
11
If your current
terminal has the
following letter
Write down
that letter
here
Label the wires
with the following
letters
Terminal function
W2**
W2
2nd Stage Heat (Conventional) 2nd Stage Auxiliary
Heat (Heat Pump)
Y, Y1
Y
1st Stage Compressor
Y2
Y2
2nd Stage compressor
G
G
Fan Relay
O, B*, O/B
O/B
Reversing Valve (for heat pump systems)
L
L
Heat Pump Diagnostic
Terminal labeling reference chart, contʼd.