Grundfos CM Installation And Operating Instructions Manual

CM

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

Installation and operating instructions

http://net.grundfos.com/qr/i/95121197

2

3

Table of contents

CM

English (GB)

Installation and operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

 (BG)

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

eština (CZ)

Montážní a provozní návod. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Deutsch (DE)

Montage- und Betriebsanleitung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Dansk (DK)

Monterings- og driftsinstruktion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Eesti (EE)

Paigaldus- ja kasutusjuhend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Español (ES)

Instrucciones de instalación y funcionamiento . . . . . . . . . . . . . . . . . . . . . . . . . 79

Suomi (FI)

Asennus- ja käyttöohjeet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Français (FR)

Notice d'installation et de fonctionnement. . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

 (GR)

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Hrvatski (HR)

Montažne i pogonske upute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Magyar (HU)

Telepítési és üzemeltetési utasítás. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Italiano (IT)

Istruzioni di installazione e funzionamento . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Lietuviškai (LT)

rengimo ir naudojimo instrukcija . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Latviešu (LV)

Uzstdšanas un ekspluatcijas instrukcija. . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Nederlands (NL)

Installatie- en bedieningsinstructies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Polski (PL)

Instrukcja montau i eksploatacji . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

Português (PT)

Instruções de instalação e funcionamento . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Table of contents

4

CM

Român (RO)

Instruciuni de instalare i utilizare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229

Srpski (RS)

Uputstvo za instalaciju i rad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

Svenska (SE)

Monterings- och driftsinstruktion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

Slovensko (SI)

Navodila za montažo in obratovanje. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266

Slovenina (SK)

Návod na montáž a prevádzku . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

Türkçe (TR)

Montaj ve kullanım kılavuzu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291

 (UA)

     . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304

Bahasa Indonesia (ID)

Petunjuk pengoperasian dan pemasangan . . . . . . . . . . . . . . . . . . . . . . . . . . 355

 (AR)

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379

Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380

Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385

English (GB)

5

English (GB) Installation and operating instructions

Original installation and operating instructions

CONTENTS

Page

1. Symbols used in this document

5

2. Introduction

6

3. Delivery and handling

6

4. Applications

6

5. Identification

6

5.1 Nameplates for pump

6

5.2 Nameplate for motor

7

6. Mechanical installation

7

6.1 Installation of pump

7

6.2 Pipework

8

6.3 Alternative connection positions

9

6.4 Terminal box positions

9

6.5 Avoiding condensation in the motor

9

7. Electrical installation

10

7.1 Power supply cable

10

7.2 Motor protection

10

7.3 Electrical connection

10

7.4 Frequency converter operation

10

8. Startup

11

8.1 Non-self-priming pumps

11

8.2 Self-priming pumps

11

8.3 Checking the direction of rotation

12

9. Maintenance

12

9.1 Frost protection

12

9.2 Cleaning

12

10. Service

13

11. Technical data

13

11.1 Enclosure class

13

11.2 Sound pressure level

13

11.3 Ambient temperature

13

11.4 Maximum system pressure and

permissible liquid temperature

14

11.5 Minimum inlet pressure

14

11.6 Maximum inlet pressure

14

12. Fault finding

15

13. Further product information

16

13.1 Service documentation

16

14. Disposal

16

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

The use of this product requires

experience with and knowledge of the

product.

Persons with reduced physical, sensory or

mental capabilities must not use this

product, unless they are under supervision

or have been instructed in the use of the

product by a person responsible for their

safety.

Children must not use or play with this

product.

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.

Warning

The surface of the product may be so hot

that it may cause burns or 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)

6

2. Introduction

This manual describes the installation and operation

of Grundfos CM pumps.

3. Delivery and handling

The pumps are delivered from factory in a packaging

specially designed for manual transport or transport

by forklift truck or a similar vehicle.

4. Applications

The pumps are horizontal, multistage centrifugal

pumps designed for pumping of clean, thin and

non-flammable liquids, not containing solid particles

or fibres that may attack the pump mechanically or

chemically.

