Gearbox; Fan; Specifi C For Sf And Xf Axial Fans - Hardi NEPTUN Series Instruction Book

3 - Description

Gearbox

The AG820 and AG920 are fi tted with a 2-speed gear box with a neutral
position. The front and lower area of the gear box are attached to the
chassis. It is fi tted with a speed selector that prevents from jumping out
of gear when engaged.
The speed ratios are following:
1st speed, low gear: 1 – 3.6
2nd speed, high gear: 1 – 4.4

Fan

The axial fan has synthetic impact proof blades resistant to high and low
temperatures as well as chemical products.
The blades have 3 diff erent angle settings to adjust the air fl ow. To
change the angle, see the section 'adjusting the fan'
Specifi c for SF and XF axial fans
After changing pitch, the fan needs to be balanced.
Position P1 (35º) must coincide with C1, in other words the fi rst groove
on the fan blade with the fi rst groove on the crown.
Second position P2 (40º, standard factory setting) must coincide with
C2.
Third position P3 (45º) must coincide with C3.
After changing pitch, the fan must be calibrated, either at the factory, of
by certifi ed shop, under instruction of the factory (HARDI).
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