# What are the normal operating pressures for R-22?

## What are the normal operating pressures for R-22?

R22 gauge pressure is 10.9 bar or 158.2 psi. High side pressure typically varies by equipment and metering controls. Low pressure or suction side typically varies by equipment. Low-pressure refrigerant turns on the carrier HVACR at 50 psi (R22 pressure at 30 degrees) and closes at 100 psi (R22 pressure at 85 degrees).

What should AC gauges read R-22?

IF the return temperature is 75 the evaporating temperature of the R-22 should be between (75-40=35) and (75-35=40). THE LOW SIDE NEEDLE SHOULD POINT BETWEEN 35 AND 40 DEGREES (in the green ring of numbers) FOR R-22 AND THE PRESSURE IS READ WHERE THE NEEDLE POINTS ON THE BLACK RING OF NUMBERS FOR PRESSURE.

How can you tell if R-22 is low?

7 Signs Your AC Unit is Low on Refrigerant

1. It takes a long time for your home to cool off.
2. Vents are not blowing cool air.
3. The temperature you set is never reached.
4. Your electric bill is higher than normal.
5. Ice on refrigerant lines.
6. Water leaking around heater.
7. Hissing or bubbling noise.

### What is a good superheat for R22?

For example, 68 psi suction pressure on a R-22 system converts to 40F. Let’s say the suction line temperature is 50F. Subtracting the two numbers gives us 10F of superheat. Superheat for most systems should be approximately 10F measured at the evaporator; 20F to 25F near the compressor.

Can you use R134a gauges on R22?

R134a refrigerant is an alternative that contains no chlorine and hence no ozone depletion potential. It’s a greenhouse gas, though, and it doesn’t work as well as R22.

Should I replace my R22 air conditioner?

The ban doesn’t require you to replace a functioning, R22 refrigerant AC or heat pump system. Even though OPTION 1 may sound like an easy fix, the price of R22 refrigerant is subject to shrinking supply. This may make R22 very expensive.