Filling of R134a refrigerant from a 725 gramme refrigerant flask
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Filling of R134a refrigerant from a 725 gramme refrigerant flask
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1.
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Close the cocks on the blue low-pressure hose and red high-pressure hose on the pressure gauge stand.
Warning
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Only the low-pressure side of the AC system may be filled with refrigerant from a 725 gramme refrigerant flask. If the flask is connected to the high-pressure side, there is a risk of it exploding when the car's engine is started!
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2.
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Close the valve in the snap-on coupling on the red high-pressure hose on the high-pressure side of the AC system by turning the knob anticlockwise.
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3.
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Then remove the red high-pressure hose's snap-on coupling and refit the protective plug in the connection.
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4.
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Place the flask with refrigerant upside down and open the cock on the flask.
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Important
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The flask with refrigerant must be stood upside down as otherwise it is not possible to empty it completely.
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5.
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Fill with 200 grammes of refrigerant by carefully opening the cock on the blue low-pressure hose on the pressure gauge stand for about 10 seconds. 200 grammes of refrigerant corresponds to a pressure of 4-5 bar.
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6.
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Move the AC hoses slightly and check with a leakage detector designed for R134a that there are no leaks in the system.
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7.
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Open the cock on the blue low-pressure hose on the pressure gauge stand and continue filling until the pressure has stabilized.
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8.
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Close the cock on the blue low-pressure hose on the pressure gauge stand.
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9.
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Start the engine and wait until the compressor starts to work. Rev up the engine so that the pump vanes are flung outwards (this will be noticed by the pressure dropping below 3 bar on the gauge by the blue low-pressure hose on the pressure-gauge stand).
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10.
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Open the cock on the blue low-pressure hose on the pressure-gauge stand when the compressor starts working so that the remaining amount of refrigerant is sucked into the compressor.
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11.
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Close the cock on the blue low-pressure hose on the pressure gauge stand when the bottle with refrigerant is empty.
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12.
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Close the valve in the snap-on coupling on the blue low-pressure hose on the low-pressure side of the AC system by turning the knob anticlockwise.
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13.
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Remove the blue low-pressure hose's snap-on coupling and refit the protective plug in the service valve.
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14.
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Close the cock on the flask with refrigerant.
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15.
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Remove the yellow hose from the flask with refrigerant.
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