User guide

Dewpoint Troubleshooting
Under normal operating conditions, the dryer will produce dewpoints in the range
of -40 to -20° F {-40 to -29° C}. However, you may experience situations that pro-
duce undesirable results.
Problem
Dryer not producing desired
dewpoint.
Possible cause
Low regeneration air flow.
Return air temperature exceeds 125°F
{52°C}. (The return air temperature on
W1600-5000 dryers is measured at the
inlet to the desiccant wheel. On W1600-
5000 dryers designed prior to August
2007, the return air temperature will be
measured at the inlet to the process
blower.)
Regeneration temperature is below nor-
mal setting.
Leaks in process lines.
Contaminated desiccant due to off-
gassing, too long of a residence time or
drying temperature is too high for the
grade of material being processed.
Analog option board/sensor malfunction
Solution
Check regeneration filter and clean
and/or replace as necessary.
Reduce the temperature of the cooling
water or increase the flow.
Connect water to the aftercooler/inter-
cooler if not already connected.
Check for adequate water temperature.
Water temperature should be approxi-
mately 85°F {29°C}.
Check amperage of regeneration heaters.
Replace heaters if necessary.
Check all hoses, gaskets, doors, loaders
or other potential areas where leakage
may occur. Replace any defective hoses
or gaskets.
Verify proper drying temperatures and
residence times. If off-gassing is a con-
dition of the material being processed,
contact Conair Parts at [phone]
for the addition of a volatile trap.
Verify dryer dewpoint readings with a
calibrated portable dewpoint meter.
Replace analog option board or sensor.
WARNING: Any electrical
checks should be performed by
a qualified electrician.
Troubleshooting l 6-17
6
Troubleshooting