Grindex 8125.230 Milli Installation and operating instructions

www.grindex.com
Installation, Operation, and Maintenance
8125.230 Milli

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 Special hazards................................................................................4
1.5 Protecting the environment................................................................5
1.6 Spare parts..................................................................................... 5
1.7 Warranty.........................................................................................5
2 Transportation and Storage.............................................................................................. 6
2.1 Inspect the delivery..........................................................................6
2.1.1 Inspect the package....................................................................6
2.1.2 Inspect the unit.......................................................................... 6
2.2 Transportation guidelines...................................................................6
2.2.1 Lifting....................................................................................... 6
2.3 Temperature ranges for transportation, handling and storage................. 7
2.4 Storage guidelines............................................................................7
3 Product Description...........................................................................................................9
3.1 Products included............................................................................. 9
3.2 Pump design....................................................................................9
3.3 Monitoring equipment....................................................................... 9
3.3.1 Level regulators........................................................................ 10
3.4 The data plate................................................................................10
4 Installation........................................................................................................................ 12
4.1 Install the pump.............................................................................12
4.1.1 Install......................................................................................13
4.2 Make the electrical connections........................................................ 14
4.2.1 Connect the motor cable to the pump.......................................... 16
4.2.2 Cable charts............................................................................. 17
4.3 Check the impeller rotation.............................................................. 18
5 Operation.......................................................................................................................... 20
5.1 Precautions....................................................................................20
5.2 Start the pump...............................................................................20
5.2.1 Fill with water ..........................................................................21
5.3 Clean the pump..............................................................................21
6 Maintenance..................................................................................................................... 22
6.1 Torque values.................................................................................23
6.2 Service..........................................................................................23
6.3 Change the oil................................................................................24
6.4 Replace the impeller....................................................................... 25
6.4.1 Remove the impeller..................................................................25
6.4.2 Install the impeller.................................................................... 26
6.5 Replace the motor cable.................................................................. 28
6.5.1 Remove the motor cable............................................................ 28
6.5.2 Install the motor cable...............................................................29
Table of Contents
8125.230 Milli Installation, Operation, and Maintenance 1

7 Troubleshooting............................................................................................................... 32
7.1 The pump does not start..................................................................32
7.2 The pump does not stop when a level sensor is used........................... 33
7.3 The pump starts-stops-starts in rapid sequence.................................. 34
7.4 The pump runs but the motor protection trips.....................................34
7.5 The pump delivers too little or no water.............................................35
8 Technical Reference........................................................................................................ 37
8.1 Application limits............................................................................ 37
8.2 Motor data.....................................................................................37
8.3 Specific motor data.........................................................................37
8.4 Dimensions and weights.................................................................. 38
8.5 Performance curves........................................................................ 39
Table of Contents
2 8125.230 Milli Installation, Operation, and Maintenance

1 Introduction and Safety
1.1 Introduction
Purpose of the manual
The purpose of this manual is to provide 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 Grindex. If there is a question
regarding the intended use of the equipment, please contact a Grindex
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
1 Introduction and Safety
8125.230 Milli Installation, Operation, and Maintenance 3

Hazard level Indication
NOTICE:
Notices are used when there is a risk of
equipment damage or decreased
performance, but not personal injury.
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 Special hazards
Working in temporary installations
Certain industries, such as mining or construction, have a dynamic nature and
require temporary installation of equipment. Due to the rugged nature of these
applications, normal use of electrical equipment causes wear and tear that can
result in insulation breaks, short-circuits, and exposed wires. To maximize safety
when using the unit in rugged applications, the following conditions must be
met:
• If electrical cables must be located such that they are at risk of being run
over by heavy equipment, then provide mechanical protection to prevent
physical damage to the cables.
• Visually inspect electrical equipment before use. Remove from service any
equipment with exposed wires or visible damage.
• Use ground-fault circuit interrupters on all receptacles, or have an assured
equipment grounding conductor program.
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:
1 Introduction and Safety
4 8125.230 Milli Installation, Operation, and Maintenance

• 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.
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.
1.5 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 Grindex if it has been exposed to nuclear radiation,
unless Grindex has been informed and appropriate actions have been agreed
upon.
1.6 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.
1.7 Warranty
For information about warranty, see the sales contract.
1 Introduction and Safety
8125.230 Milli Installation, Operation, and Maintenance 5

