Extra Functions Of The Lmv5 - Siemens LMV50 Series Manual

27. Valve leak test (valve
proving)
Menu level 1 Menu level 2
Params & Display
BurnerControl
Example of fuel train
Legend
Building Technologies

9.4 Extra functions of the LMV5

Menu level 3
ValveProving
The gas volume contained in the piping between the valves (including the valve
volume) must be calculated in accordance with the type of gas train.
G
Program
SV
Figure 83: Extra functions of the LMV5
Determination of the test time with predefined leakage rate to be detected during
valve proving:
(P G - P w ) • V
t Test = 
P atm Q Leck
•
Determination of the detected leakage rate during valve proving:
(P G - P w )
•
Q Leck = 
P atm t Test
•
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...
9 Commissioning instructions for the LMV5
Menu level 4
ValveProvingType
Config_PS-VP/CPI
VP_EvacTme
VP_TmeAtmPress
VP_FillTme
VP_Tme_GasPress
Direct ignition
V1
PS PS
min VP
• 3600
V 3600
•
Menu level 5 Menu level 6
V2
PS
ACT
max
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CC1P7550en
22.05.2018