# 45466K003
Page 18
Thermostat
Install a room thermostat according to the instructions
furnished with it. Select a location on an inside wall that is
not subject to drafts, direct sunshine, or other heat
sources. The initial heat anticipator setting should be equal
to the total current draw of the control circuit.
Low voltage thermostat connections are to be made to the
blower control board as indicated on the wiring diagram.
Humidifier
Terminals are provided on the blower control board for
connection to a 120-volt humidifier. The
“
HUM
”
terminal is
energized whenever the thermostat calls for heat. Refer to
furnace wiring diagram for specific connection information.
Continuous Low Speed Blower
If continuous blower operation on low speed is desired,
connect the lowest speed motor tap to the
“
CONT
”
terminal on the blower control board (refer to the furnace
wiring diagram.) The blower will operate on low speed
whenever main power is connected to the furnace, except
when it operates on heating or cooling speed during
thermostat call for heat or cooling.
This constant air
terminal is intended for low speed only.
If a motor is
wired for a higher speed, the increased amp draw could
cause the board control to fail and void the warranty.
Electronic Air Cleaner
Terminals are provided on the blower control board for
connection of a 120-volt electronic air cleaner. The
“
EAC
”
terminal is energized whenever the thermostat is calling
for heat, cooling, or continuous blower. Refer to the
furnace wiring diagram for specific connection information.
Twinning
The blower control board is designed to permit
“
twinning
”
of furnaces (two furnaces connected to a common supply
and return air system, and controlled by one thermostat).
An accessory kit must be ordered from the manufacturer.
Specific wiring and operating instructions are included
with the kit.
Each furnace must have its own dedicated vent system.
Table 3
Minimum Filter Requirements
1. The Airflow Descriptor is the two digits following
the
“
D
”
in the model number.
2. Areas and dimensions shown for cleanable filters
are based on filters rated at 600 feet per minute
face velocity.
3. Typical filter sizes are shown; however, any
combination of filters whose area equals or
exceeds the minimum area shown is satisfactory.
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