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• Accessories for transportable wet sump installa-
tion (e.g. hose couplings, hoses, etc.),
• Accessories for stationary wet sump installation
(e.g. check valves, non-return valves, etc.).
The use of new accessories is recommended.
5.
Description and function
5.1
Description of the product (Fig. 1)
The pump can be completely submerged in the
fluid.
The electric motor is protected against the pump
chamber by a lips seal.
The pump is installed on the floor of a shaft. For
a stationary installation, it is bolted to a fixed
pressure pipe or for a transportable installation, it
is connected to a hose connection.
The pumps are commissioned by plugging in the
protective contact plug.
They operate automatically, when the float switch
switches the pump on from a certain water level
«h» and switches it off at a minimum water level
«h1».
In manual mode (float switch in vertical position),
the minimal residual level is «h2».
The motors are equipped with thermal motor pro-
tection, which switches off the motor automati-
cally if it overheats and switches it on again when
it has cooled down. The condenser is integrated in
the single-phase motor.
If the removal of the waste water does not
allow any interruption, a second pump (automat-
ic standby pump), together with the necessary
switchgear (accessory), increases the operating
reliability if the 1st pump develops a fault.
6.
Installation and electrical connection
DANGER ! Risk of fatal injury!
Incorrect installation and improper electrical con-
nections can result in a risk of fatal injury.
The installation and electrical connections should
only be done by properly skilled staff and in com-
pliance with the applicable regulations!
Follow all accident prevention regulations.
Make sure that the electric installation is in com-
pliance with the standard IEC 364 and that the
line power supply has a highsensitivity earth fault
breaker (max. 30 mA).
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 name plate.
The pump is delivered with a 3 wires cable
equipped with a standardised plug (2 poles +
earth). Connect obligatory the cable on a socket
with 2 pole + earth.
6.1
Installation
The pump is designed for stationary or trans-
portable installation.
12
CAUTION! Danger of property damage!
Danger of damage due to incorrect handling.
Only suspend the pump by the strap with the aid
or a chain or rope, never by the electrical or float
switch cable or the pipe/hose connection.
The installation site or shaft for the pump must
be free of frost.
The shaft must be cleared of coarse material such
as rubble before setting up and starting the pump.
The quality of the shaft must guarantee the
unhindered mobility of the float switch.
Installation dimension / shaft dimensions
h max.
h1 min.
h2 min.
380 mm
130 mm
20 mm
ATTENTION!
- In continuous service: h1 min. = 190 mm
The diameter of the pressure pipe (pipe/hose con-
nection) should not be smaller than the pressure
connection of the pipe because of the increased
risk of clogging and greater pressure losses. To
avoid pressure losses, it is recommended that the
pipe connection one number higher is selected.
The attached non-return valve should be installed
if the pump is installed permanently.
Stationary wet sump installation
In the case of a stationary wet sump installation
of the pump with a permanent pressure pipe, the
pump must be positioned and secured so that:
• The pressure pipe connection does not support
the weight of the pump.
• The load of the pressure pipe does not act on the
connecting socket.
• The pump is installed stress-free.
• To protect against any backflow from the public
drainage pipe, the pressure pipe must be taken in
an arc over the locally established backflow level
(usually street level). A non-return valve does not
represent a guaranteed backflow seal.
• Seal the pipe connections to the pressure port
with Teflon tape.
NOTE: Permanent leakage in this area can lead to
destruction of the non-return valve and of the
screwed connection.
Transportable wet sump installation
In the case of a transportable wet sump instal-
lation with hose connection, the pump must be
secured in the shaft to prevent it from falling over
and wandering (e.g. secure chain / rope with slight
pre-tension).
NOTE: When used in a sump without a firm base,
the pump must be put on a sufficiently large
plate or hung from a rope or a chain in a suitable
position.
B min.
450 x 450 mm
WILO SE 11/2021
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