404a Freezer Pressures

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404a Freezer Pressures

Thread: Normal Freezer Pressures … I just wanted to know what are normal pressures for freezers. Its 404 … Dont have the guagues for 404A.
Most freezers run about a minus 10 evap to get a 0 degree box. So look for a low side pressure of about 25. High side is ambient plus 30.
Physical Properties of Refrigerants. Environmental Classification. Molecular Weight. Boiling Point (1 atm, ˚F). Critical Pressure (psia). Critical Temperature (˚F) .
404a walk in freezer – what to look for … What should I be looking for pressure wise? … Your saturated suction pressure should be ~20° below the actual box .
30 suction pressure is definitely a bit high. It should be running at 10-20psig (10 is ideal) on the suction side if working properly. And the high .
R134A runs at 0psi on the low side and 404A runs at 55psi. Doesn’t matter what machine you have, that’s the pressure they should be running .
Repairs Best Practices – R404A and R134a Freezers and …. the freezer is at about 0°F, the low side pressure should be 8-10PSIG for R404A .
TEMPERATURE PRESSURE CHART – at sea level. To determine subcooling for R-404A use BUBBLE POINT values (Temperatures above 50°F — Gray .
Problems include failure to maintain pressure and compressor failure, both of … Clean walk-in cooler and walk-in freezer condenser coils. ….. is a 404a system it dose not seem to want to come down the only other thing i can .

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