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Siemens Building Technologies
Basic Documentation LMV5...
CC1P7550en
HVAC Products
4 Burner control
13.08.2004
(PG - Pw)
•
V
•
3600
QLeakage =
⎯⎯⎯⎯⎯⎯⎯⎯⎯
Patm
•
t Test
QLeakage in l / h
Leakage rate in liters per hour
PG in
mbar
Overpressure
in the piping section between the valves to be tested, at the
beginning of the test phase
PW
in mbar
Overpressure adjusted on the pressure switch (normally set to 50 %
of the gas inlet pressure)
Patm 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