Bartscher MFG 7340, Instruction Manual

Page: 52 / 172

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Changing the gas type / settings
•
The device is designed and certified for operation with the gas type specified
on the rating plate (natural gas).
•
When required, it may be adapted to different gas type with use of special
nozzles and settings. The delivery range includes nozzles for LPG.
•
Change of gas type must be performed by the qualified gas installer.
a) Replacement of main burner nozzle
•
Remove all adjustment knobs and disconnect the control panel from the device
in order to obtain access to the brackets of the nozzles.
•
Remove the bolt fixing the nozzle bracket.
•
Replace the removed nozzle with the one designed for a given gas type (nozzle
data are in table 2 “Nozzle and burner properties” on page 43). Tighten the
nozzle.
•
Modify all burners according to the above instructions.
b) Replacement of ignition burner nozzle
Access to the ignition burner is possible only after removing the control panel.
Remove the closing nut from the ignition burner and replace or adjust nozzles
of the ignition flame accordingly to the gas type.
c) Primary air adjustment (fig. 2)
When the primary air is adjusted correctly the flame is
stable, so there will be no interruptions when the burner is
cold or back burning when the burner is hot.
The provided distance (“X”) for the primary air setting is
specified in fig. 2 and in table 2. After the replacement of
nozzles check setting of primary air for all burners.
Fig. 2
d) Ignition burner adjustment
Adjust the ignition burner and see if the flame is correct and covers the thermal
element. If not, see if correct nozzles are installed (table 2, page 43).