Wilo TOP-Z Serie Instrucciones De Instalación Y Funcionamiento página 45

8.3 Decommissioning
The pump must be decommissioned before conducting maintenance, repair or
dismantling work.
DANGER! Risk of fatal injury!
Deadly electric shock may occur when working on electrical equipment.
• Have work on the electrical part of the pump carried out only by a qualified
electrician as a basic principle.
• Before starting any maintenance and repair work, disconnect the pump from
the power supply, and make sure it cannot be switched back on by unauthor-
ised persons.
WARNING! Risk of burns!
Depending on the operating status of the pump or unit (fluid temperature),
the entire pump can become very hot. Touching the pump can cause burns.
Allow the system and pump to cool down to room temperature.
9 Maintenance
Before carrying out any maintenance/cleaning and repair work, observe the
chapters "Decommissioning" and "Dismantling/installing the motor". The
safety instructions in chapter 2.6, 7 and 8 must be complied with.
After successful maintenance and repair work, install and connect the pump
according to the chapter "Installation and electrical connection". Switch on the
system as described in the chapter "Commissioning".
9.1 Dismantling/installing the motor
WARNING! Danger of bodily injury!
• Touching the pump can cause burns!
Depending on the operating status of the pump or unit (fluid temperature),
the entire pump can become very hot.
• At high fluid temperatures and system pressures there is risk of scalding due
to escaping hot fluid.
Before dismantling the motor, close the existing check valves on both sides
of the pump, allow the pump to cool to room temperature, and drain the iso-
lated branch of the system. If no check valves are fitted, drain the entire sys-
tem.
• Risk of injury due to the motor falling when the fastening screws have been
undone.
Comply with national regulations for accident prevention and also with the
operator's internal works, company and safety regulations. If necessary,
wear protective clothing and equipment!
Installation and operating instructions Wilo-TOP-Z
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