5. Identification

5.1 Nameplates for pump

The pump name plates are positioned on the motor

fan cover or terminal box.

5.1.1 Nameplate with pump data

The data and information on the pump nameplate

are described in the table below. See the nameplate

in fig. 1 on page 380.

5.1.2 Nameplate with approval marks

The data and information on the pump nameplate

are described in the table below. See the nameplate

in fig. 2 on page 380.

Note

In order to ensure safe transport, we

recommend that you transport the pumps

with suitable lifting tools.

Warning

The pump must not be used for the

transfer of flammable or toxic liquids.

Pos. Description

1 Pump type

2 Pump model

3 Maximum ambient temperature

4 Temperature class

5 Minimum efficiency index

6 Maximum system pressure

7 Maximum liquid temperature

8 Hydraulic efficiency at best efficiency point

9 Insulation class

10 Motor protection

11 Rated flow

12 Head at rated flow

13 Maximum head

Pos. Description

1CE mark

2 EAC mark

3 PSE mark

4 cULus mark

5UL mark

6 cURus mark

7 Company name and address

8 Country of manufacture

English (GB)

7

5.2 Nameplate for motor

The motor name plate is positioned on the motor

cooling fins.

The data and information on the motor nameplate

are described in the table below. See the nameplate

in fig. 3 on page 380.

6. Mechanical installation

Before installing the pump, check that the pump type

and parts are as ordered.

6.1 Installation of pump

Install the pump on a plane surface using the

mounting holes in the motor base plate and a

minimum of four bolts. Tighten each of the four bolts

to a torque of 10 Nm.

Install the pump so that air locks are avoided in the

pump housing and pipework.

Figure 1 and the table below show the permissible

pump positions.

Fig. 1 Pump positions

● Mounting in this position is allowed.

Install the pump so that inspection, maintenance and

service can easily be performed.

Install the pump in a well-ventilated location.

Pos. Description

1 Capacitor size and voltage

2 50 Hz motor efficiency at rated work point

3 50 Hz power factor

4 50 Hz output power in kW

5 Frequency

6 Number of phases

7 50 Hz output power in hp

8 50 Hz maximum current

9 50 Hz full-load current

10 50 Hz rated voltage

11 Motor type

12 50 Hz rated speed

13 Frequency

14 60 Hz output power in kW

15 NEMA enclosure class

16 60 Hz output power in hp

17 60 Hz power factor

18 60 Hz motor efficiency at rated work point

19 Part number

20 Factory code

21 Production date (year and week)

22 Country of origin

23 60 Hz rated voltage

24 60 Hz full-load current

25 60 Hz maximum current

26 60 Hz rated speed

27 IEC duty cycle

28 Number of poles

29 IEC enclosure class

30 Insulation class

31 NEMA enclosure type

32 Motor duty class

33 Maximum ambient temperature

34 NEMA locked-rotor code

35 NEMA design class

37 CC122B mark

38 CE mark

39 cURus mark

Warning

When pumping hot or cold liquids, make

sure that persons cannot accidentally

come into contact with hot or cold

surfaces.

TM05 6389 4712

Pump

position

Non-self-priming

pumps

Self-priming

pumps

1- -

2  -

3  -

4 

5- -

6 

Up

Floor

English (GB)

8

6.2 Pipework

We recommend that you fit isolating valves on either

side of the pump. It is thus not necessary to drain the

system if the pump needs service.

If the pump is installed above the liquid level, a

non-return valve must be fitted in the suction pipe

below the liquid level. See fig. 4.

If the pump is to be used for pumping rainwater or

well water, we recommend that you fit a filter to the

inlet of the suction pipe.

The pump must not be stressed by the pipework.

Install the pipes according to the design

requirements given in EN ISO 13480-3:2012.

Tolerances must comply with EN ISO 13920:1996,

class C.

The pipework must be correctly sized taking due

account of the pump inlet pressure.

Install the pipes so that air locks are avoided,

especially on the suction side of the pump. See fig.

2.

