18600 and CTP-NB Series Service and Installation Manual
9
Product should be loaded into the unit with care.
Failure to heed these recommendations could result in
damage to the interior of the cabinet or the blower coil.
This unit is equipped with two ON/OFF switches located behind the
louvered machine compartment panel. The unit’s com pres sor and all
evaporator fans will begin op er at ing when the main power switch is
turned to the
ON
position. Tem per a ture ranges for the base are 36°F
to 40°F (2°C to 4°C).
The switch labeled rail is for the raised rail. The rail switch is
accessible through a 1.5” (4cm) diameter hole in the louvered panel.
Turning this switch to the
ON
position will activate the refrigeration
for the rail. Temperature ranges for the raised rail are 33°F to 41°F
(1°C to 5°C).
Product located in the rail must be removed at the end
of day. This allows you to turn the rail off at night to
save energy and the rail will have time to defrost as
needed.
A minimum of one hour of off time per day with the pans removed
from the rail is required to properly defrost the rail.
The power must be turned to OFF and the unit
disconnected from the power source whenever
performing service or maintenance functions.
Never operate the unit without the louvered panel in
place!
Rails are not designed to cool warm food products. Items should be
placed in the rail cooled at least to the desired holding temperature,
if not slightly colder. Fill pan to 2.0” (5cm) below top of cold pan.
In some applications, a gradual warming of product may occur,
particularly at the exposed top of the products. Stirring or rotation of
the product is necessary to maintain overall temperature.
Warming of food product can occur very quickly outside of the rail.
When loading or rotating the product, avoid leaving food items in a
non-refrigerated location for any length of time to prevent warming
or spoilage. To ensure product quality product must be rotated
every four hours. Always place covers on pans when not serving to
maintain temperatures.
Air from air vents can affect the temperature in the cold pans. Add
deflectors to vents to redirect airflow.
All R404A models have a high pressure limiting device. Under
severe overloading conditions, or in the event of a condenser fan
failure or a plugged or blocked condenser, this device may shut
down the refrigeration system. This device will automatically reset,
but determining the cause of the high pressure condition should be
investigated by a qualified refrigeration technician.
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
DANGER
After turning the
ON/OFF
switch to
ON
, the units compressor will
begin operating. Delfield refrigerated bases are designed to maintain
an operational temperature of 36°F to 40°F (2°C to 4°C).
Product should be loaded into the unit with care.
Failure to heed these recommendations could result in
damage to the interior of the cabinet or 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
.
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
Operation: 18600PTB & PTL Series
Operation: 18600BUC & BST Series
CAUTION
CAUTION
