Service manual

HEC-Series Service Manual
MAINTENANCE
10/21/01
7-1
7. Maintenance
Ice-making Section. The ice-making section of the Tube-Ice
®
machine should be cleaned at least
twice a year (more often if water conditions cause mineral build-up) using an approved food-grade ice
machine cleaner. The water pump is used to circulate the cleaner through the system by setting the
“Clean” push button switch to the “On” position (button in) and starting and stopping the pump by
this push button switch and the start button. For complete instructions, refer to the “Cleaning
Procedure” attached to the equipment and duplicated here.
Cleaning Procedure
1. Set “Ice” switch to “Off” position. If the machine is running, it will shut down on the completion
of the harvest period and partial pumpdown cycle. Remove the freezer cover to inspect and clean
the water distributors as necessary. Replace the freezer cover with the distributors installed.
2. Remove ice from storage area or cover opening to prevent ice contamination.
3. Set the “Selector” switch to “Cyl” position (dual ice type machines only).
4. Push the “Clean” button to the “On” position. The machine will begin a total pumpdown. After
total pumpdown, the compressor will stop and only the water pump will be running.
5. Push the “Clean” button to the “Off” position and the pump will stop.
6. Shut off the water supply and drain the water tank flushing loose scale in the process.
7. Close the water tank drain valve and fill tank with approximately six gallons of tap water. Warm
water can be used but should not exceed 115°F (46°C).
8. Add a measured portion of a food-grade ice machine cleaner (nickel safe preferred) to the water
tank in accordance with cleaner instructions and insert the plastic tubing and petcock valve
(discharge end) of the adjustable blowdown into the water tank and adjust the petcock to full
open.
9. Push the “Clean” button to the “On” position and push the “Start” button to run the pump only
and circulate cleaner solution. Clean until deposits are dissolved by changing solution as
necessary.
10. When the system is considered clean, stop the pump, drain the tank, turn on the water supply, and
flush the system thoroughly with clean water (at least twice) as necessary to remove chemical
residue.
11. Clean inside the ice storage area and remove any solution that may have entered during the
cleaning process. Remove cover from over the opening into the storage area.