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5
Activation, calibration and functioning
5.1
Notes on safety for the first start-up
The first start-up of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
WARNING
5.2
Factory presetting
The valve leaves the factory with the pressure adjuster regulated
to minimum.
Normally this calibration allows the burner to ignite, it is then ad-
justed as indicated in successive chapters. For the pressure val-
ue to set, refer to the manual "burner train combination" supplied
with the burner.
5.3
Adjustment of the pressure stabiliser
Calibrate the pressure adjuster by rotating the adjustment screw
using a screwdriver: by rotating clockwise there is an increase in
output pressure, by rotating anticlockwise there is a decrease in
pressure.
5.4
Valve adjustment
The slow ignition delivery (valve opening phase) should be ad-
justed, after having unscrewed the cover 5) (Fig. 1, page 4), by
rotating the screw below in the correct direction +/-; the cover it-
self may be used as a tool by turning it upside down.
5.5
Delivery optimisation
Optimal Multibloc functionality is achieved by first using the open-
ing of the valve and then adjusting the stabiliser to achieve the re-
quired delivery.
If this is not obtained, repeat the operation described above.
5.6
Low gas pressure switch adjustment
Calibrate the gas pressure switch 8)(Fig. 1, page 4) by adjusting
the cog of the graduated scale, after having performed all other
burner adjustment with the pressure switch regulated to the start
of the scale.
Let the burner work at the required output.
Close slowly the gate valve until the pressure, measured on the
pressure switch gauge, comes down of 5 - 6 mbar with regard to
the operation value.
Rotate slowly the pressure switch handle until the operation of
the same pressure switch and the resultant burner shut-down.
Open the gate valve completely.
Activation, calibration and functioning
9
GB
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
If the burner goes into lockout without the formation of a flame
when started, check:
the pilot light on the valve comes on
connect a pressure gauge to the pressure test point
(between the valve and the combustion head) and check the
pressure during the lockout, if the pressure is too low, turn
the adjustment screw of the stabiliser clockwise (4, Fig. 1,
page 4) by 1 turn and repeat the firing attempt.
When the nominal desired pressure value has been reached,
close the cover and seal the extremities of the wire leaving the
passing ring short.
The steady state output is progressively reached starting from
the ignition delivery following the action of the hydraulic brake;
the steady state delivery may be adjusted by rotating the ring nut
6) in the appropriate direction + / – (Fig. 1, page 4) after having
loosened the non sealed screw 7).
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