ITT Industries FLYGT B2060 Maintenance manual

INSTALLATION, CARE
AND MAINTENANCE
2060/3060
890169/09

GUARANTEE
Hence, the guarantee does not cover faults caused
by deficient maintenance, improper installation, in-
correctly executed repair work or normal wear and
tear.
Flygt assumes no liability for either bodily injuries,
material damages or economic losses beyond what is
stated above.
Flygt guarantees that a spare parts stock will be kept
for 10 years after the manufacture of this product has
been discontinued.
The manufacturer reserves the right to alter perfor-
mance, specification or design without notice.
Flygt undertakes to remedy faults in products sold by
Flygt provided:
— that the fault is due to defects in design, materials
or workmanship;
— that the fault is reported to Flygt or Flygt’s repre-
sentative during the guarantee period;
— that the product is used only under conditions
described in the care and maintenance instructions
and in applications for which it is intended;
— that the monitoring equipment incorporated in the
product is correctly connected;
— that all service and repair work is done by a work-
shop authorized by Flygt;
— that genuine Flygt parts are used.
DATA PLATE INTERPRETATION
Product description_________________ 3
Applications _____________________________ 3
Dimensions and weights ___________________ 3
Design __________________________________ 3
Technical data ____________________________ 4
Transportation and storage________ 5
Installation ___________________________ 5
Safety precautions ________________________ 5
Installation alternatives ____________________ 5
Electrical connections _____________ 8
Before starting ___________________________ 11
Operation ____________________________ 11
Care and maintenance _____________ 12
Safety precautions ________________________ 12
Inspection _______________________________ 12
Changing the oil __________________________ 15
Replacing the diffuser (B 2060) _____________ 15
Replacing the impeller (B 2060) _____________ 15
Replacing the suction cover (C 3060) ________ 16
Replacing the impeller (C 3060) _____________ 16
Accessories and tools______________ 17
Fault tracing (Troubleshooting) ___ 18
Service log___________________________ 22
CONTENTS
Serial No.
Product No.
Product
code
Power factor
Curve No.
S-order No.
Rated current
Rated voltage
Stator connection
Shaft power
Special
Number of poles
Factory code
Consecu-
tive No.
Impeller/
propeller diam.
Number of phases,
type of current, frequence
Operating duty, cont./int.
Rotation speed
Weight
Insulation class
*Gear ratio*Direction of rotation
L = left R = right
*Rotation speed/blade angel
*propeller version *For mixers

3
PRODUCT DESCRIPTION
Design
B2060 and C3060 are submersible electric motor-
driven centrifugal pumps.
Impellers
The pump is available with the following types of
impellers:
B2060 — three-vane impeller of acid-proof steel or
stainless steel.
C3060 — two-vane impeller or vortex impeller of
stainless steel.
Shaft seals
The pump has two mechanical seals which provide
the isolation necessary between the electric motor and
the pumped liquid.
Materials:
Inner seal: ceramic—carbon.
Outer seal B2060: ceramic—tungsten carbide
C3060: ceramic—ceramic
Shaft
The shaft is delivered with the rotor as an integral part.
Shaft material: stainless steel.
Bearings
The pump bearings are designed for at least 15 000
hours of operation.
The lower bearing consists of a single-row ball bearing.
The upper bearing consists of a single-row ball bearing.
Oil casing
The oil lubricates and cools the seals and acts as a
buffer between the pump casing and the electric
motor.
Pressure build-up within the oil casing is reduced by
means of a built-in air volume.
Motor
Squirrel-cage 3-phase induction motor for 50 Hz or
60 Hz. The motor is also available for 1-phase, 60 Hz.
The motor is started by means of direct on-line start.
The motor can be run continuously or intermittently
with a maximum of 15 evenly spaced starts per hour.
The stator is insulated to class F, 155°C (310°F). The
motor is designed to supply its rated output at ± 5%
variation of the rated voltage. Without overheating the
motor, ± 10% variation of the rated voltage can be
accepted provided that the motor does not run
continuously at full load. The motor is designed to
operate with a voltage imbalance of up to 2% between
the phases.
Applications
B2060 and C3060 are designed for drainage respec-
tively pumping of industrial waste water, when high
demands regarding corrosion resistance are required.
Liquid temperature:
C2060 – max. 40°C (100°F).
C3060 – max. 70°C (160°F).
C3060 – max. 90°C (200°F) with external cooling.
Liquid density: Max. 1100 kg/m3(9.2 Ib per US gal).
The pumped liquid may contain particles up to a size
which corresponds to the openings in the strainer.
The pH of the pumped liquid: 5—11, depending of
the pumped liquid and its temperature. Contact your
nearest Flygt-representative for information.
Depth of immersion: max. 20 m (65 ft).
Pumps with a vortex impeller may not be operated at
a too low discharge head, since this causes overload-
ing of the motor. Contact your nearest Flygt-represen-
tative for information.
The pump shall not be used in
explosive or flammable environ-
ments or with flammable liquids.
For other applications, contact your nearest Flygt
representative for information.
Dimensions and weights
For dimensions see “Installation alternatives”.
Weight without motor cable:
B 2060 — 32 kg (70 Ibs)
C3060 — 41 kg (90 Ibs)

