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End of seasons or unit switched off
If the unit is to be left out of commission for a long period, the hydraulic circuit should be drained down. This operation is
compulsory if the ambient temperature is expected to drop below the freezing point of the fluid in the circuit (water or
Glycol mix).
R
EFRIGERANT CIRCUIT REPAIR
If the refrigerant circuit is to be emptied, all the refrigerant must be recovered using the correct equipment.
For leak detection, the system should be charged with nitrogen using a gas bottle with a pressure reducing valve, until 15 bar
pressure is reached. Any leakage is detected using a bubble leak finder. If bubbles appear discharge the nitrogen from the circuit
before brazing using the proper alloys.
Never use oxygen instead of nitrogen: explosions may occur.
Site assembled refrigerant circuits must be assembled and maintained carefully, in order to prevent malfunctions.
Therefore:
• Avoid oil replenishment with products that are different from that specified and that are pre-loaded into the compressor.
• In the event of a gas leakage on machines using refrigerant R407C, even if it is only a partial leak, do not top up. The entire
charge must be recovered, the leak repaired and a new refrigerant charge weighed in to the circuit.
• When replacing any part of the refrigerant circuit, do not leave it exposed for more than 15 minutes.
• It is important when replacing a compressor that the task be completed within the time specified above after removing the
rubber sealing caps.
• When replacing the compressor following a burn out, it is advisable to wash the cooling system with appropriate products
including a filter for acid.
• When under vacuum do not switch on the compressor.
8.
DECOMMISSIONING
D
ISCONNECT THE UNIT
All decommissioning operations must be performed by authorized personnel in accordance with the national legislation in
force in the country where the unit is located.
• Avoid spills or leaks into the environment.
• Before disconnecting the machine please recover:
• the refrigerant gas;
• Glycol mixture in the hydraulic circuit;(if applicable)
• The compressor lubricating oil.
Before decommissioning the machine can be stored outdoors, providing that it has the electrical box, refrigerant circuit and
hydraulic circuit intact and closed.
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