Xylem TVS - Manual (Page 39)

Installation, Operating and Maintenance Instruction
Model TVS
page 31
cable. Pressure line, support clamp and transverse
girders must be constructed so that they can bear the
whole weight of the unit (G), the cable (C) and the full
pipe (T) (also see Point 4.3 "Pipes"). During
installation each of the support clamps (M and B) will
be used alternatively to support and lower the pump
screwed to the pressure line
When assembling the pressure line comply with
Point 4.3 "Pipes".
Pay attention to cable "C" especially when counter-
boring. It must be continually observed and must be
carried loosely or tension free. Do not let it glide over
edges or under any circumstances subject the cable to
traction. Comply with the smallest permissible bending
radius according to Point 3.2.
When using pressure lines with flanged joints the
edges must be rounded carefully to prevent damage
to the cable. Use flange joints with cable recesses in
narrow bore holes.
When lowering, the cable must be attached loosely
and tension free to the pressure line at distances of 2-
3 m using cable clamps. Only use clamps made of
rust-free material to avoid corrosion in the damp
atmosphere of the well shaft.
Continually note the exact lengths of the
individual lengths of pipes. This will enable you
to lower the unit to the exact prescribed depth of
installation.
After completing installation mount the support clamp
which was attached last as holding clamp. Screws
should be secured against loosening and the support
clamp attached to their supports so that there is no
torsion.
4.10 Dismantling
All components must have cooled down to
ambient temperature.
The pump unit is dismantled using reverse
procedure for assembly; see point 4.9 "Lowering
the Unit".
Before starting to dismantle the pump unit make
sure that it cannot be switched on again.
Water in the discharge pipe - remember the
additional weight!
5. Electrical connection
Electrical connection work may only be carried
out by an authorised professional. The rules
and regulations valid for electrical technology,
especially those concerned with safety
measures, must be observed. The regulations
of the national power supply companies
operating in that area must also be observed.
The power supply cable must be connected to the
terminals according to the circuit diagram in the Motor
Operating Instructions.
5.1 Electrical Devices
The switching devices are directed by the kind of start
selected as well as by the control of the pump. Take
care that a reliable, rapid reaction motor protection
device is fitted which will definitely be able to protect
the motor from overloading. We recommend that you
install a volt meter and an ammeter to monitor start-up
and operations.
Mount switching and monitoring devices in a
dry, dust-free room.
5.2 Connecting the Cable
For optimal connection or the lowest possible contact
resistance the cable ends may not be solder coated.
Do not roll up excess cable lengths in reels as this can
lead to impermissible increases in temperature due to
induction.
Mount the unit's second rating plate which is
attached to the end of the cable in the control
cabinet. This will allow you to determine the type
designation and production number of the unit
at any time.
Due to the required coolness certain motor
actuation cables may only be installed flooded -
see Motor Operating Instructions.
6. Start-up, Operation, Shut down
The plant may only be taken into operation by
personnel who are familiar with local safety
regulations and these Operating Instructions
(especially with the safety regulations and safety
instructions contained in them.
Initial start-up
Check the setting of the excess current release for
three phase motors.
Measure the insulation values of the installed
machine to make sure that the cable(s) was/were
not damaged during installation.
Check flooding of the pump (minimum water level)
so that the pump will not run dry.
If pressure lines are empty only start with closed
valves so that the maximum permissible flow is
not exceeded.
Immediately after switching on or switching to
running position the current consumption must fall