Grundfos CR-H Installation And Operating Instructions Manual

CR-H, CRN-H

GRUNDFOS INSTRUCTIONS

Installation and operating instructions

2

3

CR-H, CRN-H

Installation and operating instructions 4

Notice d’installation et d’entretien 19

Instrucciones de instalación y funcionamiento 37

4

LIMITED WARRANTY

Products manufactured by GRUNDFOS PUMPS CORPORATION (Grundfos) are warranted

to the original user only to be free of defects in material and workmanship for a period of

24 months from date of installation, but not more than 30 months from date of manufacture.

Grundfos' liability under this warranty shall be limited to repairing or replacing at Grundfos'

option, without charge, F.O.B. Grundfos' factory or authorized service station, any product

of Grundfos' manufacture. Grundfos will not be liable for any costs of removal, installation,

transportation, or any other charges which may arise in connection with a warranty claim.

Products which are sold but not manufactured by Grundfos are subject to the warranty

provided by the manufacturer of said products and not by Grundfos' warranty. Grundfos will

not be liable for damage or wear to products caused by abnormal operating conditions,

accident, abuse, misuse, unauthorized alteration or repair, or if the product was not installed

in accordance with Grundfos' printed installation and operating instructions.

To obtain service under this warranty, the defective product must be returned to the

distributor or dealer of Grundfos' products from which it was purchased together with proof

of purchase and installation date, failure date, and supporting installation data. Unless

otherwise provided, the distributor or dealer will contact Grundfos or an authorized service

station for instructions. Any defective product to be returned to Grundfos or a service station

must be sent freight prepaid; documentation supporting the warranty claim and/or a Return

Material Authorization must be included if so instructed.

GRUNDFOS WILL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL

DAMAGES, LOSSES, OR EXPENSES ARISING FROM INSTALLATION, USE, OR ANY

OTHER CAUSES. THERE ARE NO EXPRESS OR IMPLIED WARRANTIES, INCLUDING

MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, WHICH EXTEND

BEYOND THOSE WARRANTIES DESCRIBED OR REFERRED TO ABOVE.

Some jurisdictions do not allow the exclusion or limitation of incidental or consequential

damages and some jurisdictions do not allow limit actions on how long implied warranties

may last. Therefore, the above limitations or exclusions may not apply to you. This warranty

gives you specific legal rights and you may also have other rights which vary from

jurisdiction to jurisdiction.

5

CONTENTS

Page

1. Symbols used in this document 5

2. Delivery 5

2.1 Check that you have the right pump 5

2.2 Check the condition of the pump 5

3. Identification 6

3.1 Type key for CR, CRN 1s, 1, 3, 5, 10, 15 and 20 H 6

3.2 Type key for CR, CRN 32, 45, 64 and 90 H 6

4. Codes 6

5. Applications 7

5.1 Pumped liquids 7

6. Operating conditions 7

6.1 Ambient temperature and altitude 7

6.2 Liquid temperature 7

6.3 Maximum permissible operating pressure and liquid

temperature for the shaft seal 7

6.4 Minimum inlet pressure – NPSHR 8

6.5 Maximum inlet pressure 8

6.6 Minimum flow rate 9

7. Technical data 9

7.1 Electrical data 9

7.2 Frequency of starts and stops 9

7.3 Dimensions and weights 9

7.4 Sound pressure level 9

8. Installation 9

8.1 Base plate 9

8.2 Foundation 9

8.3 Vibration dampening 10

8.4 Mounting on a Grundfos base plate 11

8.4.1 Bolt torques 11

8.5 Outdoor installation 11

8.6 Hot surfaces 11

8.7 Tightening torques 11

8.8 Piping 12

8.9 Recommended piping practices 12

8.10 Check valves 12

8.11 Bypass 12

8.12 Assembly of motor and pump end 12

9. Electrical connection 13

9.1 Single-phase motors 13

9.2 Three-phase motors 13

9.3 Frequency converter operation 13

10. Start-up 14

10.1 Start-up procedure 14

11. Maintenance 14

11.1 Motor inspection 14

11.2 Motor lubrication 15

11.3 Motor lubrication schedule

(for motors with grease fittings) 15

11.4 Preventative maintenance 16

12. Frost protection 16

13. Service 16

13.1 Service kits and service documentation 16

14. Start-up (air-cooled top) 17

15. Troubleshooting 18

16. Disposal 18

1. Symbols used in this document

2. Delivery

2.1 Check that you have the right pump

Read the pump nameplate to make sure you have received the

pump you ordered.

2.2 Check the condition of the pump

The shipping carton your pump came in is specially designed

around your pump during production to prevent damage. As a

precaution, the pump should remain in the carton until you are

ready to install it. Examine the pump for any damage that may

have occurred during shipping. Examine any other parts of the

shipment as well for any visible damage.

If the pump is supplied as a complete unit (motor attached to

pump end), the position of the coupling (that connects the pump

shaft to the motor shaft) is set at factory specifications. No

adjustment is required.

If the unit is supplied as a pump end only, follow the adjustment

procedures in section 8.12 Assembly of motor and pump end.

Pump without motor (CR, CRN 1s, 1, 3, 5, 10, 15 and 20 H

only)

If you purchased a pump without a motor, the shaft seal has been

set by the factory. Do not loosen the three set screws on the shaft

seal when attaching the motor.

Pump without motor (CR, CRN 32, 45, 64 and 90 H only)

If you purchased a pump without a motor, you must install the

shaft seal. The shaft seal is protected in its own sub boxing within

the pump packaging crate. Read the seal installation instructions

which are included in the pump package.

Pump without motor (all)

To protect the shaft and bearings during shipment, a shaft holder

protective device is used. This device must be removed prior to

installation of the shaft seal or motor.

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!

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

When the shipment is received, extreme care

should be exercised during unloading. Heavy

parts should be skidded to the ground if lifting

equipment is not available. It is recommended a

forklift or crane be used to unload the equipment.

