Table des Matières
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Wiring
Terminal
release
Remove
jumper loop
ONLY if you
have both
R and Rc
wires.
Terminal Designations
C
Common wire from secondary side of cooling transformer (if 2 transformers).
K
Optional C-wire adaptor.
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 two transformer systems.
3
Terminal
holes
accept one
wire
MCR34820
69-2815EFS—07
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Table des Matières
