HS Operational manual

8/14/2019 HS Operational manual

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HSHorizontal split case pump

GRUNDFOS INSTRUCTIONS

Installation and operating instructions



Declaration of Conformity

1: HS pump complete with motor and base frame:

We Grundfos declare under our sole respons ibility that the products HS, towhich this declaration relates, are in conformity with the Council Directiveson the approximation of the laws of the EC Member States relating to

— Machinery (98/37/EC).Standard used: EN 809: 2000.

— Electromagnetic compatibility (2004/108/EC).Standards used: EN 61000-6-2, EN 61000-6-4.

— Electrical equipment designed for use within certain voltage limits(2006/95/EC).Standard used: EN 60034-1: 2004.

2: HS bare shaft pump:

We Grundfos declare under our sole respons ibility that the products HS, towhich this declaration relates, are in conformity with the Council Directiveon the approximation of the laws of the EC Member States relating to

— Machinery (98/37/EC) and fulfils Annex II B.Standard used: EN 809: 2000.

An HS bare shaft pump must not be put into service until the machineryinto which it is incorporated has been declared in conformity with theDirective.

Bjerringbro, 1 April 2008

Svend Aage KaaeTechnical Direc tor

2



CONTENTS

Page

1. Symbols used in this document 3

2. General description 3

3. Delivery and handling 3

3.1 Delivery 33.2 Handling 43.3 Temporary storage 4

4. Applications 4

4.1 Pumped liquids 4

5. Identification 4

5.1 Type key 5

6. Operating conditions 5

6.1 Ambient temperature and altitude 56.2 Liquid temperature 66.3 Pressures in the pump 66.4 Minimum flow rate 66.5 Maximum flow rate 6

7. Mechanical installation 6

7.1 Location 67.2 General installation guidelines 67.3 Foundation 67.4 Vibration dampers 77.5 Expansion joints 7

7.6 Foundation and preliminary alignment procedure 78. Piping 9

8.1 General precautions 98.2 Suction piping 98.3 Valves in suction piping 98.4 Discharge piping 98.5 Auxiliary piping 108.6 Measuring instruments 10

9. Electrical connection 10

9.1 Frequency converter operation 10

10. Start-up 11

10.1 Pre-start checks 1110.2 Priming 1110.3 Starting 12

10.4 Final alignment 1211. Operation 13

11.1 Operating checks 1311.2 Frequency of starts and stops 1311.3 Operating at reduced flow and/or head 13

12. Shutdown 14

12.1 Short-time shutdown 1412.2 Long-term shutdown 14

13. Maintenance 14

13.1 General information 1413.2 Frequency of inspections 1413.3 Lubrication 15

14. Service 15

15. Fault finding 16

16. Installation guidelines 1816.1 Installation at ground level 1816.2 Installation in high-rise buildings 18

17. Suction piping guidelines 19

17.1 Common guidelines 1917.2 Flooded systems 1917.3 Suction lift systems 1917.4 Suction piping if the feed line comes in

different horizontal planes 2017.5 Suction piping with a horizontal elbow in the feed line 2017.6 Installations with vertical suction piping

in confined space 20

18. Disposal 20

1. Symbols used in this document

2. General description

Grundfos type HS horizontal split case pumps version 5 aresupplied either as complete pump with motor, base frame,approved coupling guard and CE mark or as a bare shaft pumpwithout CE-mark.

These instructions apply to both types.

The HS pump can be driven by an electric motor or other type of driver. In the following we assume that the pump is driven by anelectric motor.

3. Delivery and handling

3.1 Delivery

The pump is delivered from factory in a crate or wooden boxspecially designed for transport by fork-lift truck or a similar

vehicle.Upon receipt, check the pump visually to determine whether anydamage has happened during transport or handling. Checkespecially for these points:

1. broken or cracked equipment, including base frame, motor or pump feet and flanges

2. broken motor fan cover, bent eye bolts or damaged terminalbox

3. missing parts.

Parts or accessories are sometimes wrapped individually or fastened to the equipment.

If any damage or losses have occurred, promptly notify Grundfos’representative and the carrier’s agent.

Warning

Prior to installation, read these installation and

operating instructions.

All installations should be performed by

personnel experienced in the placement,

alignment and connection of pumping

equipment.

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!

NoteNotes or instructions that make the job easier

and ensure safe operation.

NoteHS pumps have US theads and dimensions for which inch tools are required.



3.2 Handling

Fig. 1 How to lift and handle HS pumps.

Fig. 2 How to lift and handle HS bare shaft pumps.

3.3 Temporary storage

If the pump is not to be installed and operated soon after arrival,store it in a clean, dry place with slow, moderate changes inambient temperature. Protect the pump from moisture, dust, dirtand foreign bodies. Prior to and during storage we recommendthese precautions:

1. Ensure that the bearings are filled with the recommendedgrease to prevent moisture from entering around the shaft, see13.3 Lubrication .

2. Ensure that suction and discharge ports of the pump and allother openings are covered with cardboard, wood or maskingtape to prevent foreign objects from entering the pump.

3. Cover the unit with a tarpaulin or other suitable covering if it isto be stored where there is no protective covering.

4. Rotate the shaft 2 turns every 2 weeks to prevent corrosion of the bearing surfaces and the stuffing box/shaft seal faces dueto moisture.

4. Applications

Grundfos HS horizontal split case pumps are typically used inthese applications:

• circulation in heating, ventilating, air-conditioning and coolingsystems

• liquid transfer and pressure boosting in various industrialsystems

• liquid transfer in irrigation systems.

4.1 Pumped liquids

Thin, clean and non-aggressive liquids, not containing solidparticles or fibres. Do not pump liquids that will attack the pumpmaterials chemically.

When pumping liquids with a density and/or viscosity higher thanthat of water, head and flow will be reduced. Alternatively, usemotors with correspondingly higher outputs.

The stuffing box packing rings/mechanical shaft seal O-ringschosen must be suitable for the liquid to be pumped.

Special stuffing box packing rings/shaft seal O-rings may berequired if the pump is used for pumping treated water:

• at temperatures above 80 °C (176 °F)

• containing additives to prevent system corrosion, calcareousdeposits, etc. (this may be the case in heating and ventilatingsystems).

When pumping liquids other than water, select an appropriatestuffing box/shaft seal. For further information, please contactGrundfos.

5. Identification

The type designation and rating information of Grundfoshorizontal split case pumps are stated on the nameplate, seefig. 3. The type designation includes serial number, modelnumber, size and type.

Permanent records for this pump are kept under its year-weekcode and serial number (pos. 5 and 6) and this number musttherefore be stated in all correspondence and spare parts orders.

Fig. 3 Nameplate CE-marked HS pump

Warning

Handling should be performed by qualified

personnel.

When unloading the pump, lift equally at four or

more points on the base frame. Do not lift by the

motor or pump. Do not lift by the flanges or by

the eyebolts on the motor.

T M 0 4 0 3

7 9 0 6 0 8

Note Use shackles at all four corners.

T M 0 4 0 3 8 0 0 6

0 8

Warning

Do not exeed the maximum operating

temperature of 90 °C (194 °F).

T M

0 4 0 3 8 5 0 6 0 8

Pos. Description

1 Type designation

2 Model

3 Product number

4 Place of production

5 Production year and week

6 Serial number

7 Maximum pressure and temperature

8 Maximum flow (ensured by motor size)9 Rated flow (duty-point flow)

10 Head at rated f low (duty-point head)

11 Speed

12 Country of production

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5.1 Type key

The type key is an explanation of the product type designation,see fig. 3, pos. 1.

The example shown is an HS 125-100-305/273.1, standard typewith standard coupling, DIN flange, ductile iron pump casing with

bronze impeller, BBVP mechanical shaft seal and clockwisedirection of rotation.

6. Operating conditions

6.1 Ambient temperature and altitude

The ambient temperature and the installation altitude areimportant factors for the motor life, as they affect the life of thebearings and the insulation system.

