Grundfos APG User manual

APG
50 Hz
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

APG
English (GB)
Installation and operating instructions ..................................5
Български (BG)
Упътване за монтаж и експлоатация.................................21
Deutsch (DE)
Montage- und Betriebsanleitung .....................................37
Dansk (DK)
Monterings- og driftsinstruktion ......................................54
Español (ES)
Instrucciones de instalación y funcionamiento............................70
Suomi (FI)
Asennus- ja käyttöohjeet ..........................................86
Français (FR)
Notice d'installation et de fonctionnement..............................102
Ελληνικά (GR)
Οδηγίες εγκατάστασης και λειτουργίας................................118
Hrvatski (HR)
Montažne i pogonske upute .......................................134
Magyar (HU)
Telepítési és üzemeltetési utasítás ..................................150
Italiano (IT)
Istruzioni di installazione e funzionamento .............................166
Nederlands (NL)
Installatie- en bedieningsinstructies ..................................182
Norsk (NO)
Installasjons- og driftsinstruksjoner ..................................198
Polski (PL)
Instrukcja montażu i eksploatacji....................................214
Português (PT)
Instruções de instalação e funcionamento .............................230
Română (RO)
Instrucţiuni de instalare şi utilizare...................................246
Srpski (RS)
Uputstvo za instalaciju i rad .......................................262
3
Table of contents

Русский (RU)
Паспорт, Руководство по монтажу и эксплуатации......................278
Svenska (SE)
Monterings- och driftsinstruktion ....................................295
Türkçe (TR)
Montaj ve kullanım kılavuzu .......................................311
中文 (CN)
安装和使用说明书 ..............................................327
(AR) ةيبرعلا
    .............................................342
4APG
Table of contents

English (GB) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General information ............. 5
1.1 Hazard statements .............. 5
1.2 Notes ..................... 5
2. Product introduction ............ 6
2.1 Pumped liquids ................ 6
2.2 Identification.................. 6
3. Receiving the product............ 7
3.1 Transporting the product ........... 7
3.2 Handling and lifting the product ....... 7
4. Mechanical installation ........... 7
4.1 Installation requirements ........... 7
4.2 Installation on auto coupling ......... 7
4.3 Free-standing installation ........... 9
5. Electrical connection ............10
5.1 Level controllers................10
5.2 Motor protection................11
6. Startup ....................14
6.1 Direction of rotation ..............15
7. Storing the product .............16
8. Maintenance and service ..........16
8.1 Maintenance schedule ............17
8.2 Cutter head replacement ...........17
8.3 Contaminated pumps .............18
9. Fault finding .................19
9.1 Motor does not start. Fuses blow, or
motor starter trips immediately.........19
9.2 Pump operates, but motor starter trips
after a short while. ..............19
9.3 Pump operates at below-standard
performance and power consumption. ....19
9.4 Pump operates, but supplies no liquid.....19
10. Technical data ................20
10.1 Operating conditions .............20
11. Disposing of the product ..........20
1. General information
Read this document before you install the
product. Installation and operation must
comply with local regulations and accepted
codes of good practice.
1.1 Hazard statements
The symbols and hazard statements below may
appear in Grundfos installation and operating
instructions, safety instructions and service
instructions.
DANGER
Indicates a hazardous situation which, if
not avoided, will result in death or serious
personal injury.
WARNING
Indicates a hazardous situation which, if
not avoided, could result in death or
serious personal injury.
CAUTION
Indicates a hazardous situation which, if
not avoided, could result in minor or
moderate personal injury.
The hazard statements are structured in the following
way:
SIGNAL WORD
Description of the hazard
Consequence of ignoring the warning
• Action to avoid the hazard.
1.2 Notes
The symbols and notes below may appear in
Grundfos installation and operating instructions,
safety instructions and service instructions.
Observe these instructions for explosion-
proof products.
A blue or grey circle with a white graphical
symbol indicates that an action must be
taken.
A red or grey circle with a diagonal bar,
possibly with a black graphical symbol,
indicates that an action must not be taken
or must be stopped.
5
English (GB)

