Grundfos CR Series User manual

CR, CRI, CRN
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions.
CONTENTS
Page
1. Symbols used in this document
2. Handling
When lifting the entire pump with motor, follow these instructions:
• Pump with motor sizes 0.37 - 5.5 kW:
Lift the pump in the motor flange by means of straps or the
like.
• Pump with motor sizes 7.5 - 22 kW:
Lift the pump by means of the motor eyebolts.
• Pump with motor sizes 30-45 kW:
Lift the pump by means of the lifting brackets on the motor
flange.
• Pump with motor sizes 55-75 kW:
Lift the pump by means of the eyebolts on the motor side.
Fig. 1 Correct lifting of a CR pump
In case of CR, CRI and CRN pumps with other motors than MG or
Siemens, we recommend you to lift the pump by means of the
straps in the motor flange.
1. Symbols used in this document 2
2. Handling 2
3. Type designation 3
3.1 Type key for CR, CRI, CRN 1s, 1, 3, 5, 10, 15 and 20 3
3.2 Type key for CR, CRN 32, 45, 64, 90, 120 and 150 3
4. Applications 3
5. Technical data 3
5.1 Ambient temperature and altitude 3
5.2 Liquid temperature 4
5.3 Maximum permissible operating pressure and liquid
temperature for the shaft seal 4
5.4 Minimum inlet pressure 4
5.5 Minimum inlet pressure 5
5.6 Minimum flow rate 5
5.7 Electrical data 5
5.8 Frequency of starts and stops 5
5.9 Dimensions and weights 5
5.10 Sound pressure level 5
6. Installation 5
6.1 Foundation 6
6.2 Vibration dampening 7
6.3 Outdoor installation 7
6.4 Hot surfaces 7
6.5 Torques 7
6.6 Flange forces and torques 8
7. Electrical connection 9
7.1 Cable entry/screwed connection 9
7.2 Three-phase connection 9
7.3 Single-phase connection 10
7.4 Terminal box positions 10
7.5 Frequency converter operation 10
8. Startup 11
8.1 Shaft seal run-in 11
9. Maintenance 11
10. Frost protection 12
11. Service 12
11.1 Service kits and manuals 12
12. Fault finding 13
13. Disposal 13
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Warning
If these safety instructions are not observed, it
may result in personal injury.
Warning
If these instructions are not observed, it may lead
to electric shock with consequent risk of serious
personal injury or death.
Caution
If these safety instructions are not observed, it
may result in malfunction or damage to the
equipment.
Note
Notes or instructions that make the job easier
and ensure safe operation.
TM04 0339 0608 TM04 0341 0608 TM05 9564 4113 TM04 0341 0608
0.37 - 5.5
kW
7.5 - 22
kW
30-45
kW
55-75
kW
Warning
Make sure that the pump remains in a stable
position during unpacking and installation by
means of the straps used for lifting the pump.
Note that typically the centre of gravity of the
pump is close to the motor.

English (GB)
3
3. Type designation
3.1 Type key for CR, CRI, CRN 1s, 1, 3, 5, 10, 15 and 20
3.2 Type key for CR, CRN 32, 45, 64, 90, 120 and 150
4. Applications
Grundfos multistage in-line centrifugal pumps, types CR, CRI and
CRN, are designed for a wide range of applications.
CR, CRI, CRN
CR, CRI and CRN pumps are suitable for liquid transfer,
circulation and pressure boosting of cold or hot clean liquids.
CRN
Use CRN pumps in systems where all parts in contact with the
liquid are made of high-grade stainless steel.
Pumped liquids
Thin, clean, non-flammable, non-combustible or non-explosive
liquids, not containing solid particles or fibres. The liquid must not
attack the pump materials chemically.
When pumping liquids with a density and/or viscosity higher than
that of water, use motors with correspondingly higher outputs, if
required.
5. Technical data
5.1 Ambient temperature and altitude
If the ambient temperature exceeds the above temperature
values or the pump is installed at an altitude exceeding the above
altitude values, the motor must not be fully loaded due to the risk
of overheating. Overheating may result from excessive ambient
temperatures or the low density and consequently low cooling
effect of the air.
In such cases, it may be necessary to use a motor with a higher
rated output.
Fig. 2 Motor output depends on temperature/altitude
Example
Figure 2shows that the load of an IE3 motor at an ambient
temperature of 70 °C must not be loaded more than 89 % of the
rated output. If the pump is installed 4750 metres above sea
level, the motor must not be loaded more than 89 % of the rated
output.
In cases where both the maximum temperature and the maximum
altitude are exceeded, the derating factors must be multiplied
(0.89 x 0.89 = 0.79).
Example CR3-10X-X-X-X-XXXX
Type range: CR, CRI, CRN
Nominal flow rate in m3/h
Number of impellers
Code for pump version
Code for pipework connection
Code for materials
Code for rubber pump parts
Code for shaft seal
Example CR 32- 2 1- X- X- X- X- XXXX
Pump range: CR, CRN
Nominal flow rate in m3/h
Number of stages
Number of impellers with reduced diameter
Code for pump version
Code for pipework connection
Code for materials
Code for rubber pump parts
Code for shaft seal
Motor
power
[kW]
Motor
make
Motor
efficiency
class
Maximum
ambient
temperature
[°C]
Maximum
altitude
above sea
level
[m]
0.37 - 0.55 Grundfos
MG - +40 1000
0.75 - 22 Grundfos
MG IE3 +60 3500
30 - 75 Siemens IE3 +55 2750
TM03 2479 4405
Pos. Motor power
[kW] Motor make
10.37 - 0.55 MG
0.37 - 22 MGE
20.75-22 MG
3 30-75 Siemens
Note
For motor bearing maintenance at ambient
temperatures above 40 °C, see section
9. Maintenance.
20 25 30 35 40 45 50 55 60 65 70 75 80
50
60
70
80
90
100
[%]
P2
2
1
t [°C]
1000 2250 3500 4750 m
3

