3 33-00235
C
Common wire from secondary side of cooling transformer (in case of two transformers)
K
Optional wire save module.
Rc
Cooling power. Connect to secondary side of cooling system transformer.
R
Heating power. Connect to secondary side of heating system transformer.
W-O/B
1st stage heat relay. Or changeover valve for heat pumps.
Y
1st stage compressor contactor.
G
Fan relay.
W2-Aux/E
2nd stage heat relay. Or heat pump auxiliary/Emergency heat relay.
Y2
2nd stage compressor contactor.
L
Heat pump system monitor.
Jumper Loop - a plug with a wire loop used to connect the
R
to the
RC
terminals, Leave jumper loop
in place in single transformer systems. Remove (unplug) jumper loop in the two transformer systems.
Terminal Designations
Wiring
Remove
jumper loop
ONLY if you
have both
R
and RC
wires.
Terminal
release
Terminal
holes accept
one wire
