First Start-Up - Madas RG/2MB MIN Manual Del Usario

4.0 - MANUAL RESET
• Make sure that all valves and downstream taps are closed;
• Unscrew the protection and reset knob (24), turn it over and tighten the threaded end "A" (see figures 1 and 2) to the reset
pin (25).
• At this point pull down the reset knob (24) until it engages.
• Slowly open the ball valve downstream of the regulator;
• Retighten the knob (24) to the initial position.

5.0 - FIRST START-UP

Before commissioning, verify that:
• all of the instructions on the rating plate, including the direction of flow, are observed;
• the holes of the dust caps (4) and (38) are not clogged.
• IMPORTANT: The leak test of the piping must be performed without subjecting the diaphragm of the regulator
(therefore, the downstream pipe section) to a pressure higher than 300 mbar. Use special manual gas closing
devices to avoid damaging the regulator;
• The pressurisation manoeuvre of the equipment must be carried out very slowly so as to avoid possible damage.
NOTE: under no circumstances should a blind cap be installed in place of the dust caps (4) and (38) as the
regulator and the shut off device may not work;
• Close the ball valve downstream of the regulator and partially open the downstream relief valve;
• Slowly open the upstream shut-off devices;
• Close the vent valve;
• Proceed by manually resetting the regulator (see 4.0);
• Close the downstream valve so as to close the regulator (the P2 or Pa value increases the SG value to fully close the obturator);
• Check the tightness of the system gaskets and check the internal/external tightness of the regulator and of the external
sensor tube, if applicable;
• Slowly open the downstream valve and the shut-off valve;
• Check the operation of the regulator.
6.0 - SETTING
Before carrying out the operations, make sure that the supplied spring/s is/are suitable for the desired Pa or P2 and UPSO ranges.
6.1 - Adjusting the underpressure shut off (UPSO)
• Loosen the caps (1) and (16);
• Unscrew the underpressure shut off adjustment screw to the minimum (18);
• Start the system and reset the shut off device as described in 4.0;
• Reduce the downstream pressure to the desired trigger value;
• Tighten the adjustment screw (18) until the underpressure shut off is triggered.
• Reset the system by following the correct procedure and verify that the trigger value is that desired by repeating the release
step 2-3 times;
• If necessary, adjust the trigger value by turning the adjustment screw (18);
• Tighten the caps (1) and (16) in the respective original positions.
Madas Technical Manual - 4|4.3b - REV. 0 of 26
15
Feb 2019
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RG/2MB MIN - FRG/2MB MIN