English (GB)
4
5.2 Liquid temperature
The table on page 16 states the relationship between liquid
temperature range and maximum permissible operating pressure.
5.3 Maximum permissible operating pressure and
liquid temperature for the shaft seal
CR, CRI, CRN 1s to 20 and CR, CRN 32 to 150
Fig. 3 Maximum permissible operating pressure and liquid
temperature
CRI and CRN pumps using a type H shaft seal with EPDM rubber
parts, HxxE, can be cleaned in place (CIP) with liquids up to
150 °C for maximum 15 minutes.
CR, CRI, CRN pumps are not suitable for the pumping of liquids
above 120 °C for long periods.
5.4 Minimum inlet pressure
Fig. 4 Schematic view of open system with a CR pump
The maximum suction lift "H" in metres head can be calculated as
follows:
H = pbx 10.2 - NPSH - Hf- Hv- Hs
pb= Barometric pressure in bar.
(Barometric pressure can be set to 1 bar.)
In closed systems, pbindicates the system pressure in
bar.
NPSH = Net Positive Suction Head in metres head (to be read
from the NPSH curve on page 14 at the highest flow the
pump will be delivering).
Hf= Friction loss in suction pipe in metres head at the
highest flow the pump will be delivering.
Hv= Vapour pressure in metres head, see fig. E on page 19.
tm= liquid temperature.
Hs= Safety margin = minimum 0.5 metres head.
If the calculated "H" is positive, the pump can operate at a suction
lift of maximum "H" metres head.
If the calculated "H" is negative, an inlet pressure of minimum "H"
metres head is required. There must be a pressure equal to the
calculated "H" during operation.
Example
pb= 1 bar.
Pump type: CR 15, 50 Hz.
Flow rate: 15 m3/h.
NPSH (from page 14): 1.1 metres head.
Hf= 3.0 metres head.
Liquid temperature: +60 °C.
Hv(from fig. E, page 19): 2.1 metres head.
H = pbx 10.2 - NPSH - Hf- Hv- Hs [metres head].
H = 1 x 10.2 - 1.1 - 3.0 - 2.1 - 0.5 = 3.5 metres head.
This means that the pump can operate at a suction lift of
maximum 3.5 metres head.
Pressure calculated in bar: 3.5 x 0.0981 = 0.343 bar.
Pressure calculated in kPa: 3.5 x 9.81 = 34.3 kPa.
Note
The maximum permissible operating pressure
and liquid temperature ranges apply to the pump
only.
Note
The diagram below applies to clean water and
water containing anti-freeze liquids.
TM03 8853 4907
Standard shaft seal Motor
[kW]
Max. temperature range
[°C]
HQQE 0.37 - 45 -40 °C to +120 °C
HBQE 55 -75 0 °C to +120 °C
HQQV 0.37 - 45 -20 °C to +90 °C
HBQV 55-75 0 °C to +90 °C
Note
The pumping of liquids above +120 °C may result
in periodical noise and reduced pump life.
-60 -40 -20 020 40 60 80 100 120 140
0
5
10
15
20
25
30
35
p [bar]
HQQE/V
HBQE/V
H
Q
Q
E
H
Q
Q
E
H
B
Q
E
H
Q
Q
V
H
Q
Q
E
t [°C]
TM02 0118 3800
Hv
HNPSH
Pb
Hf

English (GB)
5
5.5 Minimum inlet pressure
The table on page 17 states the maximum permissible inlet
pressure. However, the actual inlet pressure + maximum pump
pressure (at no flow) must always be lower than the values stated
in fig. A, page 16.
The pumps are pressure-tested at a pressure of 1.5 times the
values stated in fig. B, page 17.
5.6 Minimum flow rate
Due to the risk of overheating, do not use the pump at flows
below the minimum flow rate.
The curves below show the minimum flow rate as a percentage of
the nominal flow rate in relation to the liquid temperature.
- - - - = air-cooled top.
Fig. 5 Minimum flow rate
5.7 Electrical data
See motor nameplate.
5.8 Frequency of starts and stops
5.9 Dimensions and weights
Dimensions: See fig. C, page 18.
Weights: See label on the packing.
5.10 Sound pressure level
See fig. D, page 19.
6. Installation
The pump must be secured to a horizontal, plane and solid
foundation by bolts through the holes in the base plate. When
installing the pump, follow the procedure below in order to avoid
damaging the pump.
TM01 2816 2302
Caution
The pump must not run against a closed
discharge valve.
Motor size
[kW] Maximum number of starts per hour
≤2.2 250
3-4 100
5.5 - 11 50
18.5 - 22 40
30 90
37 50
45 80
55 50
75 50
Step Action
1
TM02 0013 3800
Arrows on the pump base show
the direction of flow of liquid
through the pump.
40 60 80 100 120 140 160 180t [°C]
0
10
20
30
Qmin
[%]
2
TM00 2256 3393
This information is stated on
page 18:
• port-to-port lengths
• dimensions of the base
• pipework connections
• diameter and position of
foundation bolts.
3
TM01 1241 4097
The pump can be installed
vertically or horizontally (CR,
CRN 120 and 150, 75 kW, only
vertically). However, the motor
must neither fall below the
horizontal plane nor be
installed upside down.
Ensure that an adequate
supply of cool air reaches the
motor cooling fan.
Motors above 4 kW must be
supported.
3a
TM05 7705 1013
(Additional support for ships’
use)
To minimise pump vibrations,
additional support brackets can
be mounted. The brackets can
be fitted from the motor or the
motor stool to the bulkhead of
the ship. Mount the bracket in
horizontal position. To minimise
further vibration, mount the
bracket at an angle of 30-40 °
to the wall.
4
TM02 0116 3800
To minimise possible noise
from the pump, we advise you
to fit expansion joints on either
side of the pump.
The foundation/installation
must be carried out as
described in section 6.1.
Fit isolating valves on either
side of the pump to avoid
draining the system if the pump
needs to be removed for
cleaning, repair or
replacement.
Always protect the pump
against backflow by means of a
non-return valve (foot valve).
5
TM02 0114 3800
Install the pipes so that air
locks do not occur, especially
on the suction side of the
pump.
6
TM02 0115 3800
Fit a vacuum valve close to the
pump if the installation has one
of these characteristics:
• The discharge pipe slopes
downwards away from the
pump.
• There is a risk of siphon
effect.
• Protection against backflow
of unclean liquids is needed.
Step Action
2
1
2
1
L
LB
4 x ø
B

