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8
Mechanical installation
Special conditions for safe use of SL1 and
SLV explosion-proof pumps:
1. Make sure the moisture switch 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 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.
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. The sewage pumps have an ambient
temperature range of -20 °C to +40 °C
and a maximum process temperature
of +40 °C. The minimum ambient
temperature for a pump with a
water-in-oil sensor is 0 °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.
8. The control unit must protect the WIO
sensor against short circuit current of
the supply to which it is connected. The
maximum current from the control unit
must be limited to 350 mA.
9. In case of frequency converter usage,
the maximum surface temperature of
the pump can be 200 °C.
10. The WIO sensor is intended for use
only with a galvanically isolated circuit.
11. The lock nut of the cable connector
must only be replaced with an identical
one.
12. The WIO sensor must be connected
according to these installation
instructions.
EX pumps are equipped with a WIO
sensor optionally.
Compliance with the standard EN
60079-14 is a customer responsibility.
WARNING
Body injury
Death or serious
personal injury
- Pump installation in
tanks must be carried
out by specially trained
persons. Work in or
near tanks must be
carried out according
to local regulations.
Persons must not work in the installation
area when the atmosphere is potentially
explosive.
WARNING
Crushing hazard
Death or serious
personal injury
- During installation,
always support the
pump by lifting chains
or place it in horizontal
position to secure
stability.
