Hydro Multi-BInstallation and operating instructions

GRUNDFOS INSTRUCTIONS

Declaration of conform

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Declaration of conformity

GB: EC declaration of conformityWe, Grundfos, declare under our sole responsibility that the Hydro Multi-B booster systems, to which this declaration relates, are in conformity with these Council directives on the approximation of the laws of the EC member states:— Machinery Directive (2006/42/EC).

Standards used: EN 809:2009 and EN 60204-1:2006.— EMC Directive (2004/108/EC).

Standards used: EN 61000-6-2:2005 and EN 61000-6-3:2007.This EC declaration of conformity is only valid when published as part of the Grundfos installation and operating instructions (publication number 98301927 0912).

ES: Declaración CE de conformidadNosotros, Grundfos, declaramos bajo nuestra entera responsabilidad que los grupos de presión Hydro Multi-B, a los cuales se refiere esta declaración, están conformes con las Directivas del Consejo en la aproximación de las leyes de las Estados Miembros del EM:— Directiva de Maquinaria (2006/42/CE).

Normas aplicadas: EN 809:2009 y EN 60204-1:2006.— Directiva EMC (2004/108/CE).

Normas aplicadas: EN 61000-6-2:2005 y EN 61000-6-3:2007.Esta declaración CE de conformidad sólo es válida cuando se publique como parte de las instrucciones de instalación y funcionamiento de Grundfos (número de publicación 98301927 0912).

FR: Déclaration de conformité CENous, Grundfos, déclarons sous notre seule responsabilité, que les groupes de surpression Hydro Multi-B, auxquels se réfère cette déclaration, sont conformes aux Directives du Conseil concernant le rapprochement des législations des Etats membres CE relatives aux normes énoncées ci-dessous:— Directive Machines (2006/42/CE).

Normes utilisées: EN 809:2009 et EN 60204-1:2006. — Directive Compatibilité Electromagnétique CEM (2004/108/CE).

Normes utilisées: EN 61000-6-2:2005 et EN 61000-6-3:2007.Cette déclaration de conformité CE est uniquement valide lors de sa publication dans la notice d'installation et de fonctionnement Grundfos (numéro de publication 98301927 0912).

PT: Declaração de conformidade CEA Grundfos declara sob sua única responsabilidade que os sistemas de pressurização Hydro Multi-B, aos quais diz respeito esta declaração, estão em conformidade com as seguintes Directivas do Conselho sobre a aproximação das legislações dos Estados Membros da CE:— Directiva Máquinas (2006/42/CE).

Normas utilizadas: EN 809:2009 e EN 60204-1:2006.— Directiva EMC (compatibilidade electromagnética) (2004/108/CE).

Normas utilizadas: EN 61000-6-2:2005 and EN 61000-6-3:2007.Esta declaração de conformidade CE é apenas válida quando publicada como parte das instruções de instalação e funcionamento Grundfos (número de publicação 98301927 0912).

Suzhou, 4th February 2011

Egon Hygom PoulsenDirector, R&D China

GRUNDFOS Pumps (Suzhou) Ltd.No. 72, Qingqiu Road

Suzhou, Jiangsu 215126, China

Person empowered to sign the EC declaration of conformity.

Svend Aage KaaeTechnical Director

Grundfos Holding A/SPoul Due Jensens Vej 7

8850 Bjerringbro, Denmark

Person authorised to compile technical file.

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English (GB) Installation and operating instructions

Original installation and operating instructions.

CONTENTSPage

1. Symbols used in this document

2. Scope of these instructionsThese installation and operating instructions apply to Grundfos Hydro Multi-B booster systems. Hydro Multi-B is a range of factory-assembled booster systems, ready for installation and operation.

1. Symbols used in this document 32. Scope of these instructions 33. Product description 44. Application types 54.1 Hydro Multi-B for constant-pressure applications 54.2 Hydro Multi-B for tank-filling applications 65. Delivery and handling 75.1 Delivery 75.2 Handling 76. Identification 76.1 Nameplate 76.2 Type key 87. Installation 97.1 Mechanical installation 97.2 Electrical installation 108. User interface 109. Startup 1210. Operating modes 1310.1 Local mode, external stop not activated 1310.2 Local mode, external stop activated 1310.3 Remote-controlled, external stop not activated 1410.4 Remote-controlled, external stop activated 1411. Functions 1511.1 General functions 1511.2 Functions for constant-pressure systems 1511.3 Functions for tank-filling systems 1612. Data communication 1613. Fault finding 1714. Maintenance 1814.1 Pumps 1814.2 CU 323 1815. Frost protection 1816. Taking out of operation 1817. Technical data 1817.1 Pressure 1817.2 Temperature 1817.3 Relative humidity 1817.4 Sound pressure level 1818. Electrical data 1919. Related documents 1920. Service 1920.1 Service documentation 1921. Disposal 19

WarningPrior to installation, read these installation and operating instructions. Installation and operation must comply with local regulations and accepted codes of good practice.

WarningThe use of this product requires experience with and knowledge of the product.Persons with reduced physical, sensory or mental capabilities must not use this product, unless they are under supervision or have been instructed in the use of the product by a person responsible for their safety.Children must not use or play with this product.

WarningIf these safety instructions are not observed, it may result in personal injury.

WarningThe surface of the product may be so hot that it may cause burns or personal injury.

CautionIf 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.

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3. Product descriptionAs standard, Hydro Multi-B booster systems consist of two to four CM(E) pumps coupled in parallel and mounted on a common base frame with all the necessary fittings and a control cabinet.

