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

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12.2.10 COOLING CIRCUIT MAINTENANCE
For the cooling circuit maintenance the following instructions must be observed, as well as full compliance with safety ob-
ligations regarding use of the equipment:
1) Check the work pressures and temperatures from the screen of the SySmart controller microprocessor.
2) Check overheating, sub-cooling and desuperheating from the screen of the SySmart controller microprocessor.
3) Check the condition of the liquid sight glass lter.
4) Check operation of the safety devices.
5) Check the calibration and operation of the regulation components.
6) Check the refrigerant charge level and make sure there are no circuit leaks.
7) Check the condition of the cooling coil. Any cleaning needs to be carried out with hot water and soap, using a brush with
long, soft bristles. It is also possible to use compressed air as long as it is oil-free.
12.2.11 REPLACEMENT OF THE MAIN COMPONENTS OF THE COOLING CIRCUIT
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 main components of the cooling circuit (valves, sight glass lter, coils etc.) the following instructions must be
complied with, without prejudice to full compliance with safety obligations arising from 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 may be re-used.
4) Open the cooling circuit by unscrewing the service needle valves with the provided key.
5) Disconnect any electrical connections of the components in question.
6) Remove the component by cutting the pipes next to it and install the new component.
7) Braze everything as indicated in the previous chapters.
8) Close the cooling circuit by re-applying the service needle valves using the appropriate spanner.
9) Perform a test using pressurised Nitrogen to verify that the system is airtight, as specied in the previ-
ous chapter.
10) With soap lather, check all new soldering has been carried out and leave under pressure for at least 24
hours.
11) After the required time, perform a pressure check with the provided pressure gauges.
12) When the test has been completed, empty out all of the nitrogen and proceed to the vacuum phase.
13) Vacuum the cooling circuit, as specied in the previous chapters.
14) Close the panels and return the main switch to “I”.
15) Charge with new Freon, as specied in the previous chapters.
16) Check the operating conditions of the cooling circuit, as specied in the previous chapters.