4
Monitoring equipment
The stator incorporates two thermal switches
connected in series.
The thermal switches open at 125°C (260°F) and
close at 70°C (160°F).
The monitoring equipment shall be of a design that
makes automatic restart impossible.
See also “Electrical connections” and separate
instructions for starters.
Cooling
B 2060
The stator is cooled by the pumped liquid passing
through the space between the stator casing and the
outer casing.
C 3060
The stator is cooled by the circulation of a portion of
the pumped liquid in the space between the stator
casing and the cooling jacket.
Under severe operating conditions and/or at high
temperatures of the pumped liquid, internal cooling
can be replaced by external cooling. Special rules
apply for connecting external cooling to fresh water
systems.
C3060 can also be operated without the outer casing,
in which case the lowest liquid level shall be above the
upper edge of the stator casing.
Technical data
B 2060
The pump curves show:
— input power at various operating points.
— flow rate versus total head.
C 3060
For information about the capacity of the pump, con-
tact your nearest Flygt-representative.
Capacity
50 Hz
Capacity
60 Hz
Input (kW)
Head (m)
Capacity (l/s)
Input (kW)
Head (m)
Capacity (l/s)
1-phase
3-phase
1-phase
3-phase

5
TRANSPORTATION AND STORAGE
The pump may be transported and stored in a vertical
or horizontal position. Make sure that it is securely
fastened and cannot roll or fall over.
Always lift the pump by its carrying handle or lifting
eyes, never by the motor cable or the hose.
The pump is frostproof as long as it is operating or is
immersed in the liquid. If the pump is taken up when
the temperature is below freezing, the impeller may
freeze. The pump shall be operated for a short period
after being taken up in order to expel all remaining
water.
A frozen impeller can be thawed by allowing the pump
to stand immersed in the liquid for a short period
before it is started. Never use an open flame to thaw
the pump.
For longer periods of storage, the pump must be
protected against moisture and heat. The impeller
should be rotated by hand occasionally (for example
every other month) to prevent the seals from sticking
together. If the pump is stored for more than 6 months,
this rotation is mandatory.
After a long period of storage, the pump should be
inspected before it is put into operation. Pay special
attention to the seals and the cable entry.
Follow the instructions under the heading “Before
starting”.
CP 3060
With discharge connection assembly
Control equipment for start, stop and alarm.
Cable holder for holding the cable and regulating the
height of the level sensors.
Access frame (with covers) to which the upper guide
bar bracket and cable holder can be attached.
Discharge connection for connecting the pump to
the discharge line. The discharge connection has a
flange which fits the flange on the station piping. The
pump casing mates with the discharge connection,
which also has bosses for holding the guide bars.
Safety precautions
In order to minimize the risk of accidents in connection
with the service and installation work, the following
rules should be followed:
1.Make sure the lifting equipment is in good condi-
tion.
2.Be aware of the risk of electrical accidents.
3.Use a safety helmet, safety goggles and protective
shoes.
4.Do not ignore the risk of drowning.
5.A first-aid kit must be handy.
Follow all other health and safety rules and local
codes and ordinances.
At certain installations and
operation points on the pump
curve the noise level 70 dB, or
for the actual pump specified
noise level, can be exceeded.
INSTALLATION
Installation alternatives
C3060
CP version
In the CP version, the pump is installed on a station-
ary discharge connection and operates completely or
partially submerged in the pumped liquid.
In addition to the pump, the following items are
required:
Guide bars consisting of two stainless steel pipes.
Upper guide bar bracket for attaching the guide bars
to the access cover or top of the station.

