Preparing For Use - EBARA 3 - MD Serie Manual De Instrucciones

THE MANUFACTURER RESERVES THE RIGHT TO AMEND TE-
CHNICAL DATA FOR THE PURPOSE OF PRODUCT IMPROVE-
MENTS AND UPDATING.

5. PREPARING FOR USE

WARNING
TO LIFT OR MOVE THE MOTOR-DRIVEN PUMP, USE A ROPE
STRONG ENOUGH TO TAKE ITS WEIGHT, TAKING CARE NOT
TO TILT THE PUMP TOO MUCH (MAX. 20°) (FIG. 1);
5.1. INSTALLATION SERIES 3, MD
To install the pumps, proceed as directed in PART 1, chapter 7.2
and in the following points:
– use pipes of a suitable diameter, bearing in mind that suc-
tion diameter (front side of pump) is different to delivery
diameter (top side of pump), (see chap. 4).
5.1.1. FOR MOTOR-DRIVEN PUMPS 3P-3LP-3BP
Units from series 3P - 3LP – 3BP are mounted on a base. Since
the units to be installed are not particularly heavy, and loads
through the pipes are not expected to be heavy, a base plate
is not essential. However, a raised base plate would make it
easier to insert a container underneath to catch liquid when the
pump casing needs draining, and would double as a safety pla-
tform when the fl oor is in danger of being fl ooded. When units
are placed directly on the fl oor, all you need to do is set just the
anchor bolts in the concrete.
Although the pump and motor have been aligned at the factory,
the base plate may be distorted when the locking screws are
fastened during installation. To assure correct alignment, use a
comparator or callipers to make sure the distance between the
two halves of the coupling is the same all the way round. Using
a rule or comparator, also check alignment (concentricity) of
the connector strip where the two halves of the coupling meet.
The coupling's cover must be removed for alignment. Make
sure you have refi tted it before starting the pump. Checks must
be made at four diametrically opposed points. Errors must be
corrected by loosening or removing the screws if necessary to
move the feet on the base and possibly add calibrated metal
strips (FIG. 4).
IF ALIGNMENT IS NOT ACCURATE, YOU MAY ENCOUNTER VI-
BRATIONS, DAMAGE TO BEARINGS AND COUPLINGS AND THE
END OF THE SHAFT MAY BREAK.
5.2. PIPEWORK SERIES 3, MD
To install pipes, proceed as directed in PART 1, chapter 7 and
in the following points:
a) do not fi t the pump on misaligned pipes;
b) use a suitable support for the suction and delivery line so
as not to compromise the motor-driven pump's alignment;
c) install a nonreturn valve between the pump and delivery
gate valve in the following cases:
– when piping is long;
– when actual head is high;
– when the pump is automatic;
– when water is pumped into the tank;
– when two or more pumps are working in parallel;
d) suction system:
1. the suction line should slope upwards (over 1/100) with
respect to the pump to stop air pockets forming. Pipe
couplings must be fastened so that air is not sucked in;
2. the suction line must be as short and straight as possi-
ble;
3. install the suction reducer as illustrated in FIG. 2 to stop
air pockets forming.
5.3. FILLING MD PUMPS
WARNING
OPERATION TO BE PERFORMED WITH THE MOTOR'S TER-
MINAL STRIP FULLY CLOSED.
a) Unscrew the hexagonal cap located on the front of the pump
casing at the top;
b) with the aid of a funnel, fi ll the pump with water to over-
fl owing;
c) screw the hexagonal cap back on until it is locked tight to
prevent air getting in.
5.4. DISASSEMBLING MOTOR-DRIVEN PUMPS (FIG.3)
The support of the 3M-MD-series pump is designed to allow
maintenance work when needed, so that the motor assembly
can be removed without disconnecting the casing from the pi-
pes.
To remove the 3S - 3LS – 3BS motor-driven pump's motor, pro-
ceed as follows:
– with the aid of a screwdriver, remove the two mesh guards
(44) by pressing towards the middle and pull them out of the
slots in the sleeve (3) (fi g. 3B);
– loosen the two screws (215) securing the coupling (6) on
the end of the motor shaft – remove the screws (206) con-
necting the motor fl ange to the sleeve fl ange. For pumps
coupled to motors according to construction method IM 335
(B3/B5 i.e. with fl ange and feet) (fi g. C and D), remove the
screws for fastening to the supports.
At this point, you can remove the motor from its housing, mo-
ving it axially. Parts are refi tted following the procedure in re-
verse order.
Apply threadlocker to grub screws (215) to prevent loosing du-
ring operation.
5.5. DISASSEMBLING MOTOR-DRIVEN PUMPS 3P-3LP 3BP (FIG. 4)
All inside parts can be disassembled and inspected without re-
moving the pump casing and pipes. Once you have isolated the
motor-driven pump from the system (close the gate valves, di-
sconnect all connections, drain the pump casing), disassemble
in the order given below:
– coupling cover
– motor, and mount where applicable
– mount support
– mounting unit complete with impeller and seal holder disc
– parts are refi tted following the procedure in reverse order.
GB
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