Xylem Lowara Scuba Manual

Additional Installation,
Operation and Maintenance Instructions
SCUBA
Close
-coupled submersible pump unit

en – Original instructions
2 SCUBA – Additional Installation, Operation and Maintenance Instructions
Table of Contents
1Introduction and Safety ............................................................................................................................................ 4
1.1 Introduction ...................................................................................................................................................... 4
1.2 Safety ................................................................................................................................................................ 4
1.2.1 Danger levels and safety symbols ............................................................................................................... 4
1.2.2 User safety .................................................................................................................................................... 5
1.2.3 Protection of the environment..................................................................................................................... 6
1.2.4 Sites exposed to ionizing radiations............................................................................................................ 6
2Handling and Storage............................................................................................................................................... 7
2.1 Handling of the packed unit ............................................................................................................................ 7
2.2 Unit inspection upon delivery.......................................................................................................................... 7
2.3 Unit handling .................................................................................................................................................... 8
2.4 Storage ............................................................................................................................................................. 9
3Technical Description .............................................................................................................................................10
3.1 Designation ....................................................................................................................................................10
3.2 Data plate ....................................................................................................................................................... 10
3.3 Identification code .........................................................................................................................................11
3.4 Names of the main components ................................................................................................................... 12
3.5 Intended use...................................................................................................................................................13
3.6 Improper use ..................................................................................................................................................13
3.7 Use in water distribution networks for human consumption .......................................................................14
4Installation ............................................................................................................................................................... 15
4.1 Precautions ..................................................................................................................................................... 15
4.2 Installation area .............................................................................................................................................. 15
4.2.1 Permitted positions ....................................................................................................................................16
4.2.2 Float adjustment.........................................................................................................................................16
4.3 Hydraulic connection ..................................................................................................................................... 17
4.3.1 Guidelines for the hydraulic system ..........................................................................................................17
4.4 Electrical connection...................................................................................................................................... 19
4.4.1 Ground........................................................................................................................................................ 19
4.4.2 Guidelines for electrical connection.......................................................................................................... 19
4.4.3 Guidelines for the control electric panel...................................................................................................20
4.4.4 Operation with frequency converter .........................................................................................................20
5Use and operation ..................................................................................................................................................21
5.1 Precautions ..................................................................................................................................................... 21
5.2 Rotation direction check (three-phase motors) ............................................................................................21
5.2.1 Wrong rotation direction ...........................................................................................................................21
5.3 Starting and stopping .................................................................................................................................... 22

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SCUBA – Additional Installation, Operation and Maintenance Instructions 3
6Maintenance ............................................................................................................................................................ 23
6.1 Precautions ..................................................................................................................................................... 23
6.2 Maintenance every 6 months of operation, or at the end of the season.....................................................23
6.3 Anode maintenance.......................................................................................................................................23
6.4 Long periods of inactivity...............................................................................................................................24
6.5 Spare parts ordering ......................................................................................................................................24
7Troubleshooting......................................................................................................................................................25
7.1 Precautions ..................................................................................................................................................... 25
7.2 The unit does not start ...................................................................................................................................25
7.3 There is little or no flow rate and/or pressure............................................................................................... 25
7.4 The unit starts up too frequently (automatic start/stop)...............................................................................26
7.5 The unit never stops (automatic start/stop) .................................................................................................. 26
7.6 The differential protection device (RCD) is activated...................................................................................26
7.7 The thermal overload protection triggers or the fuses blow .......................................................................26
7.8 The thermal overload protection triggers..................................................................................................... 27
7.9 Excessive anode consumption ...................................................................................................................... 27
7.10 The unit produces excessive noise and/or vibrations ..................................................................................27
7.11 The frequency converter is in error mode or turned off...............................................................................27
8Technical Information .............................................................................................................................................28
8.1 Operating environment .................................................................................................................................28
8.2 Maximum head............................................................................................................................................... 28
8.3 Maximum operating pressure .......................................................................................................................29
8.4 Maximum number of starts per hour............................................................................................................. 29
8.5 Mechanical characteristics .............................................................................................................................29
8.6 Electrical specifications .................................................................................................................................. 29
8.7 Sound pressure .............................................................................................................................................. 30
8.8 Materials in contact with the liquid ............................................................................................................... 30
9Disposal...................................................................................................................................................................31
9.1 Precautions ..................................................................................................................................................... 31
10 Declarations........................................................................................................................................................32
10.1 EC Declaration of Conformity (Original) .......................................................................................................32
10.2 EU Declaration of Conformity (n. EMCD36)..................................................................................................32
10.3 EU Declaration of Conformity (n. EMCD08)..................................................................................................33
11 Warranty ............................................................................................................................................................. 34
11.1 Information .....................................................................................................................................................34

