6
Replace the old labels with the enclosed new labels:
Replacing Wiring Labels
Old
New
Type
F, G
G
Fan control relay
B
B
Heat active reversing valve
Y, Y6
Y
Cooling control
H, W, 4
W
Heating control
C
C
Transformer, common side
M, 4, RH, RS, R
R
Transformer, hot side