English (GB)
6
6.1 Foundation
Grundfos recommends to install the pump on a concrete
foundation which is heavy enough to provide permanent and rigid
support to the entire pump. The foundation must be capable of
absorbing any vibration, normal strain or shock. The concrete
foundation must have an absolutely level and even surface.
Place the pump on the foundation, and fasten it. The base plate
must be supported on the whole area.
The following instruction applies when mounting the pump in
vertical or horizontal position.
Place the pump on the foundation, and fasten it. See fig. 6.
Fig. 6 Correct installation
Fig. 7 Foundation, vertical mounting
The recommended length and width are shown in fig. 7. Note that
the length and width of the foundation for pumps with motor size
≤30 kW must be 200 mm larger than the base plate.
For pumps with motor size ≥37 kW, the length and width must
always be 1.5 x 1.5 (Lfx Bf) metres.
Fig. 8 Foundation, horizontal mounting
The foundation length and width should always be 200 mm larger
than the length and width of the pump. See fig. 8.
The mass of the foundation must be at least 1.5 times the total
mass of the pump. The minimum height of the foundation (hf) can
then be calculated:
The density (δ) of concrete is usually taken as 2,200 kg/m3.
In installations where noise-less operation is particularly
important, we recommend you to use a foundation with a mass up
to 5 times that of the pump.
The foundation must be provided with bolts for fixing the base
plate. See fig. 9.
6.2 Vibration dampening
Fig. 9 Bolt in foundation
When the foundation bolts are in position, the pump can be
placed on the foundation. The base plate can now be aligned
using shims, if necessary, so that it is completely horizontal.
See fig. 10.
Fig. 10 Alignment with shims
Note
The foundation/installation must be carried out in
accordance with the following instructions.
Non-compliance may result in functional faults
which will damage the pump components.
TM04 0342 0608TM04 0343 0608
TM05 9579 4113
hf= mpump ×1.5
Lf×Bf×δconcrete
TM03 4589 2206TM04 0362 0608
Shims

English (GB)
7
6.2 Vibration dampening
If vibration dampers are used, they must be installed under the
foundation. Pumps with motor size ≤30 kW can use vibration
dampers as shown in fig. 11.
For pumps with motor sizes ≥37 kW, use a Sylomer®plate as
shown in fig. 12.
Fig. 11 Pump on vibration dampers
Fig. 12 Pump on Sylomer®plate
6.3 Outdoor installation
When installed outdoors, we recommend you to provide the motor
with a rain cover. We also recommend you to open one of the
drain holes in the motor flange.
6.4 Hot surfaces
Figure 13 shows which pump parts get as hot as the pumped
liquid.
Fig. 13 Hot surfaces on a CR, CRI, CRN pump
6.5 Torques
The table shows the recommended torques for bolts in base and
flanges.
TM04 1691 1008TM04 1692 1008
Warning
When pumping hot liquids, care should be taken
to ensure that persons cannot accidentally come
into contact with hot surfaces.
TM04 0361 0608
Vibration dampers
Sylomer®plate
Pump head
Pump sleeve
Base
CR, CRI, CRN Base
[Nm]
Flange
[Nm]
1s-5 40 50-60
10-20 50 60-70
32-150 70 70-80

English (GB)
8
6.6 Flange forces and torques
If not all loads reach the maximum permissible value stated in the
tables below, one of these values may exceed the normal limit.
Contact Grundfos for further information.
Fig. 14 Flange forces and torques
Forces
Torques
TM04 0346 2013
Y-direction: Inlet/outlet
Z-direction: Direction of chamber stack
X-direction: 90 ° from inlet/outlet
Flange, DN [mm] CR, CRI, CRN Force, Y-direction [N] Force, Z-direction [N] Force, X-direction [N]
25/32 1s to 5 900 1050 850
40 10 1100 1250 1000
50 15 and 20 1500 1550 1350
65 32 1850 2100 1700
80 45 2500 2050 2250
100 64 and 90 3350 2700 3000
125/150 120 and 150 3350 2700 3000
Flange, DN [mm] CR, CRI, CRN Torque, Y-direction [Nm] Torque, Z-direction [Nm] Torque, X-direction [Nm]
25/32 1s to 5 1100 850 750
40 10 1300 1050 900
50 15 and 20 1400 1150 1000
65 32 1500 1200 1100
80 45 1150 1300 1600
100 64 and 90 1250 1450 1750
125/150 120 and 150 1250 1450 1750