If these instructions are not observed, it
may result in malfunction or damage to the
equipment.
Tips and advice that make the work easier.
2. Product introduction
2.1 Pumped liquids
Grundfos APG pumps are designed for pumping:
• wastewater
• sludge-containing water
• groundwater
• sewage from restaurants, hotels, campsites and
other facilities.
The compact design makes the pumps suitable for
both temporary and permanent installation. They are
also suitable for free-standing installation as well as
installation on an auto-coupling system.
APG pumps are equipped with a cutter system which
cuts all destructible solids into small pieces so that
they can flow through relatively small diameter pipes.
The pumps must not be used for
pumping combustible, flammable or
corrosive liquids.
2.2 Identification
2.2.1 Nameplate
TM066275
Pos. Description
1 Type designation
2 Model number
3 Maximum head
4 Rated speed
5 Number of phases
6 Rated input power/rated output power
7 Rated voltage, D
8 Rated current, D
9 Rated voltage, Y
10 Rated current, Y
11 Cos φ, 1/1-load
12 Insulation class
13 Enclosure class to IEC
14 Maximum installation depth
15 Maximum flow rate
16 Maximum liquid temperature
17 Production code (year/week)
6
English (GB)

3. Receiving the product
3.1 Transporting the product
The pump can be transported and stored in vertical
or horizontal position. Make sure that it cannot roll or
fall over. Make sure that the received product
corresponds to the order. In case of damage or
missing parts, inform the transport company or the
manufacturer immediately.
3.2 Handling and lifting the product
All lifting equipment must be rated for the purpose
and checked for damage before lifting the pump. The
lifting equipment rating must not be exceeded. The
pump weight is stated on the nameplate.
WARNING
Crushing hazard
Death or serious personal injury
‐Do not stack pump packages or pallets
on top of each other when lifting or
moving them.
‐Always lift the pump by its lifting
bracket or by a forklift truck, if the
pump is fixed on a pallet. Never lift the
pump by the power cable, hose or
pipe.
CAUTION
Sharp element
Minor or moderate personal injury
‐Wear protective gloves when opening
the pump package.
Keep the cable end protectors in storage
for later use.
WARNING
Crushing hazard
Death or serious personal injury
‐Make sure that your hand cannot get
caught between the lifting bracket and
the hook.
WARNING
Crushing hazard
Death or serious personal injury
‐Make sure that the hook is fixed to the
lifting bracket properly.
‐Always lift the pump by its lifting
bracket or by a forklift truck, if the
pump is fixed on a pallet.
‐Make sure that the lifting bracket is
tightened before lifting the pump.
4. Mechanical installation
The extra nameplate supplied with the pump should
be fixed at the installation site.
Prior to installation, check the oil level in the oil
chamber.
Related information
8. Maintenance and service
4.1 Installation requirements
Pump installation in pits must be carried
out by specially trained persons.
DANGER
Electric shock
Death or serious personal injury
‐It must be possible to lock the main
switch in position 0. Type and
requirements are specified in EN
60204-1.
DANGER
Electric shock
Death or serious personal injury
‐Make sure that there is at least 3 m
free cable above the maximum liquid
level.
Maintenance and service work must be
carried out when the pump is outside the
pit. For safety reasons, all work inside pits
must be supervised by a person outside
the pit.
WARNING
Crushing hazard
Death or serious personal injury
‐Make sure that the lifting bracket is
tightened before lifting the pump.
4.2 Installation on auto coupling
Pumps for permanent installation can be installed on
a stationary auto-coupling base and operated
completely or partially submerged in the pumped
liquid.
Make sure that the pipes are installed
without the use of undue force. No loads
from the weight of the pipes must be
carried by the pump. Use loose flanges to
ease the installation and to avoid pipe
tension at the flanges.
7
English (GB)

