Hydraulic Connections; Loading Operation Installation Above Head And Below Head - DAB E.SYBOX MINI 3 Instructions Pour L'installation Et L'entretien

2.1.1 Hydraulic connections

Make the connection at input to the system through the mouth on Face F marked "IN" in
Fig.6 (suction connection). Then remove the cap using a screwdriver. Make the connection
at output from the system through the mouth on Face F marked "OUT" in Fig.6 (delivery
connection). Then remove the cap using a screwdriver.
All the hydraulic connections of the system to the plant to which it can be connected are of
the threaded female type 1" GAS, made of brass.
If you intend to connect the product to the plant with fittings that have a diam-
eter larger than the normal 1" pipe (for example the ring nut in the case of fit-
tings in 3 pieces), make sure that the 1" Gas male thread of the coupling pro-
trudes at least 25mm from the above diameter (see Fig.7).
< 25
mm
Figure 7
The brass threads are housed in technopolymer seats. When making the con-
nection 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 technopolymer 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 recom-
mended 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).
> 25
mm
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 goose-
necks 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 paragraph 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 recommended 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 de-
posit and the system (or if they are open), it loads automatically 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.
GB
ENGLISH
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