Delfield ST4427NP-6, Specifications, Installation, Operation & Maintenance Manual

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24 Part Number: 9295093A 02/21
Maintenance Section 4
Remove the clear rubber hose and the copper 90° pipe and
inspect/clean any debris. After cleaning, be sure to reinstall
the pipe and hose and firmly pack the black PurmaGum
back into place to not allow warm air into the unit. Be sure
to replace the clear rubber hose back into the condensate
drain pan down below making sure the hose does not kink or
hold water. Reinstall the rear panel.
CLEANING THE CONDENSER COIL
In order to maintain proper refrigeration performance, the
condenser fins must be cleaned of dust, dirt and grease
regularly. It is recommended that this be done monthly. If
conditions are such that the condenser is totally blocked
in a month, the frequency of cleaning should be increased.
Clean the condenser with a vacuum cleaner or stiff brush. If
extremely dirty, a commercially available condenser cleaner
may be required.
Failure to maintain a clean condenser coil can initially cause
high temperatures and excessive run times. Continuous
operation with a dirty or clogged condenser coil can result in
compressor failure. Neglecting the condenser coil cleaning
procedures will void any warranties associated with the
compressor and cost to replace the compressor.
DOORS/HINGES
Over time and with heavy-use doors, the hinges may become
loose. If this happens, tighten the screws that mount the
hinge brackets to the frame of the unit. Loose or sagging
doors can cause the hinges to pull out of the frame, which
may damage both the doors and the hinges. In some cases
this may require qualified service agents or maintenance
personnel to perform repairs.
Hinge Screws
Copper 90° W/
Rubber hose