4
INSTALLATION CONSIDERATIONS
The controller should be mounted:
• at a location that allows easy access
• on a section of wall without water or drainage pipes
The controller should
NOT
be mounted:
• near heat sources such as direct sunlight, heaters, dimmer
switches, and other electrical devices.
INSTALLATION
To install the controller, perform the following procedure:
1.
Turn off all power to the outdoor units, indoor units, and
MDCs.
2.
Control Wire: Use 16 to 20 AWG (American Wire Gage),
stranded twisted pair shielded 2-core wiring (copper
wire). Be sure the distance between the controller and the
furthest outdoor units is not more than 3937 ft. Field-
Provided 24VAC Power Wire: Use copper wire rated
for the current requirement shown in Table 3; follow
all applicable electrical codes.
3.
For flush-mount installation, provide a 10-1/4" by 6-5/8"
opening in drywall or mounting surface to accommodate
the mounting box.
4.
Pull all wires through drywall or surface opening, and
then through knockout(s) in Mounting Box.
5.
Install the Mounting Box (3) into the 10-1/4” by 6-5/
8” opening in dry wall or mounting surface making
sure the box is flush with the wall surface. See Figure
3. Use the 6 short screws to fasten the plastic mounting
box. Use plastic washers as needed for alignment and
to prevent damage to components.
6.
Install Mounting Plate:
Make sure the metal hooks are facing upward. Attach the
mounting plate (2) onto the mounting box (3) using the four
long screws (4) and four plastic washers. Do not overtighen the
screws. See Figures 4 and 5.
WARNING
Electrical shock can cause personal injury and death.
Before installing thermostat, shut off all power to this
equipment during installation. There may be more
than one power disconnect. Tag all disconnect
locations to alert others not to restore power until
work is completed.
CAUTION
Failure to follow this caution may result in equipment
damage or improper operation.
Improper wiring or installation may damage the
thermostat. Check to make sure wiring is correct
before proceeding with installation or turning on unit.
CAUTION
Over-tightening the screw will cause deformation to
the rear cover and LCD damage.
Fig. 3 — Installing the Mounting Box
wall
wall
ĸ
ĺ
wall
Fig. 5 — Installing the Back Plate to Box
Fig. 4 — Installing the Back Plate Washers
