Understanding RefrigerantBlend Performance

UnderstandingefrigerationrSince the phaseout ofCFCs more than 10 yearsago, refrigerant blendshave become common-place in the rmarket for both retrofitand new installations. Equipment thattraditionally used R-12 or R-502 isnow running on one of approximately13 commercially available you consider the pendingphasout of R-22, another three orfour blends get thrown into the addition, contractors and ser vicetechnicians must know the pitfalls ofefrigerant blends. Fortunately, wehave lear ned much about blend per-for mance during the last 15 refrigerant blend has its ownunique properties that are somewhatdifferent from the original productthey are intended to replace. Byunderstanding how blends differfrom single-component refrigerants,contractors and technicians can bet-ter identify or avoid blend-relatedproblems when installing or servic-ing and temperature glidewill affect system operation, controlsettings and service/troubleshootingpractices.

Understanding efrigeration r S ince the phaseout ofCFCsmorethan10years ago, refrigerant blends have become common-place in the r market for both retrofit

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