Unauthorised Modification And Manufacture Of Spare Parts; Operation In Ex-Areas - Wilo Drain TS 50 Serie Einbau- Und Betriebsanleitung

2.2 Staff training
The personnel installing the pump must have the appropriate qualifications for this work.
2.3 Risks incurred by failure to comply with the safety precautions
Failure to comply with the safety precautions could result in personal injury or damage to the
pump or installation. Failure to comply with the safety precautions could also invalidate any
claim for damages.
In particular, failure to comply may lead to problems such as:
Failure of important pump or installation functions with reference to the risk of explosion.
2.4 Safety precautions for the operator
The operator is responsible for ensuring the pumps are designed, installed and operated in
accordance with the relevant national provisions. In cooperation with the competent au-
thorities, the operator must mark off all ex-areas and ensure suitable equipment is in use.
This information must then be recorded in the "Explosion Protection Document".
2.5 Safety information for inspection and assembly
The operator is responsible for ensuring that inspection and assembly are carried out by au-
thorized and qualified personnel who have studied the operating instructions closely. All ap-
pliances must be disconnected from the mains before any service and repair work. Appli-
ances must not be switched on in the ex-area. Special repairs must only be carried out by our
customer service team or other WILO approved units. In the ex-area, never wipe plastic
parts using cloths or similar materials as this creates a risk of electro-static build-up.
The pump must be switched off for all repair work and secured against unauthor-
ised operation.
In order to avoid infection, maintenance work should only be carried out using
suitable protective gloves.
For reasons of safety, maintenance work should only be carried out in the pres-
ence of another person and never in the ex-area.
2.6

Unauthorised modification and manufacture of spare parts

Alterations to the pump or installation may only be carried out with the manufacturer's con-
sent. The use of original spare parts and accessories authorised by the manufacturer will en-
sure safety. The use of any other parts may invalidate claims invoking the liability of the
manufacturer for any consequences.
2.7 Unauthorised operating methods
The operating safety of the pump or installation supplied can only be guaranteed if it is used
in accordance with paragraph 1 of the operating instructions. All values must neither exceed
nor fall below the limit values given in the catalogue or data sheet as this could lead, for
example, to excess temperature.
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Operation in ex-areas

The submersible pump is normally immersed in the flow medium. The pump is driven by an
encased asynchronous motor which is impermeable to pressurised water. In order to carry
away the motor heat it is necessary to keep it submerged continuously.
In addition to the motor protection switch, the motor must also be directly thermally
monitored by the temperature sensor (WSK) on the stator coil.
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