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25-08-2012, 09:16 AM #1
Measuring superheat with no access at evap
Morning all
As title, i'm trying to measure the superheat on 3 seperate systems that feed 1 common AHU. Howeve the install engineers did no put in any access ports at the evap outlet. I have access immediately before and after the TXV. The compressors are approx 20mtrs from evap with bends and each system has a suction accumulator.
What do you guys use as a rule of thumb given the pressure drop at the compressor suction service valve?