Siemens LMV5 Series Technical Instructions page 131
Linkageless burner management system
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NOTE: Make sure that the direction of rotation is set correctly for all actuators at this time,
including the oil actuator. If the direction of rotation must be changed later, the fuel‐air ratio
control curves must be deleted.
8. At this point, the LMV5 alarm can be reset, provided that there is not a call for heat present
(burner switch is off / X5‐03.1 is not energized). Older LMV5 units also require the safety loop to
be closed before the alarm can be reset. The reset can be accomplished via a remote reset
button (if wired) or via the menu path:
OperationalStat > Status/Reset > Press "ESC" then "ENTER" to reset
9. Set actuator home (standby) positions if necessary. Defaults are 0 degrees and 0% VSD. For dual
fuel burners this will need to be done for both fuels. The menu path is:
Params & Display > RatioControl > GasSettings or OilSettings > SpecialPositions >
HomePos
10. Couple actuators to the valves / dampers. Actuators must not torque against mechanical stops
on the valve / damper when at home position. Adjust home positions if necessary.
NOTE: Actuator shaft couplings must compensate for both angular and parallel shaft
misalignment due to the mounting bracket. Solid (rigid) shaft couplings are not acceptable in
most applications, especially when formed or welded mounting brackets are used. Couplings
should have little to no backlash, and are a safety relevant part of a linkage‐less system.
NOTE: Make absolutely certain that when the actuators are at or near 0 degrees (as indicated
on the AZL display) that the valve / damper the actuator is coupled to is in the CLOSED
(minimum flow) position. An exception to this is some back‐flow type oil burners, where a
wide open oil valve will result in minimal flow thru the oil nozzle.
11. With the burner off, stroke each valve / damper through its intended range of motion using the
SQM... actuator that is now coupled to the valve / damper. The menu path to do this is:
Params & Display > RatioControl > GasSettings or OilSettings > CurveParams
(For oil, also go into Curve Settings)
In the Curve Parameters screen, all of the activated actuators for the selected fuel can be
stroked through their intended range of motion. An arrow (>) indicates the actuator is driving to
the set position and a colon (:) indicates that the actuator is at the set position. Verify that no
binding will occur through the intended range of motion. Also note valves / dampers where
wide open is less than 90 degrees.
12. Set special positions for all activated actuators. This will define where the actuators / VSD go for
ignition, pre‐purge, and post‐purge. For dual fuel burners this will need to be done for both
fuels. Special positions can be set using the following menu path:
Params & Display > RatioControl > GasSettings or OilSettings > SpecialPositions
SCC Inc.
Page 13
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Technical Instructions
Document No. LV5‐1000
Section 4
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