Ambient temperature must not exceed + 40 °C.

If the ambient temperature exceeds + 40 °C or if the motor isinstalled more than 1000 m above sea level, the motor must notbe fully loaded due to the low density and consequently low

cooling effect of the air. In such cases, it may be necessary to usea motor with a higher output.

Fig. 4 Relationship between motor output (P2) and ambienttemperature

Example:

Fig. 4 shows that the load of the motor must be reduced to 88 %when installed 3500 m above sea level.

At an ambient temperature of 70 °C the load of the motor must bereduced to 78 % of the rated output.

HS 125 -100 -305x /273.1 5/1 F A BBVP 1

Type range

Nominal diameter of suction port

Nominal diameter of

discharge portMaximum impeller diameter (If suffix is used, “x” = differentimpeller design)

Actual impeller diameter

Pump version 5/Pump variant:

/1 = Pump with motor and base frame/2 = Bare shaft pump with base frame/3 = Bare shaft pump.

Code for pipework connection:F = DIN flange (to EN 1092-2)G = ANSI flange (to ANSI 250)

Code for materials (pump casing and impeller):

A = Ductile cast iron pump casing with bronzeimpeller B = Cast iron pump casing with bronze impeller S = Cast iron pump casing with stainless steel

impeller Q =Ductile cast iron pump casing with stainless

steel impeller

Code for shaft seal or stuffing box

Directon of rotation:(Pump direction of rotation as seen from motor end)

1 = Clockwise2 = Counter-clockwise

T M 0 0 2 1 8 9 1 5 9 8

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

50

60

70

80

90

100

[%]

P2

t [°C]

1000 2250 3500 m

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6.2 Liquid temperature

The maximum liquid temperature marked on the pump nameplatedepends on the mechanical shaft seal used.

Temperature range for NBR 0 °C up to + 80 °C

Temperature range for FKM + 15 °C to + 90 °C

6.3 Pressures in the pump

Fig. 5 Pressures in the HS pump

6.3.1 Maximum discharge pressure

6.3.2 Minimum inlet pressure

The minimum inlet pressure must correspond to the NPSH curvefor the pump + a safety margin of minimum 0.5 metres head.

NPSH appears from the data booklet and WebCAPS.

6.3.3 Maximum inlet pressure

Inlet pressure + pump pressure must be lower than max.pressure (p) of the pump. This is stated on the nameplate, seefig. 3, position 7.

6.4 Minimum flow rate

The pump must not run against closed discharge valve as this willcause an increase in temperature/formation of steam in thepump. This may cause shaft damage, impeller erosion, short lifeof bearings, damage to stuffing boxes or mechanical shaft sealsdue to stress or vibration.

The minimum flow rate must be at least 10 % of the max. flowrate stated on the pump nameplate.

6.5 Maximum flow rate

The maximum flow rate must not exceed the value stated on thenameplate. If the maximum flow rate is exceeded, cavitation andoverload may occur.

7. Mechanical installation

7.1 Location

Install the pump with accessibility for inspection andmaintenance. Allow ample space and headroom for the use of anoverhead crane or hoist sufficiently strong to lift the unit.

Fig. 6 HS pump with accessibility for inspection andheadroom for the use of an overhead crane

Install the pump as close as possible to the supply of pumpedliquid, with the shortest and most direct suction pipe practical.

7.2 General installation guidelines

General installation guidelines are shown in section16. Installation guidelines for two installation types:

• installation at ground level

• installation in high-rise buildings.

The installation procedure is basically the same for the twoinstallation types. The attached equipment, such as foundation,valves, expansion joints and lengths and types of pipe are the

same. Whether a vibration damper is to be fitted in ground levelapplications (or not) depends merely on the application. For high-rise applications, a vibration damper must always be fitted.

7.3 Foundation

We recommend that you install the pump on a concretefoundation which is heavy enough to provide permanent and rigidsupport for 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 3-5 timesthe weight of the complete pump unit.

In installations where silent operation is particularly important, werecommend a foundation with a mass up to 5 t imes that of thecomplete pump unit.

T M 0 4 0 0 6 2 4 9 0 7

Warning The maximum discharge pressure is the pressure

(p) stated on the pump nameplate.

Inlet pressure

Pump pressure

Pressure p stated on pump(pressure above atmospheric pressure)

Warning

All installations should be performed by

personnel experienced in the placement,

alignment and connection of pumping

equipment.

T M 0 4 0 3 8 2 0 6 0 8

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7.4 Vibration dampers

As mentioned in 7.2 General installation guidelines , the specificapplication may call for vibration dampers to prevent pumpvibrations from being transmitted to the building or the pipework.In order to select the right vibration damper, you need thisinformation:

• Forces transferred through the damper.

• Motor speed. In the case of speed control, this must also betaken into account.

• Desired dampening in % (recommended value: 70 %).

The selection of vibration damper differs from installation toinstallation. In certain cases a wrong damper may increase thevibration level. Vibration dampers should therefore be sized bythe supplier of the vibration dampers.

7.5 Expansion joints

Expansion joints provide these advantages:

• Absorption of thermal expansion and contraction of pipeworkcaused by variations in liquid temperature.

• Reduction of mechanical influences in connection withpressure surges in the pipework.

• Isolation of structure-borne noise in the pipework (only rubber bellows expansion joints).

The expansion joints should be fitted at a minimum distance of 2pipe diameters (DN) away from the pump f lange on the suctionside. This prevents turbulence in the joints, thus ensuringoptimum suction conditions and minimum pressure drop on thedischarge side.

At flow velocities > 2.4 m/s, we recommend you to fit larger expansion joints matching the pipework.

See figs. 15 and 16 for installation of expansion joints.

7.6 Foundation and preliminary alignment procedure

The foundation and prelilminary alignment procedure has four

steps:1. pouring of foundation

2. shimming of base frame

3. preliminary alignment

4. grouting.

7.6.1 Pouring of foundation

We recommend the following procedure to ensure a goodfoundation.

1. Pour the foundation without interruptions to within 19-32 mmof the final level. Use compactors to ensure that the concreteis evenly distributed. The top surface should be well scoredand grooved before the concrete sets. This provides a bondingsurface for the grout.

2. Embed foundation bolts in the concrete as shown in fig. 7.Allow enough bolt length to reach through grout, shims, lower base frame, nuts and washers.

Fig. 7 Typical foundation bolt design

Let the foundation cure for several days before the base frame isshimmed and grouted.

7.6.2 Shimming of base frame

Fig. 8 Shimming of base frame and leveling of pump

1. Lift/jack up the base frame to the final level 19-32 mm abovethe concrete foundation, and support the base frame bymeans of blocks and shims both at the foundation bolts andmidway between bolts, see fig. 8.

2. Level the base frame by adding or removing shims under thebase frame, see fig. 8.

3. Tighten the foundation bolt nuts against the base frame. Makesure the piping can be aligned to the pump flanges withoutputting strain on pipes or flanges.

CautionDo not fit expansion joints to make up for inaccuracies in the pipework, such as centre

displacement or misalignment of flanges.

T M 0 4 0 3 8 3 0 6 0 8

T M 0 4 0 3 8 1 0 6 0 8

5 - 1 0 m m

Bolt lengthabove base

frame

Thickness of base frame

19 to 32 mmallowance for grout

Base frame

Top of foundationleft rough

Pipe sleeveLugWasher

Wedges and shimsleft in place

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7.6.3 Preliminary alignment

The pump and motor are pre-aligned on the base frame from thefactory. Some deformation of the base frame may occur duringtransport and it is therefore essential to check alignment at theinstallation site prior to final grouting.

A flexible coupling will only compensate for minor misalignmentsand should not be used to compensate for excessivemisalignment of the pump and motor shafts. Inaccurate alignmentresults in vibration and excessive wear on the bearings, shaft or wear rings.

Carry out alignment of the motor by placing shims of differentthickness under the motor. If possible, replace several thin shimswith one thick shim.

