1 · The HYDROVAR controller comes with a pressure transducer, transducer connection cable and transducer mounting hardware as standard. The standard pressure transducer is stainless

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This leaflet is subject to alteration without notice

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This leaflet is subjet to alteration without notice

www.hydrovar.com

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What is the HYDROVAR?

What is this different?

The HYDROVAR changes everything.

The HYDROVAR does away with all of these.

Ü

The typical construction of a pressure set or constant pressuresystem includes one or more pumps assembled together withcommon suction and discharge headers which are thenconnected to a large pressure accumulator, this package set isthen connected to the system. As the system demand increasesthe pumps are switched on by some form of pressure sensor thatoperates through a control panel. On systems which requirealternating duty sequencing a microprocessor is required and onsome systems bypass lines are maintained by the use ofmetering valves. The use of some of these variable speed drivesalso requires the use of special motor/controller combinations.

HYDROVAR is the world’s first pump mounted, microprocessorbased pumping system controller. Designed by VOGEL PumpsAustria, the HYDROVAR does much more than just change motorspeed. It truly manages the pump performance to match a widerange of system conditions and requirements.

By combining the HYDROVAR with our popular SSV, FCE,MPB, LM, LMR and LFZ series pumps, we have created anextremely versatile range of pumps for use in HVAC, watersupply, irrigation, filtration, pressure wash, boiler feed, circulation,and a wide range of OEM applications.

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The idea ..... all components contained within one unit!

BLOCKPUMPS FREQUENCY INVERTERtotally enclosed IP 54 / IP 55

PRESSURE TRANSMITTERorDIFFERENTIALPRESSURE TRANSMITTER

Control byMICROPROCESSORincl. automatic change over


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Motor power up to 22.0 kW

approved as per

EN 55011 / EN 50082

from 1.1 kW

from 11

kW to

22.

2 kW

.


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„Highlights .... at a glance”

Fitting of oversized motor allowsincreased output in overspeedrange.

Immediate shut down of pump atzero consumption.

Pump duty adjusts automatically tomeet demand i.e. follows thesystem curve.

Energy saving up to 70% atpartial load.

pump with constant speed

pump (variable speed)

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Example:Circulation pump with nominal power of 11 kW at partial load

Energy saving within 1 year (8.760 hours)

Compared with the investment of Hydrovar control unit, the pay back period is less than one year (depending on energycost).

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„Highlights .... at a glance”

SimpleInstallation!

Sufficientcooling of inverter

by motor fan

No need for externalpressure or differential

pressure sensing

Saving of in-vestment costs by elimin-

nation of control panel

Rigid Aluminiumhousing totally

enclosed IP 54 / 55

No need for flowmetering because ofindirect flow sensing

Simple design of multiple pump units (max. 4 pumps) by integralprocessor and interface connection (RS 485) which allows automaticswitch over in case of pumps being out of sequence, cyclic change oflead and lag pumps, automatic start and stop of lag pumps following

the system demand, provision for connection into central control system.

1) mechanical installation 2) electrical connection 3) setting of desired parameters

BMS


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Engineering

Control:

The built-in frequency inverter and microprocessorprovides pump control based on pressure, differential pres-sure, or flow. The patented VOGEL pressure control ver-sion stops the pump immediatly at zero consumption. Thedischarge of the pump is being calculated via the speedindirectly and may be programmed to compensate forvarying friction losses following a programmable systemcurve.

The Hydrovar variable speed pump may additionally becontrolled externally with the required speed fed in by anexternal control system.

To prevent unauthorized personnel from changing operat-ing data, a password may be set up. The starting andstopping of the pump as well as the setting of controlparameters is done at the keyboard and shown at the LCDdisplay at the drivehead (in „HV 1.x, no display). The dis-play is two lined and programmed for seven languages.There are also three diodes to indicate pump ready, pumprunning and fault.

