VMP IOM
31
26. You can observe the status of the
burner by going to OperationalStat >
NormalOperation.
27. Verify the flame signal on the display,
measure input if fuel meter is available.
If not, match last elbow pressures and
combustion from test fire sheet. Adjust
the burner as needed. To adjust the
servo position, follow steps 28-29.
SETTING LOW FIRE
NOTE
As soon as a servo position is altered,
the servo will move to that position.
Only change servo settings by a
maximum of 0.5° at a time before
verifying combustion.
28.Go to Params&Display > RatioControl >
GasSettings (or Oil Settings, depending
on the current fuel) > CurveParams.
29.Wait for the spinning line on the left to
disappear. Press Enter. The number 1
should appear to the right of the cursor,
this is the Point Number.
Press Enter once. Select ChangePoint by
pressing the arrow keys to highlight and then
press Enter to select. This will cause the
servo motors to move to this low fire point.
Check combustion and adjust the servo
motors as required. To adjust a servo
motor, arrow to it and press Enter. Then
adjust the setting as required and press
Enter. You can now adjust another servo
motor if needed.
When combustion is properly set for that
point, press Escape once more. If it asks
you to store the point, press Enter. Note the
AZL will only ask to save if either servo
value has been altered.
Low fire is now set and stored.
SETTING THE COMPLETE RANGE
a. Remember it is only necessary to
approximate the setting through the
modulation range until high fire
conditions are established.
b. Press Enter once more to have access
to the point number field. Increase the
point number by one and press Enter.
Select ChangePoint and press Enter.
The servos will now move to that point.
c. Verify combustion is satisfactory.
d. Measure input or monitor last elbow
pressure. Verify that these points are in
general correspondence with the test
fire sheet. Repeat step b. until the point
position has a load value of 100%. You
are now at high fire. Verify combustion is
per test fire sheet.
30.If operating on gas, adjust the incoming
gas pressure at the main gas regulator
to match the test fire report. Adjust the
gas servo motor to change the last
elbow pressure to match the test fire
report. Adjust the air servo motor to
adjust the emissions as needed. If
operating on oil, adjust the oil pump and
air pressure regulator to match the
pressures on the test fire sheet. Adjust
the oil servo until the oil flow rate
matches the test fire sheet. Adjust the
air servo to match the test fire sheet.
31.Repeat step 28 but start at the high fire
point number. Continually decrease the
point number after combustion has
been verified at each point.
32.Once all the points have been verified,
press Escape until you are back to the
main menu.
33.You can observe the status of the burner
by going to OperationalStat >
NormalOperation.
34.Turn the main ON/OFF switch to OFF.
The control will now postpurge.
35.Follow steps 3-20 again to verify ignition
with the new gas pressures.
36.Turn the main burner switch to OFF.
The control will now post purge.
37. Change the operation to Automatic under
ManualOperation > Auto/Manual/Off
and press Enter and confirm Automatic is
entered in the current field.
38.Press Escape twice to get back to the
main menu.
39. Under Updating > ParamBackup,
select LMV51 - AZL. This will store all of
the adjustments that have been made in
the LMV base module to the display. If
the base module were to fail, the display
can be used to download all of the
parameters into a new base module.
40.Press Escape 4 times. Select PW
Logout, the password is now logged out.
41.Press Escape twice. Select
OperationalStat > NormalOperation.
The control is now on the normal
operational display screen.
42.The boiler is now ready to run. Adjust
your setpoint on the temperature control
to the desired temperature and turn the
main ON/OFF switch to ON for the
burner to operate.
BEFORE LEAVING THE INSTALLATION
Check all controls to insure they are
operating properly. Cycle the boiler several
times. Make sure the installation complies
with all applicable codes.
NOTE
Decreasing the primary will typically
decrease the NOx levels. If the primary
is decreased too much, stability may be
compromised.
a. Start the boiler and check for stable
combustion at low fire. Refer to the test
fire sheet for acceptable parameters.
b. Adjust secondary servo air/gas if
needed to bring combustion into an
acceptable range. Adjust carefully as
this is the main fuel adjustment.
c. After a stable flame is achieved and the
combustion is within the test fire sheet
parameters, manually and slowly drive
the servo’s motor to high fire insuring
that the combustion readings stay within
the given parameters. Adjust secondary
servo as needed.
d. If the last elbow pressure is above or
below the stated requirement on the test
fire sheet, adjust the combustion air
damper to bring the last elbow pressure
inline. The gas pressure is directly
proportional to the air pressure and
therefore, increasing the air pressure to
the burner will increase the gas input
proportionally.
e. Manually drive the unit back to low fire
and check combustion.
f. If the combustion is outside of the test
fire parameters for the servo, adjust the
secondary.
g. After the unit is brought back into range,
manually drive the unit back to high fire.
h. Adjust secondary air/gas ratio slightly if
needed.
i. Repeat this procedure 2 or 3 times until
you obtain consistency in high and low
fire combustion.
j. In most cases, the primary gas should
only be adjusted if the unit is unstabe at
low fire and/or NOx are not acceptable
at low fire.
Operation
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