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Thread: temp / pressure relationship
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27-09-2007, 01:00 AM #1
temp / pressure relationship
hi guys ,
i was working with one of my colleagues the other day when we had to recharge a display fridge with r134a , he charges SYSTEM by relating to the temp pessure relationship , he adds the gas until he gets correct temp on gauges ? say
r134a low side temp is at -5 oC (nowing that the refridgerant will take out 10oC leaving us with a dislay fridge at + 5 oC) so he charges untill he gets the correct temp which then translates to 1.5 bar = -5 oC is this correct ?
rnt we reading the suction pressure that depending on pipe runs etc , couldnt they add up to higher superheat so therefore giving higher pressure readings???
bit confussed !
and trust me it doesnt take much !!
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