Siemens LMV51 Series - Page 282

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Siemens Building Technologies Basic Documentation LMV5... CC1P7550en
HVAC Products 19 Addendum 4: LMV52... with O2 trim control and O2 module 13.08.2004
19.10.3 Setting the user-defined type of fuel
If, when firing on gas or oil, the user-defined fuel type is selected, the relevant fuel pa-
rameters must be manually set.
Parameter: V_LNmin
Amount of air required for stoichiometric combustion (λ = 1) [m³ air per m³ gas] or [m³
air per kg oil]. This value is used for calculating O
2 trim control / precontrol.
Parameter: V_afNmin
Flue gas volume «wet» with stoichiometric combustion (λ = 1) in [m³ flue gas «wet» per
m³ gas] or in [m³ flue gas «wet» per kg oil]. This value is used for calculating O
2 trim
control / precontrol or the combustion efficiency.
Parameter: VatrNmin
Flue gas volume «dry» with stoichiometric combustion (λ = 1) in [m³ flue gas «dry» per
m³ gas] or in [m³ flue gas «dry» per kg oil]. This value is used for calculating O
2 trim
control / precontrol or the combustion efficiency.
Parameter: A2
This value is used for calculating the combustion efficiency. It is in compliance with the
definition given in the first BimScHV.
Parameter: B/1000
This value is used for calculating the combustion efficiency. It is in compliance with the
definition given in the first BimScHV. The parameters are set using a resolution of
1/1000. This means that a parameterized value of 8 corresponds to 0.008.
Natural
gas H
Natural
gas L
Propane Butane Fuel oil EL Fuel oil S
V_Lnmin 9.90 8.41 23.80 30.94 11.20 10.73
V_afNmin 10.93 9.43 25.80 33.44 12.02 11.39
VatrNmin 8.89 7.69 21.80 28.44 10.53 10.08
A2 0.66 0.66 0.63 0.63 0.68 0.68
B/1000 9 ≈ 0.009 9 ≈ 0.009 8 ≈ 0.008 8 ≈ 0.008 7 ≈ 0.007 7 ≈ 0.007
Preset fuel
parameters