Do not drop the unit, or any parts, as damage may

cause trouble in assembly and operation of the

units.

CR-H

Centrifugal pump with standard cast-iron and

304 stainless-steel construction

CRN-H

Centrifugal pump; all parts in contact with water are

316 stainless-steel construction

CRE-H

Centrifugal pump with a Grundfos MLE VFD motor

attached

6

3. Identification

3.1 Type key for CR, CRN 1s, 1, 3, 5, 10, 15 and 20 H

3.2 Type key for CR, CRN 32, 45, 64 and 90 H

4. Codes

Example CR 3-10H-X-X-X-XXXX

Pump range: CR, CRN

Rated flow rate in m

3

/h (x 5 = GPM)

Number of impellers

Code for pump version

H: Horizontal pump

Code for pipework connection

Code for materials

Code for rubber pump parts

Code for shaft seal

Example CR 32 -2 -1 H- X- X- X- XXXX

Pump range: CR, CRN

Rated flow rate in m

3

/h (x 5 = GPM)

Number of stages

Number of impellers with reduced diameter

Code for pump version

H: Horizontal pump

Code for pipework connection

Code for materials

Code for rubber pump parts

Code for shaft seal

Example H-GA-A-E-HQQE

Pump version

A Basic version*

BOversize motor

E Certificate/approval

F

CR pump for high temperatures

(air-cooled top assembly)

H Horizontal version

I Different pressure rating

J Pump with different maximum speed

K Pump with low NPSH

M Magnetic drive

N Fitted with sensor

P Undersize motor

T

Oversize motor

(two flange sizes bigger)

X Special version*

Pipework connection (suction x discharge)

GA ANSI 1.5" x 1"

GB ANSI 3" x 1.5"

GC ANSI 3" x 2"

G05 ANSI 2" x 1"

G10 ANSI 3" x 2"

G20 ANSI 3" x 1.5

G30 ANSI 3" x 1.5"

G40 ANSI 4" x 3"

G50 ANSI 3" x 1.5"

G60 ANSI 3" x 2"

G70 ANSI 4" x 3"

G22 ANSI 2" x 2"

G33 ANSI 3" x 3"

G44 ANSI 4" x 4"

Materials

A Basic version

D Carbon-graphite-filled PTFE (bearings)

G Wetted parts AISI 316

GI All parts stainless steel, wetted parts AISI 316

I Wetted parts AISI 304

II All parts stainless steel, wetted parts AISI 304

K Bronze (bearings)

S SiC bearings + PTFE neck rings

X Special version

Rubber pump parts

E EPDM

FFXM

KFFKM

VFKM

Shaft seal

H Balanced cartridge seal with O-ring

K Metal-bellows cartridge seal

O Double seal, back-to-back

P Double seal, tandem

X Special version

B Carbon, synthetic-resin-impregnated

H Cemented tungsten carbide, embedded (hybrid)

Q Silicon carbide

U Cemented tungsten carbide

X Other ceramics

E EPDM

FFXM

KFFKM

VFKM

* If a pump covers more than two pump versions, the code for

the pump version is X. X also indicates special pump versions

not listed above.

Example H-GA-A-E-HQQE

7

5. Applications

Grundfos multistage, horizontal, end-suction centrifugal pumps,

types CR-H and CRN-H, are designed for a wide range of

applications.

CR-H and CRN-H

CR-H and CRN-H pumps are suitable for liquid transfer,

circulation and pressure boosting of cold or hot clean liquids.

CRN-H

Use CRN-H pumps in systems where all parts in contact with the

liquid are made of high-grade stainless steel.

5.1 Pumped liquids

The CR-H and CRN-H are capable of pumping thin, clean, non-

flammable liquids, not containing solid particles or fibers. 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.

6. Operating conditions

6.1 Ambient temperature and altitude

If the ambient temperature exceeds the maximum temperature

limits of the pump or the pump is installed at an altitude

exceeding the altitude values in the chart below, 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 at

high altitudes. In such cases, it may be necessary to use a motor

with a higher rated output (P

2

).

Fig. 1 Relationship between motor output (P

2

) and

ambient temperature/altitude

Legend

Example: From fig. 1 it appears that P

2

must be reduced to 88 %

when a pump with a NEMA Premium efficiency, ML motor is

installed 15584 feet above sea level. At an ambient temperature

of 167 °F, P

2

of a standard efficiency motor must be reduced to

74 % of rated output.

6.2 Liquid temperature

The tables on pages 19 and 20 state the relationship between

liquid temperature range and maximum permissible operating

pressure.

6.3 Maximum permissible operating pressure and

liquid temperature for the shaft seal

CR 1s to CR 20 H

Fig. 2 Operating range of standard shaft seals for CR 1s to

CR 20 H

CR 32 to CR 90 H

Fig. 3 Operating range of standard shaft seals for CR 32 to

CR 90 H

TM03 4272 2006

Pos. Description

1 NEMA Standard efficiency motors

2 NEMA Premium efficiency motors

Note

The maximum permissible operating pressure

and liquid temperature ranges apply to the pump

only.

60 80 100 120 140 160 180

T [°F]

50

60

70

80

90

100

[%]

P2

1

2

3280 7382 11483 15584 ft

Note

The diagrams below apply to clean water and

water containing anti-freeze liquid.

