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Accessory Terminals
One line voltage “EAC” 1/4” spade terminal is provided
on the furnace integrated control. See FIGURE 59 for in-
tegrated control conguration. 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 pro-
vided neutral terminals. If an accessory rated at greater
than one amp is connected to this terminal, it is necessary
to use an external relay.
One line voltage “HUM” 1/4” spade terminal is provided on
the furnace integrated control. See gure 61 for integrat-
ed control conguration. This terminal is energized in the
heating mode when the combustion air inducer is operat-
ing. Any humidier rated up to one amp can be connect-
ed to this terminal with the neutral leg of the circuit being
connected to one of the provided neutral terminals. If a
humidier rated at greater than one amp is connected to
this terminal, it is necessary to use an external relay relay.
Thermostat
Install the room thermostat according to the instructions
provided with the thermostat. See gure FIGURE 58 for
thermostat designations.
If the furnace is being matched with a heat pump, refer to
the FM21 installation instruction or appropriate 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 ML193UH 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.
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 po-
larity and proper ground. Both polarity and proper
grounding should be checked before attempting to
operate the furnace on either permanent or tempo-
rary power
• Generator should have a wave form distortion of
less than 5% THD (total harmonic distortion).
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