Wilo TOP-S Instrucciones De Instalación Y Funcionamiento página 45

9 Maintenance
Before carrying out maintenance, cleaning and repair work, read the chapters
"Dismantling/installation of the motor" and "Decommissioning". The safety
instructions in chapters 2.6, 7 and 8 must be complied with.
After successful maintenance and repair work, install and connect the pump
according to the "Installation and electrical connection" chapter. Switch on the
system as described in the "Commissioning" chapter.
9.1 Dismantling/installation of 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 isolated
branch of the system. If no check valves are fitted, drain the entire system.
• Observe the manufacturer's information and safety data sheets on possible
additives in the unit.
• 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 nec-
essary, 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-
missible installation positions).
CAUTION! Risk of damage to property!
If for maintenance or repair work the motor head is detached from the pump
housing, the O-ring located between the motor head and pump housing must
be replaced with a new one. When installing the motor head, check that the
O-ring is correctly seated.
• To release the motor, undo four socket-head screws.
CAUTION! Risk of damage to property!
Do not damage the O-ring located between the motor head and the pump
housing. The O-ring must lie in the angled end of he bearing plate that faces
the impeller, and must not be twisted.
• After the installation tighten the four socket-head screws again crosswise.
• For the commissioning of the pump, see chapter 8.
Installation and operating instructions Wilo-TOP-S/-SD/-RL/-I
English
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