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HWM Pegasus 2 Manual

Pressure control system
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User Guide: Pegasus 2
(Pressure control system)
Warning: This manual contains important safety and operating information.
Please read, understand, and follow the instructions in the manual.
MAN-163-0002-C
April 2024
1

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Summary of Contents for HWM Pegasus 2

  • Page 1 User Guide: Pegasus 2 (Pressure control system) Warning: This manual contains important safety and operating information. Please read, understand, and follow the instructions in the manual. MAN-163-0002-C April 2024...

  • Page 2: Table Of Contents

    Pilot Valve operation ..................24 2.11.3 Pilot operated pressure reducing valve ............25 2.12 PRV Function (under Pegasus 2 control) ............26 2.12.1 Pegasus 2 Mechanical Actuator ............... 26 2.12.2 Pegasus 2 System options: (Basic and “Latching” models) ......26...
  • Page 3 4.1.3 Interconnection Cable ..................50 Connection to the Flow meter ................50 Connect External Pressure transducers to Pegasus 2 .......... 51 Check / modify Pegasus2 channel settings ............51 Re-zero Pressure transducers ................53 Prepare the pipework for the Pegasus2 ..............55 Prepare the PRV for Pegasus Pressure transducers ..........
  • Page 4 Fitting and adjusting the HWM mechanical actuator ........62 4.14 Latch Option - Prepare the PRV ................65 4.15 Latch Option - Connect Latch pipework on Pegasus 2 side ......66 4.16 Latch Option - Connect Latch pipework on PRV side ........66 4.17 Latch Option –...

  • Page 5: System Documentation And Support Of Product

    RODUCT 1.1 D OCUMENTATION AND ECHNICAL SUPPORT Thank-you for choosing a HWM device. We trust it will provide you with many years of service. The Pegasus2 system is designed to control the outlet pressure from a clean-water pressure reducing valve.

  • Page 6: Use Of Cellular Networks - Important Notes

    1.4 U – I SE OF ELLULAR NETWORKS MPORTANT OTES Availability of SMS Most Pegasus2 models include the ability to communicate to a server via use of the cellular data network. This is usually via the regular data network (which gives internet access).

  • Page 7: Idt (Pc Version)

    Choosing which version to use Prior to IDT being able to perform its functions, it has to ‘connect to’ the Pegasus2; this simply means that the two end devices (Pegasus2 software and IDT software) are able to communicate with each other over a working communications path. IDT is available in three versions: IDT for PCs having a Windows-operating system.

  • Page 8: Overview

    (e.g., detection of a sensor failure). The Pegasus2 system typically consists of the following parts: A Control Box unit. • A Solenoid Box unit. • A cable linking the Control Box to the Solenoid Box. • A HWM mechanical actuator. •...
  • Page 9 An accessory kit for plumbing-in the Pegasus2 system to work with the PRV. • (HWM can supply standard kits containing coloured plastic tubing, a 3-way manual valve, quick-connect fittings). Hanging brackets. • Cables for sensors (transducers or meters). • An antenna for communication over the mobile cellular network •...
  • Page 10 The Pegasus2 system controls the PRV by means of hydraulic actuation. It therefore contains several solenoid valves which are controlled by the unit. These require connection to various points in the water supply and PRV. An example of a PRV with Pegasus2 system installed is shown opposite.

  • Page 11: Server Integration Option: Datagate And Pressview Websites

    RESS EBSITES When integrated with HWM’s DataGate server, the Pegasus measurement data can be stored on the server every time the unit makes a call-in. The data can be viewed remotely / graphically by anyone with a suitable user account (and password) using a standard web-browser.

  • Page 12: Completing The Communications Path

    2.4.2 IDT app - used with a Tablet (Android) / USB option Certain Android-based Tablet devices (which must have an available USB port) are able to use this method. (For known compatible devices, contact your HWM representative). Prior to use, the mobile device should have the IDT app software installed.

  • Page 13: Idt App - Used With A Mobile Phone Or Tablet / Bluetooth Option

    Tablet / phone The connection path (refer to the diagram above) makes use of a communications adaptor known as the HWM ‘Bluetooth Interface Link’. Connect the Pegasus2 end of the communications cable to the COMMs connector. Then the USB-A end of the cable should be plugged into the USB-A port of the Bluetooth Interface Link unit.

