4.6 Soundness test of valve train
❏ The valve train soundness test must be carried out with
the ball valve and solenoid valves closed.
Test pressure in valve train: _____________ min. 100 mbar
Waiting time for pressure equalisation: _______ 5 minutes
Test time: ________________________________ 5 minutes
Max. permissible pressure drop: _______________ 1 mbar
(gas train design pressure _____________ max. 500 mbar)
First test phase:
Ball valve up to first valve seat
1. Connect test assembly to test point ➊.
2. Open test point ➋.
Second test phase:
Between the valves and second valve seat
1. Connect test assembly to test point ➋.
2. Open test point ➌.
Third test phase:
Valve train connection parts and gas butterfly valve
1. Fit blanking plate ➀.
(see notes Ch. 7.3)
2. Fit measuring device to test point ➌.
3. Remove blanking plate ➀ once soundness test is
complete.
4. Tighten Torx screws on mixing head.
Note: To carry out an external soundness test, brush
connection points with foam forming agents or
similar, non-corrosive material, or use an
electronic gas detector.
Soundness test
1
st
Test
phase
2
nd
Test
phase
3
rd
Test
phase
➀ Blanking plate
➁ Measuring device (U tube or manometer)
➂ Manual pump
➃ Hose clamp
Test points on W-MF 507
Test point ➊: Pressure into filter (inlet)
Test point ➋: Pressure between V1 and V2
Test point ➌: Gas pressure setting
Test points on multifunction assembly
For the soundness test, the test points must be opened by
loosening the screw in the test nipple.
☞ Close all test points once the soundness test is
completed!
Documentation
☞ The results of the soundness test must be documented
in the service report.
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