Decommissioning/Removal; Personnel Qualifications; Operator's Obligations - Wilo HC 20.1+EMU FA Instrucciones De Instalación Y Funcionamiento

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8

Decommissioning/removal

8.1

Personnel qualifications

8.2

Operator's obligations

32
Decommissioning/removal
WARNING
Danger of burning due to hot surfaces!
The motor housing can get hot during operation. It can lead to burns. Allow the pump to
cool down to ambient temperature after switching 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 undesirable behavior during
operation. The minimum permissible water level must reach up to the upper edge of the
hydraulics housing!
During pump operation observe the local regulations on the following subjects:
▪ Workplace safety
▪ Accident prevention
▪ Handling electrical machines
Strictly adhere to the personnel's work plan determined by the operator. All personnel are
responsible for adhering to the work plan and regulations!
Due to their design, centrifugal pumps have rotating parts that are easily accessible. De-
pending on the operating conditions, sharp edges can develop on these parts. WARN-
ING! This can lead to cuts and limbs may be amputated and severed! The following points
must be checked at regular intervals:
▪ Operating voltage (+/-10 % of the rated voltage)
▪ Frequency (+/- 2% of the rated frequency)
▪ Current consumption between the individual phases (max. 5 %)
▪ Voltage difference between the individual phases (max. 1 %)
▪ Maximum switching frequency
▪ Minimum water submersion depending on the operating mode
▪ Inlet: no air intake
▪ Level control device/dry-running protection: Switching point
▪ Smooth/low-vibration running
▪ All gate valves opened
Operation in the limit range
The pump can briefly be operated in the limit range (max. 15 min/day). During operation in
the limit range, expect relatively large deviations from the operating data. NOTICE! Contin-
uous duty in the limit range is prohibited! The pump is exposed to high wear and there is
a greater risk of failure!
The following parameters apply during operation in the limit range:
▪ Operating voltage (+/-10 % of the rated voltage)
▪ Frequency (+3/- 5 % of the rated frequency)
▪ Current consumption between the individual phases (max. 6 %)
▪ Voltage difference between the individual phases (max. 2 %)
▪ Operation/control: Operating personnel must be trained in the operating principle of the
complete system.
▪ Electrical work: A qualified electrician must carry out the electrical work.
▪ Installation-/dismantling work: The technician must be trained to handle the necessary tools
and required fastening materials for the present building site.
▪ Locally applicable accident prevention and trade association safety provisions.
▪ Observe all regulations for working with and underneath heavy suspended loads.
WILO SE 2019-01