Combustion Head Adjustment - Riello RS 70/E MZ Installation, Use And Maintenance Instructions

Installation
4
4.7

Combustion head adjustment

At this point of the installation, the combustion head is fixed
to the boiler as shown in Fig. 13. It is therefore especially
easy to adjust, and this adjustment depends only on the max-
imum output of the burner.
Two adjustments of the head are foreseen:
the air adjustment;
the gas adjustment.
In the diagram of Fig. 17, find the notch at which to adjust
both air and central gas/air.
Air adjustment
Rotate the screw 2) until the notch you have found corre-
sponds with the front surface 1) of the flange.
Important
To facilitate adjustment, loosen the screw 3),
adjust and then lock.
CAUTION
Gas adjustment (RS 70-100-130/E MZ)
Loosen the 4 screws and turn ring 5) until the notch identified
is aligned with index 6).
Tighten the 3 screws 4) fully down.
Gas adjustment (RS 190/E - RS 250/E MZ)
When the burner is installed for maximum burner output
≤ 1300 Mcal/h (approx. 1500 kW) fit the discs 1)-2)(Fig. 16),
supplied as part of the standard equipment, removing the
internal tube 3)(Fig. 16). If the mains gas pressure is low, the
head can be left in the standard set-up, limiting the modula-
tion minimum to 450 Mcal/h (approx. 520 kW).
Example
RS 70/E MZ, burner output = 581 kW.
According to diagram Fig. 17 the gas and air adjustments for
this output are carried out on notch 3.
NOTE
The diagram indicates the optimum adjustment for a type of
boiler according to Fig. 4.
RS 70/E MZ
in progress
10
9
8
7
6
5
4
3
2
1
0
1100 1300
1200 1400
RS 100/E MZ
Maximum output of burner
RS 190/E
RS 190/ E
1500 1700
1600 1800 2000
Maximum burner output
RS 190/E - RS 250/E MZ
1
2
6
5
4
1
D720
RS 130/E MZ
RS 250/E MZ
RS 250/ E
1900 2100 2300
2200 2400 2600
RS 70-100-130/E MZ
1
2
3
D8039
D8084
3
D8040
2500 M cal / h
2800 kW
Fig. 15
2
Fig. 16
Fig. 17
15
GB