TM02 7537 1409TM04 4473 1409

Shaft

seal

Description

Max.

temperature

range

[°F]

HQQE

O-ring (cartridge) (balanced seal),

SiC/SiC, EPDM

–22 °F to +248 °F

HQQV

O-ring (cartridge) (balanced seal),

SiC/SiC, FKM

–4 °F to +194 °F

HUBE

O-ring (cartridge) (balanced seal),

TC/carbon, EPDM

+32 °F to +248 °F

HUBV

O-ring (cartridge) (balanced seal),

TC/carbon, FKM

+32 °F to +194 °F

KUBE

Bellows, metal (cartridge),

TC/carbon, EPDM

+32 °F to +248 °F

KUBV

Bellows, metal (cartridge),

TC/carbon, FKM

+32 °F to +194 °F

KUHE

Bellows, metal (cartridge),

TC/carbon with embedded TC,

EPDM

+32 °F to +194 °F

KUHV

Bellows, metal (cartridge),

TC/carbon with embedded TC,

FKM

+32 °F to +194 °F

KUUE

Bellows, metal (cartridge),

TC/TC, EPDM

–22 °F to +194 °F

KUUV

Bellows, metal (cartridge),

TC/TC, FKM

–4 °F to +194 °F

TC = tungsten carbide.

-40 0 40 80 120 160 200 240 t [°F]

0

100

200

300

400

[psi]

p

-40 -20 0 20 40 60 80 100 t [°C]

0

5

10

15

20

25

[bar]

p

HQQE

HQQV

HQQE

-40 0 40 80 120 160 200 240 t [°F]

0

100

200

300

400

500

[psi]

p

-40 -20 0 20 40 60 80 100 t [°C]

0

5

10

15

20

25

30

[bar]

p

KUBE

HQQE / HQQV HQQE

KUUE

KUUV

KUBE / KUBV

KUUE / KUUV

KUHE / KUHV

8

CRN-H pumps using a type H shaft seal with EPDM rubber parts,

HxxE, can be cleaned in place (CIP) with liquids up to 302 °F

(150 °C) for maximum 15 minutes.

CR-H and CRN-H pumps are not suitable for the pumping of

liquids above 248 °F (120 °C) for long periods.

6.4 Minimum inlet pressure – NPSHR

Calculation of the inlet pressure "H" is recommended in the

following cases:

• When the liquid temperature is high.

• When the flow is significantly higher than the rated flow.

• When the water is drawn from depths.

• When the water is drawn through long pipes.

• When the inlet conditions are poor.

To avoid cavitation, make sure that there is a minimum pressure

on the suction side of the pump.

The maximum suction lift "H" in feet can be calculated as follows:

H = p

b

– NPSHR – H

f

– H

v

– H

s

p

b

= Barometric pressure in feet absolute.

(Barometric pressure can be set to 33.9 feet at sea

level.)

In closed systems, p

b

indicates system pressure in

feet.

NPSHR = Net Positive Suction Head Required in feet.

(To be read from the NPSHR curve at the highest

flow the pump will be delivering.)

H

f

= Friction loss in suction pipe in feet.

(At the highest flow the pump will be delivering.)

H

v

= Vapor pressure in feet.

(To be read from the vapor pressure scale. "H

v

"

depends on the liquid temperature "T

m

".)

H

s

= Safety margin = minimum 2.0 feet.

If the "H" calculated is positive, the pump can operate at a suction

lift of maximum "H" feet.

If the "H" calculated is negative, an inlet pressure of minimum "H"

feet is required.

Fig. 4 Minimum inlet pressure – NPSHR

Always check the NPSHR value of the pump at the highest

possible flow. The NPSH curves can be found on pages 17

and 18.

6.5 Maximum inlet pressure

The table on page 21 states the maximum permissible inlet

pressure. However, the actual inlet pressure + maximum pump

pressure (at no flow) must always be lower than the maximum

operating pressures stated on pages 19 and 20.

The pumps are pressure-tested at a pressure of 1.5 times the

values stated on pages 19 and 20.

Note

The pumping of liquids above 248 °F (120 °C) may

result in periodical noise and reduced pump life.

TM04 3689 4808

Note

In order to avoid cavitation, never select a pump

whose duty point lies too far to the right on the

NPSHR curve.

66

49

39

33

26

20

16

13

10

6.6

3.3

2.6

2.0

1.3

0.9

0.7

0.3

4.9

250

230

194

212

176

158

140

122

104

86

68

50

32

Hv

(Ft)

tm

(°F)

300

270

280

82

115

148

131

98

320

340

360

370

203

259

328

413

H

f

p

b

NPSHR

H

v

H

9

6.6 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 rated flow rate in relation to the liquid temperature.

Fig. 5 Minimum flow rate

Legend

7. Technical data

7.1 Electrical data

See motor nameplate and section 9. Electrical connection.

7.2 Frequency of starts and stops

7.3 Dimensions and weights

See CR-H, CRN-H Product Guide.

7.4 Sound pressure level

See page 22.

8. Installation

The pump must be secured to a horizontal plane and solid

foundation by bolts. When installing the pump, follow the

instructions in the following sections.

8.1 Base plate

Make sure that the base plate is clean of any debris. It may also

be necessary to have the base plate coated to protect the

material.

8.2 Foundation

The foundation/installation should be carried out in accordance

with the following instructions.

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. As a rule of

thumb, the weight of the concrete foundation should be 1.5 times

the weight of the pump and base plate. The concrete foundation

must have an absolutely level and even surface.

Place the pump and base plate assembly on the foundation, and

fasten it. The base plate must be supported on the whole area.

See fig. 6.

Fig. 6 Correct installation

The foundation should be at least 3 to 6 inches longer and wider

than the base plate.

The mass of the foundation must be at least 1.5 times the total

mass of the pump and base plate assembly.

In installations where noiseless operation is particularly

important, a foundation with a mass up to 5 times that of the

pump and base plate assembly is recommended. The pump may

be fastened directly to an existing concrete floor if the floor meets

the criteria of a foundation.

To properly hold the base plate to the foundation, proper

foundation bolts are required. For proper holding of the base

through the foundation, the bolt length should extend from in the

foundation, the base height, and 0.25" - 0.50" above the nut.

These foundation bolts are embedded in the concrete floor or

foundation, and should be positioned according to the bolt

manufacturer’s instructions. To assist in the proper location of the

bolts, a template can be formed. The bolt locations should be

double-checked with drawings and base.

