Riello GAS 5 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 length 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°.