Siemens LMV5 Series - Determination of VP Leakage Rate

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Siemens Building Technologies Basic Documentation LMV51... CC1P7550en
HVAC Products 4 Burner control 01.10.2003
(P
G
- P
w
) • V • 3600
Q
Leakage
=
⎯⎯⎯⎯⎯⎯⎯⎯⎯
P
atm
• t
Test
Q
Leakage
in l / h Leakage rate in liters per hour
P
G
in mbar Overpressure in the piping section between the valves to be tested, at the
beginning of the test phase
P
W
in mbar Overpessure adjusted on the pressure switch (normally set to 50 %
of the gas inlet pressure)
P
atm
in mbar Absolute air pressure (1,013 mbar normal pressure)
V in l Volume in the piping section between the valves to be tested, including the
volume in the valves themselves, plus any pilot section (Gp1)
t
Test
in s Test time
Refer to chapter «Commissioning instructions for LMV5... system» / gas valve proving /
leakage test.
Determination of VP
leakage rate
Legend
Examples