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The brass threads are housed in technopolymer seats. When
making the connection watertight by adding material (e.g. Teflon,
hemp,...) ensure that the gasket is not too thick: under the action
of an adequate tightening torque (e.g. long handled pipe wrench),
the excess material could exert abnormal force on the technop-
olymer seat, damaging it irremediably.
With reference to its position with respect to the water to be pumped, the
installation of the system may be defined "above head" or "below head". In
particular the installation is defined "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).
If the vertical installation of the system is of the "over head" type,
it is recommended to fit a non-return valve in the suction section
of the system; this is to allow the operation of loading the system
(par. 2.1.2).
If the installation is of the "over head" type, install the suction pipe
from the water source to the pump in such a way as to avoid the
formation of goosenecks or siphons. Do not place the suction
pipe above the pump level (to avoid the formation of air bubbles
in the suction pipe). The suction pipe must draw at its entrance
at a depth of at least 30cm below the water level and must be
watertight along its whole length, as far as the entrance to the
electropump.
The suction and delivery pipes must be fitted so that they do not
exert any mechanical pressure on the pump.
2.1.2.Loading Operation
Installation above head and below head
Installation "above head" (par. 2.1.1): access the technical compartment
and, using a screwdriver, remove the filling cap (Fig.3_point 6). Fill the
system with clean water through the loading door, taking care to let the
air out. If the non-return valve on the suction pipe (recommended in para-
graph 2.1.1) has been placed close to the system entry door, the quantity
of water with which to fill the system should be 0,9 litres. It is recommend-
ed to fit the non-return valve at the end of the suction pipe (foot valve) so
as to be able to fill it quickly too during the loading operation. In this case
the quantity of water necessary for the loading operation will depend on
the length of the suction pipe (0,9 litres + ...).
Installation "below head" (par. 2.1.1): if there are no check valves between
the water deposit and the system (or if they are open), it loads automati-
cally as soon as it is allowed to let out the trapped air. So slackening the
filling cap (Fig.3_point 6) enough to vent the trapped air allows the system
to load completely. You must survey the operation and close the loading
door as soon as the water comes out (however it is recommended to fit a
check valve in the section of the suction pipe and to use it to control the
loading operation with the cap open). Alternatively, in the case where the
suction pipe is intercepted by a closed valve, the loading operation may be
carried out in a similar way to the one described for installation over head.
2.2 - Horizontal Configuration
Screw the 4 rubber feet supplied loose in the package into the brass seats
in face E. Put the system in place, taking into account the dimensions in
Fig.9.
GB
ENGLISH
Figure 9
46
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