Riello GAS 4 P/M, Инструкции по установке, использованию и обслуживанию

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2915246
12 GB
RATIO BETWEEN THE MINIMUM AND MAXIMUM OUTPUT
For a better explanation we suppose to have a burner with an adjustable output between the range 25 - 100. The
ratio between the minimum and maximum output is generally included between 1 : 4 (25 - 100) and 1 : 3 (25 - 75);
our burners leave the factory set for these ratio.
If the ratio should be reduced at 1 : 2 (25 - 50 or 50 - 100) it is advisable to re-adjust the tension rods for the air and
gas and the controlling sector of the gas throttle valve.
CONTROL OF THE GAS THROTTLE VALVE
The tension rod 11) moving the control sector of the throttle valve is
positioned - by the factory - on the hole marked 90° (90° is the moving
angle of the throttle valve when the cam with adjustable profile 6)
covers the complete angle of 130°).
When the ratio between the minimum and maximum output is
approximately 1 : 2, the tension rod shall be positioned on the hole
marked 60° (60° is the moving angle of the throttle valve when the cam
covers 130°).
If the ratio 1 : 2 is in the lower outputs range (25 - 50) the change from
90° to 60° of the tension rod will be sufficient. Should this ratio be in
higher range (50 - 100) in this case, further to position the tension rod
on 60° it shall be shortened.
Proceed as follows:
- Disjoint the articulation from the control sector.
- Screw down the tension rod on the extension.
- Reassemble the articulation on the control sector.
In this way the gas throttle valve - servomotor at 0° - is partially open.
The shortening of the tension rod shall permit the gas flow without
setting the 3rd cam of the servomotor too forward, because in this way
the turn of the cam with adjustable profile would be limited.
CONTROL OF THE AIR DAMPER
The lenght of the tension rod 13) adjusting the air damper can be varied
too.
If the air damper is moving, during the operation, into a reduced angle
(ratio 1 : 2 lower outputs range) it is necessary to extend the tension
rod.
In this way the cam profile is not too much bent.
When the burner is off proceed in this way:
-
Disjoint the articulation 14) of the tension rod 13) from the lever 15).
- Extend the tension rod.
- Manually position the servomotor on 0°.
- Join the tension rod to the lever.
- Move the cam profile till the pointer placed on the air damper shaft
is at 0°.
Throttle valve
control sector
D2188
D2189
D2190