Securing The Burner To The Boiler; Combustion Head Adjustment - Riello RS 70/E Installation, Use And Maintenance Instructions

5.7

Securing the burner to the boiler

Provide an adequate lifting system of the burner.
Separate the combustion head from the rest of the burner, as in
Fig. 16; proceed as follows:
 loosen the 4 screws 3) and remove the hood 1);
 remove the screws 2) from the two guides 5);
 disconnect the plug 14), unscrew the grommet 15);
 disconnect the socket from the maximum gas pressure
switch;
 remove the two screws 4);
5.8

Combustion head adjustment

At this point of the installation, the combustion head is fixed to the
boiler as shown in Fig. 14.
It is therefore especially easy to adjust, and this adjustment de-
pends only on the maximum output of the burner.
Two adjustments of the head are foreseen:
– air
– gas
In the diagram (Fig. 17) find the notch at which to adjust both air
and central gas/air.
Air adjustment
 Rotate the screw 2)(Fig. 18) until the notch you have found
corresponds with the front surface 1) of the flange.
Installation
 pull back the burner on the guides 5) by about 100 mm;
 disconnect the probe and electrode leads, then unthread the
Once this operation has been carried out:
 fix the flange 9) to the boiler plate, interposing the supplied
 Use the 4 screws supplied, with a tightening torque of 35 ÷
9
1 2 5
D7950
25 GB
burner completely from the guides.
insulating gasket 8).
40 Nm, after protecting their thread with anti-seize products.
The seal between burner and boiler must be air-
tight; after the start-up, check there is no leakage
of flue gases into the external environment.
WARNING
13
13
4
15
14
3
To facilitate adjustment, loosen the screw
3)(Fig. 18), adjust and then lock.
WARNING
12
11
10
L
8
3
Fig. 16
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