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Fan Control
Ignition Control 103217-03
The fan on time of 45 seconds is not adjustable. The heat
fan off delay (amount of time that the blower operates after
the heat demand has been satisfied) may be adjusted by
changing the jumper position across the five pins on the
integrated control. The unit is shipped with a factory fan
off delay setting of 90 seconds. The fan off delay affects
comfort and is adjustable to satisfy individual applications.
Adjust the fan off delay to achieve a supply air temperature
between 90° and 110° F at the moment that the blower
is de-energized. Longer off delay settings provide lower
return air temperatures; shorter settings provide higher
return air temperatures. See Figure 36.
Ignition Control 107163-01
The heat fan-on time of 30 seconds is not adjustable The
heat fan-off delay (amount of time that the blower operates
after the heat demand has been satisfied) may be adjusted
by changing the two position dip switch on the integerated
control, to one of four slections. Blower off delay is factory
set at 90 seconds. For other blower off delay settings,
please refer to Table 13.
60
90*
120
180
* Factory setting
Table 13. Blower Delay Select
NO JUMPER
To adjust fan-off timing, reposition jumper across pins to
achieve desired setting.
60 Second
90 Second
off Time
off Time
Figure 36. Heat Fan Off Time in Seconds
Constant Torque Motor
These units are equipped with a constant torque ECM
motor. It has a DC motor coupled to an electronic control
module,both contained in the same motor housing. The
motor is programmed to provide constant torque at each of
Page 28 of 36
SW2-1
SW2-2
OFF
ON
OFF
OFF
ON
OFF
ON
ON
120 Second
180 Second
off Time
off Time
the five selectable speeds. The motor has five speed taps.
Each tap requires 24 volts to energize.
Thermostat Heat Anticipation
Set the heat anticipator setting (if adjustable) according to
the amp draw listed on the wiring diagram that is attached
to the unit.
NOTE: Do not secure the electrical conduit directly to the
air ducts or structure.
Electrical
1. Check all wiring for loose connections.
2.
Check for the correct voltage at the furnace (furnace
operating). Correct voltage is 120VAC ± 10%.
3.
Check amp-draw on the blower motor with inner
blower panel in place.
Unit Nameplate__________ Actual_______________
Blower Speeds
Follow the steps below to change the blower speeds.
1. Turn off electrical power to furnace.
2.
Remove blower access panel.
3.
Disconnect existing speed tap at integrated control
speed terminal.
NOTE: Termination of any unused motor leads must
be insulated.
4.
Place unused blower speed tap on integrated control
"PARK" terminal or insulate.
5.
Refer to blower speed selection chart on unit wiring
diagram for desired heating or cooling speed. See
Blower performance data. See Table 15 for allowable
heating speeds.
6.
Connect selected speed tap at integrated control
speed terminal.
7.
Resecure blower access panel.
8.
Turn on electrical power to furnace.
9.
Recheck temperature rise.
Other Unit Adjustments
Primary and Secondary Limits
The primary limit is located on the heating compartment
vestibule panel. The secondary limits (if equipped) are
located in the blower compartment, attached to the back
side of the blower. These auto reset limits are factory set
and require no adjustment.
Flame Rollout Switches
This manually reset switches are located on the Front of
the burner box.
Issue 2209
507330-03G / 31-5000662
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