EBARA EVM serie Manual De Instrucciones página 15

8.1 COUPLING TO THE MOTOR
The motors to be coupled to the EVM pumps must meet IEC standards and
must have the preload spring positioned as illustrated:
Motor/pump coupling operations must be carried out with the motor dis-
connected from the power supply.
Since it is best to perform a trial run following coupling to check operation,
if there is enough room, we suggest you perform coupling once the pump
has been fastened down in its working position and connected to the suc-
tion and delivery lines. Otherwise the trial run can be performed with fluid
piping connected in a makeshift manner.
8.1.1 ASSEMBLING THE MOTOR TO THE PUMP
WARNING!
The following procedure must be done with the unit
disconnected from its electrical power supply.
1. Position and secure the pump vertically on a flat, rigid surface.
2. Unscrew the four coupling guard screws, then remove the two cou-
pling guards and the locking insert.
3. Loosen the four coupling screws.
4. Evenly loosen the three set screws in the seal holder.
5. Remove the motor key from the motor.
6. Insert the half-key into the slot in the motor shaft.
WARNING!
The half-key should not protrude from the slot in the motor
shaft.
7. Set the motor vertically with its shaft downwards and place it over the
pump. The half-key must be positioned away from the gap between
the coupling halves.
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8. Insert and evenly tighten down the four motor bolts.
9. Use a suitable lever to pry the coupling connected with the pump
shaft upward to the correct position as follows:
- for 4.0 kW motor and below, lift up the coupling until the end of the
pump shaft touches the end of the motor shaft;
- for 5.5 kW motor and above, lift up the coupling until it is snug
against the end of the motor shaft.
10. Tighten the four coupling bolts evenly to the specified torque.
11. Rotate the coupling by hand to check that the gap between the cou-
pling halves is even. If not, repeat from step 9.
12. Evenly tighten the three set screws on the seal holder to the specified
torque.
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13. Temporarily connect the suction and delivery lines; then open the
delivery valve.
14. Fill the pump with water as described in Chapter 10.
15. Assemble the two coupling guards (4 screws).
16. Connect the motor to its power supply as described in Chapter 9.
17. Run the pump for a few minutes.
18. Check that the running noise and vibration are not excessive.
19. Shut off power to the motor and wait for the coupling to come to a
standstill.
20. Unscrew the four screws and remove the two coupling guards.
21. Inspect the interior of the mount for water.
22. If you find any water, drain the pump and reposition the coupling.
Repeat the process from step 4 to step 20.
1. Load direction
2. Thrust bearing
3. Preload spring
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23. Assemble the two coupling guards (4 screws).
24. Permanently connect the delivery and the suction lines.
25. The pump is now installed.
8.2 GENERAL INSTALLATION PRECAUTIONS
WARNING!
Remove the delivery and suction caps before hooking
the product up to the lines
a) Use metal or rigid plastic pipes in order to avoid their yielding because
of the depression created at suction;
b) support and align pipes so that they do not put any stress on the pump;
c) avoid throttlings caused by bending suction and delivery hoses;
d) seal any piping connections: air infiltration in the suction pipe nega-
tively affects pump operation;
e) we recommend that a non-return valve and a gate are installed on the
delivery pipe at the motor-driven pump outlet;
f) fix the piping to the reservoir or to any fixed parts so that it is not sup-
ported by the pump;
g) do not use a lot of bends (goosenecks) and valves;
h) on PUMPS installed above head, the suction pipe should be fitted with
a foot valve and filter in order to prevent foreign matter from entering
and its end should be immersed at a depth that is at least twice the di-
ameter of the pipe; its distance from the bottom of the reservoir should
also be one and a half times its diameter.
For suctions longer than 4 metres use an oversized pipe (1/4" wider at
suction for improved efficiency).
8.2.1 INSTALLATION
a) Position the pump on a flat surface that is as close as possible to the
water source. Leave enough space around the pump to allow safe use
and maintenance. A free space of at least 100 mm must be kept in front
of the cooling fan of surface pumps in all cases;
b) use pipes of suitable diameters fitted with threaded sleeves that must
be screwed onto the pump suction and delivery unions or its threaded
counterflanges;
8.2.2 POSITIONING THE PRODUCT
WARNING!
Install the pump in a ventilated area protected from
the elements (rain, frost.....).
Bear in mind the ambient temperature and altitude ranges given in chap.
15.2.
Place the pump away from walls, the ceiling or other obstacles so that the
pump can be fastened, operated and serviced safely.
The pump must be installed upright only.
8.2.3 FASTENING DOWN
Bolt the pump to a suitably rigid base for supporting the weight of the pump
or suitable metal structure. If the concrete base is an integral part of the
reinforced concrete structure of buildings with occupants, we recommend
using anti-vibration supports so as not to disturb anybody. When fastening,
use a drill bit to mark the centres of the 4 holes in the base of the pump on
the surface it is due to be installed on. Move the electric pump temporarily
and use a drill to make 4 holes (dia. 12 for EVMS 1, 3, 5, 10, 15, 20 pumps
and dia. 14 for EVM 32,45, 64 pumps). Move the pump back into position,
line it up with the pipes and tighten the screws all the way.
The position of the fastening holes is also illustrated in chap. 15.5.
8.2.4 PIPEWORK
In addition to the instructions given below, also comply with the general
instructions found in sect. 15.6 of the manual and with the directions in the
fig. 1.
Pipework must be sized to withstand the pump's ma-
ximum working pressure.
On the delivery line, before the nonreturn valve and isolating valve, we
recommend you also install a pressure gauge.
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EN
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