  • Page 14: Pegasus 2 System Kits

    OPTION The system operates from internal batteries or (optional) using an additional external HWM battery unit (see an example opposite). Where supplied, the external battery power is used to extend the battery life of the system or for more frequent communications with the host server.

  • Page 15: Logger Functions & Logging Running State

    2.7.1 Logger functions & Logging running state At the appointed time, the built-in logger will go into the state of “Recording” and begin repetitive logging. The logger will periodically sample the sensors employed by the PRV controller, but additional sensors can be optionally included in the built unit. These must be requested at the time of ordering;...
  • Page 16 • The IDT (PC version) must first be used to read the logger’s program into the PC memory. Then (possibly after some changes are made) the user must manually save the settings to the unit, using the ‘Setup Device’ button. During the process, the program is saved and then read-back into IDT, along with the latest logger status;...

  • Page 17: Prv Control Functions & Running State

    2.7.2 PRV Control functions & running state PRV control is a separate activity to that of the built-in logger. The PRV controller samples various inputs and determines what action (if any) is required to modify the PRV output pressure. The PRV control can be in one of the following states: No Control •...

  • Page 18: Controller Description

    The part-number describes the content of the unit, as follows ... Model Number(s) Description C163C / * / * / * / * Pegasus2 Controller (Reserved by HWM for other options). Electrical options. Pegasus2 Control Box unit.
  • Page 19 “Electrical options” is a 6-character field, as follows: c c c c c c (character positions 1 to 6) Battery Fitment option (Additional Interface - Option 2) (Additional Interface - Option 1) PRV inlet pressure transducer type Water Flow transducer type PRV inlet pressure transducer type Pressure input (key): 3 –...

  • Page 20: Solenoid Box - Description

    The Front of the Control Box is labelled to show the position of each of the standard connectors. Non-standard connectors (for additional options fitted) are not labelled; refer to the model number and part-number guide (above). An example of a unit with internal pressure sensors and...
  • Page 21 The part-number describes the content of the unit, as follows ... Model Number(s) Description C163S/ * / * Pegasus2 Controller (Reserved by HWM for other options). Fitted options. Pegasus2 Solenoid Box unit. “Fitted options” is a 4-character field, as follows: c c c c...
  • Page 22 Battery Fitment options (key): F – Fitted internally and also connected (standard). D – Fitted internally but disconnected. S – Shipped separately. E – Empty. (Fixings for internal battery are supplied, but no battery). N – (Nothing supplied: No internal battery. No fixings). Hydroswitch interfaces (key): 0 –...

  • Page 23: Hydroswitch - Description

    PRV behaviour so that it produces downstream water pressure which follows the programmed pressure profile closely. This is achieved with the help of the HWM Mechanical Actuator, shown opposite. The actuator consists of a diaphragm sandwiched between two concave plates.

  • Page 24: Summary Of Prv Function (Pilot Operated)

    2.11 S PRV F UMMARY OF UNCTION ILOT OPERATED (Readers familiar with PRVs controlled by pilot valve operation may skip to section 2.12). 2.11.1 Main valve The main components of a Pressure Reducing Valve (PRV) are shown opposite. A plunger within the valve body is able to close Main valve Inlet onto the valve seat (closing off water flow) or open...

  • Page 25: Pilot Operated Pressure Reducing Valve

    2.11.3 Pilot operated pressure reducing valve A pilot operated pressure reducing valve automatically and accurately reduces downstream water pressure to a specific, adjustable value. Pressure adjustment bolt Pilot Valve Water Filter The Pressure Reducing Pilot [1] senses downstream pressure [2] and in real time modulates the top chamber of main valve [3] to maintain a constant downstream pressure.

  • Page 26: Prv Function (Under Pegasus 2 Control)

    4.12 and 4.13. The pilot setting can therefore be continuously adjusted by Pegasus2, thereby allowing control of the downstream water pressure. 2.12.2 Pegasus 2 System options: (Basic and “Latching” models) All Pegasus2 systems contain ports labelled “Actuator”, “Inlet” and “Vent”. (Additional: These are connected to the internal “Latching”...

