Draining and filling of refrigerant |
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- | Snap-on couplings |
- | Measuring pressure with the Robinair 1032 Smart Cart
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- | Robinair 10324 Smart Cart and Robinair 17234 draining station
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- | Vacuum pumping and filling of refrigerant |
Important | ||
Under no circumstances whatsoever must the draining and filling equipment for R134a refrigerant be used for R12 refrigerant, and vice versa. | ||
Snap-on couplings |
1. | Press the snap-on coupling onto the service connection. |
2. | Turn the knob clockwise to open the valve and let the refrigerant pass through the connection. |
Measuring pressure with the Robinair 1032 Smart Cart |
1. | Check that both the valve on the blue low-pressure hose and the valve on the red high-pressure hose on the pressure gauge stand are closed. |
2. | Using a snap-on coupling, connect the blue low-pressure hose to the low-pressure side of the A/C system. |
3. | Using a snap-on coupling, connect the red high-pressure hose to the high-pressure side of the A/C system. |
4. | Open the valves on both snap-on couplings by screwing in the knobs. |
5. | Start the engine. With the engine running at idling speed and the air temperature at 20 °C, the following pressures should be shown on the pressure gauge stand when the compressor is running: Low pressure side: 1.5-2.5 bar |
Robinair 10324 Smart Cart and Robinair 17234 draining station |
1. | Using a snap-on coupling, connect the blue low-pressure hose to the low-pressure side of the A/C system. |
2. | Using a snap-on coupling, connect the red high-pressure hose to the high-pressure side of the A/C system. |
3. | Open the valves on both snap-on couplings by screwing in the knobs. |
4. | Using the yellow hose, connect the pressure gauge stand middle outlet to the draining station. |
5. | Open the valves on the blue low-pressure hose and the red high-pressure hose as well as the valve on the yellow hose connected to the pressure gauge stand middle outlet. |
6. | Open the blue valve (”Liquid”) for liquid refrigerant and the red valve (”Gas”) for gaseous refrigerant on the draining station container.
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7. | Start the draining station. When draining is finished, the draining station will switch off automatically. |
8. | Close the valves on the blue low-pressure hose, the red high-pressure hose and the yellow hose connected to the pressure gauge stand middle outlet. |
9. | Remove the yellow hose from the draining station. Draining has now been completed and work on the A/C system can commence.
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Vacuum pumping and filling of refrigerant |
Important | ||
Vacuum pumping should be done on simultaneously on both the high pressure and low pressure sides. A non-return valve on the compressor low pressure side makes it impossible to vacuum pump from only one side. | ||
1. | Using a snap-on coupling, connect the blue low-pressure hose to the low-pressure side of the A/C system. |
2. | Using a snap-on coupling, connect the red high-pressure hose to the high-pressure side of the A/C system. |
3. | Open the valves on both snap-on couplings by screwing in the knobs. |
4. | Open the valves on the blue low-pressure hose and red high-pressure hose on the pressure gauge stand. |
5. | Open the blue valve (”Liquid”) for liquid refrigerant on the Smart Cart container. |
6. | Check that the valve on the yellow hose on the pressure gauge stand middle outlet is closed. |
7. | Programme 30 minutes vacuum pumping by pressing ”30” on the control panel in position ”Vacuum minus”.
Confirm the selection by pressing ”ENTER”. |
8. | Press ”REV.PROG.” |
9. | Press ”0.87” to indicate the amount of refrigerant (in kilograms) to be refilled. Confirm the selection by pressing ”ENTER”. |
10. | Press ”REV.PROG.” |
11. | Press ”START” to start vacuum pumping.
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12. | Move the A/C hoses slightly and make sure that there are no leaks in the system. The pressure must not increase by more than 10 mbar over a period of 2 minutes. |
13. | Press ”START” to start refilling the refrigerant. |
14. | Stop refilling by pressing ”HOLD” when about 200 grams of refrigerant has been refilled. |
15. | Move the A/C hoses slightly and check with a leakage detector designed for R134a that the system does not leak. |
16. | Continue refilling by pressing ”START”.
”CPL” is shown on the control panel display. |
17. | Close the valves for the blue low-pressure hose and the red high-pressure hose on the pressure gauge stand. |
18. | Start the car and read the pressure once it has stabilized. The pressure on the low-pressure side should be 1.5-2.5 bar. |
19. | Close the valves on the snap-on couplings on the A/C system service connections by turning the knobs counter-clockwise. |
20. | Remove the snap-on couplings and refit the protective plugs in the service valves. |