Installation,
Operation, and
Maintenance Manual
MK, MV (8201, 8201X)
Table of Contents
Introduction and Safety.........................................................................................................................3
Introduction..........................................................................................................................................3
Safety.....................................................................................................................................................3
Safety terminology and symbols....................................................................................................3
Environmental safety........................................................................................................................4
User safety.........................................................................................................................................5
Ex-approved products.....................................................................................................................6
Product warranty...............................................................................................................................7
Transportation and Storage..................................................................................................................8
Inspect the delivery.............................................................................................................................8
Inspect the package.........................................................................................................................8
Inspect the unit..................................................................................................................................8
Transportation guidelines..................................................................................................................8
Precautions........................................................................................................................................8
Position and fastening......................................................................................................................8
Lifting..................................................................................................................................................8
Temperature ranges for transportation, handling and storage....................................................9
Handling at freezing temperature..................................................................................................9
Unit in as-delivered condition.........................................................................................................9
Lifting the unit out of liquid...........................................................................................................10
Storage guidelines............................................................................................................................10
Storage location.............................................................................................................................10
Long-term storage..........................................................................................................................10
Table of Contents
Product Description.............................................................................................................................11
Pump design......................................................................................................................................11
Parts....................................................................................................................................................12
Monitoring Equipment.....................................................................................................................12
Optional sensors.............................................................................................................................13
The data plate....................................................................................................................................13
Approvals...........................................................................................................................................14
Installation.............................................................................................................................................15
Install the pump.................................................................................................................................15
Authority regulation.......................................................................................................................15
Fasteners.........................................................................................................................................15
Install with stand.............................................................................................................................15
Make the electrical connections......................................................................................................16
General precautions.......................................................................................................................16
Requirements..................................................................................................................................17
Cables..............................................................................................................................................17
Earthing (Grounding).....................................................................................................................18
Connect the motor cable to the pump........................................................................................18
Connect the motor cable to the starter and monitoring equipment.......................................18
Cable charts....................................................................................................................................19
Check the impeller rotation.............................................................................................................27
Operation..............................................................................................................................................28
Precautions.........................................................................................................................................28
Distance to wet areas........................................................................................................................28
Noise level..........................................................................................................................................28
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 1
Table of Contents
Start the pump...................................................................................................................................28
Maintenance.........................................................................................................................................30
Precautions.........................................................................................................................................30
Maintenance guidelines...................................................................................................................30
Torque values....................................................................................................................................30
Change the oil...................................................................................................................................31
Empty the oil...................................................................................................................................31
Fill with oil........................................................................................................................................32
Service the pump..............................................................................................................................32
Inspection........................................................................................................................................33
Major overhaul................................................................................................................................34
Service in case of alarm.................................................................................................................34
Replace the impeller.........................................................................................................................34
Remove the impeller......................................................................................................................35
Install the impeller..........................................................................................................................35
Troubleshooting...................................................................................................................................36
Introduction.......................................................................................................................................36
The pump does not start..................................................................................................................36
The pump does not stop when a level sensor is used.................................................................37
The pump starts-stops-starts in rapid sequence...........................................................................37
The pump runs but the motor protection trips.............................................................................38
The pump delivers too little or no water........................................................................................38
Technical Reference............................................................................................................................40
Motor data..........................................................................................................................................40
Application limits...............................................................................................................................40
2 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Introduction and Safety
Introduction
Purpose of this manual
The purpose of this manual is to provide necessary information for:
• Installation
• Operation
• Maintenance
CAUTION:
Read this manual carefully before installing and using the product. Improper use of the
product can cause personal injury and damage to property, and may void the warranty.
NOTICE:
Save this manual for future reference, and keep it readily available at the location of the
unit.
Introduction and Safety
Safety
WARNING:
• The operator must be aware of safety precautions to prevent physical injury.
• Any pressure-containing device can explode, rupture, or discharge its contents if it is
over-pressurized. Take all necessary measures to avoid over-pressurization.
• 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. 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.
• Do not change the service application without the approval of an authorized Xylem
representative.
CAUTION:
You must observe the instructions contained in this manual. Failure to do so could result in
physical injury, damage, or delays.
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
• Product malfunction
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 3
Introduction and Safety
Hazard levels
Hazard level Indication
Hazard categories
DANGER:
WARNING:
CAUTION:
NOTICE:
Hazard categories can either fall under hazard levels or let specific symbols replace the
ordinary hazard level symbols.
Electrical hazards are indicated by the following specific symbol:
A hazardous situation which, if not avoided, will result in
death or serious injury
A hazardous situation which, if not avoided, could result
in death or serious injury
A hazardous situation which, if not avoided, could result
in minor or moderate injury
• A potential situation which, if not avoided, could
result in undesirable conditions
• A practice not related to personal injury
Electrical Hazard:
These are examples of other categories that can occur. They fall under the ordinary hazard
levels and may use complementing symbols:
• Crush hazard
• Cutting hazard
• Arc flash hazard
Environmental safety
The work area
Always keep the station clean to avoid and/or discover emissions.
Waste and emissions regulations
Observe these safety regulations regarding waste and emissions:
• Appropriately dispose of all waste.
• Handle and dispose of the processed liquid in compliance with applicable
environmental regulations.
• Clean up all spills in accordance with safety and environmental procedures.
• Report all environmental emissions to the appropriate authorities.
4 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Electrical installation
Recycling guidelines
User safety
General safety rules
Safety equipment
Introduction and Safety
WARNING:
Do NOT send the product to the Xylem manufacturer if it has been contaminated by any
nuclear radiation. Inform Xylem so that accurate actions can take place.
