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3. Knowing the furnace model, locate the high-stage cooling
airflow charts in the Specification Sheet applicable to your
model. Look up the cooling airflow determined in Step 2 and
find the required cooling speed and adjustment setting.
Example: A WGFM28070V4BX furnace installed with a
2.5 ton air conditioning system. The airflow needed is
1,000 CFM. Looking at the cooling speed chart for
WGFM28070V4BX, find the airflow closest to 1,000 CFM. A
cooling airflow of 990 CFM can be attained by setting the
cooling speed to B and the adjustment to “+” (plus).
4. Continuous fan speed is 30% of the furnace’s maximum
airflow capability.
Example: If the furnace’s maximum airflow capability is
2,000 CFM, the continuous fan speed will be
0.30 x 2,000 CFM = 600 CFM.
5. Locate the blower speed selection DIP switches on the
integrated control module. Select the desired cooling speed
tap by positioning DIP switches 1 and 2 appropriately. Select
the desired adjust tap by positioning DIP switches 3 and
4 appropriately. Refer to the following charts for DIP switch
positions and their corresponding taps. Verify CFM by noting
the number displayed on the dual 7-segment LED display.
Speed Taps—Adjust
Comfort Mode Profiles
The multispeed circulator blower also offers several custom On/
Off ramping profiles. These profiles may be used to enhance the
cooling performance and increase the comfort level. The ramping
profiles are selected using DIP switches 5 and 6. See the “Profile”
illustrations for DIP switch positions and their corresponding
taps. Verify CFM by noting the number displayed on the dual 7-
segment LED display.
Profile A
■
Provides a 1 minute Off delay at 100% of the cooling demand
airflow.
Profile B
■
Ramps up to 50% of the full cooling demand airflow for
30 seconds.
■
The motor then ramps to 100% of the required airflow.
■
Provides a 1 minute Off delay at 100% of the cooling demand
airflow.
Profile C
■
Ramps up to 82% of the full cooling demand airflow for
approximately 7
¹⁄₂
minutes.
■
The motor then ramps to 100% of the required airflow.
■
Provides a 1 minute Off delay at 100% of the cooling demand
airflow.
Speed Selection DIP Switches
Cool
Selection
Switches
Adjust
Selection
Switches
Profile
Selection
Switches
Heat
Selection
Switches
Tap
1
2
3
4
5
6
7
8
A
Off
Off
Off
Off
Off
Off
Off
Off
B
On
Off
On
Off
On
Off
On
Off
C
Off
On
Off
On
Off
On
Off
On
D
On
On
On
On
On
On
On
On
Switch Bank: S3
DIP Switch Number
Cooling Tap
1
2
A
Off
Off
B
On
Off
C
Off
On
D*
On
On
*Indicates factory setting
Switch Bank: S3
DIP Switch Number
Adjust Tap
3
4
Normal*
Off
Off
+10% Adjust
On
Off
-10% Adjust
Off
On
Normal
On
On
*Indicates factory setting
DIP Switch
Number
Ramping Profile Tap
5
6
A*
Off
Off
B
On
Off
C
Off
On
D
On
On
* Indicates factory setting
Off
100% CFM
Cooling
Demand
100% CFM
1 min
Off
Off
Off
50% CFM
100% CFM
100% CFM
1 min
Cooling Demand
¹⁄₂
min
82% CFM
100% CFM
100% CFM
1 min
Cooling Demand
7
¹⁄₂
min
Off
Off
