Is it possible to replace R-600a compressor with R-134a/HC compressor?
It is possible to replace but has to take care of capillary, filter driers, quantity of charge required, Oil to be changed (but generally comes with the compressor) etc. c.HFC Refrigerants Q1 Can we charge R12 in a 134a system? What will be the consequence? Apart from violating the Ozone Rules, the following technical problems can also arise: a) Cross contamination of R12 and 134a can lead to an unpredictable performance. b) Capillary for 134a systems is usually about 40% to 60% longer than those for R12 for the same bore of capillary. This will affect performance. c) Compressor motor can get overloaded and burn out. Q2 Can we charge 134a (being a single fluid) observing the back pressure? Theoretically yes, if the back pressures that are to be obtained for various evaporator temperatures at different ambient temperatures, are available from the OEM. Here again, when charging is done in the field, ambient temperatures are never constant (unlike the temperature controlled test room of a
