Installation and operating instructions Wilo-TOP-S/-SD/-Z/-D/-RL/-I
47
English
8.3
Decommissioning
The pump must be decommissioned before performance of maintenance or
repair work or disassembly.
DANGER! Danger of death!
There is a mortal danger through shock when working on electrical equip-
ment.
• 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.
• Have work on the electrical part of the pump carried out only by a qualified
electrician as a basic principle.
WARNING! Risk of burns!
Depending on the operating status of the system, the entire pump can
become very hot. Touching the pump can cause burns.
Allow the unit and pump to cool to room temperature.
9 Maintenance
Before carrying out maintenance/cleaning work and repairs, refer to the
“Decommissioning” chapter. The safety instructions in the chapter 2.6 must be
complied with.
After maintenance and repair work, install and connect the pump as described
in the chapter “Installation and electrical connection”. Switch on the system as
described in the “Commissioning” chapter.
9.1
Deinstallation/installation of the motor
WARNING! Danger of personal injury!
• Touching the pump can cause burns!
Depending on the pump or system operating conditions (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 deinstallation of the motor, close the existing check valves on both
sides of the pump, allow the pump to cool to room temperature, and drain the
isolated branch of the system. If no check valves are fitted, drain the whole
system.
• Risk of injury due to the motor falling when the securing 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!
