Profroid QUIETCO2OL MC Notice D'instruction page 72

REFRIGERANT PIPING WORK
Prevent contamination of foreign objects such as dust, metal
powder, oxide scale, etc.
Since the compressor consists of high precision components, contaminants generate
scratches on the sliding surfaces, thereby increasing gas leak, deteriorating performance,
and causing excessive wear and seizure.
– Flow nitrogen gas during welding.
– Piping inside and outside must be clean.
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