Potentially Explosive Environments; Installation - Grundfos SEG Instrucciones De Instalación Y Operación

6.1 Potentially explosive environments

Use explosion-proof SEG pumps for applications in
potentially explosive environments.
Warning
SEG pumps must under no circumstances
FM
pump flammable, combustible or explosive
liquids.
Warning
The classification of the installation site
FM
must be approved by the local firefighting
authorities in each individual case.
Warning
Special conditions for safe use of SEG
explosion-proof pumps:
1. Make sure the moisture switches and
thermal switches are connected in the
same circuit but have separate alarm
outputs (motor stop) in case of high
humidity or high temperature in the
motor.
2. Bolts used for replacement must be
class A2-70 or better according to EN/
ISO 3506-1.
3. Contact the manufacturer for
information on the dimensions of the
flameproof joints.
4. The level of pumped liquid must be
controlled by two stop level switches
connected to the motor control circuit.
FM
The minimum level depends on the
installation type and is specified in
these installation and operating
instructions.
5. Make sure the permanently attached
cable is suitably mechanically
protected and terminated in a suitable
terminal board placed outside the
potentially explosive area.
6. Sewage pumps have an ambient
temperature range of -20 °C to +40 °C
and a maximum process temperature
of +40 °C.
7. The thermal protection 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.
10

7. Installation

Prior to installation, make sure the pit
Caution
bottom is even.
Warning
Before beginning the installation, switch off
the power supply and lock the mains
switch in position 0.
Any external voltage connected to the
pump must be switched off before working
on the pump.
Warning
Before installation and the first start-up of
the pump, check the cable for visible
defects to avoid short-circuits.
Fit the extra nameplate supplied with the pump at the
installation site or keep it in the cover of this booklet.
All safety regulations must be observed at the
installation site, e.g. the use of blowers for fresh-air
supply to the pit.
Prior to installation, check the oil level in the oil
chamber. See section
10. Maintenance and
The SEG pumps are suitable for different installation
types which are described in sections
and
on auto coupling 7.2 Free-standing submerged
installation.
All pump housings have a cast DN 40 or DN 50, PN
10 discharge flange. The DN 40 flange can also be
connected to a DN 50, PN 10 flange.
The pumps are designed for intermittent
operation. When completely submerged in
Note
the pumped liquid, the pumps can also run
continuously. See section
data.
Warning
Do not put your hands or any tool into the
pump suction or discharge port after the
pump has been connected to the power
supply, unless the pump has been
switched off by removing the fuses or
switching off the mains switch. Make sure
that the power supply cannot be
accidentally switched on.
We recommend to always use Grundfos
Caution accessories to avoid malfunctions due to
incorrect installation.
Warning
Only use the lifting bracket for lifting the
pump. Do not use it to hold the pump when
in operation.
service.
7.1 Installation
12. Technical