Engineering manual - SAB 193-233-283 S A-frame (including ATEX)
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008831 en 2022.02
Rotating parts
Warning!
Safety guards, shields, barriers, covers and protective devices must not be removed while the
compressor/unit is operating.
Vibration and noise
During operation, pay attention to the compressor unit process. Excessive vibrations, unusual
sounds, etc. may indicate problems requiring your immediate attention.
Pressure
Danger!
A compressor/unit comprises a pressurised system. Never loosen threaded joints while the
system is under pressure, and never open pressurised system parts.
Note:
Whenever a relief valve/safety valve has been activated, we recommend recalibrating it.
This must be carried out by competent personnel only. See also EN 378 and existing national
legislation.
Cooling water system
Warning!
The recirculation water system may contain chemicals or biological contaminants, including le-
gionella, which can be harmful if inhaled or ingested. Water systems should only be operated
with an effective biological treatment programme.
3.2.4
Safety during maintenance and service
•
Personnel must be competent according to national safety rules and regulations and
perform the maintenance work according to EN 378.
•
Read chapter
before opening the compressor and other parts of
the refrigeration plant.
•
It is recommended to remove all main fuses. Switch off all electric components on the
compressor/unit before starting the dismantling/servicing process and lock the main
switch.
•
Make sure that the motor cannot start up inadvertently.
•
Make sure that there is no over-pressure and no refrigerant in the part to be dismantled.
Close all necessary stop valves.
•
Use the prescribed tools, and check that they are properly maintained and in good
working condition. In explosion-proof areas, use tools suited for this specific purpose.
•
Use only Johnson Controls Denmark original spare parts; other parts may impair the
safety of the compressor/unit.
•
When performing maintenance, the main switch must be locked.
•
Use gloves and protective goggles, and make sure to have a gas mask close at hand.
Also use electrical protection equipment and tools suited for electrical operation
purposes.