2 Transportation and Storage
2.1 Inspect the delivery
2.1.1 Inspect the package
1. Inspect the package for damaged or missing items upon delivery.
2. Note any damaged or missing items on the receipt and freight bill.
3. File a claim with the shipping company if anything is out of order.
If the product has been picked up at a distributor, make a claim directly to the
distributor.
2.1.2 Inspect the unit
1. Remove packing materials from the product.
Dispose of all packing materials in accordance with local regulations.
2. Inspect the product to determine if any parts have been damaged or are
missing.
3. If applicable, unfasten the product by removing any screws, bolts, or straps.
For your personal safety, be careful when you handle nails and straps.
4. Contact a sales representative if there is any issue.
2.2 Transportation guidelines
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.
Equipment
locked out by
Name .......................
DANGER
Position and fastening
The unit can be transported either horizontally or vertically. Make sure that the
unit is securely fastened during transportation, and cannot roll or fall over.
2.2.1 Lifting
Always inspect the lifting equipment and tackle before starting any work.
WARNING: Crush Hazard
1) Always lift the unit by its designated lifting points. 2) Use suitable lifting
equipment and ensure that the product is properly harnessed. 3) Wear personal
protective equipment. 4) Stay clear of cables and suspended loads.
2 Transportation and Storage
6 8125.230 Milli Installation, Operation, and Maintenance

NOTICE:
Never lift the unit by its cables or hose.
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:
2 Transportation and Storage
8125.230 Milli Installation, Operation, and Maintenance 7

• 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
8 8125.230 Milli Installation, Operation, and Maintenance

3 Product Description
3.1 Products included
Pump model Standard EX MSHA Drainage Sludge
Milli 8125.230 X X
3.2 Pump design
The pump is submersible, and driven by an electric motor.
Intended use
The product is intended for moving waste water, sludge, raw and clean water.
Always follow the limits given in Application limits. If there is a question
regarding the intended use of the equipment, then contact a sales or authorized
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 EN/ATEX-, MSHA-
or FM-approved, then see the specific EX information in the Safety chapter
before taking any further actions.
NOTICE:
Do NOT use the unit in highly corrosive liquids.
For information about pH, see Application limits.
Particle size
The pump can handle liquid containing particles that correspond to the holes in
the strainer.
Number of holes Hole dimensions
61 5.2 mm (0.2 in)
Pressure class
N Medium head
Impeller type
Wear resistant
3.3 Monitoring equipment
The following applies to the monitoring equipment of the pump:
• The stator incorporates thermal contacts connected in series that activate the
alarm at overtemperature.
• The thermal contacts open at 135°C (275°F).
3 Product Description
8125.230 Milli Installation, Operation, and Maintenance 9

3.3.1 Level regulators
About level regulators
Starting and stopping the pump at different water levels can be manual or
automatic. If automatic start and stop is required, a level regulator can be
ordered (as an option). The option is only available for standard pumps.
Features
Below are some of the features of the level regulators:
• The level regulator can be set at different operating levels by adjusting the
length of cable.
• A clamping bracket situated at the lifting handle holds the level regulator
cable in place.
• If continuous pumping is required, the level regulator can be placed in a
special rubber bracket on the discharge connection to eliminate the level
regulator function.
Illustration
1
2
WS006210B
1. On
2. Off
Figure 1: The functionality of the level regulator
3.4 The data plate
Introduction
The data plate is a metal label located on the main body of the pump. The data
plate lists key product specifications.
3 Product Description
10 8125.230 Milli Installation, Operation, and Maintenance

The data plate
WS006202B
12
3
4
5
7 610 9 811
13
12
14
16
15
1. Pump model
2. Serial number
The first two characters describe the production year.
3. Phase; type of current; frequency
4. Product weight
5. Maximum capacity
6. Maximum submergence
7. Maximum head
8. Degree of protection
9. Read installation manual
10.Thermal class
11.International standard
12.Maximum power consumption
13.Rated current
14.Manufacturer
15.Country of origin
16.Rated voltage
3 Product Description
8125.230 Milli Installation, Operation, and Maintenance 11

4 Installation
4.1 Install the pump
Before starting work, make sure that the safety instructions in the chapter
Introduction and Safety on page 3 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.
Equipment
locked out by
Name .......................
DANGER
DANGER: Inhalation Hazard
Before entering the work area, make sure that the atmosphere contains
sufficient oxygen and no toxic gases.
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 EN/ATEX-, MSHA-
or FM-approved, then see the specific EX information in the Safety chapter
before taking any further actions.
WARNING: Explosion/Fire Hazard
Do not install CSA-approved products in locations that are classified as
hazardous in the National Electric Code(TM), ANSI/NFPA 70-2005.
Authority regulation
Vent the tank of a sewage station in accordance with local plumbing codes.
Sedimentation prevention
In order to avoid sedimentation when the pumped liquid contains solid particles,
the velocity of the liquid in the discharge line must exceed a certain value.
Choose applicable minimum velocity from the table, and choose proper
dimension of the discharge line accordingly.
Mixture Minimum velocity, meter per
second (feet per second)
Water + coarse gravel 4 (13)
Water + gravel 3.5 (11)
4 Installation
12 8125.230 Milli Installation, Operation, and Maintenance