For electrical installation recycling requirements, consult your local electric utility.
Always follow local laws and regulations regarding recycling.
These safety rules apply:
• Always keep the work area clean.
• Pay attention to the risks presented by gas and vapors in the work area.
• Avoid all electrical dangers. Pay attention to the risks of electric shock or arc flash
hazards.
• Always bear in mind the risk of drowning, electrical accidents, and burn injuries.
Use safety equipment according to the company regulations. Use this safety equipment
within the work area:
• Hard hat
• Safety goggles, preferably with side shields
• Protective shoes
• Protective gloves
• Gas mask
• Hearing protection
• First-aid kit
• Safety devices
NOTICE:
Never operate a unit unless safety devices are installed. Also see specific information
about safety devices in other chapters of this manual.
Electrical connections
Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local regulations. For more information about
requirements, see sections dealing specifically with electrical connections.
Hazardous liquids
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 work with biologically hazardous liquids are
vaccinated against diseases to which they may be exposed.
• Observe strict personal cleanliness.
Wash the skin and eyes
Follow these procedures for chemicals or hazardous fluids that have come into contact
with your eyes or your skin:
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 5
Introduction and Safety
Condition Action
Chemicals or hazardous
fluids in eyes
Chemicals or hazardous
fluids on skin
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.
1. Remove contaminated clothing.
2. Wash the skin with soap and water for at least 1 minute.
3. Seek medical attention, if necessary.
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 Ex-approved product must never run dry during normal 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.
• Make sure that thermal contacts are connected to a protection circuit according to the
approval classification of the product, and that they are in use.
• 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 parts that are provided by an Ex-approved Xylem representative.
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).
6 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Minimum permitted liquid level
See the dimensional drawings of the product for the minimum permitted liquid level
according to the approval for explosion proof products. If the information is missing on the
dimensional drawing, the product must be fully submerged. Level-sensing equipment
must be installed if the product can be operated at less than the minimum submersion
depth.
Monitoring equipment
For additional safety, use condition-monitoring devices. Condition-monitoring devices
include but are not limited to the following:
• Level indicators
• Temperature detectors
Product warranty
Coverage
Xylem undertakes to remedy defects in products from Xylem under these conditions:
• The faults are due to defects in design, materials, or workmanship.
• The faults are reported to an local sales and service representative within the warranty
period.
• The product is used only under the conditions described in this manual.
• The monitoring equipment incorporated in the product is correctly connected and in
use.
• All service and repair work is done by Xylem authorized personnel.
• Genuine Xylem parts are used.
• Only Ex-approved spare parts and accessories authorized by an EX-approved Xylem
representative are used in Ex-approved products.
Introduction and Safety
Limitations
Warranty claim
Spare parts
The warranty does not cover defects caused by these situations:
• Deficient maintenance
• Improper installation
• Modifications or changes to the product and installation made without consulting an
Xylem authorized representative
• Incorrectly executed repair work
• Normal wear and tear
Xylem assumes no liability for these situations:
• Bodily injuries
• Material damages
• Economic losses
Xylem products are high-quality products with expected reliable operation and long life.
However, should the need arise for a warranty claim, then contact your local sales and
service representative.
Xylem guarantees that spare parts will be available for 15 years after the manufacture of
this product has been discontinued.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 7
Transportation and Storage
Transportation and Storage
Inspect the delivery
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.
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 your sales representative if anything is out of order.
Transportation guidelines
Precautions
WARNING:
• Stay clear of suspended loads.
• Observe accident prevention regulations in force.
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.
Lifting
WARNING:
• Crush hazard. The unit and the components can be heavy. Use proper lifting methods
and wear steel-toed shoes at all times.
• Lift and handle the product carefully, using suitable lifting equipment.
• The product must be securely harnessed for lifting and handling. Use eyebolts or lifting
lugs if available.
• Always lift the unit by its lifting handle. Never lift the unit by the motor cable or by the
hose.
• Do not attach sling ropes to shaft ends.
8 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Lifting eyebolts
Lifting equipment
Transportation and Storage
When lifting eyebolts are used for lifting the unit, the following guidelines apply:
• they always have to be screwed in firmly against the base
• they must be level with each other
• the angle between them must not be greater then 90°
Lifting equipment is always required when handling the unit. It must fulfill the following
requirements:
• The minimum height (contact your local sales and service representative for
information) between the lifting hook and the floor must be sufficient to lift the unit.
• 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 securely anchored and in good condition.
• The lifting equipment must support weight of the entire assembly and must only be
used by authorized personnel.
• 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.
NOTICE:
Oversized lifting equipment could cause damage if the unit should stick when being
lifted.
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).
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 9
Transportation and Storage
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.
Units equipped with an internal 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.
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 water. Change if needed.
Storage guidelines
Storage location
The product must be stored in a covered and dry location free from heat, dirt, and
vibrations.
Long-term storage
NOTICE:
• Protect the product against humidity, heat sources, and mechanical damage.
• Do not place heavy weights on the packed product.
If the unit is stored more than 6 months, 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.
10 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Product Description
Pump design
The pump is submersible, and driven by an electric motor.
Intended use
The product is intended for moving wastewater, sludge, raw and clean water. Always
follow the limits that are given in Application limits (page 40). If there is a question
regarding the intended use of the equipment, please contact a local sales and service
representative before proceeding.
WARNING:
In explosive or flammable environments, only use Ex- or MSHA-approved pumps.
NOTICE:
Do NOT use the pump in highly corrosive liquids.
The pump is not suitable to pump abrasive solids.
