I have a window ac 19000BTU.
The max motor amps 9.4A
Refrigerant R 22
The gas had leaked from the twin capilaries.
The evaporator fins had corrofed so I bought another one. This one had more surface area and the tubes are having a bigger ID I was told the inside has a spral.
The compressor is a rotary compressor make ? because the sticker on the compressor does not dive the name of the manufacturer.
I removed all the oil(as much as possible) from the compressor by tilting it. It was abt 100 ml.
The gas charge of 995 gms is stated on the compressor label. I have no clue as to the oil.
I looked up data sheet of copeland compressor of same cap it had an oil charge of 1100 ml.
How do i determine the oil quantity. I vacuumed about 1100 ml of oil into the comp.
The liquid line out of the condenser is 3/8" od pipe to which is cononnected a drier filter that has a fine mesh in it. One end accepts the 3/8" pipe and there is exit for two capilaries at the other end.
I replaced the old capilary with a new one with same ID and length.
One thing is strange, the caps open into abt 2 feet of 1/4"OD pipes. The other end of these 1/4" pipes is connected into the evaporator.
I charged the gas and adjusted the charge by reaching the max compressor current.
The compressor made funny sounds. I surmised thd the oil quantity was more so I flashed the R22 refrigerantinto the refrigerant bottle. Let it settle down and recharge only vapour (upright bottle).
This was repeated a number of time till the compressore stopped making funny noises.
After two three days of running the max com current has come down to 8.5 amps down from 9.4 amps.
I will make arrangements to measure temp of liguid out from condenser and vapor into the compressor and post them.
BTW the min temp achieved is 23 Deg C.
How do I tweek the system to get more cooling?
At time of charging the disch pressure was 235 psig and at suction it was 65 psig.
This is the first time i have under taken this work.
Regards