Milk, Ice Cream & Milk & Ice Cream Dispensers Service and Installation Manual
For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delfield.com
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Milk, Ice Cream & Milk & Ice Cream Dispensers Service and Installation Manual
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For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delfield.com
Cleaning the unit
The interior and exterior can be cleaned using soap and
warm water. If this is not sufficient, try ammonia and water
or a non-abrasive liquid cleaner.
The lid and lid openings should be cleaned with a sponge
and mild soap solution on a daily basis to maintain their
ability to seal.
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.
Do not use a sharp tool or knife to scrape any
gaskets as this may tear the gasket and ruin its
ability to seal.
Do not use full strength degreasing agents on
the gaskets as they could cause the gasket to
crack and become brittle.
The inside wall of these units house the
evaporator coil (cooling coil). Never use a
sharp object to remove frost or ice as this may
cause the unit to lose its freon charge and will
void all warranties.
Cleaning the NLFAC milk dispensers
The following special instructions apply to the model NLFAC
dispenser only. After cleaning the interior and exterior as
described above, be sure to return the milk case loading
tray to the bottom of the unit. The load tray is required
not only for easy self-locating of milk cases, but it also
ensures proper air flow through the evaporator coil for the
air curtain.
Any restriction to the air flow path, including
leaving the milk case load tray out of the
cabinet, will result in the voiding of your
warranties.
A drain is supplied to simplify cleaning of the interior.
Open the clamp used to close off the drain tube. Drain
accumulated liquid from the cabinet. Be sure to re-clamp
the tubing before resuming operation of the NLFAC unit.
Honeycomb Cleaning Procedure
Remove the honeycomb material from the equipment.
Soak in fresh hot dishwater for five minutes. Rinse by
spraying soap off with warm water, directing the spray into
the holes. Repeat rinsing steps until material is visibly
clean. Soak in sanitizing solution for five minutes. Replace
into equipment.
Defrosting
If there is 3/8” accumulation of ice formation on the interior
wall, the unit must be turned off to defrost.
Cleaning the condenser
To maintain peak refrigeration performance, the
condenser coil fins must be cleaned of dust,
grease and food particles every 60 days.
If conditions are such that the condenser is totally blocked in
two months, the frequency of cleaning should be increased.
The condenser can be cleaned with a stiff brush or vacuum
cleaner. Using high pressure such as compressed air is
recommended to thoroughly clean the coil.
Failure to follow the recommended methods and
frequency of condenser coil cleaning will result
in reduced refrigeration efficiency and possible
damage to the equipment. It may also invalidate
your warranties.
Low pressure control settings
The factory recommended low pressure control settings
for using HFC-134a refrigerant are 30 psig cut-in with a 20
psig differential. For units using HFC-404A refrigerant, the
pressure control settings are 30 psig cut-in with a 25 psig
differential.
The temperature is controlled by an adjustable pressure
control located in the machine compartment. An adjustable
control has the word
COLDER
near the knob, with an arrow
to indicate the adjustment direction. These controls are
field adjustable and do not require a service agent. If you
have any questions, feel free to contact the Delfield Service
Department.
In attempting to adjust the pressure control, you can
do damage to your unit by accidentally adjusting the
differential. Please make small incremental adjustments
if a temperature adjustment is necessary, please contact
the service department at Delfield (800) 733-8829 #1, or
your local
service agent.
Delfield is not
responsible
for charges
incurred
while having
the pressure
control
adjusted.
MAINTENANCE