High-Fire - 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
Params & Display>
O2Contr/Alarm>
NumMinUntilDeact (S)
Gas/Oil Settings>
O2 Alarm
P Low-Fire (S)
I Low-Fire (S)
Tau Low-Fire OEM (O)
Tau Low-Fire (U)
Params & Display>
O2Contr/Alarm>
Gas/Oil Settings>
P High-Fire (S)
Control Param>
PI
I High-Fire (S)
Tau High-FireOEM (O)
Tau High-Fire (U)
Calc PI again (O)
SCC Inc.
Default Range
If the measured %O2 exceeds O2 MaxValue or goes lower than the O2 Alarm for a time
longer than Time O2 Alarm (O2 exceedances), then the O2 trim will deactivate. If parameter
OptgMode is set to 'O2 Control' during an exceedance, a lockout will occur. If parameter
OptgMode is set to 'ConAutoDeac' during an exceedance, then the O2 trim will temporarily
1 1-5 deactivate (burner keeps running on position control curves). If the measured %O2 comes
back between O2 MaxValue and the O2 Alarm , then the O2 trim will attempt to reactivate.
This parameter determines how many times the O2 trim can deactivate and reactivate. This
parameter is valid only if OptgMode is set to 'ConAutoDeac'. A setting of 1 = no repetitions,
a setting of 5 = 4 repetitions.
Not Set 3-500% Proportional band and integral component for O2 trim response. Automatically set based on
the Tau (delay time) measured at the LowfireAdaptPtNo . Both the P and the I can be
Not Set 0-500s manually adjusted, but this is typically not necessary.
Tau Low-Fire (delay time at low fire) can be manually adjusted here if necessary, but manual
Not Set 1-60s
adjustment is typically not necessary.
This is the delay time that is automatically measured at LowfireAdaptPtNo . Delay time is
the amount of time that a fuel air ratio change at the burner takes to reach the O2 sensor in
Read Only
the stack. The delay time is shorter at high fire and longer at low fire due to gas velocity
through the boiler.
Not Set 3-500%
Proportional band and integral component for O2 trim response. Automatically set based on
the Tau (delay time) measured at high fire (the highest point in the curve). Both the P and
the I can be manually adjusted, but this is typically not necessary.
Not Set 0-500s
Tau High-Fire (delay time at high fire) can be manually adjusted here if necessary, but
Not Set 1-60s
manual adjustment is typically not necessary.
This is the delay time that is automatically measured at high fire (the highest point in the
Read Only
curve). See Tau Low-Fire for explanation.
If Tau High-FireOEM or Tau Low-FireOEM are manually adjusted, then the PI values need to
activated
deact be recalculated based on the new Tau values. Setting this parameter to activated will
deactivated
recalculate the high and low fire PI values.
Page 23
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Description
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Technical Instructions
LV5-1000
LMV
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Section 3