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Page 20
IM 796
Figure 22. Installing Filters
Filter Replacement
Replace the electrostatic air purifying and deodorizing filters
every 6 months or sooner if they turn brown.
Replacement filters can be purchased from your sales repre-
sentative or distributor.
Use the new filter immediately once it has been removed
from the package.
Auto Random Re-start Function
If there is a power loss to the building, the units will ran-
domly restart when the power is restored. Control will restart
at the last setting regardless of how long the power was off.
Low Ambient Kit
With this option, the unit can cool down to 32°F outdoor
temperature. (Standard units only cool down to 66°F.) To
install, wire the Fan Speed Control Module (FSCM) in the
outdoor unit per wiring diagram on Page 15. Attach the Out-
door Coil Sensor to the return bend as shown in
Figure 23
.
Wrap sensor and return bend with insulating tape to promote
accurate sensing of the refrigerant temperature. Refer also to
the instructions supplied with the kit.
Figure 23. Low Ambient Kit Location
Minimum and Maximum Operating
Temperatures
Cooling
Heating (heat pump only)
Ts = Dry Bulb Temperature, Th = Wet Bulb Temperature
* 32 °F with optional Low Ambient Kit
WARNING
Disconnect the main power supply before opening the
return air grille.
DO NOT restore power until the grille is closed.
Open Grille
Slide Out Main Filters
Slide Back Main Filters
Insert the Electrostatic
and Deodorizing Filters
1
2
3
4
Temperature
Ts °F
Th °F
Minimum Indoor
67
57
Maximum Indoor
80
67
Minimum Outdoor
*66
57
Maximum Outdoor
115
75
Temperature
Ts °F
Th °F
Minimum Indoor
50
—
Maximum Indoor
80
—
Minimum Outdoor
16
16
Maximum Outdoor
75
65
Fan
Motor
Condenser
Coil
Condenser Inlet
Control
Module
Power
Supply
Temperature
Sensor
Condenser
Outlet
1/3 of Condenser
Coil Height