English (GB)
9
7. Electrical connection
The electrical connection should be carried out by an authorised
electrician in accordance with local regulations.
The operating voltage and frequency are marked on the motor
nameplate. Make sure that the motor is suitable for the power
supply on which it will be used and the motor terminal connection
is correct. You will find a wiring diagram in the terminal box.
7.1 Cable entry/screwed connection
All motors are supplied without screwed cable entries. The table
below shows the numbers and sizes of cable entry holes of the
terminal box (standard EN 50262).
7.2 Three-phase connection
1) 60 Hz motors, 0.37 - 1.1 kW: 220-277/380-440 V.
Fig. 15 Delta connection
Fig. 16 Star connection
If the motor is provided with PTC sensors or PTO contacts, the
connection must be in accordance with the wiring diagram in the
terminal box.
Three-phase motors must be connected to a motor-protective
circuit breaker.
Warning
The CR pump must be connected to an external
mains switch placed close to the pump and to a
motor-protective circuit breaker or a CUE
frequency converter. It must be possible to lock
the mains switch in OFF position (isolated). Type
and requirements as specified in EN 60204-1,
5.3.2.
Warning
Before removing the terminal box cover and
before removing/dismantling the pump, make
sure that the power supply has been switched off
and that it cannot be accidentally switched on.
Caution
The user is to consider whether it is necessary to
install an emergency stop switch.
Motor
[kW]
Number and size
of cable entries Description
0.25 - 0.55 2 x M20 x 1.5
The holes have precast
threads and are closed with
knock-out cable entries
0.75 - 3.0 2 x M20 The holes are closed with
knock-out cable entries
4.0 - 7.5 4 x M25 The holes are closed with
knock-out cable entries
11-22 2 x M20
4 x M40
The holes are closed with
knock-out cable entries
30-45 2 x M50 x 1.5 Blanking plug
55-75 2 x M63 x 1.5 Blanking plug
Mains supply [V]
Delta connection Star connection
50 Hz 220-240 / 380-415
380-415 / 660-690
60 Hz 220-277 / 380-4801)
380-480 / 660-690
TM02 6656 1305TM02 6655 1305
W2 U2 V2
U1 V1 W1
U1
U2
V1
V2
W1
W2
L3
L2
L1
W2 U2 V2
U1
U1
V1
V1 W1
U2
V2
W1
W2
L
3
L
2
L
1

English (GB)
10
7.3 Single-phase connection
Fig. 17 Connection, "low voltage", 0.37 - 0.75 kW
Fig. 18 Connection, "high voltage", 0.37 - 0.75 kW
Fig. 19 Connection, "low voltage", 1.1 - 2.2 kW
Fig. 20 Connection, "high voltage", 1.1 - 2.2 kW
Single-phase Grundfos motors incorporate a thermal switch and
require no additional motor protection.
7.4 Terminal box positions
The terminal box can be turned to four positions, in 90 ° steps.
Follow this procedure:
1. If necessary, remove the coupling guards. Do not remove the
coupling.
2. Remove the bolts securing the motor to the pump.
3. Turn the motor to the required position.
4. Replace and tighten the bolts.
5. Replace the coupling guards.
Carry out the electrical connection as shown in the diagram
inside the terminal box cover.
7.5 Frequency converter operation
7.5.1 Motors supplied by Grundfos
All three-phase MG motors with phase insulation can be connected
to a frequency converter.
7.5.2 Phase insulation MG 71 and 80
MG motors, frame sizes 71 and 80, do not have phase insulation as
standard. The motors are not suitable for frequency converter
operation as they are not protected against the voltage peaks
caused by the frequency converter operation. Only motors with a
rated voltage equal to or above 460 V have phase insulation.
We recommend you to protect all other motors against voltage
peaks higher than 1200 V by 2000 V/μsec.
The above disturbances, i.e. both increased acoustic noise and
detrimental voltage peaks, can be eliminated by fitting an LC filter
between the frequency converter and the motor.
For further information, please contact the frequency converter or
motor supplier.
7.5.3 Other motor makes than those supplied by Grundfos
Please contact Grundfos or the motor manufacturer.
Mains supply [V]
"Low voltage" "High voltage"
50 Hz 220-230 / 240
TM04 1693 1008TM04 1694 1008TM04 0345 0608TM04 0344 0608
Caution
Frequency converter operation of MG motors
without phase insulation will cause damage to
the motor.