Product Description
Spare parts
• Modifications to the unit or installation should only be carried out after consulting with
Xylem.
• Original spare parts and accessories that are authorized by Xylem are essential for
compliance. The use of other parts can invalidate any claims for warranty or
compensation. For more information contact your Xylem representative.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 11
WS000111A
1
4
2
3
7
8
9
6
5
Product Description
Parts
PositionPart Description
1 Shaft Stainless steel with an integrated rotor
2 Stator housing Cooled by ambient liquid
3 Motor For information about the motor, see Motor data (page 40).
4 Mechanical seal
5 Oil housing Includes coolant that lubricates and cools the seals; acts as a buffer between the
6 Impeller
7
8
9
Monitoring Equipment
The following applies to the monitoring equipment of the pump:
• The stator incorporates thermal contacts connected in series that activates the alarm at
overtemperature.
• The thermal contact open at 125°C (257°F).
• Ex-approved pumps must have thermal contacts connected to the control panel.
Type: Mechanical face seal
pumped fluid and the electric motor
Main bearing
Thermal contact If the pump is equipped with a thermal contact, see Monitoring Equipment (page 12) .
Support bearing
C-impeller
D-impeller
Single-row ball bearing
Single-row ball bearing
12 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Optional sensors
2
1312 14
22
21
20
17 18 1916159 10 11
8
7
6
5
4
3
1
WS000351A
LD LD is a miniature float switch for detection of liquid in the stator housing. Due to its
The data plate
The data plate
The data plate is a metal label located on the main body of the pump. The data plate lists
key product specifications.
Ex- and MSHA-approved products also have approval plates. They are described below, if
applicable.
Product Description
• The sensors must be connected to either the SMR 311 monitoring equipment or an
equivalent equipment.
• The monitoring equipment must be of a design that makes automatic restart
impossible.
• Information in the junction box shows if the pump is equipped with optional sensors
design it is best suited for pumps in a vertical position. The LD sensor is installed in the
bottom of the stator housing.
1. Curve code/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
The name plate
The name plate is a metal label located on the main body of the pump. This plate lists key
product specifications for the branded pump.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 13
1
2 3 4 5 6
9
8
7
WS000091B
WS000726B
1
2
Product Description
1. Model
2. Horse power
3. R.P.M.
4. Phase Volts
5. KVA code
6. Additional information
7. Insulation class
8. Max. amperes
9. Impeller diameter
Approvals
FM
This section describes the special approvals that explosion-proof products have. For more
information, please contact your sales representative.
This illustration describes the approval plate for Factory Mutual (FM) and the information
contained in its fields.
1. Temperature class
2. Maximum ambient temperature
Figure 1: FM approval plate
14 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Installation
Install the pump
DANGER:
Disconnect and lock out electrical power before installing or servicing the unit.
WARNING:
• Note that special rules apply to installation in explosive atmospheres.
• Make sure that the unit cannot roll or fall over and injure people or damage property.
• Do not install CSA-approved products in locations that are classified as hazardous in the
national electric code, ANSI/NFPA 70-2005.
• Do not install the starter equipment in an explosive zone unless it is explosion-proof
rated.
WARNING:
Electrical shock hazard. Check that the cable and cable entry have not been damaged
during transport before installing the pump.
Installation
Authority regulation
Fasteners
NOTICE:
• Do not run the pump dry.
• Never force piping to make a connection with a pump.
• Always remove all debris and waste material from the sump, inlet piping, and
discharge connection, before you install the pump.
These requirements apply:
• Use the pump dimensional drawing in order to ensure proper installation.
• Provide a suitable barrier around the work area, for example, a guard rail.
• Check the explosion risk before you weld or use electric hand tools.
• Always check the impeller rotation before lowering the pump into the pumped liquid.
Vent the tank of a sewage machine station in accordance with local plumbing codes.
WARNING:
• Only use fasteners of the proper size and material.
• Replace all corroded fasteners.
• Make sure that all fasteners are properly tightened and that there are no missing
fasteners.
Install with stand
In the S-installation, 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 and stands on a base stand.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 15
WS000114A
Installation
The stand is integrated with the pump housing and the hose is connected to pump using
thread coupling.
These requirements and instructions only apply when the installation is made according to
the dimensional drawing. For information about the different installation types, see Parts
List.
Figure 2: Installation with stand
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.
3. Lower the pump into the sump.
4. Place the pump on the base and make sure it cannot fall over or sink.
Alternatively, the pump can be suspended with a lifting chain just above the sump
bottom. Make sure that the pump cannot rotate at startup 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 (page 27).
Make the electrical connections
General precautions
Electrical Hazard:
• A certified electrician must supervise all electrical work. Comply with all local codes and
regulations.
• 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.
• Leakage into the electrical parts can cause damaged equipment or a blown fuse. Keep
the end of the motor cable above the liquid level.
• Make sure that all unused conductors are insulated.
• 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.
16 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Requirements
Installation
WARNING:
Do not install the starter equipment in an explosive zone unless it is explosion-proof rated.
CAUTION:
If the pump is equipped with automatic level control and/or internal contactor, there is a
risk of sudden restart.
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.
• If stated on the data plate, then the motor is convertible between different voltages.
• The thermal contacts/thermistors must be in use.
• For FM-approved pumps, a leakage sensor must be connected and in use in order to
meet approval requirements.
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 sheathing must not be damaged and must not have indentations or be embossed
(with markings, etc.) at the cable entry.
• The cable entry seal sleeve and washers must conform to the outside diameter of the
cable.
