Siemens LMV 5 Series, Technical Instructions, Page: 148 / 374

Technical Instructions LMV Series
Document No. LV5 ‐ 1000
Section 4 Page 30 SCC Inc.
Special Features and Settings
The LMV5 has special features and settings that are very useful in some situations. Some of these
features are detailed below.
Alarm act/deact An internal alarm silence. Alarm silence will reset when the LMV5 alarm is reset.
MinTmeStartRel Permits the LMV5 to hold in phase 21 for a specified period of time with the start
signal terminal energized. This can be used as a delay to let stack and/or fresh air
dampers open.
PressReacTme Allows the LMV5 to disregard the high and low gas / oil pressure switches for a
settable time period after the main gas / oil valves open. This is used with
automatic reset pressure switches so that pressure spikes due to the main valves
opening will be ignored. This also allows for a reduced delta between switch
setpoints and normal operating pressures. This time can also be reduced to 0.2
seconds, deactivating the feature. Not used with manual reset switches.
NormDirectStart Permits the LMV5 to go from post ‐ purge directly into pre ‐ purge without turning
the blower off. The blower air pressure switch must be checked by using a 3 ‐ way
solenoid valve. The solenoid valve is configured under parameter StartSignal .
ForcedIntermit Shuts the burner down once every 24 hours to cycle and check flame scanner, air
pressure switch, POC, and other safety devices.
DriveLowFire Starts driving to low fire ( StartPointOp ) immediately after main fuel valves open.
Enables less air to be put on the pilot for ignition, and enables a fuel rich light off
without creating excessive CO. Also called "Golden Start" functionality.
StartReleaseGas Configures terminal X7 ‐ 03.2 as a start release for gas, CPI gas, CPI oil, or CPI gas +
oil. Gas and oil POCs can be wired here, freeing up terminal X9 ‐ 03.2 for gas valve
proving. CPI stands for Closed Position Indication, which is essentially the same as
Proof of Closure (POC).
Config_PS ‐ VP/CPI Configures terminal X9 ‐ 03.2 for PS ‐ VP (Pressure Switch ‐ Valve Proving), CPI gas,
CPI oil, or CPI gas + oil. CPI stands for Closed Position Indication, which is
essentially the same as Proof of Closure (POC).
Config X5 ‐ 03 Terminal X5 ‐ 03.3 can be configured to hold the LMV5 in phase 36 (ignition
position). Terminal X5 ‐ 03.2 can be configured to disable O
2
trim.
HeavyOilDirStart Terminal X6 ‐ 01.3 can be used as an input for an external flame relay.
ReacTmeLossFlame Adjustable flame failure response time (FFRT).
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