  • Page 27: Explanation Of Latch Solenoid Activation (High And Low Unreachable)

    Non-latching versions: Latching versions: Latch Input Latch Output Actuator Actuator Vent Vent Inlet Inlet S1 and S2 are 2-port valves which are normally sealed. An electronic pulse to one of the valves momentarily actuates it and allows a small quantity of water to flow through it. S3 (where fitted) is a 3-port valve with a common port.

  • Page 28: Theory Of Operation (Continuous Pressure Modulation)

    If Pegasus2 is repeatedly trying to decrease the output pressure, but not • reaching the target pressure, this is known as a ‘Low unreachable’ condition. (adjustment attempts) Low Unreachable Pressure (actual) is triggered. (If set, the Deadband Latch solenoid Pressure (Target) valve is activated) Deadband Illustration of...
  • Page 29 The controller can pulse solenoid valve S2 to slightly deflate the upper chamber of the HWM mechanical actuator. This decreases the outlet pressure. A small amount of water is discharged to the vent port, where it should be piped away from Pegasus to drain at a suitable location.

  • Page 30: Theory Of Operation (Continuous Pressure Modulation + Latch)

    Caution: When PRV inlet pressure exceeds 90m, an alternative installation is required… Use the downstream water pressure for the Pegasus inlet port instead, as shown. 2.12.5 Theory of operation (Continuous pressure modulation + Latch) Pegasus2 models with the ‘Latch’ option fitted have an additional internal solenoid and associated ports (‘Latch Input’...
  • Page 31 Note: Standard plumbing and operation requires the following Pegasus2 settings in IDT: Latch (valve) ‘Closed’ (not activated) (Pegasus2 using pilot valve and actuator) The connection between the pilot valve and the upper chamber of the PRV simply passes through the Latch solenoid, rather than being directly connected. Whilst S3 is in the position shown, operation is identical to that previously described for the non-latched model (see section 2.12.4).
  • Page 32 Latch (valve) ‘Open’ (activated) (Pegasus2 has by-passed pilot valve) Applications The “standard installation” type, when used with the ‘Latch on high unreachable’ • setting provides Continuous Pressure Modulation by using the mechanical actuator to control the PRV pilot valve. (i.e. Normally the latch solenoid valve is not activated). In addition, during times when the inlet pressure is low (e.g.
  • Page 33 2.12.5.2 Non-standard operation (and plumbing) There is an alternative way to plumb a Pegasus2 (set for modified operation) into a PRV installation, an example of which is illustrated below: Latch (valve) ‘Closed’ (non-activated) Re-purposed Re-purposed as “Inlet” as “Vent” (Pegasus2 using pilot valve and actuator) Note: The Pegasus2 Vent and Inlet ports are re-purposed by swapping over their functions and plumbing.
  • Page 34 With the Latch solenoid in the position shown above, the water pressure supplied through the port labelled “Vent” (which is re-purposed as the inlet port) is used to slightly inflate the mechanical actuator when S2 is given a short electronic pulse. A short electronic pulse to solenoid valve S1 will slightly deflate the mechanical actuator by discharging a small volume of water through the port labelled “Inlet”...
  • Page 35 output pressure. When non-standard installation is used with the ‘Latch on low unreachable’ setting, the Pegasus2 will detect if 0m is not being achieved and will subsequently activate the Latch circuit. This will further lower the pressure output, by causing the PRV to close.

  • Page 36: Configuration Options (Diagrams)

    Common override. (to mechanical Actuator) Control port HWM mechanical actuator Provides a means to set mechanical Maximum and Minimum settings on the pilot. Pilot valve The pilot valve fitted to the PRV.
  • Page 37 (Image shown is for illustration purposes only) Pegasus 2 Solenoid box The Pegasus2 solenoid box is shown opposite. The Inlet and Actuator connections are always plumbed into the system. The vent port connection to a drain is omitted from certain drawings in this manual for simplicity.
  • Page 38 Pegasus 2 Control box The Pegasus2 control box is shown opposite. The unit receives water flow information from a flow meter (not supplied) via the connector labelled “Flow”. The unit receives upstream water pressure information via the connection labelled “PRV Inlet Pressure”.