Do not use elastic elements or bellows to
connect the pipes.
In some installations, a plinth is required
beneath the auto coupling to ensure the
correct installation of the pump.
The free end of the cable must not be
submerged as water may penetrate into
the motor.
1. Drill mounting holes for the guide-rail bracket on
the inside of the pit, and fasten it provisionally with
two screws.
2. Place the auto-coupling base unit on the bottom
of the pit. Use a plumb line to establish the correct
position. Fasten the auto-coupling base unit with
heavy-duty expansion bolts. If the bottom of the
pit is uneven, the auto-coupling base unit must be
supported so that it is level when fastened.
3. Assemble the discharge line according to the
procedures and without exposing it to distortion or
tension.
4. Insert the guide-rails in the rings of the auto-
coupling base unit, and adjust their length to the
guide rail bracket accurately.
5. Unscrew the provisionally fastened guide rail
bracket, fit it on top of the guide-rails, and fasten it
to the pit wall firmly.
6. Clean any debris from the pit before lowering the
pump into it.
7. Fit the auto coupling to the discharge port of the
pump. Slide the guide bar of the auto coupling
between the guide rails, and lower the pump into
the pit by using a chain. When the pump reaches
the auto-coupling base unit, it automatically
connects tightly.
8. Hang the end of the chain on a suitable hook at
the top of the pit.
9. Adjust the length of the motor cable by coiling it
up on a relief fitting so the cable is not damaged
during operation. Fasten the relief fitting to a
suitable bracket at the top of the pit. Make sure
that the cables are not sharply bent or pinched.
TM082430
Lowering the pump to the auto-coupling base
TM082431
Connecting the pump to the auto-coupling base
8
English (GB)

4.3 Free-standing installation
The free end of the cable must not be
submerged as water may penetrate into
the motor.
If several pumps are installed in the same
pit, the pumps must be installed at the
same level to allow optimal pump
alternation.
APG pumps are provided with a separate base stand.
For free-standing installation of the pumps, fit a 90°
elbow on the discharge port. The pumps can be
installed either with a hose or a rigid pipe and valves.
Pumps for submerged ring-stand installation can
stand freely at the bottom of the pit or at any similar
location.
If a hose is used, make sure that it does not buckle
and that its inside diameter matches the outlet.
If a rigid pipe is used, fit the parts in the following
order:
1. union or coupling
2. non-return valve
3. isolating valve.
If it is installed in muddy conditions or on uneven
ground, place the pump on bricks.
1. Fit a 90° elbow to the pump outlet and connect
the outlet pipe or hose.
2. Lower the pump into the liquid using a chain
secured to the lifting bracket. Place the pump on a
plain, solid foundation.
3. Hang the end of the chain on a suitable hook at
the top of the pit. Make sure that the chain cannot
come into contact with the pump housing.
4. Adjust the length of the power cable by coiling it
up on a relief fitting to ensure that the cable is not
damaged during operation. Fasten the relief fitting
to a suitable hook at the top of the pit. Make sure
that the cables are not sharply bent or pinched.
5. Connect the power cable and the control cable, if
any.
TM082432
Installation on ring stand
9
English (GB)

5. Electrical connection
The electrical connection of the pump must be carried
out according to local regulations.
The operating voltage and frequency are stated on
the nameplate. Voltage tolerance: ± 10 % of the
voltage stated on the nameplate. Make sure that the
motor is suitable for the power supply available at the
installation site.
DANGER
Electric shock
Death or serious personal injury
‐Connect the pump to an external main
switch, which ensures all-pole
disconnection with a contact
separation according to EN 60204-1.
‐It must be possible to lock the main
switch in position 0. Type and
requirements as specified in EN
60204-1.
The permanent installation must be fitted
with an earth-leakage circuit breaker.
Make sure that there are at least 3 metres
of free cable above the maximum liquid
level.
DANGER
Electric shock
Death or serious personal injury
‐If the power cable is damaged, it must
be replaced by the manufacturer, a
service agent or a similarly qualified
person.
Set the motor-protective circuit breaker to
the rated current of the pump. The rated
current is stated on the nameplate.
The supply voltage and frequency are marked on the
nameplate. Make sure that the power supply at the
installation site is suitable for the pump motor.
All pumps are supplied with a 10-metre cable and a
free cable end.
DANGER
Electric shock
Death or serious personal injury
‐Before the first startup, check the cable
for visible defects to avoid short
circuits.
The pumps must be connected to one of the
following:
• a control unit with motor-protective circuit breaker,
such as Grundfos CU 100
• Grundfos LC 231 or 241 pump controller.
Pumps cannot be operated with frequency
converter.
5.1 Level controllers
The liquid level can be controlled by the Grundfos LC
level controllers.
Suitable level controllers:
• LC 231: compact solution with certified motor
protection for single- and dual-pump versions.
• LC 241: cabinet solution offering modularity and
customisation for single- and dual-pump versions.
In the following description, "level switches" can be air
bells, float switches or electrodes depending on the
selected pump controller.
Depending on the security levels and the number of
pumps, level switches can be used in the following
setups:
• Dry run (optional)
• Stop
• Start pump 1 (single-pump version)
• Start pump 2 (dual-pump version)
• High level (optional)
Analogue level transmitters can be used, and all
levels can be customised. Level switches can be
used with level transmitters, for dry-run protection and
high level alarm.
The pump must not run dry. Install an
additional level switch to ensure that the
pump is stopped in case the stop level
switch is not operating.
10
English (GB)