• 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 local sales and 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.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 17
Installation
Earthing (Grounding)
Electrical Hazard:
• You must earth (ground) all electrical equipment. This applies to the pump equipment,
the driver, and any monitoring equipment. Test the earth (ground) lead to verify that it is
connected correctly.
• If the motor cable is jerked loose by mistake, the earth (ground) conductor should be the
last conductor to come loose from its terminal. Make sure that the earth (ground)
conductor is longer than the phase conductors. This applies to both ends of the motor
cable.
• Risk of electrical shock or burn. You must connect an additional earth- (ground-) fault
protection device to the earthed (grounded) connectors if persons are likely to come
into physical contact with the pump or pumped liquids.
Connect the motor cable to the pump
CAUTION:
Leakage into the electrical parts can cause damaged equipment or a blown fuse. Keep the
end of the motor cable above the liquid level.
For more information about the cable entry, see the Parts list.
1. Remove the entry gland screw from the stator housing.
This provides access to the closed end splice.
2. Check the data plate to see which connections are required for the power supply.
3. Arrange the connections on the closed end splices in accordance with the required
power supply. in accordance with the required power supply.
4. Connect the mains leads (L1, L2, L3, and earth (ground)) according to applicable cable
chart.
The earth (ground) conductor must be 50 mm ( 2.0 in.) longer than the phase
conductors in the junction box of the unit.
5. Make sure that the pump is correctly connected to earth (ground).
6. Make sure that any thermal contacts incorporated in the pump are properly connected
to the closed end splices.
7. Install the entry gland screw on the stator housing.
Connect the motor cable to the starter and monitoring equipment
WARNING:
Do not install the starter equipment in an explosive zone unless it is explosion-proof rated.
NOTICE:
• Thermal contacts are incorporated in the pump.
• Thermal contacts must never be exposed to voltages higher than 250 V, breaking
current maximum 4 A. It is recommended that they are connected to 24 V over
separate fuses to protect other automatic equipment.
18 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Cable charts
WS000509C
L2
L3L1
L1
L3L2
T1
T2
Description
Installation
The single phase pumps must be equipped with a starter which has start and run
capacitors.
1. If thermal contacts are included in the pump installation, connect the T1 and T2 control
conductors to the monitoring equipment.
NOTICE:
Ex-approved products must always have the thermal contacts connected irrespective
of the ambient temperature.
2. Connect the mains leads (L1, L2, L3, and earth [ground]) to the starter equipment.
For information about the phase sequence and the color codes of the leads, see Cable
charts (page 19).
3. Check the functionality of the monitoring equipment:
a) Check that the signals and the tripping function work properly.
b) Check that the relays, lamps, fuses, and connections are intact.
Replace any defective equipment.
This topic contains general connection information. It also provides cable charts that show
connection alternatives for use with different cables and power supply.
Figure 3: Phase sequence
Connection locations
The figures in this section illustrate how to interpret the connection strip symbols.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 19
1
2
3
4
L1 L2 L3
T3 T4T1 T2
U1
V1
W1
U2
W2
V2
U1
V1
W1
W2
U2
V2
U1
V1
W1
GC
W2
U2
V2
L1
L2
L3
*YE
GN/YE
WH
L1
U1
U2
W2
V2
W1
V1
L3
L2
WS004133D
L1 L2 L3
T3 T4T1 T2
4321
5
8
6
LD
9
7
WS004846B
Installation
1. Stator leads
2. Terminal board
3. Motor cable leads
4. Stator (internal connection illustrated)
1. Starter equipment and mains leads (L1, L2, L3)
2. Earth (ground)
3. Functional ground
4. Control leads (T1, T2, T3, T4)
5. Thermal contact
6. Leakage detector (LD)
7. Thermistor
8. Level sensor
9. Capacitor
Color code standard
Code Description
BN Brown
BK Black
WH White
OG Orange
GN Green
20 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
GNYE Green-Yellow
RD Red
GY Grey
BU Blue
YE Yellow
Colors and marking of leads
772 17 05/2
Motor connection
Colors and marking of main leads
COLOR STANDARD
STATOR LEADS
BN = Brown
U1,U5 = RD
BK = Black
U2,U6 = GN
WH = White
V1,V5 = BN
OG = Orange
V2,V6 = BU
GN = Green
W1,W5 = YE
GN/YE = Green-Yellow
W2,W6 = BK
RD = Red
T1,T2 = WH/YE
GY = Grey
BU = Blue