  • Page 39: Standard Installations: Continuous Pressure Control

    3.2 S TANDARD INSTALLATIONS ONTINUOUS PRESSURE CONTROL 3.2.1 Using: internal transducers (Pressure in < 90m)

  • Page 40: Using: External Transducers (Pressure In < 90M)

    3.2.2 Using: external transducers (Pressure in < 90m)

  • Page 41: Using: Internal Transducers (Pressure In > 90M)

    3.2.3 Using: internal transducers (Pressure in > 90m)

  • Page 42: Using External Transducers (Pressure In > 90M)

    3.2.4 Using external transducers (Pressure in > 90m)

  • Page 43: Standard Installation + High Pressure Unreachable

    3.3 S TANDARD NSTALLATION RESSURE NREACHABLE 3.3.1 Using: Latch solenoid / internal transducers (Pressure in < 90m))

  • Page 44: Using: Latch Solenoid / External Transducers (Pressure In > 90M)

    3.3.2 Using: Latch solenoid / external transducers (Pressure in > 90m)

  • Page 45: Using: Latch Solenoid / Internal Transducers (Pressure In < 90M)

    3.3.3 Using: Latch solenoid / internal transducers (Pressure in < 90m)

  • Page 46: Using: Latch Solenoid /External Transducers (Pressure In > 90M)

    3.3.4 Using: Latch solenoid /external transducers (Pressure in > 90m)

  • Page 47: Other Installation Options)

    PRV can also be monitored and logged. An additional Interface option can be installed in Pegasus 2. e.g. For a pressure transducer. 3.4.2 Control of two PRVs Pegasus2 can be used to control certain installations that have two PRVs that are connected in parallel.

  • Page 48: Installation Procedure (Pegasus2 / Standard Operation)

    NSTALLATION PROCEDURE EGASUS STANDARD OPERATION WARNING: This equipment should be installed, adjusted, and serviced by qualified water industry maintenance personnel, familiar with the construction and operation of the equipment and the hazards involved. Failure to observe this precaution could result in damage to the water network.

  • Page 49: Position Control And Solenoid Boxes / Link With Cable

    Attach a communications cable between Control Box and PC for set-up of the • system. Program the required pressure profile and other settings into the Pegasus. • o Read the current configuration. o Make any changes required to the on-screen settings. o Program the Pegasus with the on-screen settings.

  • Page 50: Interconnection Cable

    4.1.3 Interconnection Cable Connect the Control box to the Solenoid box using the 6-way Pegasus2 interconnection cable (p/n: CA-163-0004-* / length). ONNECTION TO THE LOW METER Connection to the flow meter is required for any Pegasus2 that uses a pressure profile that is dependent on flow (i.e.

  • Page 51: Connect External Pressure Transducers To Pegasus 2

    Determine which transducer will be used for measuring upstream pressure and which will be used for measuring downstream pressure. Check the range of each transducer is suitable for use (refer to the label on the cable of HWM supplied external transducers, as described in section 4.4).
  • Page 52 The steps required for setup (or checking) of each of the logged channels is similar in nature to certain HWM loggers (e.g., Multilog2) and are described in the IDT user-guide; Refer to the user-guide appropriate to the version of IDT you are using for details...

  • Page 53: Re-Zero Pressure Transducers

    Ensure the channel settings are stored when finished. External Pressure Transducers – Entering Calibration coefficients External pressure transducers from HWM have calibration coefficients (usually located on the cable). Note: The final number represents the maximum pressure range of the transducer, in bar.
  • Page 54 To verify the transducers are re-zeroed, whilst still in atmospheric conditions: Select the PRV Installation tab and click on the “Live values” button. 25.0 The Upstream and Downstream pressure values should now read zero, or very close to zero. (Some additional information about the internal operation of the equipment is shown here: - ‘No hits’...

  • Page 55: Prepare The Pipework For The Pegasus2

    REPARE THE PIPEWORK FOR THE EGASUS Accessory kits which include coloured hoses are available from HWM (ACT00* series accessory kits); Coloured hoses makes identification easier. A manual 3-way valve and quick-connect fittings are also available. The standard ACT002/STD kit is shown below: Use the installation diagrams to select the type of installation required: Standard installation where inlet pressure to PRV is less than 90m.

  • Page 56: Prepare The Prv For Pegasus Pressure Transducers

    4.7 P REPARE THE EGASUS RESSURE TRANSDUCERS The PRV valve should be fitted with service taps that allow maintenance whilst the PRV is in operation. An example is shown opposite. Choose locations to be used for attaching the Pegasus pressure transducers and also the water feed to the Pegasus “Inlet”...

