Maintenance; Stainless Care And Cleaning; Condenser Coil Cleaning; Gasket - Delfield 4400 Series Original Instructions Manual

Delfield

Maintenance

The thermostat must be turned to OFF and the
cabinet disconnected from the power source
whenever performing service, maintenance
CAUTION
functions or cleaning the refrigerated area.
Never hose down interior or exterior of units with
water. This will void the warranty. Wipe interior
dry of any water accumulation.
CAUTION
Stainless Steel Care And Cleaning
To prevent discoloration or rust on stainless steel several
important steps need to be taken. First, the properties of
stainless steel need to be understood. Stainless steel contains
70-80% iron which will rust. It also contains 12-30% chromium
which forms an invisible passive film over the steels surface
which acts as a shield against corrosion. As long as the
protective layer is intact, the metal will not corrode and is
still stainless. If the film is broken or contaminated, outside
elements can begin to breakdown the steel and begin to
form rust or other discoloration.
NEVER USE STEEL PADS, WIRE BRUSHES OR
SCRAPERS!
CAUTION
Do not use an abrasive cleaner because it will scratch the
stainless steel and plastic and can damage gaskets. Proper
cleaning of stainless steel requires soft cloths or plastic
scouring pads.
Cleaning solutions need to be alkaline based or non-chloride
cleaners. Any cleaner containing chlorides will damage
the protective film of the stainless steel. Chlorides are also
commonly found in hard water, salts and household and
industrial cleaners. If cleaners containing chlorides are used, be
sure to rinse repeatedly and dry thoroughly upon completion.
Routine cleaning of the interior and exterior can be done
with soap and warm water. Extreme stains or grease should
be cleaned with a non-abrasive cleaner and plastic scrub
pad. When cleaning the exterior, always rub with the grain
of the stainless steel to avoid marring the finish. There are
also stainless steel cleaners available which can restore and
preserve the finish of the steels protective layer.
Early signs of stainless steel breakdown can consist of small
pits and cracks. If this has begun, clean thoroughly and start
to apply stainless steel cleaners in an attempt to restore the
passivity of the steel.
Never use an acid based cleaning solution! Many
food products have an acidic content which
can deteriorate the finish. Be sure to clean ALL
CAUTION
food products from any stainless steel surface.
Common items include, tomatoes, peppers and
other vegetables.
18
CLEANING THE CONDENSER COIL
The condenser coil requires regular cleaning every 90 days
(recommended). In some instances you may find a large
amount of debris and dust or grease accumulated prior to the
90 day time frame. In these cases the condenser coil should
be cleaned every 30 days.
If the build up on the coil consists of only light dust and debris
the condenser coil can be cleaned with a simple brush. Heavier
dust build up may require a vacuum or even compressed air
to blow through the condenser coil.
If heavy grease is present there are de-greasing agents available
for refrigeration use, and specifically for the condenser coils.
The condenser coil may require using a de-greasing agent
and then being blown through with compressed air. Follow
the de-greasing agent manufacturer's instructions.
Failure to maintain a clean condenser coil can initially cause
high temperatures and excessive run times. Continuous
operation with dirty or clogged condenser coils can result in
compressor failure. Neglecting the condenser coil cleaning
procedures will void any warranties associated with the
compressor or cost to replace the compressor.
Never use a high pressure water wash for this
cleaning procedure as water can damage the
electrical components located near or at the
CAUTION
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 every three
months. If conditions are such that the condenser is totally
blocked in three months, 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.
If your freezer seems to vibrate excessively when the
compressor is running, loosen (but do not remove) the bolts
on the compressor. Semi-hermetic models should be loosened
before operating.
Gasket Maintenance
Gaskets require regular cleaning to prevent mold and mildew
build up and also to maintain the elasticity of the gasket. Gasket
cleaning can be done with the use of warm soapy water. Avoid
full strength cleaning products on gaskets as this can cause
them to become brittle and prevent proper seals. Also, never
use sharp tools or knives to scrape or clean the gasket which
could possibly tear the gasket and rip the bellows.
Gaskets can easily be replaced and do not require the use of
tools or authorized service persons. The gaskets are "Dart"