Xylem Lowara Scuba Dry Series Manual

Additional Installation, Operation
and Maintenance Instructions
SCUBA DRY Series

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2 SCUBA DRY – 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 ............................................................................................................................................................. 8
3Technical Description .............................................................................................................................................10
3.1 Designation ....................................................................................................................................................10
3.2 Denomination of the models.........................................................................................................................10
3.3 Data plate ....................................................................................................................................................... 10
3.4 Identification code .........................................................................................................................................11
3.5 Names of the main components ................................................................................................................... 12
3.6 Intended use...................................................................................................................................................13
3.7 Improper use ..................................................................................................................................................13
3.8 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
4.3 Hydraulic connection ..................................................................................................................................... 16
4.3.1 Connecting surface units ........................................................................................................................... 16
4.3.2 Connecting submerged units ....................................................................................................................20
4.4 Electrical connection...................................................................................................................................... 22
4.4.1 Ground........................................................................................................................................................ 22
4.4.2 Guidelines for electrical connection.......................................................................................................... 23
4.4.3 Guidelines for the electrical control panel................................................................................................24
4.4.4 Operation with frequency converter .........................................................................................................24
5Use and operation ..................................................................................................................................................25
5.1 Precautions ..................................................................................................................................................... 25
5.2 Initial start-up.................................................................................................................................................. 26
5.2.1 Surface unit................................................................................................................................................. 26

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SCUBA DRY – Additional Installation, Operation and Maintenance Instructions 3
5.2.2 Submerged unit.......................................................................................................................................... 26
5.3 Rotation sense check (three-phase motors).................................................................................................. 26
5.3.1 Wrong rotation direction ...........................................................................................................................26
5.4Stopping .........................................................................................................................................................26
6Maintenance............................................................................................................................................................ 27
6.1 Precautions ..................................................................................................................................................... 27
6.2 Surface unit maintenance .............................................................................................................................. 27
6.3 Submerged unit maintenance ....................................................................................................................... 28
6.4 Long periods of inactivity............................................................................................................................... 28
6.5 Spare parts ordering ......................................................................................................................................28
7Troubleshooting......................................................................................................................................................29
7.1 Precautions ..................................................................................................................................................... 29
7.2 The unit does not start ...................................................................................................................................29
7.3 There is little or no flow rate and pressure.................................................................................................... 30
7.4 The unit starts too frequently (automatic start/stop) .................................................................................... 30
7.5 The unit never stops (automatic start/stop) .................................................................................................. 31
7.6 The differential protection device (RCD) is activated...................................................................................31
7.7 The unit stops and starts cyclically, single-phase version ............................................................................31
7.8 The motor protector in the panel has tripped, three-phase version ...........................................................32
7.9 The unit produces excessive noise and/or vibrations ..................................................................................32
7.10 The frequency converter is in error mode or turned off............................................................................... 32
8Technical Information .............................................................................................................................................33
8.1 Operating environment .................................................................................................................................33
8.2 Maximum head............................................................................................................................................... 33
8.3 Maximum operating pressure PN..................................................................................................................34
8.4 Maximum number of starts per hour............................................................................................................. 34
8.5 Mechanical characteristics ............................................................................................................................. 34
8.6 Electrical specifications .................................................................................................................................. 35
8.7 Sound pressure .............................................................................................................................................. 35
8.8 Materials in contact with the liquid ............................................................................................................... 35
9Disposal...................................................................................................................................................................36
9.1 Precautions ..................................................................................................................................................... 36
9.2 WEEE 2012/19/EU (50 Hz) ............................................................................................................................ 36
10 Declarations........................................................................................................................................................ 37
10.1 EC Declaration of Conformity (Original) .......................................................................................................37
10.2 EU Declaration of Conformity (n. 36) ............................................................................................................38
11 Warranty ............................................................................................................................................................. 39
11.1 Information .....................................................................................................................................................39

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4 SCUBA DRY – 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. Be sure to read and understand 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 DRY – 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 DRY – 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 dispatched, inform the carrier and the
recipient accordingly, so that appropriate safety measures can be put in place.