en – Original instructions
4 SCUBA – Additional Installation, Operation and Maintenance Instructions
1Introduction and Safety
1.1 Introduction
Purpose of this manual
This manual provides information on how to do the following in the correct manner:
•Installation
•Operation
•Maintenance.
CAUTION:
This manual is an integral part of the unit. Make sure to have read and understood the manual
before installing the unit and putting it to use. The manual must always be made available to
the user, stored in the proximity of the unit, and well kept.
Supplementary instructions
The instructions and warnings of this manual apply to the standard unit as described in the sale
documentation. Special version pumps may be supplied with supplementary instruction
manuals. For situations not considered in the manual or in the sales document, contact Xylem
or the Authorised Distributor.
1.2 Safety
1.2.1 Danger levels and safety symbols
Before using the unit, the user must read, understand and comply with the indications of the
danger warnings in order to avoid the following risks:
•Injuries and health hazards
•Damage to the product
•Unit malfunction.
Danger levels
Hazard level
Indication
DANGER:
It identifies a dangerous situation which, if not avoided,
causes serious injury, or even death.
WARNING:
It identifies a dangerous situation which, if not avoided, may
cause serious injury, or even death.
CAUTION:
It identifies a dangerous situation which, if not avoided, may
cause small or medium level injuries.
NOTICE:
It identifies a situation which, if not avoided, may cause
damage to property but not to people.

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SCUBA – Additional Installation, Operation and Maintenance Instructions 5
Complementary symbols
Symbol
Description
Electrical hazard
Hot surface hazard
Danger, system pressurized
Do not use flammable liquids
Do not use corrosive liquids
Protect against freezing
Read the instruction manual
1.2.2 User safety
Strictly comply with current health and safety regulations.
WARNING:
This unit must be used only by qualified users. Qualified users are people able to recognise
the risks and avoid hazards during installation, use and maintenance of the unit.
Inexperienced users
WARNING:
•
For EU countries: this product may be used by children aged 8 years and above and
persons with reduced physical, sensory or mental capabilities, or who lack experience and
knowledge, provided that they are being supervised and have been instructed on how to
use it safely, and understand the hazards involved. Children must not play with the product.
Cleaning and maintenance must not be carried out by children without supervision.
•
For countries outside the EU: this product is not intended for use by persons (including
children) with reduced physical, sensory or mental capabilities, or who lack experience and
knowledge, unless they are being supervised and have been instructed on how to use it by
a person responsible for their safety. Children should be supervised to ensure that they do
not play with the product.

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6 SCUBA – Additional Installation, Operation and Maintenance Instructions
1.2.3 Protection of the environment
Disposal of packaging and product
Comply with the current regulations on sorted waste disposal.
Leaking of fluid
The unit contains a small quantity of lubricant oil: always put in place the necessary measures
to ensure that any spilled lubricant does not disperse in the environment.
WARNING:
It is prohibited to dispose of lubricating fluids and other hazardous substances in the
environment.
1.2.4 Sites exposed to ionizing radiations
WARNING: Ionizing radiation hazard
If the unit has been exposed to ionizing radiations, implement the necessary safety measures
for the protection of people. If the unit needs to be despatched, inform the carrier and the
recipient accordingly, so that appropriate safety measures can be put in place.

