Regulations & Safety第 75 / 240 题
A technician is working with an A2L refrigerant such as R-32 or R-1234yf. What added safety consideration applies compared with older non-flammable HFCs?
a.A2L refrigerants can be vented safely because they burn off
b.No difference; treat them exactly like R-22
c.They require no leak detection at all
d.They are mildly flammable, so keep ignition sources away and follow the manufacturer's and code safety requirements
解析
A2L refrigerants are mildly flammable, so technicians must keep ignition sources away, ensure ventilation, and follow the manufacturer's and applicable code safety requirements. Being flammable does not make them safe to vent, and they cannot be treated exactly like non-flammable R-22, nor do they excuse skipping leak detection. Proper handling of low-GWP flammable refrigerants is increasingly important as they replace higher-GWP HFCs.
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