Fig. 1 Front view of Hydro Multi-B booster system

Fig. 2 Back view of Hydro Multi-B booster system

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Pos. Description Quantity

1 Control cabinet 12 Suction manifold 13 Discharge manifold 14 Diaphragm tank 15 Isolating valve 2 per pump6 Non-return valve 1 per pump7 Pump 2-48 Base frame 1

9 Pressure transmitter and pressure gauge 1

10 Pressure switch or inlet pressure sensor 111 Flexible connection 1 per pump12 Screw cap or blanking flange 2

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4. Application typesHydro Multi-B booster systems are available for the following application types:• constant-pressure boosting• tank filling.Furthermore, two control variants of the Hydro Multi-B are available. The control variants are described below.

4.1 Hydro Multi-B for constant-pressure applicationsThe Hydro Multi-B system for constant-pressure applications is designed to maintain a constant pressure on the discharge side of the pumps. Hydro Multi-B systems for constant-pressure applications adjust the performance according to the demand and keep a constant pressure in the following ways:• by cutting the required number of pumps in and out• through continuous adjustment of the speed of the running

CME pumps.

4.1.1 Operating principleThe user enters the required pressure of the system (setpoint) via the user interface of the CU 323 control unit. The CU 323 adjusts the system performance according to the feedback received from the pressure transmitter installed in the discharge manifold.

4.1.2 Control variantsHydro Multi-B systems for constant-pressure applications are available as control variants E and ES.Both systems work as described below.

Control variant E Control variant ES

Two to four electronically speed-controlled CME pumps. One to three mains-operated CM pumps and one speed-controlled CME pump.

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One CME pump in operation. One CME pump in operation.

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Three CME pumps in operation. One CME pump and two CM pumps in operation.

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• Control variant E for constant-pressure applications maintains a constant pressure through continuous adjustment of the speed of the pumps.

• The system performance is adjusted to the demand by cutting the required number of pumps in and out and through parallel control of the pumps in operation.

• Control variant ES for constant-pressure applications maintains a constant pressure through continuous adjustment of the speed of the CME pump. The other pumps are cut in/out according to demand and to achieve a performance corresponding to the consumption.

• The CME pump always starts first and will be the last to stop. If the pressure cannot be maintained by the pump, one or both CM pumps will be cut in.

• Changeover among the mains-operated pumps is automatic and depends on load, time and fault.

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4.2 Hydro Multi-B for tank-filling applicationsThe Multi-B system for tank-filling applications is designed to fill a tank such as a roof tank or a break tank in a controlled manner. The Hydro Multi-B controls the filling either via level switches or a level sensor.

4.2.1 Operating principleThe system has two methods of operation, one based on level switches and the other on a level sensor.

Operation with level switchesThe user adjusts the switches in the tank to the desired stop and start levels.

Operation with level sensorThe user adjusts the setpoint so it corresponds to the real tank height, measured from the bottom of the tank to the top, via the user interface of the CU 323 control unit.

Factory settingStart level: 15 % of setpointStop level: 85 % of setpointHigh-level alarm: 95 % of setpoint.

4.2.2 Control variantsHydro Multi-B systems for tank-filling applications are available as control variants E and ES. Both systems work as described below.

Control variants E and ES

E: Two to four electronically speed-controlled CME pumps ES: One to three mains-operated CM pumps and one speed-controlled CME pump

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Fig. 3 Example of control variant ES

• In tank-filling applications, the Hydro Multi-B fills the tank with focus on protecting the piping and preventing water hammer. When low level in the tank is reached, a CME pump starts by running approximately 75 % of maximum speed in order to slowly and safely fill the pipes. After a while, it increases the speed to 100 %, and the next pump is started. When the tank is full, the pumps stop.

• Systems with more than two pumps will as default set one pump as standby pump.• Changeover among the mains-operated pumps is automatic and depends on load, time and fault.

CME pump starts CM pump starts CM pump stops

CME pump stops

Time

Pump speed

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100 %

75 %

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5. Delivery and handling

5.1 DeliveryThe Hydro Multi-B booster system is delivered in a recyclable packaging, specially designed for transport by fork-lift truck or a similar vehicle.The forks of the fork-lift truck must be at least 2 metres long.

5.2 HandlingHydro Multi-B booster systems must be lifted as shown in fig. 4.During handling, the lifting point should always be above the centre of gravity of the booster system.

Fig. 4 Correct lifting of Hydro Multi-B

When lifting the booster system, only use suitable lifting equipment that is in good condition and approved for the weight. The weight is stated on the nameplate of the booster system.

6. Identification

6.1 NameplateThe nameplate of the booster system is fitted on the base frame.

Fig. 5 Nameplate

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WarningWhen lifting the booster system, never use the eyebolts of the motors.Do not lift the booster system by the manifolds.Do not stand on the manifolds.

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Pos. Description

1 Type designation2 Model3 Supply voltage4 Maximum head in metres5 Rated head in metres6 Rated flow rate in m3/h7 Enclosure class8 Weight in kg9 Motor power in kW for speed-controlled pumps

10 Motor power in kW for mains-operated pumps11-13 Options

14 Country of origin

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6.2 Type key

Code Example Hydro Multi-B ES U /G CME 10-8 A 2 CM 10-8 A 3 x 380 V, 50 Hz

Type range

EES

System variantsTwo to four pumps with integrated frequency converter One pump with integrated frequency converter and one to three mains-operated pumps

-U

Application mode Constant-pressure boostingTank filling

GOM

Manifold/base frame materialStainless steel (EN 1.4301, AISI 304)/mild steel (Q235)Galvanised steel/mild steel (Q235)Other materials

AIG

Number of pumps with integrated frequency converter, pump type and pump materialCast iron (EN-GJL-200)Stainless steel (EN 1.4301/AISI 304)Stainless steel (EN 1.4401/AISI 316)

AIG

Number of mains-operated pumps, pump type and pump materialCast iron (EN-GJL-200)Stainless steel (EN 1.4301/AISI 304)Stainless steel (EN 1.4401/AISI 316)

Supply voltage, frequency

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7. Installation

Before installation, check the following: • Does the booster system correspond to order?• Are all visible parts intact?

7.1 Mechanical installation7.1.1 LocationThe booster system must be installed in a well ventilated room to ensure sufficient cooling of the pumps and the control cabinet.

The booster system must have a 1-metre clearance on all sides for inspection and dismantling.

7.1.2 Pipework

Connect the pipes to the manifolds of the booster system. Either end can be used. Apply sealing compound to the unused end of the manifold, and fit the screw cap. For manifolds with flanges, fit a blanking flange with gasket.It is advisable to install pipe supports for the suction and discharge pipes. See fig. 6.To achieve optimum operation and minimise noise and vibration, it may be necessary to consider vibration dampening of the booster system.Noise and vibration are generated by the rotations in the motor and pump and by the flow in pipework and fittings. The effect on the environment is subjective and depends on correct installation and the state of the other parts of the system.If booster systems are installed in blocks of flats or the first consumer on the line is close to the booster system, it is advisable to fit expansion joints on the suction and discharge pipes to prevent vibration being transmitted through the pipework.

Fig. 6 Example showing the position of expansion joints, pipe supports and mounting bolts

All nuts should be re-tightened prior to start-up.The pipes must be fastened to parts of the building to ensure that they cannot move or be twisted.

7.1.3 FoundationThe booster system should be positioned on an even and solid surface, for instance a concrete floor or foundation. The booster system must be bolted to the floor or foundation.

7.1.4 Vibration dampersTo prevent the transmission of vibrations to buildings, it is advisable to isolate the booster system foundation from building parts by means of vibration dampers.Which is the right damper varies from installation to installation, and a wrong damper may increase the vibration level. Vibration dampers should therefore be sized by the supplier of vibration dampers. If the booster system is installed on a base frame with vibration dampers, expansion joints should always be fitted on the manifolds. This is important to prevent the booster system from "hanging" in the pipework.

7.1.5 Expansion jointsExpansion joints are installed with the following purposes:• to absorb expansions/contractions in the pipework caused by

changing liquid temperature• to reduce mechanical strains in connection with pressure

surges in the pipework• to isolate mechanical structure-borne noise in the pipework

(only rubber bellows expansion joints).

Fit expansion joints at a distance of minimum 1 to 1 1/2 times the nominal flange diameter from the manifold on the suction as well as on the discharge side. This prevents the development of turbulence in the expansion joints, resulting in better suction conditions and a minimum pressure loss on the discharge side.

Fig. 7 Examples of rubber bellows expansion joints without and with limit rods

Expansion joints with limit rods can be used to minimise the forces caused by the expansion joints. Expansion joints with limit rods are always recommended for flanges larger than DN 100.The pipework should be anchored so that it does not stress the expansion joints and the pump. Follow the supplier’s instructions and pass them on to advisers or pipe installers.

WarningInstallation and operation must comply with local regulations and accepted codes of good practice.

CautionThe booster system is not designed for outdoor installation and must not be exposed to direct sunlight.

NoteThe pipework connected to the booster system must be of adequate size.

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Pos. Description

1 Expansion joint2 Pipe support3 Mounting bolts

NoteExpansion joints, pipe supports and mounting bolts shown in fig. 6 above are not supplied with a standard booster system.

NoteAs a rule of thumb, the weight of a concrete foundation should be 1.5 x the weight of the booster system.

NoteExpansion joints must not be installed to compensate for inaccuracies in the pipework such as centre displacement of flanges.

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7.2 Electrical installation

• The electrical installation of the booster system must comply with enclosure class IP54.

• Make sure that the booster system is suitable for the power supply to which it is to be connected.

• Make sure that the wire cross-section corresponds to the specifications in the wiring diagram.

8. User interfaceThe Hydro Multi-B incorporates a CU 323 control unit which enables manual setting and monitoring of the booster system. Figure 8 shows the user interface for a system with four pumps.

Fig. 8 User interface of cabinet and CU 323

WarningThe electrical installation must be carried out by an authorised person in accordance with local regulations and the relevant wiring diagram.

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Pos. Buttons Description

1 Changes the system operating mode between "Normal" and "Stop".

2 Increases the setpoint value.

3 Decreases the setpoint value.

4 Resets all alarms.

5 Changes the operating mode of the individual pumps between "AUTO" and "OFF".Each pump in the system has an Auto/Off button.

6Enables manual operation.Note: If a pump is set to manual operation, it will run at 100 % speed, and the power supply to the CU 323 will be switched off.

7 Switches the power supply to the control cabinet on or off.

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RESET

OFF AUTO

OFF AUTO

OFF AUTO

OFF AUTO

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system runalarm

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* The last pump in operation might have been stopped temporarily by the low-flow stop function.

Pos. Displays Description

8

Setpoint Shows the setpoint.

Tank symbol appearing in tank-filling mode with float switches.

/ setpoint Alternates between tank symbol and setpoint in tank-filling mode with analog input.

External stop: Indicates that the system has been stopped externally via a digital input.

Indicates that the system has been set to "OFF".

Indicates that the system has been set from OFF to ON. "On" is only shown for 3 seconds after which the setpoint will be shown.Indicates that buttons on the CU 323 have been locked automatically. Unlock the buttons by pressing

(Reset) and or (Reset) and for 2 seconds.

Indicates that the system is remote-controlled.

Local: Appears if attempts to change local settings are made while the system is remote-controlled.

9

Measured value Shows the actual, measured value on the discharge side.

Appears in tank-filling mode with float switches.

Appears in case of a primary sensor fault.

/ measured value

Alternates between the actual, measured value on the discharge side and "H.L" when a maximum discharge pressure or a level limit has been exceeded.

Pos. Indicator lights Status Description

10Off Normal state.Red Water shortage fault.

11Off Normal state.

RedPrimary and/or redundant sensor fault.Maximum discharge pressure or level limit has been exceeded.

12(pump LED)

OffThe pump has stopped due to cascade operation.The system is in "OFF" state.The power supply has been switched off.

