10. Startup
10.1 Flushing the pipe system
Before starting up the pump for the first
time, clean the pipe system thoroughly by
flushing it and filling it with clean water.
Do not use the pump for flushing the pipe
system.
The warranty does not cover any damage
caused by flushing the pipe system by
means of the pump.
10.2 Priming the pump
Fill the pump with liquid and vent the pump
before starting the pump. To ensure
correct venting, the vent screw must point
upwards.
Closed systems or open systems where the liquid
level is above the pump inlet
1. Close the outlet isolating valve and loosen the
vent screw in the motor stool. See figure Position
of vent screw.
WARNING
Escaping hot or cold liquids
Death or serious personal injury
‐ Pay attention to the direction of the
vent hole, and make sure that the
escaping hot or cold liquid does not
cause injury to persons or damage
to the equipment.
‐ Wear personal protection
equipment.
2. Slowly open the isolating valve in the inlet pipe
until a steady stream of liquid runs out of the vent
hole.
3. Tighten the vent screw and completely open the
isolating valve(s).
Open systems where the liquid level is below the
pump inlet
Make sure that the inlet pipe and the pump is filled
with liquid and vented before you start the pump.
1. Close the outlet isolating valve and open the
isolating valve in the inlet pipe.
2. Loosen the vent screw. See figure Position of vent
screw.
3. Remove the plug from one of the pump flanges,
depending on the pump location.
4. Pour liquid through the priming port until the inlet
pipe and the pump are filled with liquid.
5. Replace the plug and tighten securely.
6. Tighten the vent screw.
You can fill the inlet pipe with liquid and vent it before
you connect it to the pump. You can also install a
priming device before the pump.
TM057922
Position of vent screw
10.3 Starting the pump
1. Before starting the pump, completely open the
isolating valve on the inlet side of the pump and
leave the outlet isolating valve almost closed.
2. Start the pump. See section User interfaces.
3. Vent the pump by loosening the vent screw in the
motor stool until a steady stream of liquid runs out
of the vent hole. See figure Position of vent screw.
WARNING
Escaping hot or cold liquids
Death or serious personal injury
‐ Pay attention to the direction of the
vent hole, and make sure that the
escaping hot or cold liquid does not
cause injury to persons or damage
to the equipment.
‐ Wear personal protection
equipment.
4. When the pipe system has been filled with liquid,
slowly open the outlet isolating valve until it is
completely open.
Related information
10.2 Priming the pump
12. User interfaces
10.4
Shaft seal run-in
The seal faces are lubricated by the pumped liquid,
meaning that there may be a certain amount of
leakage from the shaft seal.
When the pump is started up for the first time, or
when a new shaft seal is installed, a certain run-in
period is required before the leakage is reduced to an
25
English (GB)
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