Starting - Wilo Medana CH1-L Einbau- Und Betriebsanleitung

en
8.2

Starting

26
Commissioning
Close the filler screw again once the water has exited via the screw port (air removed)
(pos. 4).
Open the valve on the suction side completely (pos. 1).
Open the valve on the end pressure side (pos. 2).
Pump in horizontal position in suction mode (Fig. 3b)
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.
Close the gate valve (pos. 2).
Open the gate valve (pos. 1).
Unscrew the filler screw (pos. 4).
Using a funnel inserted into the filling port, slowly and completely fill the pump and the
suction pipe. Close the filler screw once the air has escaped and the liquid is flowing in
the pump (pos. 4).
After checking the deblocking function and the direction of rotation of the motor:
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Briefly start the motor with an impulse then wait for a few seconds to allow the air to
settle.
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Slightly unscrew the filler screw (pos. 4) to remove the air. If a trickle of water does
not appear, remove this screw to fill the right water level in the pump. Put this screw
back in place before restarting.
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If necessary, repeat this operation.
Pump in vertical position in inlet mode (Fig. 3c)
Close the gate valves (pos. 1+2).
Unscrew the filler screw (pos. 4).
Slowly open the valve on the suction side (pos. 1).
Close the filler screw again once the water has exited via the screw port (air removed)
(pos. 4).
Open the valve on the suction side completely (pos. 1).
Open the valve on the end pressure side (pos. 2).
CAUTION
Risk of damaging the pump
The pump must not be operated at a zero flow rate flow (valve on the end pressure
side closed) for more than 10 minutes.
We recommend maintaining a minimum discharge of 10 % of rated discharge.
WARNING
Risk of injury
Depending on the operating conditions of the pump or the installation (the temper-
ature of the discharged liquid and the volume flow), the pump assembly including
the motor may become extremely hot. There is a real risk of burns when coming into
contact with the pump.
WILO SE 02/2020