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6
Review the wiring chart information.
a.
Refer to:
• Chart 1 - If you do NOT have a heat pump
• Chart 2 - If you have a heat pump
b.
Select the correct row based upon the thermostat being replaced, and then circle the wire labels you have.
c.
Connect your wires as shown in the New Thermostat Terminals row.
Chart 1: Gas or Electric
(Single Stage or Multistage)
Themostat Being Replaced
All Brands
Connects to
New Thermostat Terminals
Chart 2: Heat Pump
(Single Stage or Multistage)
Themostat Being Replaced
Trane/American Standard
(Weathertron) or York
Other Brands
Lennox
Connects to
New Thermostat Terminals
* Connect two wires to the W1 terminal
** If your existing thermostat has a "V" or "VR" wire label, connect that wire to "24RC" on the new thermostat, then connect the wire labeled
"R" to "W2/O/B" on the new thermostat
4
C
R
X
RC
B
24COM
24RC
24RH
COM
R
RH
C
RC
B
COM
R
RH
C
RC
X
C
R
RH
X
RC
**VR
**V
24COM
24RC
24RH
Wire Labels
RH
W
W2
W1
W1
W2/O/B
Wire Labels
E
W
X2
W1
W2
Y
AUX
E
W
X2
W1
W2
Y
AUX
E
W
X2
W1
W2
Y
AUX
*W1
W2/O/B
Some wire terminals
may not be used
G
Y
F
Y1
G
Y1
Some wire terminals
may not be used
O
G
Y
Y1
O
G
Y
B
F
Y1
O
G
Y
**R
F
Y1
G
Y1
Y2
Y2
Y2
Y2
Y2
Y2
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