Wiring - Honeywell PRO TH3110D Installation Manual

Installation Guide

Wiring

Wiring guide — conventional and heat pump systems
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
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 sys-
tems.
[3] Optional 24 Vac common connection.
[4] Common connection must come from
cooling transformer.
[5] Use either O or B terminals for changeover
valve.
69-1929EFS—01
Aux Y G O L R B
M29393
W Y G O Rc R B
MCR29394
W Y G O Rc R B
MCR29395
See [notes] below
1H/1C Heat
Pump System
C
TH3110D [7]
C 24 Vac common [3]
B Changeover valve energized in
heating [5]
R [R+Rc joined by jumper]
Rc Power
O Changeover valve energized in
cooling
G Fan relay
Y Compressor contactor
W [W+Y joined by jumper]
Heat Only
System
TH3110D
C
C 24 Vac common
R [R+Rc joined by jumper]
Rc Power
W Heat relay
Heat Only
System with
Fan TH3110D
C 24 Vac common [3]
C
R [R+Rc joined by jumper]
Power
Rc
G Fan relay
W Heat relay
Cool Only
System
TH3110D
C 24 Vac common [3]
R [R+Rc joined by jumper]
Rc Power
G Fan relay
Y Compressor contactor
[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.
4
W Y G O Rc
[1]
[5]
[6]
W Rc
O
[3]
[1]
W G O Rc
[1]
Y G O Rc
[1]
R B C
MCR29396
R C
B
MCR29397
R B C
MCR29398
R B C
MCR29399