English (GB)
11
8. Startup
Fig. 21 Venting valve, standard and an optional solution with
hose connection.
Follow the instructions on page 34.
CR, CRI, CRN 1s to 5
For these pumps, we advise you to open the bypass valve during
startup, see fig. 22 for bypass valve location. The bypass valve
connects the suction and discharge sides of the pump, thus
making the filling procedure easier. Close the bypass valve again
when the operation is stable.
When pumping liquids containing air, we advise you to leave the
bypass valve open if the operating pressure is lower than 6 bar.
Close the bypass valve if the operating pressure constantly
exceeds 6 bar. Otherwise the material at the opening will be worn
because of the high liquid velocity.
8.1 Shaft seal run-in
The seal faces are lubricated by the pumped liquid, meaning that
there may be a certain amount of leakage from the shaft seal.
When the pump is started up for the first time, or when a new
shaft seal is installed, a certain run-in period is required before
the leakage is reduced to an acceptable level. The time required
for this depends on the operating conditions, i.e. every time the
operating conditions change, a new run-in period will be started.
Under normal conditions, the leaking liquid will evaporate.
As a result, no leakage will be detected.
However, liquids such as kerosene will not evaporate.
The leakage may therefore be seen as a shaft seal failure.
9. Maintenance
Pump bearings and shaft seal are maintenance-free.
Motor bearings
Motors not fitted with grease nipples are maintenance-free.
Motors fitted with grease nipples should be lubricated with a high-
temperature, lithium-based grease. See the instructions on the
fan cover.
In the case of seasonal operation (motor is idle for more than
6 months of the year), we recommend you to grease the motor
when the pump is taken out of operation.
Depending on the ambient temperature, the motor bearings must
be replaced or lubricated according to the table below. The table
applies to 2-pole motors. The number of operating hours stated
for bearing replacement are guidelines only.
Intervals for 4-pole motors are twice as long as those for 2-pole
motors.
If the ambient temperature is lower than 40 °C, bearings must be
replaced/lubricated at the intervals mentioned under 40 °C.
Caution
Do not start the pump until it has been filled with
liquid and vented. If the pump runs dry, the pump
bearings and the shaft seal may be damaged.
TM05 1160 0611 - TM05 8098 1913
Warning
Pay attention to the direction of the vent hole and
take care to ensure that the escaping water does
not cause injury to persons or damage to the
motor or other components.
In hot-water installations, pay special attention to
the risk of injury caused by scalding hot water.
Warning
Before starting work on the pump, make sure that
all power supplies to the pump have been
switched off and that they cannot be accidentally
switched on.
Motorsize
[kW]
Bearing replacement interval [operating hours]
40 °C 45 °C 50 °C 55 °C 60 °C
0.37 - 0.75 18000 ----
1.1 - 7.5 20000 15500 12500 10000 7500
Motorsize
[kW]
Lubrication interval [operating hours]
40 °C 45 °C 50 °C 55 °C 60 °C
11 - 18.5 4500 3400 2500 1700 1100
22 4000 3100 2300 1500 1000
30-55 4000 3000 2000 1500 -
75 2000 1500 1000 500 -

English (GB)
12
10. Frost protection
Pumps which are not being used during periods of frost should be
drained to avoid damage.
Drain the pump by loosening the vent screw in the pump head
and by removing the drain plug from the base.
Do not tighten the vent screw and replace the drain plug until the
pump is to be used again.
CR, CRI, CRN 1s to 5
Before replacing the drain plug in the base, screw the bypass
valve out against the stop. See fig. 22.
Fig. 22 Location of drain plug and bypass valve
Fit the drain plug by tightening the large union nut followed by the
bypass valve.
11. Service
We recommend you to repair pumps with motors of 7.5 kW and
up at pump site. Necessary lifting equipment must be available.
If Grundfos is requested to service the pump, Grundfos must be
contacted with details about the pumped liquid, etc. before the
pump is returned for service. Otherwise, Grundfos can refuse to
accept the pump for service.
Possible costs of returning the pump are to be paid by the
customer.
However, any application for service (no matter to whom it may
be made) must include details about the pumped liquid if the
pump has been used for liquids which are toxic or injurious to
health.
11.1 Service kits and manuals
Service kits and manuals for CR, CRI and CRN, see
www.grundfos.com (WebCAPS), WinCAPS or Service Kit
Catalogue.
Warning
Pay attention to the direction of the vent hole and
take care to ensure that the escaping water does
not cause injury to persons or damage to the
motor or other components.
In hot-water installations, pay special attention to
the risk of injury caused by scalding hot water.
TM01 1243 4097
Note
If a pump has been used for a liquid which is
toxic or injurious to health, the pump will be
classified as contaminated.
Drain plug
Bypass valve

English (GB)
13
12. Fault finding
13. Disposal
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.
Subject to alterations.
Warning
Before removing the terminal box cover and before removing/dismantling the pump, make sure that the power
supply has been switched off and that it cannot be accidentally switched on.
Fault Cause Remedy
1. Motor does not run
when started.
a) Supply failure. Connect the power supply.
b) Fuses are blown. Replace fuses.
c) Motor-protective circuit breaker has tripped. Reactivate the motor-protective circuit breaker.
d) Thermal protection has tripped. Reactivate the thermal protection.
e) Main contacts in motor-protective circuit breaker
are not making contact or the coil is faulty. Replace contacts or magnetic coil.
f) Control circuit is defective. Repair the control circuit.
g) Motor is defective. Replace the motor.
2. Motor-protective circuit
breaker trips
immediately when
power supply is
switched on.
a) One fuse/automatic circuit breaker is blown. Replace the fuse/cut in the circuit breaker.
b) Contacts in motor-protective circuit breaker are
faulty. Replace motor-protective circuit breaker contacts.
c) Cable connection is loose or faulty. Fasten or replace the cable connection.
d) Motor winding is defective. Replace the motor.
e) Pump mechanically blocked. Remove the mechanical blocking of the pump.
f) Motor-protective circuit breaker setting is too
low. Set the motor-protective circuit breaker correctly.
3. Motor-protective circuit
breaker trips
occasionally.
a) Motor-protective circuit breaker setting is too
low. Set the motor-protective circuit breaker correctly.
b) Low voltage at peak times. Check the power supply.
4. Motor-protective circuit
breaker has not tripped
but the pump does not
run.
a) Check 1 a), b), d), e) and f).
5. Pump performance not
constant.
a) Pump inlet pressure is too low (cavitation). Check the suction conditions.
b) Suction pipe/pump partly blocked by impurities. Clean the suction pipe/pump.
c) Pump draws in air. Check the suction conditions.
6. Pump runs but gives no
water.
a) Suction pipe/pump blocked by impurities. Clean the suction pipe/pump.
b) Foot or non-return valve blocked in closed
position. Repair the foot or non-return valve.
c) Leakage in suction pipe. Repair the suction pipe.
d) Air in suction pipe or pump. Check the suction conditions.
e) Motor runs in the wrong direction of rotation. Change the direction of rotation of the motor.
7. Pump runs backwards
when switched off.
a) Leakage in suction pipe. Repair the suction pipe.
b) Foot or non-return valve defective. Repair the foot or non-return valve.
8. Leakage in shaft seal. a) Shaft seal is defective. Replace the shaft seal.
9. Noise. a) Cavitation. Check the suction conditions.
b) Pump does not rotate freely (frictional
resistance) because of incorrect pump shaft
position.
Adjust the pump shaft.
Follow the procedure in fig. F, G or H at the end of
these instructions.
c) Frequency converter operation. See section 7.5 Frequency converter operation.

