RWCP, RWCN
9
5.4.2 Time relay adjustment
In the star-triangle start-up of three-phase motors, it is
necessary to ensure that the switching from star to triangle
takes place quickly. Prolonged switchover periods will cause
damage to the pump.
Timer relay adjustment in the star-triangle connection:
Motor power Time adjustment -Y
≤ 30 kW < 3 sec.
> 30 kW < 5 sec.
5.4.3 Rotation direction. Check
Check the motor rotation direction by starting
up and immediately stopping. The rotation
direction must correspond with that shown by the pump arrow
located on the pump casing or support. If the rotation direction
is not correct, any two phases L1, L2 or L3 of the power cable
must be inverted in the motor terminal box.
The incorrect rotation of the pump may lead to the incorrect
operation of the seal and the stopping of its faces. For this
reason, correct rotation direction must be ensured using the
arrow shown on the pump, with the pump completely filled
with liquid and properly vented.
6 Start up
It is necessary to prevent the formation of explosive
atmosphere within the well or tank where the pump is to be
installed.
Start-up shall be carried out when all the necessary
mechanical, hydraulic, electrical and pneumatic connections
are complete. The coupling guard must as well be in place
and firmly secured.
Motor checks.
When making the electrical connection, ensure the
type of current and nominal voltage shown on the
motor's data plate concur with the type of current and
the mains voltage in the place of installation.
Follow the instructions described in the motor manual.
6.1 First start-up
The pump cannot operate with a closed impulsion valve, as
this may lead to overheating of the pumped liquid. If it is
necessary to work with the discharge valve closed, a minimum
flow relief device is required at the output. This device does
not form part of the pump and will be separate from the
pump's discharge flange.
Other recommended devices include the constant output
orifice plates, constant bypass valves and automatic
recirculation valves. If you require further details, please check
with KSB ITUR.
The pump cannot work in closed suction valve conditions. If
this condition may come about, the plant operator must use a
device which detects this condition and forces the pump to
stop when it occurs.
6.1.1 Lubricant
BEARINGS:
Lubricated with grease. PUMP WITH GREASE NIPPLES
: The
pump leaves the factory with the bearings greased for
approximately 1000 hours of operation. See lubricant in
section 7.2.2.
FRICTION BEARINGS:
Lubricated with pumping fluid
: If the pumped fluid is clean
(without particles in suspension) and non-aggressive, the
friction bearings are lubricated with the pumped fluid.
Lubricant is not required.
Lubricated with external fluid PUMPS WITH
EXTERIOR AUXILIARY CONNECTION IN
THE BASE PLATE: If the pumped fluid is dirty, aggressive,
abrasive, etc, the PUMP HAS A CONNECTION for the
lubrication and cooling of the bearings through an exterior
means. Clean water or another fluid compatible with the
pumped fluid must be injected. See section 7.2.2..
Note
Note
Lubricated WITH AUTOMATIC
LUBRICATION PUMP IN THE BASE PLATE:
If the pumped fluid is dirty, aggressive, abrasive, etc, the
PUMP HAS AN AUTOMATIC LUBRICATION PUMP ON THE
BASE PLATE for the lubrication and cooling of the bearings.
The automatic pump container must be filled with grease
before starting up. See lubricant in section 7.2.2..
Note
The bearings must be lubricated with oil/grease in a good
state, to which end it is essential to follow the lubrication
instructions indicated in 7.2.2..
If the bearings support suffers impediments which prevent
correct air-cooling, the resulting excess temperature may be
excessive for the classification temperature class. For this
reason, the support must be kept free of obstacles, thus
facilitating natural air cooling.
6.1.2 Filling (priming) of the pump
- Check that the level of liquid in the well is sufficient.
- Turn the pump shaft by hand in order to break any
adherence.
Shaft sealing
Packing:
The gland nuts must be gently tightened (by hand).
The gland must form a right angle to the shaft.
6.1.3 Final control
Make the final check of the group alignment in accordance
with 5.2.1. The coupling/shaft must allow easy manual
rotation.
Check all the auxiliary connections are
correct and functioning.
Note
According to the rules on the prevention of
accidents at work, equipment cannot be started up
without protection for the coupling. If the buyer has
expressly requested that this protector be excluded from
supply, it must be provided by the user.
Before and during the operation of the pump, the coupling
guard must be in place and firmly secured. Regularly check
this state in order to prevent problems resulting from incorrect
positioning or deficient attachment. The coupling guard must
be free of any foreign elements.
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