Refrigerants (natural or man-made chemicals) used in a DX Cycle, are controlled substances due to their, a) high pressures (up to 30 bar / 440 psi), b) extreme temperatures (-50˚C to 140˚C), c) flammability (A1, A2, A3 class) & d) toxicity (B1, B2 B3 class) According to ISO 817 and ASHRAE 34 Standards & Classification
Did you know?
It is against the law to work with F gas (refrigerants) if you do not have the correct qualifications. You could receive a civil penalty for breaking the law.
Any equipment containing refrigerants MUSY only be handled by certified engineers holding City & Guilds 2079 (equipment containing A1 class non-flammable) PLUSCity & Guilds 6187-21 (if equipment containing A2L 🔥 flammable such as R32, R454B or A3 class flammable🔥 & explosive 💥HC such as R290 , R270 or R600a)
Did you know, that C&G 2079 covers A1 class non-flammable ONLY like old CFCs (R11, R12, R502, HCFC (R22) or current HFCs (R410A, R407C, R404, R134a, R466. It does not include A2L or A3 classes (See C&G 6187)
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