Appendix
14
Appendix 1
NPSH
TM02 7387 3403 TM02 7126 2703
TM01 9882 3801 TM02 7127 2703
TM01 9883 3300 TM01 1934 0899
TM01 9884 3801 TM01 1935 0899
TM02 7125 2703 TM01 1936 0899

Appendix
15
TM01 1937 0899TM03 8764 2507TM03 8765 2507

Appendix
16
Fig. A
Maximum permissible operating pressure / liquid temperature range
Oval PJE - CLAMP - CA - UNION
DIN - FGJ
Operating
pressure
Liquid temperature
range
Operating
pressure
Liquid temperature
range
50 Hz
CR, CRI, CRN 1s 16 bar -20 °C to +120 °C 25 bar -20 °C to +120 °C
CR, CRI, CRN 1 16 bar -20 °C to +120 °C 25 bar -20 °C to +120 °C
CR, CRI, CRN 3 16 bar -20 °C to +120 °C 25 bar -20 °C to +120 °C
CR, CRI, CRN 5 16 bar -20 °C to +120 °C 25 bar -20 °C to +120 °C
CR, CRI 10-1 →10-16 16 bar -20 °C to +120 °C 16 bar -20 °C to +120 °C
CR, CRI 10-17 →10-22 - - 25 bar -20 °C to +120 °C
CRN 10 - - 25 bar -20 °C to +120 °C
CR, CRI 15-1 →15-7 10 bar -20 °C to +120 °C - -
CR, CRI 15-1 →15-10 - - 16 bar -20 °C to +120 °C
CR, CRI 15-12 →15-17 - - 25 bar -20 °C to +120 °C
CRN 15 - - 25 bar -20 °C to +120 °C
CR, CRI 20-1 →20-7 10 bar -20 °C to +120 °C - -
CR, CRI 20-1 →20-10 - - 16 bar -20 °C to +120 °C
CR, CRI 20-12 →20-17 - - 25 bar -20 °C to +120 °C
CRN 20 - - 25 bar -20 °C to +120 °C
CR, CRN 32-1-1 →32-7 - - 16 bar -30 °C to +120 °C
CR, CRN 32-8-2 →32-14 - - 30 bar -30 °C to +120 °C
CR, CRN 45-1-1 →45-5 - - 16 bar -30 °C to +120 °C
CR, CRN 45-6-2 →45-11 - - 30 bar -30 °C to +120 °C
CR, CRN 45-12-2 →45-13-2 - - 33 bar -30 °C to +120 °C
CR, CRN 64-1-1 →64-5 - - 16 bar -30 °C to +120 °C
CR, CRN 64-6-2 →64-8-1 - - 30 bar -30 °C to +120 °C
CR, CRN 90-1-1 →90-4 - - 16 bar -30 °C to +120 °C
CR, CRN 90-5-2 →90-6 - - 30 bar -30 °C to +120 °C
CR, CRN 120 --30bar
-30 °C to +120 °C
CR, CRN 150 --30bar
-30 °C to +120 °C
60 Hz
CR, CRI, CRN 1s 16 bar -20 °C to +120 °C 25 bar -20 °C to +120 °C
CR, CRI, CRN 1 16 bar -20 °C to +120 °C 25 bar -20 °C to +120 °C
CR, CRI, CRN 3 16 bar -20 °C to +120 °C 25 bar -20 °C to +120 °C
CR, CRI, CRN 5 16 bar -20 °C to +120 °C 25 bar -20 °C to +120 °C
CR, CRI 10-1 →10-10 16 bar -20 °C to +120 °C 16 bar -20 °C to +120 °C
CR, CRI 10-12 →10-17 - - 25 bar -20 °C to +120 °C
CRN 10 16 bar -20 °C to +120 °C 25 bar -20 °C to +120 °C
CR, CRI 15-1 →15-5 10 bar -20 °C to +120 °C - -
CR, CRI 15-1 →15-8 - - 16 bar -20 °C to +120 °C
CR, CRI 15-9 →15-12 - - 25 bar -20 °C to +120 °C
CRN 15 10 bar -20 °C to +120 °C 25 bar -20 °C to +120 °C
CR, CRI 20-1 →20-5 10 bar -20 °C to +120 °C - -
CR, CRI 20-1 →20-7 - - 16 bar -20 °C to +120 °C
CR, CRI 20-8 →20-10 - - 25 bar -20 °C to +120 °C
CRN 20 10 bar -20 °C to +120 °C 25 bar -20 °C to +120 °C
CR, CRN 32-1-1 →32-5 - - 16 bar -30 °C to +120 °C
CR, CRN 32-6-2 →32-10-2 - - 30 bar -30 °C to +120 °C
CR, CRN 45-1-1 →45-4 - - 16 bar -30 °C to +120 °C
CR, CRN 45-5-2 →45-7 - - 30 bar -30 °C to +120 °C
CR, CRN 64-1-1 →64-3 - - 16 bar -30 °C to +120 °C
CR, CRN 64-4-2 →64-5-2 - - 30 bar -30 °C to +120 °C
CR, CRN 90-1-1 →90-3 - - 16 bar -30 °C to +120 °C
CR, CRN 90-4-2 - - 30 bar -30 °C to +120 °C
CR, CRN 120 - - 30 bar -30 °C to +120 °C
CR, CRN 150 - - 30 bar -30 °C to +120 °C

