LMV Series
Technical Instructions
LV5-1000
Menu Path Parameter Default Range Description
51.1
52.2
52.4
LEGEND - Password Access: (U)=User, (S)=Service, (O)=OEM, Shaded = Commonly Used, ** = Must Set, X = Has Function, / = Partial Function
LMV
ReleasecontctVSD (S) closed
open
closed
This sets the behavior of the run / stop dry contact (terminals X73.1 and X73.2) from
postpurge (phase 78) into phase 10 when the VSD is driving to home position (0 RPM). If set
to open, the blower will freewheel after phase 78. If set to closed, the blower speed will be
ramped down according to parameter TimeNoFlame . Typically set to open if VSD does not
have a braking resistor and closed if VSD has a braking resistor.
x x
TolQuickShutdown (O) 10% 0-100%
This sets the percentage of speed deviation from the desired blower speed that will cause an
immediate shut down of the burner. Note: 100% means no quick shutdown (function
deactivated) and is not recommended.
x x
Num Puls per R (S) 3 3-6
This sets the expected number of pulses per motor revolution. This setting depends upon
what type of speed wheel is used.
x x
Standardization (S) deact
activated
deactivated
This starts the standardization process for the motor driven by the VSD. When activated, it
will ramp the VSD up and then down with the air damper open. During this time the LMV52
will correlate a milliamp signal to the peak motor RPM.
x x
StandardizedSp (S) 1 RPM 1-6300 RPM
Shows the motor speed corresponding to a 95% input signal to the VSD / motor combination.
This is automatically set when the VSD / motor is standardized. It can be set manually, but
this is not recommended in most circumstances.
x x
Absolute Speed (U) This displays the real time speed of the blower motor in RPM (tachometer).
x x
Setpoint Output (S) 4..20 mA
0..20 mA
4..20 mA
This sets what the output signal will be to the VSD. It can be set to 4-20mA or
0-20mA.
x x
Setteling T
ime (O)
16
(400ms)
8-200
(200-5000ms)
This sets a filter time or a delay time between when a speed is read from the speed wheel to
when the LMV52 attempts to correct the speed. This feature is in effect during modulation.
Setting is multipled by 25 milliseconds, so a setting of 16 yields 400ms or 0.4 seconds.
x x
PulseValueGas (S) 1 0-999.99999
This sets the number of pulses per unit of gas flow (for use with gas meters having a pulsed
output). Can be set for pulses per cubic meter or pulses per cubic foot.
x x
PulseValueOil (S) 1 0-9999.9999
This sets the number of pulses per unit of oil flow (for use with oil meters having a pulsed
output). Can be set for pulses per gallon or pulses per cubic liter.
x x
Params & Display>
VSD Module>
Configuration
Params & Display>
VSD Module>
Configuration>
Speed
Read Only
Params & Display>
VSD Module>
Configuration>
Fuel Meter
SCC Inc. Page 39 Section 3
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