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Cruisair Output Temps?
Today I got a 14 degree differential between inlet and outlet temps from my 3 Cruisairs, not 30+ like I stated in a previous post. ???? I’ve got a theory, AIR MIXING, or lack thereof.
When I get 30+ degrees differential I’m getting the outlet temp from deep inside the duct work w/my IR temp gun. The temp is taken from a place where no ambient air has had a chance to mix with the COLD air coming from the evaporator.
Today, when I got only a 14 degree differential, I was using our household countertop digital units that I set on the edge of the air outlet areas where the COLD air has already mixed w/ambient.
IMO, I think the best way to tune a Cruisair for max differential is by getting the temp at the suction/low side king valve. Slowly add R-22 until the temp doesn’t decrease anymore.
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1 Reply
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That is the way Cruiseairs have been fine tuned. It has been a while but that point is reached just as the fluid in the sight glass is changing from foamy bubbles to almost pure liquid. It still has passage of miniscule bubbles when it is at its coldest.
Cruiseairs are very sensistive to the charge of R22 and a little less or a little more than the right amount can make a difference. Unlike most systems where the gauges are the primary way to know when the charge is right, in the case of Cruiseairs it tends to be the line temperature.
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