Siemens LMV50 Series Manual page 227

Burner control section
Building Technologies
Fuel train parameterization (G, Gp1, Gp2, LO, HO, LOgp, HOgp, refer to chapter 3 Fuel
train (examples) must be checked prior to commissioning to ensure it agrees with the
fuel trains implemented on the burner and to make certain the valves are correctly
assigned to the valve outputs on the LMV5.
The correct setting of the time parameters, especially the safety and prepurge times
(separately for oil and gas), must be checked.
It must also be checked to ensure that – in the case of plants with continuous operation
– flame detector QRI / QRA7 (or the ionization probe) is used, because only these are
suited for continuous operation.
Further, the function of the flame detector in the event of loss of flame during operation
and with extraneous light during the prepurge time, or in the case there is no
establishment of flame at the end of the safety time, must be checked.
(With the QRI flame detector, generation of an extraneous light signal is achieved by
simulating a flickering flame with an artificial light source). With the QRA7, extraneous
light can be simulated by a lighter or a halogen emitter without UV filter.
The functions of all available or required input messages must be checked, for
example:
∂ Air pressure
∂ Minimum gas pressure
∂ Maximum gas pressure
∂ Gas valve proving or CPI
∂ Minimum oil pressure
∂ Maximum oil pressure
∂ Safety loop (e.g. safety limit thermostat)
∂ Fan contactor contact in at least 2 phases (e.g. prepurge and operation)
It is to be checked whether gas valve proving is activated if required by the application.
If it is, the correct leakage rate is to be checked. For details, refer to chapter Gas valve
proving.
In the case of dual-fuel burners, short PreIgnitionTOil (from phase 38) must be
parameterized when firing on oil, and the oil pump must be equipped with a magnetic
clutch, for example, ensuring that the oil pressure is increased in phase 38 before
ignition takes place. In addition, parameter OilPumpCoupling must be set to
Magnetcoupl.
Burners for oil alone do not require a magnetic clutch, in which case long
PreIgnitionTOil (from phase 22) is to be parameterized, or parameter OilPumpCoupling
is to be set to Directcoupl.
Basic Documentation LMV5...
14 Duties of the authorized inspector
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CC1P7550en
22.05.2018