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SCUBA DRY – 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 DRY – 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
switch 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.
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%.

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SCUBA DRY – Additional Installation, Operation and Maintenance Instructions 9
NOTICE:
Do not place heavy loads on top of the unit.
NOTICE:
Protect the unit from collisions.
Long-term storage of the unit
1. Remove the drain plug.
2. Completely empty the unit.
3. Close the plug.
4. 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 DRY – Additional Installation, Operation and Maintenance Instructions
3Technical Description
3.1 Designation
Multistage close-coupled pump unit with threaded port.
3.2 Denomination of the models
Model
Description
SCD
Surface pump unit
SCDS
Surface and submersible pump unit
3.3 Data plate

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SCUBA DRY – Additional Installation, Operation and Maintenance Instructions 11
1. Pump unit type
2. Product code
3. Flow
4. Head
5. Minimum head
6. Rated output
7. Motor characteristics
8. Weight
9. Speed
10. Maximum liquid temperature
11. Maximum ambient temperature
12. Maximum operating pressure
13. Minimum efficiency index
14. Maximum immersion depth
15. Serial number + manufacturing date
3.4 Identification code
1. Flow rate in m3/h
2. Scuba series [SC]
3. Surface model [D] or surface and submersible model [DS] with stainless steel base
4. Number of impeller
5. Rated motor power in kWx10
6. Frequency 50 Hz [5] or 60 Hz [6]
7. Power supply: single-phase with internal capacitor [C], single-phase with external capacitor [Q] or three phase [T]
8. Float switch: included [G] or not included [ ]
9. Cable length in m
10. German plug CEE 7-VII DIN49441-2-AR2 [DE], British plug BS 1363-I [UK], Australian plug AS/NZS 3112 [AU], or no
plug included []
11. Certification for use with drinking water [W] or none [ ]
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_dry_M0006_A_sc
1 S C 9 / / 5 C L 2 D E
00 9D W
113 11
51
6 1
12 4 1 1
10 111
8 1
9
7

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12 SCUBA DRY – Additional Installation, Operation and Maintenance Instructions
3.5 Names of the main components
Scuba_Dry_M0004_A_ds
11
1
2
1
15
14
15
16
111
1
14
17
18
19
117
119
116
120
121
122
123
110
124
13
113
118
1
12
1. Power supply cord
2. Discharge port
3. Upper head
4. Upper bearing support
5. Shaft and bearings
6. Stator casing
7. Lower bearing support
8. Internal mechanical seal (oil
chamber)
9. External mechanical seal
10. Suction port
11. Lifting ring
12. Vent plug
13. Head
14. Floater adjustment clip
15. Capacitor
16. Float switch (optional)
17. Sleeve
18. Seal housing
19. Diffuser
20. Impeller
21. Pump body
22. Drain plug
23. Base
24. Bush (1SC, 3SC, 6 to 9 stages 5SC,
and 5 to 6 stages 8SC models only)

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SCUBA DRY – Additional Installation, Operation and Maintenance Instructions 13
3.6 Intended use
•Water supply from collection tanks for domestic use
•Irrigation
•Pressure boosting systems
•Rain water collection tanks
•Vehicle washing systems
•Systems subjected to water jet
•Craft pressure boosting systems
•Air purification and humidification
•Installation in the following environments:
−Small and without ventilation
−Subjected to the risk of temporary flooding
−Requiring silent operation.
Observe the operating limits in Technical Information on page 33.
Pumped liquids
•Clean
•Free of solid particles or fibres
•Chemically and mechanically non aggressive
•Non-flammable.
3.7 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
−Hazardous, toxic, explosive, flammable or corrosive liquids
−Drinking liquids other than water, for example wine or milk
−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 DRY – Additional Installation, Operation and Maintenance Instructions
3.8 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 dri
nking 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 DRY – Additional Installation, Operation and Maintenance Instructions 15
4Installation
4.1 Precautions
Before starting the works, make sure that the 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 of the system and the unit 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
The unit may be installed:
•On the surface, SCD and SCDS models
•Submerged, SCDS models only.
Follow the provisions in Operating environment on page 33.