An analogue signal to monitor speed or pressure is pro-vided. Communication with a central control system is alsopossible via an RS 485 interface. Each HYDROVARdrivehead contains an individual microprocessor whichcontrols the automatic operation of lead and lag pumpsaccording to demand. Cyclic change over of lead and lagpumps, automatic start and start of the next pump tocome in case a pump gets out of order. No external con-trols are necessary.

The voltage controlled frequency inverter supplies a sinusvariated pulse width modulated output voltage. It workswith controlled sinusoidal current synthesis and a dynamicovercurrent limitation. The high swichting frequency(selcted between 2,5 and 80 kHz) prevents undesirednoise from driving motors. Reactions to the feeder are pre-vented by a filter. Inverter cooling is enhanced by the motorfan.

There is also a memory for inverter ”fault” signals an op-erating hour counter and an automatic cyclic start up ofthe pump as a test run.

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Primary ApplicationsAny process requiring various hydraulic data

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Applications for the HYDROVAR systems are similar to those for the pumps they are used on. The deciding factor isa variable demand for either pressure, or flow, or both. These conditions are normally found in applications in volvingwater supply and circulation.

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Primary Applications

WATER TREATMENT AND PROCESSING PLANTSAutomatically controlled pumps for constant flow

at variable pressure.

WATER SUPPLYFully automatically operating speed controlled boosterunits comprising max. 4 pumps for building services.

WATER SUPPLYFully automatic speed controlled booster

pumps to compensate for high friction losses duringpeak consumption periods.

Q = constant

Overhead tank

HEATING, VENTILATION, AND AIR CONDITIONCirculators up to 340 m3/h operating at variable speed

to follow system curvers (for single or twin pumps).

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Product Overview

What is the typical HYDROVAR system?

With the HYDROVAR, one or more pumps are connected to common headers as in a standard system, but that is wherethe similarity ends.

No special pumps or motors:

The HYDROVAR will be mounted directly onto standard 230/400 volt, three phase TEFC motors with class F isolation upto 22 kW. Preselected combinations are available with the SSV, SHS and FCE series range of pumps and the Vogel MPB,LM, LMR and LMZ rage of pumps.

No separate pressure sensors:

The HYDROVAR systems comes with your choice of pressure transducer for various maximum readings or an orificeplate with a differential transducer for constant flow settings. They are mounted to eliminate the need for special piping.

No separate microprocessor systems:In a multi-pump system a microprocessor is used to sequence the pumps or control the VFD on pump motors. Becausethe HYDROVAR is a Microprocessor system, no other controllers are needed.

No separate control panels and inverters:

A control panel has protections such as overload, overtemperature, short circuit (and others) built-in. It also acts as theinterpreter between the pumps and the pressure sensor and may have an inverter to change motor speed. As a systemthe HYDROVAR acts as the control panel on the pump. An isolated fused main supply is the only external device required.

No bypass lines and metering valves:

Most standard control systems are designed to control motors and do not offer much in the way of hydraulic protection.Protection from dead heading and running off the end of the curve must be provided in the piping. With the HYDROVAR,the pump will shut down at zero demand, or low suction, or maximum flow.

No large pressure accumulators:

Without a supply tank, a constant speed pump will be constantly turning on and off and running up and down the curveat maximum power to satisfy system demands. In the HYDROVAR system, each pump changes is operating speed fromzero to 3000 rpm to constantly maintain constant pressure or flow and therefore eliminates the need for a large pressureaccumulator. A small pressure tank is required to maintain system pressure at zero demand, however this is about 10%than required for a constant speed system. Where local regulations permit, HYDROVAR pump sets can be connected directlyonto the water supply line therefore also eliminating the need for large break tanks on the suction side. In addition, theoperation of the pump at the correct speed for the required duty leads to a significant reduction in energy consumption.

Anti-condensation HeaterAll units are supplied with anti-condensation heaters to switch on when the units are in standby mode.

