12
5.3 Commissioning
WARNING
The pump must not be switched on
when it does not contain any liquid.
The direction of rotation of the pump is clockwise
seen from the top of the pump (A). The reactive force
will cause a shock movement in the opposite direction
(B) when started up.
ATTENTION
In case of a 3-phase motor the rotating
direction can be changed by
exchanging two of the three phase
wires.
ATTENTION
You are allowed to reduce the
submersible level up to the set point
specified in 9.1 Technical specifications
when operation is intermittent.
ATTENTION
The pump must be completely
submersed when operation is
continuous.
Check whether the submersible sewage pump
switches on and off at the correct liquid levels when
commissioning. Fill the drain up to the on switching
level of the pump. Use the liquid to be pumped or
clean water.
1 Check whether the pump switches on
automatically.
2 Check whether the pump switches off
automatically when reaching the off switching
level.
3 Check whether liquid is not returned from the
delivery pipe in the drain.
ATTENTION
Drill a small hole for venting at the
highest point of the pipe system (just
before the swing check valve) should
air remain enclosed in the pump
housing. Provide the hole with a
stainless steel nipple to ensure it
cannot become rusted up. Remember
that liquid can squirt from the drilled
hole.
ATTENTION
The DRV6/8 and DRS3 have been fitted
with a special bolt that can be removed
when there are problems with air
staying in the pump housing. The bolt
can be found on the other side of the
delivery connection under the motor
cable inlet.
A
B
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