Depending on the unit you are working on, service valves vary and will be different. Figure 26-1 shows some different service valves. Service valves are…
Category: Leak Testing
For the isolation test, you will need four line access Schraeder valves with pig-tails, a drum of nitrogen, and a nitrogen regulator. One feature about…
When servicing certain appliances such as domestic refrigerators, window units, package units, ice machines, and automotive air conditioning, there cannot be any guess work as…
The vacuum pump is another important tool, without which professional results are impossible. If a system is only open to atmospheric pressure for a short…
It is usually the condensing unit where a leak test begins. The reason is that at this unit, a leak is the easiest to find…
When a thorough testing of the condensing unit doesn’t show a leak, move on to the evaporator section. Follow the same procedure as the one…