Question about True T-49 Side by Side Refrigerator Commercial
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Posted on Jan 02, 2017
SOURCE: What is the normal operational
why yes there is. Generally speaking, the head pressure should be around the "ambient +30" rule.
That is, measure the entering air temp to the condenser, say 75 degrees. Now add 30 to that and get 105 degrees. Look at a P/T chart and see what the pressure is for that temp which is about 253 for R-404-A.
The evap on a freezer leads the load so, as a general rule, the evap temp is going to be around minus 10 degrees to get a 0 degree box. Coolers are different. So, the pressure for a minus 10 evap is around 25 or so. But the unit has to be close to operating temp. If the box is warm, naturally the pressure is higher. And what influences the pressure is whether or not it's a TXV or a cap tube system.
If a TXV and no receiver, charge by subcooling. If a receiver, fill by sight glass. If Cap tube, charge by superheat.
Hope that answers your question.
Posted on Oct 06, 2010
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Hello friend, thanks for the post!
Based off the information you have provided your compressor can be hot to the touch because it is working to help cool down your refrigerator. I would allow it the opportunity to maintain proper temperature inside of your appliance before it stops running. I hope this is helpful. -Matt
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