TM02 7538 3703

Curves Description

CR-H with standard top

CR-H with air-cooled top

Caution

Never operate the pump against a closed

discharge valve.

Motor sizes

Maximum number of starts per hour

Grundfos ML Baldor

0.33 to 5.0 hp 200 20

7.5 to 15 hp 100 15

20 to 100 hp 40 10

t [°F]

0

10

20

30

Qmin

[%]

40 60 80 100 120 140 160 180

t [°C]

140 176 212 248 284 320 356104

Note

The pump should be placed as close to the liquid

source as possible. Adequate space for

operation and maintenance should be taken into

consideration.

TM04 3730 4908

10

Bolt sleeves can be used to allow final positioning of the bolts.

The sleeves are a minimum of 3 times larger than the bolt, and

have a length of at least 10 times the diameter. Figure 7 (pos. b)

shows the foundation bolt and the bolt sleeve in which it is

installed.

Fig. 7 Bolt in position (pos. a) and bolt sleeve detail (pos. b)

When the foundation bolts are in position, the pump can be

placed on the foundation. The base plate can now be leveled

using shims, if necessary, so that it is completely horizontal.

See fig. 8.

Fig. 8 Alignment with shims

8.3 Vibration dampening

If vibration dampers are used, they must be installed under the

foundation.

Pumps with motor size ≤ 40 hp (30 kW) can use vibration

dampers as shown in fig. 9.

For pumps with motor sizes ≥ 50 hp (37 kW), use a vibration

damper as shown in fig. 10.

Fig. 9 Pump on vibration dampers

Fig. 10 Pump on vibration damper

TM03 4589 2206 - TM04 3731 4908

Pos. Description

1Nut

2 Washer

3 Base plate

4 Bolt sleeve

5 Non-bonding fill

6 Concrete

TM03 4588 2206

1

2

3

4

5

6

ba

Shims

TM04 3732 4908TM04 3733 4908

Vibration

dampers

Vibration

damper

11

8.4 Mounting on a Grundfos base plate

Check that the Grundfos base plate will fit to your pump model.

The base plate is made with adjustable motor mount sliders to

accommodate a range of Grundfos CR-H pumps. See fig. 11.

The sliders make it possible to separate the motor from the pump

end if service is required.

To mount the pump to the base plate, proceed as follows:

1. Install the base plate (pos. 1) on the foundation in accordance

with the instructions in sections 8.1 to 8.3.

2. If the base plate is grouted, allow grouting sufficient time to

dry.

3. Set the motor mount sliders (pos. 3) in position on the base

plate rails (pos. 2).

Make sure the 1/4" bolts are loose so that the sliders can slide

easily.

4. With a hoist, lower the pump until it is almost on the sliders.

5. Make all necessary adjustments to line up all bolts and bolt

holes and hand-tighten all bolts.

6. Lower the pump completely onto the base plate, and tighten

all bolts to the proper torque (see bolt table).

Fig. 11 Grundfos base plate

8.4.1 Bolt torques

8.5 Outdoor installation

When installed outdoors, it is recommended to provide the motor

with a rain cover or other shelter. On Grundfos ML motors, it is

also recommended to open the bottom most drain hole in the

motor flange.

8.6 Hot surfaces

Figure 12 shows which pump parts get the same temperature as

the pumped liquid.

Fig. 12 Potentially hot surfaces on a CR-H and CRN-H pump

8.7 Tightening torques

The table below shows the recommended tightening torques for

bolts in flanges.

TM04 4123 0809

Pos. Description

1 Base plate

2 Base plate rail

3 Motor mount slider

4 Motor mounting bolt

5 1/4" bolt

6 Grouting hole

7 5/8" bolt

8 Volute mounting pad

9 Hole for lifting hook

10 ANSI mounting hole

Motor frame Bolt size

Bolt torque

[ft-lbs] [Nm]

N/A 1/4" - 20 UNC 7 9.5

56C 5/16" - 18 UNC 14 19

182/184TC 3/8" - 16 UNC 25 34

213/215TC 3/8" - 16 UNC 25 34

254/256TC 1/2" - 13 UNC 62 84

284/286TSC 1/2" - 13 UNC 62 84

324/326TSC 5/8" - 11 UNC 109 148

364/365TSC 5/8" - 11 UNC 109 148

* Torques are based on SAE Grade 5 bolts.

Warning

When pumping hot liquids, care should be taken

to ensure that persons cannot accidentally come

into contact with hot surfaces.

TM04 3734 4908

CR, CRN-H

Torque

[ft-lbs] [Nm]

1s to 5 37-45 50-60

10 to 20 45-52 60-70

32 to 90 52-59 70-80

Pump head

Pump sleeve

Volute

12

8.8 Piping 8.9 Recommended piping practices

• Whenever possible, avoid fittings that cause high pressure

loss, such as elbows or branch tees directly on either side of

the pump.

• The piping should be adequately supported to reduce thermal

and mechanical stress on the pump.

• Good installation practice recommends the system be

thoroughly cleaned and flushed of all foreign materials and

sediment prior to pump installation.

• Furthermore, the pump should never be installed at the lowest

point of the system due to the natural accumulation of dirt and

sediment. If there is excessive sediment or suspended

particles present, it is advisable to use a strainer or filter.

• Grundfos recommends that pressure gauges be installed on

suction and discharge volute ports or in pipes to check pump

and system performance.

8.10 Check valves

A check valve may be required on the discharge side of the pump

to prevent the pump’s inlet pressure from being exceeded. For

example, if a pump with no check valve is stopped because there

is no demand on the system (all valves are closed), the high

system pressure on the discharge side of the pump will "find" its

way back to the inlet of the pump. If the system pressure is

greater than the pump’s maximum inlet pressure rating, the limits

of the pump will be exceeded and a check valve needs to be fitted

on the discharge side of the pump to prevent this condition.

