6000XL Series Service and Installation Manual
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6
Delfield
™
®
MAINTENANCE
The thermostat must be turned to OFF and
the unit disconnected from the power source
whenever performing service, maintenance
functions or cleaning the refrigerated area.
Refrigerators and Freezers
The interior and exterior can be cleaned using soap and warm
water. If this isn’t sufficient, try ammonia and water or a
nonabrasive liquid cleaner. When cleaning the exterior, always
rub with the “grain” of the stainless steel to avoid marring the
finish.
Do not use an abrasive cleaner because it will scratch the
stainless steel and plastic and can damage the breaker strips
and gaskets.
Cleaning the Condenser Coil
The condenser coil requires regular cleaning, recommended
is every 90 days. In some instances though you may find
that there is 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 a spray with the de-
greasing agent and then blown through with compressed air.
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 failures. 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
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 at least 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.
Stainless Steel Care and Cleaning
To prevent discoloration or rust on stainless steel several
important steps need to be taken. First, we need to understand
the properties of stainless steel. 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 is still stainless. If the
film is broken or contaminated, outside elements can begin to
breakdown the steel and begin to form rust of discoloration.
Proper cleaning of stainless steel requires soft cloths or plastic
scouring pads.
NEVER USE STEEL PADS, WIRE BRUSHES OR
SCRAPERS!
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 stainless steel can be done with soap and
water. Extreme stains or grease should be cleaned with a
non-abrasive cleaner and plastic scrub pad. It is always good
to rub with the grain of the steel. 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 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 the stainless steel surfaces of ALL food
products. Common items include, tomatoes,
peppers and other vegetables.
