Installation and electrical connection en
Installation and operating instructions Wilo Motor HC 20.1 + EMU FA, Rexa SUPRA, Rexa SOLID 17
ƒ Impellers must be turned by 180° at regular intervals (3–6months). This prevents
locking of the bearings and renews the lubrication film of the mechanical seal.
WARNING!There is a risk of injury due to sharp edges on the impeller and suction
port!
ƒ Elastomer parts and the coating are subject to natural brittleness. Contact customer
service if the pump must be stored for more than 6months.
After storage, remove any dust and oil from the pump and check the coating for dam-
age. Repair damaged coatings before further use.
6 Installation and electrical con-
nection
6.1 Personnel qualifications
ƒ Electrical work: A qualified electrician must carry out the electrical work.
ƒ Installation/dismantling: The technician must be trained in the use of the necessary
tools and fixation materials for the relevant construction site.
6.2 Installation types
ƒ Vertical stationary wet well installation with suspension unit
ƒ Vertical portable wet well installation with pump support foot
ƒ Vertical stationary dry well installation
The following installation types are not permitted:
ƒ Horizontal installation
6.3 Operator responsibilities
ƒ Observe locally applicable accident prevention and safety regulations of trade asso-
ciations.
ƒ Observe all regulations for working with heavy loads and under suspended loads.
ƒ Provide protective equipment and ensure that the protective equipment is worn by
personnel.
ƒ Observe local sewage technology regulations for the operation of sewage systems.
ƒ Avoid pressure surges!
Pressure surges can occur in long pressure pipes with steep terrain. These pressure
surges can lead to the destruction of the pump!
ƒ Ensure the cooling time of the motor depending on the operating conditions and the
size of the pump chamber.
ƒ Structural components and foundations must be of sufficient stability in order to al-
low the device to be fixed securely and functionally. The operator is responsible for
the provision and suitability of the structural component/foundation!
ƒ Check that the available consulting documents (installation plans, design of the op-
erating space, inflow conditions) are complete and correct.
6.4 Installation
DANGER
Risk of fatal injury due to dangerous lone working practices!
Work in chambers and narrow rooms as well as work involving risk of falling are dan-
gerous work. Such work may not be carried out autonomously! A second person
must be present for safety reasons.
WARNING
Hand and foot injuries due to lack of protective equipment!
Danger of (serious) injuries during work. Wear the following protective equipment:
• Safety gloves for protection against cuts
• Safety shoes
• Safety helmet must be worn if lifting equipment are used!
NOTICE
Use only properly functioning lifting equipment!
Use only properly functioning lifting equipment to lift and lower the pump. Ensure
that the pump does not become jammed during lifting and lowering. Do not exceed
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