How to fill the conditioner with the refrigerant

Air and moisture exhaust
Refrigerant filling
Checking of the refrigerant amount
Distinctive features at checking of the systems of air-conditioning, filled with the refrigerant R-134a

Checking of the refrigerant amount can be carried out under the indication of pressure of a manometer and a condition of the refrigerant course, under viewing glass of a receiver - dehydrator. Besides a condition of bubbles under viewing glass and pressure of a pressure in the big degree depend on temperature of external air, condenser, general temperature, ventilated stream speed, climate. Therefore, checking of the system of air-conditioning will be carried out under the following conditions and criteria:

Norm of check:

temperature of external air - above 20°C;
operating time, refrigerating systems - over 5 minutes.

Difference of temperatures of high and low pressure pipelines at operation of the air-conditioning system

At normal work:

the difference of temperatures between pipelines of high and low pressure (that is, the pipeline of a high pressure hot, and low - cold) is appreciably felt).

At abnormal work:

there is a small difference of temperatures between pipelines of high and low pressure;
almost no temperature difference between pipelines low and a high pressure;
the temperature difference is too great because the pipeline of a high pressure is hot, and low pressure is cold.

Definition of the refrigerant amount is through the observation glass of the receiver - dehydrator.

Attention: When the refrigerant almost or absolutely is not present, after air exhaust, they fill with a new refrigerant and will check on presence of outflow. When the refrigerant is in excessive amount, it is lowed down to the regulated amount.

Kind	Refrigerant amount	Characteristic
	Norm	Almost clean. If occasionally there is a foam, it disappears depending on change of speed of the engine. (the high pressure is usual in a normal condition: 14–18 kg/sm², low pressure — 1,5–3 kg/sm²
	Deficiency	Foam is observed regularly, and color - white or colourless. (Values of high and low pressure are low)
	Almost none	Course tiny foams are observed like a fog. (Value of high pressure is too low)
	Too many	Foam bubbles are not visible at work of the engine idling, the maximal speed of the fan in open condition of windows of the automobile. (Value of high and low pressure are too high)