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.

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2.3 COMMUNICATING WITH PEGASUS 2
To communicate with the Pegasus 2 system a communications cable is required (part-
number COMAE or COMAEUSB) to connect the Control Box to a PC.
The PC also requires a HWM software utility called “Installation and Diagnostic Tool”, or
more commonly known as IDT (PC version).
IDT is introduced in this section but relevant parts of it will also appear at places
elsewhere in the manual.
2.3.1 Download of IDT (PC version)
IDT (PC version) can be downloaded
from the HWM Customer Support
website, or from the following webpage:
https://www.hwmglobal.com/idt-
support/
Note: The user has to be registered by
HWM and have a password to gain
access).
Once installed, an icon will be available
on the PC desktop similar to that shown
opposite:
Launching the program will result in IDT
loading and an initial screen, as shown.
To read the Pegasus 2 device a Comms
cable must first be fitted.
2.3.2 Connecting the Comms Cable
A cable of the type
COMAE/USB
is shown opposite.
Attach the Comms
cable to the
“COMMS /
EXT.BATTERY”
connector of
the Pegasus 2
Control Box.
Connect the other
side of the connector to
the PC.
It is now possible to communicate with the Pegasus 2 system using IDT.

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2.3.3 Loading Pegasus 2 settings into IDT
A progress bar will show across the top of the page. When completed, an information
box will appear stating ‘Device Read Success’. Click “OK” to clear the box.
The IDT-PC program now stores a copy of the unit’s program (settings) in the “current
program” memory area. This copy can be edited.
The unit itself is not updated with any of the program changes unless the user later
saves the settings stored in IDT back to the Pegasus 2 Control unit by
clicking on the ”Setup Device” button in IDT.
Some buttons in IDT will however issue commands to Pegasus that can change its
operation immediately; others are to control operations of the IDT program.
Click ‘Read Device’.

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IDT will now display 4 tabs.
Within any tab, information is divided into
various areas, or “panels”.
The “Setup” tab is used for displaying:
•Details of the Pegasus 2 unit.
•The current program settings of the
unit.
The panel labelled “Logger” shows:
•The software version running on the
unit (here it is shown as V4.88).
•Whether the logger built into the unit
is:
o(Stopped).
o(Waiting).
o(Recording).
•The control unit’s serial number.
•The telephone number of the device does not depend on the SIM card fitted to the
unit.
•The logger date and time … this is the local time for wherever the logger is installed.
The offset of local time from GMT (or UTC) is shown in brackets.
Any greyed-out fields indicates the user cannot adjust them, typically for factory-set
parameters. Any non-greyed areas indicate the user can edit the field.
The user can insert a “Site-ID” for this location, which is in the format of a 7-digit
reference number.
Other panels (not shown here) follow-on, with settings for various areas of the unit’s
functionality.
The “Hardware Test” / “Data Collection” / ”PRV Installation” tabs shown in the above
image provide access to information, settings and control functions available in
Pegasus 2 and will be explained later in this manual.
e.g. The “PRV Installation” tab is used during installation.
It can provide live transducer data or manual over-ride controls for various
components of the system.

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2.3.4 Saving settings from IDT into Pegasus 2
When Pegasus is shipped from the factory it is put into a “Shipping Mode” (see section
7.1.2); most functions are deactivated, including the built-in logger, but the unit will
detect communications from the IDT tool.
After reading (copying) the current program settings into IDT, the user can modify them
(as explained within this manual) and then update the Pegasus by writing back the
settings into the unit. This action can also be
used to activate the built-in logger.
The running status of the built-in logger is
shown on the top line of the Logger panel
(within the setup tab), as shown.
Here, it is shown as “Stopped”.
The process of writing settings into a stopped
logger will cause it to schedule a re-start.
The re-start timing is determined by a setting
within the Setup tab. Select “Start Logging
immediately”.
Scroll to the bottom of the Setup tab and click the “Setup Device”
button.
IDT may warn you that there may be some
unintended errors in your settings
(e.g. see opposite); Since we have not yet set
these parameters but will do so later, click “Yes”.

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If the PRV control function of Pegasus has not yet been
started, IDT will ask if you wish to start it now.
Since we have not yet set these parameters but will do
so later, click “No”.
IDT reports that the unit has been given the new settings
successfully.
The logger functions have been set to start at
a convenient time.
The logger is “Waiting”for the recording start time
to arrive.
The logger will later begin “Recording”; this is its
regular repetitive task.
Note: The states for the built-in logger (Stopped, Waiting, Recording) have no effect on
the PRV controller operation.
“Last Stop Time” and “Last Restart Time” show
when the logger was last stopped and re-started,
respectively.

