7
• The pump requires no external motor protec-
tion.
• The operating voltage and frequency are
marked on the pump nameplate. Make sure
that the motor is suitable for the electricity
supply on which it will be used.
• Mains connection is to be carried out as
shown in
t
.
• The green indicator light on the pump termi-
nal box indicates that the electricity supply
has been switched on.
5. Start-up
Do not start the pump until the system has
been filled with liquid and vented. Furthermore,
the required minimum inlet pressure must be
available at the pump inlet, see section
. The system cannot be
vented through the pump.
As the pump is self-venting, it need not be
vented before start-up.
The pump may be noisy, when first switched
on, due to air remaining in the chamber. This
noise should cease after a few minutes run-
ning.
The earth terminal of the pump must
be connected to earth.
The pump must be connected to an
external mains switch with a minimum
contact gap of 3 mm in all poles.
When the inspection screw is slack-
ened (see
r
), scalding hot liquid un-
der high pressure may escape. Care
should be taken to ensure that the es-
caping liquid does not cause personal
injury or damage to other compo-
nents.
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