There are two types of domestic freezers—the upright freezer and the chest-type freezer. The essential parts of the upright freezer are shown in Fig. 13-1.…
Author: sam
Modern service manifolds incorporate additional hand valves, connections for a vacuum pump, and a liquid-indicating sight glass. Some feature Schraeder valves in addition to the…
The first thing you must establish in changing a compressor was the nature of the failure. Of course if it was a mechanical problem such…
This can present a problem due to the automatic reset controls found on most residential and light commercial units. During a malfunction, a control opens…
There are times when everything appears to be operating according to all specifications, yet, insufficient cooling is the complaint. Heat strips energizing with cooling-Check the…
â– Check condensing unit to see if it is operating. Place one hand on the liquid line and the other on suction line. If the…
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…
This switch is used on semi-hermetic compressors to protect them in the event there is an oil pressure problem causing the lack of lubrication of…
Usually, 400 square feet of area with an eight-foot ceiling can be cooled with one ton of air conditioning. One tone of air conditioning is…
This metering device is a very popular type. It is used in both refrigeration equipment, commercial and residential, and air-conditioning equipment, both residential and commercial.…