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© 11.2023
7.17
7.16
7.19
7.18
7.14
7.15
7.14
7.4 Initial Commissioning / Recommissioning
Initial commissioning of the system components shall be carried out by the operator. For commissioning, please refer to
the documents listed under item 1 “General Information” and the system operator's work instruction.
The devices delivered by MEDENUS Gas-Druckregeltechnik GmbH are factory-set to the operating data specified by the
customer. This data is listed on the Acceptance Test Certificate (ATC)* and the type plate.
Prior to commissioning of the system, a functional test must be performed on the gas pressure
regulator (GPR), if applicable, and the safety shut-off and safety relief valves.
Procedure (fig. 7.1)
• Close the ball valve upstream of the valves and fittings (item 7.01).
• Close the downstream shut-off devices (item 7.13) (ball valve, solenoid or pneumatic valve).
• Depressurize the system (item 7.11).
• Close the venting ball valve (item 7.11).
• Slowly open ball valve upstream of the valves and fittings (item 7.01) (pressure increase approx. 0.5 bar/s).
If the inlet shut-off device is equipped with a bypass, the latter must be slowly opened for pressure
compensation as step 1. This is followed by slowly opening the inlet shut-off valve which will close the
bypass. The same is true of the outlet shut-off valve.
• Check the inner leakage of the SSV (item 7.06) by reading the pressure gauge
installed downstream of the GPR (item 7.12).
• Unscrew the sealing cap (item 7.15) of the safety shut-off valve (SSV).
• Perform pressure compensation via the SSV by pulling at the pull knob (item
7.14) and allow the SSV to engage. On a GPR with bypass ball valve (item 7.28),
open the ball valve (item 7.28) while pulling the pull knob (item 7.14) until the
SSV engages to perform pressure compensation.
• A closing pressure corresponding to the set value is established on the GPR.
• Testing the response pressure of the SSV by slowly increasing or decreasing
the output pressure to response pressure.
• It may be necessary to correct the setpoint values of the response pressures.
This is done by turning the SSV setpoint setting screws (items 7.17 / 7.19) to
the right (pressure increase) or left (pressure decrease) in order to increase/
decrease the setpoint value.
The inner setting screw (item 7.17) sets the underpressure shut-off
level (lower trigger level) and the outer setting screw (item 7.19) sets
the upper trigger level.
• Perform pressure compensation via the SSV again by pulling the pull knob
(item 7.14) and allowing the SSV to engage.
*) Acceptance Test Certificate (ATC) available optionally
Note
Note
Note
Fig. 7.3
Fig. 7.4
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