5.1.1 Installing level switches
When installing the level switches, observe the
following points:
• To prevent air intake and vibrations, install the
stop level switch, so the pump is stopped before
the liquid level is lowered to the middle of the
motor housing.
• Install the start level switch, so the pump is started
at the required level. The pump must always start
before the liquid level reaches the bottom inlet
pipe.
• Always install the high-level alarm switch about 10
cm above the start level switch. However, the
alarm must always be given before the liquid level
reaches the inlet pipe.
For further settings and information, see the
installation and operating instructions for the selected
level controllers.
5.2 Motor protection
All pumps are supplied with 10 metres of cable and a
free cable end.
APG pumps of 4.8 kW and above are prepared for
star-delta starting, such as both ends of the motor
windings are accessible through the motor cable.
• T1 and T3 are connected to the standard set
of bimetallic switches.
• T1 and T2 are connected to the extra set of
temperature sensors in explosion-proof
pumps. T2 is not used in standard execution, only
for APG on special request.
• S1 and S2 are connected to a moisture sensor in
the oil chamber.
5.2.1 Temperature sensors (in stator windings)
All pumps have integrated temperature sensors in the
stator windings.
Non-explosion proof pumps only have one set
of bimetallic switches.
Explosion proof pumps have two sets of temperature
sensors. The extra set of sensors opens at a
temperature that is about 10 °C higher than the
opening temperature of standard sensors. The extra
set of sensors provides additional protection against
overtemperature in potentially explosive
environments.
The temperature sensors must be connected to the
safety circuit of the motor-protective circuit breaker
through the temperature relay (No. 98123042).
The temperature sensors are connected to the
monitoring cable and must be connected to the
separate thermistor relay fitted in the safety circuit of
the pump controller.
The temperature sensors of pumps above 1.6 kW
and three-phase motors are connected to the power
supply cable. To ensure automatic restart of the motor
when cooled (to ambient temperature), the leads
marked T1 and T3 must be connected to the safety
circuit. The same applies to the leads marked T1 and
T2 in explosion proof versions.
Separate motor-protective circuit breakers/
control boxes must not be installed in
potentially explosive environments.
11
English (GB)

5.2.1.1 Wiring diagram
-X1
7
V1U1
U1
U2
V1 W1 T1
sw T3 S1 S2 b1
V2 W2
W1 U2 V2 W2 PE T1 S1 S2 PE
T3
5
U1
1 2 3 4 5 6 bf b1 bk bk
V1 W1 U2 V2 W2 T1 T3 S1 S2
gg
ФФ
TM082770
-X1
12
V1U1
U1
U2
V1 W1 T1
sw T3 S1 S2
b1
V2 W2
W1 U2 V2 W2 T1 S1 S2 PE
T3
U1
1 2 3 4 5 6 7 8 910
23 4 5
V1 W1 U2 V2 W2 T1 T3 S1 S2
ФФ
U1 V1 W1 U2 V2 W2 T1 T3 S1 S2
TM082771
12
English (GB)

Temperature relay
3.6KΩ
1.6KΩ
A1/A2
T1/T2
13-14, 21-22
TL
EMT6-DB AUTO
L +
N
US
A1 21 13
A2 T1 T2/T3 22 14
PTC
TM053448
Wiring diagram, temperature relay
Pos. Description
TL Tripped LED
13
English (GB)

