Commissioning; Maintenance - Wilo Star-Z 20/1 Instrucciones De Instalación Y Funcionamiento

6. Commissioning

6.1 System filling and venting
Ensure that the pipe system is
properly filled. The pump vents itself
automatically after a short operational
period. Short-term dry-running will not
harm the pump. If necessary, the
pump can be directly vented in ac-
cordance with the following procedure:
– Switch-off pump,
– close discharge isolating valve,
– Carefully slacken and remove the
central access plug using screw-
driver (Fig. 3).
– Depending on liquid tempe-
rature and system pressure,
hot liquid or vapour can be
releases when undoing the
central access plug.
Beware!
Danger of scalding!
– Protect electrical parts from leaking
water,
– switch-on pump again,
– after 15 ... 30 secs close access
plug again,
– open isolating valve again.
ATTENTION!
It is possible that the pump shaft jams
with the access plug open, depending
on system pressure.
– The pump can become
extremely hot, depending
on the operating state of
pump or pipe system (fluid
temperature).
Beware of scalding when
touching the pump!
6.2 Pre-Start Adjustments
– Direction of rotation check on
3-phase motors:
Remove central access plug at the
non-drive end of the motor. Briefly
switch on motor and check
whether sense of rotation corre-
sponds to the arrow on the name
plate; if necessary, change any two
phase wires.

7. Maintenance

Prior maintenance or repair
work switch off the pump and
secure against unauthorized
switching.
ENGLISH
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