Appendix
17
Fig. B
Maximum inlet pressure for CR, CRI and CRN
50 Hz 60 Hz
CR, CRI, CRN 1s
CR, CRI, CRN 1s-2 →CR, CRI, CRN 1s-36 10 bar CR, CRI, CRN 1s-2 →CR, CRI, CRN 1s-27 10 bar
CR, CRI, CRN 1
CR, CRI, CRN 1-2 →CR, CRI, CRN 1-36 10 bar CR, CRI, CRN 1-2 →CR, CRI, CRN 1-25
CR, CRI, CRN 1-27
10 bar
15 bar
CR, CRI, CRN 3
CR, CRI, CRN 3-2 →CR, CRI, CRN 3-29
CR, CRI, CRN 3-31 →CR, CRI, CRN 3-36
10 bar
15 bar
CR, CRI, CRN 3-2 →CR, CRI, CRN 3-15
CR, CRI, CRN 3-17 →CR, CRI, CRN 3-25
10 bar
15 bar
CR, CRI, CRN 5
CR, CRI, CRN 5-2 →CR, CRI, CRN 5-16
CR, CRI, CRN 5-18 →CR, CRI, CRN 5-36
10 bar
15 bar
CR, CRI, CRN 5-2 →CR, CRI, CRN 5-9
CR, CRI, CRN 5-10 →CR, CRI, CRN 5-24
10 bar
15 bar
CR, CRI, CRN 10
CR, CRI, CRN 10-1 →CR, CRI, CRN 10-6
CR, CRI, CRN 10-7 →CR, CRI, CRN 10-22
8 bar
10 bar
CR, CRI, CRN 10-1 →CR, CRI, CRN 10-5
CR, CRI, CRN 10-6 →CR, CRI, CRN 10-17
8 bar
10 bar
CR, CRI, CRN 15
CR, CRI, CRN 15-1 →CR, CRI, CRN 15-3
CR, CRI, CRN 15-4 →CR, CRI, CRN 15-17
8 bar
10 bar
CR, CRI, CRN 15-1 →CR, CRI, CRN 15-2
CR, CRI, CRN 15-3 →CR, CRI, CRN 15-12
8 bar
10 bar
CR, CRI, CRN 20
CR, CRI, CRN 20-1 →CR, CRI, CRN 20-3
CR, CRI, CRN 20-4 →CR, CRI, CRN 20-17
8 bar
10 bar
CR, CRI, CRN 20-1
CR, CRI, CRN 20-2 →CR, CRI, CRN 20-10
8 bar
10 bar
CR, CRN 32
CR, CRN 32-1-1 →CR, CRN 32-4
CR, CRN 32-5-2 →CR, CRN 32-10
CR, CRN 32-11-2 →CR, CRN 32-14
4 bar
10 bar
15 bar
CR, CRN 32-1-1 →CR, CRN 32-2
CR, CRN 32-3-2 →CR, CRN 32-6
CR, CRN 32-7-2 →CR, CRN 32-10-2
4 bar
10 bar
15 bar
CR, CRN 45
CR, CRN 45-1-1 →CR, CRN 45-2
CR, CRN 45-3-2 →CR, CRN 45-5
CR, CRN 45-6-2 →CR, CRN 45-13-2
4 bar
10 bar
15 bar
CR, CRN 45-1-1 →CR, CRN 45-1
CR, CRN 45-2-2 →CR, CRN 45-3
CR, CRN 45-4-2 →CR, CRN 45-7
4 bar
10 bar
15 bar
CR, CRN 64
CR, CRN 64-1-1 →CR, CRN 64-2-2
CR, CRN 64-2-1 →CR, CRN 64-4-2
CR, CRN 64-4-1 →CR, CRN 64-8-1
4 bar
10 bar
15 bar
CR, CRN 64-1-1
CR, CRN 64-1 →CR, CRN 64-2-1
CR, CRN 64-2 →CR, CRN 64-5-2
4 bar
10 bar
15 bar
CR, CRN 90
CR, CRN 90-1-1 →CR, CRN 90-1
CR, CRN 90-2-2 →CR, CRN 90-3-2
CR, CRN 90-3 →CR, CRN 90-6
4 bar
10 bar
15 bar
CR, CRN 90-1-1 →CR, CRN 90-2-2
CR, CRN 90-2-1 →CR, CRN 90-4-2
10 bar
15 bar
CR, CRN 120
CR, CRN 120-1 →CR, CRN 120-2-1
CR, CRN 120-2 →CR, CRN 120-5-1
CR, CRN 120-6-1 →CR, CRN 120-7
10 bar
15 bar
20 bar
CR, CRN 120-1
CR, CRN 120-2-2 →CR, CRN 120-3
CR, CRN 120-4-1 →CR, CRN 120-5-2
10 bar
15 bar
20 bar
CR, CRN 150
CR, CRN 150-1-1 →CR, CRN 150-1
CR, CRN 150-2-1 →CR, CRN 150-4-1
CR, CRN 150-5-2 →CR, CRN 150-6
10 bar
15 bar
20 bar
CR, CRN 150-1-1
CR, CRN 150-1 →CR, CRN 150-2
CR, CRN 150-3-2 →CR, CRN 150-4-2
10 bar
15 bar
20 bar