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SCUBA – Additional Installation, Operation and Maintenance Instructions 7
2Handling and Storage
2.1 Handling of the packed unit
WARNING: Crushing hazard (limbs)
The unit and its components may be heavy: risk of crushing.
WARNING:
Always wear
personal protective equipment.
WARNING:
Check the gross weight marked on the packaging.
WARNING:
Handle the unit in compliance with the current regulations on "manual load handling", to avoid
undesirable ergonomic conditions causing risks of
back-spine injury.
WARNING:
Take appropriate measures during transport, installation and storage to prevent contamination
from external substances.
The Manufacturer delivers the unit and its components in a cardboard box.
2.2 Unit inspection upon delivery
Inspect the package
1. Check that quantity, descriptions and product codes match the order.
2. Check the packaging for any damage or missing components.
3. In case of immediately detectable damage or missing parts:
- accept the goods with reserve, indicating any findings on the transport document, or
- reject the goods, indicating the reason on the transport document.
In both cases, promptly contact Xylem or the Authorised Distributor from whom the product
was purchased.
Unpacking and inspection of the unit
CAUTION: Cut and abrasion hazard
Always wear personal protective equipment.
1. Remove packing materials from the product.
2. Check the unit for integrity and to make sure that there are no missing components.
3. In case of damage or missing components, promptly contact Xylem or the Authorised
Distributor.

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8 SCUBA – Additional Installation, Operation and Maintenance Instructions
2.3 Unit handling
Lift the unit by attaching a rope to the lifting ring.
DANGER: Electrical hazard
Holding the unit by the power supply cord or the float is strictly forbidden.
WARNING:
Use cranes, ropes, lifting straps, hooks and clasps that comply with current regulations and that
are suitable for the specific use.
NOTICE:
Make sure that the harnessing does not hit and/or damage the unit.
WARNING:
Lift and handle the
unit slowly to avoid stability issues.
WARNING:
During handling, make sure to avoid injury to people and animals, and/or damage to property.

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SCUBA – Additional Installation, Operation and Maintenance Instructions 9
2.4 Storage
Storage of the packed unit
The unit must be stored:
•In a covered and dry place
•Away from heat sources
•Protected from dirt
•Protected from vibrations
•At an ambient temperature between -5°C and +60°C (23°F and 140°F), and relative
humidity between 5% and 95%.
NOTICE:
Do not place heavy loads on top of the unit.
NOTICE:
Protect the unit from collisions.
Long-term storage of the unit
1. Keep the unit in the vertical position and empty it completely through the filter.
2. Follow the same instructions for the storage of the packed unit.
For further information about preparation for long-term storage, please contact Xylem or the
Authorised Distributor.

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10 SCUBA – Additional Installation, Operation and Maintenance Instructions
3Technical Description
3.1 Designation
Multistage close-coupled submersible pump unit with threaded port.
3.2 Data plate
Position
number
Description
Position
number
Description
1
Pump unit type
9
Speed
2
Pump unit code
10
Maximum liquid temperature
3
Flow
11
Maximum ambient temperature
4
Head
12
Maximum operating pressure
5
Minimum head
13
Minimum efficiency index MEI
6
Rated output
14
Maximum immersion depth
7
Motor characteristics
15
Serial number + manufacturing date
8
Weight
-
-