Red A pump fault has occurred.Green The pump is running.Flashing green The pump is in standby mode or has been stopped by pressing or via remote control.

13 AUTO Yellow The pump is controlled by the CU 323.14 OFF Yellow The pump has been stopped by pressing or via remote control.

Pos. Indicator lights

Status

DescriptionPos. 13:system run

(green)

Pos. 14:alarm(red)

15 and 16

(system LEDs)

Off Off The power supply has been switched off.On Off The system is in normal operation.*

Flashing Off The system has been set to stop.Off On The system has been stopped due to an alarm.On On The system is in normal operation, but there is a warning.*

Flashing On The system has been set to stop, and there is a warning.

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9. Startup

After having carried out the mechanical, electrical and hydraulic installation described in sections 7.1 Mechanical installation and 7.2 Electrical installation, proceed as follows:1. Switch off the main switch on the cabinet front.2. Switch off the circuit breakers (located inside the cabinet) of

all pumps.3. Set the "Auto-Manual" switch (located on the front of the

control cabinet) for all pumps to "Manual".4. Close all pump discharge valves, and prime all pumps.

See installation and operating instructions for the pumps.5. Switch on the main switch.6. Start pump 1 by switching on the relevant circuit breaker.7. Check the direction of rotation of the pump. If the pump

rotates in the wrong direction, interchange two phases of the incoming mains supply.

8. Vent the pump by slowly opening its discharge valve.9. Set the "Auto-Manual" switch for the relevant pump to "Auto".10. Repeat points 6, 8 and 9 for the other pumps in the system.11. Adjust the required setpoint via the CU 323 by pressing or

. In the case of tank filling with level switches, adjust the switches in the tank to the desired start and stop levels.

12. Check that the precharge pressure in the diaphragm tank, if any, is 0.7 times the required discharge pressure (setpoint).

13. Set the system to "On" by pressing .Hydro Multi-B is now in automatic mode and ready for operation.

Caution

A positive inlet pressure is required before start-up and during operation.Do not start the pumps until they have been fully primed.

WarningWhen pumping hot liquids, ensure that persons cannot accidentally come into contact with hot surfaces of the product.

OnOff

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10. Operating modesUser operation depends on the system mode. The system modes are described in the following sections.

10.1 Local mode, external stop not activatedIn this mode, the system is locally controlled, and the external stop via digital input is not activated.The flow charts below show examples of how settings can be made.

Starting and stopping the system

Changing the setpoint while the system is running

Changing the setpoint while the system is in "OFF" mode

10.2 Local mode, external stop activatedIn this mode, the system is locally controlled, and the external stop via digital input is activated.External stop via digital input has higher priority than local control. This means that settings can be changed locally, but they will not be effective until external stop has been deactivated. The flow charts below show examples of how settings can be made.

Starting and stopping the system

Changing the setpointTM

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OFF OFFON 3.5OnOff OnOffStarting the system Stopping the system

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Changing the setpoint

OFF 3.53.6

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Changing the setpoint

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E.st

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OFF

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ON

OnOff

OnOff

OnOff

Starting the system

Stopping the system

Note If the buttons are not touched for 3 seconds, the CU 323 will revert to the initial display.

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Changing the setpoint

or

Note If the buttons are not touched for 3 seconds, the CU 323 will revert to the initial display.

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10.3 Remote-controlled, external stop not activatedIn this mode, the system is remote-controlled, and the external stop via digital input is not activated. If local settings are to be changed, follow the flow chart examples below.

10.4 Remote-controlled, external stop activatedIn this mode, the system is remote-controlled, and the external stop via digital input is activated.If local settings are to be changed, follow the flow chart examples below.

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Keep pressed for 3 seconds

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OFF

OnOff

BUS LOC

OnOff

See section 10.1 for changing settings in local mode.or

or or

or or

Note If the buttons are not touched for 3 seconds, the CU 323 will revert to the initial display.

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BUS LOCE.st

OnOff

OnOff

Keep pressed for 3 seconds

See section 10.2 for changing settings in local mode.

or or

or or

Note If the buttons are not touched for 3 seconds, the CU 323 will revert to the initial display.

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11. FunctionsHydro Multi-B booster systems include application-optimised software.

11.1 General functions11.1.1 Dry-running protection (optional)

To protect the pumps against damage from dry running,the Hydro Multi-B incorporates a water shortage function. This function is based on the monitoring of the inlet pressure or the level in a possible tank on the suction side.The pressure or level can be monitored by one of the following:• pressure switch• float switch• level switch• external electrode relay• analog sensor.

Dry-running protection with pressure switch, float switch, level switch or external electrode relaySet the monitoring device to the desired limit. If water shortage is detected for more than 5 seconds, the system will stop, and the indicator light illuminates. Press when the water supply has been re-established.

Dry-running protection with analog sensorThe limit for the minimum inlet pressure in the suction manifold is a factory-set value which can only be changed by a Grundfos service engineer. If the sensor output is below the limit for minimum inlet pressure for more than 5 seconds, the system will stop, and the indicator light illuminates. Press when the water supply has been re-established.

11.1.2 Automatic pump changeoverThe automatic pump changeover function ensures an equal number of operating hours of the pumps, but it also ensures that, in case of an alarm on one pump, another pump is automatically started.There are three types of automatic pump changeover:• operation-dependent pump change• alarm-dependent pump change• time-dependent pump change.

Operation-dependent pump changeIn an ES-system, the CME pump has higher priority than the mains-operated pumps and will always be the first pump to start and the last to stop. The mains-operated pumps in an ES-system will operate alternately as described above.At increasing demand, the pump with the lowest number of operating hours will be started first. At decreasing demand, the pump with the highest number of operating hours will be stopped first.

Alarm-dependent pump change If a pump stops due to an alarm, the CU 323 will send a stop command to the pump to prevent auto-restarting and start another pump which is ready to start and which has the lowest number of operating hours.

