Operating - Rothenberger NITROGEN-KIT Bedienungsanleitung

 Successively, connect the flexible hose (3) and the hose with valve and the check pressure
gauge (4) and valve closed.
Opening
 Rotate clockwise very slowly the regulating knob in order to reach the desired value of the
output pressure. The output pressure gauge on the regulator will indicate the value.
If the valve is opened too fast, this may damage the gauges!
 Slowly open the valve on the bottle: the high pressure gauge will indicate the pressure inside
the bottle (only for bottles from 5 - 10 L)
 Make sure that all connections are correctly made.
The output pressure must not, be higher than the pressure necessary for the operation to
be performed and must never rise above the red pointer on the regulator low pressure
gauge!
Before opening the bottle valve, make sure that the regulator is open (rotate the regulating
knob anti-clockwise)!
Regulating the pressure
 To increase the pressure: slowly rotate the regulating knob clockwise.
 To lower the pressure: slowly rotate the regulating knob anti-clockwise.
Closing
 Close the bottle valve and disconnect the 950cc cartridge.
 Have the gas discharged until zero setting of the regulator pressure gauges. Rotate the
regulating knob anti-clockwise until complete closing.
2.4

Operating

1. Tightness test in pressure and checking for leaks with an electronic or a spray leak
detector
Before performing any test. A pressure to high may cause serious damage to persons and
to the equipment on which you operate. Differently, a pressure to low may be useless for
reaching the pre-established goals!
 Check the correct test pressure (supplied by the manufacturer of the system or of the com-
ponent).
 After the starting and after having checked the correct test pressure, connect the kit to the
system on which you operate (open ball valve on the hose with (4) pressure gauge).
 By means of the regulator regulating valve, slowly reach the test pressure wanted.
 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.
 During these seconds, check the tightness by means of special detectors in the areas of
possible leaks.
 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. 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!
 Make connections as in the diagram.
ENGLISH 9