Fig. 2 Pipework

6.2.1 Pipe connection (non-self-priming pumps)

Fig. 3 Suction and discharge ports

6.2.2 Pipe connection (self-priming pumps)

The pump must be installed correctly to ensure that it

can self-prime.

Take the following precautions:

See fig. 4.

• The minimum height from the centre of the

suction port to the first tapping point (H

1

) must be

observed.

If a pressure manager is installed in the system,

H

1

is the height from the centre of the pump

suction port to the pressure manager.

Minimum heights appear from the table below.

• The suction pipe must be at least 0.5 metres

below the liquid level (H

3

).

We recommend that you install a filling plug in the

discharge pipe. This facilitates liquid filling before

startup. See fig. 4, pos. A.

Note

Self-priming pumps:

We recommend an opening pressure of

the non-return valve which is lower than

0.05 bar. Otherwise the additional

resistance will reduce the suction

capability of the pump.

TM04 0338 0608

Caution

Take care not to damage the pump when

connecting the suction and discharge

pipes.

Torque: 50-60 Nm. The stated torque must

not be exceeded.

TM04 0358 1008

Note

For optimum suction capability, the pump

must be located near the well or tank to

ensure that the suction pipe is as short as

possible. This will reduce the self-priming

time, especially in the case of a high

suction lift.

Discharge port

Suction port

English (GB)

9

Fig. 4 Recommended pipework for a

self-priming pump

6.3 Alternative connection positions

The pump is available with various connection

positions on special request. See fig. 5.

Fig. 5 Alternative connection positions

6.4 Terminal box positions

The pump is available with various terminal box

positions on special request. See fig. 6.

Fig. 6 Terminal box positions

6.5 Avoiding condensation in the motor

If the liquid temperature falls below the ambient

temperature, condensation may form in the motor

during standstill. Condensation can occur in moist

surroundings or areas with high humidity.

In such cases, use a motor suitable for condensing

environments such as an IPX5 motor available from

Grundfos.

Alternatively, open the bottom drain hole in the motor

flange by removing the plug. See fig. 7. This reduces

the motor enclosure class to IPX5.

Fig. 7 Motor drain plug

The open drain hole helps prevent condensation in

the motor as it makes the motor self-venting and

allows water and humid air to escape.

When you install the pump outdoors, provide the

motor with a cover to avoid condensation. See fig. 8.

Fig. 8 Examples of covers (not supplied by

Grundfos)

TM05 8415 2313

Suction lift

(H

2

)

[m]

Minimum height

(H

1

)

[m]

40.2

50.35

60.5

70.6

80.7

TM03 8709 1008

Note

Self-priming pumps:

These pumps are only available with the

discharge port pointing upwards, i.e. in the

same direction as the filling hole.

H

3

H

2

H

1

H

1

A

TM04 0357 1008TM06 3860 1015

Pos. Description

1 Motor drain plug

TM05 3496 3512

1

English (GB)

10

7. Electrical installation

Carry out the electrical connection according to local

regulations.

Check that the supply voltage and frequency

correspond to the values stated on the nameplate.

7.1 Power supply cable

In order to comply with the EN 60335-1 standard, the

power supply cable must as minimum be rated for an

operating temperature of 105 °C (221 °F).

7.2 Motor protection

Single-phase motors, 1 x 115 / 230 V, 60 Hz

These motors do not incorporate motor protection

and must be connected to a motor-protective circuit

breaker which can be manually reset.

Set the motor-protective circuit breaker to maximum

1.15 x I

1/1

.

Other single-phase motors

These motors have built-in current- and

temperature-dependent motor protection in

accordance with IEC 60034-11 and require no further

motor protection. The motor protection is of the TP

211 type which reacts to both slow- and quick-rising

temperatures. The motor protection is automatically

reset.

Three-phase motors up to 3 kW

These motors must be connected to a

motor-protective circuit breaker which can be

manually reset.

Set the motor-protective circuit breaker to maximum

1.15 times full-load current.

Three-phase motors of 3 kW and up

These motors have built-in thermistors (PTC)*. The

thermistors are designed according to DIN 44082.

