Draining and filling of refrigerant
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Draining and filling of refrigerant
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Warning
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Read through the following safety regulations before you start working on the A/C system.
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Wear protective glasses and impermeable gloves, since there is a risk of burn and frost injuries.
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If the skin comes into contact with the refrigerant, the exposed areas should be bathed in cold water and treated like a burn.
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Should the coolant get into the eyes, they must be rinsed thoroughly with water for at least 10 minutes.
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Refrigerant must not intentionally be released into the atmosphere. If, however, the refrigerant is unintentionally released in the premises, open and ventilate well before continuing work.
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Gases that are formed when heating a refrigerant are a health hazard and can have a serious effect on the lungs.
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Work should commence as soon as possible after emptying the A/C system as residual oil may emit refrigerant vapour that could collect and leak out if the work is delayed.
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Smoking and open flames must not occur when handling refrigerants.
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Refrigerant containers must not be exposed to heating, because the pressure will then increase resulting in the risk of explosion.
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For information about the equipment, consult the manufacturer's manuals.
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1.
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Remove the protective covers for the service valves on the high and low pressure pipes.
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2.
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Connect the blue hose to the low pressure pipe. Connect the red hose to the high pressure pipe.
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3.
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The snap-on couplings are shaped like so-called "Schrader valves" and the connection therefore takes place in two stages:
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Fit the snap-on coupling to the service connection.
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Turn the knob clockwise to open the valve and let the refrigerant pass through the connection.
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4.
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Start draining the system. Follow the instructions for each respective machine. Note the quantity of drained compressor oil.
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5.
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Turn off the cocks and disconnect from the machine.
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6.
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Fit the protective covers for the service valves in the high and low pressure pipes.
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1.
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Remove the protective covers for the service valves from the high and low pressure pipes.
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2.
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Connect the blue hose to the low pressure pipe. Connect the red hose to the high pressure pipe.
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3.
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The snap-on couplings are shaped like so-called "Schrader valves" and the connection therefore takes place in two stages:
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Fit the snap-on coupling to the service connection.
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Turn the knob clockwise to open the valve and let the refrigerant pass through the connection.
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5.
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For fully automatic filling
: Fill with compressor oil and tracing agent in accordance with the machine's instructions.
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6.
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Start filling the system. Follow the instructions for each respective machine.
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7.
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Turn off the cocks and disconnect from the machine.
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8.
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Fit the service valves on the high and low pressure pipes.
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