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16 SCUBA DRY – Additional Installation, Operation and Maintenance Instructions
4.2.1 Permitted positions
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
switch is strictly forbidden.
WARNING:
Piping must be sized to ensure safety at the maximum operating pressure.
WARNING:
Install appropriate seals between the unit and the piping system.
4.3.1 Connecting surface units
Preliminary operations
1. Position the unit as close as possible to the liquid being pumped.
2. Secure the unit to a concrete or metal foundation base sufficiently strong to ensure
permanent and sturdy support.
General guidelines
1. Remove any welding residues, deposits and impurities in the piping system to avoid
damage to the unit. If necessary, install a filter on the suction side.
2. Connect the piping system to the suction and discharge ports:
a) Metal piping systems should be screwed directly to the port;
b) In case of plastic piping, use an adapter.

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SCUBA DRY – Additional Installation, Operation and Maintenance Instructions 17
3. Support the pipes independently to prevent them from weighing on the unit.
4. Install appropriate seals between the unit and the piping system connections.
5. Check the piping system for perfect tightness.
Suction pipe
1. Suction pipes exceeding 10 m in length (33 ft) must have a larger diameter than the suction
port.
2. Flexible piping systems must have a reinforced spiral to prevent contraction in case of
depression.
3. In case of suction lift installation:
•The piping system must have an increasing slope towards the unit exceeding 2%; to
avoid air pockets
•Install a foot check valve with suction strainer, making sure that it is always submerged.
4. In case of positive suction head installation, install:
•An on-off valve
•An Inspectionable filter.
Discharge pipe
1. Install a check valve on the piping system, at least 2 m (7 ft) from the unit, followed by one
every 10 m (33 ft) of geodetic level difference.
2. Install a pressure gauge for checking the actual operating pressure of the unit.
3. Install an on-off valve, downstream from the check valve and pressure gauge, to regulate
the flow rate.
4. Install a diaphragm tank to limit the number of starts, stabilise the operating pressure and
reduce the pressure peak caused by water hammer effects.

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18 SCUBA DRY – Additional Installation, Operation and Maintenance Instructions
Figure 1: Surface unit, example of suction lift installation
1. Diaphragm tank
2. Bleed valve
3. Start and stop device
4. Control panel
5. Pressure gauge
6. Check valve
7. Fill plug
8. Electric power supply cord
9. Discharge pipe
10. Unit
11. On-off valve
12. Fill plug
13. Suction pipe
14. Bottom valve
15. Suction strainer

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SCUBA DRY – Additional Installation, Operation and Maintenance Instructions 19
Figure 2: Surface unit, example of positive suction head installation
1. Diaphragm tank
2. Bleed valve
3. Start and stop device
4. Control panel
5. Pressure gauge
6. Check valve
7. Fill plug
8. Electric power supply cord
9. Discharge pipe
10. Unit
11. On-off valve
12. On-off valve
13. Suction pipe
14. Filter

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20 SCUBA DRY – Additional Installation, Operation and Maintenance Instructions
4.3.2 Connecting submerged units
Preliminary operations
1. Check that the tank or the basin are of appropriate size for housing the unit, with an even
perimeter without obstacles.
2. Check that the sizes of the tank/basin do not hinder the free movement of the float switch
and the float suction filter, if present.
Guidelines
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 tank/basin holding it with the rope.
7. Position the unit:
•At the centre of the tank/basin
•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
•With at least 3 m (10 ft) of power supply cord out of the liquid
•With the float switch, if installed, at least 5 cm (2 in) from the wall of the tank/basin
•With the float suction filter, if installed, below the water level.