Mains Connection - Wilo Medana CV1-L Notice De Montage Et De Mise En Service

7.3

Mains connection

Installation and operating instructions Wilo-Medana CV1-L
Installation and electrical connection
WARNING
Risk of accident due to hot surfaces!
The pump must be installed in such a way that no one can touch the hot surfaces of
the product when it is in operation.
WARNING
Risk of tipping
Ensure that the pump is secured to a flat, rigid surface.
CAUTION
Risk of foreign matter in the pump
Ensure that all blanking plugs are removed from the pump housing before installa-
tion.
NOTICE
Each pump may have been factory-tested to verify its hydraulic performance, and
water may be present in the product. For hygiene purposes, the pump should be
rinsed before use.
Install insulating material (cork or reinforced rubber) under the pump to avoid noise
pollution and vibrations being transmitted to the installation.
CAUTION
Risk of damaging the pump
Tightening of screws or bolts must not exceed:
Connections PN 16 = M10 - 20 N.m
Connections PN 25 = M12 - 30 N.m
The use of an impact wrench is prohibited.
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The flow direction of the fluid is indicated on the pump housing (Fig. 7 [8]).
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The weight of the piping should not be borne by the pump (Fig. 8).
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Permitted pump installation positions (Fig. 5).
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We recommend installing gate valves on the suction and discharge sides of the
pump.
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Use expansion joints to mitigate noise and vibration from the pump if required.
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The pipe cross-section must be at least equal to the diameter of the suction open-
ing.
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The installation of a non-return valve in the discharge pipe is recommended to pro-
tect the pump against pressure surges.
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If connected directly to the public drinking water mains, the suction pipe socket
must also be fitted with a non-return valve and a stop valve.
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If connected indirectly via a tank, the suction pipe socket must be fitted with a suc-
tion strainer to stop impurities from entering the pump, and a non-return valve.
en
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