6
CP installation
All dimensions are in mm (in).
Provide a barrier around the pump pit, for example a
guard rail.
Arrange for a cable between the sump and the electric
control box. Make sure that the cables are not sharply
bent or pinched.
NOTE!
The end of the cable must not be
submerged. Leads have to be
above flood level, as water may
penetrate through the cable into
the junction box or the motor.
Place the access frame in position. Align the frame so
that it is horizontal and then grout it in place. Check
that the guide bars will be vertical using a level or
plumb line.
Install the anchor bolts in place. Be careful when
aligning and positioning the discharge connection in
relation to the access frame.
Place the discharge connection in position and tighten
it. Secure the guide bars in the brackets and dis-
charge bosses. Connect the discharge pipe to the
discharge connection.
Bolt the cable holder to the access frame.
Protect bolts and nuts with corrosion-preventive
compound.
Lower the pump along the guide bars. On reaching its
bottom position, the pump will automatically connect to
the discharge connection. Fasten the lifting chain on
the access frame eyebolt provided and the cables on
the cable holder. Cable supports are required for deep
installations. Run the cables up to the electric control
box.
Clean out debris from the sump before starting up the
station.
The pump can be hoisted up along the guide bars for
inspection without any connections having to be
undone.
CS version
In the CS version, the pump is transportable and
intended to operate completely or partially submerged
in the pumped liquid.
The pump is equipped with a connection for pipe, see
“Parts list”.
The pump stands on a strainer with a support plate.
CS installation
Run the cables so that they have no sharp bends, are
not pinched and cannot be sucked into the pump inlet.
Connect the discharge line and the motor cable. See
“Electrical connections”.
Lower the pump into the sump.
Place the pump on a base which prevents it from
sinking into a soft sump bottom.
Alternatively, the pump can be suspended from above
by its handle just above the bottom of the sump.
CS 3060
Portable

7
CT version
In the CT version, the pump is installed in a stationary
position in a dry well next to the wet sump.
The pump has a watertight motor and will therefore
not be damaged in the event of flooding in the pump
room.
The pump is liquid-cooled. See “Cooling”.
In addition to the pump, the following items are
required:
Base stand and anchor bolts for setting up the
pump.
Shut-off valves to permit the pump to be removed for
repair.
Air vent on discharge side between the pump and the
check valve.
CT installation
The pump should be positioned low in the dry pit for
effective drainage.
Bolt the base stand to the concrete base by means of
four grouted-in anchor bolts.
Bolt the pump to the stand.
Check that the pump is vertical.
Connect the motor cable, suction line and discharge
line.
Make sure that the weight of the pump does not bear
on the system piping.
NOTE! The risk of freezing is particularly great at
certain CT installations.
* Depending on the number of adjusting shims.
CT 3060
Dry installation
B2060
Pump installation
Run the cables so that they do not have any sharp
bends and are not pinched.
Connect the discharge connection and motor cable.
See “Electrical connections”.
Lower the pump into the sump.
Place the pump on a base which will prevent it from
sinking into a soft sump bottom. Alternatively, the
pump can be suspended by its handle just above the
sump bottom.
For tandem connection of pumps, see “Accessories
and tools”.
Consult your nearest Flygt representative regarding:
— sizing of sump, pumping station and access frame.
— choice of peripheral equipment.
— other problems in connection with installation.
B 2060

