69-2733EFS—01 2
Y2
W2
K
S1
S2
RC
R
W
Y
G
C
RC
R
O/B
Y
G
C
R
W
G
C
Y
HEAT PUMP
CONVENTIONAL
Y2
L
E/AUX
K
S1
S2
MCR34051
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).
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.
Terminal Designations
Wiring
To Next Page
Loading...