The motor protection is of the TP 211 type which

reacts to both slow- and quick-rising temperatures.

* Applies only to motors for the following supply

voltages:

• 3 x 200 V / 346 V, 50 Hz

• 3 x 200-220 V / 346-380 V, 60 Hz

• 3 x 220-240 V / 380-415 V, 50 Hz.

Motors for other supply voltages must be connected

to a motor-protective circuit breaker as described for

three-phase motors up to 3 kW.

7.3 Electrical connection

Carry out the electrical connection as shown in the

diagram inside the terminal box cover.

Fig. 9 Wiring diagram

7.4 Frequency converter operation

You can connect three-phase motors to a frequency

converter.

Depending on the frequency converter type, this may

cause increased acoustic noise from the motor.

Furthermore, it may cause the motor to be exposed

to detrimental voltage peaks.

* MG 71- and MG 80-based motors with phase

insulation are available on request.

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 supplier or Grundfos.

Warning

The electrical connection must be carried

out in accordance with local regulations.

Before starting work on the pump, switch

off the power supply. Make sure that the

power supply cannot be accidentally

switched on.

The pump must be connected to an

external all-pole mains switch according to

local regulations.

The product must be earthed and

protected against indirect contact in

accordance with local regulations.

Wires connected to supply terminals, must

be separated from each other and from the

supply by reinforced insulation.

TM03 8781 1008

Caution

MG 71- and MG 80-based motors have no

phase insulation* and must therefore be

protected against voltage peaks higher

than 650 V (peak value) between the

supply terminals.

Note

Self-priming pumps only:

If the pump is connected to a frequency

converter, operation at low speed may

cause the internal recirculation valve to

open. This will result in a drop in pressure

and flow.

English (GB)

11

8. Startup

8.1 Non-self-priming pumps

8.1.1 Liquid filling

1. Close the isolating valve on the discharge side of

the pump.

2. Open the isolating valve in the suction pipe

completely before starting the pump.

3. Remove the filling plug. See fig. 10.

4. Fill the pump housing and the suction pipe

completely with liquid until a steady stream of

liquid runs out of the filling hole.

5. Fit and tighten the filling plug.

6. Start the pump and slowly open the discharge

isolating valve while the pump is running. This

ensures venting and pressure build-up during

startup.

Fig. 10 Position of filling hole and drain hole

8.2 Self-priming pumps

8.2.1 Liquid filling

1. Make sure that the discharge pipe is empty and

that the height from the centre of the suction port

to the first tapping point (H

1

) meets the

requirements. See section 6.2.2 Pipe connection

(self-priming pumps).

2. Open the isolating valves in the suction and

discharge pipes.

3. Open a tap close to the pump so that air can

escape.

4. Remove the filling plug in the pump. See fig. 11.

5. If a filling plug has been installed in the discharge

pipe, remove this plug and use this hole for filling.

Otherwise use the filling hole in the pump.

6. Fill the pump housing and the suction pipe

completely with liquid until a steady stream of

liquid runs out of the filling hole.

7. Fit and tighten the filling plug(s).

8. Start the pump and wait until liquid is pumped. If

you have used the filling hole in the pump, it may

be necessary to repeat steps 1 to 8 to ensure that

the pump is completely filled with liquid.

9. If the pump does not operate properly after

several start attempts, see section 12. Fault

finding.

Fig. 11 Position of filling holes and drain hole

Note

If there is a risk of condensation in the

motor, remove the motor drain plug before

startup and keep the drain hole open

during operation. See fig. 7.

Caution

Do not start the pump until it has been

filled with liquid.

Warning

Pay attention to the direction of the vent

hole, and make sure that the escaping hot

or cold liquid does not cause injury to

persons or damage to the equipment.

Caution

The discharge isolating valve must be

opened immediately after startup of the

pump. Otherwise the temperature of the

pumped liquid may become too high and

cause damage to the equipment.

TM03 8774 1008

Note

If it is difficult for the pump to build up

pressure, it may be necessary to repeat

steps 1 to 6.