Appendix
18
Fig. C
TM00 2256 3393
∅
[mm]
13 13 13 13 13 13 13 13
13.5
13
13.5
13
13.5
13 14 14 14 14 14 14 14 14 18 18 18 18
B2
[mm]
220 220 220 220 220 220 220 220 256 248 256 248 256 248 298 298 331 331 331 331 348 348 472 472 472 472
B1
[mm]
180 180 180 180 180 180 180 180 215 215 215 215 215 215 240 240 266 266 266 266 280 280 380 380 380 380
L2
[mm]
145 150 145 150 145 150 145 150 178 200 176 200 176 200 223 226 248 251 248 251 261 261 344 344 344 344
L1
[mm]
100 100 100 100 100 100 100 100 130 130 130 130 130 130 170 170 190 190 190 190 199 199 275 275 275 275
DIN - FGJ
TM00 2255 3393
DN
25/32 25/32 25/32 25/32 25/32 25/32 25/32 25/32
40 40 50 50 50 50 65 65 80 80
100 100 100 100 125 125 125 125
H
[mm]
75 75 75 75 75 75 75 75 80 80 90 90 90 90
105 105 140 140 140 140 140 140 180 180 180 180
L
[mm]
250 250 250 250 250 250 250 250 280 280 300 300 300 300 320 320 365 365 365 365 380 380 380 380 380 380
UNION
TM00 2254 3393
D
[G]
-
2
-
2
-
2
-
2
- - - - - - - - - - - - - - - - - -
H
[mm]
-
50
-
50
-
50
-
50
- - - - - - - - - - - - - - - - - -
L
[mm]
-
228
-
228
-
228
-
228
- - - - - - - - - - - - - - - - - -
CLAMP - FlexiClamp
TM00 2253 3393
D
[mm]
-
30
-
30
-
30
-
30
-
50
-
50
-
50
- - - - - - - - - - - -
H
[mm]
-
50
-
50
-
50
-
50
-
80
-
90
-
90
- - - - - - - - - - - -
L
[mm]
-
162
-
162
-
162
-
162
-
202
-
202
-
202
- - - - - - - - - - - -
PJE
TM00 2252 3393
D
[mm]
-
42.2
-
42.2
-
42.2
-
42.2
-
60.1
-
60.1
-
60.1
- - - - - - - - - - - -
H
[mm]
-
50
-
50
-
50
-
50
-
80
-
90
-
90
- - - - - - - - - - - -
L
[mm]
-
210
-
210
-
210
-
210
-
261
-
261
-
261
- - - - - - - - - - - -
Oval
TM00 2251 3393
D
[Rp]
1
-
1
-
1
-
1¼
-
1½
-
2
-
2
- - - - - - - - - - - - -
H
[mm]
50
-
50
-
50
-
50
-
80
-
80
-
80
- - - - - - - - - - - - -
L
[mm]
160
-
160
-
160
-
160
-
200
-
200
-
200
- - - - - - - - - - - - -
Pump
Type
CR 1s CRI, CRN 1s CR 1 CRI, CRN 1 CR 3 CRI, CRN 3 CR 5 CRI, CRN 5 CR 10 CRI, CRN 10 CR 15 CRI, CRN 15 CR 20 CRI, CRN 20 CR 32 CRN 32 CR 45 CRN 45 CR 64 CRN 64 CR 90 CRN 90 CR 120 CRN 120 CR 150 CRN 150
2
1
2
1
L
LB
4 x ø
B
H
L
DN
L
H
D
D
H
L
D
H
L
L
H
D

Appendix
19
Fig. D
Fig. E
Airborne noise emitted by pumps with motors fitted by Grundfos
Motor
[kW]
50 Hz 60 Hz
0.37 50 55
0.55 50 53
0.75 50 54
1.1 52 57
1.5 54 59
2.2 54 59
3.0 55 60
4.0 62 66
5.5 60 65
7.5 60 65
11 60 65
15 60 65
18.5 60 65
22 66 70
30 71 75
37 71 75
45 71 75
55 71 75
75 73 77
TM02 7445 3503
LpA
[dB(A)]
LpA
[dB(A)]
20
15
12
10
8,0
6,0
5,0
4,0
3,0
2,0
1,0
0,8
0,6
0,4
0,3
0,2
0,1
1,5
120
110
90
100
80
70
60
50
40
30
20
10
0
Hv
(m)
tm
(°C)
150
130
140
25
35
45
40
30
160
170
180
190
62
79
100
126

Appendix
20
CR, CRI, CRN 1s, 1, 3 and 5
Fig. F
A
TM02 0459 4600
B
TM02 0460 4600
C
TM02 1051 0501
D
TM02 1052 0501
M6 - 13 Nm
M8 - 31 Nm
M10 - 62 Nm
0.5x x
M5 - 2.5 Nm