FLYGT Flygt 3069 User manual

Installation, Operation, and
Maintenance Manual
885842_10.0
Flygt 3069

Table of Contents
1 Introduction and Safety..............................................................................................................3
1.1 Introduction.......................................................................................................................... 3
1.2 Safety terminology and symbols........................................................................................3
1.3 User safety.............................................................................................................................4
1.4 Ex-approved products.........................................................................................................4
1.5 Special hazards.....................................................................................................................5
1.5.1 Biological hazards.........................................................................................................5
1.5.2 Wash the skin and eyes................................................................................................6
1.6 Protecting the environment................................................................................................6
1.7 End of life product disposal................................................................................................6
1.8 Spare parts............................................................................................................................6
1.9 Warranty................................................................................................................................7
2 Transportation and Storage...................................................................................................... 8
2.1 Examine the delivery........................................................................................................... 8
2.1.1 Examine the package................................................................................................... 8
2.1.2 Examine the unit............................................................................................................8
2.2 Transportation guidelines...................................................................................................8
2.2.1 Precautions.................................................................................................................... 8
2.2.2 Lifting..............................................................................................................................8
2.3 Temperature ranges for transportation, handling and storage...................................10
2.4 Storage guidelines.............................................................................................................10
3 Product Description................................................................................................................. 12
3.1 Pump design...................................................................................................................... 12
3.2 Sensors and monitoring equipment............................................................................... 13
3.3 The data plate.................................................................................................................... 14
3.4 Approvals............................................................................................................................15
3.5 Product denomination...................................................................................................... 16
4 Installation................................................................................................................................. 17
4.1 Precautions......................................................................................................................... 17
4.1.1 Hazardous atmospheres............................................................................................ 17
4.1.2 Install the pump.......................................................................................................... 18
4.2 Make the electrical connections...................................................................................... 20
4.2.1 General precautions...................................................................................................20
4.2.2 Grounding (earthing) ................................................................................................ 22
4.2.3 Prepare the SUBCAB™cables................................................................................... 22
4.2.4 Connect the motor cable to the pump.................................................................... 24
4.2.5 Connect the motor cable to the starter and monitoring equipment................... 24
4.2.6 Cable charts.................................................................................................................25
4.3 Check the impeller rotation..............................................................................................33
5 Operation.................................................................................................................................. 34
5.1 Precautions......................................................................................................................... 34
5.2 Estimate zinc anode replacement intervals....................................................................34
5.3 Start the pump....................................................................................................................35
6 Maintenance..............................................................................................................................36
6.1 Precautions......................................................................................................................... 36
Table of Contents
Flygt 3069 Installation, Operation, and Maintenance Manual 1

6.2 Torque values.....................................................................................................................37
6.3 Change the oil....................................................................................................................37
6.4 Service the pump...............................................................................................................40
6.4.1 Inspection.................................................................................................................... 40
6.4.2 Overhaul...................................................................................................................... 41
6.4.3 Service in case of alarm..............................................................................................41
6.5 Replace the D-impeller..................................................................................................... 42
6.5.1 Remove the D-impeller.............................................................................................. 42
6.5.2 Install the D-impeller.................................................................................................. 43
6.6 Replace the F-impeller...................................................................................................... 44
6.6.1 Remove the F-impeller...............................................................................................44
6.6.2 Install the F-impeller...................................................................................................44
6.7 Replace the M-impeller and the cutting wheel..............................................................46
6.7.1 Remove the cutting wheel......................................................................................... 46
6.7.2 Remove the M-impeller..............................................................................................46
6.7.3 Install the M-impeller..................................................................................................47
6.7.4 Install the cutting wheel............................................................................................. 48
6.8 Replace the N-impeller..................................................................................................... 49
6.8.1 Remove the N-impeller..............................................................................................49
6.8.2 Install the N-impeller.................................................................................................. 50
7 Troubleshooting....................................................................................................................... 54
7.1 Electrical troubleshooting.................................................................................................54
7.2 The pump does not start...................................................................................................54
7.3 The pump does not stop when a level sensor is used.................................................. 55
7.4 The pump starts-stops-starts in rapid sequence............................................................56
7.5 The pump runs but the motor protection trips..............................................................56
7.6 The pump delivers too little or no water.........................................................................57
8 Technical Reference.................................................................................................................58
8.1 Motor data.......................................................................................................................... 58
8.1.1 Thermal contacts, opening temperature.................................................................58
8.2 Application limits............................................................................................................... 58
8.3 Minimum permitted liquid level...................................................................................... 58
Table of Contents
2 Flygt 3069 Installation, Operation, and Maintenance Manual

