Shut-down/dismantling
en
Installation and operating instructions Wilo-Rexa CUT GI
19
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Min./max. temperature of the fluid tested?
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Max. immersion depth tested?
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Operating mode defined depending on the minimum water
level?
–
Maximum switching frequency adhered to?
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Check installation location/operating space:
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Pipe system on the pressure side free of deposits?
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Inlet or pump sump cleaned or free of deposits?
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All gate valves open?
–
Minimum water level defined and monitored?
The hydraulics housing must be filled completely with the
fluid and there must be no air cushions in the hydraulics.
NOTICE! Provide suitable venting devices if there is a risk
of air cushions being formed in the system!
7.5
Switching on and off
During the start process, the rated current is temporarily ex-
ceeded. During operation, the rated current may no longer be ex-
ceeded.
CAUTION! If the pump does not start, switch off the
pump immediately. Remove the fault before reactivating the
pump!
Place pumps which are installed as portable pumps on a firm sur-
face so they are level. If pumps have fallen over, place them up-
right again before activating them. Securely attach the pump with
screws in case of difficult surfaces.
Pumps with bare cable end
The pump must be switched on and off using a separate operating
point (on/off switch, switchgear) provided by the customer.
Pump with attached plug
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Single-phase current version: After inserting the plug in the
socket, the pump is switched on.
7.6
During operation
WARNING
Amputation of limbs due to rotating compon-
ents!
No persons must be present in the work area of the
pump! There is risk of (serious) injuries due to rotating
components! No persons must be present in the work
area of the pump during start-up or operation.
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 regula-
tions on the following topics:
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Work safety
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Accident prevention
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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 operating 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:
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Operating voltage (+/-10 % of the rated voltage)
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Frequency (+/-2 % of the rated frequency)
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Power consumption between individual phases (max. 5 %)
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Voltage difference between the individual phases (max. 1 %)
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Max. switching frequency
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Minimum water submersion depending on the operating mode
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Inlet: no air intake
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Level control device/dry-running protection: Switching points
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Quiet/low-vibration running
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All gate valves open
8
Shut-down/dismantling
8.1
Personnel qualifications
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Operation/control: Operating personnel must be instructed in
the functioning of the complete system.
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Electrical work: A qualified electrician must carry out the elec-
trical work.
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Installation/dismantling: The technician must be trained in the
use of the necessary tools and fixation materials for the relev-
ant construction site.
8.2
Operator responsibilities
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Locally applicable accident prevention and safety regulations
of trade associations.
