Mint_Prepurgegas - Siemens LMV5 Series Technical Instructions

LMV Series
LEGEND - Password Access: (U)=User, (S)=Service, (O)=OEM, Shaded = Commonly Used, ** = Must Set, X = Has Function, / = Partial Function
Menu Path Parameter
Operation O2Ctrl activate (U)
SetLoad (U)
ManualOperation
Autom/Manual/Off (U)
Params & Display>
MinTmeStartRel (S)
BurnerControl>
Times>
TimesStartup1
FanRunupTme (S)
NOTE: There are numerous prepurge time parameters to provide options for purging FGR piping. For boilers without FGR, these times should be set the following way.
PrepurgeTmeGas(Oil) should be set for the desired prepurge time after a normal shutdown. PrepurgeSafeGas(Oil) should be set for the desired prepurge time after a safety shutdown.
PrepurgePt1Gas(Oil) and PrepurgePt3Gas(Oil) should be set to 0.2 seconds so that they are ignored. See below for more detail on each parameter.
Params & Display>
PrepurgeTmeGas (S)
BurnerControl>
Times>
PrepurgeTmeOil (S)
TimesStartup1
MinT_PrepurgeGas (O)
MinT_PrepurgeOil (O)
Params & Display>
BurnerControl>
PrepurgeSafeGas (S)
Times>
TimesStartup1
PrepurgeSafeOil (S)
SCC Inc.
Default Range
activated
deact Activates the O2 trim system. If control automatically deactivates, can be reactivated here.
deactivated
0-100% When in manual mode (see next parameter), this sets firing rate (load). Other parameter
Not Set
S1-S3 settings may limit the maximum achievable load.
1) Automatic - Enables the burner allowing it to respond to setpoints and switch on / switch
off points.
Automatic
2) Burner off - Manually turn the burner off.
Automatic Burner off
3) Manual - Enables the load of the burner to be set with SetLoad . When in manual,
Manual
setpoints and switch on/ off points are ignored. If INPUT X5-03.1 (burner switch) is enabled,
it must be energized for the LMV5 to start, regardless of parameter setting.
When the LMV5 gets a call for heat, this defines the minimum time the LMV5 will hold in
1s 0.2-63s phase 21. Start releases could be made, but the LMV5 will still hold in phase 21 for this
period of time.
Time allowed to let the fan accelerate up to speed before the actuators start driving to
2s 0.2-63s
prepurge.
Prepurge timing begins when actuators / VSD have reached their specified purge positions.
120s
MinT_Prepurg
Total prepurge time (phase 30-34) will be equal to this setting or longer (other prepurge
eGas(Oil) -
time parameters may cause a longer prepurge). This parameter cannot be set less than
63min
120s
MinT_PrepurgeGas or MinT_PrepurgeOil respectively.
20s
Sets the minimum allowable time for PrepurgeTmeGas(Oil) above. This parameter should be
0.2s-63min
set by the OEM for code-required air exchanges of combustion chamber volume.
15s
After a safety shutdown, this time replaces PrepurgePt1Gas(Oil) and PrepurgePt3Gas(Oil) .
20s
MinT_Prepurg The LMV5 will stay in phase 30 for half of this time. Then the LMV5 will progress to phase 34
eGas(Oil) - for half of this time or longer (if PrepurgeTmeGas(Oil) is set larger than this parameter). This
63min parameter cannot be set less than MinT_PrepurgeGas or MinT_PrepurgeOil respectively.
15s
Setting has no effect on startups after a normal shutdown.
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