Filling hole

Drain hole

Caution

Do not start the pump until it has been

filled with liquid.

Warning

Pay attention to the direction of the vent

hole, and make sure that the escaping hot

or cold liquid does not cause injury to

persons or damage to the equipment.

Note

If connected to a frequency converter, the

pump must run at maximum speed (3450

min

-1

) during startup.

TM05 8169 2013

Note

The pump is allowed to run for 5 minutes

to attempt to suck liquid. If the pump does

not build up pressure and flow, repeat

steps 1 to 8.

Filling hole

Drain hole

Filling hole

English (GB)

12

8.3 Checking the direction of rotation

The motor fan cover has an installation indicator.

See fig. 12. Based on the motor cooling air, it

indicates the direction of rotation of the motor.

Before the motor is started for the first time or if the

position of the indicator has been changed, the

indicator function should be checked, for instance by

moving the indicator field with a finger.

To determine whether the direction of rotation is

correct or wrong, compare the indication with the

table below.

* To reverse the direction of rotation, switch off the

power supply and interchange any two of the

incoming supply wires.

Fig. 12 Installation indicator

You can place the indicator in various positions on

the motor, but do not place it between the cooling

fins close to the screws that hold the fan cover.

The correct direction of rotation is also shown by

arrows on the motor fan cover.

9. Maintenance

The internal pump parts are maintenance-free. You

must keep the motor clean in order to ensure

adequate cooling of the motor. If the pump is

installed in dusty environments, clean and check the

pump regularly. Take the enclosure class of the

motor into account when cleaning.

The motor has maintenance-free, greased-for-life

bearings.

9.1 Frost protection

Pumps which are not being used during periods of

frost must be drained to avoid damage.

Remove the filling and drain plugs from the pump.

See fig. 10.

Do not refit the plugs until the pump is taken into

operation again.

9.2 Cleaning

Prior to a long period of inactivity, flush the pump

with clean water to prevent corrosion and deposits in

the pump.

Use acetic acid to remove possible lime deposits

from the pump.

Note

The description below applies to

three-phase motors only.

Indicator field Direction of rotation

Black Correct

White/reflecting Wrong*

TM04 0360 1008

Indicator field

Warning

Before starting work on the pump, switch

off the power supply. Make sure that the

power supply cannot be accidentally

switched on.

Warning

Make sure that the escaping water does

not cause injury to persons or damage to

the equipment.

Caution

Before startup after a period of inactivity,

the pump and the suction pipe must be

completely filled with liquid. See section

8. Startup.

English (GB)

13

10. Service

Before the pump is returned to Grundfos for service,

the safety declaration at the end of these instructions

must be filled in by authorised personnel and

attached to the pump in a visible position.

If Grundfos is requested to service the pump, it must

be cleaned before it is returned.

If proper cleaning is not possible, all relevant

information about the pumped liquid must be

provided.

If the above is not fulfilled, Grundfos can refuse to

accept the pump for service.

Possible costs of returning the pump are to be paid

by the customer.

The safety declaration can be found at the end of these

instructions (only in English).

11. Technical data

11.1 Enclosure class

• IP55 (standard)

• IPx5 (with motor drain plug removed)

11.2 Sound pressure level

The sound pressure level of the pumps is lower than

70 dB(A).

11.3 Ambient temperature

1)

Only the stainless-steel variant (EN 1.4301 / AISI

304) is suitable for pumping liquids with

temperatures above 90 °C (194 °F).

2)

Does not apply for pumps with PSE approval

(pumps approved for use in Japan).

If the ambient temperature exceeds 55 °C (45 °C for

pumps with PSE approval), do not fully load the

motor due to the risk of overheating. In such cases,

you may need to derate the motor output or use an

oversize motor with a higher rated output. You can

derate the CM pumps in relation to the ambient

temperature without any consequence. Contact

Grundfos for further information. See fig. 13.

Fig. 13 Derating in relation to the ambient

temperature

Caution

If used for a liquid which is injurious to

health or toxic, the pump will be classified

as contaminated.

