Working; Choice Of Nozzles; Pump Pressure - Riello PRESS 45 N Manuel D'entretien

FASTENING OF THE ELECTRICAL WIRES
All the wires, which have to be connected to the burner terminal
strip (16, fig. 1) shall pass through the fair leads (17, fig. 1), see
fig. 2.
1 - Pre-heating resistances
single phase supply: . . . . . . . . . . . . . . . . . . . .fair lead Pg 21
2 - Motor three phase supply: . . . . . . . . . . . . . . .fair lead Pg 16
3 - Single phase supply and
safety thermostat: . . . . . . . . . . . . . . . . . . . . . .fair lead Pg 13.5
4 - Control thermostat: . . . . . . . . . . . . . . . . . . . . .fair lead Pg 13.5
nd
5 - 2 stage thermostat: . . . . . . . . . . . . . . . . . . .fair lead Pg 13.5
6 - Pre-sheared hole
Further prospective signals or controls can be connected to the burner terminal strip by removing the metal weld-
nuts from the pre-sheared holes and inserting a commun fair lead for the passage and the clamping of the leads.
NOTES
- Carry out a safe earth connection.
- Verify the burner stop by opening the boiler thermostat and the burner lock-out by darkening the photore-
sistance.
4.

WORKING

4.1

CHOICE OF NOZZLES

In case of very heavy oil it is advised to use high wear resistance
nozzles (for instance Monarch F 80 H0).
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 pres-
sure or the nozzles match could be changed.
The pump is set by the factory set at 20 bar
4.3 COMBUSTION HEAD ADJUSTMENT
Turn the screw A, fig. 3 till the set-point, detected from the dia-
gram, is on the line with the washer B, fig. 3.
Fig. 3
D2637
5828
B
Set-point 4
A
5
Nozzle
GPH (45° - 60°)
1.50 + 1.50
1.75 + 1.75
2.00 + 2.00
2.25 + 2.25
2.50 + 2.50
3.00 + 3.00
3.50 + 3.50
3.50 + 4.00
kg/h
GB
Fig. 2
D2676
20 bar 25 bar
kg/h kg/h
18.00 20.30
21.00 23.80
24.00 27.10
27.00 30.50
30.00 34.00
36.00 40.60
42.00 –
45.00 –
D2677
Set-point