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CACH/CAHH Remote Thermostat Operation
Set DIP switch #4 to ON
For Remote Thermostat Operation the
control must be configured through the DIP
switches located on the control board located
in the control box.
1.
Set DIP switch #4 to ON (see
Page 32).
2.
In remote thermostat mode, the control
will not accept commands from the infra-
red remote control.
3.
The filter check timer will default to
1000 Hrs.
Fan Operation
The cassette unit utilizes a two-speed motor.
In remote thermostat operation, fan speed
selection can be made through the DIP switch
settings located on the main control board
(Figure 34, Page 33).
1.
With DIP switch #3 set to ON, the fan
speed will be set to High.
2.
With DIP switch #3 set to OFF, the fan
speed is set to Low.
3.
See
Table 6, Page 32 for other available
DIP switch selections.
The remote thermostat will control the call
for fan operation (on or off) through the low-
voltage terminals "R" and "G".
1.
When the remote thermostat connects
"R" to "G" the fan will energize.
2.
After the thermostat has been satisfied and
the call for heating or cooling has been
removed, the indoor fan will remain on
for an additional sixty (60) seconds. This
increases efficiency by pulling the remain-
ing energy from the unit.
Some thermostats are equipped with an
AUTO/ON fan switch. When this switch is
placed in the ON position, the fan will run
continuous. When the switch is in the AUTO
position, the fan will cycle with the call for
heating or cooling.
P/N 240007756, Rev. A [051509]
CACG/CAHG & CACH/CAHH
• Installation, Operation and Maintenance Manual •
Cooling operation
The remote thermostat will control the call
for cooling operation (on or off) through the
low-voltage terminals R and Y.
1.
After connecting the thermostat to the
Table 6,
unit, place the system switch in Cooling
mode.
2.
Adjust the setpoint temperature below the
room temperature.
3.
The compressor and fan motors will start
and cooling will begin.
4.
Next, place the setpoint temperature
above the room temperature. The outdoor
condenser will stop.
5.
The fan will operate as described in "Fan
Operation. "
Once the cooling has cycled off or fol-
lowing a power outage, the compressor
will not restart for at least three minutes
(anti-short-cycle timer).
Reversing Valve
EMI outdoor heat pump units utilize a
reversing valve that is energized in Cooling
mode. Make sure that the thermostat selected
will energize the reversing valve in Cooling
mode.
45
Air Handlers
NOTICE
Made in the USA
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Troubleshooting
