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Single Stage Thermostat Operation
The automatic heat staging option allows a single stage
thermostat to be used with a two-stage WGFE furnace. To
activate this option, move the jumper pin to desired setting
(5 minutes or 10 minutes). The furnace will start on first stage
heat and stay at first stage heat for the duration of the selected
time before switching to second stage heat.
W1 on the control board must be connected to W1 on the
thermostat.
Circulating Airflow Adjustments
Cooling Mode
The units are factory set for the highest airflow for each model.
Adjustments can be made to the cooling airflow by repositioning
the jumper plug marked COOL - A, B, C, D based on the
information found in the Application Table For Cooling Airflow
Adjustments. To determine what CFM the motor is delivering at
any time, count the number of times the amber LED on the
control board flashes. Each flash signifies 100 CFM; count the
flashes and multiply by 100 to determine the actual CFM
delivered (for example: 10 flashes x 100 = 1,000 CFM).
Application Table for Cooling Airflow Adjustment
Model #*
Motor HP
¹⁄₃
50V12
¹⁄₂
75V14
¹⁄₂
100V14
³⁄₄
100V20
³⁄₄
125V20
³⁄₄
150V20
For heating airflow adjustments (all models): Moving the ADJUST tap from NORM to (+) will increase airflow by 10%. Moving the
ADJUST tap from NORM to (-) will decrease the airflow by 12%.
*Only the portion of the model number (#) that indicates furnace input is shown.
1. Set the room thermostat to the lowest setting.
2. Disconnect power.
3. Remove burner access door.
18
Heating CFM @ .5 Static
ADJUST Setting
HEAT Setting
NORM
A
NORM
A
NORM
C
NORM
A
NORM
B
NORM
C
Shut Down
Heating Mode
The unit as shipped is factory set to run at the middle of the
heating rise range as shown on the unit rating plate. If higher or
lower rise is desired, change the rise 15% up or down by moving
the ADJUST jumper plug from NORM position to the (+) or (-)
position. This adjustment will also cause the cooling airflow to be
raised or lowered by 15%.
The TEST position on the ADJUST tap is not used.
Control Board Taps
Cooling CFM @ .5 Static
High
Low
A
Fire
Fire
750
600
1,200
1,000
750
1,400
1,200
900
1,400
1,150
700
2,000
1,600
950
2,000
1,450
850
2,000
4. Shut off the gas by moving the gas control switch to the OFF
position.
5. Replace the burner access door.
B
C
D
1,000
800
600
1,200
1,000
800
1,200
1,000
800
1,800
1,600
1,400
1,800
1,600
1,400
1,800
1,600
1,400
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