Installation and electrical connection
en
Installation and operating instructions Wilo-Rexa CUT GI
13
WARNING
Hand and foot injuries due to lack of protect-
ive equipment!
Danger of (serious) injuries during work. Wear the fol-
lowing protective equipment:
• Safety gloves for protection against cuts
• Safety shoes
• Safety helmet must be worn if lifting equipment
are used!
NOTICE
Use only properly functioning lifting equip-
ment!
Use only properly functioning lifting equipment to lift
and lower the pump. Ensure that the pump does not
become jammed during lifting and lowering. Do
not
exceed the maximum bearing capacity of the lifting
equipment! Check that lifting equipment is function-
ing properly before use!
NOTICE
Emerging of the motor during operation
If the motor emerges during operation, observe the
instructions for “non-immersed operating mode”! To
ensure the necessary cooling of the motor for con-
tinuous duty, the motor must be completely im-
mersed before re-activation!
ƒ
Prepare operating space/installation location as follows:
–
Clean, free of coarse solids
–
Dry well
–
Frost-free
–
Decontaminated
ƒ
Take immediate countermeasures if there is a build-up of toxic
or suffocating gases!
ƒ
Use the handle for lifting, lowering and transporting the pump.
Never carry or drag the pump by the power supply cable!
ƒ
It must be possible to attach lifting equipment safely. The
storage place and the operating space/installation site must be
accessible with the lifting equipment. The set-down location
must have a solid bearing surface.
ƒ
Attach the lifting gear to the handle using a shackle. Only use
lifting gear which has been technically approved.
ƒ
The routed power supply cables must allow safe operation.
Check whether the cable cross-section and the cable length
are sufficient for the selected installation type.
ƒ
The corresponding IP class must be observed when using
switchgear. Install the switchgear overflow-proof and outside
potentially explosive areas!
ƒ
Avoid air intake into the fluid, use baffles or deflector plates for
the inlet. Air which has entered the system can collect in the
pipe system and lead to impermissible operating conditions. Air
pockets must be removed via ventilation systems!
ƒ
A dry run of the pump is prohibited! Avoid air pockets in the
hydraulics housing or in the pipe system. Ensure the water level
never falls below the minimum. The installation of a dry-run-
ning protection is recommended!
6.4.1
Indications for double pump operation
If several pumps are used in an operating space, minimum dis-
tances between the pumps and the wall must be complied with.
Here there is a difference in the distances depending on the type
of system: Alternating operation or parallel operation.
d
A
2
A
1
Fig. 3:
Minimum distances
d
Diameter hydraulics housing
A
1
Minimum distance from the wall:
- alternating operation: min. 0.3 × d
- parallel operation: min. 1 × d
A
2
Distance to pressure pipes
- alternating operation: min. 1.5 × d
- parallel operation: min. 2 × d
6.4.2
Maintenance tasks
After a storage period of more than 6 months, check the oil in the
sealing chamber prior to installation:
