ROTHENBERGER Stickstoff-Set User Manual
Page 12
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By means of the regulator regulating valve, slowly reach the test pressure wanted.
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Close the intermediate ball valve on the hose. Superimpose the red pointer to the pressure
gauge (4) pointer and let the whole for about 5-15 seconds (according to the dimensions of
the system) in this condition.
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During these seconds, check the tightness by means of an electronic leak detector (XL-1A,
Art.-No. 0873.01, XP-1A, Art.-No. 0873.02 (not available in Germany) if refrigerant has been
charged or by means of special detectors in the areas of possible leaks.
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After this short period of time and after having checked that there were no leaks, disconnect
the equipment until complete discharge.
Using 950cc cartridges, it may be that the pressure in the bottle is insufficient to reach the test
pressure required by the system. Use a new bottle in order to reach the correct pressure test. The
residual contents in the bottle may be used for operations for which only a low pressure is
required (fluxing during welding) or to perform a successive pressurization at lower values.
2. Systems flushing
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Make connections and prepare the 1689.01 flushing system (not available in Germany).
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Connect the kit’s hoses to the flushing system (open ball valve on the hose with (4) pressur
gauge).
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Regulate the regulator over the Regulating knoband set up the pre-established value (in the
range 0,5 – 0,7 MPa). See user’s manual for 1689.01
3. Fluxing with nitrogen during welding/brazing
The presence of oxygen during welding/brazing causes the forming of oxides inside
the hose, which are very noxious for the refrigeration and conditioning systems. All
this can be avoided with the usage of nitrogen.
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Make connections as in the diagram.
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After having made the connections and opened the pressure regulator at the lowest pressure
(0,5MPa), regulate the correct pressure value (~ 0,02 – 0,05 MPa) for welding by means of
the valve situated on the hose with gauge.
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Close the valve on the bottle or disconnect the 950 cc cartridge after having completed the
operations and go on with disconnection.
4. Checking the correct calibration of pressure gauges and pressure switches
The kit being equipped with a pressure gauge with scale – 0,1 + 5,3 Mpa, class 1, it is
possible to check the correct calibration of pressure gauges (4) and pressure switches by
connecting them to the ends of the hose with pressure gauge.
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Storage
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The pressure regulator must be stored as a precision instrument. It must be stored in its case
so that to be protected from accidental shocks or from dust, oil, or any other impurity
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Maintenance
• Replacement parts are available on request. If you notice something wrong in the
regulator, which cannot be repaired following these instructions, send it back to
your distributor.
• Do not clean the gauges glasses with petrol, solvents or detergents of any type.
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ENGLISH