26 …60
MC • Edition 2022.08 • No
. 278 349 R
ev
. -0
27 … 60
12.4 Commissioning / unlocking/ control of the set values
1. Slowly open the shutoff valve on the inlet side per
12.2 “Initial applying pressure during commission-
ing, recommissioning or testing”. The ball valve on
the outlet side remains closed.
4.0 Venting the test section to atmosphere
4.1 If venting fuel gas to test the setting of the FRM or
SAV, use a manual valve connected to a suitable hose
to release the fuel gas to a safe location. Or, if a relief
valve is installed, it might be possible to use it to vent
some or all of the fuel gas for proper testing. Do not
use a test burner for venting, and see 12.1 General
information regarding risks of venting into spaces.
4.2 Pressurizing Test Section
4.3 When the test section must be completely filled with
fuel gas: make sure that the test section is free from
air by using a test burner. Close the stop-cock on the
venting hose.
5.0 Initial Checking of the FRM outlet pressure
5.1 Before initially starting of the equipment, an initial
check of the FRM outlet pressure setting shall be
done.
5.2 To check the outlet pressure setting of the regulator:
5.3 Partially open a manual valve connected to the hose
in 4.0 above just enough to generate gas flow, and
check the set value (outlet pressure) using a pressure
gauge. If necessary, correctly adjust the setting ac
-
cording to section 11.1 Regulator Setting.
5.4 Close the manual valve, remove the hose, insert the
sealing cap A.
6.0 Checking upper(over) response pressure p
do
6.1 SBV installation on the outlet side: block the line
upstream of the SBV.
6.2 Create bypass around the FRM (see below).
6.3 Connect a line between the inlet and outlet side of
FRM using manually operated test/purge valves.
6.4 With both valves closed, slowly open the upstream
valve to charge the bypass line.
3.1
Press the bypass button valve. Check increase in
downstream pressure until setpoint pressure is
achieved. Then stop pressing bypass buton valve.
3.2
Operate hand lever to open the valve.
6.5 Slowly open the downstream valve in the bypass line
and monitor the increase of pressure on the outlet
side using a pressure gauge.
6.6 Avoid inadmissible high pressure on the outlet side.
Stop applying pressure immediately after the SAV
has tripped.
6.7 Once the SAV trips, read the upper (over) response
pressure on the pressure gauge on the outlet side.
6.8 If necessary, correct the SAV set points according to
the specifications in section 11.2 “SAV setting” and
check it again.
7.0 Check of the lower (under) response pressure
p
du
setting.
7.1 Release the pressure in the test section on the outlet
side until the operating pressure is reached.
7.2 Check if gas is available and release it safely in the
atmosphere.
7.3 Monitor pressure drop on the pressure gauge.
7.4 Unlock / reset SAV, if SAV is tripped.
See “3. SAV resetting” in section 12.4.
7.5 Check that all test/purge valves are closed.
7.6 Create a means to safely release the fuel gas in
downstream the SAV into the atmosphere. See
figures below and reference “4.0 Venting the test
section to atmosphere” in section 12.3.
7.7 Slowly vent the fuel gas per “4.0 Venting the test
section to atmosphere”. After the SAV trips, read the
lower (under) response pressure on the pressure
gauge.
7.8 Close the vent valve, remove the hose, insert the
sealing cap.
7.9 Slowly open the shut-off valve on the inlet side.
2. Monitor the pressure rise on the pressure gauge on
the inlet side upstream of the device.
3. SAV resettimg:
