Grundfos CM series Operating instructions

GRUNDFOS INSTRUCTIONS

CM, CME

Service instructions

English (GB)

English (GB) Service instructions

Original service instructions.

CONTENTS

Page

1. Symbols used in this document

1. Symbols used in this document 3

2. Type identification 4

2.1 Nameplate 4

2.2 Type key 5

3. Tightening torques and lubricants 6

4. Service tools 7

4.1 Standard tools 7

4.2 Torque tools 7

5. Dismantling and assembly 8

5.1 General information 8

5.2 CM 1, 3, 5, cast iron 8

5.3 CM 1, 3, 5, stainless steel 9

5.4 CM 10, 15, 25, cast iron 10

5.5 CM 10, 15, 25, stainless steel 12

5.6 MG 71 and MG 80 motors 13

5.7 MG 90, MG 100, MG 112 and MG 132 motors 13

5.8 Checking and replacing impellers and chambers 14

6. Fault finding 15

7. Drawings 16

7.1 CM 1, 3, 5 16

7.2 CM 10, 15, 25 18

8. Order of assembly for chambers and impellers 20

8.1 Key for CM 1, 3, 5 20

8.2 CM 1, 3, 5, cast iron 20

8.3 CM 1, 3, 5, stainless steel 20

8.4 Key for CM 10, 15, 25 21

8.5 CM 10, 15, 25, cast iron 21

8.6 CM 10, 15, 25, stainless steel 22

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.

English (GB)

2. Type identification

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

that can appear in the variant code.

2.1 Nameplate

Fig. 1 Pump nameplate

Fig. 2 Motor nameplate

The pump and motor nameplates are positioned on the motor fan

cover or terminal box.

The data and information on the pump nameplate are described

in the table below.

The data and information on the motor nameplate are described

in the table below.

Note

As codes can be combined, a code position may

contain more than one code (letter).

TM04 0355 0908

Model

IP T

Type P

max

liq,max

bar MPa

PSI

nom

max

m³/h GPM

Env

PSI

nom

max

m³/h GPM

PSI

°C °F

50 Hz

95120839

60 Hz

3455

10 10

11 11

12 12

Amb

°C °F

Insulation class

TM04 0356 0908

Imax

~/V

uF / V

95120836

I1/1

Imax

~/V

I1/1

Capacitor

HP kW HP

uF / V

Capacitor

50 Hz 60 Hz

112

6 6

Pos. Description

1 Pump type

2 Pump model

3Environmental rating for enclosures based on NEMA

type designations

4 Enclosure class

5 Maximum ambient temperature [°C] / [°F]

6 Maximum system pressure [bar] / [psi] / [MPa]

7 Maximum liquid temperature [°C] / [°F]

8 Insulation class

9 Motor protection

10 Rated flow [m3/h] / [GPM]

11 Head at rated flow [m] / [psi]

12 Maximum head [m] / [psi]

Pos. Description

1 Number of phases

2 Voltage [V]

3 Maximum current [A]

4 Rated current [A]

5 Power output [kW] / [hp]

6Single-phase pumps only:

Capacitor size [F] and voltage [V]

English (GB)

2.2 Type key

CM, CME

Example CME 10 - 8 A - R - A - E - A V B E X - X - X - X

Type range Sensor

CM Centrifugal Modular Sensor designation

CME: CM with integrated frequency

converter Mains plug

Rated flow rate A: Cable glands

Rated flow rate at 50 Hz [m3/h] B: Harting plug

Number of impellers C: With cable

Pump version Motor information

A: Basic version A: Standard motor (IP55)

B: Oversize motor (one flange size larger) B: Phase-insulated motor for use with

frequency converter

E: Pumps with certificates and other approvals C: IP54

HS: High-pressure pump with high-speed MGE motor D: Pt100 in stator

I: Altered pressure class E: Angular contact bearing

J: Pump with a different maximum speed F: Motor heater

M: Magnet-driven pump G: Three-phase motor with overload

protection

N: CME pump with sensor (see code for "Sensor") H: Single-phase motor with no overload

protection

P: Undersize motor (one flange size smaller)

