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WARNING! Risk of injury!
Depending on the temperature of the fluid and system pres-
sure, when the venting screw is opened, hot liquid or gaseous
fluid may escape or shoot out at high pressure.
Escaping fluid can cause scalding!
• Undo the venting screw carefully with a suitable screwdriver
and unscrew it completely (fig. 8).
• Carefully push back the pump shaft with a screwdriver several
times.
• Protect electrical parts from any escaping water.
• Switch on the pump.
Note. The pump may jam if the vent screw is undone, depend-
ing on the operating pressure level
• Screw the venting screw back in again after 15 to 30 seconds.
• Open the shut-off device again.
8.2
Adjusting
Speed
The speed is adjusted by means of the rotary knob on the
terminal box (fig. 7).
Note. If on a double pump both the individual pumps are in
operation at the same time, the selected speeds must be
identical for both pumps.
9 Maintenance
DANGER! Risk of fatal injury!
There is a risk of fatal injury from electric shock when work-
ing on electrical equipment.
• The pump should be electrically isolated and secured against
unauthorised switch-on for any maintenance or repair work.
• Any damage to the connection cable should only ever be
eradicated by a qualified electrician.
Installation and operating instructions Wilo-Star-Z/-ZD
English
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