8
ELECTRICAL CONNECTIONS
6-lead stator
WARNING!
All electrical equipment must be
earthed. This applies to both
pump equipment and any
monitoring equipment.
Failure to heed this warning may
cause a lethal accident. Make
sure that the earth lead is
correctly connected by testing it.
Check that the main (line) voltage and frequency
agree with the specifications on the pump data plate.
The motor can be connected for different voltages as
shown on the data plate.
Install the motor cable as illustrated in the exploded
figure.
To avoid leakage into the pump, check:
— that the cable entry seal sleeve and washers
conform to the outside diameter of the cable. See
the parts list.
— that the outer jacket on the cable is not damaged.
When refitting a cable which has been used before,
always cut off a short piece of the cable so that the
cable entry seal sleeve does not close around the
cable at the same point again.
To protect the motor cable a stainless steel protection
hose can be ordered.
Please see under ACCESSORIES AND TOOLS (page
00). To prevent leakage thread tape should used
mounting the hose into the gland screw!
The stator leads are colour coded as follows:
6-and 9-lead stator 4-lead stator
U1 = Red U1 = Red
V1 = Brown U2 = Brown
W1 = Yellow Z1 = Yellow
U2 = Green Z2 = Black
V2 = Blue
W2 = Black
U5 = Red
V5 = Brown
W5 = YeIlow
The stator leads are connected to the terminal board
as illustrated in the figures.
Connect the motor cable to the terminal board as
follows. Check on the data plate which connection,
star or delta, is valid for used mains voltage.
Then, depending on mains voltage, mount the closing
links on the terminal board for star or delta connection,
see figure.

9
9-lead stator
* NOTE! When connecting pumps which
have 1 9-lead stator for 460V Y Ser. 60 Hz,
noclosinglinksshouldbeused.Forcorrect
connection,seeinsideofjunctionboxcover.

10
4-lead stator
(only 60 Hz, 1 phase)
Connect the control leads to the terminal board.
Make sure that the pump is correctly earthed
(grounded).
Install the cover (51).
Remember that the starting surge with the direct-on
line start can be up to six times higher than the rated
current.
Make sure that the fuses or circuit breakers are of the
proper amperage.
The tables give rated current. Fuse amperage and
cable shall be selected in accordance with local rules
and regulations. Note that with long cables, the
voltage drop in the cable must be taken into consider-
ation, since the motor’s rated voltage is the voltage
that is measured at the terminal board in the pump.
The overload protection (motor protection breaker)
shall be set to the motor’s operating current, but no
higher than the motor’s rated current as given on the
data plate.
NOTE!
For safety reasons, the earth
lead should be approx. 70 mm
(2.8") longer than the phase
leads. If the motor cable is jerked
loose by mistake, the earth lead
should be the last lead to come
loose from its terminal. This
applies to both ends of the cable.
B 2060/C 3060
60 Hz Rated current (A)
3-phase 220 V 380 V 460 V 575 V
2.7 kW (3.6 hp) 10 10 5.0 4.0
60 Hz Rated current (A)
1-phase 220 V 230 V — —
1.8 kW (2.5 hp) 11 11 — —
C 3060
50 Hz Rated current (A)
3-phase 220 V 380 V 440 V 550 V
2.4 kW 9.1 5.3 4.6 3.7
B 2060
50 Hz Rated current (A)
3-phase 220 V 380 V 440 V 550 V
2.2 kW 8.1 4.7 4.1 3.2