5.2.2 Moisture sensor
This section applies only to APG.50.48, APG.50.65
and APG.50.92.
Pumps with moisture sensor have a sensor in the oil
chamber between the motor and the pump housing.
Through the separate level relay (No. 99010129), the
moisture sensor transmits a signal to the safety circuit
to trip the motor in case of ingress of moisture/water
into the pump. See fig. below.
R
U
1
2
3
4
A1 15
18 16
B3B1 B2
A2
B2
B1 B3
15
16 18
A1 A2
TM052304
Moisture relay wiring
6. Startup
Before starting the product:
• Make sure that the fuses are removed.
• Make sure that all protective
equipment is connected correctly.
• Check the oil level.
• Test the insulation resistance.
CAUTION
Hot surface
Minor or moderate personal injury
‐If the float switches do not work
properly, dry running the pump may
cause overheating. Make sure that the
float switches can move freely.
CAUTION
Crushing of hands
Minor or moderate personal injury
‐Do not put your hands or any tool into
the pump inlet or outlet after the pump
is connected to the power supply,
unless it is switched off by removing
the fuses or switching off the main
switch.
‐Make sure that the power supply
cannot be switched on unintentionally.
CAUTION
Biological hazard
Minor or moderate personal injury
‐Make sure to seal the pump outlet
properly when fitting the outlet pipe,
otherwise water might spray out.
WARNING
Crushing of hands
Death or serious personal injury
‐When lifting the pump, make sure that
your hand cannot get caught between
the lifting bracket and the hook.
DANGER
Crushing hazard
Death or serious personal injury
‐Make sure that the hook is fixed
properly to the lifting bracket.
‐Always lift the pump by its lifting
bracket or by a forklift truck, if the
pump is fixed on a pallet.
‐Never lift the pump by the power cable,
hose or pipe.
‐Make sure that the lifting bracket is
tightened before lifting the pump.
DANGER
Electric shock
Death or serious personal injury
‐Before the first start-up, check the
power cable for visible defects to avoid
short circuits.
‐If the power cable is damaged, it must
be replaced either by the manufacturer,
a service agent or a similarly qualified
person.
‐Make sure that the product is earthed
properly.
‐Switch off the power supply and lock
the main switch in position 0.
‐Switch off any external voltage
connected to the product before
working on it.
CAUTION
Biological hazard
Minor or moderate personal injury
‐Flush the pump thoroughly with clean
water and rinse the pump parts after
dismantling.
‐Wear appropriate personal protective
equipment and clothing.
14
English (GB)

CAUTION
Hot surface
Minor or moderate personal injury
‐Do not touch the surface of the pump
while it is running.
Proceed as follows:
1. Check the oil level in the oil chamber.
2. Remove the fuses, and check whether the
impeller can rotate freely.
3. Check whether the monitoring units, if used, are
operating satisfactorily.
4. Check whether the system is filled with liquid and
vented.
5. Make sure that the pump is submerged in the
liquid.
6. Open the isolating valves, if fitted.
7. Check the setting of the level switches.
8. Start the pump.
The pump can be started for a very
short period of time without being
submerged to check the direction of
rotation.
6.1 Direction of rotation
Before starting up three-phase pumps, check the
direction of rotation. The direction of rotation should
be clockwise when viewed from above. When starting
up, the pump jerks in the opposite direction of the
direction of rotation. If the direction of rotation is
wrong, interchange two of the three phases of the
power supply.
TM082433
Jerk direction
The direction check must be performed
outside of the hazardous area.
6.1.1 Direction of rotation check: Procedure 1
The direction of rotation must be checked every time
the pump is connected to a new installation.
1. Start the pump, and check the quantity of water or
the discharge pressure.
2. Stop the pump, and interchange two of the three
phases to the motor.
3. Start the pump, and check the quantity of water or
the discharge pressure.
4. Stop the pump.
5. Compare the results from points 1 and 3. The
phase connection which gives the larger quantity
of water or the higher pressure gives the correct
direction of rotation.
6.1.2 Direction of rotation check: Procedure 2
The direction of rotation must be checked every time
the pump is connected to a new installation.
1. Let the pump hang from a lifting device such as
the chain used for lowering the pump into the pit.
2. Start and stop the pump while observing the
movement (jerk) of the pump.
3. If connected correctly, the pump jerks
counterclockwise.
4. If the direction of rotation is wrong, interchange
two phases in the power cable.
15
English (GB)

