Safety; Potentially Explosive Environments - Grundfos SEG Serie Montage- Und Betriebsanleitung

6. Safety

Warning
Pump installation in pits must be
carried out by specially trained
persons.
Work in or near wastewater pits must
be carried out according to local
regulations.
Warning
Persons must not enter the installation
area when the atmosphere is explosive.
Warning
It must be possible to lock the mains
switch in position 0.
Type and requirements as specified in
EN 60204-1, 5.3.2.
Warning
When the pump has been installed,
there must be at least 3 m free cable
above the maximum liquid level.
For safety reasons, all work in pits must be
supervised by a person outside the pump pit.
It is advisable to make all maintenance
Note
and service work when the pump is
placed outside the pit.
Pits for submersible wastewater pumps contain
wastewater with toxic and/or disease-causing
substances. Therefore, all persons involved must
wear appropriate personal protective equipment and
clothing and all work on and near the pump must be
carried out under strict observance of the hygiene
regulations in force.
Warning
Make sure that the lifting bracket is
tightened before attempting to lift the
pump. Tighten if necessary.
Carelessness during lifting or
transportation may cause injury to
personnel or damage to the pump.

6.1 Potentially explosive environments

Use explosion-proof SEG pumps for applications in
potentially explosive environments.
Warning
SEG pumps must under no
circumstances pump combustible or
flammable liquids.
Warning
The classification of the installation
site must be approved by the local
firefighting authorities in each
individual case.
Warning
The explosion protection classification
of the pump is CE 0344
IIB T4 X. The classification of the
installation site must be approved by
the local firefighting authorities in each
individual case.
Warning
Special conditions for safe use of SEG
explosion-proof pumps:
1. Bolts used for replacement must be
class A2-70 or better according to
EN/ISO 3506-1.
2. The level of pumped liquid must be
controlled by two stop level
switches connected to the motor
control circuit. The minimum level
depends on the installation type
and is specified in these installation
and operating instructions.
3. Make sure the permanently attached
cable is suitably mechanically
protected and terminated in a
suitable terminal board placed
outside the potentially explosive
area.
4. The thermal protector in the stator
windings has a nominal switch
temperature of 150 °C and must
guarantee the disconnection of the
power supply; the power supply
must be reset manually.
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