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3.4 - GENERIC EXAMPLE OF AN INSTALLATION
(Burner Gas Train)
1. FM gas filter
2. OPSO series MVB/1 MAX shut off valve
3. RG/2MC pressure regulator
4. Minimum pressure switch
5. JVPC/NC fast opening automatic solenoid valve
6. Maximum pressure switch
7. JVPCS/NC slow opening automatic
solenoid valve
4.0 - FIRST START-UP
• Before start-up make sure that all of the instructions
on the rating plate, including the direction of flow, are
observed;
• After having gradually pressurised the system,
check tightness and operation of the solenoid
valve, by powering / disconnecting it electrically.
4.1 - RECOMMENDED PERIODIC CHECKS
• Use a suitable calibration tool to ensure the bolts are
tightened as indicated in 3.2;
• Check tightness of the flanged/threaded connections on
the system;
• Check tightness and operation of the solenoid valve;
• Clean the product regularly to prevent dust from building
up;
• It is essential to eliminate the risk of ignition caused by stray
currents or any condition of potential difference between
the devices fitted on the system. Periodically check that
there is good electrical conduction between the valve body
and the equipotential plant line and between the coil and
the equipotential plant line.
It is the responsibility of the final user or installer to define the
frequency of these checks based on the severity of the service
conditions.
JVP-JVPC(Q-R-S-T)/NC
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1
2
3
8. External reset
9. Burner control
10. MTC10 valve proving system
11. MVS/1 relief valve
12. Pressure gauge and relative button
13. Gas detector
discharge in open air
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12
5
4
4.2 - ADJUSTMENTS
Must be carried out with the system stopped and
valve NOT electrically powered. It is recommended
to wait for the coil to cool down (if previously
powered) and/or, to use suitable protections for the
hands against heat;
• Adjust the obturator opening speed from the screw (24).
Gradually increase opening speed by turning the screw (24)
clockwise. IMPORTANT: Changes to inlet pressure and room
temperature can affect valve opening time.
• Adjust the fast stroke by turning the screw (22). By turning
it anticlockwise to the stroke end, valve opening will
immediately be slow. By turning it clockwise, it will initially
be fast and then slow.
• The flow rate can be adjusted by loosening the protection cap
(20) completely and turning the screw (21). Turn it clockwise
to decrease the flow rate, and anticlockwise to increase it. When
you are finished, tighten and secure the protective cap (20) in its
original position.
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Madas Technical Manual - 1|1.2bJ - REV. 1 of 10
Power
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Sep 2020
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