SYSTEMP – Installation Operation Manual (IOM SYSTEMP rev.N)

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12.2.12 COMPRESSOR REPLACEMENT
ATTENTION! DANGER!
Neither the circuit nor the compressor must be left in open air for more than 15 minutes to
avoid humidity contaminating the oil.
To replace the compressor the following instructions must be observed, as well as full compliance with safety obligations
regarding use of the equipment:
1) Set the main switch to "0".
2) Open the panels via the relevant safety locks.
3) Collect all refrigerant (with the special recovery pump, pressure gauges and rechargeable tank).
This gas cannot be re-used and must be regenerated.
4) Open the cooling circuit by unscrewing the service needle valves with the provided key.
5) Disconnect all electrical connections from the terminal board of the compressor.
6) Cut the suction and supply pipes next to the compressor.
7) Remove the xing screws and extract the compressor, always keeping it vertical.
8) Check for any remaining oil in the cooling circuit and perform an acidity test (Virginia Parker ETK
TEST KIT or similar).
9) Should the system be extremely contaminated with carbon or from decomposition of oil products
due to burning of the compressor, it is necessary to eliminate all this contamination by cleaning up
all cooling components (pipes, evaporation coils, condenser, liquid receiver) with special clean-up
uid that is easily evaporated (Parker ParFlush Kit or similar).
10) Blow NITROGEN into the whole cooling circuit to eliminate all clean-up uid.
11) Install a lter-drier and de-acidier on the suction line of the compressor (Parker SLD Series or sim-
ilar).
12) Replace the inspection lter on the liquid line with one that is a lter-drier and de-acidier Sporlan
Parker WSG Series or similar).
13) Install a new compressor, always keeping it vertical.
14) Weld everything as indicated in the previous chapters.
15) Close the cooling circuit by re-applying the service needle valves using the appropriate spanner.
16) Perform a test using pressurised Nitrogen to verify that the system is airtight, as specied in the
previous chapter.
17) With soap lather, check all new soldering has been carried out and leave under pressure for at least
24 hours.
18) After the required time, perform a pressure check with the provided pressure gauges.
19) When the test has been completed, empty out all of the nitrogen and proceed to the vacuum
phase.
20) Vacuum the cooling circuit, as specied in the previous chapters.
21) Close the panels and return the main switch to “I”.
22) Charge with new refrigerant, as specied in the previous chapters.
23) Check the operating conditions of the cooling circuit, as specied in the previous chapters.