Time-dependent pump changeIn certain applications, the demand remains constant for long periods and does not require all pumps to run. In such situations, pump changeover does not take place naturally, and forced pump changeover may thus be required.Once every 24 hours, the CU 323 checks if any of the running pumps has a higher number of operating hours than the pumps that are stopped. If this is the case, the pump will be stopped, and a pump with a lower number of operating hours will start.

11.1.3 Minimum time between start and stopThis function ensures a delay between the start/stop of one pump and the start/stop of another pump. The purpose is to prevent hunting when pumps start and stop continuously.

11.2 Functions for constant-pressure systems11.2.1 Pump cascade controlThe cascade function ensures that only the required number of pumps is running. This means that the number of running pumps always corresponds to the required flow at the entered setpoint. The first pump is started if the pressure at the discharge manifold is below the setpoint.If the first pump is not able to keep the discharge pressure at the setpoint, and the minimum time between start/stop has passed, another pump is started.During the start and stop of a pump, the speed of the speed-controlled pump is controlled in such way that the pressure disturbance is kept as low as possible.At decreasing demand, pumps will be stopped if the pressure rises above the setpoint. Pumps will not be stopped until the minimum time between start/stop has passed.

The last pump in operationIf only one pump is operating, this pump can be operated in energy-saving on/off mode. See section 11.2.4 Low-flow operation.The number of possible starts/stops per hour for all pumps is limited by the maximum number of starts per hour.

11.2.2 Standby pumpsThis function is optional and available on request. The function makes it possible to limit the maximum performance of the Hydro Multi-B by selecting one or more pumps as standby pumps.If a three-pump system has one standby pump, maximum two pumps are allowed to operate at a time.If one of the two pumps in operation has a fault and is stopped, the standby pump will be started. The performance of the booster system is thus not reduced.The status as standby pump alternates between all pumps. Contact Grundfos for further information.

11.2.3 Maximum pressure exceededThis function protects the piping on the discharge side of the booster system against damaging high pressures. The pressure is monitored, and if the pressure is higher than 1.5 bar above the setpoint for more than 5 seconds, the pumps are stopped, the indicator light illuminates, and the display indicates high limit

.When the pressure falls below the setpoint, the system will automatically restart.

Caution When a pump is running in manual mode, it is not protected against dry running.

Note

If the CME pump in an ES-system is stopped due to an alarm, the system will function as an S-system. See section 11.2.5 S-system mode (start/stop band).

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Note

If the system is stopped due to an alarm, the minimum time between start and stop will be ignored, and the pumps will be stopped immediately.

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11.2.4 Low-flow operationWhen only one pump is operating due to cascade, the Hydro Multi-B will regularly check for low flow by decreasing the pump speed.When low flow is detected, the Hydro Multi-B will change its mode of operation to "low-flow operation" and run in on/off mode as described below.In on/off mode, the system has two phases: • Off phase

Water is drawn from the diaphragm tank until the pressure of the system reaches the lower limit of the on/off band (Pset - 0.5 x on/off band).

• Boosting phaseThe pump runs at 100 % speed until the pressure reaches the upper limit of the on/off band (Pset + 0.5 x on/off band).

Fig. 9 On/off operation

11.2.5 S-system mode (start/stop band)S-system mode is only auto-enabled in an ES-system if the CME pump is out of operation due to a fault.

Fig. 10 Start/stop band

11.3 Functions for tank-filling systems11.3.1 Cascade controlThe cascade control function for tank-filling systems is designed to fill the tank with focus on protecting the piping and preventing water hammer. The cascade is time-dependent and starts and stops the pumps in a pre-defined sequence. See fig. 3 on page 6.

11.3.2 Standby pumpsSystems with more than two pumps will as default set one pump as standby pump. The status as standby pump alternates to ensure that all pumps have equal numbers of operating hours. In ES-systems, the CME pump cannot be a standby pump.

11.3.3 Maximum level exceededThis function protects against the risk of overfilling the tank. The level is monitored and if the level is higher than 95 % of the height of the tank, the pumps are stopped, and the display indicates high limit , and the indicator light illuminates.

12. Data communicationThe CU 323 must have a CIM module (Communication Interface Module) fitted to be able to transfer data to the SCADA system or to a mobile phone.Various CIM modules are available, depending on the type of network. See the Hydro Multi-B data booklet or contact Grundfos for further information regarding CIM modules.

TM03

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3607

Stop = Hset + 0.5 x on/off bandStart = Hset - 0.5 x on/off band

Stop

Start

H [m]

Time [sec.]

A B C B C

A: Normal operationB: Pressure boostingC: Stop

Start/stop bandHset

Time [sec.]

H [m]

Pump stops

Pump starts

H.L PT

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13. Fault finding

WarningBefore making any connections in pumps, terminal boxes or control cabinet, make sure that the power supply has been switched off for at least 5 minutes and that it cannot be accidentally switched on.

Fault Possible cause Remedy

The pumps are not running.

Current pressure is higher than or equal to the setpoint.

Wait until the pressure has dropped, or lower the pressure on the discharge side of the Hydro Multi-B, and check that the pumps start.

Power supply disconnected. Connect the power supply.Main switch cut out. Cut in the main switch.Main switch is defective. Replace the main switch.Motor protection is activated. Contact Grundfos.Motor is defective. Repair or replace the motor.

Pressure transmitter fault:• Pressure transmitter is defective.

Replace the pressure transmitter.0-10 bar or 0- 6 bar transmitters with 0-10 V, 0-20 mA or 4-20 mA output signals are monitored by the Hydro Multi-B.

Cable is broken or short-circuited. Repair or replace the cable.

The pumps start, but stop immediately.The operating pressure is not reached. Water shortage or no inlet pressure.

Re-establish the supply of water to the Hydro Multi-B. When the inlet pressure has been re-established, press [Reset] to restart the system.