T: Oversize motor (two flange sizes larger) Supply voltage

V: CME pump for Multi-E A: 1 x 220 V, 60 Hz

X: Special pump B: 1 x 115/230 V, 60 Hz

C: 1 x 220-240 V, 50 Hz

Pipe connection D: 1 x 127 V, 60 Hz

C: Tri-Clamp®E: 3 x 208-230/440-480 V, 60 Hz

F: DIN flange F: 3 x 220-240/380-415 V, 50 Hz

G: ANSI flange G: 3 x 200/346 V, 50 Hz; 200-220/346-380 V,

60 Hz

J: JIS flange H: 3 x 575 V, 60 Hz

P: PJE coupling I: 3 x 400 V, 50/60 Hz

R: Whitworth thread Rp (ISO 7/1) J: 3 x 380-415 V, 50 Hz; 440-480 V, 60 Hz

S: Internal NPT thread K: 1 x 220-240 V, MGE motor

L: 3 x 380-480 V, MGE motor

Materials in contact with pumped liquid M: 1 x 208-230 V, MLE motor

Inlet and discharge parts EN-GJL-200 N: 3 x 460-480 V, MLE motor

Pump shaft EN 1.4057/AISI 431 O: 3 x 220-240/380-415 V, 50 Hz

3 x 220-255/380-440 V, 60 Hz

Impellers/chambers EN 1.4301/AISI 304

Sleeve EN 1.4401/AISI 316 Material of secondary seal

Pump shaft EN 1.4401/AISI 316 E: EPDM (ethylene propylene)

Impellers/chambers EN 1.4401/AISI 316 K: FFKM (perfluor)

Sleeve EN 1.4301/AISI 304 V: FKM (fluor)

Pump shaft EN 1.4301/AISI 304

Impellers/chambers EN 1.4301/AISI 304 Material of stationary shaft seal part

X: Special version B: Carbon, synthetic resin-impregnated

Q: Silicon carbide (SIC)

Rubber parts in pump (excl. neck ring and shaft seal)

E: EPDM (ethylene propylene) Material of rotating seal face

K: FFKM (perfluor) Q: Silicon carbide (SIC)

V: FKM (fluor) V: Aluminium oxide (AI203)

Note: Gaskets between chambers of cast-iron versions are made of

Tesnit BA-U. Shaft seal type designation

A: O-ring seal with fixed driver

Note

The type key cannot be used for ordering, as not all combinations are possible.

English (GB)

3. Tightening torques and lubricants

THREAD-EZE, part number 00SV9997 (0.5 l).

Rocol 22, part number 00RM2924 (1 kg).

Castrol LMX grease, part number 00RM4311.

Silicone oil, 350 cSt, food grade 00SV0862 (1 l).

Pos. Designation Quantity Dimensions Torque [Nm] Lubricant

2b Screw, CM 1, 3, 5 2 M8 x 40 16 - 18 THREAD-EZE

Hexagon socket head cap screw CM 10, 15, 25 2 M8 x 80 16 - 18 THREAD-EZE

11 O-ring 2 ∅18.5 x 2.0 - -

25 Plug 2 - 10 - 12 -

Staybolt, CM 1, 3, 5, cast iron 4 M6 12 - 14 -

Staybolt, CM 1, 3, 5, stainless steel 4 M8 12 - 14 -

Staybolt, CM 10, 15, 25, cast iron 4 M8 25-27 THREAD-EZE

Staybolt, CM 10, 15, 25, stainless steel 4 M8 20-22 -

28g Screw 4 M6 x 14 8 - 10 THREAD-EZE

31 O-ring, CM 1, 3, 5 1 ∅114.0 x 3.90 - Rocol 22

O-ring, CM 10, 15, 25 1 ∅153.2 x 4.70 - Rocol 22

67 Lock nut 1 M8 16 - 18 -

102 O-ring 1 ∅17.86 x 2.62 - V7140084

103 Seal faces 1 - - Silicone oil, 350 cSt,

food grade

107 O-ring 1 ∅11.5 x 3.18 - Rocol 22

152 Screw 2 M4 x 8 2.7 - 3.3 -

4 M5 x 12 3.5 - 4 -

155 Bearing cover plate 1 - - Rocol 22

157a

Gasket, MG 71, MG 80 1 ∅114.8 / 121.2 x 0.25 - -

Gasket, MG 90 2 ∅141.2 / 145.5 - -

Gasket, MG 100 - - - -

158a O-ring 1 ∅35.4 x 1.97 - Rocol 22

159

O-ring, MG 71, MG 80 1 ∅32 x 2

- Rocol 22O-ring, MG 90, MG 100 1 ∅52 x 3.0

O-ring, MG 112, 132 1 ∅62 x 3.0

159a Seal ring 1 - - Castrol LMX grease

181

Screw, MG 71, MG 80 4 M6 x 16 5 - 8

THREAD-EZE

Staybolt, MG 90 4 M5 x 220

4.5 - 6

Staybolt, MG 90L 4 M5 x 260

Staybolt, MG 100 4 M5 x 270

Staybolt, MG 112 4 M6 x 288

English (GB)