11
Before starting
Check the oil level in the oil casing.
Check that the monitoring equipment (if any) works.
Check the direction of rotation. See the figure. The
impeller shall rotate clockwise, as viewed from above.
When started, the pump will jerk in the opposite
direction to the direction in which the impeller rotates.
Beware!
The starting jerk on large pumps
can be powerful!
In the case of CT installation, the direction of rotation
is checked through the inlet elbow access cover.
The above measures are described under
“Inspection”.
Starting jerk
In order to avoid sedimentation when the pumped
medium contains solid particles, the velocity of the
medium in the discharge line should be:
Mixture Min. velocity in
discharge line
1. Water + coarse gravel 4 m/s (13.1 ft/s)
2. Water + gravel 3.5 m/s (11.5 ft/s)
3. Water + sand
3. Sand particles <0.1 mm
3. (0.004") 1.5 m/s (4.9 ft/s)
3. Sand particles <0.6 mm
3. (0.024") 2.5 m/s (8.2 ft/s)
The pump can be provided with level regulation in
order to prevent unnecessary wear on the hydraulic
components.
Cleaning
If the pump has been running in very dirty water, let it
run for a while in clean water, or flush it through the
discharge connection. If clay, cement or other similar
dirt is left in the pump it may clog the impeller and
sealings, preventing the pump from working.
OPERATION

12
Safety precautions
WARNING!
Before starting work on the
pump, make sure that the pump
is isolated from the power
supply and cannot be energized.
This applies to the control circuit
as well.
The following points are important in connection with
work on the pump:
— make sure that the pump has been thoroughly
cleaned.
— observe good personal hygiene.
— beware the risk of infection.
— follow local safety regulations.
The pump is designed for use in liquids which can be
hazardous to health. In order to prevent injury to the
eyes and skin, observe the following points when
working on the pump:
— Always wear goggles and rubber gloves.
— Rinse the pump thoroughly with clean water before
starting work.
— Rinse the components in water after diassembly.
— Hold a rag over the oil casing screw (OIL) and the
inspection screw (INSP) when removing them.
Otherwise, pressure that may have built up in the
pump due to the leakage of pumped liquid into the
pump may cause splatter into the eyes or onto skin.
Proceed as follows if you get hazardous chemicals
in your eyes:
— rinse immediately in running water for 15 minutes.
Hold your eyelids apart with your fingers.
— contact an eye doctor.
On your skin:
— remove contaminated clothes.
— wash skin with soap and water.
— seek medical attention if required.
CARE AND MAINTENANCE
Inspection
Regular inspection and preventive maintenance
ensure more reliable operation.
The pump should be inspected at least every 1000
hours, more frequently under severe operating condi-
tions.
Under normal operating conditions, the pump should
have a major overhaul in a service shop one a year.
This requires special tools and should be done by an
authorized service shop.
When the pump is new or when the seals have been
replaced, inspection is recommended after one week
of operation.
Service contract
Flygt or its agent offers service agreements in accor-
dance with a preventive maintenance plan. For further
information, please contact your Flygt representative.

13
Visible parts on pump
and installation
Pump casing and
impeller
Oil quantity
Recommended inspections:
Inspection of Action
Replace or fix worn and damaged parts.
Make sure that all screws, bolts and nuts are tight.
Check the condition of carrying handle/lifting eyes, chains and wire ropes.
Check that the guide bars are vertical.
Replace worn parts if they impair function.
Wear on the outlet flange on the pump casing usually causes corresponding wear
on the discharge connection.
Wear on the impeller and the parts around it necessitates fine adjustment of the
impeller or replacement of worn parts. See “Replacing the impeller” and “Replacing
the diffuser”.
WARNING. If the seal leaks, the oil casing may be under
pressure. Hold a rag over the oil casing screw in order to
prevent splatter. See “Safety precautions” for additional
information.
Check that the oil reaches up to the oil hole when the pump is lying down with the
oil hole up.
Add oil as needed. See “Changing the oil”.
A check of the condition of the oil can show whether there has been an increased
leakage. Note! Air/oil mixture can be confused with water/oil mixture.
Insert a tube (or hose) into the oil hole. Cover the top end of the tube and take up a
little oil from the bottom.
Change the oil if it contains too much water, i.e., is heavily emulsified (cream-like),
or if the water has settled out. See “Changing the oil”. Check again one week after
changing the oil.
If the oil contains too much water again, the fault may be:
— that an oil screw (OIL) is not sufficiently tight.
— that the O-ring or its sealing surface is damaged.
— that the lower seal (63) is damaged. Contact a Flygt service shop.
WARNlNG. If there has been leakage, the stator casing may
be under pressure. Hold a rag over the inspection screw to
prevent splatter. See “Safety precautions” for additional
information.
Note! Make sure that the power supply is turned off.
Remove cover (51).
Remove the inspection screw (16).
Check if there is any liquid in the stator casing.
If there is water in the stator casing, the cause may be:
— that an O-ring is damaged.
If there is oil in the stator casing, the cause may be:
— that the inner seal (72) is damaged. Contact a Flygt service shop.
— that an O-ring is damaged.
Condition of the oil
Liquid in the stator
casing