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2.4 PEGASUS 2CONTROL BOX –DESCRIPTION
Pegasus 2 control box is a combination of a PRV controller and a built-in data-logger.
2.4.1 Logger functions
At the appointed time, the built-in logger will go into the state of “Recording” and begin
repetitive logging.
The logger should be set to 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; refer to the model-number scheme (shown
later).
After taking several measurement samples, some statistical functions can be optionally
applied to produce a datapoint that is logged (saved); a “point measurement” (a single
data sample) can alternatively be saved. The rate at which these are recorded is known
as the “log period”, which is always a multiple of the “sample period”.
The datapoints are stored in the memory of the unit. The unit calls into the cellular data
network in order to contact the server; the data is then uploaded.
An installer can also download a copy of the data into the IDT tool for analysis on-site.
The logger can be programmed to monitor data for certain patterns or conditions and
to send a message to the server if it should detect a match. Commonly, this is used for
setting a condition to be detected by the unit that can be an indication of an “alarm”.
The logger makes measurements (as described above) into an area of memory which is
referred to as the “primary recording”. If the logger has the feature enabled, it can also
be set to occasionally save data into a “secondary recording” memory area, sampled at
a higher frequency. This is not available on all supplied units and must be arranged
through your sales representative before placing an order; it has implications
concerning expected battery life of the unit.
2.4.2 PRV Control functions
The unit is shipped from the factory in a low-power mode referred to as “Shipping
mode” (see section 7.1.2). The PRV controller is shipped in a nonactive state, (shown
within IDT as “No Control”). The installer must activate PRV control at a suitable point
during installation by putting the device into the “Start Control” state.
The state of the PRV controller operation has no effect on the built-in logger operation.
Operation of the system is described later, in section 2.9.

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2.4.3 Controller Description
The Control Box unit directs the operation of the Solenoid Box
unit. It contains inputs from all transducers, from which it makes
decisions about how the system should respond to the current
operating conditions.
The Control Box, shown opposite, contains:
•A quick-release connector for a water-pressure transducer
(or an electrical interface for an external transducer) that
measures the inlet side of the PRV (upstream pressure).
•A quick-release connector for a water-pressure transducer
(or an electrical interface for an external transducer) that
measures the outlet side of the PRV (downstream pressure).
•An electrical interface for a flow meter. This measures the
rate of flow of water through the PRV.
•An electrical interface to the Pegasus 2 Solenoid Box.
•A connector for attachment of an Antenna for the cellular
data network.
•A connector for communications and the external battery
power option.
•(Optional) additional interfaces; 0 up to a maximum of 2.
e.g. An interface for other sensors or a Hydroswitch unit.
The front of the Control Box includes a part-number,
an example of which is shown opposite:
The part-number describes the content of the unit, as follows ...
Model Number(s) Description
C163C / * / * / * / * Pegasus 2 Controller
(Reserved by HWM for other options).
Electrical options.
Pegasus 2 Control Box unit.

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“Electrical options” is a 6-character field, as follows:
c c c c c c (character positions 1 to 6)
Pressure input (key):
3 –External Pressure sensor (electrical interface).
6 –Internal Pressure sensor (10-bar) with quick-release connector for water.
Water Flow input (key):
1 –Digital Flow (Meter pulse) Input.
Maximum of 128 pulses / second from a volt-free output.
Additional Options (key):
0 –(Option Not Fitted).
H –HydroSwitch interface (alternatively can be used as a digital Status output).
I –Electrical Interface (I2C).
M –Electrical Interface (Modbus).
5 –Analogue (4-20mA) Flow input (Passive).
S –Status Input.
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).
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

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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
a Hydroswitch
interface is
shown opposite.
(The
Hydroswitch
interface, shown
in dotted lines,
is unlabelled).
2.5 SOLENOID BOX -DESCRIPTION
The Solenoid Box operation is directed by the Control Box unit.
The Solenoid Box receives instructions from the Control Box via an interconnecting
cable. The Solenoid box contains a set of solenoids which are connected to internal
pipework. The pipework also connects to various water hose connectors presented on
one side of the unit; these are for making connections to the external plumbing.
Each connector is labelled according to its standard use.

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The Solenoid Box, shown opposite, contains:
•A set of hose connectors for connection to water-pipes
required for the installation.
•An electrical interface to the Pegasus 2 Solenoid Box.
•(Optional) additional interfaces for Hydroswitch units.;
(0 up to a maximum of 2).
•An (optional) additional internal solenoid, known as a
“latching solenoid”.
The front of the Control Box includes a part-number,
an example of which is shown below:
The part-number describes the content of the unit, as follows ...
Model Number(s) Description
C163S/ * / * Pegasus 2 Controller
“Fitted options” is a 4-character field, as follows:
c c c c (character positions 1 to 4)
Solenoid type (key):
L –Latching Solenoid (standard); referred to as a “Latching unit”.
N –Latching solenoid is absent; referred to as a “Non-latching unit”.
(Reserved by HWM for other options).
Fitted options.
Pegasus 2 Solenoid Box unit.
(reserved)
Hydroswitch (number of interfaces).
Battery Fitment option.
Solenoid type.