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Siemens Building Technologies
Basic Documentation LMV5...
CC1P7550en
HVAC Products
8 Commissioning instructions for the LMV5... system
13.08.2004
8.1.4 Extra functions of the LMV5...
Menu level 1
Menu level 2
Menu level 3
Menu level 4
Menu level 5
Menu level 6
Params & Display
BurnerControl
ValveProving
ValveProvingType
Config_PM-VP/CPI
VP_EvacTme
VP_TmeAtmPress
VP_FillTme
VP_Tme_GasPress
The gas volume contained in the piping between the valves (including the valve vol-
ume) must be calculated in accordance with the gas train.
SV
V1
V2
Direct ignition
G
Program
7550s01E/0202
ACT
PS
max
PS
min
PS
VP
Determination of the test time with predefined leakage rate to be detected during
valve proving:
(PG - Pw)
•
V
•
3600
t Test =
⎯⎯⎯⎯⎯⎯⎯⎯⎯
Patm
•
Q Leck
Determination of the detected leakage rate during valve proving:
(PG - Pw)
•
V
•
3600
Q Leck =
⎯⎯⎯⎯⎯⎯⎯⎯⎯
Patm
•
t Test
QLeck
in l / h
Leakage rate in liters per hour
PG in
mbar
Overpressure
between the valves at the beginning of the test phase
PW
in mbar
Overpressure set on the pressure switch (normally 50 % of the
gas inlet pressure)
Patm in
mbar
Absolute air pressure
(1,013 mbar normal pressure)
V
in l
Volume between the valves (test volume)
including valve volume and pilot path (Gp1) if present
t Test
in s
Test time
27. Valve proving (leak-
age test LT)
Example of fuel train
Legend