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Accessory Terminals
One line voltage “EAC” 1/4” spade terminal is provided on
the furnace integrated control. See figure 30 for integrated
control configuration. This terminal is energized when the
indoor blower is operating. Any accessory rated up to one
amp can be connected to this terminal with the neutral leg
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 30 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:
The furnace requires 120 volts + 10% (Range: 108
volts to 132 volts).
The furnace operates at 60 Hz + 5% (Range: 57 Hz to
63 Hz).
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.
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 29 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.
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 80AF1UH 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.