1 Introduction and Safety
1.1 Introduction
Purpose of the manual
The purpose of this manual is to provide the necessary information for working with the
unit. Read this manual carefully before starting work.
Read and keep the manual
Save this manual for future reference, and keep it readily available at the location of the
unit.
Intended use
WARNING:
Operating, installing, or maintaining the unit in any way that is not covered in this manual
could cause death, serious personal injury, or damage to the equipment and the
surroundings. This includes any modification to the equipment or use of parts not
provided by Xylem. If there is a question regarding the intended use of the equipment,
please contact a Xylem representative before proceeding.
Other manuals
See also the safety requirements and information in the original manufacturer's manuals
for any other equipment furnished separately for use in this system.
1.2 Safety terminology and symbols
About safety messages
It is extremely important that you read, understand, and follow the safety messages and
regulations carefully before handling the product. They are published to help prevent
these hazards:
•Personal accidents and health problems
• Damage to the product and its surroundings
• Product malfunction
Hazard levels
Hazard level Indication
DANGER:
A hazardous situation which, if not avoided, will result in
death or serious injury
WARNING:
A hazardous situation which, if not avoided, could result
in death or serious injury
CAUTION:
A hazardous situation which, if not avoided, could result
in minor or moderate injury
NOTICE:
Notices are used when there is a risk of equipment
damage or decreased performance, but not personal
injury.
1 Introduction and Safety
Flygt 3069 Installation, Operation, and Maintenance Manual 3

Special symbols
Some hazard categories have specific symbols, as shown in the following table.
Electrical hazard Magnetic fields hazard
Electrical Hazard: CAUTION:
1.3 User safety
All regulations, codes, and health and safety directives must be observed.
The site
•Observe lockout/tagout procedures before starting work on the product, such as
transportation, installation, maintenance, or service.
• Pay attention to the risks presented by gas and vapors in the work area.
• Always be aware of the area surrounding the equipment, and any hazards posed by
the site or nearby equipment.
Qualified personnel
This product must be installed, operated, and maintained by qualified personnel only.
Protective equipment and safety devices
• Use personal protective equipment as needed. Examples of personal protective
equipment include, but are not limited to, hard hats, safety goggles, protective gloves
and shoes, and breathing equipment.
• Make sure that all safety features on the product are functioning and in use at all times
when the unit is being operated.
1.4 Ex-approved products
Follow these special handling instructions if you have an Ex-approved unit.
Personnel requirements
These are the personnel requirements for Ex-approved products in potentially explosive
atmospheres:
• All work on the product must be carried out by certified electricians and Xylem
authorized mechanics. Special rules apply to installations in explosive atmospheres.
• All users must know about the risks of electric current and the chemical and physical
characteristics of the gas, the vapor, or both present in hazardous areas.
• Any maintenance for Ex-approved products must conform to international and national
standards (for example, IEC/EN 60079-17).
Xylem disclaims all responsibility for work done by untrained and unauthorized personnel.
Product and product handling requirements
These are the product and product handling requirements for Ex-approved products in
potentially explosive atmospheres:
• Only use the product in accordance with the approved motor data.
• The equipment must never run dry during operation. The volute must be filled with
liquid during operation. Dry running during service and inspection is only permitted
outside the classified area.
• Before you start work on the product, make sure that the product and the control
panel are isolated from the power supply and the control circuit, so they cannot be
energized.
• Do not open the product while it is energized or in an explosive gas atmosphere.
1 Introduction and Safety
4 Flygt 3069 Installation, Operation, and Maintenance Manual

