Evaporator Fan Matrix; Operation; Maintenance - Delfield 6100XL Service, Installation And Care Manual

Operation, continued
Freezer:
Whenever the freezer is plugged in, and the control has
completed initializing including the initial defrost cycle (also see
Electronic Temperature Control Operation, on this page). The
digital therostat will display box temperature. The temperature
control will cycle the compressor, evaporator fan motor and
condenser fan motor to maintain box temperature at the control
setting. See evaporator fan matrix for more information.
Freezer Automatic Defrost
The control also monitors compressor total running time
and will enter a defrost cycle after total compressor running
time is greater than 4-hours since the last defrost cycle OR
if evaporator coil temperature drops below -30˚F (-34°C)
(indicating excessive frost on the coil).
Freezer Manual Defrost
If a manual defrost is desired, simply unplug the unit for several
seconds, then plug unit back in. This will cause the control to
re-initialize and then enter a defrost cycle.
When the control enters the defrost mode, it switches off the

Evaporator Fan Matrix

Evap Fan On
Refrigerator
Freezer

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 Delrite® ABS 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
Delfield
™
®
Cooling Cycle
Compressor On
Evap Fan Off
X
X
For customer service, call (800) 733-8829, (800) 733-8821, Fax (888) 779-2040, www.delfield.com
6000XL Series Service and Installation Manual
evaporator fan motor, compressor and condenser fan motor,
and switches on the defrost heater to warm the evaporator
coil. Thereby melting all frost accumulated during the previous
refrigeration cycle. The digital temperature display will now read
dEF. The control will continue the defrost cycle for a MINIMUM
of 8 minutes and a MAXIMUM of 30 minutes depending on the
amount of frost accumulated on the evaporator coil.
After the defrost cycle is complete, the control returns to a normal
refrigeration cycle, however the evaporator fan motor will not
switch on for 2 minutes AFTER the compressor and condenser
fan motor have begun operating.
display will continue to read dEF until the evaporator has
returned to normal freezing temperatures (up to 30 minutes).
Service Alert
During normal operation the evaporator fan may cycle
and/or pulse independently of the compressor. Consult
the service manual or contact Technical Support at
1-800-733-8829 if you are unsure of the proper function.
Compressor Off
Evap Fan On Evap Fan Off
Cycles On 3-Min, Off 3-Min
X
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.
The digital temperature
Defrost Cycle
Compressor Off
Evap Fan On Evap Fan Off
X
X
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