Dirty Filter Switch Adjustment; Figure 29 Dirty Filter Switch And Dirty Filter Indicator Light/Reset Switch - Bard W42HC-A Installation Instructions Manual

characteristics. See Dirty Filter Switch Adjustment
for instructions on how to make proper switch
adjustments.
3. Re-install upper front panel.

Dirty Filter Switch Adjustment

1. Apply power to the unit.
2. Turn the unit indoor blower on (energize R-G on
low voltage terminal board).
3. With air filters installed and switch initially set
at 0.4" W.C. (see Step 2 under Dirty Filter
Dirty Filter Switch
Manual 2100-711F
Page 38 of 45
Dirty Filter Switch and Dirty Filter Indicator Light/Reset Switch
Switch), begin restricting the air filter of the unit
using a piece of cardboard under the filters until
the switch trips and the light comes on. If the
filter is restricted by 75% (or desired restriction
amount), skip to Step 6.
4. If switch setting adjustment is required,
disconnect power to the unit. Remove the upper
front panel and the cover on the airflow switch so
that adjustment can be made. If the switch tripped
before 75% restriction was reached, turn the knob
slightly clockwise. If the switch tripped after 75%,
turn the knob counter-clockwise (see Figure 30).
FIGURE 29
Dirty Filter Indicator Light
and Reset Swtitch