MBM BRG78A Manuel D'installation Et D'utilisation page 44

REPLACEMENT OF PILOT BUR-
NER INJECTOR - see SECT. IMA-
GES - REF. h)
1. Close the cut-off cock upstream the
machine.
2. Demount if necessary, the plugs in or-
der to avoid to damage it during the injec-
tor replacement (Fig. 2).
3. Unscrew the nut and demount the pi-
lot injector (the injector is hooked to the
compression fitting).
Replace the pilot injector (Fig. 1) with the
one corresponding to the selected gas ac-
cording to what reported in the reference
Table (see Gas reference Tab.).
4. Screw the nut with the new injector.
5. Reassemble the plug.
6. Turn on the pilot burner to check
whether there are no gas leakages.
Make sure there are no gas leaks
REPLACEMENT
INJECTOR - see SECT. IMAGES -
REF. i) / 1. Close the cut-off cock upstre-
am the machine.
2. Unscrew the injector (Fig. 3)
3. Replace the injector (Fig. 1) with the
one corresponding to the selected gas
according to what reported in the referen-
ce Table (see Gas reference Tab).
4. Screw the new injector.
Make sure there are no gas leaks
ADJUSTMENT OF MAIN BUR-
NER - see SECT. IMAGES - REF. i)
For primary air adjustment:
1. Unscrew the locking screw (Fig. 1).
2. Where required set the distance (X) mm
of the bushing corresponding to the se-
lected gas (see Gas reference Tab).
Block the bushing with the screw
and put a tampering detecting
seal on it
BURNER GAS VALVE PRESSURE
ADJUSTMENT - see ILL sect. - REF.
THE PRESENT MANUAL IS PROPERTY OF THE MANUFACTURER. ANY REPRODUCTION, EVEN PARTIAL, IS PROHIBITED.
OF BURNER
- 16 -
GAS TYPE CHANGEOVER
q) / On applicable models (900), adjust
the pressure as described below:
Conversion from methane to G30/31
(29/37 mbar) / Unscrew the protective
cap (Fig. 4/A)
- Tighten the adjustment screw comple-
tely (Fig. 4/B).
- Screw the cap back on (Fig. 4/A).
Conversion from methane to G30/31
(50 mbar) / Unscrew the protective cap
and remove the spring (Fig. 4/A)
- Tighten the adjustment screw comple-
tely (Fig. 4/B).
- Insert the spring supplied and screw
the cap supplied back on (Fig. 4/F +
4/E).
Conversion from
mbar) to methane
- Unscrew the protective cap (Fig.
4/A)4/A)
- Unscrew the screw (Fig. 4/B) and
adjust the pressure by measuring it
directly on the valve, based on the va-
lues shown in the table by type of corre-
sponding gas (see TECHNICAL DATA).
- Screw the cap back on (Fig. 4/A).
Conversion from G30/31 (50 mbar)
to methane / - Unscrew the protecti-
ve cap (Fig. 4/A)
- Unscrew the screw (Fig. 4/B) and
adjust the pressure by measuring it
directly on the valve, based on the va-
lues shown in the table by type of corre-
sponding gas (see TECHNICAL DATA).
- Insert the spring supplied and
screw the cap supplied back on (Fig.
4/D + 4/C)
Apply a tamper-evident seal
and make sure there are no
gas leaks
Open the shut-off valve upstream of the
equipment.
Ignite the pilot burner and the main bur-
ner, following the instructions in the igni-
tion chapter.
G30/31 (29/37
6.