Wilo TOP-Z Instrucciones De Instalación Y Funcionamiento página 42

English
• 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 burn!
Depending on the pump or system operating conditions (fluid temperature),
the entire pump can get very hot. Touching the pump can cause burns.
Allow the system and pump to cool to room temperature.
9 Maintenance
Before carrying out maintenance / cleaning and repair work, read sections
"Dismantling/installation of the motor" and "Decommissioning". The safety
instructions in sections 2.6, 7 and 8 must be followed.
After maintenance and repair work, install and connect the pump as described
in the section "Installation and electrical connection". Switch on the machine as
described in the "Commissioning" section.
9.1 Dismantling/installation of the motor
WARNING! Risk of injury.
• Touching the pump can cause burns!
Depending on the pump or system operating conditions (fluid temperature),
the entire pump can get very hot.
• At high fluid temperatures and system pressures there is the risk of scalding
from escaping hot fluid.
Before dismantling the motor, close the existing shut-off devices on both
sides of the pump, allow the pump to cool to room temperature, and drain the
isolated branch of the system. If no shut-off devices are fitted, drain the sys-
tem.
• Risk of injury from the motor falling when the fastening screws have been
undone.
Comply with national regulations for accident prevention and also with the
operator's internal work, company and safety regulations. If necessary, wear
protective clothing and equipment!
• During installation/dismantling of the motor head, the rotor unit can fall out
and injure personnel. Do not hold the motor head with the impeller facing
downward.
The motor does not have to be completely removed from the pump housing if
only the terminal box is to be repositioned. The motor can be rotated to the
desired position whilst still attached to the pump housing (see Fig. 2 for the per-
mitted installation positions).
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WILO SE 11/2023