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SCUBA – Additional Installation, Operation and Maintenance Instructions 11
3.3 Identification code
Position
number
Description
Notes
1
Rated flow rate, m3/h
2
Series
SC = Scuba
3
Version
Empty = standard
D = DRY
DS = DRY submersible
4
Number of impeller
5
Rated motor power, kW x 10
6
Frequency Hz
5 = 50 Hz
6 = 60 Hz
7
Power supply and capacitor
C = single-phase with internal capacitor
Q = single-phase with external capacitor
T = three-phase
8
Float
Empty = without float
G = with float
9
Cable length, m
10
Plug type
Empty = not included
DE = German, CEE 7-VII, DIN49441-2-AR2
UK = British, BS 1363-I
AU = Australian, AS/NZS 3112
11
Certification for use with drinking water
Empty = none
W = WRAS
Marks of safety approval
For products with a mark of electrical-related safety approval such as IMQ, TUV, IRAM, etc., the
approval refers exclusively to the pump unit.
Scuba_M0006_B_sc
1S C 9 / / 5 C GL2 D E
00 9
113 1 15 16 17 1 2 4 1 110 1118 19

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12 SCUBA – Additional Installation, Operation and Maintenance Instructions
3.4 Names of the main components
Position
number
Description
Position
number
Description
1
Float (optional)
10
Sleeve
2
Lower bracket
11
Capacitor
3
Diffuser
12
Upper bearing support
4
Impeller
13
Shaft and bearings
5
Bush bearing bracket
14
Stator casing
6
Floater adjustment clip
15
Lower bearing support
7
Lifting ring
16
Internal mechanical seal (oil chamber)
8
Power supply cord
17
External mechanical seal
9
Discharge port
18
Filter
18
112
114
116
1
17
1
18
113
11
1
10
1
11
1
15
1
2
1
3
14
1
5
Scuba_M0004_B_ds
17
1
9
16

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SCUBA – Additional Installation, Operation and Maintenance Instructions 13
3.5 Intended use
•Water supply from first collection tanks, wells for domestic use, basins and water streams
•Irrigation
•Pressure boosting systems
•Rain water collection tanks
•Vehicle washing systems
•Craft pressure boosting systems
•Air purification and humidification
•Water filtering and recycling systems.
Observe the operating limits in Technical Information on page 28.
Pumped liquids
•Clean
•Free of solid particles or fibres
•Chemically and mechanically non aggressive
•Non-flammable.
3.6 Improper use
WARNING:
The unit was designed and built for the use described in the Intended Use section. Any other
uses are prohibited, as they could compromise the
safety of the user and the efficiency of the
unit itself.
DANGER:
It is prohibited to use this unit to pump flammable and/or explosive liquids.
DANGER: Potentially explosive atmosphere hazard
It is prohibited to start the unit in
environments with potentially explosive atmospheres or with
combustible dusts.
Examples of improper use
•Pumping liquids not compatible with the construction materials of the unit
•Pumping hazardous, toxic, explosive, flammable or corrosive liquids
•Pumping drinking liquids other than water, for example wine or milk
•Pumping liquids containing abrasive, solid, or fibrous substances
•Using the unit for flow rates exceeding the flow rate indicated in the data plate.
Examples of improper installation
•Explosive and corrosive atmospheres.

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14 SCUBA – Additional Installation, Operation and Maintenance Instructions
3.7 Use in water distribution networks for human consumption
If the unit is intended for water supply to people and/or animals:
WARNING:
It is prohibited to pump drinking water after use with other fluids.
WARNING:
Take appropriate measures during transport, installation and storage to prevent contamination
from external substances.
WARNING:
Remove the unit from its packaging just before installation to prevent contamination from
external substances.
WARNING:
After installation, run the unit for a few minutes with several users open in order to wash the
inside of the system.

