Energenics MLF-4545 - Manual (Page 30)

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MAINTENANCE REQUIREMENTS
The frequency of your maintenance requirements depends upon the number of
hours of operation and upon variances in your product output. For a single-shift
operation, without special problems, the frequency recommended below should
suffice. You should set your own schedule based on your experience.
1. WEEKLY
Visually inspect the filter inside and outside, its controls and their operation.
At time of such inspection, note and correct any discrepancies from normal
operation.
2. MONTHLY
Check the static pressure. Disconnect the lower pressure hose, and then use
a magnehelic gauge, manometer, or U-tube to measure and record the
resistance. This will show the pattern of operation of your system. If
pressure exceeds 1 inch W.C., insure the rotor is correctly turning and
cleaning the screen.
Watch the air pressure gauge on the filter. Record the drop in pressure during
the blow down cycle. A normal pressure is from 100psi at the start to 80psi after
six seconds. The minimum pressure is 80psi. Any less will not reliably clean the
screen. If the pressure were to fall from 100psi to 40psi, the air supply is
inadequate or obstructed.
3. QUARTERLY
On filters using fire protection control, carefully test the Fenwall fire sensor
accessed through the inspection door. First disconnect the initiator/solenoid
leads from the panel and connect a 24 VDC bulb to initiator terminals in the
control unit. Heat the Fenwell fire sensor with a heat lamp or other
convenient source. When the bulb in the control unit changes state, remove
heat source and allow Fenwell fire sensor to cool. Reset control unit. Test
lamp must change state and stay changed after system is reset. Do not
reconnect initiator/solenoid leads until all Fenwell fire sensors have cooled
below set point as indicated by test lamp.
FILTER SCREEN MAINTENANCE
Chemicals present in the laundry uniforms, shop towels or other linen may
eventually clog the filter screen. When this occurs, try the following:
1. Spray with an engine degreaser like GUNK. Allow soaking per the
instructions for cleaning an auto engine. Spray clean with water.
2. Operate one dryer without a load to blow hot air through the filter to dry it.
3. Restart the dryer. Operation should be perfectly normal. It should not be
necessary to replace the screen unless it is punctured.