Caution

Self-priming pumps:

The liquid temperature must not exceed 60

°C (140 °F).

Maximum ambient

temperature

Liquid temperature

55 °C (131 °F)

2)

90 °C (194 °F)

1) + 2)

50 °C (122 °F)

2)

100 °C (212 °F)

1) + 2)

45 °C (113 °F) 110 °C (230 °F)

1)

40 °C (104 °F) 120 °C (248 °F)

1)

TM05 7630 1313

20 25 30 35 40 45 50 55 60 65 70 75 80

50

60

70

80

90

100

[%]

P2

t [°C]

English (GB)

14

11.4 Maximum system pressure and permissible liquid temperature

* At liquid temperatures below 0 °C (32 °F), higher motor outputs may be needed due to increased viscosity,

for instance if you have added glycol to the water.

** 120 °C applies only if the pump has an AQQE shaft seal.

*** CM pumps for pumping liquids at temperatures below -20 °C are available on request. Please contact

Grundfos.

11.5 Minimum inlet pressure

You can calculate the minimum inlet pressure "H" in

metres head required during operation to avoid

cavitation in the pump from the following formula:

If the calculated value of "H" is positive, the pump

can operate with a maximum suction lift of "H"

metres.

If the calculated value of "H" is negative, a minimum

suction head of "H" metres is required during

operation to avoid cavitation.

Example

p

b

= 1 bar.

Pump type: CM 3, 50 Hz.

Flow rate: 4 m

3

/h.

NPSH (from fig. 5, page 381): 3.3 metres head.

H

f

= 3.0 metres head.

Liquid temperature: 90 °C.

H

v

(from fig. 9, page 384): 7.2 metres head.

H = p

b

x 10.2 - NPSH - H

f

- H

v

- H

s

[metres head].

H = 1 x 10.2 - 3.0 - 3.3 - 7.2 - 0.5 = -3.8 metres head.

This means that a suction head of 3.8 metres is

required during operation.

Pressure calculated in bar: 3.8 x 0.0981 = 0.37 bar.

Pressure calculated in kPa: 3.8 x 9.81 = 37.3 kPa.

11.6 Maximum inlet pressure

The actual inlet pressure plus the pressure when the

pump is operating against a closed valve must

always be lower than the maximum system pressure.

Material variant Shaft seal Permissible liquid temperature*

Maximum system

pressure

Cast iron

(EN-GJL-200)

AVBx

-20 to 40 °C

41 to 90 °C

(-4 to 104 °F)

(105.8 to 194 °F)

10 bar

6 bar

(145 psi)

(87 psi)

AQQx -20 to 90 °C (-4 to 194 °F) 10 bar (145 psi)

Stainless steel

(EN 1.4301 / AISI 304)

AVBx

-20 to 40 °C

41 to 90 °C

(-4 to 104 °F)

(105.8 to 194 °F)

10 bar

6 bar

(145 psi)

(87 psi)

AQQx

-20*** to 90 °C

91 to 120 °C**

(-4 to 194 °F)

(195.8 to 248 °F)

16 bar

10 bar

(232 psi)

(145 psi)

Stainless steel

(EN 1.4401 / AISI 316)

AVBx

-20 to 40 °C

41 to 90 °C

(-4 to 104 °F)

(105.8 to 194 °F)

10 bar

6 bar

(145 psi)

(87 psi)

AQQx

-20*** to 90 °C

91 to 120 °C**

(-4 to 194 °F)

(195.8 to 248 °F)

16 bar

10 bar

(232 psi)

(145 psi)

H=p

b

x 10.2 - NPSH - H

f

- H

v

- H

s

p

b

= Barometric pressure in bar.

The barometric pressure can be set to 1

bar.

In closed systems, p

b

indicates the

system pressure in bar.

NPSH = Net Positive Suction Head in metres

head. To be read from the NPSH curves

on pages 381 to 383 at the highest flow

the pump will be delivering.

H

f

= Friction loss in suction pipe in metres

head.

H

v

= Vapour pressure in metres head.