The preliminary alignment procedure has four steps:

1. checking coupling clearance

2. checking soft foot on pump and motor

3. checking parallel alignment

4. checking angular alignment.

1. Checking coupling clearance

Check that the gap between the coupling halves is equal to thevalues in the table and that the keyways are 180 ° displaced.

2. Checking soft foot of pump and motorSoft foot is analogous to sitting down at a table and finding thatthe table rocks when someone leans on it. Technically, it is acondition where a pump's/motor’s feet are not in the same planeas its baseplate.

To check for soft foot, set pump/motor on its baseplate and bolt itdown. Set up a dial gauge on one foot, loosen the hold-down bolt,and watch the dial gauge. If the dial gauge indicator moves whileloosening the bolt, the pump/motor has soft foot. The movementmeasured by the dial gauge indicates how many shims areneeded to level the pump/motor. This procedure must berepeated at all four corners.

If the pump has been installed for a long period of time thestresses induced in the pump casing by soft foot can cause

permanent deformation of the casing.3.Checking parallel alignment

Place a straight edge across both coupling rims at the top, thebottom and both sides, see fig. 9. After each adjustment, recheckall features of alignment. Parallel alignment is correct when themeasurements show that all points of the coupling faces arewithin ± 0.2 mm of each other.

Fig. 9 Checking parallel alignment

4. Checking angular alignment

Insert a pair of inside calipers or a taper gauge at four points at90 ° intervals around the coupling, see fig. 10. Angular alignmentis correct when the measurements show that all points of thecoupling faces are within ± 0.2 mm of each other.

Fig. 10 Checking angular alignment

Recheck coupling clearance and tighten the set screws on thecouplings

7.6.4 Grouting

Grouting compensates for uneven foundation, distributes weightof unit, dampens vibrations and prevents shifting. Use anapproved, non-shrinking grout. If you have questions or doubtsabout the grouting, please consult an expert on grouting.

Proceed as follows:

1. Build a strong formwork around the foundation to contain thegrout.

2. Soak top of concrete foundation thoroughly, then removesurface water.

3. Fill the formwork with grout up to the top edge of the baseframe, see fig. 11. Allow grout to dry thoroughly beforeattaching piping to pump (24 hours is sufficient time withapproved grouting procedure).

4. When the grout has thoroughly hardened, check the

foundation bolt nuts and tighten if necessary.5. Approximately two weeks after the grout has been poured, or

when the grout has thoroughly dried, apply an oil base paint tothe exposed edges of the grout to prevent air and moisturefrom getting in contact with the grout.

Fig. 11 Sectional view of foundation with foundation bolt,grouting and base frame

Warning

Before starting work on the pump, make sure that

the electricity supply has been switched off and

that it cannot be accidentally switched on.

CautionCarry out alignment of the motor only as piping

strain will occur if the pump is shifted.

For a coupling with an outside

diameter of ∅ [mm]

the coupling clearance

[mm] must be:

Nominal Tolerance

∅90 to ∅213 3.2 0/–1

∅251 to ∅270 4.8 0/–1

∅306 to ∅757 6.4 0/–1

T M 0 3 0 2 0 9 4 5 0 4

Vertical Horizontal

T M 0 3 0 2 1 3

4 5 0 4

Caution

Unless otherwise specified, the base frame must

be completely filled with grout and the levelling

wedges grouted in place. The product warranty is

void if this instruction is not followed.

T M 0 4 0 3 8 4 0 6 0 8

Vertical Horizontal

5 - 1 0 m m

Base frame

Grout

Levellingwedges or shimsleft in place

Top of foundation(rough)

19 to 32 mmgrout

Formwork

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8. Piping

Suction and discharge pipe

In order to minimise friction losses and hydraulic noise in the

piping, choose piping that is one or two sizes larger than thepump suction and discharge ports. Typically, flow velocitiesshould not exceed 2 m/s (6 ft/sec) for the suction pipe (port) and3 m/s (9 ft/sec) for the discharge pipe (port).

Make sure that the NPSH available (NPSHA) is higher than theNPSH required (NPSHR). NPSH = Net Positive Suction Head.

8.1 General precautions

When installing the piping, observe these precautions:

• Always run the piping direct to the pump.

• Do not move pump to the piping. This could make finalalignment impossible and cause stress to pump flanges andpiping.

• When expansion joints are used in the piping system, fit the joints at a minimum distance of 2 pipe diameters away fromthe pump on the suction side. This prevents turbulence in the joints, thus ensuring optimum suction conditions.

• Install piping as straight as possible and avoid unnecessarybends. Where necessary, use 45 ° or long sweep 90 ° fittingsto reduce friction loss.

• Make sure that all piping joints are tight.

• Where flanged joints are used, ensure that inside diametersmatch properly.

• Remove burrs and sharp edges when making up joints.

• Make sure that the piping does not cause stress or strain inthe pump.

• Provide for expansion of pipe material by means of expansion joints on both sides of the pump.

• Always allow sufficient space/accessibility for maintenanceand inspection.

In section 16. Installation guidelines these pipework guidelinesare incorporated in the illustrations for the two installation types.

8.2 Suction piping

Locate the pump below system level whenever possible. This willfacilitate priming, assure a steady liquid flow and provide apositive suction head.

Many NPSH problems can be avoided if the suction piping isproperly installed. Read section 8.1 General precautions for thesuction piping.

In section 17. Suction piping guidelines , common suction pipinginstallations are illustrated for two situations :

• Flooded systems(closed systems and open systems where the liquid level isabove the pump inlet)

• Suction lift systems(closed systems and open systems where the liquid level isbelow the pump inlet).

8.3 Valves in suction piping

If the pump is operat ing under static suction lift conditions, installa non-return valve in the suction pipe to avoid having to prime thepump each time it is started. The non-return valve should be of the flap type or a foot-valve with a minimum of pressure loss.

8.4 Discharge piping

The discharge pipe is usually preceded by a non-return valve anda discharge isolating/throttle valve. The non-return valve protectsthe pump against excessive back pressure and reverse rotationof the pump and prevents back flow through the pump in case of operational stop or failure of the motor.

In order to minimise friction losses and hydraulic noise in thepipework, flow velocities should not exceed 3 m/s (9 ft/sec) in thedischarge pipe (port).

On long horizontal runs, it is desirable to keep the piping as levelas possible.

Avoid high spots, such as loops as they will collect air and throttlethe system or lead to uneven pumping.

Caution

Protective covers are fitted to the suction and

discharge ports to prevent foreign bodies from

entering the pump during transportation and

installation. Make sure that these covers are

removed from the pump before connecting any

pipes.

Caution

Make sure that both suction and discharge piping

are independently supported near the pump so that no strain is transmitted to the pump when

the flange bolts are tightened. Use pipe hangers

or other supports with necessary spacing to

provide support.

CautionThe sizing and installation of the suction piping

is extremely important.



8.5 Auxiliary piping

8.5.1 Drains

Install drain pipes from pump casing and stuffing boxes to aconvenient disposal point.

8.5.2 Pumps fitted with stuffing boxes

When suction pressure is below ambient pressure, supply thestuffing boxes with liquid to provide lubrication and prevent theingress of air. This is normally achieved via a flushing pipe fromthe pump discharge side to the stuffing box. A control valve or

orifice plate may be fitted in the flushing pipe to control thepressure to the packing gland/stuffing box.

If the pumped liquid is dirty and cannot be used for flushing theseals, we recommend a separate clean, compatible liquid supplyto the stuffing box at 1 bar (15 psi) above the suction pressure.

8.5.3 Pumps fitted with mechanical seals

Seals requiring re-circulation will normally be provided with aflushing pipe from the pump casing.

8.6 Measuring instruments

To ensure continuous monitoring of operation, we recommendyou to install pressure gauges on pump suction and dischargeflanges. The pressure gauge on the suction side must be capableof measuring vacuum.The pressure gauge tappings should onlybe opened for test purposes. The measuring range of thedischarge side pressure gauge should be 20 % above themaximum pump discharge pressure.

