Operation Conditions; Explosive Enviroments; Warranty; Transport And Storage - Xylem LOWARA Sekamatik 50 Series Installation, Operation And Maintenance Manual

2.4. Operating Conditions
Maximum liquid temperature: 35°C, short term up to
60°C.
Density of pumped liquid: max. 1100 kg/m
Ph-value of pumped liquid: 5 up to 11.
Operation: The motors are designed for continuous
operation (S1) with fully submerged motor, maximum 15
starts per hour. Our standard warranty and maintenance
regulations refer to intermittent operation. For reduced
warranty periods and service intervals due to continuous
operating conditions please contact our service
department.
2.5. Explosive Environments
For operation of the pumps in explosive environments
only models with explosion-proof motors (Ex model) must
be used.
For each individual installation the explosion
classification (Ex-class) of the pump must be approved by
the local authorities.

3. Warranty

Our warranty only covers pumps which are installed and
operated in accordance with these installation and
operation instructions and accepted codes of good practice
and being used for the applications mentioned in these
instructions.

4. Transport and Storage

Never use the cable, the pump or the pressure
compensation hose to lift, lower or transport the unit.
The unit may be transported and stored in vertical or
horizontal position. Make sure that it cannot roll or fall over.
For longer periods of storage, the unit should be protected
against moisture, frost or heat.

5. Electrical Connection

5.1. General instructions

Before operation, an expert check must secure that the
required electrical protection measures exist. The
connection to ground, earthing, isolating transformer, fault
current breaker or fault voltags circuit must correspond to
the guidelines set forth by the responsible power plant.
The voltage required in the technical data sheet must
correspond to the existing line voltage.
Make sure that the electrical pin-and-socket
connections are installed flood- and moisture-safe. Before
starting operation check the cable and the plug against
damages.
The end of the pump power supply cable must not be
submerged in order to prevent water from penetrating
through the cable into the motor.
The normal separate motor starter/control box of
standard as well as of explosion proof pumps must not be
installed in explosive enviroments.
The electrical connection of the pump should be carried out
in accordance with local requirements.
The operating voltage and frequency are marked on the
pump and controller nameplates. Voltage tolerance: +6%
up to -10% of the voltage stated on the nameplates. Make
sure that the lifting station is suitable for the electricity
supply available at the installation site.
The disposal units are supplied with a control box.
Controller for single-phase pumps also incorporate the
operating capacitors required.
The pump motors have a thermal switch incorporated in the
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motor windings. The thermal switch protects the motor from
overheating by cutting off the supply to the pump via the
controller.
The electrical connection must be carried out in accordance
with the marking on the cable to the controller.
The lifting stations require no additional motor protection.
Connect the units to the mains supply.
An external fault signal device can be connected to the
controller via the potential-free fault signal output. Maximum
load : AC 250 V, 5 A, AC 1.
Motor-Start
The motor of units are designed for direct-on-line (DOL)
start.

5.2. Electronic control box

The equipped electronic control box controls the operation
functions and announces failures which may be occure.

5.2.1. Single station

The function selector offers the following functions:
Operation switch
Position „Manu"
The pump operates, irrespective of the liquid level in the
tank. To stop the pump release the switch. The switch turns
into the position „Aus/Off".
Position „Off/Reset"
The pump is stopped.
Position „Auto"
Pump operation according to the liquid level in the tank.
Switch „Reset"
This switch is used to quit a failure before re-starting the
unit.
Acoustic alarm switch
Position „On"
The built-in acoustic alarm is activated. Together with the
red LEDs "Alarm"and "Failure" the built-in acoustic alarm
will start if the level of the medium is above the alarm level.
The alarm is automatically reset when the liquid level has
been lowered below the alarm level.
Position „Off"
The built-in acoustic alarm is not activated.
The controller front cover features Light-Emitting Diodes
(LEDs) for indication of operating conditions:
Yellow or red LED „Incorrect phase sequence" (only 3-
ph models)
The yellow LED in the front cover of three-phase controllers
indicates wether the phase sequence of the mains
connection is correct. If the LED is illuminated, the phase
sequence is wrong.
Note: This function does not prevent the motor from
starting and rotating in the wrong direction because it does
not measure the phase sequence to the motor.
Therefore, the direction of rotation of three-phase pumps
must always be checked if the cable between pump and
controller has been removed.
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