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Building Technologies Basic Documentation LMV5... CC1P7550en
4 Burner control 22.05.2018
4.2.4 Selection of fuel
The type of fuel is selected via the menu on the AZL5.
The selection is only possible when the fuel selector is set to INT (or when no selector
is connected).
Fuel selection is continuously stored via voltage-OFF, so that a valid fuel selection is
present when power returns.
It is only possible to select a fuel via the building automation and control system if the
fuel selector on the LMV5 is set to INT (or when no selector is connected).
Ι
Note!
Fuel selection via BACS should be cyclically repeated.
There is no definition of priorities between fuel selection via BACS and fuel selection
via the AZL5, which means that the selection used is the selection made last.
After fuel changeover, the burner control maintains or changes to standby
( ↑ Normal start). Now, a new start is made (provided there is a request for heat), firing
on the selected type of fuel.
If ↑ Direct start has been parameterized, fuel changeover can also take place upon
shutdown in phase 76. The fan is not switched off.
Selection of fuel on the
AZL5
Selection of fuel via
BACS (Modbus)
Fuel changeover
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