See fig. 9, page 384.

t

m

= liquid temperature.

H

s

= Safety margin = min. 0.5 metres head.

English (GB)

15

12. Fault finding

Warning

Before removing the terminal box cover,

switch off the power supply. Make sure

that the power supply cannot be

accidentally switched on.

Warning

The pumped liquid may be scalding hot

and under high pressure. Before any

removal or dismantling of the pump, the

system must therefore be drained, or the

isolating valves on either side of the pump

must be closed.

Fault Cause Remedy

1. The pump does not run. a) Supply failure. Switch on the switch.

Check cables and cable connections

for defects and loose connections.

b) Motor protection tripped. See 2. a), b), c), d), e).

c) Control-current circuit

defective.

Repair or replace the control-current

circuit.

2. Motor-protective circuit

breaker has tripped (trips

immediately when power

supply is switched on).

a) Contacts of the

motor-protective circuit

breaker or magnet coil

defective.

Replace the contacts of the

motor-protective circuit breaker, the

magnet coil or the entire

motor-protective circuit breaker.

b) Cable connection is loose or

faulty.

Check cables and cable connections

for defects, and replace the fuses.

c) Motor winding is defective. Repair or replace the motor.

d) The pump is mechanically

blocked.

Switch off the power supply, and

clean or repair the pump.

e) The setting of the

motor-protective circuit

breaker is too low.

Set the motor-protective circuit

breaker according to the rated

current of the motor (I

1/1

).

See nameplate.

3. The motor-protective circuit

breaker trips occasionally.

a) The setting of the

motor-protective circuit

breaker is too low.

See 2. e).

b) Periodic supply fault. See 2. b).

c) Periodically low voltage. Check cables and cable connections

for defects and loose connections.

Check that the power supply cable of

the pump is correctly sized.

4. The motor-protective circuit

breaker has not tripped, but

the pump is inadvertently

out of operation.

a) See 1. a), b), c) and 2. d).

5. The pump performance is

unstable.

a) Pump inlet pressure too low. Check the inlet conditions of the

pump.

b) Suction pipe is partly blocked

by impurities.

Remove and clean the suction pipe.

c) Leakage in suction pipe. Remove and repair the suction pipe.

d) Air in suction pipe or pump. Vent the suction pipe or pump.

Check the inlet conditions of the

pump.

6. The pump performance is

unstable, and the pump is

noisy.

Self-priming pumps only:

a) The differential pressure

across the pump is too low.

Close the tap gradually until the

discharge pressure is stable and the

noise has ceased.

English (GB)

16

13. Further product information

13.1 Service documentation

Service documentation is available in Grundfos

Product Center

(http://product-selection.grundfos.com/).

If you have any questions, please contact the

nearest Grundfos company or service workshop.

14. 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.

7. The pump runs, but gives

no water.

a) Pump inlet pressure too low. See 5. a).

b) The suction pipe is partly

clogged by impurities.

See 5. b).

c) The foot or non-return valve is

stuck in its closed position.

Remove and clean, repair or replace

the valve.

d) Leakage in suction pipe. See 5. c).

e) Air in suction pipe or pump. See 5. d).

8. When startup is attempted,

the pump will start, but

delivers no pressure or flow.

Self-priming pumps only:

a) Liquid column above

non-return valve in discharge

pipe prevents the pump from

self-priming.

Empty the discharge pipe. Make

sure that the non-return valve does

not hold back liquid in the discharge

pipe. Repeat the startup procedure

in section 6.2.2 Pipe connection

(self-priming pumps).

b) Suction pipe draws in air. Make sure that the suction pipe is

airtight from pump to liquid level.

Repeat the startup procedure in

section 6.2.2 Pipe connection

(self-priming pumps).

9. The pump runs, but does

not deliver the rated flow.

Self-priming pumps only:

a) The internal valve did not

close.

Close the tap gradually until a

sudden rise in pressure or flow can

be seen. Then open the tap

gradually until the required flow is

reached.

10. The pump runs backwards

when switched off.

a) Leakage in suction pipe. See 5. c).

b) Foot or non-return valve

defective.