4. Service tools

4.1 Standard tools

4.2 Torque tools

ABCD

EFGH

IJKL

Pos. Designation For pos. Further information Part number

AScrewdriver 103, 156 - SV0803

BCross-head screwdriver 181 Ph2 x 100 SV0279

CTorx screwdriver J TX30 x 115 mm SV0335

DRing/open-end spanner 64c 15 mm -

67 13 mm SV0055

EHexagon key 26 5 mm -

6 mm SV0196

FPuller for bearing 153, 154 - -

GPlastic hammer 156 - SV0349

HRatchet handle 156 - 96777072

IHexagon head driver 26 M6 - 5 mm SV0296

M8 - 6 mm SV0297

181 M5 - 4 mm -

JBits kit 28g, 152, 181 - SV2010

Pos. Designation For pos. Further information Part number

KTorque screwdriver J 1-6 Nm SV0438

LRing insert tool N 13 mm - 9 x 12 mm SV0294

MRatchet insert tool I 9 x 12 mm - 1/2" SV0295

NTorque wrench L, M 9 x 12 mm - 4-20 Nm SV2092

9 x12 mm - 20-100 Nm SV0269

English (GB)

5. Dismantling and assembly

5.1 General information

If it is necessary to dismantle the pump, either because it is

choked or damaged, please follow the instructions in the following

sections.

Position numbers of parts (digits) refer to section 7. Drawings;

position numbers of tools (letters) refer to section 4. Service

tools.

Before dismantling the pump

• 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.

Before assembly

• Clean and check all parts.

• Replace defective parts by new parts.

• Order the necessary service kits.

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

pump is overhauled.

During assembly

• Lubricate and tighten screws and nuts to correct torque.

See section 3. Tightening torques and lubricants.

5.2 CM 1, 3, 5, cast iron

5.2.1 Dismantling

1. Remove staybolts (pos. 26).

2. Remove inlet part (pos. 6).

3. Remove gasket (pos. 139b) and chamber (pos. 4e).

4. Hold clamp (pos. 64c), and remove nut (pos. 67).

5. Remove lock washers (pos. 66) and clamp (pos. 64c).

6. Remove impeller (pos. 49).

7. Remove bearing ring (pos. 47a) and short spacing pipe

(pos. 64a).

8. Remove chamber for bearing (pos. 4a), gasket (pos. 139b),

impeller (pos. 49) and spacing pipe (pos. 64).

9. Continue the dismantling until shaft seal (pos. 105).

10.Remove shaft seal (pos. 105). See fig. 3.

Fig. 3 Exploded view of shaft seal

5.2.2 Assembly

1. Fit O-ring (pos. 102) on the stationary shaft seal part.

See fig. 4. For correct lubricant, see section 3. Tightening

torques and lubricants.

Fig. 4 Fitting the O-ring on the stationary shaft seal part

2. Press the stationary shaft seal part home. See fig. 5.

Fig. 5 Fitting the stationary shaft seal part (only SiC/SiC)

3. Fit the rotating shaft seal part (pos. 104) so that the seal face

touches the stationary part.

4. Fit O-ring (pos. 107) into the rotating shaft seal part

(pos. 104). For correct lubricant, see section 3. Tightening

torques and lubricants.

5. Fit retainer (pos. 111) and stop ring (pos. 111a). See fig. 6.

Fig. 6 Fitting the stop ring

Note

Step 7 applies only to pumps with eight stages.

Note

Step 8 applies only to pumps with eight stages.

TM04 4327 1209

Note

Dismantling of MG 71 and MG 80,

see section 5.6.1.

Dismantling of MG 90 and MG 100,

see section 5.7.1.

Note

It is advisable always to replace wear rings

(pos. 45) and wear ring retainers (pos. 65).

See section 5.8.

Note

Assembly of MG 71 and MG 80, see section 5.6.2.

Assembly of MG 90 and MG 100, see section 5.7.2.

TM04 4322 1209

Warning

Do not touch the seal face.

TM04 4436 1209

Warning

Do not touch the seal face.

TM04 4325 1209

English (GB)

6. Fit spring (pos. 108) and driver (pos. 112). See fig. 7.

Fig. 7 Fitting the spring and driver

7. Fit impeller (pos. 49), spacing pipe (pos. 64), gasket

(pos. 139b) and chamber plate (pos. 4f).

8. Continue the assembly until chamber for bearing (pos. 4a).

9. Fit chamber for bearing (pos. 4a), short spacing pipe

(pos. 64a), gasket (pos. 139b) and bearing ring (pos. 47a).

See section 8. Order of assembly for chambers and impellers.

10.Fit impeller (pos. 49), clamp (pos. 64c), washers (pos. 66) and

nut (pos. 67). See fig. 8.

Fig. 8 Correct fitting of washers

11.Hold clamp (pos. 64c), and tighten nut (pos. 67).

See section 3. Tightening torques and lubricants.

12.Fit chamber (pos. 4e) and gasket (pos. 139b).

13.Fit inlet part (pos. 6).

14.Fit and cross-tighten staybolts (pos. 26).

See section 3. Tightening torques and lubricants.

