HWM Pegasus 2 User manual

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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-A December 2020

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TABLE OF CONTENTS
1System Documentation and Support of Product ...........................................................5
1.1 Documentation and Technical support ...................................................................5
1.2 Safety ..........................................................................................................................5
2Overview ............................................................................................................................6
2.1 Introduction................................................................................................................6
2.2 Server integration option: DataGate and PressView Websites ............................10
2.3 Communicating with Pegasus 2 .............................................................................11
2.3.1 Download of IDT (PC version) ..........................................................................11
2.3.2 Connecting the Comms Cable .........................................................................11
2.3.3 Loading Pegasus 2 settings into IDT ...............................................................12
2.3.4 Saving settings from IDT into Pegasus 2 ........................................................14
2.4 Pegasus 2 Control Box –Description .....................................................................16
2.4.1 Logger functions ...............................................................................................16
2.4.2 PRV Control functions ......................................................................................16
2.4.3 Controller Description......................................................................................17
2.5 Solenoid Box - Description......................................................................................19
2.6 Hydroswitch - Description.......................................................................................22
2.7 Mechanical Actuator ................................................................................................22
2.8 Summary of PRV Function (Pilot operated) ...........................................................23
2.8.1 Main valve .........................................................................................................23
2.8.2 Pilot Valve operation ........................................................................................23
2.8.3 Pilot operated pressure reducing valve..........................................................24
2.9 PRV Function (under Pegasus 2 control)................................................................25
2.9.1 Pegasus 2 Mechanical Actuator.......................................................................25
2.9.2 Pegasus 2 System options: (Basic and “Latching” models) ...........................25
2.9.3 Theory of operation (continuous pressure modulation) ..............................27
2.9.4 Theory of operation (Continuous pressure modulation + Latch).................29
3Configuration options (diagrams)..................................................................................33
3.1 Key to components within the diagrams ...............................................................33
3.2 Standard installations: Continuous pressure control ...........................................36
3.2.1 Using: internal transducers (Pressure in < 90m)............................................36
3.2.2 Using: external transducers (Pressure in < 90m)..........................................37
3.2.3 Using: internal transducers (Pressure in > 90m)............................................38

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3.2.4 Using external transducers (Pressure in > 90m)............................................39
3.3 Standard Installation + High Pressure Unreachable.............................................40
3.3.1 Using: Latch solenoid / internal transducers (Pressure in < 90m)) ..............40
3.3.2 Using: Latch solenoid / external transducers (Pressure in > 90m)..............41
3.3.3 Using: Latch solenoid / internal transducers (Pressure in < 90m) ...............42
3.3.4 Using: Latch solenoid /external transducers (Pressure in > 90m)................43
3.4 (Other Installation Options) ....................................................................................44
3.4.1 Latch on Low pressure unreachable...............................................................44
3.4.2 Models with additional Data Logging interfaces............................................44
4Installation procedure ....................................................................................................45
4.1 Position Control and Solenoid boxes / Link with cable.........................................46
4.2 Connection to the Flow meter ................................................................................47
4.3 Connect External Pressure transducers to Pegasus 2..........................................47
4.4 Check / modify Pegasus 2 channel settings...........................................................48
4.5 Re-zero Pressure transducers.................................................................................54
4.6 Prepare the pipework for the Pegasus 2 ...............................................................56
4.7 Prepare the PRV for Pegasus Pressure transducers.............................................57
4.8 Connect Pegasus2 side pipework...........................................................................58
4.9 Connect transducers and basic control pipework on PRV side ...........................59
4.10 Bleed air from the pipework ...................................................................................59
4.11 Test Pressure transducers ......................................................................................60
4.12 Preparing to fit the actuator ...................................................................................61
4.13 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 - Bleed air from the pipework ..........................................................66
4.18 Latch option - Testing ..............................................................................................67
4.19 Testing the Actuator ................................................................................................67
4.20 PRV Control method and Settings ..........................................................................68
4.20.1 Setup of pressure control using a Time profile..............................................70
4.20.2 Setup of pressure control using a Flow profile ..............................................72
4.20.3 Setup of pressure control using a combined Time and Flow profile ...........74
4.21 Setup for annual time adjustments........................................................................75
4.22 Save Program / Activating Pegasus PRV control ...................................................75

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4.23 Setting Logger Startup / Measurement Sample Rates..........................................77
4.24 Setup of Data Delivery.............................................................................................78
4.24.1 Call-in times (schedule and protocol) .............................................................78
4.24.2 Destination........................................................................................................79
4.24.3 Setting Network access parameters ...............................................................80
4.25 Communications / Antenna location check. ..........................................................81
4.26 Verification of the configuration.............................................................................83
4.27 Protection from Frost ..............................................................................................83
5Graphing / data download and preview........................................................................84
5.1 Manual download of data into IDT / Preview as a graph .....................................84
6Connection Information .................................................................................................86
6.1.1 FLOW Meter connection / cable RAG 93.........................................................86
7Maintenance, Service and Repair...................................................................................87
7.1.1 Return of product for Investigation, Service. Or Repair: ...............................87
7.1.2 Putting the equipment into Shipping Mode...................................................88
7.2 Water ingress ...........................................................................................................89

