CACG/CAHG & CACH/CAHH
Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008108, Rev. B [082509]
25
Initial Start-Up — CACG/CAHG Units ONLY
(continued)
WARNING
Electrical shock hazard
— Turn off
power to indoor and outdoor units is off
before proceeding.
Reconnect the wire to “Y” on the outdoor
5.
unit to enable the compressor.
Turn on power to the indoor and outdoor
6.
units.
Check condensate pump
operation
Remove an adjacent ceiling tile to access
1.
the condensate pump cover panel.
Insert a squeeze water bottle nozzle
2.
through the opening in the condensate
pump access panel and fill drain pan. See
Figure 31, Page 25.
Adding water will activate the float switch
3.
and the pump. Water must flow regularly
with condensate pump energized. If water
does not, check the pipe slope or see if
there are any pipe restrictions.
Ensure that all covers, panels and filters
4.
are in place and discharge louvers are
correctly positioned.
NOTICE
The unit is equipped with a safety switch
that will activate the pump when the
condensate reaches a critical level. The
safety switch will also de-energize the
compressor if the water level becomes
too high.
Check cooling operation
Cooling-only systems — Turn the system
1.
power on and turn down the system set-
point to activate the compressor.
Check heat pump operation
Heat pump systems — Turn up the
1.
system setpoint to activate heat pump
(compressor) operation.
Place the system controls into heating
2.
mode, with the setpoint 1°F above room
temperature (or meeting the require-
ments for 1st stage heating operation).
Verify compressor start up, noise, vibra-
tion, and overall system operation.
Next, alter the setpoint until the 2nd stage
3.
of heat is called (this action is dependent
on both options and controls contained
in the system).
NOTICE
Second state heating requires both
optional electric heat and a means of
control.
Additional cassette units
Repeat the start-up procedure for all cas-
1.
sette units in the system.
Checking condensate pump
Figure 31
operation
