Transformation To Operate With Other Gas Type; Replacing The Main Burners Nozzles; Replacing The Pilot Burners Nozzles; Replacing Important Components - MBM MINIMA Serie Instrucciones Para La Instalación, El Uso Y El Mantenimiento

3.
Shut off the gas valve supplying the unit.
3.1 REPLACING THE MAIN BURNERS NOZZLES (FIG. 1)
- Using a size-12 spanner, unscrew nozzle (U) and replace it with the one corresponding to the selected gas, according to the
indications on Table II Ch. 3.4.
3.2 REPLACING THE PILOT BURNERS NOZZLES (FIG. 2)
- Attention : First remove the spark-plug (Fig. 2 position 5) by unscrewing the nut (Fig. 2 position 8) with a 10mm-spanner.
- Unscrew the nut using a 10mm-spanner (Fig. 2 position 2) and remove the pilot nozzle (Fig. 2 pos. 7).
- Exchange the pilot nozzle (Fig. 2 position 7) with one corresponding with the selected gas, in accordance with the
indications of Table II Ch. 3.4.
- Tighten the nut (Fig. 2 position 2) firmly with a 10mm-spanner.
After replacing the nozzles, apply on the existing label the one supplied with the machine indicating the new type of gas.
4.
The unit should be checked at least twice a year. You must check the burners, the ignition, the interignition, the
maximum and minimum settings.
For any repairs, consult exclusively an authorised assistance centre and ask for original spare parts.
Before carrying out the disassembling of components and their replacement, shut off the gas valve.
Remove the front panel.
Proceed to replace the most important components:
A) Piezoelectric Igniter (on front panel)
- Detach the high-voltage wire from the igniter
- Unscrew the nut with a 27mm-spanner
- Replace the igniter
- Mount everything back by following the reverse order sequence.
B) Pilot spark-plug (Fig. 2 position 5)
- Detach the high-voltage wire
- Unscrew the nut (Fig. 2 position 8) using a 10mm-spanner
- Replace the spark-plug
- Mount everything back by following the reverse order sequence.
C) Thermocouple (Fig. 2 position 4)
We advise you to remove the spark-plug (see position B), since the ceramic part is quite fragile.
- Unscrew the nut (Fig. 2 position 9) using a 10mm-spanner
- Using a 9mm-spanner, unscrew the thermocouple of the safety valve (Fig. 3)
- Mount everything back by following the reverse order.
D) Pilot burner "Targhet" (Fig. 2 position 6)
- Remove the spark-plug (see position B), since the ceramic part is quite fragile.
- Remove the thermocouple by using a 10mm-spanner (Fig. 2 position 4 and 8).
- Remove the gas connection by using a 10mm-spanner (Fig. 3 position 2), being careful not to misplace the nozzle (Fig. 2
position 7).
- Remove the pilot from the burner bracket.
- Change the pilot burner.
- Mount everything back by following the reverse order.
ATTENTION : Tighten the nut firmly (Fig. 2 position 2) and check the gas seal with soap bubbles.
E) Safety Valve knob (Fig. 4)
- Unscrew the gas inlet (5) and outlet (7) connections with a size-19 spanner
- Unscrew the pilot burner inlet (4) with a size-10 spanner
- Unscrew the thermocouple (6) with a size-9 spanner
- Install the new safety valve knob
- Check the idle screw (bypass) (B); it should comply with Table II.
ATTENTION: check the gas sealing with bubble soap.
F) Burner (Fig. 1 position T)
- Disconnect the gas supply pipe (position 0)
- Remove the screws (R) with a spanner of 8 mm.
Now you can replace the burner.
- Mount everything back by following the reverse order.
ATTENTION : Check the gas seal with soap bubbles.

TRANSFORMATION TO OPERATE WITH OTHER GAS TYPE

REPLACING IMPORTANT COMPONENTS

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GB