YE = Yellow
*SUBCAB AWG
* * Ground Conductor is stranded around cores
GC=Ground Check
Mains
1
3
SUBCAB 7GX
H07RN-F
SUBCAB 4GX
SUBCAB AWG
1
L1
BK 1
BK 1
BN
RD
2
L2
BK 2
BK 2
BK
BK
3
L3
BK 3
BK 3
GY
WH
L1
BK 4
BK 4
-
-
L2
BK 5
BK 5
-
-
L3
BK 6
BK 6
-
-
GN/YE
GN/YE
GN/YE
GN/YE
GC
-
-
-
YE
WS004600B
Figure 4: Motor connection
Installation
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 21
3 PHASE 6 Leads
Y
L1
U1
U2
W2
V2
W1
V1
L3
L2
U1
V1
W1
U2
W2
V2
U1
V1
W1
W2
U2
V2
U1
V1
W1
GC
W2
U2
V2
L1
L2
L3
*YE
GN/YE
D
L1
W2
U1
W1
U2
L3
V2
V1
L2
U1
V1
W1
W2
U2
V2
U1
V1
W1
W2
U2
V2
U1
V1
W1
W2
U2
V2
GC
L1
L2
L3
*YE
GN/YE
Y/D
L1:1
L2:1
L3:1
L1:2
L2:2
L3:2
U1
V1
W1
U2
V2
W2
U1
V1
W1
W2
U2
V2
U1
V1
W1
W2
U2
V2
U1
V1
W1
W2
U2
V2
GC
1
2
3
4
L2
L3
L1
L2
L1
5
6
L3
GN/YE
*YE
WS004601B
Installation
3-phase connection
Figure 5: 6 leads
22 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Y-
3 PHASE 9 Leads
L3
W1
U1
L1
W2
U2
W5
U5
V2
V1
V5
L2
U1
V1
W1
V2
U5
V5
W5
U2
W2
U1
V1
W1
U1
V1
W1
GC
L1
L2
L3
*YE
GN/YE
Y-SER
L1
U1
U2
U5
W2
W5
W1
V5
V2
V1
L3
L2
U5
U2
V5
V2
W5
W2
U1
V1
W1
U1
U5
V1
V5
W1
W5
GC
L1
L2
L3
*YE
GN/YE
WS004602B
Installation
Figure 6: 9 leads
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 23
Y-
3 PHASE 12 Leads
L1
U1
U5
U2
W2
U6
W1
V6
W6
V2
V5
W5
L3
V1
L2
U1
V1
W1
U2
V6
U5
V5
W5
V2
W2
U6
W6
U1
V1
W1
W2
U2
V2
U1
V1
W1
W2
GC
U2
V2
L1
L2
L3
*YE
GN/YE
Y-SER
L1
U1
U2
U5
W6
U6
W2
W5
V6
W1
V5
V2
V1
L3
L2
U1
V1
W1
W2
U2
V2
V6
W5
U5
V5
U6
W6
U1
V1
W1
W2
U2
V2
U1
V1
W1
W2
U2
V2
GC
L1
L2
L3
*YE
GN/YE
D-SER
D-
L1
W2 BK
U1 RD
W6 BK
U1
W2
W5 YEL2U2 GN
V1 BN
U6 GN
V1
U2
U5 RDL3V2 BU
W1 YE
V6 BU
W1
V2
V5 BN
GN/YE
*YE
GC
460V
L1
W2 BK
U1 RD
U5 RD
U1
W2
W6 BK
L2
U2 GN
V1 BN
V5 BN
V1
U2
U6 GN
L3
V2 BU
W1 YE
W5 YE
W1
V2
V6 BU
GN/YE
*YE
GC
230V
WS004603C
Installation
Figure 7: 12 leads
24 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
1-phase connection
1 PHASE 4 Leads
1 ~
Z2
U2
U1
Z1
T1
T2
BK
BN
RD
YE
GC
1/BN
*RD
2/BK
*BK
3/GY
*WH
4/T1
*OG
5/T2
*BU
6
WH
GN/YE
*YE
Starter
1 PHASE 12 Leads
1 ~
U1
V1
W1
U2
V2
W2
U5
V5
W5
U6
V6
W6
U1
V1
U6
U2
W2
V6
V5
W1
W5
U5
V2
W6
U1
V1
W1
W2
U2
V2
GC
U1
V1
W1
W2
U2
V2
BN
*RD
BK
GY
1
3
*BK
*WH
*YE
2
6
GN/YE
Starter
1 ~
WS004604B
Installation
Figure 8: 4 leads, 12 leads
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 25
SENSORS
*IF Y/D-start, sensors not connected
Control
SUBCAB 4GX/7G
SUBCAB AWG
H07RN-F*
T1
WH T1
OG
BK 4
T2
WH T2
BU
BK 5
(Thermal Contacts)
TC
Max. 250V Max.5A
Max. 1.6A,cos =0.6
Max. 2.5A,cos =1
6
WH/YE
T1
Control leads
WH/YE
T2
T1/*OG/4
*SUBCAB AWG
T2/*OG/5
+ LD
LD
TC
Max 12 V
BU
BU
WH
YE
6
BU
WH/YE
T1
Control leads
+7
BU
T2
T1/*OG/4
SMR 311
-5
*SUBCAB AWG
T2/*BU/5
WS004605B
Installation
Sensors connection
Sensor connection characteristics
26 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
The values have a 10 % tolerance.
Sensors Value (mA) Definition
LD and thermal contact 0 Overtemperature
7.8 OK
36 Leakage
Check the impeller rotation
WS006253A
WARNING:
The starting jerk can be powerful.
1. Start the motor.
2. Stop the motor after a few seconds.
3. Check that the impeller rotates according to this illustration.
Installation
The correct direction of impeller rotation is clockwise when you look at the pump from
above.
4. If the impeller rotates in the wrong direction, do one of these steps:
• If the motor has a 1-phase connection, contact the local sales and service
representative.
• If the motor has a 3-phase connection, transpose two phase leads and do this
procedure again.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 27
Operation
Operation
Precautions
WARNING:
• Never operate the pump without safety devices installed.
• Never operate the pump with the discharge valve closed.
• Make sure you have a clear path of retreat.
• Never work alone.
CAUTION:
If the pump is equipped with automatic level control and/or internal contactor, there is a
risk of sudden restart.
Distance to wet areas
Electrical Hazard:
Risk of electrical shock. Make sure no one gets closer than 20 m (65 ft.) to the unit when
being in contact with the pumped or mixed liquid.
Electrical Hazard:
Risk of electrical shock. This unit has not been investigated for use in swimming pools. If
used in connection with swimming pools special safety regulations apply.
Noise level
NOTICE:
The noise level of the product is lower than 70 dB. However, the noise level of 70 dB may
be exceeded in some installations and at certain operating points on the performance
curve. Make sure that you understand the noise level requirements in the environment
where the pump is installed. Failure to do so may result in hearing loss or violation of local
laws.
