac common
[3]
R
[R+Rc joined by jumper]
Rc
Power
[1]
G
Fan relay
W
Heat relay
Cool Only System TH3110D
C
24 Vac common
[3]
R
[R+Rc joined by jumper]
Rc
Power
[1]
G
Fan relay
Y
Compressor contactor
2H/1C Heat Pump System TH3210D
C
24 Vac common
[3]
B
Changeover valve energized in
heating
[5]
R
Power
[1]
L
Sends output when set to Em. Heat
[8]
O
Changeover valve energized in
cooling
[5]
G
Fan relay
Y
Compressor contactor
Aux
Auxiliary heat relay
[9]
E
Emergency heat relay
[9]
1H/1C System TH3110D
(1 transformer)
C
24 Vac common
[3]
R
[R+Rc joined by jumper]
Rc
Power
[1]
G
Fan relay
Y
Compressor contactor
W
Heat relay
1H/1C System TH3110D
(2 transformers)
C
24 Vac common
[3, 4]
R
Power (heating transformer)
[1, 2]
Rc
Power (cooling transformer)
[1, 2]
G
Fan relay
Y
Compressor contactor
W
Heat relay
Wiring conventional and heat pump systems
NOTES
Wire specifications:
Use 18- to 22-gauge thermostat wire.
Shielded cable is not required.
[1]
Power supply. Provide disconnect means
and overload protection as required.
[2]
Remove jumper for 2-transformer systems.
[3]
Optional 24 Vac common connection.
[4]
Common connection must come from cool-
ing transformer.
[5]
Use either O or B terminals for changeover
valve.
[6]
Use a small piece of wire (not supplied) to
connect W and Y terminals.
[7
] Set fan operation switch to Heat Pump (see
page 5) and configure system type for heat
pump (see page 6).
[8]
L terminal sends a continuous output when
thermostat is set to Em. Heat. Connect
to Honeywell zoning panels to switch the
panel to Emergency Heat.
[9]
Install field jumper between Aux and E if
there is no emergency heat relay.
C
R
O
G
Y
E
B
Aux
L
C
R
O
G
Y
W
B
Rc
C
R
O
G
Y
W
B
Rc
C
R
O
G
Y
W
B
Rc
C
R
O
W
B
Rc
C
R
O
G
W
B
Rc
C
R
O
G
Y
B
Rc
