Vogt Tube-Ice HFO10, Service Manual

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5-2
Shutdown Procedure
The red Stop button should only be used for emergency shutdown.
For normal shutdown, use the Clean/Off/Ice selector switch and follow the steps below:
1. Set the Clean/Off/Ice selector switch to the Off position. Do not use the machine disconnect to stop the
machine. If the disconnect is used, the crankcase heater is de-energized, and liquid refrigerant migrates
to the compressor.
2. During a freeze period, the machine will continue to run.
3. At the completion of the freeze period, the machine will harvest and stop. The completion of a cycle
(1 freeze plus 1 harvest) ensures that all ice is removed from the freezer to prevent refreeze when the
machine is restarted.
4. During a harvest period, the machine will complete the harvest and stop.
Start-Up and Shutdown Tips
•
If the operation of your machine is not controlled by a timer, bin level control, or some other
mechanism to automatically start and stop ice production, you should use only the
Clean/Off/Ice
selector switch to start and stop the machine.
•
By turning the Clean/Off/Ice selector switch to Off , the machine will stop after the next harvest period.
•
Do not use the Stop button or the machine disconnect for normal shutdown of the machine.
•
Disconnect the machine only in an emergency or for safety when performing certain service or repairs to
the machine. The compressor crankcase heater is de-energized when the machine is shut down.
•
The Start button can be used to initiate a harvest period. When it is pushed during a freeze period, it will
immediately initiate a harvest period
Ice Quality
Your HFO10 has been set up at the factory to produce the finest Tube-Ice® possible. The ice produced in the
freezer should have a small hole in the middle of each tube to avoid permanently damaging the freezer. Table 4
shows recommended hole sizes for determining ice quality. For further information, refer to Chapter 9.
Table 4: Average Hole Size in Tube-Ice®
Tube Size in. (mm) 1 (25) 1-1/4 (32) 1-1/2 (38)
Hole Size in. (mm)
1/16 – 1/8
(1.6 – 3.2)
1/8 – 3/16
(3.2 – 4.8)
1/4 – 3/8
(6.4 – 9.5)
Adding Refrigerant
Be sure to follow all local and federal regulations regarding the handling of refrigerants and their
illegal emission into the atmosphere.
Check the refrigerant level after the machine has operated for a few cycles. It should be slightly above the
minimum operating level, as indicated on the label on the receiver, a few minutes before the start of a thawing
period.
If the level is low at this time, sufficient refrigerant should be added to the system to raise the level above this
point.
Note: Refrigerant can only be added during the freeze period.