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Addendum l AD-11
Blower Troubleshooting
In the event that trouble is experienced in the field, the following Troubleshooting
Table lists the most common blower difficulties. These points should be checked
before contacting Conair Customer Service.
Problem
The blower does not meet
capacity or pressure ratings.
Excessive vibration and/or
noise.
Possible cause
Total resistance of system is higher than
anticipated.
Dampers or variable inlet vanes are not
properly adjusted.
Poor fan inlet or outlet conditions.
Air leaks in system.
Damaged wheel.
Incorrect direction or rotation.
Unstable foundation, fan bolted to an
uneven foundation, not shimmed or grout-
ed properly.
Foreign material in fan causing unbal-
ance.
Solution
Reduce the system restrictions by short-
ening the hoses, reducing the number of
turns, and/or increasing the plenum size.
Open the damper to increase the flow;
close the damper to decrease flow.
Clear all obstructions from the air inlet
and outlet.
If an inlet filter is used, clean or replace
the filter as needed.
Seal all possible air leaks in the system.
Replace the damaged wheel.
Reverse the electrical connections at the
motor.
Reinstall the unit following the installa-
tion instructions detailed in the
"Installation Instructions" on page AD-2.
Clean the fan and fan housing.
(continued)