See 7. c).

c) The foot valve is stuck in

completely or partly open

position.

See 7. c).

11. The pump runs with

reduced performance.

a) Wrong direction of rotation.

Three-phase pumps only:

Switch off the power supply with the

external circuit breaker, and

interchange two phases in the pump

terminal box. See also section

8.3 Checking the direction of

rotation.

b) See 5. a), b), c), d).

Fault Cause Remedy

 (BG)

17

 (BG)     

    



.

1.    

17

2. 

18

3.   

18

4. 

18

5. 

18

5.1     

18

5.2     

19

6.  

19

6.1   

19

6.2  

20

6.3    

21

6.4    

21

6.5     

21

7.  

22

7.1 



22

7.2   

22

7.3  

22

7.4    

22

8. 

23

8.1  

23

8.2  

23

8.3     

24

9. 

24

9.1   

24

9.2 

24

10. 

25

11.  

25

11.1   

25

11.2    

25

11.3  

25

11.4    

 

 

26

11.5   

26

11.6   

26

12.   

27

13.  



29

13.1  

29

14.   

29



 ,  

   .

   

    

   .



    

    

.

   , 

     

  ,    

    

    

,   

.

     

 

   .



     

 ,     

.



    

    ,  

  

  .



     

     

  .

Внимание

    

    

   

.

Указание

  ,  

   

.

 (BG)

18

2. 

    

  CM   Grundfos.

3.   

      

    

     

 .

4. 

  , 

   ,  

 ,  

  ,   

    

.

5. 

5.1     

      

      

 .

5.1.1     

     

     -. .

    . 1  . 380.

5.1.2     

     

     -. .

    . 2  . 380.

Указание

   

   

   

 .



      

    

.

. 

1   

2   

3   

4  

5  ...

6   

7    

8

    

  - ...

9

  

10   

11  

12    

13  

. 

1  CE

2  EAC

3  PSE

4  cULus

5  UL

6  cURus

7     

8   

 (BG)

19

5.2     

       

   .

     

      

-. .     . 3  .

380.

6.  

   ,  

      

  .

6.1   

     

     

    .  

       10 Nm.

  ,    

      

   .

. 1   - 



  .

. 1   

●      .

  ,    

 ,     .

    

.

. 

1     

2

...  50 Hz   

 

3

    50 Hz

4    50 Hz  kW

5 

6  

7    50 Hz  hp

8    50 Hz

9      50 Hz

10    50 Hz

11  

12  , 50 Hz

13 

14    60 Hz  kW

15     NEMA

16    60 Hz  hp

17   

 60 Hz

18

...  60 Hz   

 

19   

20  

21    (  )

22   

23    60 Hz

24      60 Hz

25    60 Hz

26  , 60 Hz

27    IEC

28  

29     IEC

30

  

31     NEMA

32     

33   

34      NEMA

35     NEMA

37  CC122B

38  CE

39  cURus



     

  ,    

      

  .

TM05 6389 4712



 



 



 

1- -

2  -

3  -

4 

5- -

6 





 (BG)

20

6.2  

    

    .    

   ,  

   .

      

,     

      

. . . 4.

  

    

  ,   

     .

      

  .

   

,   EN ISO 13480-3:2012.

      

EN ISO 13920:1996,  C.

     

 

  

.

  ,    

   ,  

   . . . 2.

. 2  

6.2.1   ( )

. 3     

6.2.2   ( )

     , 

 

,   .

   :

. . 4.

•     

      

    (H

1

).

      

, H

1

    

      

.

     

.

•       

0,5      (H

3

).

     

   .  

    . .

. 4, . A.

Указание

 :

    

 ,    - 

0,05 bar.   

  

    

.

TM04 0338 0608

Внимание

    

    

 .

 : 50-60 Nm. 

     

.

TM04 0358 1008

Указание

    

     

   ,   

,    

 -.   

  ,  

    .

 



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Grundfos CM Installation And Operating Instructions Manual

Grundfos CM Installation And Operating Instructions Manual

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