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SCUBA – Additional Installation, Operation and Maintenance Instructions 15
4Installation
4.1 Precautions
Before starting, make sure that the safety instructions shown in Introduction and Safety on
page 4 have been fully read and understood.
DANGER:
All the hydraulic and electrical connections must be completed by a technician possessing the
technical
-professional requirements outlined in the current regulations.
DANGER:
Potentially explosive atmosphere hazard
It is prohibited to start the unit in environments with potentially explosive atmospheres or with
combustible dusts.
WARNING:
Always wear personal protective equipment.
WARNING:
Always use suitable
working tools.
WARNING:
When selecting the place of installation and connecting the unit to the hydraulic and electric
power supplies, strictly comply with current regulations.
NOTICE:
In case of outdoor installation, ensure protection from frost.
When connecting the unit to a public or private aqueduct, or to a well for the supply of water
for human and/or animal consumption, see Use in water distribution networks for human
consumption on page 14.
4.2 Installation area
1. Follow the provisions in Operating environment on page 28.
2. Remove any solid sediments found.
3. Check that the well or the tank are of appropriate size for housing the unit, with an even
perimeter without obstacles.
4. Check that the sizes of the well/tank do not hinder the free movement of the float, if
present.

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16 SCUBA – Additional Installation, Operation and Maintenance Instructions
4.2.1 Permitted positions
4.2.2 Float adjustment
If present, the float switch controls the automatic start and stop of the unit. To change its
action:
1. Loosen the floater adjustment clip screw.
2. Adjust the length of the float cable:
•short: decrease the distance between minimum and maximum level, more frequent
starts and stops.
•long: increase the distance between minimum and maximum level, less frequent starts
and stops.
3. Tighten the screw.
Tightening torque: 1.5 Nm (13 lbf·in).
NOTICE:
The cable length must not be less than 19 cm (7 in).

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SCUBA – Additional Installation, Operation and Maintenance Instructions 17
4.3 Hydraulic connection
DANGER:
All the hydraulic and electrical connections must be completed by a technician possessing the
technical
-professional requirements outlined in the current regulations.
DANGER: Electrical hazard
Holding the unit by the power supply cord or the float is strictly forbidden.
WARNING:
Piping must be sized to ensure safety at the maximum operating pressure.
WARNING:
Install appropriate seals between the unit couplings and the pipings.
4.3.1 Guidelines for the hydraulic system
1. Connect the piping to the unit discharge port:
a) In case of metal piping, this should be screwed directly to the port;
b) In case of plastic piping, use an adapter.
2. Install a check valve on the piping, at least 2 m (7 ft) from the unit, and then one every 10 m
(33 ft).
3. Make a 3 mm (1/8”) relief hole 10 cm (3.9 in) from the discharge port.
4. Secure the power supply cord to the piping with nylon ties at distances of 3 m (10 ft) from
each other, keeping it loose from one tie and the next, to avoid it being pulled in case of
piping expansion.
5. Secure a rope made of non-perishable material to the lifting ring.
6. Lower the unit in the well/tank holding it with the rope.
7. Position the unit:
•At the centre of the well/tank
•Submerged in the liquid at a depth of at least 15 cm (6 in)
•At a maximum depth of 17 m (56 ft) from the maximum level of the liquid
•At a minimum distance of 50 cm (20 in) from the bottom of the well/tank
•With at least 3 m (10 ft) of power supply cord out of the liquid
•With the float, if installed, at least 5 cm (2 in) from the wall of the well/tank.

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18 SCUBA – Additional Installation, Operation and Maintenance Instructions
The figure shows a typical installation.
Position
number
Description
Position
number
Description
L1
Minimum level
7
Electric power supply cord
L2
Maximum level
8
Control panel
1
Float
9
Bleed valve
2
Check valve
10
Pressure gauge
3
Nylon tie
11
Start and stop device
4
Piping
12
Diaphragm tank
5
Lifting rope
13
Gate valve
6
Unit
-
-
NOTICE:
In the operating position, the unit, the piping, the electric power supply cord and the
lifting
rope must never be in contact with the walls of the well/tank.

