COPYRIGHT
DRI-EAZ PRODUCTS, INC. 1996
7
The coils are the means by which heat is transferred
to and from the air stream to the refrigeration circuit.
The coils are critically engineered in order that correct
transference takes place so the pressures within the
refrigeration circuit remain within operating limits.
The air passing through the DrizAir 120 dehumi-
difier may be carrying considerable quantities of dust,
lint and fungus spores. Even using a filter, the coils
pick up dirt and their heat transferring properties de-
crease, resulting in reduced water extraction and undue
pressure on the components.
If the unit is operating in a dusty environment both
the filter and coils will need to be cleaned more fre-
quently. For optimum efficiency, a maintenance sche-
dule should be set up for checking the coils and the
filter at regular intervals. Clean as is necessary.
Cleaning the Filter
Remove the filter from the filter shroud by remov-
ing the screw which attaches the filter shroud to the
housing. Lift bottom of filter shroud up and away from
back panel. To clean the filter, use a light vacuum or
wash with water and mild detergent. Spray directly
against the foam in the direction of the air flow. Begin
at the top of the filter and work down. Allow the filter
to drain before reinstalling.
Cleaning the Coils
The first step in cleaning the two coils is directing
compressed air, from both sides, through the coils.
Ideally, both coils should be dry and the operation be
completed outside (due to the dust that is created). Af-
ter blowing out loose contamination, a wet cleaning
process may be used.
A thorough cleaning of the evaporator coil can be
performed with an aluminum evaporator coil cleaner
available from a refrigeration service or supply outlet.
Follow the product directions carefully.
If you flush the coil, do not permit water to enter
the electrical compartment. Use a squirt bottle or a sy-
ringe so that you can control the water. Do not turn a
hose on the coil!
After cleaning the coils, ensure that the drain tray,
and drain hose are completely free of dirt. Clean the
front grill with a vacuum cleaner and brush attachment.
Danger
Do not under any circumstances remove the round
grounding plug from the cord. To do so will increase
the risk of personal injury, shock or fire.
Electrical Wiring & Cord
Inspect the power cord periodically to ensure insu-
lation is in good condition. Remove the dehumidifier
cover and control panel plate and ensure that all wires
are secured away from the fan blade. Inspect connec-
tions at the terminal block for good contact. Inspect the
wiring for abrasions, nicks or cuts. Repair or replace
the electric cord or wiring as needed. Connections that
are loose will heat up and show discoloration as a re-
sult.
Fan Motor
Carefully clean the fan motor and blade each time
you have the cover off for cleaning the coils.
Drain Hoses
Ensure that the drain hoses are not kinked and in
good condition before the DrizAir 120 leaves for the
job site and again after the installation is completed.
Avoid wrapping drain hose too tightly around hose
wrap to avoid kinking.
Peristaltic Pump
The pump-out system consists of the drip tray, tube
fittings, pump tube and the peristaltic pump. This sys-
tem should be inspected and maintained regularly to
ensure effective operation. Failure to change the tube
and properly maintain the pump will result in water
leakage, flooding of floors and may cause electrical
problems.
The pump operates by compressing a tube within a
chamber. The pump tube is compressed by rollers
which "squeeze" the condensate water through the sys-
tem. The compressive parts, the tube and rollers, are
subject to wear and can be replaced.
Maximum pump tube life can reach over 1,000
hours but a 500 hour inspection interval and tube re-
placement is strongly recommended. The parts to in-
spect are the pump body, the drive shaft, the rollers and
the tube.
Body:
The cover and case should be examined for
cracks or other indications of structural failure. The
chamber should be examined for residue. As rollers
wear, a black powder (nylon dust) is deposited in the
pumping chamber.
Shaft:
The pump drive shaft should be checked for
"side play". With the tube removed, the roller carriage
should not move side to side more than one 1/16th of
an inch (0.2 cm).
Rollers:
The pump rollers turn on steel shafts. Rollers
must fit snugly on the shaft and spin freely. A loose
