Question about True 49 cu. ft. / 1388 liter Commercial Freezer GDIM-49NT
The pressures depend, somewhat, on the expansion device,i.e. a TXV or Cap Tube. Take a pressure reading, then convert it to a temperature. The evap temp should be right at 10 colder than the box temp. Remember, heat flows to cold so the evap has to "Lead the Load" in order to cool. In many cases, the condensing pressure is usually ambient temp, plus 30, then convert to a pressure. These are general accepted practices that have been used for many years.
Hope this helps
Posted on Jul 12, 2009
The proper operational pressure on the high side is 450 psig and on low is 200 psig for R-404A
Posted on Feb 14, 2010
Not overload the compressor with liquid refrigerant and to help the compressor run below it's designed LRA.
Posted on Jan 21, 2014
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