48
2.2.3 Loading Operation
Installation above head and below head
With reference to its position with respect to the water to be pumped, the instal-
lation of the system may be dened “above head” or “below head”. In particular
the installation is dened “above head” when the pump is placed at a level
higher than the water to be pumped (e.g. pump on the surface and water in a
well); vice versa it is “below head” when the pump is placed at a level lower than
the water to be pumped (e.g. overhead cistern and pump below).
Installation “above head”: with a screwdriver, remove the lling cap which,
for the horizontal conguration, is the one on Face F (Fig.1). Fill the system
with clean water through the loading door, taking care to let the air out: to en-
sure optimum lling it is convenient to open also the loading door on Face A
(Fig.1), used for lling in the vertical conguration, so as to let all the air out,
which otherwise could remain trapped in the system; take care to close the
openings correctly once the operation is completed. The quantity of water
with which to ll the system must be at least 0,7 litri almeno. litres. It is recom-
mended to t a non-return valve at the end of the suction pipe (foot valve) so
Figure 10
• Disengage the 4 screws at the corners of the panel using the acces-
sory tool.
• Do not remove the screws completely, just disengage them from the
thread on the product body.
• Be careful not to drop the screws into the system.
• Move the panel away, taking care not to pull on the signal transmis-
sion cable.
• Reposition the panel in its seat at the preferred angle taking care not
to pinch the cable.
• Tighten the 4 screws with the wrench.
Figure 9
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