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of the circuit being connected to one of the provided neutral
terminals. If an accessory rated at greater than one amp is
connected to this terminal, it is necessary to use an exter-
nal relay.
One line voltage HUM" 1/4" spade terminal is provided on
the furnace integrated control. See figure 24 for integrated
control configuration. This terminal is energized in the
heating mode when the combustion air inducer is operat-
ing. Any humidifier rated up to one amp can be connected
to this terminal with the neutral leg of the circuit being con-
nected to one of the provided neutral terminals. If a humidi-
fier rated at greater than one amp is connected to this termi-
nal, it is necessary to use an external relay relay.
Generator Use − Voltage Requirements
The following requirements must be kept in mind when
specifying a generator for use with this equipment:
S
The furnace requires 120 volts + 10% (Range: 108
volts to 132 volts).
S
The furnace operates at 60 Hz + 5% (Range: 57 Hz to
63 Hz).
S
The furnace integrated control requires both polarity
and proper ground. Both polarity and proper grounding
should be checked before attempting to operate the
furnace on either permanent or temporary power.
S
Generator should have a wave form distortion of less
than 5% THD (total harmonic distortion).
Thermostat
Install the room thermostat according to the instructions
provided with the thermostat. See figure 22 for thermostat
designations. If the furnace is being matched with a heat
pump, refer to the FM21 installation instruction or appropri-
ate dual fuel thermostat instructions.
Thermostat
Furnace
Condensing
Unit
80AF1DF and CONDENSING UNIT
THERMOSTAT DESIGNATIONS
(Refer to specific thermostat and outdoor unit.)
COMMON
POWER
HEAT
INDOOR BLOWER
Y
C
R
G
W1
Y
C
R
G
W
COOLING
FIGURE 22
CONDENSING
UNIT
CONDENSING
UNIT COMMON
*CONDENSING
UNIT
*NOTE − R" REQUIRED ON SOME OUTDOOR UNITS
Indoor Blower Speeds
1 − When the thermostat is set to FAN ON," the indoor
blower will run continuously on the heating speed
when there is no cooling or heating demand.
2 − When the 80AF1DF is running in the heating mode, the
indoor blower will run on the heating speed.
3 − When there is a cooling demand, the indoor blower will
run on the cooling speed.
