6
Installation and electrical con-
nection
6.1
Personnel qualifications
6.2
Installation methods
6.3
Operator's obligations
6.4
Installation
Installation and operating instructions Wilo Motor HC 20.1 + EMU FA, Rexa SUPRA, Rexa SOLID
Installation and electrical connection
▪ Rotate the impellers by 180° at regular intervals (3 – 6 months). This prevents jamming of
the bearings and it renews the film of lubrication on the mechanical seal. WARNING! There
is a danger of injury due to sharp edges on the impeller and suction port!
▪ The elastomer parts and coatings become brittle over time. When stored for more than
6 months, customer service must be consulted.
Following storage, clean the dust and oil from the pump and check the coating for damage.
Repair damaged coatings before further use.
▪ Electrical work: A qualified electrician must carry out the electrical work.
▪ Installation-/dismantling work: The technician must be trained to handle the necessary tools
and required fastening materials for the present building site.
▪ Vertical stationary wet well installation with guide system
▪ Vertical portable wet well installation with pump foot
▪ Vertical stationary dry well installation
The following installation methods are not permissible:
▪ Horizontal installation
▪ Locally applicable accident prevention and trade association safety provisions must be ob-
served.
▪ Observe all regulations for working with and underneath heavy suspended loads.
▪ Make available protective equipment and ensure that the personnel wear the protective
equipment.
▪ Observe the local regulations of sewage technology for the operation of sewage systems.
▪ Avoid pressure surges!
Pressure surges may arise in long discharge pipes with pronounced route profile. These
pressure surges could lead to pump destruction!
▪ Depending on the operating conditions and the pump chamber size ensure the cooling time
of the motor.
▪ To allow the product to be fixed securely and functionally, the structural components and
foundations must be of sufficient stability. The operator is responsible for the provision and
suitability of the structural components and foundations!
▪ Check that the available consulting documents (installation plans, layout of the operating
space, intake ratios) are complete and correct.
DANGER
Risk of fatal injury due to dangerous lone working practices!
Working in pump chambers and tight spaces as well as working where there is a danger
of falling is dangerous work. This work must not be carried out alone! A second person
must be present for safety reasons.
WARNING
Hand and foot injuries due to a lack of protective equipment!
During work there is a risk of (serious) injury. Wear the following protective equipment:
• Safety gloves that protect against cuts
• Safety shoes
• If lifting equipment is used, a protective helmet must also be worn.
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