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English
Keep the lowest regulator away from the pump
suction port so that it will not be sucked in.
If the installation is outside protect the discharge
pipes, the isolating and check valve, and the elec-
tric controls from frost. Connect the cables to the
overload release or to the control box.
6.2 Hydraulic connections
– Diameter of discharge pipe (11/2”)
– The non-return valve must be connected to the
upper side of the discharge pipe before the full-
bore isolation valve.
– Provide a 4 mm diameter hole on the discharge
pipe before the check valve for a possible vent-
ing following a draining (Fig. 1-2, pos. B).
– Installation of twinned pumps to a collector,
connect each discharge pipes to a check valve
and an isolation valve (Fig. 2).
– Seal pipe connections carefully with appropriate
products.
6.3 Electrical connection
WARNING! Electrical connection should be made
by a qualified electrician. Current national and
local regulations must be observed (e.g. VDE
regulations in Germany).
– The pump must connect to an external main
disconnector. If the pump does not install near
the main disconnector, it must be of the lockable
type.
– Make sure that the electric installation is in com-
pliance with the standard IEC 364 and that the
line power supply has a high-sensitivity earth
fault breaker (max. 30 mA).
For 3 phases pumps, the nominal intensity of the
earth fault breaker (type magneto-thermic or
equivalent) must be chosen according the elec-
trical data indicated on the rating plate.
– The electrical connections have to be done
before the pump is lowered into the sump.
– Check that the type, voltage and frequency of
the electric line power supply complies with the
indications mentioned on the rating plate.
– The pump with single-phase motor is delivered
with a 3 wires cable equipped with a standard-
ised plug (2 earth). Connect obligatory
the cable on a socket with 2 earth.
– The pump with three-phases motor is delivered
with a 4 wires electrical cable without normalized
plug.
It must connect imperatively the cable on a
normalized socket (3 earth) or a power
isolator.
7. Commissioning
7.1 Filling and venting
– Fill up the sump,
– Check that the float switch or the level regula-
tors operate freely.
7.2 Starting
– Make sure that the sump is full of water.
CAUTION! The pump must never run dry. Dry-
running will damage the mechanical seal.
– Open the discharge valve,
– Start the pump,
– The functioning is now controlled automatically
by the float switch or the level regulators.
8. Service
DANGER! Pull the mains plug before checking
the pump!
No special servicing while the pump runs but
cleaning the impeller and draining the oil can be
necessary.
Proceed as follow:
– Separate the pump from the discharge pipe,
– Lift the pump and wash it carefully with clean
water before touching it (bear in mind the risk of
infection).
Cleaning of the impeller:
– Turn the pump upside down, remove the 3
screws of the feet, remove the feet and disman-
tle the cover.
– Avoid removing the impeller for cleaning.
Drain the motor oil:
– Place the pump horizontally,
– Remove the plug A and its seal (Fig. 3, pos. A),
– Drain the oil in a transparent receptacle,
– Check the oil: A possible presence of water
means that the mechanical seal is in bad state
and must be replaced.
Oil Quality: “MOBIL DTE Oil Medium“ or similar.
Quantity: about 0.6 Litre.
WILO SE 09/2018