21
ENGLISH
switches in accordance with the
latest edition of IEE wiring regula-
tions).
– In order to preserve protection
against moisture entry and to en-
sure a firm gland grip the mains
cable must have an sufficiently lar-
ge outside diameter.
– Heat-resisting cable must be used
if the pump is installed in systems
with water temperatures above
90 °C.
– Cable leads to be routed in such a
way to avoid any contact with
pipe work and/or pump or stator
housings.
– Check available power supply and
voltage.
– Observe pump name plate data
– Effect all power and control wiring
to SK 602/622 according to
Wiring Diagrams (Figs. 3a to 3e;
see also 1.2.2 and 4.1):
3a: 1~230/240 V, non-overloading
3b: 3~400/415 V, non-overloading
3c: 1~230/240 V with WSK
3d: 3~400/415 V with WSK
3e: when using C-SK plug-in trip
relay refer to diagram 3e in lieu
of 3d
– Observe earthing regulations.
– When using other starter/contac-
tor arrangements it is necessary
to connect terminals 15 and 10
(WSK) into the control circuit
(max. 250 V) in conjunction with a
restart locking devive. The pump
is then protected at all speed set-
tings.
When using external
thermal overload protection the
pump is protected ONLY AT ONE
of the four speed settings.
– Thermal overloads must be set to
suit FLC value of the selected
speed setting (note name plate
data).
– When used in conjunction with
automatic control gear pay atten-
tion to unit-respective operating
instructions.
6. Commissioning
6.1 System filling and venting
Ensure that the pipe system is pro-
perly filled. Venting of the pump is
automatic after a short operational
period. Short-term dry-running will
not harm the pump. If necessary,
the pump can be directly vented in
accordance with the following pro-
cedure (Fig. 4):
– Switch-off pump,
– Close discharge isolating valve,
– Remove central plastic cover plug
at end of motor housing,
– Carefully slacken and remove the
vent plug using a size 5 screw-
driver,
CAUTION !
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