Grundfos CR SF 32 Betriebsanleitung

CRN SF 32, 45, 64 and 90

Model B

Service instructions

GRUNDFOS INSTRUCTIONS

English (GB)

English (GB) Service instructions

Original service instructions

CONTENTS

Page

1. Symbols used in this document

2. General information

Position numbers of parts (digits) refer to drawings in section

8. Exploded views; position numbers of tools (letters) refer to

section 5. Service tools.

Electrical parts must only be serviced by Grundfos or an

authorised service workshop.

Before dismantling

• Close the isolating valves, if fitted, and make sure that they

cannot be accidentally opened.

• Before starting work on the product, let the product and

pumped liquid cool off.

• Note the centre of gravity of the pump to prevent it from

overturning. This is especially important in the case of long

pumps.

• Disconnect the electricity supply to the motor.

Before assembly

• Clean and check all parts.

• Replace defective parts with new parts.

• Order the necessary service kits.

• Always replace gaskets and O-rings.

During assembly

• Lubricate and tighten screws and nuts according to section

4. Torques and lubricants.

After assembly

• If analog or digital inputs, the relay output or the CIM module

has been removed from the pump, you must check the

communication with external units after service.

Disposal

This product or parts of it must be disposed of in an

environmentally sound way:

– Use the public or private waste collection service.

– If this is not possible, contact the nearest Grundfos company

or service workshop.

1. Symbols used in this document 3

2. General information 3

3. Identification 4

3.1 Nameplate 4

3.2 Type key 5

3.3 Code for shaft seal 6

4. Torques and lubricants 7

5. Service tools 8

5.1 Special tools 8

5.2 Standard tools 9

5.3 Torque tools 9

6. Dismantling and assembly 10

6.1 General information 10

6.2 Replacement of motor 10

6.3 Replacement of motor stool 11

6.4 Replacement of coupling 11

6.5 Replacement of shaft seal 11

6.6 Replacement of pump head 12

6.7 Replacement of chamber stack 13

6.8 Chamber stack 13

6.9 Pump head and shaft seal 14

6.10 CRN 32 SF order of assembly 15

6.11 CRN 45 SF order of assembly 16

6.12 CRN 64 SF order of assembly 17

6.13 CRN 90 SF order of assembly 18

7. Positions 19

8. Exploded views 20

Warning

Prior to service work, read these service instructions

carefully. Installation and service work must comply

with local regulations and accepted codes of good

practice.

Observe the safety instructions in the installation and

operating instructions for the product.

Warning

If these safety instructions are not observed, it may

result in personal injury.

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.

Warning

Use personal protective equipment if there is a risk of

getting into contact with the pumped liquid.

Observe local regulations.

Warning

Switch off the power supply and make sure that it

cannot be accidentally switched on.

Check that other pumps or sources do not force flow

through the pump even if the pump is stopped. This

will cause the motor to act like a generator, resulting

in voltage on the pump.

English (GB)

3. Identification

This section shows the type key, the nameplate and the codes

that can appear in the variant code.

3.1 Nameplate

Fig. 1 Nameplate

Note

As codes can be combined, a code position may

contain more than one code (letter).

TM05 6093 4512

Pos. Description

1 Type designation

2 Model

3 Frequency

4Shaftpower

5 Speed

6 Head against closed valve

7 Rated flow rate

8 Head at rated flow rate

9 Maximum pressure and temperature

Direction of rotation

CCW:Counterclockwise

CW:Clockwise

11 Not in use

12 The serial number of the pump

13 Country of production

14 Not in use

15 Not in use

16 Minimum Efficiency Index

17 Pump efficiency

96547135

14 16 17

Type

ڦS(%)

Pmax/tmax bar/°C

6HULDO12

Hmax m

Model

fHzP2kW

n min-1

PK

DK-8850 Bjerringbro, Denmark

0(,>

English (GB)

3.2 Type key

Example CRN 10- 21 SF- P- GI- E- HQQE

Type range

Rated flow rate, m3/h

Number of stages

Code for pump version

A = Basic version

B = Oversize motor

E = Certificate/approval

F = Pump for high temperatures (air-cooled top)

