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Draining and filling of refrigerant

Draining and filling of refrigerant

Warning

Read through the following safety regulations before you start working on the A/C system.

Wear protective glasses and impermeable gloves, since there is a risk of burn and frost injuries.

If the skin comes into contact with the refrigerant, the exposed areas should be bathed in cold water and treated like a burn.

Should the coolant get into the eyes, they must be rinsed thoroughly with water for at least 10 minutes.

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.

Gases that are formed when heating a refrigerant are a health hazard and can have a serious effect on the lungs.

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.

Smoking and open flames must not occur when handling refrigerants.

Refrigerant containers must not be exposed to heating, because the pressure will then increase resulting in the risk of explosion.


For information about the equipment, consult the manufacturer's manuals.

Draining


1. Remove the protective covers for the service valves on the high and low pressure pipes.

2. Connect the blue hose to the low pressure pipe. Connect the red hose to the high pressure pipe.

3. The snap-on couplings are shaped like so-called "Schrader valves" and the connection therefore takes place in two stages:

Fit the snap-on coupling to the service connection.

Turn the knob clockwise to open the valve and let the refrigerant pass through the connection.

4. Start draining the system. Follow the instructions for each respective machine. Note the quantity of drained compressor oil.

5. Turn off the cocks and disconnect from the machine.

6. Fit the protective covers for the service valves in the high and low pressure pipes.


Filling


1. Remove the protective covers for the service valves from the high and low pressure pipes.

2. Connect the blue hose to the low pressure pipe. Connect the red hose to the high pressure pipe.

3. The snap-on couplings are shaped like so-called "Schrader valves" and the connection therefore takes place in two stages:

Fit the snap-on coupling to the service connection.

Turn the knob clockwise to open the valve and let the refrigerant pass through the connection.

4. For manual and semi-automatic filling : Fill with compressor oil and tracing agent, see Filling and adjustment of compressor oil .

5. For fully automatic filling : Fill with compressor oil and tracing agent in accordance with the machine's instructions.

6. Start filling the system. Follow the instructions for each respective machine.

7. Turn off the cocks and disconnect from the machine.

8. Fit the service valves on the high and low pressure pipes.