First Start-Up - Madas RG/2MCS Manual Del Usuario

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 (31) and (32) and of the discharge (18) are not clogged (regulator and shut off);
• 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 (for reinforced diaphragm 1.5 times
the regulator setting pressure). 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 dust caps (31) and (32) and of
discharge caps (18) as the regulator and/or the safety shut offs 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 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, of the relief valve 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
The RG/2MCS models are NOT equipped with safety shut offs (OPSO - UPSO).
Before carrying out the operations, make sure that the supplied spring/s is/are suitable for the desired Pa - OPSO - UPSO and
differential relief valve fields.
• Equip yourself with an adequate pressure gauge to control the pressure downstream of the regulator.
• For versions with relief (2MCS and 2MBZ, fig. 1 and 3) use a 10 mm hex socket wrench (commercial wrench) with max
ext. Ø of not more than 15 mm.
• For versions with pilot operated relief (2MCS fig. 2) use an 8 mm hex socket wrench (commercial wrench) with max ext. Ø
of not more than 12 mm.
If calibration is needed: the following must be calibrated in the RG/2MCS versions: P2 - Relief
the following must be calibrated in the RG/2MBZ versions: UPSO - OPSO - P2 - Relief
Calibration of the P2 must be carried out with the system in flow.
Before starting the system (in versions with relief), loosen and remove the cap (1) and fully tighten the relief adjustment nut (19).
Before starting the system (only in versions with safety shut offs RG/2MBZ):
• Loosen the shut off cap (23).
• Loosen and remove the end part of the reset pin (25).
• Using the appropriate wrench (29) fully tighten the OPSO adjustment screw (24) and position the UPSO adjustment
screw (26) at a minimum.
RG/2MCS - RG/2MBZ
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Madas Technical Manual - 5|5.2b - REV. 0 of 2 Sep 2019
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