General Information; Handling; Installation; Fixing - Espa DELTA Manuel D'instructions

Contents
Safety precautions .................................................. 10
1. General information ........................................... 11
2. Handling ............................................................. 11
3. Installation ......................................................... 11
3.1. Fixing ........................................................ 11
3.2. Suction pipe assembly ............................. 11
3.3. Discharge pipe assembly ......................... 11
3.4. Electrical connection ................................ 11
3.5. Pre-start checks ....................................... 12
4. Starting .............................................................. 12
5. Maintenance ...................................................... 12
6. Disposing of the product .................................... 12
7. Nameplate ......................................................... 12
8. Possible faults, causes and solutions ................ 13
9. Technical data ................................................... 13
10. List of main components .................................... 42
11. Wiring diagrams ................................................. 43
12. Illustrations......................................................... 43
Safety precautions
This symbol
following words "Danger" or "Warning" indicates the
risk level deriving from failure to observe the
prescribed safety precautions:
DANGER Warns that failure to observe
the pre cautions involves a risk
risk of
of electric shock.
electric
shock
DANGER Warns that failure to observe
the pre cautions involves a risk
of damage to persons and/or
things.
WARNING Warns that failure to observe
the pre cautions involves the
risk of damaging the pump
and/or the facility

1. GENERAL INFORMATION

Please observe the following instructions to achieve
the best pump performance possible and a trouble
free installation.
Read these instructions before installing the
pump. Save them for future reference.
These are centrifugal horizontal electropumps, with
self-priming capacity and supplied with Ventury
system.
The DELTA 1755 models are multistage centrifugal
pumps having more than one impeller assembled
in-line. The same flow passes through each
impeller but the pressure increases each time, i.e.
more impellers, more pressure.
All models are manufactured
recirculation system with automatic valve achieving
suction lifts of up to nine meters. By using a foot
valve on the suction pipe the pump will rapidly self-
prime when operated.
These pumps are designed to operate with clean
water, free from particles in suspension and with a
maximum temperature of 40ºC.
together with one of the
to include
Correct pump operation is assured providing
the instructions on electrical connection,
installation and use are strictly adhered to.
Failure to adhere to the instructions can
result in premature failure of the pump and
voiding of the warranty.

2. HANDLING

The pumps are supplied suitably packaged to pre-
vent damage in transit. Before unpacking, check
that the packaging has not been damaged or de-
formed.
Lift and handle the product with care and with
the right tools.

3. INSTALLATION

These pumps are designed for both indoor and
outdoor use.
Make sure that pump is never submerged and that
it rests in a dry and well aired room.

3.1. Fixing

The pump should be installed on a solid, horizontal
base, secured by screws or bolts and using the
existing holes in the mount.
Ensure that the pump mount rests squarely on the
base before fixing.

3.2. Suction pipe assembly

The suction pipe, if longer than 7 meters, must be
of the same or greater diameter than the pump inlet
and installed in an upward inclination to prevent
trapped air pockets forming.
If the pump is required to perform a suction lift, to
avoid unnecessary losses of head on the discharge
side, the pump should be installed as close as pos-
sible to the water.
The end of the suction pipe must always remain at
least 30cm below the water level. (Fig.3)

3.3. Discharge pipe assembly

It is recommended to use pipes with a diameter equal
or greater than the pump outlet. This will re-duce loss
of head caused by friction in longer pipe runs.
Pipework must be supported and their weight must
not rest on the pump.
If a foot valve has not been installed it is recom-
mended to fit a check valve to prevent accidental
draining down of the system.

3.4. Electrical connection

The electrical installation must have a multi-
pole isolator with minimum 3mm contact
openings, The protection of the system will
a be based on a differential switch (Δfn = 30mA)
The power cable must correspond at least to the
type H05 RN-F (according to 60245 IEC 57) and
having terminals.
11
EN