Choosing The Nozzle - Ferroli SUN G20 Instrucciones De Uso, Instalación Y Mantenimiento

SUN G20
2.4 Nozzle and Electrodes

Choosing the nozzle

After calculating the necessary fuel flow rate, using the following table, select the nozzle so that at a
pressure of from 16 to 22 bars it delivers the maximum flow rate to burn and at a pressure of from 8 to
12 bars it delivers the minimum one.
For example:
For a boiler with a maximum burning capacity of 176 kW (14.8 kg/h) and a minimum burning
capacity of 140 kW (11.8 kg/h), the right nozzle will be the 3.00 GPH one with a pump setting
of 17 bars for the 2nd stage and 11 bars for the 1st stage.
The nozzle provided can be used when it corresponds to the required flow rate.
If it does not, it should be changed with another one whose delivery is suited to the system.
Oil nozzle flow-rate table
The values given in the table are approximate since it is necessary to bear in mind that the nozzle
deliveries may vary by ± 5%.
Table of spray values
The nozzles are available with different sprays, identified by one or more letters, depending on the
manufacturer. The table shows the most suitable types of spray for the burner.
Cod. 35442633 - 01/2007 (Rev. 00)
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