Combustion Head Adjustment; Removing The Head Assembly; Reassembling The Head Assembly - Riello RS5F Instrucciones De Instalación, Uso Y Mantenimiento

5.7

Combustion head adjustment

The combustion head leaves the factory set for the minimum
output.
Ignition must be carried out at reduced power and not
exceeding 120 kW.
In order to measure the ignition output:
– disconnect the connector (CN1) on the ionisation probe cable
(see electrical connections on page 7); the burner will fire and
then go into lockout after the safety time has elapsed (3s).
– Perform 10 ignitions with consecutive lockouts.
– Read the total quantity of gas burned on the meter. This
quantity must be equal to or less than:
3
– 0.10 Nm for G20 (natural gas H);
3
– 0.10 Nm for G25 (natural gas L);
3
– 0.03 Nm for G31 (LPG).
The adjustment of the combustion head varies depending on the
burner output.
This is carried out by turning the adjustment screw 6)(Fig. 11)
clockwise or anti-clockwise until the notch on the regulating rod
2) lines up with the outside surface of the head assembly 1).
Fig. 11 shows the head regulating rod set on notch 4.
Example
The diagram (Fig. 12) is indicative and shows the calibration of
the combustion head in relation to the burnt output.
To ensure the burner works efficiently, we suggest adjusting the
combustion head according to the requirements of the specific
boiler.
The burner is installed in a 210 kW boiler. Considering an
efficiency of 90%, the burner must supply around 230 kW; for this
burner output the adjustment should be on notch 4.
5.7.1

Removing the head assembly

To remove the head assembly (Fig. 11) it is necessary to:
 disconnect the connections 3) and 5);
 remove the small tube 4) and loosen the screws 10);
 loosen and remove the screws (7), remove the head holder
assembly (1) by slightly rotating it to the right.
Take care not to change the setting position on
the elbow-bracket (2) when dismantling.
CAUTION
5.7.2

Reassembling the head assembly

Reassemble with the reverse procedure to that described above,
repositioning the head assembly 1)(Fig. 11) as it was originally.
Screw in the screws 7)(Fig. 11) all the way without
locking them. Lock them with a tightening torque
of 3 - 4 Nm.
CAUTION
Check that when operating there are no gas leaks
from the screw housings.
Should the pressure test point 11)(Fig. 11)
ATTENTION
become accidentally loose, we recommend to
correctly fasten it checking that hole (F)(Fig. 11)
placed on the inner side of the head assembly
1)(Fig. 11) is facing downwards.
20141167
Installation
S7801
kcal/h kW
350
290.000
330
270.000
310
250.000
290
270
230.000
250
210.000
230
190.000
210
170.000
190
150.000
170
130.000
150
0
16
GB
2 4 6
Notch
Fig. 11
D6235
8 10
Fig. 12