When measuring with pressure gauges on the pump flanges,please note that a pressure gauge does not register dynamicpressure (velocity pressure). On HS pumps, the diameters of thesuction and discharge flanges are different which results indifferent flow velocities in the two flanges. Consequently, thepressure gauge on the discharge flange will not show thepressure stated in the technical documentation, but a value which

may be lower.

9. Electrical connection

The electrical connections should be carried out by an authorisedelectrician in accordance with local regulations.

The operating voltage and frequency are marked on the motor nameplate.

Make sure that the motor is suitable for the electricity supply of the installation site.

The electrical connections should be carried out as shown on themotor nameplate or in the wiring diagram on the back of theterminal box cover.

If further information is needed, contact your motor supplier.

9.1 Frequency converter operation

In principle, all three-phase motors can be connected to afrequency converter.

However, frequency converter operation will often expose themotor insulation system to a heavier load and cause the motor tobe more noisy than usual due to eddy currents caused by voltagepeaks.

In addition, large motors driven via a frequency converter will beloaded by bearing currents.

When your pump is operated via a frequency converter, check thefollowing operating conditions:

Caution

When pumping hot liquids, we recommend that

the supply of any external flushing or cooling

liquid is continued after stopping the pump. This

should be done to avoid seal damage.

Warning

Before removing the terminal box cover and

before any removal/dismantling of the pump,

make sure that the electricity supply has been

switched off and that it cannot be accidentally

switched on.

Warning

Whenever powered equipment is being used in

explosive surroundings, the rules and

regulations generally or specifically imposed by

the relevant responsible authorities or trade

organisations must be observed.

Note

If in doubt whether your motor can handle

frequency converter operation, contact your

motor supplier.

Operating

conditionsAction

2-, 4- and 6-polemotors of 45 kWand up

Check that one of the motor bearings iselectrically isolated. Contact Grundfos.

Noise criticalapplications

Fit a dU/dt filter between the motor and thefrequency converter (reduces the voltagepeaks and thus the noise).

Particularly noisecritical applications

Fit a sinusoidal filter.

Cable length Fit a cable that meets the specif icationslaid down by the frequency converter supplier. (The length of the cable betweenmotor and frequency converter affects themotor load).

Supply voltage upto 500 V

Check that the motor is suitable for frequency converter operation.

Supply voltagebetween 500 V and690 V

• Fit a dU/dt filter (reduces the voltagepeaks and thus the noise)or

• check that the motor has reinforcedinsulation.

Supply voltage of 690 V and upwards

• Fit a dU/dt fi lter and

• check that the motor has reinforcedinsulation.



10. Start-up

The start-up procedure for HS pumps has three steps:

1. Pre-start checks, see 10.1 Pre-start checks

2. Priming, see 10.2 Priming

3. Starting, see 10.3 Starting

4. Final alignment, see 10.4 Final alignment

10.1 Pre-start checks

Pre-start checks has four steps:

1. Bearings

2. Stuffing boxes

3. Pressure gauge

4. Direction of rotation

10.1.1 Bearings

Check that all bearings are properly lubricated, see13.3 Lubrication .

10.1.2 Stuffing boxes

Check that the stuffing box packing rings have been properly

tightened.

10.1.3 Pressure gauges

Check that the pressure gauge connections are closed.

10.1.4 Direction of rotation

Direction of rotation is checked in the following way:

1. Remove coupling grid spring to ensure that there is noconnection between pump and motor.

2. Check that the motor shaft can turn freely.

3. Start motor briefly to check direction of rotation.The correctdirection of rotation is indicated by arrows on the pump

housing.

4. If direction of rotation is wrong, correct it by interchanging twophases on the motor.

5. Check direction of rotation again.

6. Reassemble coupling with grid spring and guards.

10.2 Priming

Closed systems or open systems where the liquid level is

above the pump inlet (flooded systems):

The suction pipe and the pump must be filled with liquid andvented before the pump is started. Proceed as follows:

1. Close the discharge isolating/throttle valve and loosen the air vent screw.

2. Slowly open the isolating valve in the suction pipe until asteady flow of liquid runs out of the vent hole.

3. Rotate the shaft by hand (if possible) while priming andventing to free entrapped air from the impeller channels.

4. Tighten the air vent screw and completely open the isolating/

throttle valve(s).Open systems where the liquid level is below the pump inlet

(suction lift systems):

The suction pipe and the pump must be filled with liquid andvented before the pump is started. Proceed as follows:

Suction lift system with foot valve:

1.Close the discharge isolating/throttle valve and open theisolating valve in the suction pipe.

2.Remove the air vent screw and connect a priming device toa drain hole.

3.Fill suction pipe and casing with liquid at a pressure of 1 to 2bar from an external source until the suction pipe and thepump are completely filled with liquid.

4.Rotate the shaft by hand while priming and venting to freeentrapped air from the impeller channels.

5.Refit the air vent screw and tighten securely.

The suction pipe can to some extent be filled with liquid andvented before it is connected to the pump. A priming devicecan also be installed before the pump.

Suction lift system without foot valve:

1. Connect the vent on the top of the pump casing to anexternal vacuum pump priming system.

2. Close the discharge isolating/throttle valve and open theisolating valve in the suction pipe.

3. Open valves between pump and vacuum pump.

4. Start external vacuum pump.

5. Pump until the suction pipe and the pump are completelyfilled with liquid.

6. Rotate the shaft by hand while priming and venting to freeentrapped air from the impeller channels.

7. When liquid runs out of the vacuum pump, stop externalvacuum pump and close valves between pump and vacuumpump.

10.2.1 Opening of valves

1. Open the valves for the flushing liquid to the stuffing boxes.2. Completely open the isolating valve on the suction side of the

pump and leave the discharge isolating/throttle valve partlyopen.

Warning

Do not start the pump until you have gone

through all the pre-start checks.

NoteThis does not apply to pumps with mechanical

shaft seals.

NoteThe direction of rotation of the pump is not

always the same as the flow direction.

Warning

Before interchanging two phases, make sure

that the electricity supply has been switched

off and that it cannot be accidentally switched

on.

NoteIf not primed properly, the pump will not deliver

liquid.

Warning

Pay attention to the direction of the vent hole

and 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

Never let the pump run dry in the hope that it will

prime itself! The pump is not self-priming.

Dry running will cause serious damage to the

stuffing boxes, shaft seals, pump wear rings and

shaft sleeves.



10.3 Starting

1. Start the pump.

2. Vent the pump during starting by slackening the air vent screwuntil a steady stream of liquid runs out of the vent hole.

3. When the piping system has been filled with liquid, slowlyopen the discharge isolating/throttle valve until it is completelyopen.

4. Adjust packing gland (stuffing boxes only).With the pump running, tighten the packing gland to allow aleakage of 40-60 drops per minute. This is required for shaftsleeve lubrication.

Tighten the packing gland evenly to provide uniformcompression on the packing rings.After initial start-up, additional packing rings and adjustmentmay be required until the packing rings are properly seated.

10.4 Final alignment

Proceed like this:

1. Let the pump run until it has reached its operating temperature

under normal operating conditions (approx. 1 hour).2. Remove the coupling guard.

3. Check alignment on the coupling by means of dial gauges, seebelow.

Checking coupling alignment by means of dial gauges

(Alternatively, use laser equipment for f inal alignment).

Start the procedure by removing the coupling grid spring andchecking that the motor shaft and pump shaft can turn freely.

Fig. 12 Dial gauge arrangements;the end view of the coupling is seen from the motor

The coupling alignment procedure has four steps:

1. Parallel alignment - vertically2. Parallel alignment - horizontally

3. Angular alignment- horizontally

4. Angular alignment - vertically.

1. Parallel alignment - vertically

1. Mount dial gauge (2) in position 0 ° (12 o’clock), see fig. 12.

2. Make index lines on the two coupling halves, see fig. 12.3. Set the dial gauge pointer to zero, turn motor and pump shaft

simultaneously until dial gauge is in position 180 ° (6 o’clock)and check that the index lines are still in line.

