Wiring Guide—Heat Pump Systems - Honeywell TH8320ZW Installation Manual

Wiring
1H/1C Heat Pump (no auxiliary heat)
Rc
Power [1]
R
[R+Rc joined by jumper]
O/B Changeover valve [5]
Y
Compressor relay
G
Fan relay
C 24VAC common [3]
K
Optional THP9045 Wiring Module
Terminal [9]
2H/1C Heat Pump (with auxiliary heat)
L Equipment monitor [6, 7]
E
Emergency heat relay [8]
Aux
Auxiliary heat relay (Heat 2) [8]
Rc Power [1]
R
[R+Rc joined by jumper]
O/B
Changeover valve [5]
Y Compressor relay
G
Fan relay
C
24VAC common [3]
K Optional THP9045 Wiring Module
Terminal [9]
2H/2C Heat Pump (no auxiliary heat)
Y2
Compressor 2 relay
Rc Power [1]
R
[R+Rc joined by jumper]
O/B Changeover valve [5]
Y Compressor 1 relay
G
Fan relay
C 24VAC common [3]
K Optional THP9045 Wiring Module
Terminal [9]
See [notes] below
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Remove jumper for 2 transformer systems.
[3] Connection to 24VAC common at the transformer is required.
[4] Common connection must come from cooling transformer.
[5] O/B set to control as either O or B in installer setup.
[6] If L terminal is used, 24VAC common (terminal C) must be connected.
[7] Heat pump reset (powered continuously when thermostat is set to Em. Heat; system monitor
when set to Heat, Cool, or Off).
[8] Install field jumper between Aux and E terminals if there is no emergency heat relay.
[9] See "Optional THP9045 Wiring Module" on page 14 for more details.
Wiring guide—heat pump systems
1H/1C System (2 transformers)
Rc
Power (cooling transformer) [1, 2]
R
Power (heating transformer) [1, 2]
W Heat relay
Y
Compressor contactor
G
Fan relay
C 24VAC common [3, 4]
K
Optional THP9045 Wiring Module
Terminal [9]
Heat Only System With Fan
Rc Power [1]
R
[R+Rc joined by jumper]
W
Heat relay
G Fan relay
C
24VAC common [3]
Cool Only System
Rc
Power [1]
R [R+Rc joined by jumper]
Y
Compressor contactor
G
Fan relay
C 24VAC common [3]
K
Optional THP9045 Wiring Module
Terminal [9]
2H/2C System (2 transformers)
Y2 Cool relay 2
W2
Heat relay 2
Rc
Power (cooling transformer) [1, 2]
R Power (heating transformer) [1, 2]
W
Heat relay 1
Y
Cool relay 1
G Fan relay
C
24VAC common [3, 4]
K
Optional THP9045 Wiring Module
Terminal [9]
5
TH8320ZW
69-2486—07