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8.3.1
Nozzles recommended
Monarch
type R - NS
Delavan
type W - A - E
Steinen
type H - Q
Danfoss
type H - B
Angle 60°: in most cases.
Angle 80°: in case of flame detachment, during ignitions at low
temperatures.
8.4
Pump pressure
Gas oil fuel
8 bar:
the pump leaves the factory set at this value, which is
suitable only for kerosene.
For gas oil increase pressure
12 bar: pressure suitable for gas oil in most cases.
14 bar: improves flame retention; it is therefore suitable for ig-
nitions at low temperatures.
8.5
Combustion head adjustment
This is done when fitting the nozzle, with the blast tube removed.
It depends on the output of the burner and is carried out by rotat-
ing the regulating rod, till the terminal plane of the blast tube is
level with the set-point, as indicated in the Tab. E.
Example:
The combustion head is set for an output of:
– 0.85 GPH at 12 bar (for gas oil)
– or 1.25 GPH at 8 bar (for kerosene).
The shutter is level with set-point 3 (Fig. 17), as required in
Tab. E.
Combustion head settings indicated in the Tab. E are valid for
most cases.
The setting of the fan output according to the installation should
normally be done only through the air damper.
Should one subsequently want to retouch also the setting of the
combustion head, with the burner running, operate on the rod
1)(Fig. 18) with a 6 mm spanner 2) as follows:
TURN TO THE RIGHT: SIGN +
In order to increase the volume of air entering the combustion
chamber and thus diminishing its pressure.
There is a reduction of CO
2
air diffuser disc improves.
(Setting advisable for ignitions at low temperatures).
TURN TO THE LEFT: SIGN –
In order to reduce the volume of air entering the combustion
chamber and thus increasing its pressure.
The CO
improves and the adhesion of the flame to the diffuser
2
tends to reduce.
(This setting is not advisable for ignitions at low temperatures).
In any case do not bring the combustion head setting more than
one point away from that indicated in the Tab. E.
One set-point corresponds to 3 turns of the rod; a hole 3)(Fig. 18)
at its end facilitates counting the number of turns.
Start-up, calibration and operation of the burner
and the adhesion of the flame to the
Kerosene fuel
8 bar:
the pump leaves the factory set at this value.
10 bar: maximum pressure for kerosene.
D5232
D8068
19
GB
Terminal plane of the blast tube
Shutter
2
5
3
1
Regulating rod
Blast tube
2
6 mm
1
Fig. 17
3
Fig. 18
20032178
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