General - Siemens LMV51 Series Basic Documentation

General

Siemens Building Technologies
HVAC Products
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 if, in the case of plants with continuous operation, flame
detector type QRI... (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).
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. SLT)
· 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 yes, the correct leakage rate is to be checked. For details, refer to chapter «Gas valve
proving».
In the case of dual-fuel burners, short preignition_Oil (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 will be increased in Phase 38 before
ignition takes place.
Pure oil burners do not require a magnetic clutch, in which case long preignition_Oil
(from Phase 22) is to be parameterized.
It must be made certain that all safety notes and the notes on mounting, electrical
installation and service according to the above mentioned Data Sheets are complied
with.
Basic Documentation LMV51...
10 Duties of the authorized inspector
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CC1P7550en
29.05.2002