CACG/CAHG/CAHJ & CACH/CAHH/CAHK
Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts
26
P/N 240008108, Rev. G [07/08/10]
Initial Start-Up — CACG/CAHG/CAHJ Units ONLY
CAHG/CACG louver toggle
Figure 30
switch
Toggle Switch
NOTICE
CACG/CAHH/CAHK units
Th
ese units require sett ing of DIP
•
switches and controller functions
before proceeding with start-up.
Follow instructions beginning on
•
page 28 .
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 fi rst applied to the con-
trol or aft er a power outage there is a
three minute delay before the compres-
sor or electric heat will energize. Th
is 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, fi lters
4.
and grilles.
Test each power and circuit connection
5.
before powering up the system.
Perform electrical circuit checks
Switch on the cassett e unit and verify that
1.
the fan cycles correctly.
Models CAHG24 and CACG36 only —
2.
Check motorized vane operation by turn-
ing on with the toggle switch located on
the side of the electrical box ( Figure 30,
Page 26 ).
For units with electric heat, check opera-
3.
tion of the heating elements by switching
the system to the heating mode. Adjust
the thermostat setpoint above room
temperature.
Ensure that the outdoor unit start-up
4.
procedure has been completed as directed
in the unit’s instruction manual.