Grundfos A Series Betriebsanleitung

Service instructions

CRE 1, CRE 3 and CRE 5

Model A

50/60 Hz

1/3~

96547191 0407 GB 1 / 15

1. Type identification........................................................................................................................... 2

1.1 Nameplate ...........................................................................................................................................................2

1.2 Type key..............................................................................................................................................................3

2. Tightening torques and lubricants................................................................................................. 4

3. Service tools .................................................................................................................................... 5

3.1 Special tools ........................................................................................................................................................5

3.2 Standard tools......................................................................................................................................................6

3.3 Torque tools.........................................................................................................................................................6

4. Dismantling and assembly ............................................................................................................. 7

4.1 General................................................................................................................................................................7

4.2 Replacement of motor .........................................................................................................................................8

4.3 Replacement of shaft seal...................................................................................................................................9

4.4 Dismantling and assembly of pump main parts.................................................................................................10

4.5 Dismantling and assembly of chamber stack ....................................................................................................11

4.6 Dismantling and assembly of base and pump head..........................................................................................12

4.7 Checking and replacing parts............................................................................................................................13

5. Order of assembly for chambers and impellers ......................................................................... 14

5.1 CRE 1 and CRE 3..............................................................................................................................................14

5.2 CRE 5................................................................................................................................................................15

2 / 15

1. Type identification

This section shows the type key, the nameplate and the codes that can appear in the variant code.

Note: As codes can be combined, a code position may contain more than one letter.

1.1 Nameplate

TM02 1628 1701

Pos. Description Pos. Description

1 Type designation. See 1.2 Type key 10 Head at rated flow rate, 50 Hz

2 Model 11 P2, 60 Hz

3 Product number 12 Speed, 60 Hz

4 Place of production 13 Head against closed valve, 60 Hz

5 Production year and week 14 Rated flow rate, 60 Hz

6P2, 50 Hz 15 Head at rated flow rate, 60 Hz

7 Speed, 50 Hz 16 Maximum pressure and temperature

8 Head against closed valve, 50 Hz 17 Country of production

9 Rated flow rate, 50 Hz 18 Direction of rotation (CCW = counterclockwise)

Model

50Hz 60Hz

bar / C

m/h

96439820

-1

min

-1

min

kW kW

Type

max max

max

m/h

CRE5-10 AN-FGJ-A-E-HUB

A96459132P10117

1.50

2900

5.7

49.8

25/120

MADE IN DENMARK

1.50

2900

5.7

49.8

CCW

12345

17 1816

3 / 15

1.2 Type key

Example CRE 5 - 10 X- X- X- X- XXXX

Type range

Rated flow rate in m³/h

Number of stages

Code for pump version

A = Basic version

G = Pump for booster system

N = Pump with pressure sensor

U = NEMA version

Code for pipe connection

A = Oval flange

FGJ = DIN, ANSI and JIS flange

Code for pump materials

A = Pump head and base: Cast iron

Other wetted parts: Stainless steel

DIN W.-Nr. 1.4301

Code for rubber parts

E = EPDM

V = FKM

Code for shaft seal

HUBE/V = Balanced cartridge seal; rotating face: tungsten carbide;

stationary seat: resin-impregnated carbon;

O-rings, see code for rubber parts.

HUUE/V = Balanced cartridge seal; rotating face: tungsten carbide;

stationary seat: tungsten carbide;

O-rings, see code for rubber parts.

4 / 15

2. Tightening torques and lubricants

THREAD-EZE, part no. SV9997 (0.5 l).

Gardolube L 6034, part no. SV9995 (1 l).

Rocol 22, part no. RM2924 (1 kg).

Pos. Description Number Dim. Torque [Nm] Lubricant

7a Screw 4 M4 2

9 Hexagon socket head screw 4

M6 13

THREAD-EZEM8 31

M10 62

18 Air vent screw (spindle) 1 ½" (M8) 35 (3)

Soapy water23 Plug 1 ½" 35

25 Drain plug with bypass valve (spindle) 1 ½" (M10) 35 (5)

26 Staybolt 4 M12 THREAD-EZE

28 Hexagon head screw 4

M6 10

THREAD-EZEM8 12

M12 40

35 Hexagon head screw 4 M10 23 THREAD-EZE

36 Nut 4 M12 50 THREAD-EZE

37 O-ring 2 ø137.5 x 3.3 Rocol 22

47a Bearing ring See 5. Order of assembly for chambers and impellers Rocol 22

67 Lock nut 1 M8 18 Gardolube L 6034

105 Shaft seal 1 M28 35

113 Set screw 3 M5 2.5

5 / 15

3. Service tools

3.1 Special tools

TM02 0846 0401

Pos. Description For pos. Suppl. information Part no.

A Shaft holder for assembly SV0040

B Tubular box spanner for shaft seal 105 SV2007

C Puller 65 SV0239

D Circlip pliers (not used for CR) SV2014

E Tool for outer sleeve 55 V7170478

F Tool for corrugated spring 60 V7170227

G Tool for O-ring 37 V7170230

6 / 15

3.2 Standard tools

3.3 Torque tools

Pos. Description Bit no. For pos. Suppl. information Part no.

H Bit holder I-J 1/4" SV2011

I Bits kit

PZ2 7a 1/4"

SV2010

9-H

M6 - 5 mm 1/4"

6 M8 - 6 mm 1/4"

8 M10 - 8 mm 1/4"

J Hexagon bit 113-H-M M5 - 2.5 mm 1/4" SV2012

K Ring/open-end spanner

28 M6 - 10 mm SV0083

28-67 M8 - 13 mm SV0055

35 M10 - 17 mm SV0056

28-36 M12 - 19 mm SV0054

18-23-25 M16 - 24 mm SV0122

Pos. Description For pos. Suppl. information Part no.

L Torque wrench N-O

4-20 Nm 9 x 12 SV0292

20-100 Nm 9 x 12 SV0269

40-200 Nm 14 x 18 SV0400

M Torque screwdriver J 1-6 Nm 1/4" SV0438

N Ratchet insert tool L-O-P 9 x 12 -> 1/2" SV0295

O Ring insert tool

28-L M6 - 10 mm 9 x 12 SV0310

28-L M8 - 13 mm 9 x 12 SV0294

28-L M10 - 17 mm 9 x 12 SV0270

36-L M12 - 19 mm 9 x 12 SV0271

18-23-25-L M16 - 24 mm 9 x 12 SV0524

P Hexagon socket driver 9-N

M6 - 5 mm ½" x ½" SV0296

M8 - 6 mm ½" x ½" SV0297

M10 - 8 mm ½" x ½" SV0298

Q Socket spanner, purpose-ground 67-L M8 - 13 mm 9 x 12 SV2013

7 / 15

4. Dismantling and assembly

4.1 General

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 exploded views, sectional drawings and parts lists; position numbers of tools

(letters) refer to 3. Service tools.

4.1.1 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.

• Note the centre of gravity of the pump to prevent it from overturning. This is especially important in the case of long

pumps.

4.1.2 Before assembly

• Clean and check all parts.

• Order the necessary service kits.

• Replace defective parts by new parts.

• Gaskets and O-rings should always be replaced when the pump is overhauled.

4.1.3 During assembly

• Lubricate and tighten the screws and nuts to correct torque as stated in 2. Tightening torques and lubricants.

4.1.4 After assembly

• The pump should be tested according to test specification 96446769.

8 / 15

4.2 Replacement of motor

4.2.1 Dismantling

1. Disconnect the pressure sensor, if fitted, from the terminal box of the motor. See fig. 1.

Fig. 1

2. Slacken and remove the screws (pos. 7a) together with the coupling guard (pos. 7)

3. Slacken and remove the screws (pos. 9) together with the coupling halves (pos. 10a) and the shaft pin

(pos. 10).

4. Slacken and remove the screws (pos. 28).

5. Lift the motor off the pump head (pos. 2).

4.2.2 Assembly

1. Fit the motor to the pump head.

2. Fit the screws (pos. 28) and tighten diagonally to the correct torque.

3. Fit the shaft pin (pos. 10) into the shaft pin hole.

4. Fit the coupling halves (pos. 10a) on the shaft and fit the screws (pos. 9). Tighten the screws and leave loose.

Check that the gaps either side of the coupling halves are equal.

5. Tighten the screws (pos. 9) diagonally to the correct torque.

Check that the gaps either side of the coupling halves are equal. See fig. 2.

Fig. 2

6. Fit the coupling guard (pos. 7) and the screws (pos. 7a).

7. Connect the pressure sensor, if any, to the terminal box of the motor. See fig. 1.

TM02 1629 1701

Black

Brown Brown (8)

Black (7)

MGE 71, MGE 80 MGE 90, MGE 100, MGE 112, MGE 132

9 / 15

4.3 Replacement of shaft seal

4.3.1 Dismantling

1. Remove the motor and the coupling. See 4.2.1 Dismantling.

2. Slacken the three screws (pos. 113) by approx. a ¼ of a turn so that the shaft seal is just free of the shaft.

3. Slacken the shaft seal (pos. 105) using the box spanner (pos. B) until the thread is completely free of the

pump head.

4. Pull the shaft seal off the shaft.

4.3.2 Assembly

1. If necessary, clean and smooth the shaft end using the holder with emery cloth supplied with the shaft seal kit.

2. Moisten the shaft end with soapy water.

3. Place the shaft seal in the box spanner (pos. B) and press it down on the shaft.

4. Screw the shaft seal into the pump head and tighten it to the correct torque.

5. Fit the shaft pin (pos. 10) into the shaft pin hole and fit the coupling halves (pos. 10a) on the shaft. Fit the

screws (pos. 9), tighten and leave loose.

Check that the gaps either side of the coupling halves are equal. See fig. 2.

6. Fit the motor to the pump head.

7. Fit the screws (pos. 28) and tighten diagonally to the correct torque.

8. Insert a suitable screwdriver between the bottom of the coupling and the shaft seal, and raise the shaft/the

coupling against stop. See fig. 3.

Fig. 3

9. Lower the shaft/the coupling to half that height. See fig. 3.

10.Hold the shaft/the coupling in this position and tighten the four screws in the coupling (pos. 9) to the correct

torque.

Check that the gaps either side of the coupling halves are equal. See fig. 2.

11.Tighten the three screws (pos. 113) to the correct torque.

12.Fit the coupling guard (pos. 7) and the screws (pos. 7a).

13.Connect the pressure sensor, if any, to the terminal box of the motor. See fig. 1.

TM02 0462 4600

0.5x

10 / 15

4.4 Dismantling and assembly of pump main parts

4.4.1 Dismantling

1. Remove the shaft seal. See 4.3.1 Dismantling.

2. Remove the pressure sensor, if fitted, from the pump head (pos. 2).

3. Slacken and remove the screws (pos. 36) together with the washers (pos. 66a).

4. Loosen the pump head (pos. 2) with a light blow on the edge and lift it free of the staybolts (pos. 26). The top

guide vanes/discharge part (pos. 50a) may stick to the pump head.

5. Loosen the top guide vanes/discharge part (pos. 50a) with a light blow of a rubber mallet if it was not removed

with the pump head.

6. Remove the outer sleeve (pos. 55).

7. Lift the chamber stack off the base. If the bottom chamber (pos. 5a) is removed with the chamber stack,

loosen it from the chamber stack; otherwise loosen it from the base (pos. 6).

4.4.2 Assembly

1. Fit the chamber stack in the base. The smooth shaft end must be upwards.

2. Fit the outer sleeve (pos. 55) in the base and press it home in the base using the tool (pos. E).

The O-ring (pos. 37) must be lubricated. See 2. Tightening torques and lubricants.

3. Press the top guide vanes/discharge part (pos. 50) into the recess of the top chamber.

4. Fit the pump head on the pump with the air vent screw (pos. 18) in the direction required.

The O-ring (pos. 37) must be lubricated. See 2. Tightening torques and lubricants.

5. Lubricate the threads of the staybolts. See 2. Tightening torques and lubricants.

6. Fit the washers (pos. 66a) and the nuts (pos. 36).

7. Tighten the nuts (pos. 36) diagonally to the correct torque.

8. Fit the pressure sensor, if any, to the pump head (pos. 2).

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