CACH/CAHH/CAHJ & CACH/CAHH/CAHK
Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008108, Rev. G [07/08/10]
41
CACH/CAHH/CAHK Microprocessor Controller Operation
(continued)
Optional Heat pump without Electric
heat (Heat Pump unit outdoors)
NOTICE
EMI heat pumps are intended to operate
with an indoor air handler, with electric
heat. If an indoor air handler without
electric heat is matched with a heat pump
condenser, the system will deliver cold
air during defrost.
For heat pump operation without electric heat
the control must fi rst be confi gured properly
(Heat Source – ON Table 6, pg. 32, Heat
Pump – OFF Figure 36, pg. 35).
For heat pump operation, turn the unit on via
the POWER/SEND butt on.
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 outdoor unit will energize in heat
6.
pump mode and heating 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 for heat.
When the room temperature has been
8.
satisfied for at least sixty seconds and
the two-minute minimum on-time has
expired, the compressor will switch off .
Th
e fan will operate as described in “Fan
9.
Operation.” see pg. 39
Optional Heat pump with Electric heat
(2-stage heating)
For heat pump operation with electric heat
the control must fi rst be confi gured properly
(Heat source – ON Table 6, pg. 32, Heat pump
– OFF Figure 36, pg. 35).
For heat pump operation with optional elec-
tric heat, 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 butt ons to
change the setpoint temperature.
Th
e setpoint temperature will change by
3.
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 the
4.
room temperature by one degree. The
compressor will start and heating will
continue for a minimum of two-minutes
and as long as the setpoint remains above
room temperature.
Th
e Heating LED will illuminate as long
5.
as the unit is calling for Heating mode.
When the room temperature has been
6.
satisfied for at least sixty seconds and
the two-minute minimum on-time has
elapsed, the compressor will switch off .
Th
e fan will operate as described in “Fan
7.
Operation.” see pg. 39
Next, place the setpoint temperature
8.
above the room temperature by at least
two degrees.
Th
e compressor will start and, the electric
9.
will also energize aft er a thirty-second
delay, thus two-stage heating.
Th
e electric heat will run for a minimum
10.
of two minutes and until the deviation
between room temperature and setpoint
temperature is less than two degrees.