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Outlet Box Mounting (Fig. 4)
Use a horizontally mounted outlet box if possible. If a
vertical outlet box is used, the subbase must be mounted on
a 202689A Cover Plate Assembly (ordered separately).
Follow the instructions provided with the cover plate as-
sembly.
Align the subbase mounting holes on the outlet box and
loosely fasten with the two screws.
Carefully level the subbase (Fig. 3) and firmly tighten
the screws.
Fig. 4—Mounting subbase on outlet box.
EXISTING
HORIZONTAL
OUTLET BOX
R
G
FAN
ON
AUTO
WIRE SUBBASE
Follow the instructions provided by the heating, cool-
ing, or heating/cooling equipment manufacturer. If not
available, refer to the Typical Wiring Diagrams section at
the end of this publication.
Disconnect the power supply before making wiring con-
nections to prevent electrical shock or equipment damage.
NOTE: All wiring must comply with local electrical codes
and ordinances.
Refer to Fig. 5 and strip thermostat wire insulation as
necessary.
Fig. 5—Methods of connecting terminals.
FOR STRAIGHT
CONNECTION—
STRIP 5/16 in. [8 mm]
FOR WRAPAROUND
CONNECTION—
STRIP 7/16 in. [11 mm]
O
B
W
HEATING/
COOLING
SUBBASE
Y
COOL
HEAT
OFF
M1553A
BARRIER
M1556B
Fig. 3—Leveling methods for subbase.
PLUMB
LINE
PLUMB
BOB OR
WEIGHT
VERTICAL
OUTLET
BOX
1
NOT INCLUDED WITH UNIT.
2
ACCESSORY PARTS AVAILABLE.
Connect the wires to corresponding terminals on the
subbase.
If labels do not agree with your new subbase, refer to
Table 2 or Fig. 11.
TABLE 2—TERMINAL DESIGNATIONS.
Subbase
Terminal
R
Control transformer power.
W
Heating control circuit.
Y
Cooling control circuit (jumper to W for
heat pump compressor control).
G
Fan control circuit.
O
Cooling damper or changeover/reversing
valve, makes continuously in cool.
B
Heating damper or changeover/reversing
valve, makes continuously in heat.
Push excess wire back into the wall.
Plug the hole in the wall with nonhardening caulk, putty,
or nonflammable insulation to prevent drafts from affect-
ing thermostat operation.
3
SPIRIT LEVEL
O
B
R
W
G
Y
FAN
ON
AUTO
HEAT
1
2
COVER
ADAPTER
PLATE
RING
2
R
G
SUBBASE OR
WALLPLATE
MOUNTING
SCREWS (2)
Control Function
69-0637—2
COOL
OFF
M1555
O
B
W
Y
M1554A
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