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Fig. 2—Mounting wallplate on wall.
WALL
ANCHORS
(2)
WIRES THROUGH
WALL OPENING
WALLPLATE
1
USE TWO MOUNTING HOLES THAT
BEST FIT APPLICATION.
WIRING
All wiring must comply with local electrical codes and
ordinances.
Disconnect power before wiring to prevent electrical
shock or equipment damage.
The shape of the terminal barrier permits insertion of
straight or conventional wraparound wiring connections.
Either method is acceptable.
Refer to Table 1 and Fig. 4 through 8 for wiring guide-
lines.
NOTE: Keep all wiring restricted to ribbed area surrounding
terminals (Fig. 3) to assure thermostat/wallplate contact.
TABLE 1—TERMINAL CROSS REFERENCE.
Old Thermostat
Terminal Marked
Function
G or F
Fan
Y or C
Cooling
W or H
Heating
RC, V, VC or R
Power
RH, M, VR, 4
Power
Fig. 3—Keep wiring restricted to ribbed area
surrounding terminals.
FOR STRAIGHT
INSERTION –
STRIP 5/16 in. [8 mm]
FRONT VIEW OF
TERMINAL AREA
WIRING TO BE BELOW
THIS SURFACE
CROSS-SECTIONAL VIEW OF
TERMINAL AREA
69-0446—2
WALL
MOUNTING
HOLES (3)
1
MOUNTING
SCREWS (2)
M2917
New Thermostat
Terminal Marked
G
Y
W
RC
R
FOR WRAPAROUND –
STRIP 7/16 in. [11 mm]
RESTRICT
WIRING TO
THIS AREA
TOP SURFACE
OF SUBBASE
M2927
2
Fig. 4—CT8602C heating-only circuit in a
continuous pilot gas system.
WALLPLATE
W
G
FAN RELAY
GAS
VALVE
1
L2
24V
L1
(HOT)
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 5—CT8602C heating-only circuit in an oil
system.
WALLPLATE
W
G
L1
(HOT)
1
T
T
L2
OIL PRIMARY
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 6—CT8602C heating/cooling circuit in a
single transformer system with gas heat and
electric cooling or electric heat and electric
cooling, RC and R terminals.
WALLPLATE
W
G
FAN RELAY
2
HEATING
PRIMARY
CONTROL
1
L1
(HOT)
24V
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS
1
AND OVERLOAD PROTECTION AS REQUIRED.
PRIMARY CONTROL SUCH AS GAS VALVE OR
2
ELECTRONIC IGNITION MODULE.
FACTORY-
INSTALLED
JUMPER
R
RC
Y
M121A
FACTORY-
INSTALLED
JUMPER
R
RC
Y
M122
FACTORY-
INSTALLED
JUMPER
R
RC
Y
COOLING
CONTACTOR
M119
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