14
Inspection of Action
Make sure that the cable clamps are tight.
If the cable entry leaks:
— check that the entry is tightened so it bottoms out.
— cut a piece of the cable off so that the seal sleeve (40) closes around a new
position on the cable.
— replace the seal sleeve.
— check that the seal sleeve and the washers (13) conform to the outside
diameter of the cables.
Replace the cable if the outer jacket is damaged. Make sure that the cables do not
have any sharp bends and are not pinched.
Check function. Clean, adjust, replace or repair damaged level sensing equipment.
Follow the instructions for the level sensing equipment in question.
If faulty, contact an electrician.
Transpose two phase leads if the impeller does not rotate clockwise as viewed
from above. Rotation in the wrong direction reduces the capacity of the pump and
the motor may be overloaded. Check the direction of rotation, every time the pump
is reconnected.
Repair faults and notify supervisor of any faults or defects.
Contact a Flygt service shop.
Cable entry
Level sensors or other
level equipment
Cables
Starter equipment
Rotation direction
of impeller (requires
voltage)
Pipes, valves and other
peripheral equipment
Insulation resistance
in the stator

15
Changing the oil
WARNING. If the seal leaks, the oil casing may be
under pressure. Hold a rag over the oil plug to prevent
splatter.
Lay the pump on its side on a bench or over two
supports.
Unscrew the oil casing screw (OIL).
Turn the pump so that the oil hole faces downwards.
It is easier to drain the oil if the other oil hole screw is
also removed.
In order to get out all the oil, the pump must be raised
upright for a short while during drainage.
Fill with 0.5 litres (0.53 US quarts) of new oil. Use oil
filling tube (306 83 00) for filling oil in B2060.
A paraffin oil with viscosity close to ISO VG15 is
recommended (e.g. Mobil Whiterex 309), The pump is
delivered from factory with this type of oil.
In applications where poisonous properties are of less
concern, a mineral oil with viscosity up to ISO VG32
can be used.
Always replace the gaskets under the oil casing
screws. Place the screws back in.
B2060
Replacing the diffuser
Removing the diffuser
Lay the pump on its side.
Remove nuts (12) and pull off the strainer bottom (53).
Remove nuts (12).
Remove sleeves (58), diffuser (60) and springs (62).
Installing and adjusting the diffuser
Mount springs (62), diffuser (60) and sleeves (58).
To facilitate the adjustment of the lower diffuser there is
a special tool, 399 32 00. With this tool the lower diffuser
is pressed in position so that the sleeves (58) and nuts
(12) can be mounted.
Press the lower diffuser (60) against the impeller.
Mount the sleeves(58) and screw the adjusting nuts(12)
so that the sleeves lie flush against the lower diffuser.
Tighten the nuts (12) evenly all around.
The clearance between the impeller and the lower
diffuser shall be as little as possible.
Check that the impeller can easily be rotated by hand.
Install: Strainer bottom (53).
Mount and tighten the nuts (12) evenly all around.
Replacing the impeller
Removing the impeller
WARNING!
Worn impellers often have very
sharp edges.
Demount diffuser. See “Removing the diffuser”.
Remove impeller nut (45).
Pull off the impeller.
Use impeller puller 84 20 48.

