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Defrosting the Chamber
Each machine section will perform a defrost cycle for the evaporator automatically at regular time intervals set by the user.
Depending on how often the door is opened, it may be necessary to manually defrost the chamber interior periodically. More
frequent door openings create a greater need to defrost the chamber. To manually defrost the chamber:
Remove all product from the freezer.
1.
Turn the freezer off and disconnect power from both refrigeration systems.
2.
Open the doors and place towels on the chamber floor.
3.
Allow the frost and/or ice to melt and become loose. Place blowers in front of the chamber to speed up the process if
4.
necessary.
Remove all ice and water.
5.
Dry the chamber.
6.
7.
Clean the interior with a non-abrasive, non-chlorine detergent.
Rinse with clean water.
8.
Dry the chamber again.
9.
Connect the refrigeration systems to power and set the displays to AUTO.
10.
11.
Allow the freezer to run overnight before reloading the product.
Vacuum Relief Ports
Periodically check each vacuum relief port located on the inside of each exterior door. Keep the vacuum relief ports clean and
free of frost by wiping them with a soft cloth. The vacuum relief ports must be kept clear of ice and snow. Failure to do so will
result in a longer wait time before the door can be re-opened due to the vacuum created inside the chamber.
Extreme Cold Temp
Figure 40: Vacuum Relief Ports
ULC SERIES INSTRUCTION MANUAL
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