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1SYSTEM DOCUMENTATION AND SUPPORT OF PRODUCT
1.1 DOCUMENTATION AND TECHNICAL SUPPORT
Thank-you for choosing a HWM device. We trust it will provide you with many years of
service.
The Pegasus 2 system is designed to control the outlet pressure from a clean-water
pressure reducing valve.
This user-guide provides details of each component of the Pegasus 2 system and also
the system itself, (including alternative configuration options). It provides details of how
to install the product in a stand-alone mode and also (optional) integration with the
HWM DataGate system, providing on-line viewing of pressure measurements.
This user-guide covers the following models:
Model Number(s) Description
C163C/*/*/*/* Pegasus 2 Controller unit
C163S/*/* Pegasus 2 Solenoid unit
C163F/*/*/*/* A kit of individual units plus additional components to
make a complete Pegasus 2 system.
Note: The part-number structure is also shared with the “Sentinel 2” family of models.
For Sentinel 2, refer to the Sentinel 2 user-guide.
Note: The system periodically has new features and changes released, thus you may
observe slight changes in layout from those shown in this manual.
Additionally, views can vary depending on what user-role you have been
given and its permissions.
HWM provides support of the Pegasus 2 system by means of our customer support
webpages: (Note: Customer registration is required to access).
https://www.hwmglobal.com/help-and-downloads/
Should you have any questions that are not covered by this manual or the system’s
online help, please contact the HWM Technical Support team on [phone],
or email [e-mail]
1.2 SAFETY
Before continuing, please read the “Safety Warnings and Approvals Information”
document supplied with the product.

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2OVERVIEW
2.1 INTRODUCTION
Pegasus 2 is a system, provided by HWM-Water, that is designed to control the outlet
pressure of a pressure reducing valve (PRV) within a clean-water supply pipe network.
This section gives an overview of Pegasus 2, the equipment that is required to use it,
and other (optional) system elements.
The system is designed to control pressure reducing valves that are designed and
manufactured by 3rd party suppliers. Therefore, only general details of PRV valve
construction are included in this manual.
Pressure control can be either:
•Continuous control:
i.e. Incremental adjustment of pressure, between a maximum and minimum;
The Pegasus 2 product is ideal for this situation.
or
•2-point control:
i.e. Automatic switching between two pre-set pressure levels.
The Sentinel 2 product is ideal for this situation.
…It is a simplified product, based on the Pegasus 2.
It does not use the Solenoid Box; a Hydroswitch unit is used.
(Refer to the Sentinel 2 manual for further details).
Pegasus 2 allows incremental adjustment of the PRV output pressure to closely follow a
pre-determined pressure profile.
The pressure profile can be based on:
•The time of day, or
•The flow rate (demand) of water, or
•Both of the above.
The pressure profiles are defined by a set of tables within the unit. The tables can be
entered manually during installation. Pegasus 2 can also communicate with a central
server that is used to store its measurement data. The server can be configured to
analyse the effectiveness of the Pegasus 2 pressure control and (if required) remotely
update the unit’s pressure profiles.
The system also offers a fail-safe mode, where it can operate the PRV at a fixed outlet
pressure when certain fault conditions occur (e.g. detection of a sensor failure).

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A Pegasus 2 system offers:
•Real-time clock.
•Water resistant housing with IP68 protection (totally submersible).
•Battery life of up to 5 years in normal operating conditions; batteries are
replaceable (see section 7).
•A manual over-ride option to assist with installation and tests.
•A built-in data-logger.
•Communication via a communications cable to the USB port of a laptop PC.
•Communication using a connection over radio to the cellular phone network.
•Optional integration with a remote server for data storage and remote
adjustment.
The Pegasus 2 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.
•An accessory kit for plumbing-in the Pegasus 2 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
(For optional server integration).
•(Optional / If required) External battery.
•A USB Communications cable (an accessory required for on-site installation,
programming, and data retrieval).
The system contains several transducers for measurement of water pressure. These
may be built-in (for direct connection to the system via water pipes) or (where external
transducers employed) attached via cables.
The system operates from internal batteries or (optional) using an
additional external HWM battery unit (see opposite).
Where supplied, the external battery power is used to extend the
battery life of the system.

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Caution: (Pegasus 2 compatibility with Pegasus Plus)
The Pegasus 2 System REPLACES previous generations of HWM pressure control
systems, known as Pegasus and Pegasus Plus.
Pegasus 2 control box and solenoid box units are not compatible with Pegasus or
Pegasus Plus units; the units cannot be used inter-changeably or mixed.
The Pegasus 2 (complete system) can replace a Pegasus or Pegasus Plus (complete
system), depending on the model numbers and settings of the units.
Existing sensors and pipework may be compatible, and may be re-used with a Pegasus
2 installation if in good condition.
The cable between the Control Box and Solenoid box is incompatible between old
systems and Pegasus 2.
The Pegasus Plus USB Communications cable is also compatible with Pegasus 2.
The Pegasus 2 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 Pegasus 2
system installed
is shown opposite.
Several
configuration
alternatives exist,
depending on the
required system
behaviour.
The model number
of each unit must be
selected to match
the requirements of
the installation.
In addition, the
standard
configurations must not be used in high pressure situations (>90 meters) to prevent
damage to the system components. An alternative system configuration (plumbing
scheme) must be used.

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An example installation accessory
kit, the actuator, and brackets are
shown above and opposite.

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2.2 SERVER INTEGRATION OPTION:DATAGATE AND PRESSVIEW WEBSITES
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.
The PressView website allows the Pegasus 2 data to be combined with pressure
measurements made (by another HWM logger device) some distance down-stream of
the PRV (e.g. at a “critical point”). Both the local and remote measurements can be
assessed by the server, and (whenever an adjustment is needed) revised pressure
profiles sent to the Pegasus 2 unit. PressView supports both “Learning” and “Active”
(closed loop) modes of operation. These features are not covered further in this
document; refer to the User-Guide for PressView for more details.
The Pegasus 2 can also send any fault notifications (alarms) to the server for forwarding
to interested parties.
The data can be viewed remotely / graphically by
anyone with a suitable user account (and password)
using a standard web-browser.