Dru MAESTRO Umbauinstruktionen Seite 10

CONVERSION INSTRUCTIONS
4
5
38C-1108
Fine adjustment jet
Take the cover off the gas control
block by unscrewing the screw (I).
Now remove the fine adjustment jet
(J). Fit a new fine adjustment jet and
tighten well. Replace the cover.
Remark: If you cannot reach the pilot
light burner properly, remove the
entire burner unit.
• Remove the 3 self-tapping screws
(D)
• Take the burner unit out of the
appliance. Handle the burner unit
carefully: the long gas supply pipe
means it is easily damaged.
Adjusting the burner pressure
Reconnect the gas supply to the
heater, if necessary, and turn the new
3
gas supply on.
Ignite the pilot light and turn the
thermostat to the highest setting.
The gas control block has two points
of pressure measurement where the
burner pressure and the pre-
pressure can easily be checked with a
manometer.
Unscrew the screw (K) at the point
of pressure measurement and
connect the manometers.
When converting to propane, adjust
the burner pressure with the
pressure regulating screw (L), as
shown in the table. Check that the
pre-pressure corresponds with the
pressure given in the table (pag.35).
If you had taken the burner unit out
of the appliance, put it back in place.
Make sure that the burner mounting
plate slides into the rail (M) of the
combustion chamber.
Finally, affix a new type plate.
Reconnect the wiring, replace the
vermiculite trays and fit the glass
pane and front.
If this appliance is to be used with
G31 (propane) do not sprinkle any
embers or chips on top of the ver-
miculite on the burner as this can
cause soot to accumulate.
10