Combustion Head Adjustment - Riello 976 T Installation, Use And Maintenance Instructions

5.10

Combustion head adjustment

At this point of the installation, nozzle and pipe coupling are fixed
to the boiler as in (Fig. 9 on page 15). The setting of the combus-
tion head depends exclusively on the output of the burner in the
2nd stage - in other words, the combined output of the two noz-
zles selected on page 16 is a particularly simple operation.
Turn screw 1)(Fig. 15) until the notch on the sheet 2(Fig. 15) is
level with the plate 3)(Fig. 15).
The RL 34 MZ Model with two 3.00 GPH nozzles and 12 bar
pump pressure.
Find the delivery of the two 3.00 GPH nozzles in (Tab. E on
page 16):
12.7 + 12.7 = 25.4 kg/h
(corresponding to 300 kW).
Diagram (Fig. 16) shows that for an output of 25.4 kg/h the burner
RL 44 MZ needs a combustion head notch regulation 3.
NOTE:
If the pressure in the chamber is equal to 0 mbar, the air must
be adjusted with reference to the hatched line on the dia-
gram (Fig. 16).
Once the regulation of the head has been concluded, refit the
burner 4) (Fig. 9 on page 15) on the guides 3) (Fig. 9 on page 15)
at approximately 100 mm from the pipe coupling 5) (Fig. 9 on
page 15), insert the electrode cables and then slide the burner as
far as the pipe coupling.
Replace the screws 2) (Fig. 9 on page 15) on the guides 3)
(Fig. 9 on page 15).
6420
Notches no.
nd
2 stage fuel delivery kg/h
Installation
Fix the burner to the pipe coupling with the screw 1) (Fig. 9 on
page 15).
On closing the burner on the two guides it is advis-
able to gently pull the high voltage wires outwards
until they are under slight tension.
WARNING
3
2
1
D3910
18 GB
D8872
Fig. 15
Fig. 16