Indoor Blower Operation; Indoor Blower Performance - Bard WG Series Installation Instructions Manual

33. INDOOR BLOWER OPERATION

The indoor blower motor is a constant CFM variable
speed direct drive motor. The motor is programmed
to respond to individual thermostatic inputs that
will determine the speed/airflow at which the motor
operates. The motor software maintains the rated
airflow across the range of allowable static whether the
system is ducted or free blow. It will also maintain the
Rated Max
Model
ESP ESP
WG3S2 0.15 0.50
WG4S2 0.20 0.50
WG5S2 0.20 0.50
Motor will deliver consistent CFM through voltage supply range with no deterioration

(197-253V for 230/208V models, 414-506V for 460V models).
Continuous CFM is the total air being circulated during continuous (manual) fan mode.

Will occur automatically with a call for "Y1" signal from thermostat.

Will occur automatically with a call for "Y2" signal from thermostat.

Reduced cooling airflow when pink wire is removed from "COOL" tap on furnace control board and placed on

"UNUSED" tap.
Will occur automatically with a call for "W" signal from thermostat.

Constant CFM of variable speed motor should maintain mid-rise temperature differential through range of allowable

static.
Furnace Control Board and Blower Control
Indoor Blower Performance 
Rated
Continuous
1st Stage 2nd Stage
CFM
Cooling

CFM

800 800
825 1100
850 1300
FIGURE 18
temperature rise across the gas heat exchanger at the
mid-point of the allowable rise range automatically.
There are not adjustments that can be made in the
field to adjust the airflows for any mode of operation.
For duct-free applications where lower operating sound
is desired, remove pink wire from "COOL" tap and
move to "Unused" tap.
TABLE 9
Rated Reduced
2nd Stage
Cooling Cooling
BTU Input
CFM CFM
 
1100 1000
1500 1350
1700 1500
Heating CFM
50,000 75,000 100,000
BTU Input BTU Input
1020 1250
1020 1250
1020 1250
 
125,000
BTU Input
1365 1410
1365 1410
1365 1410
Manual 2100-587J
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