4. Read dial gauge (2). If dial gauge shows a deflectionexceeding ± 0.2 mm, add or remove shims under the motor until the reading of the dial gauge is within the allowabletolerance of ± 0.2 mm.

2. Parallel alignment - horizontally

1. Turn motor and pump to 270 ° (9 o’clock).

2. Set the dial gauge pointer to zero, turn motor and pump shaftto 90 ° (3 o’clock) and check that the index lines are still inline.

3. Read dial gauge. If dial gauge shows a deflection exceeding± 0.2 mm, move the motor sideways until the reading of thedial gauge is within the allowable tolerance of ± 0.2 mm.

4. Remove dial gauge (2).

3. Angular alignment - horizontally

1. Mount dial gauge (1) in position 90 ° (3 o’clock), see fig. 12.

2. Make index lines on the two coupling halves, see fig. 12.

3. Set the dial gauge pointer to zero, turn motor and pump shaftsimultaneously until dial gauge is in position 270 ° (9 o’clock)and check that the index lines are still in line.

4. Read dial gauge (1). If the dial gauge shows a deflectionexceeding ± 0.2 mm, move the motor sideways until thedeflection is halved.

5. Set the dial gauge pointer to zero, turn motor and pump shaftsimultaneously until dial gauge is in position 90 ° (3 o’clock)

and read dial gauge (1) again.6. Now the reading should be within the allowable tolerance of

± 0.2 mm. If not - repeat the procedure.

Caution

Check that the pump is filled with liquid .

Do NOT let the pump run dry! This may result in

serious damage to stuffing boxes or mechanical

shaft seals, wear rings and shaft sleeves.

Warning

Pay attention to the direction of the vent hole

and 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 run a stuffing box dry, and do not over-

tighten packing gland to eliminate leaking as

the shaft sleeve will become damaged.

CautionMake final alignment by shimming the motor

only.

T M 0 3 0 2 1 0 4 5 0 4

0°

90°

180°

270°

Dial gauge (2) for parallelalignment

Index

line

Dial gauge (1) for angular alignment

(12)

(3)

(6)

(9)

T M 0 3 2 9 3 9 4 9 0 5

T M

0 3 2 9 4 1 4 9 0 5

T M 0 3 2 9 4 2

4 9 0 5

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4. Angular alignment - vertically

1. Turn motor and pump shaft until dial gauge (1) in position 0 °

(12 o’clock).2. Set the dial gauge pointer to zero, turn motor and pump shaft

simultaneously until dial gauge is in position 180 ° (6 o’clock)and check that the index lines are still in line.

3. Read dial gauge (1). If dial gauge shows a deflectionexceeding ± 0.2 mm, add or remove shims under the motor until the deflection is halved.

4. Set the dial gauge pointer to zero, turn motor and pump shaftuntil dial gauge is in position 0 ° (12 o’clock) and read dialgauge (1) again.

5. Now the reading should be within the allowable tolerance of ± 0.2 mm. If not - repeat the procedure.

6. Remove dial gauge (1).

Finish the alignment procedure by refitting and tightening thecoupling.

11. Operation

11.1 Operating checks1. Check pump and piping for leaks.

2. Check and record pressure gauge readings for futurereference.

3. Check the differential pressure. If the differential pressure islower than anticipated, the motor may be overloaded. Seedescription of measuring instruments in section 8.6.

4. Measure motor current consumption and compare the resultwith the rated current stated on the motor nameplate. In theevent of motor overload, throttle the discharge isolating/throttle valve until the motor is no longer overloaded.

5. Check bearings for lubrication and temperature.Normal temperature is 80 °C (176 °F). Maximum temperaturedepends on the type of lubrication, see the lubricationnameplate on the pump.

Stop the pump immediately if any defects are noticed. Do notstart the pump unless defects have been remedied, see 15. Fault

finding . Report immediately to the supplier if it is not possible toremedy the defects.

11.2 Frequency of starts and stops

The recommended maximum number of starts and stops per hour appearing from this table apply to complete pumps with motor supplied by Grundfos:

The grey squares indicate non-existing pump models.

11.3 Operating at reduced flow and/or head

Do not operate the pump at a flow below 10 % of the maximumflow stated on the nameplate or with the discharge isolating/throttle valve closed. Operating the pump under such conditionsmay involve the risk of the pump being overheated. To preventpossible damage, use protective devices such as liquidtemperature relay, bearing temperature relay, low suctionpressure control, etc.

If a pump is operated at reduced head, the flow will increase andthe motor will consume more current than normal. This will resultin overheating of the motor. In such situations, throttle the valve

on the discharge side, instead. If an automatic throttle valve isinstalled, this can be done automatically.

T M 0 3 2 9 4 0 4 9 0 5

Note

Coupling tolerances may differ from coupling make to coupling make. For the standard

coupling the allowable tolerance is ± 0.2 mm. For

other coupling types, please see the coupling

data supplied with the pump.

Warning

To protect personnel from rotating machinery,

always install all guards after installation is

complete and before starting pump!

Note

The operating checks apply both during the start-

up procedure and when checking the pump

during normal operation.

P2

[kW]

Max. starts/stops per hour

2-pole 4-pole 6-pole

1.5 5

2.2

15

3

4

5.5

7.511

10

15

10

18.5

22

5

30

37

45

5

55

5

75

90

110

132

15

160

200

250

2

315

355

2

355

375

400

450

525

600



12. Shutdown

The following shutdown procedures apply to most normalshutdowns. If the pump is to be inoperative for a long time, followstorage procedures in section 12.2 Long-term shutdown .

• Always close the discharge/throttle valve before stopping thepump. Close the valve slowly to prevent hydraulic shock, butmake sure that the pump does not run against closed valve for more than a few seconds!

• Cut off and lock off the power supply to the motor.

12.1 Short-time shutdown• For overnight or temporary shutdown periods under non-

freezing conditions, the pump may remain filled with liquid.Make sure the pump is fully primed before restarting.

• For short or frequent shutdown periods under freezingconditions, keep liquid moving within the pump casing andinsulate or heat the pump exterior to prevent freezing.

12.2 Long-term shutdown

For long shutdown periods or to isolate the pump for maintenance, close the suction and discharge valves. If nosuction valve is fitted and the pump has positive suction head,drain all liquid from the suction pipe to terminate liquid flow intothe pump suction port. If applicable, turn off any external source

of cooling or lubricating liquid to the stuffing boxes/shaft seals.Remove plugs in pump drain and vent tappings, as required, anddrain all liquid from the pump casing. Remove packing glandsand packing rings, if applicable.

Fig. 13 Example of drain plugs

• If freezing conditions will prevail during long shutdown periodsafter draining the pump, blow out all liquid in passages andpockets using compressed air. Freezing of pumped liquid canalso be prevented by filling the pump with antifreeze solution.

• Rotate the shaft by hand monthly to coat bearings withlubricant and delay oxidation and corrosion.

• Where applicable, follow motor manufacturer’s storagerecommendations.

13. Maintenance

13.1 General information

Routine maintenance is essential to maintain the pump in a goodcondition.

A high degree of cleanliness should be maintained during allmaintenance procedures.

13.2 Frequency of inspections

Inspections should be carried out in accordance with the routinemaintenance chart below.

Depending on operation and environmental conditions together with a comparison of previous inspections, the frequency of inspections may be altered to maintain satisfactory operation of the pump.

Between regular maintenance inspections, be aware of signs of motor or pump trouble.

Common symptoms are listed in the fault finding chart, see15. Fault finding .

Correct any trouble immediately and avoid costly repairs andshutdowns.

Warning

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.

T M 0 4 0 3 7 8 0 6 0 8

Warning

Do not use antifreeze if the pump is used for

public/potable water supply.

