Xylem Z8 ZR8 Z10 ZR10 Z12 ZR12 - Manual (Page 29)

Installation, Operating and Maintenance Instruction
page 29
Installation position
Vertical and horizontal installation is allowed. The
maximum operating flow must be kept. The pump
design is with or without integrated non-return valve
(at vertical or horizontal installation).
Protection against running dry
The pumps must not run dry under any circumstances
(not even for a short time for the purpose of checking
the direction of rotation), since overheating can
damage pump components. Therefore we
recommend monitoring the required minimum water
level in order to protect the pump.
Pump Backflow
It is not permissible to drain the pressure line after the
pump has been switched off as the backflow speed
can be many times the operating speed and would
destroy the unit. A backflow through the pump can be
prevented by suitable non-reflux fittings as close to the
pump as possible insofar as a non-return valve are not
installed in the pump.
2. Description
2.1 Models
Z8*/ZR8*
Z10*/ZR10*
Z12*/ZR12* Submersible pump for wells with 8"-
12” bore.
Please see the Appendices for the sectional drawings
and index of parts for each pump.
The detailed designation of the pump is shown on the
pump nameplate ort he order confirmation.
2.2 Pipe Connection
pipe connection internal thread
Z8*/ZR8* Rp5 ÖNORM EN 10226
Z10*/ZR10* Rp6 ÖNORM EN 10226
Z12*/ZR12* API 8" NPT
Other pipe connections are executed optionally on
customer request and are seen in the order
confirmation.
2.3 Bearings
The pump shaft is maintained multiple in
maintenance-free plain bearings.
2.4 Motor
The motor of your pump has its own Operating
Instructions. It is vital that you read and comply
with the instructions and safety instructions
contained in them.
3. Transport, Handling, Storage
3.1 Transport, Handling
 Check the pump/pump unit immediately upon
delivery/receipt of despatch for damage or missing
parts.
 The pump/pump unit must be transported carefully
and by competent personnel. Avoid serious
impacts.
 Keep the pump/pump unit in the same position in
which it was supplied from the factory. Take note
of the instructions on the packaging.
 The intake and discharge side of the pump must
be closed with plugs during transport and storage.
Dispose of all packing materials in accordance
with local regulations.
 Lifting aids (stacker, crane, crane mounting
device, lifting blocks, sling ropes, etc.) must have
the proper dimensions so that they can bear the
weight of the pump, motor and the pressure line
when it is full of water.
 The pump/pump unit may only be lifted by solid
points. The following illustration shows the correct
method of carrying by crane.
Under no circumstances may the unit be lifted
on to the motor cable. Do not damage the cable
during transport (do not squeeze, bend or drag).
The cable ends must be kept dry.
Do not stand underneath suspended loads; take
note of the general regulations on prevention of
accidents.