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Circulator Blower Speeds; Normal Sequence Of Operation; Power Up; Heating Mode-Mode Dip Switch Set To 1 Stg Position - Whirlpool WGFM195 Installation Instructions Manual

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Circulator Blower Speeds

WARNING
To prevent premature failure of heat exchanger, property
damage, personal injury or death, do not adjust the limit
control (factory set).
This furnace is equipped with a multispeed circulator blower. This
blower provides ease in adjusting blower speeds. The
Specification Sheet applicable to your model provides an airflow
table, showing the relationship between airflow (CFM) and
external static pressure (E.S.P.), for the proper selection of
heating and cooling speeds. The cooling blower speed is set at
High and the heating blower speed is set as indicated in the
Specification Sheet applicable to your model. These blower
speeds should be adjusted by the installer to match the
installation requirements so as to provide the correct heating
temperature rise and correct cooling CFM.
To adjust the circulator blower speed, proceed as follows:
1. Turn off the power to the furnace.
2. Select the heating and cooling blower speeds that match the
installation requirements from the airflow table in the
Specification Sheet.

Power Up

The normal power up sequence is as follows:
115 VAC power applied to furnace.
Integrated control module performs internal checks.
Integrated control module LED will light.
Integrated control module monitors safety circuits
continuously.
Furnace awaits call from thermostat.
Heating Mode—Mode DIP Switch Set to
1 STG Position
The normal operational sequence in heating mode is as follows:
R and W thermostat contacts close, initiating a call for heat.
Integrated control module performs safety circuit checks.
Induced draft blower is energized for a 15-second prepurge
period causing the pressure switch contacts to close.
Igniter warm-up begins after 15-second prepurge expires.
Low-stage and high-stage gas control valves open at the end
of the igniter warm-up period, delivering gas to the burners
and establishing flame.
Integrated control module monitors flame presence. Gas
control valve will remain open only if flame is detected.
Circulator blower is energized on high heat speed following a
fixed 30-second blower on delay. Electronic air cleaner
terminals are energized with circulator blower.
Furnace operates; integrated control module monitors safety
circuits continuously.
R and W thermostat contacts open, completing the call for
heat.
Gas control valve closes, extinguishing flame.
Induced draft blower is de-energized following a 15-second
post purge.
The circulator blower remains at high-heat speed for
30 seconds. The circulator blower then switches to low-heat
speed for the remainder of the selected heat-off delay period.
36

NORMAL SEQUENCE OF OPERATION

3. Relocate the desired motor leads to the circulator blower heat
and cool speed terminals on the integrated control module.
(Terminals are identified as LO HEAT-H, HI HEAT-H and
COOL-H (hot)). If a heating speed and the cooling blower
speed are the same, a jumper wire must be used between the
heat and cool terminals.
4. Connect all of the unused blower motor leads to the "PARK"
terminals on the integrated control module. Any leads not
connected to the "PARK" terminals must be taped.
5. Turn on the power to furnace.
6. Verify the proper temperature rise as outlined in "Temperature
Rise."
Circulator Blower Speeds
Low
Medium Low
Medium
High
Common/Neutral
For example, the selected heat-off delay period is
150 seconds. The circulator blower operates at high heat for
30 seconds and at low speed for 150 - 30 = 120 seconds.
Heating Mode—Mode DIP Switch Set to
2 STG Position
The normal operational sequence in heating mode is as follows:
R and W thermostat contacts close, initiating a call for heat.
Integrated control module performs safety circuit checks.
Induced draft blower is energized for a 15-second prepurge
period causing the pressure switch contacts to close.
Igniter warm-up begins after 15-second prepurge expires.
Low-stage and high-stage gas control valves open at the end
of the igniter warm-up period, delivering gas to the burners
and establishing flame.
High-stage gas control valve closes after 5 seconds;
low-stage gas control valve remains open.
Integrated control module monitors flame presence. Gas
control valve will remain open only if flame is detected.
Circulator blower is energized on low-heat speed following a
fixed 30-second blower on delay. Electronic air cleaner
terminals are energized with circulator blower.
Furnace is now operating in low-stage heating mode.
Furnace operates; integrated control module monitors safety
circuits continuously.
If low-stage delay period expires, control will shift operation
from low-stage heating mode operation to high-stage heating
mode operation. Control will energize circulator blower
high-heat speed and high-stage gas control valve.
Furnace is now operating in high-stage heating mode.
R and W thermostat contacts open, completing the call for
heat.
Induced draft blower is de-energized following a 15-second
post purge.
Circulator blower is de-energized following a heat-off delay
period (selectable 100 to 150 seconds; factory-set at
150 seconds).
Red
Orange
Blue
Black
White

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