Installation
17
20160778
GB
4.6
Securing the burner to the boiler
Detach the combustion head from the burner (Fig. 8, page 16):
loosen the four screws 3) and remove the cover 1);
disengage the swivel joint 7) from the graduated sector 8);
remove the screws 2) from the slide bars 5);
remove the two screws 4) and pull the burner back on slide
bars 5) by about 4”;
disconnect the wires from the flame rod and the electrode and
then pull the burner completely off the slide bars.
4.7
Combustion head setting
Installation operations are now at the stage where the blast tube
and sleeve are secured to the boiler as shown in Fig. 11.
It is now a very simple matter to set up the combustion head, as this
depends solely on the MAX output developed by the burner.
It is therefore essential to establish this value before proceeding to
set up the combustion head.
There are two adjustments to make on the head:
air and gas deliveries.
In diagram (Fig. 12) find the notch to use for adjusting the air and
the gas.
4.7.1
Air adjustment
Turn screw 4)(Fig. 11) until the notch identified is aligned with the
front surface 5) of the flange.
4.7.2
Gas adjustment
Loosen the 3 screws 1)(Fig. 11) and turn ring 2) until the notch
identified is aligned with index 3).
Tighten the 3 screws 1) fully down.
Example RS 70/M
MAX output = 2200 MBtu/hr
If we consult diagram (Fig. 12) we find that for this output, air must
be adjusted using notch 3)(Fig. 11).
NOTE
Diagram (Fig. 12) shows the ideal settings for the ring 2)(Fig. 11).
If the gas main pressure is too low to reach the maximum output
operation pressure indicated on page 21, and if the ring 2)(Fig. 11)
is not fully open, it can be opened wider by 1 or 2 notches.
Continuing with the previous example, page 21 indicates that for
burner RS 70/M with output of 2200 MBtu/hr a pressure of approx-
imately 2.36 “WC is necessary at test point 6)(Fig. 11).
If the pressure cannot be reached, open the ring 2)(Fig. 12) to
notch 4 or 5.
Prepare a suitable lifting system.
The manufacturer declines
any and every re-
sponsibility
for any possible lifting movements,
different from those indicated in
this manual.
WARNING
The seal between burner and boiler must be air-
tight.
Fig. 11
D2399
AIR
GAS
Fig. 12
Maximum burner output
Notches (Air = Gas)
