Honeywell RTH7500D Owner's Manual page 20

Step 7. Connect Wires to New Wallplate (Cont)
8. Compare letter designations on your old and new
thermostats. Use the information below if you are
wiring a HEAT PUMP system.
2
3
3
4
AUX, W1, W or
Be sure to read the note referenced in the
numbered triangles above. These numbered
notes appear on the next page.
69-1730
Possible letter
designations on
the labeled wires
VR or V or R
H or B, O
Y1 or M or Y
F or
G
X or B, C
F or
L
X2 or X, E
W2
HEAT PUMP letter
designations on the
new thermostat
1
20
RC
R
O/B
Y
G
C
L
E
AUX
M22210