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Product Overview

What are the various configurations?The HYDROVAR control is currently available with the SSV, FCE, MPB, LM, LMR and LMZ pumps up to 22 kW. Eachof these configurations was specifically selected to provide optimum performance and energy savings on a wide rangeof systems needs 30, 37 and 45 kW only for wall mounting. Each system comes with a standard three phase TEFC motorselection.

Note:

A 3 phase TEFC motor must always be used with the HYDROVAR controller. The motor connects to the HYDROVAR andthe HYDROVAR connects to the power supply.

For 2,2 kW and below, the HYDROVAR input requirement is single phase 230 volt. For 2,1 kW and above the HYDROVARinput requirement is three phase 400 volt.

Att. Both options available for 2,2 kW and 2,1 kW.

The HYDROVAR controller comes with a pressure transducer, transducer connection cable and transducer mountinghardware as standard.

The standard pressure transducer is stainless steel Aisi 316 with a viton gasket and is designed for pressure up to 10 bar.For higher pressure applications a 25 bar transducer is supplied. If constant flow is selected an orifice plate with a differentialpressure transducer is available. The measured differential pressure is converted to flow and used to adjust the pump runningspeed.

The HYDROVAR can work with any sensor (i.e. level, velocity, temperature, chem. concentration, flow ...) emittinga 4-20 mA signal.

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Product Overview

Motor mounted HYDROVAR units

15÷22 kW 5,5÷11,0 kW 1,5÷4,0 kW

HV 1.1-1.2The control-design is similar to the standardHYDROVAR but smaller and cheaper!

These units are available for 1,1, 1,5 and 2,2 kWmotors.

Standard controls for the unit are two push buttonsand one LED indicator.

A separate programming module is available andnecessary to programm the unit, but not necessaryduring operation.

Sequence-control for max. 4 pumps is possiblealso with the HV 1.1 - 1.2.

For further information, please see the separateleaflet!

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Product Overview

HYDROVAR for mounting on the wall

HYDROVAR-wall mounting version

1.1 - 2.2 kW 1.5 - 11,0 kW 30 - 45 kW

Applications: 1. HYDROVARwall mounting version

with clearwatersubmersible pump

15.0 - 22.0 kW

This HYDROVAR design variant allows the device to be used tocontrol submersible pumps for drinking water and sewage. Thelength of the shielded cable to the motor should not exceed 20 m. For cable lengths up to 100 m, an additional electricaldevice is necessary, which is optionally available, the maximumspeed must also be reduced. All control functions are identicalto those of a normal HYDROVAR control device.

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Product Overview

2. Many pumps in process must have explosion proof drives.

That’s why HYDROVAR units are available in a wall-mounting version op to 22 kW and in a split version up to 45 kW.

These units can be combined with explosion-proved motors but they are mounted outside of the explosion areaand not on the motor.

3. HYDROVAR wall mounting units for sewage submersible pump

Saving cost for building, saving energy

cost saving by reductionof reservoir volume

saving pump energyup to 50 %

Explosion area Non explosion area

Wall-mountingversion

30-45 kW

Explosion proved motor

SwitchboardHYDROVAR inverter

Leveltransmitter

1,5-22 kW

nmax

l

l

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Product Overview

What does the HYDROVAR do?The basic function of the HYDROVAR is to control the pump to meet your system demands in one of three ways.

Control for constant pressure Control to match a system curve Control for constant flow Actuator mode

It performs these functions by:

1) Measuring the system pressure or flow via a transducer mounted on the pump discharge or pipe.

2) Calculating the motor speed to maintain the correct flow or pressure.

3) Sending out a signal to the pump motor for start, increase speed, decrease speed or stop.

4) In the case of multiple pump installations the HYDROVAR will vary the order of the lead pump and turn on the lagpumps automatically of duty/assist sets.