7. Storing the product
For periods of storage the pump must be protected
against moisture and heat.
After a period of storage, inspect the pump before
putting it into operation. Make sure that the impeller
can rotate freely. Pay attention to the condition of the
shaft seals, O-rings and the cable entries.
Leave the cable-end protectors on the
power and control cables until starting the
electrical connection. Whether insulated or
not, the free cable end must never be
exposed to moisture or water. Non-
compliance with this may cause damage
to the motor.
If the pump is being stored for more than
one month, turn the impeller at least every
month to prevent the seal faces of the
lower mechanical shaft seal from seizing
up.
If you do not do this, the shaft seal may be
damaged when the pump is started.
If the impeller cannot be turned, contact
Grundfos or an authorised service
workshop.
WARNING
Crushing hazard
Death or serious personal injury
‐Do not turn the impeller by hand.
Always use an appropriate tool.
8. Maintenance and service
WARNING
Electric shock
Death or serious personal injury
‐Before working on the product, switch
off the power supply. Make sure that
the power supply cannot be switched
on unintentionally.
CAUTION
Crushing of hands
Minor or moderate personal injury
‐Make sure that all rotating parts
stopped moving.
Before maintenance and service, make sure that the
pump is thoroughly flushed with clean water. Rinse
the pump parts in water after dismantling.
CAUTION
Pressurised system
Minor or moderate personal injury
‐When unscrewing the inspection screw
of the oil chamber, note that pressure
may have built up in the chamber. Do
not remove the screw until the
pressure is fully relieved.
Normally operating pumps should be inspected at
least once a year. If the pumped liquid is very muddy
or sandy, inspect the pump at shorter intervals.
When the pump is new or after replacement of the
shaft seals, check the oil level after one week of
operation.
For long and trouble-free operation of the pump,
check the following points regularly:
• power consumption
• oil level and oil condition.
If the oil contains water, it becomes greyish white.
Water in the oil may be due to a defective shaft
seal. The oil should be replaced after 3000 hours
of operation. Use Shell Ondina X420 oil or a
similar type.
Used oil must be disposed of according to
local regulations.
Pump type Quantity of oil in
oil chamber [l]
APG.50.48 1.90
APG.50.65 1.90
APG.50.92 1.90
• Cable entry
16
English (GB)

Make sure that the cable entry is watertight and
that the cables are not bent sharply or pinched.
• Pump parts
Check the impeller, pump housing, neck ring and
other parts for possible wear. Replace defective
parts.
• Ball bearings
Check the shaft for noisy or heavy operation (turn
the shaft by hand). Replace defective ball
bearings. A general overhaul of the pump is
required in case of defective ball bearings or poor
motor function. This work must be carried out by
the manufacturer or a competent workshop.
8.1 Maintenance schedule
Before initial startup or after a longer period of
storage:
• Check the insulation resistance.
• Check the fill level in the sealing chamber.
• Check possible damage on the axial face seal.
Monthly:
• Monitor the power input and voltage.
• Check the used switchgears for
resistance and sealed space control.
Every six months:
• Inspect the power supply cable.
• Inspect the cable holder and wiring.
• Inspect the accessories, such as the suspension
device and hoisting gears.
After 1000 operating hours or after six months,
whichever is earlier:
• Monitor current consumption and voltage
• Check the relays for posistors, sealing room, etc.
• Inspect power supply cable
• Inspect cable holder and cable bracing
• Inspect accessories, e.g. suspension device and
hoisting gears
After 3000 operating hours:
• Perform visual check of the pump and inspect the
wear ring.
• Check the oil level and condition. Change the oil.
Change the shaft seal in case of water ingress or
oil leakage.
• Check the hydraulic components and wear ring for
wear. Replace if necessary.
After 8000 operating hours or two years:
• Check the insulation resistance
• Empty the leakage chamber. Not available for
all models. For more information, contact
Grundfos.
• Inspect all safety and control devices.
• Check the coating and touch-up as required.
After 15 000 operating hours or five years:
• General overhaul.
If the pump is used in highly abrasive or
corrosive matter, the maintenance
intervals should be reduced.
Tightening torques
A2/A4, Hardness
class 70
A2/A4, Hardness
class 80
DIN912 / DIN933
M6 7 Nm 11.8 Nm
M8 17 Nm 28.7 Nm
M10 33 Nm 58 Nm
M12 57 Nm 100 Nm
M16 140 Nm 245 Nm
M20 273 Nm 494 Nm
8.2 Cutter head replacement
Remove the cutter head.
Fit the new cutter head as follows:
1. Knock guide pin (560) into cutter head (23).
2. Fit the cutter head with guide pin on impeller
(230). Fit and tighten screw (900.01).
3. Fit threaded pins (904) in suction cover (162).
4. Fit O-ring (412.01) in the suction cover, and
grease the cover.
5. Knock the suction cover into pump housing (101)
until the suction cover bears against the impeller.
Check through the inlet port.
6. Tighten all threaded pins (904) until they easily
touch pump housing (101).
7. Give all threaded pins a quarter of a turn.
8. Fasten the suction cover with screws (914.01).
9. Fit cutting ring (50) to the suction cover. Fit and
tighten screws (900.02).
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English (GB)