CautionDo not tighten the air vent screw and refit the

drain plug until the pump is to be used again.

Drain plug, suctionport

Drain plug, pump housingand discharge port

Warning

Before starting work on the pump, make sure that

the electricity supply has been switched off and

that it cannot be accidentally switched on.

Every week a. Visual ly check for leaks.b. Check for vibrations.c. Hand test bearing housing for any sign of

temperature rise.

d. Check correct leaking from stuffing box(approx. 40-60 drops per minute)

Every month Check pump bearing temperature.

Every 6 months a. Check shaft for scores.b. Check alignment of pump and motor.c. Check fixing bolts and tighten, if necessaryd: Check coupling for wear.

Every year a. Check whether the grease in the pumpbearings has hardened.

b. Check rotating assembly for wear.c. Check wear ring clearances.

Warning

Impeller and wear rings may

have sharp edges due to wear.



13.3 Lubrication

Pump bearings

Pump bearings are lubricated prior to delivery.

To refill the bearings with fresh grease, use a grease gun andpress grease through the two lubricating nipples provided.

The relubricating intervals and information on quantity and type of grease are stated on the lubricating plate (if available) on thepump, see fig. 14.

Fig. 14 Lubricating plate

For every 10,000 operating hours or every two years,

• remove bearing housings from pump

• remove old grease

• thoroughly clean bearing housings

• refill bearings with fresh grease

• refit bearing housings in accordance with assembly

instructions.Grease specifications: See Ball bearing grease .

Motor bearings

Lubricate the motor in accordance with the indications on themotor nameplate.

Grease specifications: See Ball bearing grease below.

Ball bearing grease

14. Service

If Grundfos is requested to service the pump, Grundfos must becontacted with details about the pumped liquid, etc. before thepump is returned for service. Otherwise Grundfos can refuse toaccept the pump for service.

NoteHS pump complete: We recommend to apply

grease while pump is running.

Warning

HS bare shaft pump combined with motor not supplied by Grundfos: Do not apply grease while

pump is running, unless a CE-approved coupling

guard is fitted.

T M 0 3 3 7 6 6 0 9 0 6

NoteRelubricate each bearing every 2000 operating

hours with a quantity of 8-12 cm 3 (8-12 ml).

Caution

Do not overgrease!

Too much grease can cause over-heating and

premature bearing failure.

Manufacturer Lubricant

Shell Dolium R

Exxon Polyrex

ChevronSRI grease NLGI 2

Black pearl NLGI 2Philips Polytac

Texaco Polystar RB

9 6 6 1 6 4 0 7

Warning

If a pump has been used for a liquid injurious to

health or toxic, the pump will be classified as

contaminated.

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15. Fault finding

Warning

Before removing the terminal box cover and before any removal/dismantling of the pump, make sure that the

electricity supply has been switched off and that it cannot be accidentally switched on.

Faults Causes

T h e p u m p d e l i v e r s n

o l i q u i d

T h e p u m p d o e s n o t

d e l i v e r e n o u g h l i q u i d

T h e p u m p d o e s n o t

c r e a t e e n o u g h p r e s s

u r e

P u m p l o s e s l i q u i d a f

t e r

r u n n i n g f o r a s h o r t t i

m e

T h e p u m p c o n s u m e s

t o o m u c h p o w e r

M o t o r o v e r l o a d e d

V i b r a t i o n

C a v i t a t i o n n o i s e

P u m p b e a r i n g s o v e r h e a t e d

P u m p o p e r a t e s f o r

a s h o r t t i m e a n d t h e n s t o p s

R e f e r e n c e n u m b e r

t o r e m e d i e s

X XPump not primed, lack of priming liquid,incomplete priming.

1.

X Loss of priming liquid. 2.

X X X X Suction lift/static lift too high. 3.

X XDischarge pressure too high (measured atdischarge port).

4.

X X X Speed too low. 5.

X X Wrong direction of rotation. 6.

X X Impeller completely clogged. 7.

X Suction pipe partially blocked. 8.

X X X X X Air leak in suction pipe or flange. 9.

X X XAir leak in stuffing box (flushing channel may beblocked).

10.

X X X XCavitation; insufficient NPSH(depending on installation).

11.

X X X Impeller or wear rings worn. 12.

X X Defective packing rings. 13.

X

Non-return valve too small or partially obstructed(cross section of non-return valve port should beat least as large as cross section of suction pipe).

14.

X X X Suction pipe not immersed deeply enough. 15.

XImpeller diameter too small (probable cause if none of above causes can be established).

16.

X Obstruction in pump housing. 17.

X X X X Air or gases in liquid. 18.

X X

The actual duty point of the pump lies to the rightof the specified duty point on the pump curve.The result is lower head, higher flow and higher power consumption.

19.

X XViscosity or specific gravity of pumped liquid ishigher than that of water.

20.

X X X X Shaft bent due to damage. 21.

X X X X Mechanical failure of bearing. 22.

X X X Misalignment. 23.

X X Electrical defects. 24.

X X X Speed to high. 25.

X Foundation not rigid enough. 26.

X Lubricating oi l/grease dirty or contaminated. 27.



No. Cause Remedy

1. Pump not primed, lack of priming liquid, incompletepriming.

Fill pump and suction pipe completely with pumped liquid.

2. Loss of priming liquid. Mend possible leaks in suction pipe, joints and fittings; vent pumphousing to remove accumulated air.

3. Suction lift/static lift too high. Reduce the difference in height between the water reservoir/water supply and the pump.

4. Discharge pressure too high. Make sure that valves in discharge pipe are fully open.

5. Speed too low. 1. Make sure the motor receives ful l voltage.2. Make sure the frequency is correct.3. Make sure all phases are connected.

6. Wrong direction of rotation. Compare direction of rotation with directional arrow on pump housing.If required, change direction of rotation by interchanging two phasesin the motor.

7. Impeller completely clogged. Dismantle pump and clean impeller.

8. Suction pipe partially blocked. Remove any obstructions in the suction pipe.

9. Air leak in suction pipe or flange. Replace or repair defective pipe section or flange.

10. Air leak in stuffing box. Clean flushing channel. Replace stuffing box packing rings, if necessary.

11. Cavitation; insuff ic ient NPSH(depending on installation).

1. Increase net positive suction head by placing the pump in a lower position.

2. Pressurise suction vessel.12. Impeller or wear rings worn. Replace impeller and/or wear rings. If necessary, also replace

bearings and shaft.

13. Defective packing rings. Replace packing rings.

14. Non-return valve too small or partially obstructed. Replace or clean non-return valve.

15. Suction pipe not immersed deeply enough. Extend the suction pipe so that the risk of sucking air is eliminated.

16. Impeller diameter too small Check with factory if a larger impeller can be used; if not, reducedischarge pipe friction losses. But be careful not to seriously overloadmotor.

17. Obstruction in pump housing. Dismantle pump and remove obstruction.

18. Air or gases in liquid. Remove gas or air from pumped liquid.

Possibly, see 11) above.

19. The actual duty point of the pump lies to the right of thespecified duty point on the pump curve. The result islower head, higher flow and higher power consumption.

Install an orifice plate immediately after the discharge flange. Theorifice plate will raise the system characteristic/increase the counter pressure thus increasing the head and lowering the flow. The size of the orifice plate must be adapted so that the pressure corresponds tothe required duty point.

20. Viscosity or specific gravity of pumped liquid is higher than that of water.

Use larger motor. Consult factory for recommended size.

Test liquid for viscosity and specific gravity.

21. Shaft bent due to damage. Check deflection of shaft by turning on bearing journals. Totalindicator runout should not exceed 0.05 mm on shaft and 0.1 mm onimpeller wearing surface.Possibly replace shaft.

22. Mechanical failure of bearing and/or impeller. Check bear ings and impeller for damage.Possibly replace bearings or impeller.

23. Misalignment. Realign pump and motor.

24. Electrical defects. Check that voltage and frequency of the electricity supply are correct.Check for possible defects in the motor.Check that the motor is properly ventilated.

