Siemens LMV5 Series Technical Instructions page 134

Technical Instructions
Document No. LV5‐1000
3. Ensure burner switch is off. If the LMV5 is not yet powered, turn on the power to the LMV5.
4. At this point, all safety interlocks that can be checked should be checked in a safe manner. This
includes but is not limited to: low water cut offs, high temperature switches, high gas pressure
switch, low gas pressure switch, proof of closure (POC), etc.
5. Later in the procedure when the burner is running, the rest of the safety interlocks must be
checked in a safe manner. This includes but is not limited to: Air pressure switches, high steam
pressure limits, draft switches, etc.
6. Set parameter ProgramStop to Interval 1, Phase 44. This will stop the burner from progressing
past lighting the pilot. This parameter can be found under the following menu path:
Params & Display > RatioControl > ProgramStop
7. Turn on the burner switch. The burner should drive to pre‐purge (Phase 24), drive to ignition
(Phase 38), light the pilot, and stop in pilot stabilization (Phase 44). If the pilot does not light on
a new installation, there could be air in the gas line. Bleed the air in a safe manner if necessary
and attempt to re‐light the pilot.
8. Once the pilot is lit, tune the pilot by adjusting the ignition position of the air actuator and / or
adjusting the pilot gas pressure regulator, if necessary. Pilot flame should be stable and return a
flame signal of 85% or greater. Ignition positions can be adjusted at this time using the following
menu path:
Params & Display > RatioControl > GasSettings > SpecialPositions > IgnitionPos
9. Once a satisfactory pilot flame is established, set ProgramStop to Interval 2, Phase 52. The
burner should open the main fuel (gas) valves and attempt to light the main flame. The LMV5
should show a flame failure since the manual main fuel (gas) valve is closed.
10. If a flame failure does occur, proceed to reset the LMV5 and open the manual main fuel (gas)
valve. The burner should once again proceed through the startup sequence, light the pilot and
then attempt to light the main flame.
11. If the main flame lights, adjust the ignition position of the gas valve to achieve a safe main
flame. At this time, a calibrated stack gas analyzer should be inserted into the stack and used to
evaluate combustion. If the main flame fails to light, the ignition position of the firing rate
control valve and / or the gas pressure regulator may need to be adjusted to achieve a
combustible mixture at the ignition position. After the combustion has been verified to be safe
with an analyzer, ProgramStop can be left at Interval 2, Phase 52 for boil out or boiler warming
if required.
Section 4 Page 16
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