The Hydro Multi-B is stopped and cannot restart.

Pressure transmitter fault:• Pressure transmitter is defective.

Replace the pressure transmitter.0-10 bar or 0-16 bar transmitters with 0-10 V, 0-20 mA or 4-20 mA output signals are monitored by the Hydro Multi-B.

Cable is broken or short-circuited. Repair or replace the cable.CU 323 fault:• Power supply is disconnected.

Connect the power supply.

The CU 323 is defective. Contact Grundfos.

Unstable water supply from the Hydro Multi-B.

Inlet pressure is too low. Check the suction pipe and the suction strainer, if any.Suction pipe or pumps partly blocked by impurities. Clean the suction pipes, strainer or pumps.

Pumps suck air. Check the suction pipe for leakages.Pressure transmitter defective. Replace the transmitter.

Pumps are running, but deliver no water.

The valves are closed. Open the valves.Suction pipe or pumps blocked by impurities. Clean the suction pipe or pumps.

Non-return valve blocked in closed position. Clean the non-return valve. The non-return valve must move freely.Suction pipe leaky. Check the suction pipe for leakages.

Air in suction pipe or pumps. Vent and prime the pumps. Check the suction pipe for leakages.

The Hydro Multi-B is unable to reach the setpoint.

Too high consumption.• Reduce consumption, if possible. • Install a bigger Hydro Multi-B booster

system.Too many standby pumps selected. Reduce the number of standby pumps.

Pipe fracture or leakage in the system. Check the system, and repair damages, if necessary.Leakage from the shaft seal. Shaft seal is defective. Replace the shaft seal.

Noise. The pumps are cavitating. Clean the suction pipe/pumps and possibly the suction strainer.Very frequent starts and stops. Wrong diaphragm tank precharge pressure. Set correct precharge pressure.

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14. Maintenance

14.1 PumpsThe internal pump parts are maintenance-free. It is important to keep the motor clean in order to ensure adequate cooling of the motor. If the pump is installed in dusty environments, it must be cleaned and checked regularly. Take the enclosure class of the motor into account when cleaning.The motor has maintenance-free, greased-for-life bearings.

14.2 CU 323The CU 323 is maintenance-free. It must be kept clean and dry. Protect it against direct sunlight. Furthermore, the CU 323 must not be outside the ambient temperature range. See section 17. Technical data.

15. Frost protectionPumps which are not being used during periods of frost should be drained to avoid damage. Follow the instructions below:1. Close the isolating valves before and after the pump.2. Remove the filling and drain plugs.3. Remember to open the isolating valves and refit the plugs

before the pump is put into operation again.

Do not fit the filling and drain plugs until the pump is to be used again.

16. Taking out of operationSwitch off the main switch to take the booster system out of operation.

Individual pumps are taken out of operation by switching off the corresponding motor-protective circuit breaker, automatic circuit breaker or fuse.

17. Technical data

17.1 PressureInlet pressure

Calculation of the inlet pressure is recommended in these cases:• Water is drawn through long pipes.• Inlet conditions are poor.

To avoid cavitation, make sure that there is a minimum inlet pressure on the suction side of the booster system. The minimum inlet pressure in bar can be calculated as follows:ps > Hv + ρ x g x 10-5 x NPSH + Hs - pbps = The required minimum inlet pressure in bar read from

a pressure gauge on the suction side of the booster system.

Hv = Vapour pressure of the pumped liquid in bar.ρ = Density of the pumped liquid in kg/m3.g = Gravitational acceleration in m/s2.NPSH = Net Positive Suction Head in metres head.

NPSH can be read from the NPSH curve at the maximum performance at which the pump will run.See installation and operating instructions for CM pumps.

Hs = Safety margin = minimum 0.1 bar.pb = Barometric pressure in bar. Normal barometric

pressure is 1.013 bar.

Maximum inlet pressureThe actual inlet pressure plus the pressure when the pump is operating against a closed valve should always be lower than the maximum system pressure.

Operating pressureAs standard, the maximum operating pressure is 16 bar.

17.2 TemperatureLiquid temperature: 0 °C to +60 °C.Ambient temperature: 0 °C to +40 °C.

17.3 Relative humidityMaximum 95 %.

17.4 Sound pressure levelFor sound pressure level, see installation and operating instructions for the CM pumps.The sound pressure level for a number of pumps can be calculated as follows:Lmax. = Lpump + (n - 1) x 3Lmax. = Maximum sound pressure levelLpump = Sound pressure level for one pumpn = Number of pumps.

WarningBefore starting work on the pumps, make sure that the power supply has been switched off. Lock the main switch with a padlock to ensure that it cannot be accidentally switched on.

WarningEnsure that the escaping water does not cause injury to persons or damage to the motor or other components. In hot-water installations, special attention should be paid to the risk of injury caused by scalding hot water.

WarningThe conductors in front of the main switch are still energised. Lock the main switch with a padlock to ensure that it cannot be accidentally switched on.

Caution A positive inlet pressure is required before start-up and during operation.

Note

In this manual, the term "inlet pressure" is defined as the pressure/vacuum which can be measured immediately before the booster system.

NoteConsidering the flow in pipes, vibrations, etc., the actual sound pressure level of the Hydro Multi-B system will be lower than 90 dB(A).

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18. Electrical dataSupply voltageSee Hydro Multi-B nameplate.

Digital inputs

Analog inputs

Digital outputs (relay outputs)

All digital outputs are potential-free relay contacts.

Inputs for PTC sensor/thermal switchFor PTC sensors to DIN 44082. Thermal switches can also be connected.

19. Related documentsFurther product information about Hydro Multi-B booster systems can be found in the following documents.All documents are available on www.grundfos.com > International website > WebCAPS.

* Only relevant for Hydro Multi-B booster systems, variants E and ES.

