Hoshizaki HR24B, Руководство по обслуживанию

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A. Refrigeration Circuit Service Information
WARNING
• Repairs requiring the refrigeration circuit to be opened must be performed by
properly trained and EPA-certified service personnel.
• Use an electronic leak detector or soap bubbles to check for leaks. Add a trace
of refrigerant to the system (if using an electronic leak detector), and then raise
the pressure using nitrogen gas (140 PSIG). Do not use R-290 as a mixture with
pressurized air for leak testing.
WARNING
• Repairs requiring the refrigeration circuit to be opened must be performed by
properly trained and EPA-certified service personnel.
• Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). Do not use R-600a as a mixture with
pressurized air for leak testing.
NOTICE
• Repairs requiring the refrigeration circuit to be opened must be performed by
properly trained and EPA-certified service personnel.
• Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). Do not use R-600a as a mixture with
pressurized air for leak testing.
Refrigerant leaks must be repaired as soon as they are discovered. If not, refrigerant
charge should be recovered from the system until the leak can be repaired.
When repairing a leak:
• Repair the leak properly – Remove the refrigerant, examine the leak source, determine
the reason for the leak, and carry out the proper course of action.
• Before repairing the leak, ensure that the refrigerant has been recovered and the
system purged with nitrogen when brazing.
• Be sure to remove piercing valves attached to the system after repairs are made.
1. Refrigerant Recovery
Using proper refrigerant practices, place piercing valves toward the end (crimped area)
of the high and low-side process tubes, then recover the refrigerant into an approved
container or device.