Question about Freezers
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Posted on Jan 02, 2017
SOURCE: normal operating pressures
Normal operating pressures will change as the freezer reaches the selected temperatures on the inside. Normals of minus 14 degrees on the inside would be around minus 4 psi on the suction and 150 pis on discharge. Now checking the pressure will require a set of guages that have been purged with the same freon before connecting with the suction line on freezer. If not purged the suction line will draw outside air into the system and cause freezing of air and moisture inside the capillary tube rendering the freezer inoperative, Hope this helps, Sea Breeze
Posted on Nov 02, 2007
For a 404 system pressures should be about 60/350 Remember when you recharged always with the freon drum upsidedown so liquid gas is going in to the system.But if it's freezing up could be the thermostat or the timer or the heaters.
Posted on Aug 14, 2009
SOURCE: head pressure too low
Charge until the sight glass is full. I suspect your pressures will be be better. 12 psig is low even if the case is down to temp. I suspect once the sight glass is full you'l be runniing in the upper 20's.
Posted on Apr 06, 2012
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