** A wiring diagram is supplied with the booster system.

20. Service

20.1 Service documentationService documentation is available on www.grundfos.com > International website > WebCAPS > Service.If you have any questions, please contact the nearest Grundfos company or service workshop.

21. DisposalThis product or parts of it must be disposed of in an environmentally sound way:1. Use the public or private waste collection service.2. If this is not possible, contact the nearest Grundfos company

or service workshop.

Subject to alterations.

Open-circuit voltage 24 VDCClosed-circuit current 5 mA, DCFrequency range 0-4 Hz

NoteAll digital inputs are supplied with PELV voltage (Protective Extra-Low Voltage).

Input current and voltage0-20 mA4-20 mA0-10 V

Tolerance ± 3.3 % of full scaleRepetitive accuracy ± 1 % of full scaleInput resistance, current < 250 ΩInput resistance, voltage 10 kΩ ± 10 %

Supply to sensor 24 V, maximum 50 mA per sensor, short-circuit-protected

NoteAll analog inputs are supplied with PELV voltage (Protective Extra-Low Voltage).

Normally open contacts(DO1, DO2 and DO3) C, NO

Normally closed contacts(DO4 and DO5) C, NC, NO

Maximum contact load 240 VAC, 2 AMinimum contact load 5 VDC, 10 mA

NoteSome outputs have a common C terminal. For further information, see the wiring diagram supplied with the Hydro Multi-B.

Open-circuit voltage 8 VDC ± 15 %Closed-circuit current 1.7 mA, DC

NoteInputs for PTC sensors are electrically separated from the other inputs and outputs of the Hydro Multi-B.

Title Frequency[Hz]Publication

number

Data booklets

Grundfos Hydro Multi-B 50/60 97896424

Installation and operating instructions

CM 50/60 95121197CRE, CRIE, CRNE, CRKE, SPKE, MTRE, CME* 50/60 96564245

CU 323 50/60 97775216Diaphragm tank - 96550312

Service documentation

Service instructions 50/60 97916525Service kit catalogue 50/60 96488862

Other documentation

** - -

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ArgentinaBombas GRUNDFOS de Argentina S.A.Ruta Panamericana km. 37.500 Centro Industrial Garin1619 Garín Pcia. de B.A.Phone: +54-3327 414 444Telefax: +54-3327 45 3190

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

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

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

BelarusПредставительство ГРУНДФОС в Минске220125, Минскул. Шафарнянская, 11, оф. 56, БЦ «Порт»Тел.: +7 (375 17) 286 39 72/73Факс: +7 (375 17) 286 39 71E-mail: minsk@grundfos.com

Bosna and HerzegovinaGRUNDFOS SarajevoZmaja od Bosne 7-7A,BH-71000 SarajevoPhone: +387 33 592 480Telefax: +387 33 590 465www.ba.grundfos.come-mail: grundfos@bih.net.ba

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

BulgariaGrundfos Bulgaria EOODSlatina DistrictIztochna Tangenta street no. 100BG - 1592 SofiaTel. +359 2 49 22 200Fax. +359 2 49 22 201email: bulgaria@grundfos.bg

CanadaGRUNDFOS Canada Inc. 2941 Brighton Road Oakville, Ontario L6H 6C9 Phone: +1-905 829 9533 Telefax: +1-905 829 9512

ChinaGRUNDFOS Pumps (Shanghai) Co. Ltd.50/F Maxdo Center No. 8 XingYi Rd.Hongqiao development ZoneShanghai 200336PRCPhone: +86 21 612 252 22Telefax: +86 21 612 253 33

CroatiaGRUNDFOS CROATIA d.o.o.Buzinski prilaz 38, BuzinHR-10010 ZagrebPhone: +385 1 6595 400 Telefax: +385 1 6595 499www.hr.grundfos.com

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

DenmarkGRUNDFOS DK A/S Martin Bachs Vej 3 DK-8850 Bjerringbro Tlf.: +45-87 50 50 50 Telefax: +45-87 50 51 51 E-mail: info_GDK@grundfos.comwww.grundfos.com/DK

EstoniaGRUNDFOS Pumps Eesti OÜPeterburi tee 92G11415 TallinnTel: + 372 606 1690Fax: + 372 606 1691

FinlandOY GRUNDFOS Pumput AB Mestarintie 11 FIN-01730 Vantaa Phone: +358-(0)207 889 900Telefax: +358-(0)207 889 550

FrancePompes GRUNDFOS Distribution S.A. Parc d’Activités de Chesnes 57, rue de Malacombe F-38290 St. Quentin Fallavier (Lyon) Tél.: +33-4 74 82 15 15 Télécopie: +33-4 74 94 10 51

GermanyGRUNDFOS GMBHSchlüterstr. 3340699 ErkrathTel.: +49-(0) 211 929 69-0 Telefax: +49-(0) 211 929 69-3799e-mail: infoservice@grundfos.deService in Deutschland:e-mail: kundendienst@grundfos.de

HILGE GmbH & Co. KGHilgestrasse 37-4755292 Bodenheim/RheinGermanyTel.: +49 6135 75-0Telefax: +49 6135 1737e-mail: hilge@hilge.de

GreeceGRUNDFOS Hellas A.E.B.E. 20th km. Athinon-Markopoulou Av. P.O. Box 71 GR-19002 Peania Phone: +0030-210-66 83 400 Telefax: +0030-210-66 46 273

Hong KongGRUNDFOS Pumps (Hong Kong) Ltd. Unit 1, Ground floor Siu Wai Industrial Centre 29-33 Wing Hong Street & 68 King Lam Street, Cheung Sha Wan Kowloon Phone: +852-27861706 / 27861741 Telefax: +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 Pompa Jl. Rawa Sumur III, Blok III / CC-1 Kawasan Industri, Pulogadung Jakarta 13930 Phone: +62-21-460 6909 Telefax: +62-21-460 6910 / 460 6901