16
Installing and adjusting the impeller
Make sure that the end of the shaft is clean and free
of burrs. Polish off any flaws.
Check:
— that an appropriate number of adjusting washers
(46) are on the shaft.
— that the key (1) is seated in the keyway on the shaft.
Grease end of shaft and impeller hub.
Press the impeller onto the shaft with the impeller nut.
Tighten the impeller nut.
The clearance between the impeller and the oil
casing bottom should be minimal when the impeller is
tightened. The clearance can be adjusted with the
adjusting washers (46).
Check that the impeller can easily be rotated by hand.
Mount the suction cover. See “Installing and adjusting
the suction cover”.
More extensive repairs require special tools and should
be carried out by an authorized service technician.
Installing and adjusting the impeller
Make sure that the end of the shaft is clean and free
of burrs. Polish off any flaws.
Check:
— that an appropriate number of adjusting washers
(46) are on the shaft.
— that the key (1) is seated in the keyway on the shaft.
Grease end of shaft.
Press the impeller onto the shaft with the impeller nut.
Tighten the impeller nut.
The clearance between the impeller and the oil
casing bottom should be minimal when the impeller is
tightened. The clearance can be adjusted with the
adjusting washers (46).
Check that the impeller can easily be rotated by hand.
Mount the diffuser. See “Installing and adjusting the
diffuser”.
C 3060
Replacing the suction cover
Removing the suction cover
Lay the pump on its side.
Remove nuts (12) and pull off the strainer bottom (53).
Remove the strainer (77).
Remove nuts (12).
Remove sleeves (83) and suction cover (85).
Installing and adjusting the suction cover
Check that a suitable number of adjusting washers (82)
are evenly distributed on the studs (19).
Press the suction cover against the impeller.
Place sleeves (83) and nuts (12) on the studs.
Tighten the nuts (12) evenly all around.
The clearance between the impeller and the suction
cover shall be as little as possible. About 0.3 mm(0.01").
If required, adjust with the adjusting washers (82).
Check that the impeller can easily be rotated by hand.
Install: Strainer (77)
Strainer bottom (53).
Mount and tighten the nuts (12) evenly all around.
In order for the pump to perform at maximum
capacity, the impeller must be adjusted regularly.
It is particularly important that the clearance between
the suction cover and the impeller is kept to a minimum.
Replacing the impeller
Removing the impeller
WARNING!
Worn impellers often have very
sharp edges.
Remove the suction cover. See “Removing the
suction cover”.
Remove impeller screw/nut (45).
Pull off the impeller.
Use impeller puller 84 20 48.

17
ACCESSORIES ANDTOOLS
Start and control equipment
Flygt has suitable start and control equipment for the
pump. Contact Flygt for further information.
Protection hose
In order to protect the motor cable it can be fitted with
a stainless steel protection hose.
Order No. 400 33 00.
Gland screw for protection hose.
Order No. 400 34 00.
Tools
The following tools are required in order to perform the
necessary care and maintenance of the pump:
Order No. Description
384 13 92 Socket, 19 mm
384 15 51 Extension, ½", L = 250 mm
384 15 61 Handle, L = 310 mm
384 20 48 Impeller puller
306 83 01 Oil filler tube
399 32 00 Adjustment tool
For further information on tools, see Flygt’s Tool
Catalogue.
Tandem operation
Tandem operation
The delivery head can be increased by connecting two
or three pumps in tandem.
Max. permissible operating pressure is 0.5 MPa
(71 psi).
The vertical distances between the pumps should be
approximately equal.
See special brochure that describes the procedure for
tandem connection.
The following complete connection units are available
for tandem connection:
B 2060
Order No. Intended for
377 26 00 3" hose or pipe R2½"
377 26 01 NPSM 3—8
C 3060
Order No.
314 92 00 with undrilled flange
(is also a pump stool)
314 92 01 with flange drilled for SMS 2031,
DIN 2631 and BS 4504:1969 Table 6/2
314 92 05 with flange drilled for ANSI B16.5:1968
Table 13.

