In addition to the compressor, condenser, receiver, and evaporator, several auxiliaries are required for proper operation of an air conditioning system. Certain devices must be…
Author: sam
The evaporator is that part of the system where the useful cooling is accomplished by removing the heat from the area to be cooled. This…
The receiver is the reservoir for excess liquefied refrigerant that is not being used in the system. Unless other conditions prevent it, the receiver should…
When the refrigerant gas leaves the compressor and enters the condenser, it contains the full load of heat, which consists of the heat picked up…
Compressors are manufactured in various sizes (depending on requirements) and are classified according to their method of operation as reciprocating, rotary, and centrifugal. The function…
Automatic expansion valves are used on some room air conditioners instead of the capillary tubes to control the flow of refrigerant into the evaporator. These…
Whenever a shortage of refrigerant is suspected, this condition can be confirmed by identifying the source of leakage. A leak-test operation can be performed with…
With normal evaporator loading and average outdoor temperatures, if proper cooling is being accomplished, the compressor motor will draw the approximate amperage shown on the…
Under average operating conditions of outdoor and indoor temperatures, all evaporator return bends should be cold and at the same approximate temperature. On most models,…
When a unit operates but does not have its normal cooling capacity, the refrigerant system should be checked. Check for some obvious symptom (such as…