Honeywell International Inc. TH8320EM01 Manuale Utente
Installation Guide
69-2537EFS—01 4
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]
S1/S2 Optional outdoor sensor
2H/1C Heat Pump (with auxiliary heat)
L
Equipment monitor
[6, 7]
Aux/E 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]
S1/S2 Optional outdoor sensor
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]
S1/S2 Optional outdoor sensor
3H/2C Heat Pump (with auxiliary heat)
Y2
Compressor 2 relay
L
Equipment Monitor
[6, 7]
Aux/E Auxillary heat relay (Heat 2)
[8]
Rc
Power
R
[R+Rc joined by jumper]
O/B Changeover value
[5]
Y
Compressor 1 relay
G
Fan relay
C
24VAC common
[3]
K
Optional THP9045 Wiring Module Terminal
[9]
S1/S2 Optional outdoor sensor
Wiring
See [
notes
] below
[1]
Power supply. Provide disconnect means and overload protection as required.
[3]
Connection to 24VAC common at the transformer is required.
[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 mode; system monitor when
set to Heat, Cool, or OFF).
[9]
See page 14 for more details.
Terminal Designations
Conventional Terminal Letters:
R
Heating power. Connect to secondary side
of heating system transformer.
Rc
Cooling power. Connect to secondary side
of cooling system transformer.
C
Common wire from secondary side of
cooling transformer (if 2 transformers).
W
1st stage heat relay.
W2
2nd stage heat relay.
Y
1st stage compressor contactor.
Y2
2nd stage compressor contactor.
G
Fan relay.
K
Optional THP9045 Wiring Module Terminal
[9]
S1/S2 Optional outdoor sensor
Heat Pump Terminal Letters:
R
Heating power. Connect to secondary side
of heating system transformer.
Rc
Cooling power. Connect to secondary side
of cooling system transformer.
C
Common wire from secondary side of
cooling system transformer.
Y
1st stage compressor contactor.
Y2
2nd stage compressor contactor.
Aux/E Auxiliary heat relay.
G
Fan relay.
L
Heat pump reset (powered continuously
when System is set to Em Heat; system
monitor when set to Heat, Cool or Off).
O/B Changeover valve for heat pumps.
K
Optional THP9045 Wiring Module Terminal
[9]
S1/S2 Optional outdoor sensor
Wiring guide—heat pump systems