COPYRIGHT © 1999 2000 DRI EAZ PRODUCTS INC
8
5. If you cannot clear the rotor using the vacuum, you
may use compressed air to help the process. Do this care-
fully so that you do not damage the rotor. The compressed
air should be dry and free of oil. Do not use a pressure
higher than 30 PSIG. Use compressed air on one side of the
rotor and the vacuum on the other side. Do not hold the
compressed air closer than 12 inches from the face of the
rotor. Do not wash the rotor with any solvent. Improper
cleaning can permanently damage the rotor.
6. If the rotor is still is still plugged, please call the Dri-
Eaz Service Department.
Maintenance Quick Reference Summary
Air Filter
•
Inspect and clean as necessary
Reactivation Outlet Temperature
•
Should be approximately 30°F (17°C) higher than the
ambient air temperature in the room.
Seals
•
Check for excessive wear
Rotor
•
Check for rotational binding
•
Check that rotor is not plugged with dirt
TROUBLESHOOTING
Any troubleshooting procedure requiring that the unit be
plugged in to a power source while the cover is removed
should be done only by a qualified service technician.
Danger!
Do not work with the electrical parts unless you are a quali-
fied service technician.
No Indicator Lights (DriTec 325 only)
Check the AC power distribution
. Check the power
cord into the unit and check the two "Main" 30A fuses in the
DriTec Desiccant unit.
"BLOWER ON" Light Is Off (DriTec 325 only)
1.
Check the fuses
. If the blower light is off with the
power switch in the "On" position, a fuse may have
blown. Do not replace the fuse until you have checked
to determine what caused the fault. Always use the same
type and rating fuses.
2.
Check the heating elements
for electrical short (see
below).
3.
Check the line voltage.
A fuse may have blown if the
AC line voltage varies considerably from the specified
230 volt AC. The line voltage should be 230 volts ±
10%.
4.
Check the blower.
Turn off and unplug the DriTec
Desiccant. Check to make sure that the blower wheel
can turn freely. Check the motor for short circuit or
open circuit or for any mechanical problem that might
keep it from turning freely.
5.
Restarting the unit.
Do not attempt to restart the unit
until it is determined what caused the fault condition
and corrective action is taken.
"HEATER ON" Light Is Off (DriTec 325 only)
1.
Check the fuses
. If the heater light is off with the power
switch in the "On" position, a fuse may have blown. Do
not replace the fuse until you have checked to determine
what caused the fault. Always use the same type and
rating fuses.
2.
Check the reactivation air stream.
The most common
cause for overheating is a blockage in the reactivation
air stream.
3.
Check the line voltage.
The heating elements may also
overheat if the AC line voltage rises much above the
specified 230 volt AC. The line voltage should be 230
volts ± 10%.
4.
Check blower.
A jammed or slow turning blower wheel
can lead to overheating. Turn off and unplug the DriTec
Desiccant. Check to make sure that the blower wheel
can turn freely. Check the motor for short circuit or
open circuit or for any mechanical problem that might
keep it from turning freely.
5.
Restarting the unit.
Do not attempt to restart the unit
until it is determined what caused the fault condition
and corrective action is taken.
Reactivation Outlet Temperature Too Low
1.
Check the reactivation outlet air.
The air at the outlet
for the reactivation air should be about 30°F (17°C)
higher than the temperature of the room air. This meas-
Fuse Diagram for DriTec 325 only.
The DriTec 150 does not include a fuse.
Warning
Replacement fuses should have the same amperage,
maximum voltage, and interrupt capacity ratings.