• Intrinsically safe circuits are normally required for the automatic level-control system by
the level regulator if mounted in zone 0.
• The yield stress of fasteners must be in accordance with the approval drawing and the
product specification.
• Do not modify the equipment without approval from an Ex-approved Xylem
representative.
• Only use original Xylem spare parts that are provided by an Ex-approved Xylem
representative.
• The thermal contacts that are fitted to the stator windings must be connected correctly
to a separate motor control circuit and in use. The thermal contacts shall be connected
to a monitoring device, which disconnects the power supply immediately upon
activation. This action prevents the rise of temperatures above the temperature value
for the approval classification.
• The width of flameproof joints is more than the values specified in the tables of the EN/
IEC 60079-1 standard. For information contact the manufacturer.
• The gap of flameproof joints is less than the values specified in Table 2 of the EN/
IEC 60079-1 standard. For information contact the manufacturer.
• It is NOT allowed to repair the flameproof joints.
• Ambient temperature: –20°C to 40°C
Guidelines for compliance
Compliance is fulfilled only when you operate the unit within its intended use. Do not
change the conditions of the service without the approval of an Ex-approved Xylem
representative. When you install or maintain explosion proof products, always comply
with the directive and applicable standards (for example, IEC/EN 60079–14).
Minimum permitted liquid level
The approval for explosion proof products is predicated on a minimum permitted liquid
level. See Technical Reference on page 58.
Monitoring equipment
For additional safety, use condition-monitoring devices. Examples of condition-
monitoring devices include, but are not limited to, the following:
• Level indicators
• Temperature detectors in addition to the stator thermal detectors
Any thermal detectors or thermal protection devices delivered with the pump must be
installed and in use at all times.
The site owner is responsible for selection, installation, and proper maintenance of
functional monitoring equipment for motor protection.
1.5 Special hazards
1.5.1 Biological hazards
The product is designed for use in liquids that can be hazardous to your health. Observe
these rules when you work with the product:
• Make sure that all personnel who may come into contact with biological hazards are
vaccinated against diseases to which they may be exposed.
• Observe strict personal cleanliness.
WARNING: Biological Hazard
Infection risk. Rinse the unit thoroughly with clean water before working on it.
1 Introduction and Safety
Flygt 3069 Installation, Operation, and Maintenance Manual 5

1.5.2 Wash the skin and eyes
Follow these procedures for chemicals or hazardous fluids that have come into contact
with your eyes or your skin:
Condition Action
Chemicals or hazardous fluids in
eyes
1. Hold your eyelids apart forcibly with your fingers.
2. Rinse the eyes with eyewash or running water for at least 15 minutes.
3. Seek medical attention.
Chemicals or hazardous fluids on
skin
1. Remove contaminated clothing.
2. Wash the skin with soap and water for at least 1 minute.
3. Seek medical attention, if necessary.
1.6 Protecting the environment
Emissions and waste disposal
Observe the local regulations and codes regarding:
• Reporting of emissions to the appropriate authorities
• Sorting, recycling and disposal of solid or liquid waste
• Clean-up of spills
Exceptional sites
CAUTION: Radiation Hazard
Do NOT send the product to Xylem if it has been exposed to nuclear radiation, unless
Xylem has been informed and appropriate actions have been agreed upon.
1.7 End of life product disposal
Handle and dispose of all waste in compliance with local laws and regulations.
Correct disposal of this product — WEEE Directive on waste electrical and electronic equipment
WS009973A
This marking on the product, accessories or literature indicates that the product should
not be disposed of with other waste at the end of its working life.
To prevent possible harm to the environment or human health from uncontrolled waste
disposal, please separate these items from other types of waste and recycle them
responsibly to promote the sustainable reuse of material resources.
Waste from electrical and electronic equipment can be returned to the producer or
distributor.
1.8 Spare parts
CAUTION:
Only use the manufacturer’s original spare parts to replace any worn or faulty
components. The use of unsuitable spare parts may cause malfunctions, damage, and
injuries as well as void the warranty.
1 Introduction and Safety
6 Flygt 3069 Installation, Operation, and Maintenance Manual