25. Speed too high. Check that frequency of electricity supply corresponds to frequencystated on motor nameplate.

26. Foundation not rigid enough. Retighten foundation bolt nuts. Check that foundation was madeaccording to installation and operating instructions.

27. Lubricating oi l/grease di rty or contaminated. 1. Clean bearings and bearing housings according to instruct ions andrelubricate bearings.

2. Check that the V-ring (extended and two-stage, through-boreversions) is working properly.



16. Installation guidelines

16.1 Installation at ground level

Fig. 15 Installation guidelines for a pump installed at groundlevel

16.2 Installation in high-rise buildings

Fig. 16 Installation guidelines for a pump installed in high-risebuildings

A: Expansion joint.

B: Foundation (the weight should be 3-5 times that of thecomplete pump unit).

C: Rigid pipe holders and anchorage.

D: Isolating valve (full-flow type).

E: Discharge isolating/trottle valve.F: Non-return valve/check valve.

G: Grout on top of foundation. The base frame must be filled withgrout to top level, see fig. 11.

H: Vibration damper.

T M 0 3 9 9 1 0 4 8 0 7

≥ 8 X DN in case of flow inlet via ahorizontal elbow, see fig. 24.

T M 0 3 9 9 1 1 4 8 0 7

≥ 8 X DN in case of flow inlet via ahorizontal elbow, see fig. 24.

Note

We recommend you to install pressure gauges on

pump suction and discharge flanges. The

pressure gauge on the suction side must be able

to measure vacuum.



17. Suction piping guidelines

17.1 Common guidelines

Avoid air pockets or turbulence in the suction pipe.

Never use reducers in a horizontal suction pipe as shown in fig. 18. Instead, use an eccentric reducer as illustrated in fig. 17.

17.2 Flooded systems

(Closed systems and open systems where the liquid level is above the pump inlet).

17.3 Suction lift systems

(Closed systems and open systems where the liquid level is below the pump inlet).

Install the suction pipe sloping upwards towards the suction port. Any high point in the pipe will be filled with air and thus prevent proper operation of the pump. When reducing the piping to the suction port diameter, use an eccentric reducer with the eccentric side down toavoid air pockets.

Correct Wrong

T M 0 4 0 0 9 3 4 9 0 7

T M 0 4 0 0 9 2 4 9 0 7

Fig. 17 Correctly mounted reducer Fig. 18 Reducers resulting in air pockets and turbulence

Eccentric reducer

Turbulent flow

Air pocket

Concentric reducer

Correct

T

M 0 4 0 1 4 8 4 9 0 7

Fig. 19 Correctly mounted suction piping

Eccentric reducer

Pipe sloping downtowards pump

Correct Wrong

T M 0 4 0 0 9 8 4 9 0 7

T M 0 4 0 0 9 7 4 9 0 7

Fig. 20 Correctly mounted suction piping Fig. 21 Suction piping resulting in air pockets

Eccentric reducer

Pipe sloping up

towards pump

Eccentric reducer

Air pocket

Pipe sloping downtowards pump

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17.4 Suction piping if the feed line comes in different horizontal planes

Avoid high spots, such as loops, as they will collect air and throttle the system or lead to uneven pumping.

17.5 Suction piping with a horizontal elbow in the feed line

Make sure that the liquid flow is evenly distributed to both sides of the double-suction impellers.There is always an uneven, turbulent flow through an elbow, see below. If an elbow is installed in the suction pipe near the pump in aposition other than vertical, more liquid will enter one side of the impeller than the other. This will result in heavy, unbalanced thrust loadsoverheating the bearings, causing rapid wear and reducing the hydraulic performance.

17.6 Installations with vertical suction piping in confined space

Fig. 26 Suction diffuser (1) in the suction piping

18. Disposal

This product or parts of it must be disposed of in anenvironmentally sound way:

1. Use the public or private waste collection service.

2. If this is not possible, contact the nearest Grundfos companyor service workshop.

Correct Wrong

T M 0 4 0 0 9 5 4 9 0 7

T M 0 4 0 0 9 4 4 9 0 7

Fig. 22 Correctly mounted suction piping Fig. 23 Suction piping resulting in air pockets

Eccentric reducer Eccentric reducer

Air pocket

Correct Wrong

T M

0 4 0 1 5 0 4 9 0 7

T M

0 4 0 1 4 9 4 9 0 7

Fig. 24 Recommended suction pipe installation with a lengthof straight pipe between horizontal elbow and pump.

Fig. 25 Unbalanced loading of a double-suction impeller dueto uneven flow through a horizontal elbow close tothe pump.

DN

1 0 x D N ≥ 10 X DN plus

expansion joint

Uneven flowWater pressureincreases here causinga greater flow to oneside of the impeller thanto the other

T M 0 4 0 0 9 6 4 9 0 7

Subject to alterations.



ArgentinaBombas GRUNDFOS de Argentina S.A.Ruta Panamericana km. 37.500 Lote 34A1619 - GarinPcia. de Buenos AiresPhone: +54-3327 414 444Telefax: +54-3327 411 111

AustraliaGRUNDFOS Pumps Pty. Ltd.P.O. Box 2040Regency ParkSouth Australia 5942Phone: +61-8-8461-4611Telefax: +61-8-8340 0155

AustriaGRUNDFOS Pumpen Vertrieb Ges.m.b.H.Grundfosstraße 2A-5082 Grödig/SalzburgTel.: +43-6246-883-0Telefax: +43-6246-883-30

BelgiumN.V. GRUNDFOS Bellux S.A.Boomsesteenweg 81-83B-2630 Aartselaar Tél.: +32-3-870 7300Télécopie: +32-3-870 7301

BelorussiaПредставительство ГРУНДФОС в Минске220090 Минск ул.Олешева 14Телефон: (8632) 62-40-49Факс: (8632) 62-40-49

Bosnia/HerzegovinaGRUNDFOS Sarajevo

Paromlinska br. 16,BiH-71000 SarajevoPhone: +387 33 713290Telefax: +387 33 231795

BrazilMark GRUNDFOS Ltda.Av. Humberto de Alencar Castelo Branco,630CEP 09850 - 300São Bernardo do Campo - SPPhone: +55-11 4393 5533Telefax: +55-11 4343 5015

BulgariaGRUNDFOS Pumpen VertriebRepresentative Office - BulgariaBulgaria, 1421 SofiaLozenetz District105-107 Arsenalski blvd.Phone: +359 2963 3820, 2963 5653Telefax: +359 2963 1305

CanadaGRUNDFOS Canada Inc.2941 Brighton RoadOakville, OntarioL6H 6C9Phone: +1-905 829 9533Telefax: +1-905 829 9512

ChinaGRUNDFOS Pumps (Shanghai) Co. Ltd.51 Floor, Raffles CityNo. 268 Xi Zang Road. (M)Shanghai 200001PRCPhone: +86-021-612 252 22Telefax: +86-021-612 253 33

CroatiaGRUNDFOS predstavništvo ZagrebCebini 37, BuzinHR-10000 ZagrebPhone: +385 1 6595 400Telefax: +385 1 6595 499

Czech RepublicGRUNDFOS s.r.o.Čajkovského 21779 00 OlomoucPhone: +420-585-716 111Telefax: +420-585-716 299

DenmarkGRUNDFOS DK A/SMartin Bachs Vej 3DK-8850 BjerringbroTlf.: +45-87 50 50 50Telefax: +45-87 50 51 51E-mail: [email protected]/DK

EstoniaGRUNDFOS Pumps Eesti OÜPeterburi tee 92G11415 Tallinn

Tel: + 372 606 1690Fax: + 372 606 1691

FinlandOY GRUNDFOS Pumput ABMestarintie 11FIN-01730 VantaaPhone: +358-3066 5650Telefax: +358-3066 56550

