Heat Pump Systems - Honeywell VisionPRO TH8000 Series Installation Manual

Wiring
Shaded areas below apply only to TH8320/TH8321.
1H/1C Heat Pump (no auxiliary heat)
Rc Power [1]
R [R+Rc joined by jumper]
O/B Changeover valve
Y Compressor relay
G Fan relay
C 24VAC common [3]
S1 Optional outdoor/remote sensor
S2 Optional outdoor/remote sensor
2H/1C Heat Pump (with auxiliary heat)
L Equipment monitor [6, 7]
Aux/E Auxiliary/Emergency heat relay (Heat 2)
Rc Power [1]
R [R+Rc joined by jumper]
Changeover valve
O/B
Y Compressor relay
G Fan relay
C 24VAC common [3]
S1 Optional outdoor/remote sensor
S2 Optional outdoor/remote sensor
See [notes] below
[1] Power supply. Provide disconnect means and overload protection as required.
[3] Optional 24VAC common connection.
[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).
Wiring guide—heat pump systems
[5]
[5]
VisionPRO
2H/2C Heat Pump (no auxiliary heat)
Y2 Compressor 2 relay
Rc Power [1]
R [R+Rc joined by jumper]
O/B Changeover valve
Y Compressor 1 relay
G Fan relay
C 24VAC common [3]
S1 Optional outdoor/remote sensor
S2 Optional outdoor/remote sensor
3H/2C Heat Pump (with auxiliary heat)
Y2 Compressor 2 relay
L Equipment monitor [6, 7]
Aux/E Auxiliary/Emergency heat relay (Heat 2)
Power [1]
Rc
R [R+Rc joined by jumper]
O/B Changeover valve
Y Compressor 1 relay
G Fan relay
C 24VAC common [3]
S1 Optional outdoor/remote sensor
S2 Optional outdoor/remote sensor
5
TH8000 Series
TM
[5]
[5]
69-2693—01