1.9 Warranty
For information about warranty, see the sales contract.
1 Introduction and Safety
Flygt 3069 Installation, Operation, and Maintenance Manual 7

2 Transportation and Storage
2.1 Examine the delivery
2.1.1 Examine the package
1. Examine the package for damaged or missing items upon delivery.
2. Record any damaged or missing items on the receipt and freight bill.
3. If anything is out of order, then file a claim with the shipping company.
If the product has been picked up at a distributor, make a claim directly to the
distributor.
2.1.2 Examine the unit
1. Remove packing materials from the product.
Dispose of all packing materials in accordance with local regulations.
2. To determine whether any parts have been damaged or are missing, examine the
product.
3. If applicable, unfasten the product by removing any screws, bolts, or straps.
Use care around nails and straps.
4. If there is any issue, then contact a sales representative.
2.2 Transportation guidelines
2.2.1 Precautions
DANGER: Crush Hazard
Moving parts can entangle or crush. Always disconnect and lock out power before
servicing to prevent unexpected startup. Failure to do so could result in death or serious
injury.
Position and fastening
The unit can be transported either horizontally or vertically. Make sure that the unit is
correctly fastened during transportation, and cannot roll or fall over.
2.2.2 Lifting
Always inspect the lifting equipment and tackle before starting any work.
WARNING: Crush Hazard
Always lift the unit by its designated lifting points.
Use suitable lifting equipment and ensure that the product is properly harnessed.
Wear personal protective equipment.
Stay clear of cables and suspended loads.
NOTICE:
Never lift the unit by its cables or hose.
2 Transportation and Storage
8 Flygt 3069 Installation, Operation, and Maintenance Manual

Lifting points
The following images show the lifting points for the different installation types. For more
information about the installation types, see Installation on page 17.
WS012839A
Figure 1: P- and X-installation
WS012840A
Figure 2: S- and F-installation
WS012841A
Figure 3: H-installation
Lifting equipment
Lifting equipment is always required to handle the unit. The lifting equipment must fulfill
the following requirements:
• The minimum height between the lifting hook and the floor must be sufficient to lift the
unit. Contact a Xylem representative for more information.
• The lifting equipment must be able to hoist the unit straight up and down, preferably
without the need for resetting the lifting hook.
• The lifting equipment must be correctly anchored and in good condition.
• The lifting equipment must support the weight of the entire assembly. Only authorized
personnel may use the lifting equipment.
• Two sets of lifting equipment must be used to lift the unit for repair work.
• The lifting equipment must be dimensioned to lift the unit with any remaining pumped
media in it.
• The lifting equipment must not be oversized.
CAUTION: Crush Hazard
Over-dimensioned lifting equipment can lead to injury. A site-specific
risk analysis must be done.
2 Transportation and Storage
Flygt 3069 Installation, Operation, and Maintenance Manual 9

