MBM PLG74T Manual De Uso E Instalación página 38

UPSTREAM DYNAMIC
PRESSURE CONTROL / See gas
inlet pressure detection.
INJECTOR PRESSURE CONTROL
If the measured pressure is
lower than the 20% compared
to the entry pressure, suspend the
installation and contact the authori-
zed customer care service
If the measured pressure is hi-
gher than the entry pressure,
suspend the installation and contact
the authorized customer care service
REPLACEMENT
BURNER INJECTOR - see SECT.
IMAGES - REF. g)
1. Close the cut-off cock upstream the
machine.
2. Demount if necessary, the plugs in
order to avoid to damage it during the
injector replacement (Fig. 2).
3. Unscrew the nut and demount the
pilot injector (the injector is hooked to
the compression fitting).
4. Replace the pilot injector (Fig. 1)
with the one corresponding to the se-
lected gas according to what reported
in the reference Table.
5. Screw the nut with the new injector.
(Fig. 2).
6. Reassemble the plug (Fig. 2).
7. Turn on the pilot burner to check
whether there are no gas leakages.
Make sure there are no gas
leaks
THE PRESENT MANUAL IS PROPERTY OF THE MANUFACTURER. ANY REPRODUCTION, EVEN PARTIAL, IS PROHIBITED.
GAS TYPE CHANGEOVER
REPLACEMENT
INJECTOR - see SECT. IMAGES
- REF. h) / 1. Close the cut-off cock
upstream the machine.
2. Unscrew the injector (Fig. 3)
3. Replace the injector with the one
corresponding to the selected gas
according to what reported in the re-
ference Table.
4. Screw the new injector.
ADJUSTMENT OF MAIN BUR-
NER - see SECT. IMAGES - REF.
i) / For primary air adjustment:
OF PILOT
•
•
•
ADJUSTMENT
THERMAL RANGE - see SECT.
IMAGES - REF. l)
In the provided models, the reduced
thermal range is obtained with the "si-
zed" by-pass minimum screw (Fig. 2),
screwed hard (see Gas Table). Open
the cut-off cock upstream the machine
- 14 -
Make sure there are no gas
leaks
Close the cut-off cock upstream the
machine.
Unscrew the locking screw (Fig. 1).
Where required set the distance (X)
mm of the bushing corresponding
to the selected gas (see Gas Table).
Block the bushing with the
screw and put a tampering de-
tecting seal on it
OF
In case of screw replacement
put a tampering detecting seal
on it at the end of the de-
tection process
OF BURNER
MINIMUM
6.