Mixture Minimum velocity, meter per
second (feet per second)
Water + sand, particle size <0.6 mm
(0.024 in)
2.5 (8.2)
Water + sand, particle size <0.1 mm
(0.004 in)
1.5 (4.9)
For more permanent installations with a heavily contaminated pumped liquid, a
settling pump-sump is recommended.
WS001380B
Figure 2: Settling pump-sump
Discharge line requirements
The discharge line can be run vertically or horizontally, but must be without
sharp bends.
Proper horizontal and vertical installation Improper installation
with a sharp bend
WS001379A
WS001346A
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.
4.1.1 Install
The pump is transportable and intended to operate either completely or partially
submerged in the pumped liquid. The pump is equipped with a connection for
hose or pipe.
These requirements and instructions only apply when the installation is made
according to the dimensional drawing.
4 Installation
8125.230 Milli Installation, Operation, and Maintenance 13

1. Run the cable so that it has no sharp bends, is not pinched, and cannot be
sucked into the pump inlet.
2. Connect the discharge line.
The discharge line can be run vertically or horizontally, but must be without
sharp bends.
3. Lower the pump into the sump.
The cable must not be used for this purpose. You should attach a rope or
similar to the handle or the eye bolts for lowering and lifting the pump.
Heavier pumps must be lifted and lowered down by crane. Suspend the pump
by the lifting handle or the eye bolts with chains or wires.
4. Place the pump on the base and make sure it cannot fall over or sink.
The base should consist of a plank, a bed of coarse gravel, or a cut-down and
perforated oil drum.
Alternatively, the pump can be suspended with a lifting chain just above the
sump bottom. Make sure that the pump cannot rotate at start-up or during
operation.
5. Connect the motor cable and the starter and monitoring equipment according
to the separate instructions.
Make sure that the impeller rotation is correct. For more information, see
Check the impeller rotation on page 18.
4.2 Make the electrical connections
General precautions
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.
Equipment
locked out by
Name .......................
DANGER
WARNING: Electrical Hazard
Risk of electrical shock or burn. A certified electrician must supervise all
electrical work. Comply with all local codes and regulations.
WARNING: Electrical Hazard
There is a risk of electrical shock or explosion if the electrical connections are not
correctly carried out, or if there is fault or damage on the product. Visually
inspect equipment for damaged cables, cracked casings or other signs of
damage. Make sure that electrical connections have been correctly made.
WARNING: Crush Hazard
Risk of automatic restart.
4 Installation
14 8125.230 Milli Installation, Operation, and Maintenance

CAUTION: Electrical Hazard
Prevent cables from becoming sharply bent or damaged.
NOTICE:
Leakage into the electrical parts can cause damaged equipment or a blown fuse.
Keep the cable ends dry at all times.
Requirements
These general requirements apply for electrical installation:
• The supply authority must be notified before installing the pump if it will be
connected to the public mains. When the pump is connected to the public
power supply, it may cause flickering of incandescent lamps when started.
• The mains voltage and frequency must agree with the specifications on the
data plate. If the pump can be connected to different voltages, then the
connected voltage is specified by a yellow sticker close to the cable entry.
• The fuses and circuit breakers must have the proper rating, and the pump
overload protection (motor protection breaker) must be connected and set to
the rated current according to the data plate and if applicable the cable chart.
The starting current in direct-on-line start can be up to six times higher than
the rated current.
• The fuse rating and the cables must be in accordance with the local rules and
regulations.
• If intermittent operation is prescribed, then the pump must be provided with
monitoring equipment supporting such operation.
• The thermal contacts/thermistors must be in use.
Cables
These are the requirements to follow when you install cables:
• The cables must be in good condition, not have any sharp bends, and not be
pinched.
• The cables must not be damaged and must not have indentations or be
embossed (with markings, etc.) at the cable entry.
• The minimum bending radius must not be below the accepted value.
• If using a cable which has been used before, a short piece must be peeled off
when refitting it so that the cable entry seal sleeve does not close around the
cable at the same point again. If the outer sheath of the cable is damaged,
then replace the cable.
Contact a sales or authorized service representative.
• The voltage drop in long cables must be taken into account. The drive unit’s
rated voltage is the voltage measured at the cable connection point in the
pump.
• For SUBCAB® cables, the twisted pair copper foil must be trimmed.
• All unused conductors must be insulated.
Grounding (earthing)
Grounding (earthing) must be done in compliance with all local codes and
regulations.
DANGER: Electrical Hazard
All electrical equipment must be grounded (earthed). Test the ground (earth)
lead to verify that it is connected correctly and that the path to ground is
continuous.
4 Installation
8125.230 Milli Installation, Operation, and Maintenance 15