2.3 Temperature ranges for transportation, handling and storage
Handling at freezing temperature
At temperatures below freezing, the product and all installation equipment, including the
lifting gear, must be handled with extreme care.
Make sure that the product is warmed up to a temperature above the freezing point
before starting up. Avoid rotating the impeller/propeller by hand at temperatures below
the freezing point. The recommended method to warm the unit up is to submerge it in the
liquid which will be pumped or mixed.
NOTICE:
Never use a naked flame to thaw the unit.
Unit in as-delivered condition
If the unit is still in the condition in which it left the factory - all packing materials are
undisturbed - then the acceptable temperature range during transportation, handling and
storage is: –50°C (–58ºF) to +60°C (+140ºF).
If the unit has been exposed to freezing temperatures, then allow it to reach the ambient
temperature of the sump before operating.
Lifting the unit out of liquid
The unit is normally protected from freezing while operating or immersed in liquid, but
the impeller/propeller and the shaft seal may freeze if the unit is lifted out of the liquid
into a surrounding temperature below freezing.
Follow these guidelines to avoid freezing damage:
1. Empty all pumped liquid, if applicable.
2. Check all liquids used for lubrication or cooling, both oil and water-glycol mixtures, for
the presence of unacceptable amounts of water. Change if needed.
Water-glycol mixtures: Units equipped with an internal closed-loop cooling system are
filled with a mixture of water and 30% glycol. This mixture remains a flowing liquid at
temperatures down to –13°C (9°F). Below –13°C (9°F), the viscosity increases such that the
glycol mixture will lose its flow properties. However, the glycol-water mixture will not
solidify completely and thus cannot harm the product.
2.4 Storage guidelines
Storage location
The product must be stored in a covered and dry location free from heat, dirt, and
vibrations.
NOTICE:
Protect the product against humidity, heat sources, and mechanical damage.
NOTICE:
Do not place heavy weights on the packed product.
Long-term storage
If the unit is stored more than six months, then the following apply:
• Before operating the unit after storage, it must be inspected with special attention to
the seals and the cable entry.
• The impeller/propeller must be rotated every other month to prevent the seals from
sticking together.
2 Transportation and Storage
10 Flygt 3069 Installation, Operation, and Maintenance Manual

Packaging material stacking limit
If the packaging material has an indicated stacking limit, then it is valid for 23°C (73°F) and
50% relative humidity. Depending on the material, other temperature and humidity
ranges can reduce the stacking limit.
2 Transportation and Storage
Flygt 3069 Installation, Operation, and Maintenance Manual 11

3 Product Description
Products included
Pump D-hydraulic F-hydraulic M-hydraulic
(Grinder)
N-hydraulic,
cast iron
N-hydraulic,
Hard-Iron™
N-hydraulic,
stainless steel
3069.060 MT, SH
3069.0701MT, SH
3069.0901LT, MT, HT LT
3069.160 MT, SH
3069.170 HT
3069.180 LT, MT, HT LT
3069.1901MT, SH
3069.760 MT, SH
3069.7701MT, SH
3069.8901HT
1Explosion proof drive unit
Pump-specific information
For the specific weight, current, voltage, power ratings, and speed of the pump, see the
data plate of the pump.
3.1 Pump design
The pump is submersible, and driven by an electric motor. For motor data, see Technical
Reference on page 58.
Intended use
The product is intended for moving waste water, sludge, raw and clean water. Always
follow the limits given in Technical Reference on page 58. If there is a question regarding
the intended use of the equipment, please contact a local sales and service representative
before proceeding.
DANGER: Explosion/Fire Hazard
Special rules apply to installations in explosive or flammable atmospheres. Do not install
the product or any auxiliary equipment in an explosive zone unless it is rated explosion-
proof or intrinsically-safe. If the product is rated explosion-proof or intrinsically-safe, then
see the specific explosion-proof information in the safety chapter before taking any
further actions.
Corrosive liquids
NOTICE:
Do NOT use the unit in highly corrosive liquids.
Pressure classes
LT Low head
MT Medium head
HT High head
SH Super high head
3 Product Description
12 Flygt 3069 Installation, Operation, and Maintenance Manual

