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On smaller residential air conditioners the manufacturer publishes a charging chart that has the outside air temperature and the corresponding suction and liquid pressure measured by a refrigeration manifold set, gauges. If the chart is not available, you can estimate by measuring the suction pressure and then using a pressure temperature chart for your refrigerant and trying to maintain a 35 degree to 40 degree temperature at the condensing unit or compressor. The other measurement on larger units is the subcooling measurement, measure the actual liquid line temperature and compare the liquid pressure using a pressure temperature chart and also checking for bubbles in the liquid line sight glass. On larger systems after the subcooling has been checked then the superheat has to be checked and the thermostatic expansion valve adjusted if necessary. To check the superheat, measure the suction pressure, convert to a temperature and then measure the actual suction line temperature. The difference is the superheat, should be 6 to 20 degrees depending on the system.
Charging is due to transfer of electrons from one body to another body. Electrons have mass, therefore, mass increases in the case of negatively charged body and decreases in the case of positively charged body.
Charging by friction and charging by induction (works only for conductors)
charging by friction, charging by conduction, and charging by induction.
1.Charging by contact i. Conduction ii. Induction2.Charging by friction
It means charging the A/C system with the proper kind and amount of refrigerant + oil. Overcharging the system will damage the compressor.
On smaller residential air conditioners the manufacturer publishes a charging chart that has the outside air temperature and the corresponding suction and liquid pressure measured by a refrigeration manifold set, gauges. If the chart is not available, you can estimate by measuring the suction pressure and then using a pressure temperature chart for your refrigerant and trying to maintain a 35 degree to 40 degree temperature at the condensing unit or compressor. The other measurement on larger units is the subcooling measurement, measure the actual liquid line temperature and compare the liquid pressure using a pressure temperature chart and also checking for bubbles in the liquid line sight glass. On larger systems after the subcooling has been checked then the superheat has to be checked and the thermostatic expansion valve adjusted if necessary. To check the superheat, measure the suction pressure, convert to a temperature and then measure the actual suction line temperature. The difference is the superheat, should be 6 to 20 degrees depending on the system.
Used to Charge air conditioner - as ambient temperature increases gas pressure also increases. So when charging a/c systems, chart is referenced to make sure that proper amount of refrigerant is used
Liquid
If the compressor will not come on at all, it is not because the system needs charging. Check for a blown fuse, disconnected wire at the compressor, or a defective compressor clutch.
yes
Liquid
Caused from over charging system. Should have a good sweat up to the compressor on the suction line.
The low pressure side.
The charging and discharge time increases. R*C=T
You can find the air conditioning low pressure charging port on top of the air conditioning compressor. The low pressure port will be on the right hand side of the air conditioning compressor.
Some possibilities: (1) The internal cabin temperature sensor may be bad. (2) The relay that controls the A/C compressor is bad. (3) The A/C refrigerant needs re-charging (if there is not enough in the system the compressor will not turn on, in order to prevent itself from burning out).