
17 69-1716
Step 7. Connect Wires to New Wallplate (Cont)
6. Compare letter designations on your old and new thermostats.Do not connect more than one wire to each terminal. Be sure to read the notes referenced in the numbered triangles above. These numbered notes appear on the next page.G
O/B W
NOT
USED
Y
R
RC
or R
New
Thermostat Possible letter designations
on the labeled wires
M22055
Do Not Connect
RC
or RH, 4, V
R
or Y1, M
Y
or W1, H, O, B
W
or F
G
or X, B
C
1
2
2
3
4
1