Baxi LUNA HT 1.280, Installation, Operation And Maintenance Manual

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5.6 Check tightness
Danger! Danger of life from gas!
The entire gas inlet pipe, particularly the joints must be checked for leakages befo-
re commissioning.
The gas burner valve on the gas burner must be pressure- tested at maximum of
150 mbar .
De-airing gas line
The gas line has to be purged before commissioning. For this, open the measuring
nozzle for the connecting pressure and purge by observing the safety precautions.
Check for tightness of the connection after de-airing!
5.7 Factory settings
- Gas type LL (natural gas L with Wobbe index W
oN
= 12.4 kWh/m
3
or
- Gas type E (natural gas E with Wobbe index W
oN
= 15.0 kWh/m
3
The set gas type can be seen on the affixed label on the burner. The data, set by
the manufacturer, has to be checked with the local supply conditions before insta-
lation of the Power HT. The gas pressure controller of the gas valve has
been sealed.
Liquid gas design
Note: The cause may be lack of gas in case of the fault message "133” (see fault
code table); therefore, the liquid gas tank must be checked for content.
5.8 CO2 -Content
The CO
2
content in the exhaust gas must be checked during commissioning and
during regular maintenance of the boiler, as well as, after reconstruction work on
the boiler or on the exhaust gas system.
CO
2
-content during operation see section Technical data.
Caution! Risk of damage of the burner!
Too high CO
2
-values can lead to incomplete combustion (high CO-values) and da-
mage to the burner.
Too low CO
2
-values can lead to ignition problems.
The CO
2
-value is set at the gas valve by adjusting the gas pressure (see Fig. 7 ).
In case of employment of thePower HT in areas with fluctuating natu-
ral gas composition, the CO
2
-content should be adjusted in accordance with the
Wobbe Index at any given time (ask the gas supply company).
The CO
2
-content to be set can be decided as follows:
- CO
2
-content = 9,3 - (W
oN
- W
ocurrent
) * 0,5
The air quantity set in the factory must not be changed.
5.9 Changing over from LPG to
natural gas and vice versa
Danger ! Danger of injury by explosion!
The gas type of the Power HT must only be modified by an approved
heating specialist.
To change to other type of gas only the CO
2
- content must be reset by adjusting
the jet pressure on the gas valve (see Fig. 7 ).
Installation
34 358 436 08.10