22
-
Damage to the mechanical seal may cause lubricant to leak. The lubricant used is classified as WGK 1 (slightly
hazardous to water).
- Endangerments through electric power are to be eliminated (details concerning this, see e.g. the regulations of the
VDE (Association for Electrical, Electronic and Information Technology) and the local energy suppliers).
2.6 Safety notes concerning maintenance, inspection, and assembly works
The operator has to make sure that all maintenance, inspection, and assembly works are carried out by authorised,
skilled, and qualified personnel which are adequately informed by having thoroughly studied the operation manual.
Generally, works on the machine are only to be carried out when the machine is turned off. The procedure of switching
off the machine, which is described in the operation manual, has to be observed at all costs.
Pumps or pump units which convey media that are hazardous to health have to be decontaminated. Immediately
after completion of the works, all safety and protection devices have to be reattached or reactivated.
Before (re)start, the points listed in the chapter initial operation have to be taken into consideration.
2.7 Unauthorised modification of the machine and fabrication of spare parts
Modifications of the machine are permitted only after having consulted the manufacturer. Original spare parts and
accessories authorised by the manufacturer ensure the safety. The use of other parts can lead to the removal of
liability for the resulting damages.
2.8 Unauthorised modes of operation
The operation reliability is only guaranteed, if the machine is used as intended according to chapter 1 – General. The
limit values stated in the data sheet must not be exceeded!
3.
Transport and temporary storage
On principle, the pumps ZFS 71 III 2G EEx d IIB T3 should be lifted and/or transported using the eyelets on
top or the handlebar designed for that purpose. Under no circumstances is the pump to be lifted on the power supply
cable!
For temporary storage and conservation, it suffices if the pumps are stored in a cool, dry, frost-protected and dark
place.
4. Description
4.1 Motors
The pumps ZFS 71 II 2G EEx d IIB T3 are equipped with an AC asynchronous induction motor or a three-phase
asynchronous motor. Temperature sensors, which function as temperature limiters, have been integrated into each
of the three motor windings. If the motor overheats for any reason, the bimetallic contacts respond to this and the
motor is switched off.
The motor is to be restarted solely by hand! However, the motor may only be restarted after an error analysis
has been conducted and the cause of malfunction has been eliminated.
The motors are certified by the BVS - Dortmund and have the following certificates of conformity:
BVS 05 ATEX E 028 X
4.2 Pumps
The pump housing and the impeller are made of grey cast iron; the cutting device, which is located in front of the
impeller on the suction side, is made of a special alloy. This cutting device comminutes suspended soils, so that they
will not enter the pump and choke it. The pumps are equipped with a flange DN 50.