IrelandGRUNDFOS (Ireland) Ltd. Unit A, Merrywell Business ParkBallymount Road LowerDublin 12 Phone: +353-1-4089 800 Telefax: +353-1-4089 830

ItalyGRUNDFOS Pompe Italia S.r.l. Via Gran Sasso 4I-20060 Truccazzano (Milano)Tel.: +39-02-95838112 Telefax: +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 Latvia Deglava biznesa centrsAugusta Deglava ielā 60, LV-1035, Rīga,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

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

NetherlandsGRUNDFOS NetherlandsVeluwezoom 351326 AE AlmerePostbus 220151302 CA ALMERE Tel.: +31-88-478 6336 Telefax: +31-88-478 6332E-mail: info_gnl@grundfos.com

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

NorwayGRUNDFOS Pumper A/S Strømsveien 344 Postboks 235, Leirdal N-1011 Oslo Tlf.: +47-22 90 47 00 Telefax: +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

RomaniaGRUNDFOS Pompe România SRLBd. Biruintei, nr 103 Pantelimon county IlfovPhone: +40 21 200 4100Telefax: +40 21 200 4101E-mail: romania@grundfos.ro

RussiaООО Грундфос Россия109544, г. Москва, ул. Школьная, 39-41, стр. 1Тел. (+7) 495 564-88-00 (495) 737-30-00Факс (+7) 495 564 88 11E-mail grundfos.moscow@grundfos.com

Serbia Grundfos Srbija d.o.o.Omladinskih brigada 90b11070 Novi Beograd Phone: +381 11 2258 740Telefax: +381 11 2281 769www.rs.grundfos.com

SingaporeGRUNDFOS (Singapore) Pte. Ltd.25 Jalan Tukang Singapore 619264 Phone: +65-6681 9688 Telefax: +65-6681 9689

SloveniaGRUNDFOS d.o.o.Šlandrova 8b, SI-1231 Ljubljana-ČrnučePhone: +386 31 718 808Telefax: +386 (0)1 5680 619E-mail: slovenia@grundfos.si

South AfricaGRUNDFOS (PTY) LTDCorner Mountjoy and George Allen RoadsWilbart Ext. 2Bedfordview 2008Phone: (+27) 11 579 4800Fax: (+27) 11 455 6066E-mail: lsmart@grundfos.com

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

SwedenGRUNDFOS AB Box 333 (Lunnagårdsgatan 6) 431 24 Mölndal Tel.: +46 31 332 23 000Telefax: +46 31 331 94 60

SwitzerlandGRUNDFOS Pumpen AG Bruggacherstrasse 10 CH-8117 Fällanden/ZH Tel.: +41-44-806 8111 Telefax: +41-44-806 8115

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

ThailandGRUNDFOS (Thailand) Ltd. 92 Chaloem Phrakiat Rama 9 Road,Dokmai, Pravej, Bangkok 10250Phone: +66-2-725 8999Telefax: +66-2-725 8998

TurkeyGRUNDFOS POMPA San. ve Tic. Ltd. Sti.Gebze Organize Sanayi Bölgesi Ihsan dede Caddesi,2. yol 200. Sokak No. 20441490 Gebze/ KocaeliPhone: +90 - 262-679 7979Telefax: +90 - 262-679 7905E-mail: satis@grundfos.com

UkraineБізнес Центр ЄвропаСтоличне шосе, 103м. Київ, 03131, Україна Телефон: (+38 044) 237 04 00 Факс.: (+38 044) 237 04 01E-mail: ukraine@grundfos.com

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

United KingdomGRUNDFOS Pumps Ltd. Grovebury Road Leighton Buzzard/Beds. LU7 4TL Phone: +44-1525-850000 Telefax: +44-1525-850011

U.S.A.GRUNDFOS Pumps Corporation 17100 West 118th TerraceOlathe, Kansas 66061Phone: +1-913-227-3400 Telefax: +1-913-227-3500

UzbekistanGrundfos Tashkent, Uzbekistan The Repre-sentative Office of Grundfos Kazakhstan in Uzbekistan38a, Oybek street, TashkentТелефон: (+998) 71 150 3290 / 71 150 3291Факс: (+998) 71 150 3292

Addresses Revised 11.03.2014

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English (GB)1. Symbols used in this document2. Scope of these instructions3. Product description4. Application types4.1 Hydro Multi-B for constant-pressure applications4.1.1 Operating principle4.1.2 Control variants

4.2 Hydro Multi-B for tank-filling applications4.2.1 Operating principle4.2.2 Control variants

5. Delivery and handling5.1 Delivery5.2 Handling

6. Identification6.1 Nameplate6.2 Type key

7. Installation7.1 Mechanical installation7.1.1 Location7.1.2 Pipework7.1.3 Foundation7.1.4 Vibration dampers7.1.5 Expansion joints

7.2 Electrical installation

8. User interface9. Startup10. Operating modes10.1 Local mode, external stop not activated10.2 Local mode, external stop activated10.3 Remote-controlled, external stop not activated10.4 Remote-controlled, external stop activated

11. Functions11.1 General functions11.1.1 Dry-running protection (optional)11.1.2 Automatic pump changeover11.1.3 Minimum time between start and stop

11.2 Functions for constant-pressure systems11.2.1 Pump cascade control11.2.2 Standby pumps11.2.3 Maximum pressure exceeded11.2.4 Low-flow operation11.2.5 S-system mode (start/stop band)

11.3 Functions for tank-filling systems11.3.1 Cascade control11.3.2 Standby pumps11.3.3 Maximum level exceeded

12. Data communication13. Fault finding14. Maintenance14.1 Pumps14.2 CU 323

15. Frost protection16. Taking out of operation17. Technical data17.1 Pressure17.2 Temperature17.3 Relative humidity17.4 Sound pressure level

18. Electrical data19. Related documents20. Service20.1 Service documentation

21. Disposal