ES
FR
EN
IT
16
Madas Technical Manual
- 5|5.4a - REV. 0 of 2
th
Sep 2019
FRG-RG/2MCSH - FRG/2MBH (Z/F/R/M)
EXAMPLE 2 (2MBH... models)
1. Expansion joint/anti-vibration mount
2. Upstream ball valve
3. FRG/2MBH... pressure regulator filter
4. Ball valve downstream of the regulator
5. Vent valve
6. Relief valve MVS/1
7. Low pressure gauge and relative button
8. High pressure gauge and relative button
4.0 - MANUAL RESET
• Make sure that all valves and downstream taps are closed;
• Unscrew the cap (
10
);
• Lightly press the reset pin (
18
), wait a few moments for the pressure to balance and then fully press the reset pin (
18
);
• Hold down the reset pin (
18
), slowly open the valve downstream of the regulator;
• Release the reset pin (
18
);
• Then tighten the cap (
10
) back in 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 (
26
) and (
29
) are not clogged (regulator and shut off);
• IMPORTANT:
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.
To seal the downstream section of the pipe:
• feed the regulator with inlet pressure;
• slowly close the ball valve downstream of the regulator:
• ensuring that the relief valve and any safety shut-offs do not intervene, check that the pressure (indicated on
the pressure gauge) remains stable (does not drop).
NOTE:
under no circumstances should a blind cap be installed in place of dust caps (
26
) and (
29
) 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);
1
2
3
4
5
6
7
8
piping
application
discharge in
open air
discharge in
open air
5 DN
external roof