18
FAULTTRACING (Troubleshooting)
A universal instrument (VOM), a test lamp (continuity
tester) and a wiring diagram are required in order to
carry out fault tracing on the electrical equipment.
Fault tracing shall be done with the power supply
disconnected and locked off, except for those checks
which cannot be performed without voltage.
Always make sure that there is no one near the
pump when the power supply is turned on.
Use the following checklist as an aid to fault tracing.
It is assumed that the pump and installation have
formerly functioned satisfactorily.
Electrical work should be performed by an authorized
electrician.
Follow local safety regulations and observe recom-
mended safety precautions.
Yes Replace.
Is the start capacitor defective?
(only for 1-phase motor)
No
Can the pump be started
manually?
Yes
No a) Fault in level equipment (start sensors).
Clean or replace.
b) Fault in control equipment.
Check:
— the controll current.
— that all connections are intact.
— relay and contactor coils.
— that the control switch “Man/Auto” makes contact in both
positions.
Is the installation receiving
voltage?
Yes
No Check:
— that the main power switch is on.
— that there is control voltage to the starter equipment and
that its fuses are intact.
— that there is voltage in each phase of the supply line.
— that all fuses have continuity and are tight.
— that the overload protection is reset.
— that there is no break in the motor cable.
1. Pump fails to start
Is the impeller stuck?
No
Yes Clean.
Clean the sump.
Contact Flygt service shop.
WARNING!
disconnect power before
checking the impeller.

19
2. Pump starts but motor protection trips
Is the motor protection
set too low?
(Check with data plate)
No
Yes Clean the impeller.
Clean out the sump.
Check that the impeller is not adjusted too tight.
If anything else is wrong, contact Flygt service shop.
Is the impeller difficult to
rotate by hand?
No
Yes Adjust.
No Check the motor fuses.
Notify an electrician.
Yes Contact Flygt service shop.
Yes Dilute the liquid.
Change to a more suitable pump.
Contact Flygt.
Yes Contact Flygt service shop.
Is the installation receiving full
voltage on all three phases?
Yes
Are the phase currents uneven
or too high?
No
Is the insulation between the
phases and earth (ground) in the
stator defective? (Use insulation
tester. With a 1000 V-DC megger,
the insulation between the phases
and between any phase and earth
(ground) should be > 1 MW)
No
Is the density of the pumped liquid
too high? Max density 1100 kg/m3,
9.2 lb/U.S. gal.
No
WARNING!
disconnect power before
checking the impeller.
Fault in bimetals in
motor protection?
No
Yes Replace defective bimetals (over current sensors).
Contact Flygt service shop.

20
3.The pump does not stop
Is the pump able to empty
the station to the stop level?
Yes
No Check:
— for leakage in pipe and/or discharge connection.
— that the impeller is not clogged.
WARNING: disconnect power before checking the impeller.
— that the pump has adequate capacity. Contact Flygt.
Fault in level sensing
equipment?
No
Yes Clean the level sensors.
Check the function of level sensors.
Replace defective items.
Stop level set too low?
No
Yes Raise the stop level.
4.The pump starts-stops-starts in rapid sequence
Does the pump start due to
backflow which fills sump to
start level again?
No
Contact Flygt service shop.
Yes Check:
— that the distance between the start and stop levels is not too
small.
— that the riser is not too long without a non-return valve.
Does the contactor’s
self-holding function break?
No
Yes Check:
— contactor connections.
— the voltage in the control circuit in relation to the rated
voltages on the coil.
— the functioning of stop sensor.
The voltage drop in the line at the starting surge makes the
contactor’s self-holding break.
Contact Flygt service shop.