▪
The operator ensures that all maintenance, inspection and installation work is
performed by authorised, qualified specialist personnel who are thoroughly
familiar with the manual.
▪
If maintenance work is carried out in potentially explosive atmospheres, the
operator is responsible for taking all required precautionary measures.
▪
Only carry out work on the pump (set) during standstill of the pump.
▪
The pump casing must have cooled down to ambient temperature.
▪
Pump pressure must have been released and the pump must have been drained.
▪
When taking the pump set out of service always adhere to the procedure
described in the manual.
▪
Decontaminate pumps which handle fluids posing a health hazard.
▪
As soon as the work is completed, re-install and/or re-activate any safety-relevant
and protective devices. Before returning the product to service, observe all
instructions on commissioning.
2.9
Unauthorised modes of operation
Never operate the pump (set) outside the limits stated in the data sheet and in this
manual.
The warranty relating to the operating reliability and safety of the supplied pump
(set) is only valid if the equipment is used in accordance with its intended use.
2.10
Explosion protection
Always observe the information on explosion protection given in this section when
operating an explosion-proof pump set.
Sections of the manual marked by the Ex symbol apply to explosion-proof pump sets
also when temporarily operated outside potentially explosive atmospheres.
Only pumps/pump sets marked as explosion-proof and identified as such in the data
sheet must be used in potentially explosive atmospheres.
Special conditions apply to the operation of explosion-proof pump sets in accordance
with EC Directive 94/9/EC (ATEX).
Especially adhere to the sections in this manual marked with the Ex symbol.
The explosion-proof status of the pump set is only assured if the pump set is used in
accordance with its intended use.
Never operate the pump (set) outside the limits stated in the data sheet and on the
name plate.
Prevent impermissible modes of operation at all times.
2.10.1 Marking
The marking on the pump refers to the pump part only.
Example of such marking: II 2 G c TX
Refer to the Temperature limits table for the temperatures permitted for the
individual pump variants.
An EC manufacturer's declaration is required for the shaft coupling; the shaft
coupling must be marked accordingly.
The motor must be considered separately.
2.10.2 Temperature limits
In normal pump operation, the highest temperatures are to be expected at the
surface of the pump casing, at the shaft seal and in the bearing areas.
The surface temperature at the pump casing corresponds to the temperature of the
fluid handled. If the pump is heated, the operator of the system is responsible for
observing the specified temperature class and fluid temperature (operating
temperature).
The table below lists the temperature classes and the resulting theoretical
!
DANGER
Pump
Shaft coupling
Motor
2 Safety
WKTR
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