2
INSTALLATION
Select Thermostat Location —
The thermostat should
be mounted:
• approximately 5 ft from the floor
• close to or in a frequently used room, preferably on an
inside partitioning wall
• on a section of wall without pipes or ductwork
• where temperature operating limits are within 32 to
122F(0°to50C)
• where humidity operating range is within 0 to 95% rela-
tive humidity, non-condensing
The thermostat should NOT be mounted:
• close to a window, on an outside wall, or next to a door
leading to the outside
• where exposed to direct light and heat from a lamp, the
sun, a fireplace, or any other temperature-radiating
object which may cause a false reading
• close to or in direct airflow from supply registers or
return air grilles
• in areas with poor air circulation (such as behind a door
or in an alcove)
Install Thermostat (With Junction Box)
1. Turn off all power to unit.
2. If an existing thermostat is being replaced:
a. Remove existing thermostat from the wall.
b. Disconnect wires from existing thermostat. Do not
allow wires to fall back into the wall. As each wire
is disconnected, record wire color and terminal
connection.
c. Discard or recycle old thermostat.
NOTE: Mercury is a hazardous waste and must be
disposed of properly.
3. Install 2 x 4-in. junction box (field-supplied) in wall. See
Fig. 1.
4. Route thermostat wires through back of junction box. Re-
move outer sheath from wires for added flexibility.
Standard solid or multi-conductor thermostat wire should
be used from the thermostat to the unit. Size and length
considerations are as follows: for a maximum distance
from unit of 36 ft, use 22 AWG (American Wire Gage)
wire; for a maximum distance from unit of 100 ft, use
18 AWG wire.
5. Adjust wire length and routing to allow proper closure of
the thermostat. Strip each wire at the end no more than
1
/
4
-in. to prevent adjacent wires from shorting together.
Match and connect wires to terminals on the thermostat.
See Fig. 2 and Table 1.
6. Push excess wiring into wall. Seal hole in junction box to
prevent drafts.
7. Attach thermostat to junction box.
Before installing thermostat, turn off all power to the unit.
There may be more than one power disconnect. Electrical
shock can cause injury or death.
Improper wiring or installation may cause damage to the
thermostat. Check to ensure wiring is correct before pro-
ceeding with installation of thermostat.
MOUNTING
HOLE
2 x 4-in.
STANDARD
FIELD-SUPPLIED
JUNCTION BOX
WIRING
MOUNTING
HOLE
WALL
THERMOSTAT
EXTENDS
LESS THAN
3/8” FROM
THE WALL
.366”
WALLWALL
JUNCTION
BOX
SIDE
VIEW
Fig. 1 — Thermostat Mounting
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