DIESEL TECHNIC DB9170 Instructions De Montage page 5

Filling the refrigerant
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To remove the residual moisture from the refrigeration circuit, you must evacuate it again.
Proceed as follows to evacuate the remaining moisture present in the refrigeration circuit:
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Connect the air conditioner to the service connections.
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Evacuate the remaining moisture for about 30 minutes.
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If necessary, you can add a UV contrast agent to the refrigerant. This facilitates the search for a possible leakage.
The correct amount of refrigerant can be found on the climate sign near the service keys of the vehicle.
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Now fill the air conditioner with the correct amount of refrigerant according to the manufacturer's instructions.
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After the filling process, remove the air conditioner from the service connections.
Perform test run
To perform a test run, proceed as follows:
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Set the temperature of the air conditioner to maximum cooling capacity.
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Set the blower fan to maximum capacity.
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Start the vehicle's engine and let it idle for five minutes.
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Check the tightness of the refrigeration circuit.
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If there is a leak, determine the cause and eliminate it.
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Check the function of the magnetic coupling.
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If there is a functional fault, determine the cause and eliminate it.
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Check that the temperature of the outflowing air at the middle nozzle corresponds to the manufacturer's specifications.
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Use suitable pressure gauges to determine the pressures on the high and low pressure sides.
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Compare the values determined with the manufacturer specifications.
Note: Cleaning rags that are soaked in or contaminated with hydraulic fluid, as well as old hydraulic fluid
must be collected in a controlled manner and disposed of according to the legal provisions.
Note: The disassembly of an refrigerant compressor for one's own error analysis is prohibited and can
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lead to the total failure of a compressor. Furthermore, the guarantee will be invalidated.
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