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© 05.2022
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
•
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) (max. 500 mbar/sec.).
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.
•
For the functional test of the GPR, let gas flow via the discharge line (venting)
(item 7.11) to the outside atmosphere and read the set regulating pressure on
the outlet pressure gauge (item 7.12).
•
It may be necessary to correct the setpoint of the outlet pressure.
This is done by turning the GPR setpoint setting screw (item 7.22) to the right
or left, in order to increase and decrease the setpoint, respectively, after
removal of the GPR sealing cap (item 7.21).
•
After closing the discharge line (item 7.11), a constant closing pressure within
the closing pressure class can be read on the outlet pressure gauge (item
7.12).
•
Slowly open the shut-off valve (item 7.13), close the discharge line (item 7.11)
and read the set regulating pressure on the outlet pressure gauge (item 7.12).
•
It may be necessary to correct the setpoint of the outlet pressure once again.
•
Screw on the GPR sealing cap (item 7.21) again.
Note
Note
*) Acceptance Test Certificate (ATC) available optionally
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