Heating Ventilation & Air Conditioning-Maintenance

Compressor repair should be carried out only when it is made sure that the other parts of the system are trouble free. Minor repairs of the system can ordinarily be made without removing the compressor when compressor is worn out considerably it gives out of noise, its main bearing journals are worn out. In such a case it is better to use a new or reprocessed/rebuilt compressor than to attempt repairs particularly when the time and materials are of greater consideration. For the average engineer it is usually more economical to get the repairs done from a repairing shop than the major repairs himself. The following procedure may be followed to check the efficiency of a compressor.- Back seat the suction and discharge service valves and then remove the plugs.- Attach a pressure gauge to the discharge valve and a compound gauge to the suction valve port.- Check both the valves.- Start the compressor and throttle the discharge valve until pressure head of 9 bar is maintained.- Close the suction valve slowly and when it is completely closed note the vacuum on the compound stage.- The compressor may be considered as operating satisfactorily.