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8.
An unpowered, normally open (dry) set of contacts with
a 1/4" spade terminal "HUM" are provided for humidifier
connections and may be connected to 24V or 120V.
Any humidifier rated up to one amp can be connected
to these terminals. In 120V humidifier applications, the
neutral leg of the circuit can be connected to one of the
provided neutral terminals. This terminal is energized
in the heating mode.
9.
Install the room thermostat according to the instructions
provided with the thermostat. If the furnace is being
matched with a heat pump, refer to the instruction
packaged with the dual fuel thermostat.
Indoor Blower Speeds
1.
When the thermostat is set to "FAN ON," the indoor
blower will run continuously on the field selectable
fan speed ("LOW HEAT" is default) when there is no
cooling or heating demand. See Table 21 for allowable
continuous circulation speeds.
2.
When the unit is running in the heating mode, the
indoor blower will run on the 'LOW HEAT" or "HIGH
HEAT" speed per demand.
3.
When there is a cooling demand, the indoor blower
will run on the "LOW COOL" or "HIGH COOL" speed
per demand.
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).
Page 36 of 52
Electrical Wiring
Risk of electrical shock. Disconnect electrical power
at the circuit breaker or service panel before making
electrical connections. Failure to disconnect power
supplies can result in property damage, personal injury,
or death.
The furnace must be grounded and wired in accordance
with local codes or, in the absence of local codes, with the
National Electrical Code ANSI/NFPA No. 70 (latest edition)
and/or CSA C22.1 Electrical Code (latest edition) if an
external electrical source is utilized.
In all instances, other than wiring for the thermostat,
the wiring to be done and any replacement of wire shall
conform with the temperature limitation for Type T wire
–63°F (35°C) rise.
Connect a sufficiently sized wire with ground to the
furnace's line voltage connections and ground wire. Refer
to the furnace rating plate for electrical characteristics
to be used in sizing field supply wiring and overcurrent
protection.
The line voltage supply should be routed through a readily
accessible disconnect located within sight of the furnace. A
junction box on the furnace side panel is provided for line
voltage connections. Refer to the furnace wiring diagram
for specific connection information.
Proper polarity of the supply connections ("HOT" and
"NEUTRAL") must be observed to ensure that safety
controls provide the protection intended.
A connection to the unit's ground wire and actual earth
ground (typically a ground stake or buried steel pipe) must
be maintained for proper operation.
Issue 2327
WARNING
508391-01
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