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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.
2.3.3
Cooling water systems
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.
2.3.4
Cooling media
Cooling media (brines) often consist of alcohol, glycol and halogenated compounds.
In general, all brines must be considered harmful to nature, and they must be used with caution.
Be very careful when charging or purging a refrigeration plant.
Disposal of brine
The brine must be collected in suitable containers clearly marked with the contents and sent to an
approved hazardous waste disposal site. However, in some cases, if approved by the local author-
ities, brine can be discharged into the sewage system.
2.3.5
Safety during maintenance and service
•
Personnel must be competent according to national safety rules and regulations and per-
form the maintenance work according to EN 378.
•
Read chapter 2. Safety in this manual before opening the compressor and other parts of
the refrigeration plant. If the switch is not locked, all start buttons must be tagged with
"DO NOT START" tags and an explanation: "Work on unit in progress".
•
Make sure that the motor cannot start up inadvertently. Switch off all electric components
on the compressor/unit before starting the dismantling/servicing process. It is recom-
mended to remove all main fuses.
•
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 work-
ing 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.
•
Use gloves and protective goggles, and make sure to have a gas mask close at hand.
2.3.6
Power supply
Danger!
•
The voltage used in the drive can cause severe electric shock and/or burns and may be le-
thal. Extreme care must be taken at all times when working with or close to the drive. Spe-
cific warnings are given wherever relevant in this manual.
•
The drive line is connected to voltage. Be aware of live circuits.
•
Pay close attention to the electrical installation and system maintenance to avoid hazards
both during normal operation or in the event of equipment malfunctioning.
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Safety
Operating manual - ComPAC
011769 en 2020.03
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