8.11 Bypass

A bypass should be installed in the discharge pipe if there is

any risk that the pump may operate against a closed valve in

the discharge pipe. Flow through the pump is required to ensure

that adequate cooling and lubrication of the pump is maintained.

See fig. 5 for minimum flow rates. Elbows should be a minimum

of 12 inches from the discharge port to prevent erosion.

8.12 Assembly of motor and pump end

Proceed as follows:

1. Remove the key from the motor shaft, if present, and discard.

2. Thoroughly clean the surfaces of the motor and pump end

mounting flange. The motor and shaft must be clean of all oil/

grease and other contaminants where the coupling attaches.

3. Set the motor on the pump end.

4. Place the terminal box in the desired position by rotating the

motor so that the motor feet are in line with the pump foot.

5. Insert the mounting bolts. Then tighten diagonally and evenly:

– for 3/8" bolts (1/2 to 2 hp), tighten to 17 ft- b

– for 1/2" bolts (3 to 40 hp), tighten to 30 ft-lb

– for 5/8" bolts (50 to 60 hp), tighten to 59 ft-lb.

6. CR, CRN 1s, 1, 3 and 5 H

Insert the shaft pin into the shaft hole.

Fit the coupling halves onto the shaft and shaft pin.

Fit the coupling screws and leave loose.

Check that the gaps on either side of the coupling are even

and that the motor shaft keyway is centered in the coupling

half.

Tighten the screws to the correct torque.

CR, CRN 10, 15 and 20 H

Insert the shaft pin into the shaft hole.

Insert the plastic shaft seal spacer beneath the shaft seal

collar.

Fit the coupling halves onto the shaft and shaft pin.

Fit the coupling screws and leave loose.

Check that the gaps on either side of the coupling are even

and that the motor shaft keyway is centered in the coupling

half.

Step Action

1

TM04 3736 4908

The arrows in the drawing show

the direction of flow of liquid

through the pump.

2

TM04 3737 4908

The pump must be installed

horizontally.

Ensure that an adequate supply

of cool air reaches the motor

cooling fan.

3

TM04 3738 4908

To minimize possible noise from

the pump, it is advisable to fit

expansion joints on either side

of the pump. The foundation/

installation must be carried out

as described in section 8.2.

Fit isolation 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

check valve (foot valve).

4

TM02 0114 3800

Install the pipes so that air locks

are avoided, especially on the

suction side of the pump.

5

TM04 3739 4908

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.

13

Tighten the screws to the correct torque.

Remove the plastic shaft seal spacer, and hang it on the inside

of the coupling guard.

CR, CRN 32, 45, 64 and 90 H

Place the plastic adjustment fork under the cartridge seal

collar.

Fit the coupling on the shaft so that the top of the pump shaft

is flush with the bottom of the clearance chamber in the

coupling.

Lubricate the coupling screws with an anti-seize and

lubricating compound.

Tighten the coupling screws (finger-tight) while keeping the

coupling separation equal on both sides and the motor shaft

keyway centered in the coupling half.

When the screws are tight enough to keep the couplings in

place, then tighten the screws diagonally and evenly.

Tighten the coupling screws to 62 ft-lbs (84 Nm).

Remove the adjustment fork from under the cartridge seal

collar, and replace it to the storage location.

7. Check to see that the gaps between the coupling halves are

equal. Loosen and readjust, if necessary.

8. Be certain the pump shaft can be rotated by hand. If the shaft

cannot be rotated or it binds, disassemble and check for

misalignment.

9. Prime the pump.

10.Follow the wiring diagram on the motor nameplate for the

correct motor wiring combination which matches your supply

voltage. Once this has been confirmed, reconnect the power

supply wiring to the motor.

11.Check the direction of rotation by bump-starting the motor.

Rotation must be left to right (counter-clockwise) when looking

directly at the coupling from the motor end.

12.Switch off the power supply, and refit the coupling guards.

After the coupling guards have been installed, the power

supply can be switched on again.

9. Electrical connection

The electrical connection should be carried out by an authorized

electrician in accordance with local regulations.

Field wiring

Wire sizes should be based on the current-carrying properties of

a conductor as required by the latest edition of the National

Electrical Code or local regulations. Direct on line (DOL) starting

is approved due to the extremely fast run-up time of the motor

and the low moment of inertia of the pump and motor. If DOL

starting is not acceptable and reduced starting current is required,

an autotransformer, resistance starter or soft starter should be

used. It is suggested that a fused disconnect be used for each

pump where service and standby pumps are installed.

Recommendation

We recommend the use of flexible conduit. Flexible conduit

allows movement of the motor on the base plate rails if service is

required.

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.

9.1 Single-phase motors

With the exception of 10 hp motors which require external

protection, single-phase motors for CR pumps provided by

Grundfos are multi-voltage, squirrel-cage induction motors with

built-in thermal protection.

9.2 Three-phase motors

CR pumps with three-phase motors must be used with the proper

size and type of motor starter to ensure the motor is protected

against damage from low voltage, phase failure, current

imbalance and overloads. A properly sized starter with manual

reset and ambient-compensated extra quick trip in all three legs

should be used. The overload should be sized and adjusted to

the service factor current rating of the motor.

Under no circumstances should the overloads be set to a higher

value than the service factor current shown on the motor

nameplate. This will void the warranty. Overloads for

autotransformers and resistance starters should be sized in

accordance with the recommendations of the manufacturer.

Three-phase MLE motors (CRE-H pumps) require only fuses as a

circuit breaker. They do not require a motor starter. Check for

phase imbalance.

9.3 Frequency converter operation

Motors supplied by Grundfos

All three-phase motors supplied by Grundfos can be connected to

a frequency converter. The frequency converter must be

configured for variable-torque operation.

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.

Warning

Before removing the terminal box cover and

before removing/dismantling the pump, make

sure that the power supply has been switched off.

The pump must be connected to the power

supply using a supply disconnecting device.