In addition to the basic functions, the HYDROVAR can do things only the most advanced computerised controlsystems can do, such as:

l Shut off the pump(s) at zero demand immediately.

l Shut off the pumps at zero suction.

l Shut off a single pump when exceeding maximum flow or automatically turn on the next pump in a multiple series.

l Protect the pump and motor from over voltage, under voltage, overload and overhead.

l Vary the time of pump speed acceleration and deceleration.

l Automatic compensation of higher friction losses at high flow rates.

l Send out a signal for remote monitoring of pressure and frequency.

l Conduct an automatic test run of the pump at set times.

l Display all functions in an LCD window in 7 different languages.(English, German, Spanish, Portugese, French, Italian, Dutch)

l Can communicate with another HYDROVAR, computer, or other controller via an RS 485 Interface

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HYDROVAR Single Pump Control

1) Constant discharge pressure over the flow range of thepumpIn this method, the desired discharge pressure is set (in bar)by the operator. The HYDROVAR varies pump speed as de-mand increases or decreases to keep the pressure constant.

In order to set the HYDROVAR for this application, the pumpsshould be selected so that the maximum pressure and flowrequired by the system is on or below the full speed (usually2950 rpm) performance curve of the pump. A single pumpshould not be selected it if cannot meet the maximum sys-tem requirements.

2) Compensation for system losses(following system curve)

The operator can increase the discharge pressure of the pumpas the flow increases to compensate for the added frictionlosses in the system. This allows the pump to „follow thesystem curve”. To do this, the operator enters the percentageincrease in discharge pressure required at the maximumspeed and flow. In addition, the operator selects at which thisincreased pressure will start.

The pump should be selected so that the maximum flow is onor below the 2950 rpm curve. An alternative method is to usea differential pressure transducer on a circulator suction anddischarge. The HYDROVAR will automatically compensate thefriction losses depending on the increasing flow and speed.

Compensation for System Losses

Constant Pressure Control

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3) Maintaining a constant flow

This method allows the operator to set a required flow in ei-ther circulator or process applications. The actual flow valuecan be measured either by means of a flow sensor(4-20 mA; linear) or by using an orifice plate in combinationwith a differential pressure transducer (4-20 mA; quadraticfunction). Correct settings must be made while programmingthe unit.As demand changes, the HYDROVAR increases pressure tomaintain flow. The pump should be selected so that the flowrequired is left to the maximum efficiency point of the pumpand the maximum pressure required is within the scope of thepump performance at full speed.

4) Actuar mode

In actuator mode the pump speed can be varied by an externalsource using a 4-20 mA signal. In this case the built incontroller is taken out of circuit.

5) Protection from low/no suction or run out

If the programmed limit (pressure or flow) cannot be achieved within a predefined period of time, the controller will switchoff automatically. When the auto reset function is set on the controller, it will attempt to restart five times but willswitch off completely after five unsuccessful attempts.

Actuator Mode

Constant Flow Control

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6) Operator custom controls

The HYDROVAR has several operator controls which may be selected for both single and multiple pump applicationsdepending on working conditions and individual preferences. Please refer to the operating manual for specific programmeoptions.

l The HYDROVAR has language options available that can be preset for 7 different languages.

l Except for the basic settings the HYDROVAR is password protected which that the programme can only be changedby authorised personel. The factory installed password is 0066.

l The HYDROVAR can be set to operate at any frequency up to 70 Hz. In order not to overload the motor the unitshould not be set frequencies higher than the nominal rating of the motor being used.

l Units available can be programmed to show bar, psi, m3/h, gpm, mH20, feet or percentage.

l The display contrast can be altered to operator preference.

l Test run of the HYDROVAR can be done manually or programmed to operate automatically at set times.

l All the programme settings can be locked or reset to default factory settings.

