RS COMPACT FREEZE TUNNEL, Руководство по эксплуатации и обслуживанию

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OPERATION & MAINTENANCE MANUAL
CompactFreezer
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Freezer Start ‐ Up Procedure:
1. Follow the Pre‐Startup Checklist in Section 6.1 prior to start‐up every day.
2. Open the manual shut‐off valve (main valve) of the LN
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‐supply at the storage tank if it is not
already open.
3. Close and latch all module doors. Check for loose tools or parts on conveyors.
4. START the exhaust blowers. Check for proper operation. Adjust the exhaust flow if required.
5. Before starting the freezer, make sure the out feed conveyor belt is running so there is not a
pile‐up at the exit end.
6. START the conveyor drive. Adjust to proper speed.
7. START the Fan Motor. Check to see that all are operating.
8. Turn on the instrument power, set temperature controller.
9. Check that the conveyor belt(s) of the Cabinet Freezer is running. Check if the conveyor belt is
running at the desired speed, by checking the residence time. The speed of the in‐feed and
discharge conveyors should be matched to assure a smooth product transfer.
10. Check that the liquid nitrogen is injecting into the freezer. This starts the freezer cool‐down
process.
11. Check for leaks in the nitrogen piping and fittings.
12. Adjust the flow rate of the exhaust fan to make sure the spillage of nitrogen vapor from both
ends of the freezer is kept to the required minimum. Note: A correct vapor balance is essential
for safe freezer operation. If entry or exit conveyors are blocking the vapor, remove the stainless
steel floor plate above the exhaust trough
13. If large amounts of nitrogen vapor are blown out of the freezer, stop the unit immediately by
pressing any
E‐stop button on the machine. Investigate the problem and start the procedure
from the very beginning or call for assistance before proceeding.
14. Start loading food product. Adjust the flow rate of the exhaust system to ensure only the
required minimum of nitrogen vapor is coming out of freezer (correct vapor balance).
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