Wilo Medana CV1-L Notice De Montage Et De Mise En Service page 29

Installation and operating instructions Wilo-Medana CV1-L
Commissioning
CAUTION
Risk of damage to the pump
Never run the pump dry. The pump must be filled before starting.
CAUTION
Risk of damage to the pump
Observe the tightening torques of the filler screw (Fig. 1 [4]) and drainage screw
(Fig. 1 [5])
Pump in inlet mode (Fig. 1)
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Close the gate valves (pos. 1+2).
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Unscrew the filler screw (pos. 4).
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Slowly open the valve on the suction side (pos. 1).
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Close the filler screw again once the water has exited via the screw port (air re-
moved) (pos. 4).
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Open the valve on the suction side completely (pos. 1).
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Start the pump and verify that the direction of rotation complies with the specifica-
tion printed on the pump label.
CAUTION
Risk of damaging the pump
An incorrect direction of rotation will cause poor pump performance and may dam-
age the coupling.
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Open the valve on the discharge side [3].
Pump in suction mode (Fig. 2)
CAUTION
Risk of damage to the pump
Partially open (7 – 8 mm) the priming/drainage screw [5].
NOTICE
Ensure that the suction pipe does not trap air at the transitions and bends.
It may take a long time for the pump and suction pipe to fill.
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Close the valve on the discharge side [2]. Open the valve on the suction side [1].
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Remove the filler screw [4].
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Partially open (7 – 8 mm) the priming/drainage screw [5].
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Fill the pump and the suction pipe with water.
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Ensure that there is no air trapped in the pump or suction pipe. Fill the system com-
pletely until all air is removed.
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Start the pump and verify that the direction of rotation complies with the specifica-
tion printed on the pump label.
CAUTION
Risk of damaging the pump
An incorrect direction of rotation will cause poor pump performance and may dam-
age the coupling.
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Slightly open the valve on the discharge side [2] and wait for the liquid to flow out of
the pump through the filler screw [4].
en
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