FrancePompes GRUNDFOS Distribution S.A.Parc d’Activités de Chesnes57, rue de MalacombeF-38290 St. Quentin Fallavier (Lyon)Tél.: +33-4 74 82 15 15Télécopie: +33-4 74 94 10 51

GermanyGRUNDFOS GMBHSchlüterstr. 3340699 ErkrathTel.: +49-(0) 211 929 69-0Telefax: +49-(0) 211 929 69-3799e-mail: [email protected] in Deutschland:

e-mail: [email protected] Hellas A.E.B.E.20th km. Athinon-Markopoulou Av.P.O. Box 71GR-19002 PeaniaPhone: +0030-210-66 83 400Telefax: +0030-210-66 46 273

Hong KongGRUNDFOS Pumps (Hong Kong) Ltd.Unit 1, Ground floor Siu Wai Industrial Centre29-33 Wing Hong Street &68 King Lam Street, Cheung Sha WanKowloonPhone: +852-27861706 / 27861741Telefax: +852-27858664

HungaryGRUNDFOS Hungária Kft.Park u. 8H-2045 Törökbálint,Phone: +36-23 511 110Telefax: +36-23 511 111

IndiaGRUNDFOS Pumps India Private Limited118 Old Mahabalipuram RoadThoraipakkamChennai 600 096Phone: +91-44 2496 6800

IndonesiaPT GRUNDFOS PompaJl. Rawa Sumur III, Blok III / CC-1Kawasan Industri, PulogadungJakarta 13930Phone: +62-21-460 6909Telefax: +62-21-460 6910 / 460 6901

IrelandGRUNDFOS (Ireland) Ltd.Unit A, Merrywell Business Park

Ballymount Road Lower Dublin 12Phone: +353-1-4089 800Telefax: +353-1-4089 830

ItalyGRUNDFOS Pompe Italia S.r.l.Via Gran Sasso 4I-20060 Truccazzano (Milano)Tel.: +39-02-95838112Telefax: +39-02-95309290 / 95838461

JapanGRUNDFOS Pumps K.K.Gotanda Metalion Bldg., 5F,5-21-15, Higashi-gotandaShiagawa-ku, Tokyo141-0022 JapanPhone: +81 35 448 1391Telefax: +81 35 448 9619

KoreaGRUNDFOS Pumps Korea Ltd.6th Floor, Aju Building 679-5Yeoksam-dong, Kangnam-ku, 135-916Seoul, KoreaPhone: +82-2-5317 600Telefax: +82-2-5633 725

LatviaSIA GRUNDFOS Pumps LatviaDeglava biznesa centrsAugusta Deglava ielā 60, LV-1035, R ī ga,Tālr.: + 371 714 9640, 7 149 641Fakss: + 371 914 9646

LithuaniaGRUNDFOS Pumps UABSmolensko g. 6LT-03201 VilniusTel: + 370 52 395 430Fax: + 370 52 395 431

MalaysiaGRUNDFOS Pumps Sdn. Bhd.

7 Jalan Peguam U1/25Glenmarie Industrial Park40150 Shah AlamSelangor Phone: +60-3-5569 2922Telefax: +60-3-5569 2866

MéxicoBombas GRUNDFOS de México S.A. deC.V.Boulevard TLC No. 15Parque Industrial Stiva AeropuertoApodaca, N.L. 66600Phone: +52-81-8144 4000Telefax: +52-81-8144 4010

NetherlandsGRUNDFOS NetherlandsVeluwezoom 351326 AE AlmerePostbus 220151302 CA ALMERETel.: +31-88-478 6336

Telefax: +31-88-478 6332e-mail: [email protected]

New ZealandGRUNDFOS Pumps NZ Ltd.17 Beatrice Tinsley CrescentNorth Harbour Industrial EstateAlbany, AucklandPhone: +64-9-415 3240Telefax: +64-9-415 3250

NorwayGRUNDFOS Pumper A/SStrømsveien 344Postboks 235, LeirdalN-1011 OsloTlf.: +47-22 90 47 00Telefax: +47-22 32 21 50

PolandGRUNDFOS Pompy Sp. z o.o.ul. Klonowa 23Baranowo k. PoznaniaPL-62-081 PrzeźmierowoTel: (+48-61) 650 13 00Fax: (+48-61) 650 13 50

PortugalBombas GRUNDFOS Portugal, S.A.Rua Calvet de Magalhães, 241Apartado 1079P-2770-153 Paço de ArcosTel.: +351-21-440 76 00Telefax: +351-21-440 76 90

RomâniaGRUNDFOS Pompe România SRLBd. Biruintei, nr 103Pantelimon county IlfovPhone: +40 21 200 4100Telefax: +40 21 200 4101E-mail: [email protected]

RussiaООО Грундфос

Россия, 109544 Москва, ул. Школьная 39Тел. (+7) 495 737 30 00, 564 88 00Факс (+7) 495 737 75 36, 564 88 11E-mail [email protected]

SerbiaGRUNDFOS Predstavništvo BeogradDr. Milutina Ivkovića 2a/29YU-11000 BeogradPhone: +381 11 26 47 877 / 11 26 47 496Telefax: +381 11 26 48 340

SingaporeGRUNDFOS (Singapore) Pte. Ltd.24 Tuas West RoadJurong TownSingapore 638381Phone: +65-6865 1222Telefax: +65-6861 8402

SloveniaGRUNDFOS PUMPEN VERTRIEBGes.m.b.H.,Podružnica LjubljanaBlatnica 1, SI-1236 TrzinPhone: +386 1 563 5338Telefax: +386 1 563 2098E-mail: [email protected]

SpainBombas GRUNDFOS España S.A.Camino de la Fuentecilla, s/nE-28110 Algete (Madrid)Tel.: +34-91-848 8800Telefax: +34-91-628 0465

SwedenGRUNDFOS ABBox 333 (Lunnagårdsgatan 6)431 24 MölndalTel.: +46(0)771-32 23 00Telefax: +46(0)31-331 94 60

Switzerland

GRUNDFOS Pumpen AGBruggacherstrasse 10CH-8117 Fällanden/ZHTel.: +41-1-806 8111Telefax: +41-1-806 8115

TaiwanGRUNDFOS Pumps (Taiwan) Ltd.7 Floor, 219 Min-Chuan RoadTaichung, Taiwan, R.O.C.Phone: +886-4-2305 0868Telefax: +886-4-2305 0878

ThailandGRUNDFOS (Thailand) Ltd.947/168 Moo 12, Bangna-Trad Rd., K.M.3,Bangna, PhrakanongBangkok 10260Phone: +66-2-744 1785 ... 91Telefax: +66-2-744 1775 ... 6

TurkeyGRUNDFOS POMPA San. ve Tic. Ltd. Sti.Gebze Organize Sanayi BölgesiIhsan dede Caddesi,2. yol 200. Sokak No. 20441490 Gebze/ KocaeliPhone: +90 - 262-679 7979Telefax: +90 - 262-679 7905E-mail: [email protected]

UkraineТОВ ГРУНДФОС УКРАЇНА 01010 Київ, Вул. Московська 8б,Тел.:(+38 044) 390 40 50Фах.: (+38 044) 390 40 59E-mail: [email protected]

United Arab EmiratesGRUNDFOS Gulf DistributionP.O. Box 16768Jebel Ali Free ZoneDubaiPhone: +971-4- 8815 166Telefax: +971-4-8815 136

United KingdomGRUNDFOS Pumps Ltd.Grovebury RoadLeighton Buzzard/Beds. LU7 8TLPhone: +44-1525-850000Telefax: +44-1525-850011

U.S.A.GRUNDFOS Pumps Corporation17100 West 118th TerraceOlathe, Kansas 66061Phone: +1-913-227-3400Telefax: +1-913-227-3500

UsbekistanПредставительство ГРУНДФОС в Ташкенте700000 Ташкент ул.Усмана Носира 1-й тупик 5Телефон: (3712) 55-68-15

Факс: (3712) 53-36-35

Addresses revised 04.03.2008



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