Start the pump
DANGER:
If you need to work on the pump, make sure that it is isolated from the power supply and
cannot be energized.
28 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Operation
WARNING:
• Make sure that the unit cannot roll or fall over and injure people or damage property.
• In some installations, the pump and the surrounding liquid may be hot. Bear in mind the
risk of burn injuries.
• Make sure nobody is close to the unit when it is started. The unit will jerk in the opposite
direction of the impeller rotation.
• During operation the Ex-approved product must be fully submerged.
NOTICE:
Make sure that the rotation of the impeller is correct. For more information, see Check the
impeller rotation.
1. Check the oil level in the oil housing.
2. Remove the fuses or open the circuit breaker, and check that the impeller can be
rotated freely.
3. Conduct insulation test phase to ground. To pass, the value must exceed 5 megohms.
4. Check that the monitoring equipment (if any) works.
5. Start the pump.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 29
Maintenance
Maintenance
Precautions
DANGER:
Disconnect and lock out electrical power before installing or servicing the unit.
WARNING:
• Always follow safety guidelines when working on the product. See Introduction and
Safety (page 3).
• Make sure that the unit cannot roll or fall over and injure people or damage property.
• Rinse the unit thoroughly with clean water before working on the unit.
• Rinse the components in water after dismantling.
Make sure that you follow these requirements:
• Check the explosion risk before you weld or use electrical hand tools.
• Allow all system and pump components to cool before you handle them.
• Make sure that the product and its components have been thoroughly cleaned.
• Do not open any vent or drain valves or remove any plugs while the system is
pressurized. Make sure that the pump is isolated from the system and that pressure is
relieved before you disassemble the pump, remove plugs, or disconnect piping.
Maintenance guidelines
During maintenance and before reassembly, always remember to perform these tasks:
• Clean all parts thoroughly, particularly O-ring grooves.
• Change all O-rings, gaskets, and seal washers.
• Lubricate all springs, screws, and O-rings with grease.
During reassembly, always make sure that existing index markings are in line.
The reassembled drive unit must always be insulation-tested and the reassembled pump
must always be test-run before normal operation.
Torque values
All screws and nuts must be lubricated to achieve correct tightening torque. Screws that
are screwed into stainless steel must have the threads coated with suitable lubricants to
prevent seizing.
If there is a question regarding the tightening torques, please contact the local sales and
service representative.
Screws and nuts
Table 1: Stainless steel, A2 and A4, torque Nm (ft-lbs)
Property
class
50 1.0 (0.74) 2.0 (1.5) 3.0 (2.2) 8.0 (5.9) 15 (11) 27 (20) 65 (48) 127 (93.7) 220 (162) 434 (320)
70, 80 2.7 (2) 5.4 (4) 9.0 (6.6) 22 (16) 44 (32) 76 (56) 187 (138) 364 (268) 629 (464) 1240
M4 M5 M6 M8 M10 M12 M16 M20 M24 M30
(915)
30 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
WS002004A
Maintenance
Property
M4 M5 M6 M8 M10 M12 M16 M20 M24 M30
class
100 4.1 (3) 8.1 (6) 14 (10) 34 (25) 66 (49) 115 (84.8) 248 (183) 481 (355) — —
Table 2: Steel, torque Nm (ft-lbs)
Property
M4 M5 M6 M8 M10 M12 M16 M20 M24 M30
class
8.8 2.9 (2.1) 5.7 (4.2) 9.8 (7.2) 24 (18) 47 (35) 81(60) 194 (143) 385 (285) 665 (490) 1310
(966.2)
10.9 4.0 (2.9) 8.1 (6) 14 (10) 33 (24) 65 (48) 114 (84) 277 (204) 541 (399) 935 (689) 1840
(1357)
12.9 4.9 (3.6) 9.7 (7.2) 17 (13) 40 (30) 79 (58) 136 (100) 333 (245) 649 (480) 1120
(825.1)
2210
(1630)
Hexagon screws with countersunk heads
For hexagon socket head screws with countersunk head, maximum torque for all property
classes must be 80% of the values for property class 8.8 above.
Change the oil
This image shows the plugs that are used to change the oil.
Empty the oil
WARNING:
The oil housing may be pressurized. Hold a rag over the oil plug to prevent oil from
spraying out.
1. Place the pump in a horizontal position and unscrew the oil plug.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 31
WS001760A
WS001762A
Maintenance
Fill with oil
2. Place a container under the pump and turn the pump.
The oil should be a medical white oil of paraffin type that fulfills FDA 172.878 (a) and
viscosity close to VG32.
1. Replace the O-ring of the oil plug.
2. Fill with oil.
Quantity: approximately 0.6 L (0.63 qt.)
3. Refit the oil plug and tighten.
Tightening torque: 10-40 Nm (7.5-29.5 ft-lbs)
Service the pump
Type of service Purpose Inspection interval
Initial inspection To make a check up of the pump
condition by a Xylem authorized
service representative and, based
on the result and findings from
these measures, to determine the
intervals for periodical inspection
and major overhaul for the specific
installation.
Periodical inspection To prevent operational interruptions
and machine breakdown. Measures
32 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Within the first year of operation.
Up to every year. Applies to normal
applications and operating
Type of service Purpose Inspection interval
Maintenance
Inspection
to secure performance and pump
efficiency are defined and decided
for each individual application. It
can include such things as impeller
trimming, wear part control and
replacement, control of zinc-anodes
and control of the stator.
