CACG/CAHG/CAHJ & CACH/CAHH/CAHK
Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts
40
P/N 240008108, Rev. G [07/08/10]
CACH/CAHH/CAHK Microprocessor Controller Operation
(continued)
Cooling mode
For cooling operation, fi rst turn the unit on
via the POWER/SEND butt on.
Select Cooling mode via the MODE
1.
butt on.
The room temperature and set point
2.
temperature will be displayed.
Th
e setpoint temperature will change by
3.
one degree with each successive press
of the UP or DOWN ARROW butt ons.
Holding the button in will change the
temperature rapidly.
Place the setpoint temperature below the
4.
room temperature.
Th
e compressor will start and cooling will
5.
continue for a minimum of two minutes
and as long as the setpoint remains below
room temperature.
Th
e Cooling LED will illuminate as long
6.
as the unit is calling for cooling.
Once the room temperature is satisfi ed for
7.
at least sixty seconds and the two-minute
minimum run time has elapsed the com-
pressor will cycle off .
Th
e fan will operate as described in “Fan
8.
Operation.” see pg. 39
NOTICE
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).
Heating mode
Optional Electric heat operation (Air
Conditioning unit outdoors)
For operation with electric heat the control
must first be configured properly (Heat
Source – ON (Table 6, pg. 32), Heat Pump –
OFF (Figure 36, pg. 35).
For electric heat operation, fi rst turn the unit
on via the POWER/SEND butt on.
Th
en select Heating mode via the MODE
1.
butt on.
Th
e room temperature and setpoint tem-
2.
perature will be displayed.
Press either the UP or DOWN ARROW
3.
butt ons to change the setpoint tempera-
ture.
Th
e setpoint temperature will change by
4.
one degree with each successive press
of the UP or DOWN ARROW butt ons.
Holding the butt on down will change the
temperature rapidly.
Place the setpoint temperature above
5.
room temperature.
Th
e electric heat will energize and heat-
6.
ing will continue as long as the setpoint
remains above room temperature.
Th
e Heating LED will illuminate as long
7.
as the unit is calling Heating mode.
When the room temperature has been
8.
satisfied for at least sixty seconds and
the two-minute minimum on-time has
expired, the electric heat will switch off .
Th
e fan will operate as described in “Fan
9.
Operation.” see pg. 39