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Motor-driven surface pumps
Serie 3D, 3M, 3LM
THE MANUFACTURER RESERVES THE RIGHT TO AMEND TECH-
NICAL DATA FOR THE PURPOSE OF PRODUCT IMPROVEMENTS
AND UPDATING.
5. PREPARING FOR USE
WARNING
T
O
I L
T F
O
R
M
A ROPE STRONG ENOUGH TO TAKE ITS WEIGHT,
TAKING CARE NOT TO TILT THE PUMP TOO MUCH
(MAX. 20°) (FIG. 1);
5.1. INSTALLATION
To install the pumps, proceed as directed in PART 1, chapter 7.2 and
in the following points:
–
u
e s
p
p i
s e
o
a f
s
t i u
b a
e l
d
meter (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-3DP
Units from series 3P - 3LP - 3DP 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 platform 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
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
u
e s
a
s
t i u
b a
e l
u s
p p
t r o
o f
compromise the motor-driven pump's alignment;
) c
s n i
a t
a l l
n
n o
e r
u t
n r
a v
e v l
in the following cases:
– when piping is long;
– when actual head is high;
O
V
E
T
H
E
M
O
T
O
R
D -
R
V I
E
N
P
U
a i
m
t e
, r e
e b
i r a
g n
n i
i m
d n
h t
t a
u s
t r
e h
u s
i t c
n o
a
d n
e d
v i l
r e
i l y
e n
o s
e b
w t
e e
t n
e h
u p
m
p
a
d n
d
l e
e v i
y r
EN
– 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
t .
e h
s
c u
o i t
to the pump to stop air pockets forming. Pipe couplings must be
fastened so that air is not sucked in;
M
P
U ,
S
E
2
t .
e h
s
c u
o i t
. 3
s n i
a t
t l l
e h
pockets forming.
5.3. FILLING MD AND 3D PUMPS
WARNING
O
TOR'S TERMINAL STRIP FULLY CLOSED.
i t c
n o
d
- a i
) a
n U
c s
e r
t w
e h
at the top;
) b
t i w
t h
e h
a
d i
) c
c s
e r
t w
e h
e h
getting in.
5.4. DISASSEMBLING MOTOR-DRIVEN PUMPS (FIG.3)
The support of the 3M-MD-3D-series pump is designed to allow mainte-
nance work when needed, so that the motor assembly can be removed
without disconnecting the casing from the pipes.
To remove the 3S - 3LS - 3DS motor-driven pump's motor, proceed
as follows:
–
t i w
t h
e h
a
d i
pressing towards the middle and pull them out of the slots in the
sleeve (3) (fi g. 3B);
–
o l
s o
n e
h t
t e
of the motor shaft – remove the screws (206) connecting 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, moving it axial-
ly. Parts are refi tted following the procedure in reverse order.
Apply threadlocker to grub screws (215) to prevent loosing during ope-
ration.
5.5. DISASSEMBLING MOTOR-DRIVEN PUMPS 3S-3LS-3DS (FIG. 4)
All inside parts can be disassembled and inspected without removing
the pump casing and pipes. Once you have isolated the motor-driven
pump from the system (close the gate valves, disconnect all connec-
tions, drain the pump casing), disassemble in the order given below:
s a
n
t o
o t
– coupling cover
– motor, and mount where applicable
a g
e t
a v
e v l
– mount support
– mounting unit complete with impeller and seal holder disc
parts are refi tted following the procedure in reverse order.
Operating and
maintenance manual
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