Table of Contents
Advertisement
7.4.3 Compressors
Action to be performed
Visually inspect compressors
Check noise and vibration level of the compressors
Check the supply voltage of the compressors
Check the compressors' electrical connections
Check the oil level in the compressors by checking the oil level light.
Check that the crankcase heaters are powered and working properly
Check the conditions of the compressors' power cables and their tightness in
the clamps
Daily and monthly works may be carried out directly by the Owner of the system. All other works must be perfor-
med by authorised and trained personnel.
Any kind of cleaning whatsoever is forbidden before disconnecting the device from power supply by turning the
master switch to the OFF position. It is forbidden to touch the device while barefooted or with wet or damp body
parts.
Works on the cooling line must be carried out by qualified and trained technicians, as provided by local laws and
regulations in force.
Before the start-up it is necessary to carry out all the operations described in the previous tables and make the
necessary checks provided by the pre-start control module (valid for the italian market) to be requested to the
service.
7.5 Refrigerant 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, even if it is only a partial leak, do not top up. The entire charge must be
recovered, the leak repaired and a new refigerant 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.
Every
Monthly
2 months
64
Frequency
Every
Every
Every
6 months
year
5 years
X
X
X
X
X
X
X
As neces-
sary
Rev. A 11-2020
Advertisement
Table of Contents