Major overhaul To secure a long operating lifetime
for the product. It includes
replacement of key components
and the measures taken during an
inspection.
NOTICE:
Shorter intervals may be required when the operating conditions are extreme, for example
with very abrasive or corrosive applications or when the liquid temperatures exceed 40°C
(104°F).
Service item Action
Cable
1. If the outer jacket is damaged, replace the cable.
2. Check that the cables do not have any sharp bends and are not
pinched.
conditions at media (liquid)
temperatures <40°C.
Up to every 3 years. This interval
apply to normal applications and
operating conditions at media
(liquid) temperatures <40°C.
Connection to power Check that the connections are properly tightened.
Electrical cabinets Check that they are clean and dry.
Impeller
Stator housing
Insulation Use a megger maximum 1000 V.
Junction box Check that it is clean and dry.
Lifting device Check that local safety regulations are followed.
Lifting handle
O-rings
1. Check the impeller clearance.
2. Adjust the impeller, if necessary.
1. Drain all liquid, if any.
2. Check the resistance of the leakage sensor.
Normal value approximately 1530 ohms, alarm approximately
330 ohms.
1. Check that the resistance between the earth (ground) and
phase lead is more than 5 megohms.
2. Conduct a phase-to-phase resistance check.
1. Check the screws.
2. Check the condition of the lifting handle.
3. Replace if necessary.
1. Replace the oil plug O-rings.
2. Replace the O-rings at the entrance or junction cover.
3. Grease the new O-rings.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 33
WS006089A
WS006090A
Maintenance
Service item Action
Personnel safety devices Check the guard rails, covers, and other protections.
Rotation direction Check the impeller rotation.
Oil housing Fill with new oil, if necessary.
Terminal block/closed end splice Check that the connections are properly tightened/connected.
Thermal contacts Normally closed circuit; interval 0–1 ohm.
Voltage and amperage Check the running values.
Major overhaul
For a major overhaul, take this action in addition to the tasks listed under Inspection.
Service item Action
Support and main bearing Replace the bearings with new bearings.
Mechanical seal Replace with new seal units.
Service in case of alarm
For information about indication values for sensors, see Sensor connection characteristics
(page 26).
Replace the impeller
Figure 9: C-impeller
Figure 10: D-impeller
Required tools:
• 6 mm hexagon bit adapter with an extension of at least 125 mm (4.92 in.)
• Impeller puller
If applicable, contact your local sales and service representative for correct type and
size.
• Rod (wooden or copper) for locking the impeller in place, if applicable.
• Two crowbars, if applicable
34 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
WARNING:
• If you fail with the impeller installation, you must redo the installation procedure from the
beginning.
• A worn impeller and/or pump housing can have very sharp edges. Wear protective
gloves.
• When laying the pump on its side, do not allow the weight of the pump to rest on any
portion of the impeller. The impeller must not be allowed to make contact with the
concrete floor or other hard and rough surfaces.
Remove the impeller
CAUTION:
A worn impeller and/or pump housing can have very sharp edges. Wear protective gloves.
1. Lay the pump on its side.
2. Remove the suction cover.
3. Remove the impeller screw.
4. Remove the impeller.
5. Remove the conical sleeve.
Maintenance
If applicable, use the rod.
Use the impeller puller or the crowbars.
Install the impeller
1. Make sure that the end of the shaft is clean and free from burrs.
2. Mount the impeller:
3. Mount the suction cover:
Polish off any flaws with a fine emery cloth.
a) Fit the conical sleeve onto the shaft.
b) Press the impeller onto the shaft with the lubricated impeller screw.
c) Tighten the impeller screw.
For tightening torque, see Torque values (page 30).
If applicable, use the rod.
Check that the impeller can rotate freely.
a) Fit the suction cover to the pump housing.
b) Fit and tighten the lubricated screws.
For tightening torque, see Torque values (page 30).
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 35
Troubleshooting
Troubleshooting
Introduction
Follow these guidelines when troubleshooting the pump:
• Disconnect and lock out the power supply except when conducting checks that
require voltage.
• Make sure that no one is near the pump when the power supply is reconnected.
• When troubleshooting electrical equipment, use the following:
• Universal instrument multimeter
• Test lamp (continuity tester)
• Wiring diagram
The pump does not start
WARNING:
Always disconnect and lock out power before servicing to prevent unexpected startup.
Failure to do so could result in death or serious injury.
NOTICE:
Do NOT override the motor protection repeatedly if it has tripped. Doing so may result in
equipment damage.
Cause Remedy
An alarm signal has been triggered
on the control panel.
The pump does not start
automatically, but can be started
manually.
The installation is not receiving
voltage.
Check that:
• The impeller rotates freely.
• The sensor indicators do not indicate an alarm.
• The overload protection is not tripped.
If the problem still persists:
Contact the local sales and service representative.
Check that:
• The start level regulator is functioning. Clean or replace if necessary.
• All connections are intact.
• The relay and contactor coils are intact.
• The control switch (Man/Auto) makes contact in both positions.
Check the control circuit and functions.
Check that:
• The main power switch is on.
• There is control voltage to the start equipment.
• The fuses are intact.
• There is voltage in all phases of the supply line.
• All fuses have power and that they are securely fastened to the fuse
holders.
• The overload protection is not tripped.
• The motor cable is not damaged.
The impeller is stuck. Clean:
36 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Cause Remedy
• The impeller
• The sump in order to prevent the impeller from clogging again.
If the problem persists, contact the local sales and service representative.
The pump does not stop when a level sensor is used
WARNING:
Always disconnect and lock out power before servicing to prevent unexpected startup.
