49
Model R280
Refrigeration System
General Operation
The R280 employs a cold wall system. Through the
refrigeration process, heat is transferred to the
condensing unit at the bottom of the cabinet, where it is
expelled to the surrounding outside air. It is extremely
important to allow unrestricted airflow for the
refrigeration process to function properly.
A minimum of 0.5 in. (13 mm) clearance on both sides
and 2 in. (50 mm) behind the Dispenser is
recommended.
The temperature control for the R280 is capable of
detecting conditions that fall outside of normal operation.
In such cases, the controller will generate and display an
error to warn the operator that an abnormal condition
exists and corrective action may need to be taken. Some
error conditions are easily fixed, while others may require
the attention of a qualified service technician.
See Error Detection on page 21
for a complete list of
error codes and a troubleshooting guide.
CAUTION!
Only trained and/or qualified
personnel, licensed in refrigeration, should perform
service to the refrigeration systems of this equipment.
Failure to comply may result in personal injury from
moving parts or damage to the machine.
The set point temperature is the temperature the
refrigeration system will attempt to maintain inside the
cabinet. The default set point temperature is 0°F (-18°C),
and has a range of -5°F to 5°F (-20°C to -15°C). The set
point can be changed using the Manager Menu. See
Manager Function Menu Structure (U3) on page 17
Cabinet temperature is displayed on the operator panel
during normal operation
Defrost
Because the Dispenser employs a cold wall design, it will
be necessary to manually defrost the cabinet daily. First,
remove the product. Turn the ON/OFF switch off. Open
the cabinet door and allow 1 hour to defrost
CAUTION!
Never use a sharp object to remove
frost buildup. Never drill or otherwise puncture cabinet
walls or top. Failure to follow this instruction may result in
damage to the Dispenser.
Wipe the cabinet dry when defrosting is complete.
Required Maintenance
Daily:
Shut off, clean, defrost, and inspect cabinet. (See
Disassembly, Defrost, and Cleaning on page 8.)
Monthly:
Clean and inspect the condenser filter. Replace as
necessary.
Every 3 Months:
Or as needed as determined by environmental
conditions.
Inspect the door gasket for proper sealing. Adjust
door hinges and/or replace gasket if needed.
Clean the condenser coils, located behind the
condenser filter.
CAUTION!
Failure to keep the condenser filter
and coil clean and clear of obstructions could result in
temperature loss and damage to the compressor and
may void the warranty.
