Electrical Connections - Wilo TWI 5-SE Mode D'emploi

6. Installation - Mounting
DANGER! Installation and electrical work in com-
pliance with any local codes and by qualified
personnel only !
WARNING! Bodily injury
Existing regulations for the prevention of acci-
dents must be observed.
WARNING! Electrical shock hazard
Dangers caused by electrical energy must be
excluded.
National Electrical Codes, local codes and regula-
tions must be followed.
6.1 Installation
CAUTION! Possible damage of the pump
Do not transport , hang or suspend the pump by
the cable.
- The pump must be installed in frost-free place.
- Fix the rope in the hole of fixing in the superior
part of the pump.
- Connect the delivery pipe work.
- Fix the supply cable without constraint to the
delivery pipe with the appropriate bindings.
- Lower the pump with the help of the cable and
support it so that it is always immersed in water,
maximum depth: 20 m and in suspension.
- The pump can run in a horizontal position.
- To ensure that the well diameter is always con-
stant and allows a free lowering of the unit.
- To centre the pump in the middle of the well.
- To ensure that the pump, the electric cable and
the rope, in operation, could not rubb against the
well sides or any other obstacle.
- In final position, the unit can be hung 0.50 at the
least over the well bottom.
- To ensure that the minimum water height is
always 0.15 m over the suction sieve of the pump
(pump in operation).
- If the installation is in open air, protect the deliv-
ery pipe work, the electric box, valves, flap, elec-
tric controls from frost.
- If a floating tapping device (suction filter with
hose connection) is used take care to ensure that
the length of the hose is adapted to the struc-
tural conditions of the cistern. To prevent air
from entering, the filter basket must no reach
the surface of the water (see Fig. 8).
- The SE-type model can be installed out of water,
because the motor is cooled by the fluid (see
Fig. 7).
- The box delivered with the single-phase pumps
allows the dry run safety through a float switch
adaptation (see § 7.3) or an on-off control
through a pressure switch connection
(see Fig. 4).
- Boxes delivered with the three phase pumps
allows the dry run safety through a float switch
adaptation and an on-off control through a
pressure switch connection (see Fig. 5).
WILO AG 10/2006

6.2 Electrical connections

CAUTION! Possible damage of the pump
During the use of SE pump, fill the section hose
with water before starting the pump (see Fig. 8).
- The pipework diameter cannot be inferior to the
pump's one on rigid threaded steel pipework or a
semi rigid polyethylene high density pipework.
- In the case of a semi rigid pipework the pump
must be supported by a cable fixed to the lifting
ring situated on the discharge casing.
- The installation of a non return valve in pump
outlet and before the isolation valve is obligator.
6.3 Electrical connections
WARNING! Electrical shock hazard
The electrical connections and the inspections
have to be done by a qualified electrician and
comply with the applicable local standards.
- Control the kind of current and the network
voltage.
- Observe the specifications of the pump name-
plate.
- Fuse: 16 A, for line protection
- Not forget the earthing.
- The three-phase pump is delivered with a 20 m
long cable to be connected with a protection
mechanism or a connection box (electrical con-
nection: see installation and operating instruc-
tions of the switching device).
- The electric protection of the pump with three
phase motor is obligatory.
- The pump with single-phase motor is cabled and
delivered with a capacitor box and a thermic pro-
tection. This box has to be connected to the
supply network with the cable provided to that
effect.
- Connection of a float switch or a pressure
switch. Disconnect the pump from the network
before opening the box. Remove the strap and
connect in its place the feed cable of the on/off
switch and the earth cable if provided. Please
refer to the terminal diagram inside the terminal
box for details of the electrical connection.
- Levels regulation : to ensure that in off position,
the water level is always 150 mm minimum over
the suction sieve (see Fig. 3).
7. Starting up
7.1 Sense of rotation
NOTE: The pressure measured at the borehole
outlet with closed valve corresponds to the head
of the pump at zero output minus the height
between ground level and water level.
Single-phase 230 V: No reverse risk
Three-phase 400 V: To determine the right
sense of rotation of the unit, to compare the
delivery pressure, and bear in mind that the right
sense of rotation corresponds to the highest
pressure.
English
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