EBARA EVMSN Serie Instrucciones Originales página 14

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 coupling
guards and the locking insert.
3. Remove the no.4 fixing screws of the half coupling and the half coupling.
4. Evenly loosen the three set screws in the seal holder.
5. Remove the motor key from the motor.
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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.
[A-5]
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 coupling
halves is even. If not, repeat from step 9.
12. Evenly tighten the three set screws on the seal holder to the specified
torque.
[A-9]
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.
23. Assemble the two coupling guards (4 screws).
24. Permanently connect the delivery and the suction lines.
25. The pump is now installed.
Procedure for models without bearing: follow steps 1-25
Procedure for models with bearing: skip steps 2-6, 9-12, 15 and 20-23
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 negatively
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 supported 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 diameter of the pipe;
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its distance from the bottom of the reservoir should also be one and a half
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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
[A-2]
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
Fasten the electric pump with bolts to a suitably rigid base fit to support the weight
of the pump or to an appropriate 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 EVMSN 3, 5 and 10). Move the pump back
into position, line it up with the pipes and tighten the screws all the way. The posi-
tion 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 maximum
working pressure.
On the delivery line, before the nonreturn valve and isolating valve, we recommend
you also install a pressure gauge.
Use suitable supports for the suction and delivery lines so that they do not subject
the pump's flange to too much stress.
If the pump is installed with a suction lift arrangement (level of liquid lower than the
pump) and it feeds an open circuit, you will need to install a foot valve at the end
of the suction line. In this case it is advisable to use a hose connected to the pump.
WARNING!
Make sure that the sum of the difference in height between
the water and suction port and pressure losses along the
suction line is lower than the pump's theoretical suction lift.
Water temperature and altitude also have a negative effect on
the pump's theoretical suction lift. If the sum of the various
factors affecting suction lift exceeds the actual pump's
theoretical suction lift, we are faced with the cavitation
problem, which compromises hydraulic performance and
results in damage to some of the pump's vital parts. Chap.
15.4 Gives specific information on how to check that the
pump's operation is not being affected by cavitation.