Honeywell RTH8500D Owner's Manual - Page 17
Pump System.
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Step 7. Connect Wires to New Wallplate (Cont) 7. Compare letter designations on your old and new thermostats. Use the information below if you are wiring a CONVENTIONAL System. Use the information on page 20 if you are wiring a Heat Pump System. CONVENTIONAL Possible letter letter designations designations on on the new thermostat the labeled wires 1 RC 1 R RC or R R or RH, 4, V W or W1, H W Y or Y1, M Y G or F G C or C1, X, B C Y2 Y2 W2 W2 2 2 34 M22208 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. 17 69-1725-1
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17
69-1725-1
Step 7. Connect Wires to New Wallplate (Cont)
7.
Compare letter designations on your old and new thermostats.
Use the information below if you are wiring a
CONVENTIONAL
System. Use the information on page 20 if you are wiring a Heat
Pump System.
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.
C
G
W
R
RC
or R
CONVENTIONAL
letter designations
on the new thermostat
Possible letter
designations on
the labeled wires
M22208
RC
or RH, 4, V
R
or W1, H
W
or C1, X, B
C
W2
1
2
2
3
1
Y
W2
Y2
or Y1, M
Y
or F
G
Y2
4