Siemens LMV5 Quick Start Manual page 102

Menu Path Parameter
ColdStartOn
ThresholdOn
StageLoad
StageSetp_Mod
StageSetp_Stage
Params & Display>
MaxTmeMod
LoadController>
Cold Start
MaxTmeStage
ThresholdOff
AdditionalSens
Temp ColdStart
Setp AddSensor
Release Stages
LMV5 QSG Rev 4
U = User O = OEM
S = Service
Activates or deactivates cold start thermal shock protection (low fire hold or ramping cold start), based on
Temp. or Press. for a steam boiler, and Temp for a hot water boiler.
This is the temp / press below which cold start will engage. The value is a % of the current setpoint and it will
float up or down with the setpoint. Range = 0 to 100%, Def / Typ = 20% Note: If the burner is turned on and
the temp / press is above this setting, it will immediately modulate to achive setpoint.
This sets the % load of the "load step" for a stepping cold start. If the burner is to be held at low fire (low fire
hold) until the ThresholdOff value is reached, set at 0%. Range = 0-100%, Def / Typ =10%
For modulating burners, this is how much the temp / press must go up before the next load step is triggered.
This is a % of the current setpoint. Can be set "up, out-of-the-way" if a burner is to be stepped by time only.
Range = 0 to 100%, Def / Typ = 5%
For staged burners, this is how much the temp. / press must go up before the next burner stage is released.
S
This is a % of the current setpoint. Range = 0-100%, Def / Typ = 5%
For modulating burners, this is maximum allowable time for each load step. If the temp. / press. does not
rise enough to trigger the next load before this times out, the next load step will be taken anyway.
Can be set "up, out-of-the-way" if to be ramped on temp. / press. only.
Range = 1 to 63min Def = 3min Typ = 5min
For staged burners, this is how much time can be spent in each stage. As in modulation, this overrides the F t d b thi i h
boiler temperature / pressure, setting StageSetp_mod. Range = 1 to 63min Def = 3min Typ = 5min
If ColdStartOn is activated, this is the temp. / press. when the LMV is released to moulate. The value is a %
of the current setpoint and it will float up or down with the setpoint.
Range = 0 to 100% Def / Typ = 80%
If the additional temp. sensor is used on a steam boiler for cold start (recommended) the type of sensor must
be selected and attached to INPUT terminal X60. Range = Pt100, Pt1000, Ni1000
Displays the temperature being read by the additional sensor. Typically, an additional temperature sensor is
U
used on a steam boiler for cold start.
If a temperature sensor is used on a steam boiler for cold start, a temperature setpoint must be selected to
take the place of the current setpoint (usually Setpoint W1) ThresholdOn, and ThresholdOff percentages will
be based on this value (instead of W1).
S
Range = 0 to 842 degrees F Def = 140 Typ = 300
For staged burners, this enables or disables stages (other than the first stage) to be released during a cold
start.
Sec 4 Pg 46
Descriptions / Notes
h ti b t i h t A i d l ti thi id th
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