H = Horizontal version

HS = High-pressure pump with over-synchronous speed and reversed chamber stack

and direction of rotation

I = Differential pressure rating

K = Pump with low NPSH

M = Magnetic drive

P = Undersize motor

R = Horizontal version with bearing bracket

SF = High-pressure pump with reversed chamber stack and direction of rotation

T = Oversize motor (two flange sizes bigger)

X = Special version, or the pump consists of more than two versions

Code for pipe connections

A = Oval flange

B = NPT thread

CA = FlexiClamp (CRI, CRN)

CX = TriClamp (CRI, CRN)

F = DIN flange

FGJ = DIN, ANSI and JIS flange

GJ = ANSI and JIS flange

G = ANSI flange

J = JIS flange----

N = Different connection diameter

O = Externally threaded, union

P = PJE coupling

W = Internally threaded

X = Special version

Code for materials

A = Pump head: cast iron

Other parts in contact with the pumped liquid: stainless steel DIN W.-Nr. 1.4301

D = Carbon graphite-filled PTFE (bearings)

G = Stainless steel parts of DIN W.-Nr. 1.4401/AISI 316 or better class

I = Base plate and flanges of DIN W.-Nr. 1.4408/AISI 316LN or better class

I = Stainless steel parts of DIN W.-Nr. 1.4301/AISI 304 or similar class

II = All parts of stainless steel; parts in contact with the pumped liquid of DIN W.-Nr. 1.4301/AISI 304

K = Bronze (bearings)

S = Silicon carbide bearings and PTFE neck rings (standard in CR)

T = Titanium

X = Special version

Code for rubber parts

E = EPDM (ethylene propylene)

F = FXM (polytetrafluoroethylene and propylene)

K = FFKM (perfluoroelastomer)

P = NBR (nitrile)

T = PTFE (polytetrafluoroethylene)

V = FKM (fluorocarbon)

Code for shaft seal. See section 3.3 Code for shaft seal.

English (GB)

3.3 Code for shaft seal

The code for shaft seal always consists of four letters.

The following codes are used:

Example H Q Q E

Principal Grundfos type

designation for shaft seal 1

Material, rotating seal face 2

Material, stationary seat 3

Material, secondary seal 4

Position Code Description

A O-ring seal with fixed driver

B Rubber bellows seal

C O-ring seal with spring as seal driver

D O-ring seal, balanced

E Cartridge seal with O-ring

F Cartridge seal with rubber bellows

H Balanced cartridge seal with O-ring

K Type M as cartridge seal

M Shaft seal with metal bellows

O Double seal, back-to-back

P Double seal, tandem

RO-ring seal, type A, with reduced sliding

surfaces

X Special version

2 and 3

B Carbon, synthetic resin-impregnated

C Other types of carbon

S Chromium steel

HCemented tungsten carbide, embedded

(hybrid)

U Cemented tungsten carbide

Q Silicon carbide

V Aluminium oxide

X Other ceramics

EEPDM

FFXM

P NBR (nitrile rubber)

T PFTE

VFKM

K FFKM

English (GB)

4. Torques and lubricants

Pos. Designation Dimensions Torque [Nm] Lubricant

2d Hexagon socket head cap screw M10 x 50 65 Thread-Eze

9 Hexagon socket head cap screw M10 x 25 85 Thread-Eze

18 Air vent screw 5/20

23 Plug 1/2" 35 Thread-Eze

26d Nut M16 100 Thread-Eze

28 Hexagon head bolt M16 x 50 Thread-Eze

29 Nut M16 Thread-Eze

46c Hexagon socket head cap screw M10 x 30 40

48 Split cone nut M30 x 1 70

58a Hexagon socket head cap screw M10 x 25 62 Thread-Eze

English (GB)

5. Service tools

5.1 Special tools

ABCD

EFGH

IJKL

MNOP

QRS

Pos. Designation For pos. Description Part number

ATool for dismantling and assembly of

chamber stack, with pin

CR, CRN SF 32 ~ SV0003-3

SV0003

CR, CRN SF 45 ~ SV0003-4

CR, CRN SF 64 ~ SV0003-5

CR, CRN SF 90 ~ SV0003-2

B Tool for fixation of chamber stack

CR, CRN SF 32 96855938

CR, CRN SF 45 96856251

CR, CRN SF 64 96901146

CR, CRN SF 90 96936273

C Punch 47 SV0015

D Adjusting fork 105 985924

E Key for split cone nut 48 34 mm SV0004

F Lifting tool 51 97536386

GPuller for bottom bearing 47 SV0002

Hexagon socket head cap screw for puller M8 x 50 ID6595

H Hook spanner 49 SV0031

English (GB)

