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

7.1 Potentially explosive environments

Use explosion-proof SEG pumps for applications in potentially
explosive environments.
Warning
FM
SEG pumps must under no circumstances pump
flammable, combustible or explosive liquids.
Warning
The classification of the installation site must be
FM
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. The minimum level depends on the
FM
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 -32 °F (0 °C) to 104 °F (40 °C) and a
maximum process temperature of 104 °F (40 °C).
7. The thermal protection in the stator windings has
a nominal switch temperature of 302 °F (150 °C)
and must guarantee the disconnection of the
power supply; the power supply must be reset
manually.

8. Installation

Caution
Prior to installation, make sure the pit 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,
FM
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
11. Maintenance and service.
The SEG pumps are suitable for different installation types which
are described in sections
8.1 Submerged installation on auto-
and
coupling 8.2 Free-standing submerged
All pump housings have a cast ANSI 1 1/2" (DN 40), PN 10, or 2"
(DN 50), PN10, outlet flange.
The pumps are designed for intermittent operation.
When completely submerged in the pumped liquid,
Note
Note
the pumps can also run continuously. See section
13. Technical data.
Warning
Do not put your hands or any tool into the pump inlet
or outlet 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 that you 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.
installation.
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