Wilo Wilo-Rexa NORM, Installation And Operating Instructions Manual

Page: 19 / 32

Installation and operating instructions Wilo-Rexa NORM 19
INSTALLATION English
• Free access to the pump must be ensured for
maintenance work. For this purpose, a free space
of at least 60 cm (24 in) must be provided around
the pump.
• When working in enclosed spaces, a second
person must be present for safety reasons. Take
the necessary countermeasures if there is a risk of
toxic or suffocating gases collecting!
• Ensure that lifting equipment can be installed
without any trouble since this is required for
assembly/dismantling of the pump. The storage
location for the pump must be safely accessible
with the lifting equipment and must have a solid
base.
5.3.2. Foundation
• The structural components and foundations must
be of sufficient stability in order to allow the
product to be fixed securely and functionally.
• The operator or the supplier is responsible for
provision of the foundations and their suitability
in terms of dimensions, stability and strength!
5.3.3. Attachment points
For transportation, the lifting gear must be
attached to the specified attachment points. We
differentiate here between the unit and the “bare
shaft” version.
Fig. 3.: Attachment points
A Unit
B “Bare shaft” version
1 Transport shackle
Definition of symbols
Attach here!
Centre of gravity marker
Shackle must be used!
Lifting equipment: Chain permitted
Lifting equipment: Wire rope or nylon rope
permitted
Lifting equipment: Transport strap permitted
Use of a hook for attachment is prohibited!
Use of chains as lifting equipment prohibited
The following information must be observed
when attaching the lifting equipment:
• Unit: The lifting equipment must be attached to
the baseplate using shackles. Carrying straps, wire
ropes and plastic ropes or chains may be used as
lifting equipment.
• Bare shaft version:
- The lifting equipment must be attached using a
loop. Chains may not be used here!
- The transport shackle must be dismantled after
positioning is complete.
• The lifting gear used must be technically
approved.
• Note the centre of gravity marker on the base-
plate.
5.3.4. Maintenance work
After a storage period of more than 6 months, the
following maintenance work must be carried out
before installation:
• Rotate impeller
• Check oil in the sealing chamber
Rotate impeller
1. Place the pump horizontally on a solid surface.
Make sure that the pump cannot fall over
and/or slip!
2. Carefully and slowly reach into the hydraulics
housing through the suction port and rotate the
impeller.
WARNING! Sharp edges!
Sharp edges can form on the impeller and the
opening on the suction port. There is a risk of
injury! Wear protective gloves.
5.3.5. Check oil in the sealing chamber (Fig. 12)
The sealing chamber has a separate opening for
draining and filling the sealing chamber.
1. Place the pump horizontally on a solid surface.
Make sure that the hydraulics cannot fall over
and/or slip!
2. Unscrew screw plug (D+).
3. Place a suitable tank under the screw plug (D-) to
collect the operating fluid.
4. Unscrew screw plug (D-) and allow the opera-
ting fluid to drain out. If the oil is clear, does not
contain any water, and the quantity matches the
specification, it can be reused. If the oil is con -
taminated, it must be disposed of in accordance
with the requirements in the “Disposal” chapter.
5. Clean the screw plug (D-), renew the seal ring and
screw it back in.
6. Pour the operating fluid in through the opening
(D+).
See chapter “Operating Fluid” (8.1.1) and “Filling
quantities” (8.3.6)!
7. Clean the screw plug (D+), renew the seal ring and
screw it back in.