Close any gas isolation valves.
Once Pre-pur
ging is complete the system will pause in phase 36, the ignition
position phase. Ratio values for P0 will be displayed and ignition will commence if
the plus arrow is pressed. DO NOT IGNITE THE BURNER BY PRESSING “+”
UNTIL the air and gas pressure switches and air valve values are adjusted to be
correct.
The screen below should be displayed.
The left number represents the current setting for fuel damper valve opening in
P0
and the right number represents the same for the air damper valve.
The fan will be running and the VSD speed can be viewed and adjusted by holding F and A
and using - or + to adjust.
The air and fuel damper valve values may be adjusted by holding F or A
respectively and using - or + to adjust.
14.
Air damper valve settings across the range P0-P9 are gathered by creating a
negat
ive pressure of 5 mbar in the intake chamber for each VSD
speed
cor
responding to P1-P9. The LMV is factory set to the FaT document.
Fine Tuning for each boiler when being commissioned on site may be
required. If required, use the controls illustrated in step 10 to adjust
the air damper valve.”
15.
With the burner still running at P0 pre-ignition phase with the VSD speed pre-set,
the air pressure switch may be set by slowly turning it up from its minimum setting
until the switch output becomes low and the system fails, this should occur with t
he
sw
itch set to around 1mbar, the AZL2 should display alternating screens illustrated
below,
det
ermining an error code 3 diagnostic 0 meaning and air pressure switch failure off
as expected. The switch should now be turned down by around 0.5 mbar to become
its final setting. To dismiss the error code and unlock the LMV the enter key should
be pressed and held for 2 seconds.
The below illustrated screen should be displayed again.
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