  • Page 57: Connect Pegasus2 Side Pipework

    4.8 C ONNECT EGASUS SIDE PIPEWORK Pipes can be connected directly to the Pegasus2 Solenoid Box ports by pushing the end of the pipe into the port. The pipes will be sealed and retained by the connector (until they are manually released, which requires pushing on the connector’s ring whilst pulling the pipe away from the connector).

  • Page 58: Connect Transducers And Basic Control Pipework On Prv Side

    4.9 C ONNECT TRANSDUCERS AND BASIC CONTROL PIPEWORK ON SIDE Before proceeding, confirm that the pressure transducers are of a suitable pressure range, that the channels have been set up, and the transducers have been re-zeroed at atmospheric pressure. (Refer to section 4.5). Connect any external pressure transducers to the appropriate location on the PRV valve, ensuring that: The upstream side is connected to the “PRV Inlet Pressure”...
  • Page 59 Use the manual controls within IDT to bleed air out of the pipework: Ensure control is de-activated (click on No-Control button if required). Within the Manual Adjustments panel, click on the “Up” button several times to pulse the solenoid valve inside the Pegasus2, allowing air and water to pass through the unit and fill first the red pipe (entering Pegasus) and then...

  • Page 60: Test Pressure Transducers

    4.11 T RESSURE TRANSDUCERS Select the PRV Installation tab of IDT. Click on the “Live Values” button. The display will show readings for the following: 35.3 25.3 Upstream Pressure (in metres) • Downstream Pressure (in metres) • 32.8 25.0 Flow (in l/s) •...

  • Page 61: Preparing To Fit The Actuator

    4.12 P REPARING TO FIT THE ACTUATOR Note: The following instructions assume that the valve is neither vented to the maximum (fully open), nor used to cut the water supply (fully closed) but is under the control of the fitted pilot valve. It also assumes that the PRV is fitted with service stop-taps at the relevant...

  • Page 62: Fitting And Adjusting The Hwm Mechanical Actuator

    ITTING AND ADJUSTING THE MECHANICAL ACTUATOR Ensure that the thread of the HWM mechanical actuator being used is the same type of thread as the existing adjustment bolt on the PRV pilot valve. (HWM can supply alternative threads if the actuator is unsuitable).
  • Page 63 Note: Use the Pegasus transducers and IDT to help set the actuator pressure settings. (See section 4.11). Screw the HWM mechanical actuator into the pilot of the PRV. It should be positioned at approximately the same depth as the pilot bolt, which has just been removed.
  • Page 64 To do this, hold the middle nut (fixed) on the actuator thread stationary, using a spanner, whilst rotating the actuator head. Screw it anticlockwise / outwards to decrease the output pressure. • Screw it clockwise / inwards to increase the output pressure. •...

  • Page 65: Latch Option - Prepare The Prv

    4.14 L ATCH PTION REPARE THE (When installing Pegasus models that do not include a latch or do not require the latch to be used … skip to section 4.19). Lock the PRV top chamber by closing the valve to the top chamber, if possible.

  • Page 66: Latch Option - Connect Latch Pipework On Pegasus 2 Side

    For a “Latch when high pressure unachievable” operation, the Pegasus Latch ports need to break into and control the path between the upper chamber of the PRV and the pilot valve, as shown in the illustration opposite. Dismantle the pipework on this part of the pilot control system and fix suitable adaptors to receive the plastic pipes from the Pegasus2 latch ports.

  • Page 67: Latch Option - Testing

    4.18 L ATCH OPTION ESTING Where fitted, facilities are available to manually test the latch (solenoid valve) option using buttons within the IDT tool. The latch can be opened or closed by the installer. When plumbed into the upper chamber of the PRV, this will cause the PRV to switch between being regulated, under control of the pilot valve, or to bypass the pilot valve.

  • Page 68: Testing The Actuator (Manual Override)

    4.19 T ESTING THE CTUATOR ANUAL VERRIDE The actuator can be tested when the PRV controller is not running (see section 4.10). The actuator can also be tested whilst the PRV controller is running, by using the ‘Manual Override’ facility. Note: Prior to testing the actuator, the Pegasus2 should have an initial control method and a few pressure targets set, so that the running PRV control has a target pressure to try to maintain.

