Riello RL 70 - Start-up, Calibration and Operation; First Start-up Safety; Burner Calibration Procedures

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26
GB
Start-up, calibration and operation of the burner
7.1 Notes on safety for the first start-up
7.2 Burner calibration
7.2.1 Firing
Set switch 1)(Fig. 26) to "ON".
During the first firing, during the passage from the 1st to the 2nd
stage, there is a momentary lowering of the fuel pressure caused
by the filling of the 2nd stage nozzle tubing. This lowering of the
fuel pressure can cause the burner to lock-out and can some-
times give rise to pulsations.
Once the following adjustments have been made, the firing of the
burner must generate a noise similar to the noise generated dur-
ing operation. If one or more pulsations or a delay in firing in re-
spect to the opening of the fuel solenoid valve occur, see the
suggestions provided on p. 16: causes 34 to 42.
7.2.2 Operation
The optimum calibration of the burner requires an analysis of the
flue gases at the boiler outlet and interventions on the following
points:
• 1st and 2nd nozzles
See the information listed on pag. 17.
• Combustion head
The adjustment of the combustion head already carried out need
not be altered unless the 2nd stage delivery of the burner is
changed.
• Pump pressure (gas oil)
12 bar: this is the pressure calibrated in the factory which is usu-
ally sufficient for most purposes. Sometimes, this pressure must
be adjusted to:
10 bar in order to reduce fuel delivery. This adjustment is possible
only if the surrounding temperature remains above 0°C. Never
calibrate to pressures below 10 bar, at which pressures the cylin-
ders may have difficulty in opening;
14 bar order to increase fuel delivery or to ensure firings even at
temperatures of less than 0°C.
In order to adjust pump pressure, use the relevant screw
5)(Fig. 20 - Fig. 21 on page 22).
• Pump pressure (kerosene)
10 bar: maximun pressure for kerosene.
• 1st stage fan air gate valve
Keep the burner operating at 1st stage by setting the switch 2)
(Fig. 26 on page 26) to the 1st stage position. Opening of the air
gate valve 6)(B, Fig. 27) must be adjusted in proportion to the se-
lected nozzle: the index 1) (A, Fig. 27) must be aligned with the
notch 2) (A, Fig. 27) specified in (Tab. M). This adjustment is
achieved by turning the hex element 2) (B, Fig. 27):
– in rh direction (- sign) the opening is reduced;
– in lh direction (+ sign) the opening increases.
Gas oil
Kerosene
N° = Notch 2)(Fig. 27)
Tab. M
7 Start-up, calibration and operation of the burner
WARNING
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
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
It is advisable to first set the burner for operating
on oil and then for gas.
Execute the fuel exchange when the burner is off.
RL 70 RL 100 RL 130
GPH N° GPH N° GPH N°
5
6
7
8
9
2.0
2.3
2.6
2.7
2.8
7
8
9
10
11
12
13
14
2.0
2.1
2.2
2.4
2.6
2.7
2.8
2.9
10
11
12
13
14
15
16
17
18
19
2.0
2.1
2.2
2.3
2.5
2.6
2.7
2.8
2.9
3.0
RL 70 RL 100 RL 130
GPH N° GPH N° GPH N°
6
7
8
9
10
11
12
13
1.5
1.7
1.9
2.1
2.3
2.5
2.7
3.0
10
11
12
13
14
16
2.0
2.3
2.5
2.7
2.8
3.0
13
14
15
16
18
20
22
22
(1)
2.2
2.5
2.7
3.0
3.5
3.8
4.0
3.8
Fig. 26
Off 1
st
2
nd
12
On
Burner Stage
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