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SCUBA – Additional Installation, Operation and Maintenance Instructions 19
4.4 Electrical connection
DANGER:
All the hydraulic and electrical connections must be
completed by a technician possessing the
technical
-professional requirements outlined in the current regulations.
DANGER: Electrical hazard
Before starting work, check that the unit is unplugged and that the pump unit, the control
panel and the
auxiliary control circuit cannot restart, even unintentionally.
4.4.1 Ground
DANGER: Electrical hazard
Always connect the external protection conductor (ground) to the ground terminal before
attempting to make any other electrical connections.
DANGER: Electrical hazard
Connect the
pump unit and any electric accessories to a socket with protection conductor
(ground).
DANGER: Electrical hazard
Check that the external protection conductor (ground) is longer than the phase conductors; In
case of accidental disconnection of the unit from the phase conductors, the protection
conductor must be the last one to detach itself from the terminal.
DANGER: Electrical hazard
Install suitable systems for protection against indirect contact, in order to prevent lethal electric
shocks.
4.4.2 Guidelines for electrical connection
1. Check that:
•The mains voltage and frequency match the specifications on the data plate
•The power supply cord is protected from high temperatures, vibrations, collisions and
abrasions.
2. Check that the power supply line is provided with:
•A short circuit protection device of appropriate size
•A mains disconnection device with contact opening distance ensuring complete
disconnection for overvoltage III category conditions
•For use in swimming pools, garden ponds or similar, and only when inside there are no
people or animals, a residual current earth leakage switch (I∆N) ≤ 30 mA
•If it is not possible to visually check the level of the liquid, install a system for protection
against dry run connected to a pressure switch (or float, probes, or other suitable
devices)
•In case of permanent installation, install an RCCB earth leakage switch with tripping
current ≤ 30 mA.
Overtemperature protection - single-phase motor unit
DANGE
R: Electrical hazard
Connect the plug to a socket with protection conductor (earth).

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20 SCUBA – Additional Installation, Operation and Maintenance Instructions
The unit is equipped with built-in capacitor and motor protector, and stops automatically in
case of overtemperature.
After 2-4 minutes the motor protector gives the restart consent.
Overtemperature protection - three-phase motor unit
Install an appropriate motor protector in the control panel, with D curve in accordance with the
current shown in the data plate.
Motor without automatic reset thermal overload protection
1. If the motor is used with full load, then set the value to the nominal current value on the
data plate.
2. If the motor is used with partial load, then set the value of the operating current measured
with a current pincer.
4.4.3 Guidelines for the electrical control panel
NOTICE:
The electric panel must match the ratings on the data plate. Improper combinations could
damage the motor.
•Install appropriate devices for protecting the motor from overloads and short circuits:
Motor
Safety features
Single-phase
•
Automatic reset thermal-ampere protection, built-in (motor protector)
• From short circuit, by the installer: aM fuses (motor start-up), or thermal magnetic switch
with C curve and Icn ≥ 4.5 kA, or other similar device.
Three-phase
•
Thermal, by the installer: trip class 10 A overload thermal relay + aM fuses (motor start-
up), or start class 10 A motor protection thermal magnetic switch
• From short circuit, by the installer: aM fuses (motor start-up), or thermal magnetic switch
with C curve and Icn ≥ 4.5 kA, or other similar device.
•If required, install phase failure sensitive thermal relays.
4.4.4 Operation with frequency converter
Single-phase and three-phase motors can be connected to a frequency converter for speed
control.
•The converter exposes the insulation of the motor to a greater load, determined by the
length of the connecting cable: observe the requirements of the Manufacturer of the
frequency converter
•The minimum frequency must not fall below 25 Hz
•The head of the unit must never be below 2 m (6.5 ft)
•For applications requiring silent operation, install an outlet filter between the motor and the
converter; a sinusoidal filter can reduce the noise even further
•The conditions of installation must guarantee protection against voltage peaks between the
terminals and/or dV/dt in the table:
Motor size
Voltage peak, V
dV/dt, V/µs
up to 90R (500 V)
< 650
< 2200
from 90R to 180R
< 1400
< 4600
over 180R
< 1600
< 5200
Otherwise, use a motor with reinforced insulation1and a sinusoidal filter.
1
Available on request