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7 Installation and electrical connection
Installation and electrical connection should
only be done in compliance with local regula-
tions and by properly skilled personnel.
WARNING! Danger of personal injury!
Follow all accident prevention regulations.
WARNING! Danger of electric shock!
Eliminate any danger from electrical current.
Follow the instructions given by local directives
or general directives [e.g. IEC, VDE etc.] and local
power supply companies.
7.1 Preparations for installation
• Fit all points of consumption with a warning
notice 'Not drinking water!'. This may be indi-
cated in writing or by means of symbols (in Ger-
many: in accordance with DIN 1988, T2, section
3.3.2).
• WARNING! Health hazard from rainwater pene-
trating into the potable water replenishment
reservoir!
If the connecting piece of the replenishment
reservoir (Item 10) (Fig. 1) is below the maxi-
mum water level in the collector tank, a non-
return valve must be installed between the con-
necting piece and the solenoid valve (Item 9).
WARNING! Health hazard!
For safety reasons, at the points of consumption
use only shut-off valves which cannot be oper-
ated by unauthorised persons.
• Provide a dry, frost-free room for installation of
the unit.
• Select an installation location suitable for the size
of the unit and accessibility of the connections.
• Make sure there is enough space for maintenance
work and air supply to the motor (Fig. 8).
• Ensure that the mains power plug of the unit is
accessible at all times.
• Select a wall with adequate load-bearing capacity
suitable for wall-mounted installation.
• Make sure there is at least 1 m between the unit
and the floor.
• Install the unit as close as possible to the collector
tank. Make sure the horizontal section of the suc-
tion line is as short as possible.
• Route the suction line on a constantly rising gradi-
ent.
• The diameter of the suction line should be at least
as wide as the nominal diameter of the suction
connection (1") on the pump.
• Avoid installing valves in the suction line which
would reduce the suction.
• Be mindful of the maximum suction head of the
centrifugal pump. The suction head is made up of
the static head between the pump and the water
level in the collector tank and the head loss due to
the resistance of the complete suction pipe (see
Fig. 7).
• Avoid kinks, bends and diminutions in the suc-
tion-side pipework, as these raise suction resist-
ance and thus the head loss of the suction line.
• Execute all pipe connections with detachable
connections (screwed connections).
24
• Make the suction line pressure-tight and vacuum-
tight.
• Ensure that the suction line does not deform by
the sucking action of the centrifugal pump.
• To guarantee fault-free functioning of the unit, it
is strongly recommended to install a Wilo filter
collector or a Wilo-DuoFilter (accessories)
upstream of the collector tank.
• Provide additional protection for the pump by
means of a foot valve on the suction pipe with a
non-return valve and strainer (mesh width 1 mm)
or a filter, to prevent the pump running empty and
the pipe being blocked.
NOTE: It is recommended to use the floating
extractor with fine suction filter from the Wilo
range in conjunction with a flexible suction line.
NOTE: It is recommended to install a pressure
gauge on the pressure side.
7.2 Wall-mounted installation of the unit (Fig. 8)
• Drill three holes (Ø 12 mm) on a wall with
adequate load-bearing capacity, following the
drilling diagram (Fig. 8).
CAUTION! Danger of damage!
The dowels included with the unit are not suit-
able for fixing to walls of lightweight construc-
tion.
• When fixing to walls of lightweight construc-
tion, obtain suitable fixing hardware from a spe-
cialist retailer.
• When fixing to walls of lightweight construc-
tion, ensure sufficient soundproofing.
• Fix the unit in place with three hanger bolts
(Ø 10 x 120 mm) and dowels (Ø 12 mm) (included
in delivery).
7.3 Installation of water pipelines (Fig. 1)
After wall mounting, establish the following con-
nections:
CAUTION! Danger of damage!
The weight of the pipework can damage the
unit.
• Support pipe weight by means of suitable fixa-
tion.
• Connect all pipes so that they are stress-free.
• Connect the suction line from the collector tank to
the suction port connection (Item 8).
• Connect the pressure line (consumer line) to the
pressure port connection (Item 6).
• Connect the potable water connection to the
connection for potable water supply (Item 5).
• Install the overflow funnel (Item 10) under the
overflow on the potable water replenishment res-
ervoir so that water can flow freely. The distance
between the overflow on the potable water
replenishment reservoir (Item 4) and the overflow
funnel must be at least 100 mm.
WILO SE 01/2009
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