Extra Functions Of The Lmv5; Valve Proving (Leakage Test Lt) - Siemens LMV51 Series Basic Documentation

27. Valve proving (leak-
age test LT)
Menu level 1 Menu level 2
Params & Display
BurnerControl
Example of fuel train
Legend
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HVAC Products

8.1.4 Extra functions of the LMV5...

Menu level 3
ValveProving
The gas volume contained in the piping between the valves (including the valve vol-
ume) must be calculated in accordance with the gas train.
G
Program
SV
Determination of the test time with predefined leakage rate to be detected during
valve proving:
(P G - P w )
⎯⎯⎯⎯⎯⎯⎯⎯⎯
t Test =
P atm
Determination of the detected leakage rate during valve proving:
(P G - P w )
⎯⎯⎯⎯⎯⎯⎯⎯⎯
Q Leck =
P atm
Q Leck in l / h Leakage rate in liters per hour
P G in mbar Overpressure between the valves at the beginning of the test phase
P W in mbar Overpressure set on the pressure switch (normally 50 % of the
gas inlet pressure)
P atm 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
Basic Documentation LMV5...
8 Commissioning instructions for the LMV5... system
Menu level 4
ValveProvingType
Config_PM-VP/CPI
VP_EvacTme
VP_TmeAtmPress
VP_FillTme
VP_Tme_GasPress
Direct ignition
V1
PS PS
min VP
V 3600
• •
Q Leck
•
V 3600
• •
t Test
•
Menu level 5 Menu level 6
V2
PS
ACT
max
7550s01E/0202
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CC1P7550en
13.08.2004