12
the accessories installed with the unit. Select a
thermostat which operates in conjunction with
the installed accessories. The thermostat should
be mounted about fi ve feet above the ground on
an inside wall. The thermostat should be kept
away from drafts, slamming doors, lamps, direct
sunlight, or in line with the supply air fl ow.
To install the thermostat:
1. Position the sub base on an inside wall and
mark the mounting holes and thermostat
cable openings.
2. Cut out the cable opening and route the
thermostat cable from the unit’s low voltage
compartment to the thermostat location.
The thermostat cable is supplied by the
installer.
3. Connect the cable leads to the sub base
or thermostat terminals and to the unit’s
low voltage pigtails as shown in
Figure 10
.
A system wiring diagram is also provided
on the inside of the control panel cover.
4. Secure sub base or thermostat to the
wall using screws provided with the
thermostat.
5. If sub base is used, install the correct
thermostat housing to sub base.
6. Refer to thermostat instruction sheet for
complete detailed mounting information.
Defrost Cycle Timer —
The defrost cycle timer
controls the time interval of the hot gas defrost
after the defrost sensor closes. It is located in
the lower left corner of the defrost control board
on the low voltage side of the control box. Three
interval settings are available: 30 minutes, 60
minutes, and 90 minutes. Time setting selection
is dependent on the climate where the unit is
being installed.
Example 1. Dry climate of Southern Arizona.
A 90 minute setting is recommended.
Example 2. Moist climate of Seattle,
Washington. A 30 minute setting is
recommended.
To set the cycle timer, place the timing pin on
the defrost control board to the desired time
interval post.
Note:
All units are shipped from the factory with
the default time setting of 30 minutes.
Field Installed Electric Heat —
These Single
Package Heat Pumps are designed to allow
optional electric heat to be fi eld installed as
required by the building’s particular heating load.
The options available for each unit are shown in
the heater kit installation instructions. As noted
in the instructions, a fi eld installed circuit breaker
kit is available as a means of electrical discon-
nect for the unit.
Install the heater kits as directed by the installation
instructions that come as part of the heater kit.
Follow all cautions and warnings as directed.
START UP AND SYSTEM CHECK
Pre-Start Check List
•
Verify that the unit is level to allow proper
condensate drainage.
•
Verify that there is free airfl ow to and from
the outdoor coil and that all clearance
requirements are met.
•
Verify that the duct work is sealed to prevent
air leakage.
•
Verify that the line voltage power leads are
securely connected and the unit is properly
grounded.
Figure 11. Motor Lead Connector
PIN NUMBER
MOTOR SPEED
WIRE COLOR
1
LOW
RED
2
4
HIGH
BLACK
3
MEDIUM
BLUE
5
N/A
N/A
6
COMMON
WHITE
1
2
4
3
5
6
RED
BLACK
BLUE
WHITE