7) Operator indicators and display (not for HV 1.1-1.2)

The following displays are found on the HYDROVAR, the unit can also be monitored remotely through the RS 485interface.

l Indicator lamps show power on, run and fault, which indicate the basic status of the unit.

l The display shows a pressure reading, which shows the current pressure being read by the transducer.

l The jog mode shows the current pressure and frequency in hertz, the operator can modify the speed by using theup/down button as a test. The HYDROVAR reverts back to its programmed settings once this display is changed.

If the pump stops the HYDROVAR will record and display the last 5 error messages, which can be used for troubleshooting.

l The number of hours of both the pump and HYDROVAR are logged. These settings can be reset.

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HYDROVAR Multiple Pump Operation and Control

HYDROVAR Multi-Pump System

Multi-Pump Constant Pressure System Curve

Up to four HYDROVAR controlled pumps can operate togetherto form a system. No other control panels are necessary.

In a multi-pump system all pumps are connected over theRS-485 interface. The microprocessors monitor the activity ineach HYDROVAR to adjust overall system performance.

HYDROVAR controllers must be of the same size and type.

Constant Pressure Systems

Constant pressure is maintaned by the HYDROVAR ina multi pump system in the same manner as a singlepump system. The HYDROVAR can use up to fourpumps to maintain constant pressure. However, as thefirst pump reaches maximum speed, increasing de-mand will cause the pressure to drop as the pump runsdown is curve. In a single pump system, the pumpwould shut down at run out. On a multi pump system,the pressure drop causes the second pump to comeonline.

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HYDROVAR Multiple Pump Control

Set UpIn a multiple pump system the HYDROVAR unitsare wired together through the microprocessor inter-face. The operator sets each HYDROVAR to multi-controller mode and assigns each pump an ad-dress (Adr.1, Adr.2, etc.). The operator enters therequired system pressure and the pressure dropallowed before the next pump starts.

Automatic Lead/lagThe HYDROVAR will automatically change thesequence the pumps use to turn on or off in orderto provide even wear. The operator can adjust howoften this sequence change is made.

Following a system Curve onMulti-Pump System

To compensate for increase friction losses theoverall pressure setting can be automatically up-graded every time an additional pump is started.

System Loss Compensation with Multi-PumpHYDROVAR System

Set UpWhile programming the units the operator must set a pressure drop to allow an additional pump to come on line. However,the operator also needs to enter the amount of pressure increase needed for each new pump based on system lossesat higher flows. As each new pump starts, the pressure required by the system is automatically increased by the amountentered. To determine the added pressure, the operator must deduct the pressure drop at which the next pump starts.

Operator Controls and Indicators

Controls and indicators for the multi-pump system are the same as those covered under the single pump controls andindicators.

00

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Regulation mode „NORMAL”

Applications of the HYDROVAR with the regulation mode „NORMAL”(if the actual value drops, the output frequency will be increased)

This regulation mode will be used to control on:

l constant system pressure on the discharge side of the pump

l constant diff. pressure

l constant flow

l constant level in a open or closed tank or boiler behind the pump

Control fordifference pressure

Control for pressure Flowmeter

TankBoiler

Orificeplate

Control for flow Control for level

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Regulation mode „INVERS”

Application of HYDROVAR with regulation mode „INVERS”(the output frequency will be decreased if the actual value drops)

This regulation mode will be used to control on:

l constant incoming pressure

l constant level on a tank which is mounted before the HYDROVAR pump

EnvironmentAmbient temperature requirements for the HYDROVAR are 5°C – 40°C, the same range as most TEFC motors. Temperaturelimits may be extended to 52°C by using the next size of HYDROVAR controller upon request.

Humidity requirements for the HYDROVAR cannot exceed more than 50% at 40°C and no more than 90% at 20°C. Theunit should be protected from outdoor weather and condensation.

The environment should also be free of excess amounts of dust, acids, corrosive gases, salts, etc.

An interference filter is included in the HYDROVAR to prevent interference with other electronic devices.

An LCD display on the control panel supplies all information and programming help.

