CACG/CAHG & CACH/CAHH
Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts
28
P/N 240007756, Rev. A [051509]
Initial Start-Up — CACH/CAHH Units ONLY
Set DIP switches
DO NOT turn on power until the DIP
1.
switches have been set and the control
panel cover replaced.
To access the DIP switches, remove the
2.
control panel cover (Figure 27, Page 22).
See Figure 33, Page 31 for location of the
switches on the control board.
Model CACH/CAHH units have four
3.
DIP switches, as described in Table 6,
Page 32.
DIP switch #1, Test mode, is used
a.
only during start-up and servicing,
to reduce time required for automatic
timers.
DIP switches #2, #3 and #4 are
b.
related to the (optional) use of a
remote thermostat. Switches 2 and 3
are operational only if switch #4 is set
to OFF, enabling remote thermostat
operation.
Set the switches as desired for the ap-
4.
plication.
Set controller configuration
Review the information in
1.
Figure 34,
Page 33 through Figure 37, Page 36 for
general operation of the controller and
handheld remote.
2. Figure 35, Page 34 explains how to set up
the controller using the handheld infrared
remote. (NOTE that the remote is a line-
of-sight device, and must be pointed at the
receiver on the unit-mounted display.)
Turn on power to the indoor unit so the
3.
controller can be operated.
Press and hold both the MODE and
4.
PROGRAM buttons on the remote for
5 seconds to enter
Configuration
mode
(as shown in Figure 35, Page 34).
Configure the controller using
5.
Figure 36,
Page 35.
After the configuration is completed,
6.
point the remote at the cassette unit’s dis-
play. Then press and hold the POWER/
NOTICE
To test cooling operation
Operation of the unit depends on the
room temperature. It may be necessary
to warm the room before testing the
unit’s cooling abilities.
NOTICE
When power is first applied to the con-
trol or after a power outage there is a
three minute delay before the compres-
sor or electric heat will energize. This is
to protect the unit from short cycling due
to loss of power.
WARNING
Electrical shock hazard
— Turn off
power to indoor and outdoor units is off
before proceeding.
Perform complete inspection
NOTICE
To perform a system electrical check:
Turn off all power to the indoor and
•
outdoor units.
Isolate the compressor (to prevent
•
it from operating until the check is
completed) by removing the con-
nection at the “Y” terminal on the
outdoor unit.
Remove any tools or other obstructions.
1.
Inspect all electrical connections.
2.
Separate any lines that contact each
3.
other.
Replace the control panel cover, filters
4.
and grilles.
Test each power and circuit connection
5.
before proceeding further.