Parts
The information describes the product in general. The supplied product can differ on a
detailed level.
WS009131A
1
2
3
4
5
6
7
8
Position Part Description
1 Shaft Stainless steel shaft with integrated rotor
2 Electric motor For more information about the motor, see Motor data on page 58
3 Mechanical seal One stationary and one rotating seal ring
• Aluminum oxide Al2O3
• Carbon CSB
• Corrosion-resistant cemented carbide WCCR
For information, see Parts List.
4 Impeller
5 Pump housing The pump housing includes a coolant that lubricates and cools the seals; the
housing acts as a buffer between the pumped fluid and the drive unit.
6 Main bearing Single-row deep-groove ball bearing
7 Stator housing The pump is cooled by the ambient liquid or air.
8 Support bearing Single-row deep-groove ball bearing
— Screws and nuts Property class 80
See Torque values on page 37.
3.2 Sensors and monitoring equipment
The following applies to the monitoring equipment of the pump:
3 Product Description
Flygt 3069 Installation, Operation, and Maintenance Manual 13

• The stator incorporates three thermal contacts connected in series that activate the
alarm and stops the pump at overtemperature
• The thermal contacts open at 125°C (257°F) or 140°C (284°F). For more information,
see Technical Reference on page 58.
• Ex-approved pumps must have thermal contacts connected to the control panel.
• The sensors must be connected to either the MiniCAS II monitoring equipment or an
equivalent equipment.
• The monitoring equipment must be of a design that makes automatic restart
impossible.
Optional sensors
FLS FLS is a miniature float switch for detection of liquid in the stator housing. Due to its
design it is best suited for pumps in a vertical position. The FLS sensor is installed in
the bottom of the stator housing.
3.3 The data plate
The data plate is a metal label that is located on the main body of the products. The data
plate lists key product specifications. Specially approved products also have an approval
plate.
WS011207A
8
7
6
5
4
1312 14 17 18 1916159 10 11
22
21
20
23
24
2
3125
1. Curve code or Propeller code
2. Serial number
3. Product number
4. Country of origin
5. Additional information
6. Phase; type of current; frequency
7. Rated voltage
8. Thermal protection
9. Thermal class
10.Rated shaft power
11.International standard
12.Degree of protection
13.Rated current
14.Rated speed
15.Maximum submergence
16.Direction of rotation: L=left, R=right
17.Duty class
18.Duty factor
19.Product weight
20.Locked rotor code letter
21.Power factor
22.Maximum ambient temperature
23.Read installation manual
24.Notified body, only for EN-approved Ex products
25.WEEE-Directive symbol
Figure 4: The data plate
3 Product Description
14 Flygt 3069 Installation, Operation, and Maintenance Manual

3.4 Approvals
Product approvals for hazardous locations
Pump Approval
• 3069.070
• 3069.090
• 3069.190
• 3069.770
• 3069.890
European Norm (EN)
• ATEX Directive FM18ATEX0006X
• EN 60079-0:2012/A11:2013, EN 60079-1:2014, EN ISO 80079-36:2016,
EN ISO 80079-37:2016
•II 2 G Ex db h IIB T4 Gb
•II 2 G Ex db h IIB T3 Gb
IEC
• IECEx scheme IECEx_FMG_17.0036X
• IEC 60079-0:2011, IEC 60079-1:2014
• Ex db IIB T3 Gb
• Ex db IIB T4 Gb
FM (FM Approvals)
• Explosion proof for use in Class I, Div. 1, Group C and D
EN approval plate
This illustration describes the EN approval plate and the information that is contained in
its fields.
12
3
5
6 7 89 10
11
12
13
14
WS003972C
4
15
1. Approval
2. Approval authority and
Approval number
3. Approved drive unit
4. Cable entry temperature
5. Stall time
6. Starting current or Rated
current
7. Duty class
8. Duty factor
9. Input power
10.Rated speed
11.Additional information
12.Maximum ambient temperature
13.Serial number
14.ATEX marking
15.Country of origin
IEC approval plate
This illustration describes the IEC approval plate and the information that is contained in
its fields.
International Norm; not for EU member countries.
12
3
5
6 7 89 10
11
12
13
14
4
WS001279D
15
1. Approval
2. Approval authority and
Approval number
3. Approved drive unit
4. Cable entry temperature
5. Stall time
6. Starting current or Rated
current
7. Duty class
8. Duty factor
9. Input power
10.Rated speed
11.Additional information
12.Maximum ambient temperature
13.Serial number
14.ATEX marking
15.Country of origin
3 Product Description
Flygt 3069 Installation, Operation, and Maintenance Manual 15

