CACG/CAHG & CACH/CAHH
Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts
38
P/N 240008108, Rev. B [082509]
CACH/CAHH Microprocessor Controller Operation
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.
NOTICE
The controller must be configured with
Remote Thermostat OFF
to operate us-
ing the infrared remote controller. See
(Table 6, pg. 32) for details. (Remote
Thermostat ON means the unit will be
controlled by a remote thermostat.)
Handheld remote operation
When power is first applied to the control or
after a power outage there is a three minute
delay before the compressor or electric heat
will energize. This is to protect the unit from
short cycling.
Pointing the remote
When entering commands into the remote,
make sure it is pointed toward the cassette’s
infrared receiver window (see Figure 34,
Page 33). The cassette will respond with a
beep indicating that it has successfully re-
ceived the transmitted information.
Synchronization
There may be occasions when the remote
and the cassette’s main control board mode
synchronization or are not in the same mode.
This can happen if commands are entered
into the remote, but it is not pointed at the
cassette.
To re-synchronize:
Enter any command into the remote
•
while pointing it at the cassette’s infrared
receiver window.
Alternatively, hold the POWER/SEND
•
button for two seconds. All of the optional
remote’s settings will be transmitted to the
cassette. The cassette will respond with a
beep, indicating that it has successfully
received the transmitted information.
Temperature indication
The room temperature displayed on the re-
mote is the temperature at the remote. The
microprocessor control located in the cassette
does not read the remote’s temperature — it
uses a sensor located in the return air of the
cassette.
Therefore, the warming or cooling of the
remote alone will not effect the operation of
the Cassette. The Cassette will react to its local
temperature sensing element and the setpoint
selected and transmitted by the remote.
Transmission limits
The remote has a useful transmission distance
approximately twenty (20) feet when perpen-
dicular to the face of the Cassette. However,
this distance will vary and decrease when the
angle of transmission is not perpendicular.
This distance may also vary depending on the
lighting in the room.
Hibernate mode
If there is no activity on the remote for ten
minutes, it will enter a hibernate mode and the
display will go dark. While in hibernate mode,
pressing any button will awaken the remote.
The remote will return to the mode it was in
prior to entering hibernate mode.
