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4.
WORKING
4.1
CHOICE OF NOZZLES
Nozzle
20 bar
GPH (45° - 60°)
kg/h
2.50 + 2.50
30.00
3.00 + 3.00
36.00
3.50 + 3.50
42.00
4.00 + 4.00
48.00
4.50 + 4.50
54.00
5.00 + 5.00
60.00
In case of very heavy oil it is advised to
use high wear resistance nozzles
(for instance Monarch F 80 H0).
4.3
COMBUSTION HEAD ADJUSTMENT
Turn the screw A, fig. 3 till the set-point, detected from
the diagram, is on the line with the washer B, fig. 3.
Fig. 3
D2637
4.4
ADJUSTMENT OF THE AIR DAMPER MOTOR
STOP - Blue lever
This lever leaves the factory vertically positioned and corre-
sponds to the complete closing of the air damper. A partial
opening of the air damper might be obtained by moving left-
wards this lever (+ on the label).
The new position of the air damper is detectable when the burn-
er is off. Do not overcome the position of the orange lever for the
st
1
stage.
st
1
STAGE - Orange lever
The orange lever controls the air damper position for the first
flame, it is adjustable both for opening and closing.
nd
2
STAGE - Red and black levers
The red lever controls the air damper position for the second
flame, it is adjustable both for closing and opening.
The black lever controls the opening of the second oil valve and
it must always anticipate - for a bit - the red lever, but never the
orange one.
5829
25 bar
kg/h
34.00
40.60
47.40
54.20
61.00
–
B
Set-point 4
A
4.2
PUMP PRESSURE
Advised pressure:
- Light oil: 20 bar
- Heavy oil: 25 bar (see modification kit)
Rated deliveries of the nozzles are indicated on the
above list and refer to a light oil having viscosity from
3 to 5°E at 50° C pre-heated at 100°C.
The effective delivery may vary of ± 5% against the
rated one. In case of requirement of intermediate
values, the pump pressure or the nozzles match
could be changed.
The pump is set by the factory set at 20 bar
kg/h
Black lever
Red lever
Orange lever
Blue lever
6
GB
D2693
Set-point
Opening +
– Closing
D2638
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