The safe operation of this pump requires that it

be grounded in accordance with the National

Electrical Code and local governing codes or

regulations. Connect the ground wire to the

grounding screw in the terminal box and then to

the acceptable grounding point.

Caution

The need for an emergency stop should be

decided by the user.

Note

Standard allowable phase imbalance difference

is 5 % (voltage and current).

Caution

Grundfos motors, types ML 71 and ML 80, for

supply voltages up to and including 460 V are

without phase insulation (see motor nameplate).

They must be protected against voltage peaks

above 650 V (peak value) between the supply

terminals.

14

We recommend 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.

Other motor makes than those supplied by Grundfos

Please contact the motor manufacturer.

10. Start-up

10.1 Start-up procedure

1. Make sure the power supply is switched off.

2. Check to make sure the pump has been primed. See

procedure below.

Priming procedure

To prime the pump in a closed system or an open system where

the water source is above the pump, proceed as follows:

• Close the pump isolation valve(s), and open the priming plug

on the pump head.

• Gradually open the isolation valve in the suction pipe until a

steady stream of airless water runs out the priming port.

• Close the priming plug and securely tighten. Completely open

the isolation valves.

In open systems where the water level is below the pump inlet,

the suction pipe and pump must be filled and vented of air before

starting the pump.

• Close the discharge isolation valve, and remove the priming

plug.

• Pour water through the priming hole until the suction pipe and

pump are completely filled with water. If the suction pipe does

not slope downwards away from the pump towards the water

level, the air must be purged while being filled.

• Replace the priming plug and securely tighten.

For pumps with air-cooled top, see page 17.

For all systems, proceed as follows:

3. Remove the coupling guard, and rotate the pump shaft by

hand to be certain it turns freely.

4. Verify that the electrical connections are in accordance with

the wiring diagram on the motor.

5. Switch on the power supply momentarily and observe the

direction of rotation. When viewed from the motor end, the

pump should rotate counter-clockwise.

6. To reverse the direction of rotation, first switch off the power

supply.

7. On three-phase motors, interchange any two power leads at

the load side of the starter.

On single-phase motors, see wiring diagram on the

nameplate. Change wiring as required.

8. Switch on the power supply, and again check for proper motor

rotation. Once rotation has been verified, switch off the power

supply again.

9. Do not attempt to refit the coupling guards with the motor

energized. Replace the coupling guard if the rotation is

correct. After the guards are in place, the power supply can be

switched on again.

Operating parameters

CR multistage centrifugal pumps installed in accordance with

these instructions and sized for correct performance will operate

efficiently and provide years of service.

The pumps are water-lubricated and do not require any external

lubrication or inspection.

The motors may require periodic lubrication as noted in section

11. Maintenance.

Under no circumstances should the pump be operated for any

prolonged periods of time without flow through the pump. This

can result in motor and pump damage due to overheating.

A properly sized relief valve should be installed to allow sufficient

water to circulate through the pump to provide adequate cooling

and lubrication of the pump bearings and seals.

Pump cycling

Pump cycling should be checked to ensure the pump is not

starting more often than stated in the table in section

7.2 Frequency of starts and stops.

Rapid cycling is a major cause of premature motor failure due to

increased heat build-up in the motor. If necessary, adjust

controllers to reduce the frequency of starts and stops.

11. Maintenance

Pump bearings and shaft seal are maintenance-free.

11.1 Motor inspection

Inspect the motor at regular intervals, approximately every

500 hours of operation or every three months, whichever occurs

first. Keep the motor clean and the ventilation openings clear.

The following steps should be performed at each inspection:

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.

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.

Caution

Do not start the pump before priming or venting

the pump (step 2).

Never operate the pump dry.

Note

Motors should not be run unloaded or uncoupled

from the pump at any time. Damage to the motor

bearings may occur.

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.

Warning

Do not touch electrical connections before you

first ensure that the power supply has been

disconnected.

Electrical shock can cause serious or fatal injury.

Only qualified personnel should attempt

installation, operation and maintenance of this

equipment.

15

1. Check that the motor is clean. Check that the interior and

exterior of the motor is free of dirt, oil, grease, water, etc. Oily

vapor, paper, pulp, textile lint, etc. can accumulate and block

motor ventilation. If the motor is not properly ventilated,

overheating can occur and cause early motor failure.

2. Use an ohmmeter ("Megger") periodically to ensure that the

integrity of the winding insulation has been maintained.

Record the ohmmeter readings. Immediately investigate any

significant drop in insulation resistance.

3. Check all electrical connectors to be sure that they are tight.

In the case of seasonal operation (motor is idle for more than

six months of the year), it is recommended to grease the motor

when the pump is taken out of operation.

11.2 Motor lubrication

Electric motors are pre-lubricated from factory and do not require

additional lubrication before start-up.

Motors without external grease fittings have sealed bearings that

cannot be relubricated.

Motors with grease fittings should only be lubricated with

approved types of grease (see table below). Do not overgrease

the bearings. Overgreasing will cause increased bearing heat and

may result in bearing/motor failure. Do not mix petroleum grease

and silicon grease in motor bearings.

Bearing grease will lose its lubricating ability over time, not

suddenly. The lubricating ability of a grease (over time) depends

primarily on the following:

• The type of grease.

• The size of the bearings.

• The speed at which the bearings operate.

• The severity of the operating conditions.

Good results can be obtained if the following recommendations

are used in your maintenance program. It should also be noted

that pumps with more stages, pumps running to the left of the

performance curve and certain pump ranges may have higher

thrust loads. Pumps with high thrust loads should be greased

according to the next service interval level.

11.3 Motor lubrication schedule (for motors with

grease fittings)

New motors that have been stored for a year or more should be

regreased.

Procedure

1. Clean all grease fittings. If the motor does not have grease

fittings, the bearings are sealed and cannot be greased

externally.

2. If the motor is equipped with a grease outlet plug, remove it.

This will allow the old grease to be displaced by the new

grease.

