Siemens LMV5 Quick Start Manual page 116

Sequence Diagrams 4-3
The Siemens LMV5 BMS can perform a number of different burner sequences based upon how certain parameters are set. Although there
are a number of parameters that affect small aspects of the burner sequence, the main parameters that affect the sequence are parameters
FuelTrainGas or FuelTrainOil.
These parameters set the framework of the sequence, and are based upon the fuel train diagrams in Section 4-1. The OEM has the option of
selecting one of three different gas trains with their associated sequence diagrams, and one of three different oil trains with their associated
sequence diagrams.
The sequence diagrams and fuel train diagrams for Direct Spark ignition with Heavy oil have been omitted. The sequence diagrams in Section
4-3 illustrate when input and output terminals are expected to be energized or de-energized. A legend on the bottom of each page describes
the various symbols used in the diagrams. The last diagram describes what positions the attached actuators are expected to achieve at the
various phases. This diagram also outlines the method that is used to check the actuators position during each phase.
Notes:
1) Only one fuel select terminal can be energized. If both terminals are energized, the LMV5... will go into Lockout.
If no terminals are energized, fuel selection is internal, though the AZL5 (FuelSelect) or through the ModBUS.
2) The burner on / off switch can be disabled with parameter InputController.
If activated, this terminal needs to be energized to have the LMV5.. start its sequence.
3) If a LMV51 is used, the only options are CPI (Closed Position Indication) Gas and PS-VP. CPI oil is possible through the use of a time
delay relay. (See Section 3-3) With an LMV52.., PS-VP, CPI gas, CPI oil, or CPI gas + CPI oil are possible.
4) The alarm can be silenced through the AZL. This alarm silence resets when the LMV5 is reset or restarted.
5) When using an LMV52.., continuous pilot is possible (ContPilotGas/ContPilotOil).
6) If parameter GasPressureMin is set to activated, the low gas pressure switch is expected to remain closed during phase 21-50 of LO w
Gasp, ensuring adequate gas pressure for the pilot. If GasPressureMin is set to Deact x OGP mode, the low gas pressure switch is
expected to remain closed only when firing gas. The Deact x OGP feature is only offered on the LMV52.
7) If parameter OilPumpCoupling is set to Magnetcoupl, the output for the oil pump can be energized in Phase 22 or in Phase 38, depending
upon how parameter IgnOilPumpStart is set. If parameter OilPumpCoupling is set to DirectCoupl, the output will energize with the blower
and de-energize 15 seconds after the blower de-energizes.
LMV5 QSG Rev 4 Sec 4 Pg 60 www.scccombustion.com