5.2 Standard tools

5.3 Torque tools

Pos. Designation For pos. Description Part number

I Tee key

3 mm SV0153

5 mm SV0124

6 mm SV0050

8 mm SV0051

J Hexagon head driver

5 mm SV0296

6 mm SV0297

8 mm SV0298

1/2" SV0094

5/8" SV0093

K Hexagon socket

13 mm SV0413

19 mm SV0419

24 mm SV0424

L Ring/open-end spanner

10 mm SV0083

13 mm SV0055

19 mm SV0054

24 mm SV0122

M Pin for torque wrench 14 9 x 12 mm SV0403

N Ratchet insert tool 9 x 12 mm SV0295

O Hexagon key

8 mm SV0032

5/8" SV0095

1/2" SV0096

P Pinch bar 105 SV5201

Q Screwdriver 9 mm SV0804

R Plastic hammer 2 No. 2 SV0349

Pos. Designation For pos. Description Part number

S Torque wrench

1-6 Nm SV0438

4-20 Nm SV0292

20-100 Nm SV0269

English (GB)

6. Dismantling and assembly

6.1 General information

Position numbers

Position numbers of parts (digits) refer to drawings in section

8. Exploded views. Position numbers of tools (letters) refer to

section 5. Service tools.

Before dismantling

• Disconnect the electricity supply to the motor.

• Close the isolating valves, if fitted, to avoid draining the

system.

• Remove the electric cable in accordance with local

regulations.

• Note the centre of gravity of the pump to prevent it from

overturning. This is especially important in the case of long

pumps.

Before assembly

Gaskets and O-rings should always be replaced when the pump

is overhauled.

• Clean and check all parts.

• Order the necessary service kits.

• Replace defective parts with new parts.

During assembly

Before assembly, clean and check all parts. Parts that are

defective should be replaced by new parts.

Lubricate and tighten screws and nuts to the torque stated.

See section 4. Torques and lubricants.

The Grundfos centrifugal pumps, types CR, CRN 32, 45, 64 and

90, are multi-stage in-line pumps.

Position numbers, see sections 7. Positions and 5. Service tools.

Order the necessary service kits.

Gaskets and O-rings should always be replaced when the pump

is overhauled.

6.2 Replacement of motor

6.2.1 Dismantling

Remove the screws (pos. 7a) and the coupling guards (pos. 7).

Keep the shaft seal in position on the shaft by inserting the

adjusting fork (pos. D) between the shaft seal (pos. 105) and the

seal carrier (pos. 58). See fig. 2.

Fig. 2 Shaft seal

Remove the screws (pos. 9) and the coupling (pos. 10a).

Remove the screws (pos. 28) and the nuts (pos. 29).

Carefully lift the motor free of the pump using lifting equipment

suitable for the motor size.

6.2.2 Assembly

Before assembly, clean all parts.

Fit the motor, and turn it to the required terminal box position.

Lubricate the screws (pos. 28) with Thread-Eze. Fit and cross-

tighten them to the torque stated. See section 4. Torques and

lubricants.

Before fitting the coupling, check that the adjusting fork (pos. D)

is still inserted between the shaft seal (pos. 105) and the seal

carrier (pos. 58).

Fit the coupling (pos. 10a) on the shaft so that the top of the

pump shaft is flush with the bottom of the coupling. See fig. 3.

Fig. 3 Coupling

Lubricate the hexagon socket head cap screws (pos. 9). Fit the

screws by hand and leave loose.

Check that the gaps either side of the coupling halves are

identical.

Tighten the hexagon socket head cap screws (pos. 9) two and

two (one side at a time). See section 4. Torques and lubricants.

Pull the adjusting fork (pos. D) free of the shaft, turn it and press it

on to one of the screws (pos. 58a).

Fit the coupling guards (pos. 7), and fasten them with the screws

(pos. 7a).

TM01 1927 0698

105

TM01 1930 0698

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