Failure to do so could result in death or serious injury.
Cause Remedy
Troubleshooting
The pump is unable to empty the
sump to the stop level.
There is a malfunction in the levelsensing equipment.
The stop level is set too low. Raise the stop level.
If the problem persists, contact the local Xylem service shop.
Check that:
• There are no leaks from the piping and/or discharge connection.
• The impeller is not clogged.
• The non-return valve(s) are functioning properly.
• The pump has adequate capacity. For information:
Contact the local sales and service representative.
• Clean the level regulators.
• Check the functioning of the level regulators.
• Check the contactor and the control circuit.
• Replace all defective items.
The pump starts-stops-starts in rapid sequence
Cause Remedy
The pump starts due to back-flow
which fills the sump to the start
level again.
Check that:
• The distance between the start and stop levels is sufficient.
• The non-return valve(s) work(s) properly.
• The length of the discharge pipe between the pump and the first non-
return valve is sufficiently short.
The self-holding function of the
contactor malfunctions.
If the problem persists, contact the local Xylem service shop.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 37
Check:
• The contactor connections.
• The voltage in the control circuit in relation to the rated voltages on the
coil.
• The functioning of the stop-level regulator.
• Whether the voltage drop in the line at the starting surge causes the
contactor's self-holding malfunction.
Troubleshooting
The pump runs but the motor protection trips
WARNING:
Always disconnect and lock out power before servicing to prevent unexpected startup.
Failure to do so could result in death or serious injury.
NOTICE:
Do NOT override the motor protection repeatedly if it has tripped. Doing so may result in
equipment damage.
Cause Remedy
The motor protection is set too low. Set the motor protection according to the data plate and if applicable the
cable chart.
The impeller is difficult to rotate by
hand.
The drive unit is not receiving full
voltage on all three phases.
The phase currents vary, or they are
too high.
The insulation between the phases
and ground in the stator is
defective.
The density of the pumped fluid is
too high.
There is a malfunction in the
overload protection.
If the problem persists, contact the local Xylem service shop.
• Clean the impeller.
• Clean out the sump.
• Check that the impeller is properly trimmed.
• Check the fuses. Replace fuses that have tripped.
• If the fuses are intact, notify a certified electrician.
Contact the local sales and service representative.
1. Use an insulation tester. With a 1000 V DC megger, check that the
insulation between the phases and between any phase and ground is
> 5 megohms.
2. If the insulation is less:
Contact the local sales and service representative.
Make sure that the maximum density is 1100 kg/m3 (9.2 lb/US gal)
• Change the impeller, or
• Change to a more suitable pump.
• Contact the local sales and service representative.
Replace the overload protection.
The pump delivers too little or no water
WARNING:
Always disconnect and lock out power before servicing to prevent unexpected startup.
Failure to do so could result in death or serious injury.
38 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Troubleshooting
NOTICE:
Do NOT override the motor protection repeatedly if it has tripped. Doing so may result in
equipment damage.
Cause Remedy
The impeller rotates in the wrong
direction.
• If it is a 3-phase pump, transpose two phase leads.
• If it is a 1-phase pump:
Contact the local sales and service representative.
One or more of the valves are set in
the wrong positions.
• Reset the valves that are set in the wrong position.
• Replace the valves, if necessary.
• Check that all valves are correctly installed according to media flow.
• Check that all valves open correctly.
The impeller is difficult to rotate by
hand.
• Clean the impeller.
• Clean out the sump.
• Check that the impeller is properly trimmed.
The pipes are obstructed. Clean out the pipes to ensure a free flow.
The pipes and joints leak. Find the leaks and seal them.
There are signs of wear on the
Replace the worn parts.
impeller, pump, and casing.
The liquid level is too low.
• Check that the level sensor is set correctly.
• Depending on the installation type, add a means for priming the pump,
such as a foot valve.
If the problem persists, contact the local Xylem service shop.
MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual 39
Technical Reference
Technical Reference
Motor data
Feature Description
Motor type Squirrel-cage induction motor
Frequency 60 Hz
Supply 1-phase or 3-phase
Starting method Direct on-line
Application limits
Maximum starts per
hour
Code compliance IEC 60034-1
Rated output variation ±10%
Voltage variation without
overheating
Voltage imbalance
tolerance
Stator insulation class
Data Description
Liquid temperature 40°C (104°F) maximum
Liquid density 1100 kg/m³ (9.2 lb per US gal) maximum
pH of the pumped media
(liquid)
• 30 evenly spaced starts per hour. Applicable for standard version.
• 15 evenly spaced starts per hour. Applicable for Ex-version.
±10%, provided that it does not run continuously at full load
2%
• H (180°C [360°F]). Applicable for standard version.
• F (155°C [310°F]). Applicable for Ex-version.
5.5–14
Depth of immersion 20 m (65 ft) maximum
Other For the specific weight, current, voltage, power ratings, and speed of the pump, see
the data plate of the pump.
40 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual
Xylem |’zīləm|
1) The tissue in plants that brings water upward from the roots
2) A leading global water technology company
We're 12,500 people unified in a common purpose: creating
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and return water to the environment, and we help people use water
efficiently, in their homes, buildings, factories and farms. In more than
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customers who know us for our powerful combination of leading
product brands and applications expertise, backed by a legacy of
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Seneca Falls, NY 13148
USA
Tel. 1-866-672-3669
Fax 1-888-322-5877
www.xyleminc.com/brands/
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The original instruction is in English. All nonEnglish instructions are translations of the original
instruction.
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2011 Xylem Inc.
Bell & Gossett is a trademark of Xylem Inc or one
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