3. If the motor is stopped, add the recommended amount of

grease.

If the motor is to be greased while running, a slightly greater

quantity of grease will have to be added.

Note: If new grease does not appear at the shaft hole or

grease outlet plug, the outlet passage may be blocked. At the

next service interval, the bearings must be repacked.

Add grease slowly taking approximately one minute until new

grease appears at the shaft hole in the end plate or grease

outlet plug.

Never add more than 1-1/2 times the amount of grease shown

in the lubrication schedule.

4. For motors equipped with a grease outlet plug, let the motor

run for 20 minutes before replacing the plug.

Severity of

service

Maximum ambient

temperature

Environment

Approved types

of grease

Standard

+104 °F

(+40 °C)

Clean,

little corrosion

Grundfos motors

are greased for life

or will have the

grease type on the

nameplate.

Baldor motors are

greased with

Polyrex EM (Exxon

Mobile).

Severe

+122 °F

(+50 °C)

Moderate dirt,

corrosion

Extreme

> +122 °F

(+50 °C)

or class H

insulation

Severe dirt,

abrasive dust,

corrosion

NEMA/(IEC)

Frame size

Service interval Grease to add

Standard Severe Extreme Weight Volume

hrs hrs hrs OZ./g In

3

/tsp

Up through

210 (132)

5500 2750 550 0.3/8.4 0.6/2

Over 210

through 280

(180)

3600 1800 360

0.61/

17.4*

1.2/3.9*

Over 280 up

through 360

(225)

2200 1100 220

0.81/

23.1*

1.5/5.2*

Over 360

(225)

2200 1100 220

2.12/

60.0*

4.1/

13.4*

* The grease outlet plug must be removed before adding new

grease.

Caution

To avoid damage to motor bearings, grease must

be kept free of dirt. For an extremely dirty

environment, contact Grundfos, the motor

manufacturer or an authorized service center for

additional information. Mixing dissimilar grease

is not recommended.

16

11.4 Preventative maintenance

At regular intervals, depending on the conditions and time of

operation, the following checks should be made:

• Pump meets required performance and is operating smoothly

and quietly.

• There are no leaks, particularly at the shaft seal.

• The motor is not overloading.

• Remove and clean all strainers or filters in the system.

• Verify the tripping of the motor overload protection.

• Check the operation of all controllers. Check unit control

cycling twice and adjust, if necessary.

• If the pump is not operated for unusually long periods, the unit

should be maintained in accordance with these instructions.

In addition, if the pump is not drained, the pump shaft should

be manually rotated or run for short periods of time at monthly

intervals.

• To extend the pump life in severe duty applications, consider

performing one of the following actions:

– Drain the pump after each use.

– Flush the pump, through system, with water or other fluid

that is compatible with the pump materials and process

liquid.

– Disassemble the pump liquid components, and thoroughly

rinse or wash them with water or other fluid that is

compatible with the pump materials and process liquid.

If the pump fails to operate or there is a loss of performance, see

section 15. Troubleshooting.

12. 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 do not replace the drain plug

until the pump is to be used again.

Always replace the drain plug with the original or exact

replacement. Do not replace with a standard plug. Internal

recirculation will occur, reducing the output pressure and flow.

13. Service

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.

13.1 Service kits and service documentation

Service kits, Service instructions and Service videos for CR-H

and CRN-H,

see www.grundfos.com (WebCAPS) or WinCAPS.

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.

Note

If a pump has been used for a liquid which is

toxic or injurious to health, the pump will be

classified as contaminated.

17

14. Start-up (air-cooled top)

Note

Do not start the pump until it has been filled with liquid and vented.

Warning

Pay attention to the direction of the vent hole, and take care to ensure that the escaping liquid does not cause injury

to persons or damage to the motor or other components.

In hot-liquid installations, special attention should be paid to the risk of injury caused by scalding hot liquid.

It is recommended to connect a drain pipe to the 1/2" air vent in order to lead the hot water/steam to a safe place.

Step Action

1

TM04 4280 1109

Close the isolation valve on the discharge side, and open the

isolation valve on the suction side of the pump.

Note: The air-cooled top should only be started up with cold liquid.

2

TM04 4282 1109

Remove the air vent pipe (2) from the air-cooled chamber (1) by

loosening the lock nut and unscrewing the pipe. Slowly fill the

chamber with liquid.

When the chamber is completely filled with liquid, replace the air

vent pipe, and tighten the lock nut securely.

It may be necessary to apply new PTFE tape to the pipe threads

and pipe dope to the chamber threads to seal.

3

TM04 4283 1109

Open the isolation valve on the discharge side of the pump.

4

TM04 4284 1109 - TM04 4285 1109

Start the pump, and check the direction of rotation.

See the correct direction of rotation of the pump on the motor fan

cover.

If the direction of rotation is wrong, interchange any two of the

incoming supply wires.

After 3 to 5 minutes, the air vent has been filled with liquid.

Note: During start-up of a cold pump with hot liquid, it is normal

that a few drops of liquid are leaking from the sleeve.

Closed

Open

1

2

Closed

Open

18

15. Troubleshooting

16. 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, dispose of the product according to local

regulations. Grundfos recommends that the products are

recycled whenever possible.

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 out. Reactivate the motor-protective circuit breaker.

d) Thermal protection has tripped out. 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 out

immediately when

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 out

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

out 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 check valve blocked in closed position. Repair the foot or check 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 check valve is defective. Repair the foot or check 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/shaft seal setting.

See Service instructions.

c) Frequency converter operation. See section 9.3 Frequency converter operation.

Subject to alterations.

