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3 69-0638—1
Fig. 3—Leveling methods for wallplate or
subbase.
WIRE WALLPLATE OR SUBBASE
Follow the instructions provided by the heating, cooling,
or heating/cooling equipment manufacturer. If not avail-
able, 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.
This thermostat clock can be powered by a 24-Vac trans-
former with battery backup. Refer to Figs. 15 and 16 for
hookup diagrams of typical powering applications.
Wallplate (Heating or Cooling Systems)
Refer to Fig. 5 and strip the thermostat wire insulation as
necessary.
For heating-only systems, connect wires to R, W, and C
(if applicable) terminals. See Fig. 17. For cooling-only sys-
tems, connect wires R, Y, and C (if applicable) terminals.
Firmly tighten the screws.
Push excess wire back into the wall.
Plug the hole in the wall with nonhardening caulk, putty,
or nonflammable insulation to prevent drafts from affecting
thermostat operation.
Subbase (Heating/Cooling Systems)
Refer to Fig. 5 and strip the thermostat wire insulation as
necessary.
AUTO OFF
COOL
HEATON
FAN
B
O
W
Y
R
G
M1555
SPIRIT LEVEL
PLUMB
LINE
PLUMB
BOB OR
WEIGHT
Outlet Box Mounting (Fig. 4)
Use a horizontally mounted outlet box if possible. If a
vertical outlet box is used, mount the wallplate or subbase on
a 193121A Cover Plate Assembly (ordered separately). Fol-
low the instructions provided with the cover plate assembly.
Align the wallplate or subbase mounting holes on the
outlet box and loosely fasten with two screws.
Carefully level the wallplate or subbase (Fig. 3), and
firmly tighten the screws.
Fig. 4—Mounting wallplate or subbase on horizontal outlet box.
M1553A
EXISTING
HORIZONTAL
OUTLET BOX
HEATING/
COOLING
SUBBASE
AUTO OFF
COOL
HEATON
FAN
R
G
O
W
Y
B
M1554A
B
O
W
Y
R
G
VERTICAL
OUTLET
BOX
ADAPTER
RING
1
2
NOT INCLUDED WITH UNIT.
ACCESSORY PARTS AVAILABLE.
SUBBASE OR
WALLPLATE
1
2
2
COVER
PLATE
MOUNTING
SCREWS (2)
EXISTING
HORIZONTAL
OUTLET BOX
WALLPLATE
R
W
M1816