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Installation
4.7
Adjustment of the combustion head
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 adjustment R1
gas adjustment R2
In the diagram of Fig. 16, find the notch at which to adjust both air
and central gas/air.
4.7.1
Air adjustment
Turn screw 4)(Fig. 17) until the notch identified is aligned with the
front surface 5)(Fig. 17) of the flange.
4.7.2
Gas adjustment
Loosen the 3 screws 4)(Fig. 17) and turn ring 5) until the notch
identified is aligned with index 6).
Tighten the 3 screws 1) fully down.
Example
RS 120/E LN, burner output = 3750 MBtu/hr
If we consult diagram (Fig. 16) we find that for this output the ad-
justments are:
•
air: R1 = notch 2;
•
gas: R2 = notch 5.
Note
Diagram (Fig. 16) indicates an optimal regulation for a type of boiler
seen in Fig. 5, page 11.
If the pressure of gas allows it, by closing ring nut (Fig. 5, page 11)
a reduction of the formation of NOx is obtained.
Continuing with the previous example, (Fig. 23, page 23) indicates
that for burner with output of 3750 MBtu/hr a pressure of approxi-
mately 2.8” is necessary at test point 3)(Fig. 17). If this pressure
cannot be reached, open the ring 5)(Fig. 17) to notch 4 or 5.
Make sure that the combustion characteristics are satisfactory and
free of pulsations.
Fig. 16
D2797
Notch
Burner output
CAUTION
To facilitate adjustment, loosen the screw 3)
(Fig. 17), adjust and then lock.
2
1
3
4
5
6
Fig. 17
D9804
Содержание RS 120/E LN
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