Riello ENNE 1400 Mode D'emploi page 47

In case of ignition difficulties, proceed as follows:
Adjust the fuel return pressure between 5 - 8 bar and adapt
the air for a correct combustion.
If there are further difficulties, adjust the combustion head at
minimum at notch 2 - 3, keeping the maximum output adjust-
ment according to the diagram.
Example:
With burner 4500, for modulation from 1.400.000 to 3.400.000
kcal/h you see from the graph: notch l for 1.400.000 kcal/h. notch
6,5 for 3.400.000 kcal/h, with a travel of a 5.5 notches.
CAUTION
To avoid causing knocking, never exceed maximum and mini-
mum aperture positions corresponding, respectively, on cylinder
2)(Fig. 13), to notch 9 with the servomotor at 130° and notch 0
with the servomotor at 0°.
To modify combustion head travel, proceed as follows:
Con-rod 1), which controls drive rod 8) of the combustion head,
is fitted with a slot; when tie-rod 9) is moved towards the outside
of the slot, head travel decreases by about 20 mm (approx. 4
notches).
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If a larger reduction is required, proceed as follows:
With the servo-motor at 0°, slacken screws 5) and push ring 6)
under the variable - profile cam in the direction of the arrow. This
reduces eccentricity and thus decreases travel.
Having established the required travel, fully secure screws 5).
In the previous example (travel of 5.5 notches), travel start-end
must coincide with the required values of 1 and 6.5.
To obtain this, turn hex. sleeve 3) one way or the other after ha-
ving slackened nuts 4).
With the servo-motor positioned at 0°, notch 1) must coincide with
reference surface 10); when the servo-motor is positioned at
130°, it must coincide with notch 6.5.
Having completed the adjustment, fully secure nuts 4) with ball-
joint 9) positioned as shown in the Fig. 13.
Head calibrations are performed with the burner closed and not
operating and with the servo-motor released.
Having completed the adjustment, manually check cam 7) travel
to ensure there is no knocking between 0° and 130°.
9 GB
Fig. 13
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