19

GARANTIE LIMITÉE

Les produits fabriqués par GRUNDFOS PUMPS CORPORATION (Grundfos) sont couverts

par une garantie à l'utilisateur initial à l'effet qu'ils sont exempts de vices attribuables aux

matériaux et à la fabrication pour une période de 24 mois après la date d'installation, mais

sans excéder une période de 30 mois après la date de fabrication. Selon les termes de cette

garantie, la responsabilité de Grundfos se limitera à réparer ou à remplacer sans frais, à la

discrétion de Grundfos et FAB de l'usine de Grundfos ou d'un poste de service autorisé, tout

produit provenant de l'usine de Grundfos. Grundfos ne sera pas responsable des frais

d'enlèvement, d'installation, de transport, ou de tous les autres frais pouvant être encourus

dans le cadre d'une demande d'indemnité concernant la garantie. Les produits vendus, mais

qui ne sont pas fabriqués par Grundfos, sont couverts par la garantie offerte par les fabri-

cants de ces produits, et ils ne sont pas couverts par la garantie de Grundfos. Grundfos ne

sera pas responsable de la détérioration des produits ou des produits endommagés dans les

cas suivants : conditions d'utilisation anormales, accidents, abus, mauvais usage, modifica-

tion ou réparation non autorisée, ou lorsque le produit n'a pas été installé conformément aux

instructions écrites de Grundfos concernant l'installation et l'exploitation.

Pour obtenir un service selon les termes de cette garantie, vous devez retourner le produit

défectueux au distributeur ou au fournisseur de produits Grundfos qui vous a vendu le

produit, incluant la preuve d'achat et la date d'installation, la date de la défaillance, et les

informations concernant l'installation. Sauf disposition contraire, le distributeur ou le

fournisseur contactera Grundfos ou un poste de service autorisé pour obtenir les

instructions. Tout produit défectueux doit être retourné "fret payé à l'avance" à Grundfos ou

à un poste de service. Les documents décrivant la demande d'indemnité aux termes de la

garantie et/ou une autorisation de retour de marchandise doivent être inclus si exigé.

GRUNDFOS NE SERA PAS RESPONSABLE DES DOMMAGES INDIRECTS OU

CONSÉCUTIFS, DES PERTES, OU DES FRAIS DÉCOULANT DE L'INSTALLATION,

L'UTILISATION, OU DE TOUTE AUTRE CAUSE. IL N'EXISTE AUCUNE GARANTIE

EXPRESSE OU IMPLICITE, INCLUANT LA QUALITÉ MARCHANDE OU L'ADAPTATION À

UNE FIN PARTICULIÈRE, QUI OUTREPASSE LES GARANTIES DÉCRITES OU

RÉFÉRENCÉES CI-DESSUS.

Certaines juridictions ne permettent pas l'exclusion ou la limitation des dommages indirects

ou consécutifs, et certaines juridictions ne permettent pas de limiter la durée des garanties

implicites. Il est donc possible que les limitations ou que les exclusions mentionnées

précédemment ne s'appliquent pas à vous. Cette garantie vous accorde des droits légaux

spécifiques, et vous pouvez également avoir d'autres droits qui varient d'une juridiction à

l'autre.

20

SOMMAIRE

Page

1. Symboles utilisés dans cette notice 20

2. Livraison 21

2.1 Vérifier que vous avez reçu la bonne pompe 21

2.2 Vérifier l'état de la pompe 21

3. Identification 22

3.1 Désignation des pompes

CR, CRN 1s, 1, 3, 5, 10, 15 et 20 H 22

3.2 Désignation des pompes CR,

CRN 32, 45, 64 et 90 H 22

4. Codes 22

5. Applications 23

5.1 Liquides pompés 23

6. Conditions de fonctionnement 23

6.1 Température ambiante et altitude 23

6.2 Température du liquide 23

6.3 Pression de service maximale admissible

et température du liquide pour le joint d'arbre 24

6.4 Pression d’entrée minimale – NPSHR 25

6.5 Pression d'admission maximale 25

6.6 Débit minimum 25

7. Caractéristiques techniques 25

7.1 Caractéristiques électriques 25

7.2 Fréquence des démarrages et des arrêts 25

7.3 Dimensions et poids 25

7.4 Niveau de pression sonore 25

8. Installation 26

8.1 Plaque de support 26

8.2 Base 26

8.3 Amortisseur de vibrations 27

8.4 Installation sur une plaque de support Grundfos 27

8.4.1 Couples de serrage boulons 27

8.5 Installation extérieure 27

8.6 Surfaces chaudes 28

8.7 Couples de serrage 28

8.8 Tuyauterie 28

8.9 Recommandations concernant la tuyauterie 29

8.10 Clapets anti-retour 29

8.11 Dispositif de dérivation 29

8.12 Assemblage du moteur et de l'extrémité de la pompe 29

9. Branchement électrique 30

9.1 Moteurs monophasés 30

9.2 Moteurs triphasés 30

9.3 Fonctionnement du convertisseur de fréquence 30

10. Démarrage 30

10.1 Procédure de démarrage 31

11. Maintenance 32

11.1 Inspection du moteur 32

11.2 Lubrification du moteur 32

11.3 Plan de lubrification moteur (pour moteurs

à embouts de lubrification) 33

11.4 Maintenance préventive 33

12. Protection contre le gel 33

13. Révision 33

13.1 Kits et documention d'entretien 33

14. Démarrage (partie supérieure refroidie à l'air) 34

15. Détection des pannes 35

16. Mise au rebut 36

1. Symboles utilisés dans cette notice

Avertissement

Avant d'entamer les opérations d'installation,

étudier avec attention la présente notice d'instal-

lation et de fonctionnement. L'installation et le

fonctionnement doivent être conformes aux

réglementations locales et faire l'objet d'une

bonne utilisation.

Avertissement

Si ces instructions de sécurité ne sont pas

observées, il peut en résulter des dommages

corporels !

Précautions

Si ces instructions ne sont pas respectées, cela

peut entrainer un dysfonctionnement ou des

dégats sur le matériel !

Nota

Ces instructions rendent le travail plus facile et

assurent un fonctionnement fiable.

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