  • Page 69: Prv Control Method And Settings

    To use the Pegasus2 transducers, click the “Live Values” button. The display will update to show pressure and flow values. (Other buttons are disabled whilst this is operating; click on the “Stop” button to re-enable the other button controls). If the target pressures are not achieved, check actuator settings and plumbing configuration before commencing further set up.
  • Page 70 limit can be set in the “Auto limit” field. Where the field is left blank, Pegasus2 defaults to a value of 8m. IDT App users: For – Deadband and – Auto Limit of Deadband Equivalent controls are located as follows: (main) →...
  • Page 71 Options are shown opposite. Caution: The setting you choose is dependent upon the desired behaviour of the system, which will also affect the way that Pegasus2 is plumbed into the PRV and its operation. Certain settings and plumbing combinations can lead to undesirable outcomes.
  • Page 72 Select ‘un-ticked’ (disabled) for any of the ‘standard plumbing’ schemes. • Select ‘ticked’ (enabled) for the non-standard plumbing scheme. • (IDT will provide a warning, as ports within Pegasus2 are re-purposed and the user must confirm that the installation follows the non-standard plumbing scheme).

  • Page 73: Setup Of Pressure Control Using A Time Profile

    4.20.1 Setup of pressure control using a Time profile To use a pressure profile that is based on time, tick the “Time control” option. (When “Flow Control” is disabled, flow does not participate in control decisions, but is still logged). …...
  • Page 74 A more specific setting made in the Day selection will over-ride a more general setting. e.g. “Saturday” will over-ride “Weekend” and “Everyday”. • “Weekend will over-ride “Everyday”. • With the settings as shown above: Most days have a target pressure of 55m between 8 a.m. and 9 p.m. •...

  • Page 75: Setup Of Pressure Control Using A Flow Profile

    4.20.2 Setup of pressure control using a Flow profile To use a pressure profile that is based on Flow, tick the “Flow control” option. … A “Flow Control Settings” panel will appear with additional options to set. (These will be discussed later). The “Flow Control Offset”...
  • Page 76 Enter the profile as Flow rate (in litres/second) vs the required PRV outlet pressure. The Flow Control pressure profile can be built as a table of Flow-rate (in litres per second) and pressures (in metres). The pressure profile is executed with linear interpolation between the pressures entered into the profile.
  • Page 77 Where flow control is enabled, the system looks at the current flow through the PRV in order to decide upon a target pressure. The “Sample Rate” determines how often a flow measurement sample is taken for evaluation, for PRV controller purposes only. Some statistical function (average) is applied to smooth out any fluctuation in the measurements which cause rapid and chaotic changes to target pressures.
  • Page 78 If a fault is detected the target pressure will be the value (in metres) set in the “Default Pressure”. However, when combined Time control and Flow control are enabled (see section 4.20.3), an additional control (called ‘Use Time Control’) becomes visible. If ticked, during a flow sensor fault the default pressure value will be ignored, and the pressure is determined only by the Time Control settings.

  • Page 79: Setup Of Pressure Control Using A Combined Time And Flow Profile

    IDT App users: Equivalent controls are located as follows: (main) → Configure Device → Control Settings → General tab. Tap the ‘Flow Channel Limits’ line to reveal the settings, if hidden. (When ‘Enabled’ is set to ‘Yes’, the Minimum and Maximum fields are also shown) 4.20.3 Setup of pressure control using a combined Time and Flow profile To use a pressure profile that is based on both...

  • Page 80: Setup For Annual Time Adjustments

    4.21 S ETUP FOR ANNUAL TIME ADJUSTMENTS Some countries have a scheme for adjusting the local time annually to make the most of available sunlight hours and for safety reasons. (e.g. British Summer Time, Daylight saving). Since water usage patterns follow people’s behaviour, it is possible for Pegasus2 to be programmed to adjust its local clock to match the scheme and thereby temporarily adjust effectivity times for any time-related pressure profile.

  • Page 81: Setting Logger Startup / Measurement Sample Rates

    4.24 S ETUP OF ELIVERY Pegasus2 can be setup to call into the HWM DataGate server (over the mobile phone network) at specific times. During a call-in it will send measurement data or receive ‘(remote) programming commands’. Setup the Pegasus2 unit with the required call-in schedule.

