F18 Series Service and Installation Manual
9
For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delfield.com
Refrigerator Operation
Power up the unit by turning
ON
the unit’s
ON/OFF
switch.
Delfield refrigerated bases are designed to maintain an
operational temperature of 36°F to 40°F (2°C to 4°C).
Temperature in the salad top and refrigerated rail opening is
33°F to 41°F (0°C to 5°C) with pans recessed 2” (5.1cm) on
a standard wrapped refrigerated rail or flush with the LiquiTec
option at 86°F (30°C) ambient room temperature.
Do not place hot pans on/against the blue ABS liner.
Do not throw items into the storage area. Failure
to heed these recommendations could result in
damage to the interior of the cabinet or to the
blower coil.
Overloading the storage area, restricting the air
flow, and continuous opening and closing of the
doors and drawers will hamper the units ability to
maintain operational temperature.
Refrigerated rail units
Product in the rail should be removed to the refrigerated base
at the end of the day. This allows you to turn the rail off at night
to save energy and the rail will have time to defrost as needed.
It also helps maintain product quality. The standard wrapped
refrigerated units are controlled by the pressure control which
is set to maintain the proper rail temperature. An on/off switch
is also provided for the rail and is required to be shut off at
night. The rail switch shuts off the rail only. With a LiquiTec rail
a thermostat is provided to maintain rail temperature as well as
the rail on/off switch. The LiquiTec rail is required to be shut
off at night as well to allow for defrosting. To ensure product
quality in the rail it is recommended that product be rotated
every four hours.
If adding any item to the unit, be sure to keep
in mind the location of the refrigeration lines on
wrapped rail units. A refrigeration leak in a rail
is extremely difficult and costly to repair. In some
cases it cannot be repaired at all.
Refrigerator Evaporator Fan Operation
When the refrigerator is initially powered up or immediately
following a power outage the unit will begin cooling after a 3-6
minute delay. During normal operation the evaporator fan pulses
independently of the compressor as dictated by the controller
as follows:
1. During the cooling mode, compressor and evaporator fan
run simultaneously.
2. During the compressor off mode, evaporator fan pulses
three minutes on and three minutes off.
3. During an actual defrost event other than the off-cycle
defrost, compressor stays off but the evaporator fan runs
continuously.
Cooling Cycle
Defrost Cycle
Compressor On
Compressor Off
Compressor Off
Evap Fan
On
Evap Fan
Off
Evap Fan
On
Evap Fan
Off
Evap Fan
On
Evap Fan
Off
X
Cycles On 3-Min, Off
3-Min
X
Freezer Operation
Power up the unit by turning
ON
the unit’s
ON/OFF
switch.
Delfield freezer bases are designed to maintain an operational
temperature of 0°F (-18°C).
Do not place hot pans on/against the blue ABS liner.
Do not throw items into the storage area. Failure
to heed these recommendations could result in
damage to the interior of the cabinet or to the
blower coil.
Overloading the storage area, restricting the air
flow, and continuous opening and closing of the
doors and drawers will hamper the units ability to
maintain operational temperature.
Freezer Evaporator Fan Operation
The evaporator fan(s) and condenser fan will cycle off and on with
the compressor to conserve energy. The temperature control will
cycle the compressor and condenser fan motor and evaporator
fan motor to maintain box temperature at the control setting.
Cooling Cycle
Defrost Cycle
All Freezers
Self-Contained
Freezers
Remote Freezers
Compressor
On
Compressor
Off
Compressor
On
Compressor
Off
Evap Fan On
Evap Fan Off
Evap Fan Off
Evap Fan Off
Freezer Defrost
Self-contained models use hot gas to defrost the evaporator coils.
Remote freezers use electric defrost.