990
163
914.05
412.01
433.01
932.01
230
560
23
900.01
101
412.12
162
904
914.01
900.02
50
TM017812
Exploded view
Pos. Component
23 Cutter head
50 Cutting ring
101 Pump housing
162 Suction cover
163 Pressure cover
Pos. Component
230 Impeller
412.01 O-ring
412.12 O-ring
433.01 Mechanical seal
560 Dowel pin
900.01 Screw
900.02 Screw
904 Threaded pin
914.01 Screw
914.05 Screw
932.01 Circlip
990 Motor oil
8.3 Contaminated pumps
If used for toxic or infectious liquid, the
pump is classified as contaminated.
If Grundfos is requested to service the pump,
Grundfos must be contacted with details about the
pumped liquid before the pump is returned for
service. Otherwise, Grundfos can refuse to accept the
pump for service.
Possible costs of returning the pump to the customer
are paid by the customer.
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English (GB)

9. Fault finding
WARNING
Electric shock
Death or serious personal injury
‐Before starting fault finding, switch off
the power supply. Make sure that the
power supply cannot be switched on
unintentionally.
CAUTION
Crushing of hands
Minor or moderate personal injury
‐Make sure that all rotating parts
stopped moving.
9.1 Motor does not start. Fuses blow, or
motor starter trips immediately.
Caution: Do not start again!
Cause Remedy
Supply failure; short-
circuit; earth-leakage
fault in cable or motor
winding
• Have the cable and
motor checked and
repaired by a qualified
electrician.
Fuses blow as they
are not the right type • Install fuses of the
correct type.
Impeller is blocked by
impurities • Clean the impeller.
9.2 Pump operates, but motor starter trips
after a short while.
Cause Remedy
Low setting of thermal
relay in motor starter • Set the relay according
to the specifications on
the nameplate.
Increased current
consumption due to
large voltage drop
• Measure the voltage
between motor
phases. Tolerance: ±
10 %.
Impeller is blocked by
impurities. Increased
current consumption
in all three phases.
• Clean the impeller.
9.3 Pump operates at below-standard
performance and power consumption.
Cause Remedy
Impeller blocked by
impurities. • Clean the impeller.
Wrong direction of
rotation.
Cause Remedy
• Check the direction of
rotation, and, if
necessary, interchange
two phases.
9.4 Pump operates, but supplies no liquid.
Cause Remedy
Discharge valve is
closed or blocked • Check the discharge
valve, and open and/or
clean it, if necessary.
Non-return valve is
blocked • Clean the non-return
valve.
Air in pump • Vent the pump.
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English (GB)

10. Technical data
10.1 Operating conditions
pH
APG pumps in permanent
installations can cope with pH-
values ranging from 4 to 10
Liquid
temperature
Liquid temperature: 0 °C to +40
°C
For short periods up to +60 °C
Density of
pumped liquid
Maximum density of pumped
liquid: 1100 kg/m3
Installation
depth
Maximum 10 metres below liquid
level
Level of
pumped liquid
The lowest stop level must always
be above the top of the pump
housing
Operation Maximum 15 starts per hour
The pumps are designed for intermittent
operation only.
The sound pressure level of the pump is
lower than the limiting values stated in the
EC Council Directive 98/37/EEC relating to
machinery.
11. Disposing of the product
This product or parts of it must be disposed of in an
environmentally sound way.
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
The crossed-out wheelie bin
symbol on a product means
that it must be disposed of
separately from household
waste. When a product
marked with this symbol
reaches its end of life, take it
to a collection point
designated by the local waste
disposal authorities. The
separate collection and
recycling of such products will
help protect the environment
and human health.
See also end-of-life information at
www.grundfos.com/product-recycling.
20
English (GB)