  • Page 82: Antenna Installation / Cellular Communications Checks

    4.25.1 Selection / Preparation / Initial Placement An antenna should be selected to suit the available space in the chamber, allowing some space for it to be re-positioned (if required). Only use HWM-provided antenna with your logger, to ensure the radio interface meets approvals requirements (safety, etc).

  • Page 83: Antenna / Communication Checks

    Try to avoid placing the antenna in a location where it can be flooded. If this is unavoidable, then place it where the risk is at its minimum. For equipment that is installed in a chamber below ground level, the antenna should be placed above ground level if possible.

  • Page 84: Verification Of The Configuration

    (Details of use of IDT for making these tests are provided in the IDT user-guides). Trouble-shoot a test-call failure if required, using the advice in the IDT app user-guide. Further information is given in the HWM Antenna Installation Guide (MAN-072-0001). 4.26 V...

  • Page 85: Installation (Non-Standard / Latch On Low Unreachable)

    NSTALLATION STANDARD ATCH ON OW UNREACHABLE WARNING: This equipment should be installed, adjusted, and serviced by qualified water industry maintenance personnel familiar with the construction and operation of the equipment and the hazards involved. Failure to observe this precaution could result in damage to the water network.

  • Page 86: Modification Of Latch Settings And Outcomes

    5.2 M ODIFICATION OF ATCH SETTINGS AND OUTCOMES Refer to section 4.20, which discusses latch behaviour. The ‘Latch on Low unreachable setting’ can be used. Refer also to section 2.12.5.2. for an explanation of revised Pegasus2 / PRV operation. Note the warnings against other settings. When plumbed into the upper chamber of the PRV, activation of the Latch will cause the PRV to switch between being regulated under control of the pilot valve or bypass of the pilot valve.

  • Page 87: Installations With Parallel Prvs

    An example application is illustrated below. The Pegasus2 is operating in a standard configuration (without use of the ‘latch’ solenoid). A Hydroswitch unit (available from HWM) controls a latching solenoid (external to Pegasus2). The Hydroswitch itself is controlled by the Pegasus2 unit.
  • Page 88 The Hydroswitch changeover is controlled by the ‘Secondary Time Control’ settings, located with the Setup tab. Enter the required changeover time. Tick the ‘Enable Secondary Control’ box; a table will be shown (PRV switchover table). Edit the table to the required changeover pattern. During operation, the Pegasus2 will cycle through the table values until finished, and then re-start the pattern.
  • Page 89 IDT App users: For – Enable Secondary Control, – Switch Time, – (PRV switchover table) Equivalent controls are located as follows: (main) → Configure Device → Control Settings → Valve Control tab. For – Manual adjustment of Hydroswitch (PRV A & PRV B buttons) –...

  • Page 90: Graphing / Data Download And Preview

    8.1.1 FLOW Meter connection / cable RAG 93 Flow meter pulse unit cable (RAG R93). (Flow meter side: Volt-free) Open Collector (Pegasus 2 side) LINK Contact Closure Connect the cable to the flow meter’s volt-free pulse interface: Use the green wire as ground.

  • Page 91: Maintenance, Service And Repair

    • Batteries are replaceable by a HWM approved service centre or relevantly trained • technician. Batteries can be returned to HWM for disposal. To arrange the return, complete the • on-line RMA form: https://www.hwmglobal.com/hwm-rma/ Refer to the Safety Warnings and Approvals Information for guidelines of the packing requirements.

  • Page 92: Putting The Equipment Into Shipping Mode

    After a few seconds the button will change to red, indicating the PRV control process is now inactive. To put the Pegasus 2 into shipping mode: From within the “Setup” tab, scroll to the end of the settings panels and click on the “Stop Device”...
  • Page 93 The unit will be re-programmed. IDT will warn that the logger device has been stopped. Click “OK” and confirm that the status of “(Stopped)” is shown at the top of the IDT Logger panel. Note: The unit may now be re-packed for shipping or long-term storage.

  • Page 94: Water Ingress

    9.2 W ATER INGRESS If Pegasus Solenoid box is subjected to water pressure exceeding 10 bar it is possible that internal damage may occur, and that water may enter the unit. The equipment may then fill with pressurised water. The unit contains a safety feature if this occurs.
  • Page 95 All images, text and designs are protected by international and UK copywrite law and remain the property of HWM-Water. It is against the law to copy or use any of the content from the HWM website or literature without the written consent of HWM-Water.

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