Shut-Down/Dismantling; Personnel Qualifications; Operator Responsibilities; Shut-Down - Wilo Rexa CUT GI Instrucciones De Instalación Y Funcionamiento

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WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It
may cause burns. Allow the pump to cool down at
ambient temperature after switching it off!
NOTICE
Pumping problems due to water level being
too low
If the fluid is lowered too much, separation of the
volume flow may occur. Furthermore, air cushions
may form in the hydraulic system, resulting in un-
desirable behaviour during operation. The minimum
permissible water level must reach the upper edge of
the hydraulics housing!
When operating the pump, observe the locally applicable
regulations on the following topics:
▪ Work safety
▪ Accident prevention
▪ Handling electrical machines
Strictly adhere to the responsibilities of the personnel
specified by the operator. All personnel are responsible
for ensuring that the responsibilities of the personnel
and the regulations are observed!
Due to their design, centrifugal pumps have rotating
parts that are easily accessible. Depending on the oper-
ating condition, sharp edges can develop on these parts.
WARNING! This can lead to cuts and limbs may be
severed! Check the following at regular intervals:
▪ Operating voltage (+/-10 % of the rated voltage)
▪ Frequency (+/-2 % of the rated frequency)
▪ Power consumption between individual phases
(max. 5 %)
▪ Voltage difference between the individual phases
(max. 1 %)
▪ Max. switching frequency
▪ Minimum water submersion depending on the operating
mode
▪ Inlet: no air intake
▪ Level control device/dry-running protection: Switching
points
▪ Quiet/low-vibration running
▪ All gate valves open
106

Shut-down/dismantling

8 Shut-down/dismantling
8.1

Personnel qualifications

▪ Operation/control: Operating personnel must be instruc-
ted in the functioning of the complete system.
▪ Electrical work: A qualified electrician must carry out the
electrical work.
▪ Installation/dismantling: The technician must be trained
in the use of the necessary tools and fixation materials
for the relevant construction site.
8.2

Operator responsibilities

▪ Locally applicable accident prevention and safety regula-
tions of trade associations.
▪ Observe regulations for working with heavy loads and
under suspended loads.
▪ Provide the necessary protective equipment and make
sure that the personnel wears it.
▪ Provide adequate aeration in closed rooms.
▪ Take immediate countermeasures if there is a build-up
of toxic or suffocating gases!
8.3

Shut-down

The pump is deactivated during decommissioning, but
remains installed. This ensures that the pump is always
ready for operation.
‡
To protect the pump from frost and ice, always immerse
the pump completely in the fluid.
‡
The temperature of the fluid must always be above +3 °C
(+37 °F).
1. Switch off the pump at the operating point.
2. Secure the operating point against being switched on
again by unauthorised persons (e.g. lock main switch).
▶ The pump is out of operation and can now be dis-
mantled.
If the pump remains installed after decommissioning,
observe the following:
▪ Ensure that the prerequisites for decommissioning are
maintained for the complete period of decommissioning.
If these prerequisites cannot be guaranteed, dismantle
the pump after decommissioning!
▪ For an extended period of decommissioning, carry out a
5-minute function test at regular intervals (monthly to
quarterly). CAUTION! A function test may only be car-
ried out under the applicable operating conditions. A
dry run is not permitted! Non-compliance can result in
irreparable damage!
WILO SE 2019-02