Pressure sensitive switches are included for on, off, increase, decrease and select.

Display lights indicate power on to the HYDROVAR, pump running and fault.

Operating temperature for the pressure transducer are –20° to 80°C. The upper limit may be extended to 120°C by usingthe extended mounting hardware on the SSV version.

Control for incommingpressure

Tank

Control for level

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Additional functions, included as standard in all HYDROVARSl 2 required values programable; switchover by ext. dry contact

l Second analogue input 4-20 mA / 0-10 V

Variation of the required value by external signal and limitation of the pump performance because ofexceeding a limit of the second sensor signal (e.g.reducing the required flow, when level is below a minimum)

and reducing the outlet pressure for fountainsaccording to the wind velocity

and mixing of 2 separate fluids at the same ratio

and ... and ... and ...

2

1

1

2

2

1

1

2

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External Control and Monitoring PumpLink

PumpLink has been developed especially for communication between Hydrovar pumps and PC. The built-inRS 485-interface enables to check and change all settings of each parameter of the HYDROVAR via PC. Additional it’spossible to transfer default or saved parameter settings for different applications to the HYDROVAR-units.

If there is an error in the system a message is sent automatically to the PC and indicates the failures of the system. Youcan define the digital inputs as well as the levels of the analogue inputs as a failure for an alarm message.

The complete application is visually shown on the monitor together with the possibility of all used inputs. PumpLinkdisplays „online” the status of the HYDROVAR units (up to 4 pumps) and also the flow rate, frequency of the master-pump and all actual values of the analogue inputs.

The PumpLink unit saves switch intervals of the pumps, flow rate and all other analogue and digital signals for a latercheck and/or link to a PC. So it’s possible to create reports as documents or graphic diagrams of hourly or dailyconsumption, level pressure.

The standard connection between the PumpLink and the PC is a direct Link cable. Optionally can be also used a modem(standard telephone net or GSM-net).

Please order detailed information about PumpLink atwww.hydrovar.com or send an e-mail to [email protected]

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Pump Sizing and Selection

To select a variable speed pump for constant pressure, two pri-mary pieces of information are needed: the pressure required andthe maximum flow rate of the system.

When this information is known, check the range curves of thevariable speed pumps being considered and select the one thatcovers the pressure rating up to the maximum flow rate. Thispoint should be to the right of the pump BEP and within 10%efficiency points of the best efficiency.

To keep the power requirement down, the selected pump shouldmeet the maximum pressure and flow point at or near the maxi-mum pump speed curve.

In a multi-pump arrangement, the pumps may be selected toprovide only part of the total flow needed. This will provide a built-in backup for most of the flow range and also balance pump wearwith use of more than one pump.

NPSH should also be calculated based on the maximum flow andpressure rating point.This is a worst case condition becauselower speed performance will require less NPSH.

Constant FlowIn a constant flow application a single pump, which has the flowrange needed, is typically selected as shown in opposite picture.For this application, the BEP of the pump should be right of therequired flow rate.

Selection of pressure controlled pumps

Selection of flow controlled pump

Constant Pressure

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System Comparison

HYDROVAR System vs Fixed Speed SystemsSince a conventional pump can only operate along its performance curve, a constant pressure system must always in-volve other components in order to regulate the supply of liquid to the ”user”. These other components can add up to muchthan the cost of the pump alone.

With the HYDROVAR system, large pressure tanks are not required. Each unit has a soft start and gradual ramp up toeliminate premature pump wear and water hammer and also reduce energy costs at periods of low demand. A typical twopump HYDROVAR system requires no more than a vessel volume of 10% of the l/min performance of one pump.

The precharge pressure of the vessel must be set to approximately 10-15% less than the system pressure requirement.

Pressure Switches

Pressure switches are normally installed at the discharge of each pump in the system and used to turn each one on andoff as demand changes and are connected to a control panel to sequence the pumps. The pressure switch is an on/offdevice that does not provide information on the system demand below or above the set point – a distinct disadvantage.

