Model ULC Series
06012021ULC,Rev i
Page 50 of 54
Vacuum Relief Ports
Periodically check each vacuum relief ports located on the inside of each exterior door.
Keep the vacuum relief ports clean and frost free by wiping with a soft cloth. The vacuum
relief ports must be kept clear of ice/snow. Failure to keep the vacuum relief ports clean
will cause longer than normal wait time before door can be re-opened due to the vacuum
created by the contraction of the air that entered the chamber.
Evaporator Inspection
The evaporator should be inspected every twelve (12) months. This is a visual inspection.
Complete the following steps:
1. Turn off the freezer.
2. Unplug the evaporator fan power cable.
3. Remove the top of the evaporator cover by unlatching the four clamps holding the
evaporator cover in place. Using the handles installed, lift the evaporator cover from the
machine section.
4. Visually inspect blower wheel and check blower wheel balance via turning blower wheel
manually and checking for proper balance of blower wheel.
5. Inspect evaporator coil and clean as necessary by removing particles that are attached
to the fins with a vacuum cleaner.
6. Inspect the general area of evaporator coil for debris or any damage.
7. Re-install evaporator cover, ensuring that all ductwork is aligned with its mating piece.
8. Securely engage and close all four clamps.
