CACG/CAHG & CACH/CAHH
Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240007756, Rev. A [051509]
29
Made in the USA
SEND button for 2 seconds. This will
transmit information from the remote
to the cassette. The cassette will respond
with a beep, indicating it has received
the information. (This step is necessary,
because it is possible that information en-
tered into the remote may not have been
received if the remote was not pointed
directly at the receiver.)
Do not set the time or 7-day program
7.
settings yet. This should be done after
start-up is completed.
Perform electrical circuit checks
Turn on power to the cassette unit.
1.
Verify fan and louver operation using the
2.
handheld remote. Use the procedures
given in Figure 35, Page 34.
Make sure the fan can be set to high,
a.
low and auto.
Make sure the louver can be set to run
b.
at full open or oscillation.
WARNING
Electrical shock hazard
— Turn off
power to indoor and outdoor units is off
before proceeding.
Reconnect the wire to “Y” on the outdoor
3.
unit to enable the compressor.
Turn on power to the indoor and outdoor
4.
units.
Verify compressor operation — all
systems
Place the system controls into cooling
1.
mode, with the setpoint below room
temperature.
Verify compressor start up, noise, vibra-
2.
tion, and overall system operation.
Then place the control setpoint above
3.
room temperature.
Verify that the compressor shuts down.
4.
Wait for the blower post purge to com-
5.
plete. Then verify that the system shuts
down properly.
Be sure to return DIP switch #1 (Test
6.
mode) to OFF before leaving the sys-
tem.
Verify cooling-only operation
This arrangement uses a cooling-only
1.
outdoor unit with no heat source in the
cassette (indoor) unit.
The configuration (
2.
Figure 36, Page 35)
should be set for Heat Source OFF, Heat
Pump OFF.
Use the remote to set MODE to Cool (see
3.
Figure 35, Page 34).
Use the remote to adjust setpoint tem-
4.
perature below the room temperature (at
the cassette unit).
The compressor should come on. Verify
5.
that supply air is cooler than room air.
Verify cooling with electric heat
This arrangement uses a cooling-only
1.
outdoor unit with electric heat option in
the cassette unit.
The configuration (
2.
Figure 36, Page 35)
should be set for Heat Source ON, Heat
Pump OFF.
Use the remote to set MODE to Cool (see
3.
Figure 35, Page 34).
Use the remote to adjust setpoint tem-
4.
perature below the room temperature (at
the cassette unit).
The compressor should come on. Verify
5.
that supply air is cooler than room air.
Use the remote to set MODE to Heat (see
6.
Figure 35, Page 34).
Use the remote to adjust setpoint tem-
7.
perature above the room temperature (at
the cassette unit).
The electric heaters should come on.
8.
Verify that supply air is warmer than
room air.
For automatic changeover between
9.
heat/cool, use the remote to enable auto
changeover (see Figure 35, Page 34).
