OPERATION
Refrigerator Cycle
Refrigerators: During the refrigeration cycle, the evaporator fans will run continuously when doors are closed, and the
evaporator fans will stop when one or more doors are open. The door switch will activate the lights when opened.
1. Every 6 hours, the unit will turn off and allow the evaporator coil to defrost by the compressor stopping. The controller now
displays the defrost symbol. After 20 minutes of defrost, the unit will turn on again.
2. Anti-condensation heaters on door frames work in conjunction with the compressor.
3. Recommended holding temperature range: 36° to 41°F (2° to 5°C).
4. Comes factory set to 36°F (2°C).
Freezer Cycle
Freezers: During the freezer cycle, the evaporator fans will run continuously when doors are closed, and the evaporator
fans will stop when one or more doors are open. Fans will cycle off during a defrost period. The door switch will activate
the lights when opened.
1. Every 4 hours, the unit will turn off and the electric heater will turn on to defrost. The controller now displays the
defrost symbol. When the coil temperature reaches 54°F (12°C) or after 35 minutes of defrost, and after the drip
time delay of 5 minutes, the unit will turn on again.
2. Anti-condensation heaters on door frames work in conjunction with the compressor.
3. Recommended holding temperature range: -9° to 9°F (-23° to -13°C).
4. Comes factory set to -6°F (-21°C).
Power Switch:
The power switch is located on the front of the bottom panel. When the unit is on, the switch will glow green.
THERMOSTAT DESCRIPTIONS
Please refer to the additional pages “Digital controller installation and operating instructions”.
TIPS FOR PROPER OPERATION, CLEANING AND MAINTENANCE
1. The unit should be cleaned daily as well as being tested for the proper holding temperature by measuring the
content temperature and comparing it to the temperature displayed on the controller. They should be within
3°F of each other.
2. When cleaning the exterior surface always use a soft cloth or microfiber towel. If a stiff bristle brush, scouring pad
or scraper is used, the protective chromium oxide barrier will be penetrated allowing the appliance to show signs
of rust.
3. When cleaning the interior or exterior of the appliance always use a mild detergent solution or warm soapy water.
This won’t harm the plastic or metallic substances and will remove most residual surface dust and grime. If a
more aggressive cleaning is needed use a 3M Scotch Brite General Purpose Synthetic Fiber Green Scouring
Pad and a solution of Dawn and warm water or a stainless steel cleaner/polishing product.
4. Ensure your gaskets are making a good compression seal and aren’t torn or damaged as air entering the unit
can increase the appliance’s refrigeration system energy usage. In extreme cases, the temperature could fall
out of range. When changing a gasket, it is recommended that a dab of gasket adhesive be applied every 10 to
12 inches to help hold the gasket in position. This escaping air may cause surface condensation.
5. Do not pack the unit so full that air cannot circulate. The refrigerated air is discharged at the bottom rear of the
unit. It is important to allow for proper air flow from the top rear to the bottom of the unit.
6. Minimize the number of times the appliance door needs to be opened, as frequent access may preclude the
unit’s ability to maintain the proper temperature.
7. Use shelving with rear and side turn up rails to ensure proper air circulation is maintained as this is needed for
effective, efficient temperature regulation.
8. Never use an infrared thermometer to monitor the unit’s contents bulk temperature as they aren’t accurate for
this application. Use a NIST capable instrument and calibrate the thermometer at least 3 times a year using
an ice bath. Digital pocket thermometers may be off by as much as 1.8°F when measuring refrigerated
products.
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