FM approval plate
This illustration describes the FM approval plate and the information that is contained in
its fields.
1
2WS010564A
1. Temperature class
2. Maximum ambient temperature
3.5 Product denomination
Reading instruction
In this section, code characters are illustrated accordingly:
X = letter
Y = digit
The different types of codes are marked up with a, b and c. Code parameters are marked
up with numbers.
Codes and parameters
XXYYYY YYY YYY YYYY
1234567
a
b
c
WS006265B
.
Type of Callout Number Indication
Type of code a Sales denomination
b Product code
c Serial number
Parameter 1 Hydraulic end
2 Type of installation
3 Sales code
4 Version
5 Production year
6 Production cycle
7 Running number
3 Product Description
16 Flygt 3069 Installation, Operation, and Maintenance Manual

4 Installation
4.1 Precautions
Before starting work, make sure that the safety instructions have been read and
understood.
DANGER: Electrical Hazard
Before starting work on the unit, make sure that the unit and the control panel are isolated
from the power supply and cannot be energized. This applies to the control circuit as well.
DANGER: Inhalation Hazard
Before entering the work area, make sure that the atmosphere contains sufficient oxygen
and no toxic gases.
4.1.1 Hazardous atmospheres
DANGER: Explosion/Fire Hazard
Special rules apply to installations in explosive or flammable atmospheres. Do not install
the product or any auxiliary equipment in an explosive zone unless it is rated explosion-
proof or intrinsically-safe. If the product is rated explosion-proof or intrinsically-safe, then
see the specific explosion-proof information in the safety chapter before taking any
further actions.
General requirements
These requirements apply:
•Use the pump dimensional drawing in order to ensure proper installation.
Before installing the pump, do the following:
• Provide a suitable barrier around the work area, for example, a guard rail.
• Make sure that equipment is in place so that the unit cannot roll or fall over during the
installation process.
• Check the explosion risk before you weld or use electric hand tools.
• Check that the cable and cable entry have not been damaged during transport.
• Always remove all debris and waste material from the sump, inlet piping, and
discharge connection, before you install the pump.
• Always check the impeller rotation before lowering the pump into the pumped liquid.
NOTICE:
Do not run the pump dry.
NOTICE:
Never force piping to make a connection with a pump.
Authority regulation
Vent the tank of a sewage station in accordance with local plumbing codes.
4 Installation
Flygt 3069 Installation, Operation, and Maintenance Manual 17

Pressure restriction
The maximum working pressure must not exceed the value in the approved performance
curve for the pump. A closed valve or a clogged pipe can rapidly build up the pressure. A
motor protector or a relief valve on the discharge line is always recommended.
NOTICE:
Never operate the pump with the discharge line blocked, or the discharge valve closed.
Fasteners
• Only use fasteners of the correct size and material.
• Replace all corroded or damaged fasteners.
• Make sure that all the fasteners are correctly tightened and that there are no missing
fasteners.
4.1.2 Install the pump
These requirements and instructions only apply when the installation is made according
to the dimensional drawing.
1. Run the cable so that it has no sharp bends. Make sure that it is not pinched, and
cannot be sucked into the pump inlet.
2. Install the pump according to the instructions for the installation type.
Where applicable, the installation instructions are included in the mechanical
accessories.
3. Connect the motor cable and the starter and monitoring equipment according to the
separate instructions.
4.1.2.1 F-installation
WS009506A
F Free standing semipermanent, wet well arrangement where the pump is placed on a
firm surface.
The pump is intended to operate completely or partially submerged in the pumped
liquid.
4 Installation
18 Flygt 3069 Installation, Operation, and Maintenance Manual