Wiring; Terminal Designations; Conventional Terminal Letters; Heat Pump Terminal Letters - Honeywell TH8320WF VisionPRO System Setup

Wiring

Terminal Designations

Conventional Terminal Letters:

Y2
2nd stage compressor contactor.
W2 2nd stage heat relay.
K Optional wirer save module.
S1 Optional outdoor or remote sensor.
S2
Optional outdoor or remote sensor.
Rc
Cooling power. Connect to secondary side
of cooling system transformer.
R
Heating power. Connect to secondary side
of heating system transformer.
W
1st stage heat relay.
Y
1st stage compressor contactor.
G Fan relay.
C Common wire from secondary side of
cooling transformer (if 2 transformers).
Y2 Y2
L
E/AUX W2
K
K
S1 S1
S2 S2
HEAT PUMP
CONVENTIONAL
RC

Heat Pump Terminal Letters:

Y2
2nd stage compressor contactor.
L
Heat pump reset (powered continuously
when System is set to Em Heat; system
monitor when set to Heat, Cool or Off).
E/Aux Auxiliary/Emergency heat relay.
K Optional wirer save module.
S1 Optional outdoor or remote sensor.
S2
Optional outdoor or remote sensor.
Rc
Cooling power. Connect to secondary side
of cooling system transformer.
R
Heating power. Connect to secondary side
of heating system transformer.
O/B Changeover valve for heat pumps.
Y
1st stage compressor contactor.
G Fan relay.
C Common wire from secondary side of
cooling system transformer.
3
RC
R R
W O/B
Y Y
G G
C C
MCR34051A
69-2733EFS—05