5.3 CM 1, 3, 5, stainless steel

5.3.1 Dismantling

1. Remove staybolts (pos. 26).

2. Remove clamping flange (pos. 6a) and sleeve (pos. 16).

3. Remove chamber (pos. 4e).

4. Hold clamp (pos. 64c), and remove nut (pos. 67).

5. Remove lock washers (pos. 66) and clamp (pos. 64c).

6. Remove impeller (pos. 49).

7. Remove bearing ring (pos. 47a) and short spacing pipe

(pos. 64a).

8. Remove chamber for bearing (pos. 4a), impeller (pos. 49) and

spacing pipe (pos. 64).

9. Continue the dismantling until shaft seal (pos. 105).

10.Remove shaft seal (pos. 105). See fig. 9.

Fig. 9 Exploded view of shaft seal

11.Remove O-ring (pos. 31) and cover plate (pos. 32).

5.3.2 Assembly

1. Fit cover plate (pos. 32) and O-ring (pos. 31). Lubricate the

O-ring. See section 3. Tightening torques and lubricants.

2. Fit O-ring (pos. 102) on the stationary shaft seal part.

See fig. 10. See section 3. Tightening torques and lubricants.

Fig. 10 Fitting the O-ring on the stationary shaft seal part

TM04 4326 1209

Note

Step 8 applies only to pumps with eight stages.

Note

Step 9 applies only to pumps with eight stages.

TM02 1057 0501

Note

Step 7 applies only to pumps with eight or more

stages.

Note

Step 8 applies only to pumps with eight or more

stages.

TM04 4327 1909

Note

Dismantling of MG 71 and MG 80,

see section 5.6.1.

Dismantling of MG 90 and MG 100,

see section 5.7.1.

Note

It is advisable always to replace wear rings

(pos. 45) and wear ring retainers (pos. 65).

See section 5.8.

Note

Assembly of MG 71 and MG 80, see section 5.6.2.

Assembly of MG 90 and MG 100,

see section 5.7.2.

TM04 4322 1909

English (GB)

3. Press the stationary shaft seal part home. See fig. 11.

Fig. 11 Fitting the stationary shaft seal part (only SiC/SiC)

4. Fit the rotating shaft seal part (pos. 104) so that the seal face

touches the stationary part.

5. Fit O-ring (pos. 107) into the rotating shaft seal part

(pos. 104). See section 3. Tightening torques and lubricants.

6. Fit retainer (pos. 111) and stop ring (pos. 111a). See fig. 12.

Fig. 12 Fitting the stop ring

7. Fit spring (pos. 108) and driver (pos. 112). See fig. 13.

Fig. 13 Fitting the spring and driver

8. Fit impeller (pos. 49), chamber with holes (pos. 4d) and

spacing pipe (pos. 64).

9. Fit impeller (pos. 49), chamber (pos. 4) and spacing pipe

(pos. 64).

10.Fit impeller (pos. 49), chamber (pos. 4a), short spacing pipe

(pos. 64a) and bearing ring (pos. 47a). See section 8. Order of

assembly for chambers and impellers.

11.Fit impeller (pos. 49), clamp (pos. 64c), washers (pos. 66) and

nut (pos. 67). See fig. 14.

Fig. 14 Correct fitting of washers

12.Hold clamp (pos. 64c), and tighten nut (pos. 67).

See section 3. Tightening torques and lubricants.

13.Fit chamber (pos. 4e), sleeve (pos. 16) and clamping flange

(pos. 6a).

14.Fit and cross-tighten staybolts (pos. 26).

See section 3. Tightening torques and lubricants.

5.4 CM 10, 15, 25, cast iron

5.4.1 Dismantling

1. Remove staybolts (pos. 26).

2. Remove inlet part (pos. 6) and gasket (pos. 139b).

3. Hold clamp (pos. 64c), and remove nut (pos. 67).

4. Remove lock washers (pos. 66) and clamp (pos. 64c).

5. Remove impeller (pos. 49) and spacing pipe (pos. 64).

6. Remove chamber (pos. 4).

7. Continue the dismantling until shaft seal (pos. 105).

8. Remove shaft seal (pos. 105). See fig. 15.

Fig. 15 Exploded view of shaft seal

9. Loosen and remove screws (pos. 2b) and discharge part

(pos. 2).

Warning

Do not touch the seal face.

TM04 4435 1909

Warning

Do not touch the seal face.

TM04 4325 1909TM04 4326 1909

Note

Step 10 applies only to pumps with eight or more

stages.

TM02 1057 0501

Caution

Do not forget to fit the last chamber (pos. 4e), as

it is possible to assemble the pump without the

last chamber.

TM04 4327 1209

Note

Dismantling of MG 71 and MG 80,

see section 5.6.1.

Dismantling of MG 90, MG 100, MG 112 and

MG 132, see section 5.7.1.

Note

It is advisable always to replace wear rings

(pos. 45) and wear ring retainers (pos. 65).

See section 5.8.

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