Applications And Technical Description; Applications; Product Description; Technical Data - Xylem LOWARA Sekamatik 408 Manuel D'installation, D'utilisation Et D'entretien

carried out on live electrical components, they
should be unplugged from the mains or the main
switch turned off and fuse unscrewed. A motor
protection switch is to be provided.
 Basically, all work on the pump or pump unit
should only be carried out when the pump is
stationary and not under pressure. All parts must
be allowed to return to ambient temperature. Make
sure that no-one can start the motor during such
word. It is essential that the procedure for stopping
the system described in the Operating Instructions
is observed. Pumps or pump systems that carry
media that are dangerous to health must be
decontaminated before being taken apart. Safety
Data Sheets for the various liquids handled.
Immediately the work has been completed, all
safety and protective devices must be replaced or
restarted.
 Under EC machinery Directives, every machine
must be fitted with one or more emergency
command devices by which situations which
represent an immediate danger or which could
later be dangerous can be avoided.
 If the emergency command device is no longer
operated after an emergency "off" switch has been
triggered, this must be maintained by blocking the
emergency command device until it is released
again. It should not be possible to block the device
without this triggering an emergency "off" switch. It
should only be possible to release the device
through an appropriate action; this release should
not start the machine up again – it should only
make it possible to start it up again.
 If the power supply is interrupted or restored after
being interrupted or if it is changed in any other
way, this should not cause any danger (e.g. start
up without control or unexpected, pressure
hammer).

2. Applications and Technical Description

2.1. Applications

The pump station will be installed in building which are
below the sewer level or have not enough natural fall to
the canalisation.
Before the pumping of chemically aggressive liquids, the
resistance of the pump materials must be checked.

2.2. Product Description

Smell-tight and watertight pump station with one or two
pumps. The pump station consists of a collecting tank with
all necessary ports for the connection of inlet pipe,
discharge pipe and air vent.
Collecting- Material
tank
PE 40 Polyethylene
PE 8 Polyethylene
The controllers incorporate contactors, a pc-board with
light-emitting diodes (LEDs ) for indication of operating
condition, relays and a pressure switch. The level switch
is operated by the liquid level in the collecting tank via a
hose.
The LEDs indicate:
- Pump operation (each pump)
- Phase sequence fault (three-phase only)
- Fault (each pump)
- Alarm
1
Volume ) Switch
1
volume )
400 l 220 l
800 l 440 l
8
A thermal switch incorporated in the motor windings will
protect the motor from overheating by cutting off the
supply to the pump via the controller.
A back-up accumulator maintaining the alarm signal in
case of supply failure is available as an accessory. The
accumulator is fitted inside the controller via a plug and
ensures that an alarm can be given within 15 hours after
the electricity supply has been switched off.
The accumulator is fully charged on delivery. The
charging time is approx. 100 hours. The accumulator is
automatically charged when the electricity supply is
switched on.
Note: Used up accumulators must be disposes of in
accordance with local regulations.
Three-phase controllers incorporate a phase monitoring
function which does not, however, prevent the motor from
starting in the event of wrong phase sequence of the
mains connection.
In addition to the LEDs, the controller front cover features:
- Function selector with the positions: 'Test' (manual
operation), 'Aus' (turn off) and 'Auto' (automatic
operation).
- On/off switch for built-in acoustic alarm.
Pump Control (Single station)
When the liquid level in the tank reaches the start level, if
the liquid level continues to rise when the pump is
operating, an alarm is given until the liquid level is lowered
below the alarm level. If the liquid level reaches the stop
level in the tank, the pump will stop.
Pump Control (Twin station)
The control panel automatically ensures an even
distribution of operating hours on both pumps by changing
the starting sequence after each pump stop.
When the liquid level in the tank reaches the start level 1,
one pump is started. If the liquid level rises further and
reaches the start level 2, the other pump is started as
well. This pump will run until its stop level is reached. The
operating pump will stop, when the lowest stop level is
reached.
If the liquid level continues to rise when both pumps are
operating, an alarm is given until the liquid level is lowered
below the alarm level.
2.3. Technical Data (Pumps)
Pump types Motor
output
P2 (kW)
Discharge DN 80, Spherical clearance 70 mm
TP 70 M 13/4 D 0.9
TP 70 M 16/4 D 1,3
TP 70 M 26/4 D 1,9
TP 70 M 31/4 D 2,4
TP 70 V 36/2 D 2,9
Discharge DN 100, Spherical clearance 100 mm
MX 2341-D44 2,6
MX 2444-T54 5,0
MX 2448-T64 6,5
MX 2330-T72 9,5
MX 2335-T82 11,5
2.4. Operating Conditions
Please pay attention to the installation and operation
instruction manual of the installed submersible pump.
Speed Nominal Weight
(rpm) current (A) (kg)
1.450 2,6
1.450 3,4
1.450 5,5
1.450 6,3
2.900 6,3
1.450 6,2
1.450 9,9 113
1.450 13,1 118
2.900 18,8 105
2.900 22,2 110
40
40
66
66
56
71