Kessel Comfort PLUS SD Einbau- Und Betriebsanleitung Seite 31

4.4 Ensure ATEX requirement
ATEX pump connection with equipotential bonding
The following additional requirements must be taken into account for the electrical installation so that the pumps may be
operated in a potentially explosive atmosphere.
Cable cross-section
The mains cables to the control unit require a minimum cross-section of 6 mm
whichever cross-section is larger (see "Technical data", page 29).
An earthing cable of at least 4 mm
EN 60079-14. The earthing cable is routed between the (self-locking) earthing screw and the screw retainer on the terminal.
To do this, proceed as follows:
Before connecting the pump, check whether the motor protection switch of the control unit is suitable for the power con-
sumption of the pump(s) (see type plate).
This system's ATEX pumps can have a 6 or 9-wire cable. Double assignment of the phases in the control unit is provided
for 9-wire cables.
Printed board connections for the wastewater pump(s) (ATEX)
Route the green-yellow earthing cable from the pump to
the control unit and feed into the control unit via a sepa-
rate cable gland (enclosed).
Set the motor protection switch to the nominal current of
the pump (see type plate of the pump).
U1, V1, W1 (U2, V2, W2 ): Phases
*
PE: protective conductor
T1,T2: temperature monitoring
* Only 9-wire variant
.
** Systems which are to satisfy the ATEX requirement must be connected to terminal block T2 (NOT self-resetting)
010-990
must be connected to the submersible pump for the equipotential bonding according to
2
**
Installation and operating instructions
or according to the required fusing,
2
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