WARNING: Electrical Hazard
If the power cable is jerked loose, then the ground (earth) conductor must be
the last conductor to come loose from its terminal. Make sure that the ground
(earth) conductor is longer than the phase conductors at both ends of the cable.
WARNING: Electrical Hazard
Risk of electrical shock or burn. You must connect an additional ground- (earth-)
fault protection device to the grounded (earthed) connectors if persons are likely
to come into contact with liquids that are also in contact with the pump or
pumped liquid.
Ground (earth) conductor length
The ground (earth) conductor must be 180 mm (7.1 in) longer than the phase
conductors in the junction box of the unit.
Check the ground (earth) continuity
NOTICE:
The two earth (ground) conductors in the pump are connected via the same
conductor to ground (earth)
Check the ground (earth) continuity.
Measure between the ground (earth) conductor in the motor cable and one of
the screws securing the strainer.
WS001396B
4.2.1 Connect the motor cable to the pump
NOTICE:
Leakage into the electrical parts can cause damaged equipment or a blown fuse.
Keep the end of the motor cable dry at all times.
1. Check the data plate to see which connections are required for the power
supply.
2. Connect the motor cable conductors, including ground (earth) , to the
terminal or starter unit.
3. Make sure that the pump is correctly connected to ground (earth) .
4. Firmly tighten the cable entry into its bottom-most position.
The seal sleeve and the washers must conform to the outside diameter of the
cables.
4 Installation
16 8125.230 Milli Installation, Operation, and Maintenance

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 EN/ATEX-, MSHA-
or FM-approved, then see the specific EX information in the Safety chapter
before taking any further actions.
4.2.2 Cable charts
Connection locations
WS001021B
L1 L2 L3 T3 T4T1 T2
15
13
14
42 31
7
10
5
9
8
6
11
12
17
16
24
22
23
19 20
21
18
1 Starter equipment and main
leads (L1, L2, L3)
13 Coil
2 Ground (earth) 14 Transformer
3 Functional ground 15 Capacitor
4 Control leads (T1, T2, T3, T4) 16 Softstarter
5 Phase shifter 17 Level regulator
6 Diode 18 Contactor, start relay or thermal
relay
7 Motor cable 19 Thermal detector in stator
8 Screen 20 Thermal detector in main bearing
9 Pump 21 Jumper
10 Crimp connection 22 Terminal board, terminal plate
11 Crimp isolation 23 Leakage sensor
12 Motor protector 24 Stator leads (U1, U2, U5, U6, V1,
V2, V5, V6, W1, W2, W5, W6,
Z1, Z5, Z6)
4 Installation
8125.230 Milli Installation, Operation, and Maintenance 17

Color code standard
Code Description
BN Brown
BK Black
WH White
OG Orange
GN Green
GNYE Green-Yellow
RD Red
GY Grey
BU Blue
YE Yellow
Motor cable and starter unit connection to the terminal board
1 - P H A S E (1~)
788 24 01
8121
8122
8123
Connection plate
BN
BU
GNYE
Motor cable
Pump
Capacitor
WH
WH
Stator
WH
BN
BK
With capacitor
COLOUR STANDARD
AND SYMBOLS
BN=Brown
BK=Black
BU=Blue
WH=White
GNYE=Green-Yellow
1 - P H A S E (1~)
BN
BU
GNYE
Motor cable
Pump start
Capacitor
Motorswitch
run
Capacitor
WH
Relay 2
3
4
788 24 01
8121
8122
8123
Connection plate
WH
BN
BK
With start
and run capacitor
M
M
M
Ground
Motorswitch
3
1
Terminal device
230V/50Hz
115V-240V/50Hz
115V-230V/60Hz
Float switch
Optional GC
GNYE
GC Ground check
BN/BK
BU/WH
Float switch
Optional GC
GNYE BN/BK
BU/WH
WH
WH
3
1
WH
WH
Connector
Inside pump
Stator
COLOUR STANDARD
AND SYMBOLS
BN=Brown
BK=Black
BU=Blue
WH=White
GNYE=Green-Yellow
M
Ground
Terminal device
GC Ground check
Connector
Inside pump
BU
BU
WS007752
8125
8125
4.3 Check the impeller rotation
CAUTION: Crush Hazard
The starting jerk can be powerful. Make sure nobody is close to the unit when it
is started.
Check the direction of rotation each time the cable has been re-connected and
after phase or total supply failure.
1. Start the motor.
2. Stop the motor.
3. Check that the impeller rotates in the correct direction.
The correct direction of impeller rotation is clockwise when you look at the
pump from above. When started, the pump will react in the opposite direction
to the impeller rotation.
4 Installation
18 8125.230 Milli Installation, Operation, and Maintenance