Allied Air A97USMV Installation Instructions Manual page 41

8. One line voltage "HUM" 1/4" spade terminal is provided
on the furnace integrated control. Any humidifier or
other 120V 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. See Figure 41 for location of terminal. This
terminal is energized in the heating mode when the
indoor blower is operating.
9. One 24V "H" terminal is provided on the furnace
integrated control terminal block. Any humidifier rated
up to 0.5 amp can be connected to this terminal with
the ground leg of the circuit being connected to either
ground or the "C" terminal. See Figure 41 for location
of terminal.
10. Install the room thermostat according to the instructions
provided with the thermostat. See Table 11 for
thermostat connections. If the furnace is being matched
with a heat pump, refer to the instruction packaged with
the dual fuel thermostat.
Run Length – Non Communicating
507028-03
Table 13
Thermostat Selection
This unit is designed to operate in a variable rate capacity
mode using a two-stage thermostat. This unit will
automatically adjust firing rate based upon thermostat cycle
times.
For optimal performance use a high quality electronic digital
thermostat or any other with adjustable settings for 1st stage
/ 2nd stage on / off differentials and adjustable stage timers.
The following is a two-stage thermostat setup for optimal
variable rate capacity mode:
First heat stage differential set to 1/2 to 1° F; second heat
stage differential set to 1/2 or 1° F; second heat stage
upstage timer disabled, or set to maximum (1 hr. minimum).
Indoor Blower Speeds
1. When the thermostat is set to "FAN ON", the indoor
blower will run continuously at a percentage of the
second stage cooling speed when there is no cooling
or heating demand.
2. When the unit is running in the heating mode, the
integrated control will automatically adjust the blower
speed to match the furnace firing rate. This speed can
be adjusted up or down by 7.5% or 15% using DIP
switches 14 through 16 for the low heat speed and 17
through 19 for the high heat speed.
3. When there is a cooling demand, the indoor blower will
run on the cooling speed designated by the positions of
DIP switches 8 through 11.
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% RHD.
Issue 1622 Page 41 of 74