5. Starting up the product
5.1 Flushing the pipe system
CAUTION
Biological hazard
Minor or moderate personal injury
‐ When pumping drinking water, the
pump must be flushed thoroughly with
clean water before startup in order to
remove any foreign matters, such as
preservatives, test liquid, or grease.
• Before starting up the pump, thoroughly clean,
flush and fill the pipe system with clean water.
The warranty does not cover any
damage caused by flushing the pipe
system by means of the pump.
The pump is not designed to pump
liquids containing solid particles such
as pipe debris and welding slag.
5.2 Priming
Always fill and vent the pump before
starting the pump. To ensure correct
venting, the vent screw must point
upwards.
5.2.1 Priming the product in closed systems or
open systems where the liquid level is above
the pump inlet
WARNING
Escaping liquid
Death or serious personal injury
‐ Pay attention to the orientation of the
vent hole to ensure that the escaping
liquid does not cause personal injury or
damage to the motor or other
components.
‐ In hot-liquid installations, pay special
attention to the risk of personal injury
caused by scalding hot liquid.
‐ In cold-liquid installations, pay special
attention to the risk of personal injury
caused by cold liquid.
1. Close the isolating valve on the outlet side and
loosen the vent screw in the motor stool.
TM038126
Position of vent screw
2. Slowly open the isolating valve on the inlet side
until a steady stream of liquid runs out of the vent
hole.
3. Tighten the vent screw and completely open the
isolating valve(s).
5.2.2 Priming the product in open systems where
the liquid level is below the pump inlet
The inlet pipe and the pump must be filled with liquid
and vented before the pump is started.
1. Close the isolating valve on the outlet side and
open the isolating valve on the inlet side.
2. Loosen the vent screw.
3. Remove the plug from one of the pump flanges,
depending on the pump location.
4. Pour liquid through the priming hole until the inlet
pipe and the pump are filled with liquid.
5. Replace the plug and tighten securely.
6. Tighten the vent screw.
The inlet pipe can to some extent be filled with liquid
and vented before it is connected to the pump. A
priming device can also be installed before the pump.
TM038126
Position of vent screw
18
English (GB)
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