7
Safety measures
In order to reduce the risk of accidents during service and installation work,
take extreme care and bear in mind the risk of electrical accidents.
Before starting check bolts to the handle and nuts between motorhousing
and volute.
Note! Dry and wet installed pumps have different seal units.
Installation
Installation of pump with discharge
bracket - F
Arrange the cable run to the pump sump. Make sure
that the cables are not kinked or nipped.
Install the discharge bracket at the bottom of the
pump sump.
When fitting the upper guide bracket, make certain
that the guide tubes are vertical and parallel with
one another. Connect the delivery pipe to the
discharge bracket.
The lifting tackle must be installed at a point which is
directly above the centre of gravity of the pump.
As the pump is lowered, it will connect automatically to the discharge bracket
as it reaches the bottom of its travel.
Connect the cables to the starter equipment.
The pipes and valves must be sized to suit the performance of the pump.
See the product sheet for the pump.
Installation of pump for dry installation - T
Arrange the cable run so that the cables will not be kinked or nipped.
Pump units designed for dry installation are equipped with adjustable support
legs. The support consists of three legs of telescopic type. The suction pipe
can be connected in either direction by changing over the locations of the
legs.
Bolt the legs to the foundations.
CAUTION!
The lifting tackle must always be designed to suit the
pump weight, see page 18. Never walk under a suspended
load.
Adjust the vertical position of the volute and use the
set screws to lock the telescopic legs. Connect the
suction and delivery pipes and tighten them securely.
The drive unit will be easier to fit to the volute and
remove from it if the suction side is provided with a
drain valve which can be opened when the drive unit is
fitted or removed.
The delivery side should also be equipped with a drain
valve to enable the air contained in the system to be
purged. This connection can also be used for
connecting a pressure gauge.
The pipes and valves must be sized to suit the performance of the pump.
See the product sheet for the pump.
Installation of transportable pump
version - P
Arrange the cable run so that the cables will not be
kinked or nipped.
Connect the delivery pipe and cable. For further
particulars, see under the heading ”Electrical
connections”.
Place the pump on a firm surface which will
prevent it from overturning or burrowing down. The
pump can also be bolted down to the base or
suspended by the lifting handle slightly above the
bottom.
Hoses, pipes and valves must be sized to suit the pump performance. See
the product sheet for the pump.
The pump must be connected to terminals or starting equipment installed at
a level at which it cannot be flooded.
The electrical installation shall be inspected by an autorized electrician.
Electrical connections
The power supply should be fused with slow-blow fuses.
NOTE!
For safety reasons, the earth conductor in the pump should be
longer than the phase conductors.
If the motor cable is accidentally wrenched off, the earth conductor
should be the last to break away from its terminal. This applies to
both ends of the cable.
–
that the cable sheath is not damaged. When fitting a cable which has
earlier been used in the pump, always fit a new rubber bush and cut
away a piece of the cable so that the rubber bush will end up in a new
place on the cable.
When changing the cable, check the following to avoid leakage:
–
that the rubber bush and washers in the cable entry are suitable for the
cable. See the list of spare parts.
CAUTION!
If a cable is damaged, it must always be replaced.
The pumps are supplied for direct on-line starting or star-delta starting. See
the rating plate.
The starting equipment must be provided with overcurrent protection which
should be adjusted as follows:
1.
Direct on-line starting
Set the overcurrent relay to 10 percent over the current specified on the
rating plate.
2.
Star-delta starting
Set the overcurrent relay to the current specified on the rating plate
divided by 1.57 (or the specified rated current multiplied by 0.64). The
power supply should be fused with slow-blow fuses.
Changing the cable.
7-core cable
1 = star connection
2 = delta connection
10-core cable
3 = star, delta or star-delta connection
Check that the mains voltage, frequency, starting equipment and method of
starting agree with the particulars stamped on the motor rating plate.
N.B. A pump designed for 400 volt can be used in the 380-415 volt range.
A pump designed for 230 volt can be used in the 220-245 volt range.
Connection of stator and motor conductors.
Connect the stator and motor conductors as shown in the diagrams on page
20.
To enable the correct connections to be made, the number of conductors,
any monitoring equipment and the method of starting (see rating plate) must
be known.
The following wiring diagrams apply:
CAUTION!
The electrical installation must conform to national and
local regulations.
CAUTION!
All electrical equipment must always be earthed
(grounded). This applies both to the pump and to any
monitoring equipment.
CAUTION!
The pump is provided with control conductors, these are
marked F0, F1 and Di. F0 and F1 are connected to tempera-
ture sensors incorporated in the motor. Di is connected to a
moisture sensor which is situated in the lower part of the motor
compartment, and must be connected to a cut out relay. These must
be connected in series with the overcurrent relay in the starting
equipment, to ensure disconnection of motor if moisture or thermal
switches operates.
CAUTION!
Dismantling and repair of explosion proof motors may only
be carried out by approved personnel in specially approved
work shops.
Pumps for dry installation with cooling system, cooling liquid must
be filled before starting. Cooling liquid is water. If there is a risk of
freezing, add anti-freeze. The amount of cooling liquid can be seen
on page 18.