In the HYDROVAR system, each pump is equipped with is own pressure transducer to measure the required systempressure. This allows the pump to react to very slight changes in demand with the correct amount of pressure and flow.A pressure switch or float control may be used on the suction side of a HYDROVAR equipped pump as a cut off forlow / no suction.

Control Panels

A typical multi-pump booster package has a control panel that provides protection and sequencing of the pumps. Moresophisticated units will have a microprocessor that controls pumps and valves and interprets input from the switches andfloats. Some panels also have a variable frequency drive. Panels with microprocessor control and or VFC control aresignificantly more expensive than a standard panel.

With the HYDROVAR, no control panel is needed. The HYDROVAR contains all the functions of the most sophisticatedmicroprocessor based VDF panels. Sequencing and start/stop controls are communicated directly by the HYDROVARto each pump – extra controls are not needed for multi-pump systems. The HYDROVAR requires only a circuit breakerpanel.

Automatic ValvesSolenoid valves or modulating/metering valves are used to control flow and pressure as the pumps keep running. Con-tinuous duty boilers use this method. Use of these valves can create problems of water hammer and dead heading forthe pump. Bypass lines and pressure tanks are used to handle these types of problems.

The HYDROVAR eliminates the need for automatic valves to control the pressure, flow or shut off of liquid to the system.All these features are contained within the microprocessor controlled variable speed pump. In addition, since thereis no danger of valve water hammer or dead heading, bypass lines and pressure accumulators are not required.

Jockey Pump

The standard booster system is sized for peak capacity and is very inefficient when demand is low. For this reason, a highhead low flow pump is added to the system to handle occasional demand during off peak periods. This pump will run witha much lower power requirement and reduces wear on the main pumps.

The HYDROVAR can drive the pumps at very low speeds and energy consumption, eliminating the need for a jockey pump.Off peak demand can be handled efficiently and easily with the same system used for peak periods.

However, if main pumps become bigger a smaller pump also drive by a HYDROVAR can be incorporated into the systemto cover low demand duties in a more efficient way.

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Hydraulic Performance

Operating range HYDROVAR 22,0 kWMotor mounted or wall mounted

Operating range HYDROVAR split,45,0 kWFour mounting on the wall only!

- 29 -


Features and Benefits

Feature Advantage Benefits

Features and Benefits

l Maximises system performance

l Reduces power consumption

l One pump selection for fullperformance range

l Stepless transition for steady supply

l Reduces intermittent operation

l Eliminates large storagetank cost and space

l Energy savings

l Higher reliability

l Space savings

l Assembly savings

l Single source supply

l Simplified design

l No flow shutoff

l various fault protections

l Eliminates bypass lines

l Eliminates pressuremodulation and metering valves

l Reduces power consumption

l Meets changing demand

l Eliminates separate panel

l Automatic sequencing

l Automatic lead/lag

l Remote monitoring and status display

l Remote control

l Maintain constant pressure

l Friction loss compensation

l Maintain constant flow

l Long service life

l Low starting current

l No water hammer

Variable Speed Match Pump Performanceto system demands

Constant pressure

Lower mechanical load

Less system compenents

Pump protection

System curve compensation

On-line-interface

Pressure sensing

Electrical protection

Soft start and stop

Eliminates start stress

Electronic Control

Microprocessor Control

Multi-pump control

On-line transducer

- 30 -


Multistage pumps SVH, MPBH Design VDH (with HYDROVAR variable speed pumps)

Package booster unit VDH 2 Package booster unit VDH 3

- 31 -


Single stage Inline pump FCEH Cooling water circulating pumps

Heating circulators Circulating pumps for heat exchanger

Documents

1 · The HYDROVAR controller comes with a pressure transducer, transducer connection cable and transducer mounting hardware as standard. The standard pressure transducer is stainless