AMS
23-05-2010, 09:53 AM
Hi All,
This is going to come across very long winded, but I'm struggling and any help would be appreciated.
I am trying to charge a refrigerated air dryer with a water cooled condenser controlled with a water pressure regulating valve with R407C (liquid charging abviously) after replacing the evaporator, compressor, TX valve and Hot Gas Bypass valve.
The unit is supposed to take approximately 15Kg of refrigerant, though after only putting in 7Kg, I am finding the compressor to be flooding back with liquid refrigerant with frost / ice building up on the compressor.
The water pressure reg valve is set for a discharge pressure of 1650-1700kPa. The following pressures & temps are:
Suction - 230Kpa
Suction temp @ TX bulb - 12 degC
Discharge Temp (@DSV) - 46 degC
Liquid Temp ent. TX - 28 degC
I've tried fully opening the HGBP valve to bring the suction pressure up and prevent the flooding though this isn't doing anything.
I've added refrigerant up to 11Kg though the suction pressure still did not begin to rise.
The suction line temp is quite high, though from the accumulator to the compressor is when it is indicating the flooding back (accumulator appears to be not blocked).
Does anyone know as to whether I should just keep adding refrigerant as I am worried about the potential damage it may be causing to the compressor?
Or I am wondering as to whether the TX & HGBP valves are fighting one another...
Any assistance in this would be greatly appreciated.
This is going to come across very long winded, but I'm struggling and any help would be appreciated.
I am trying to charge a refrigerated air dryer with a water cooled condenser controlled with a water pressure regulating valve with R407C (liquid charging abviously) after replacing the evaporator, compressor, TX valve and Hot Gas Bypass valve.
The unit is supposed to take approximately 15Kg of refrigerant, though after only putting in 7Kg, I am finding the compressor to be flooding back with liquid refrigerant with frost / ice building up on the compressor.
The water pressure reg valve is set for a discharge pressure of 1650-1700kPa. The following pressures & temps are:
Suction - 230Kpa
Suction temp @ TX bulb - 12 degC
Discharge Temp (@DSV) - 46 degC
Liquid Temp ent. TX - 28 degC
I've tried fully opening the HGBP valve to bring the suction pressure up and prevent the flooding though this isn't doing anything.
I've added refrigerant up to 11Kg though the suction pressure still did not begin to rise.
The suction line temp is quite high, though from the accumulator to the compressor is when it is indicating the flooding back (accumulator appears to be not blocked).
Does anyone know as to whether I should just keep adding refrigerant as I am worried about the potential damage it may be causing to the compressor?
Or I am wondering as to whether the TX & HGBP valves are fighting one another...
Any assistance in this would be greatly appreciated.