Wilo Rexa UNI Series, Installation And Operating Instructions Manual

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en Installation and electrical connection
42 WILO SE 2019-02
▪ 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.
▪ Attach the lifting gear to the handle using a shackle. Only
use lifting gear which has been technically approved.
▪ The routed power supply cables must allow safe opera-
tion. Check whether the cable cross-section and the
cable length are sufficient for the selected installation
type.
▪ The corresponding IP class must be observed when using
switchgear. Install the switchgear overflow-proof and
outside potentially explosive areas!
▪ 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 op-
erating conditions. Air pockets must be removed via
ventilation systems!
▪ 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 installa-
tion of a dry-running protection is recommended!
6.4.1 Indications for double pump operation
If several pumps are used in an operating space, min-
imum distances between the pumps and the wall must
be complied with. Here there is a difference in the dis-
tances depending on the type of system: Alternating op-
eration 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 Note on DN 50/65 combination flange
The Rexa UNI V06... is equipped with a DN 50/65 com-
bination flange. The nuts on the combination flange are
factory-set to the DN 65 flange. For use with a DN 50
flange, adjust the nuts at the flange. The flange can be
reset to DN 65 at any time!
Fig. 4: Adjust combination flange
‡
No accessories mounted on flange.
‡
Nut is freely accessible.
1. Push the nut inwards onto the small hole circle using a
screwdriver.
▶ The flange connection is reset to DN 50.
6.4.3 Maintenance tasks
After a storage period of more than 6 months, check the
oil in the sealing chamber prior to installation:
1
Fig. 5: Check the oil
1 Screw plug sealing chamber
‡
Pump is not installed.
‡
Pump is not connected to the mains.
‡
Protective equipment has been put on!