Astrapool Viron P320 XT User manual

Viron xt
pumps
INST 434
INSTALLATION MANUAL
FOR YOUR SAFETY - This product must be installed and serviced by a licensed electrician in accordance with the
latest applicable version of AS/NZS 3000, along with any other applicable local and national installation codes/
standards”, and any other local applicable regulations. Before installing this product, read and follow all warning
notices and instructions that accompany this product. Failure to follow warning notices and instructions may
result in property damage, personal injury, or death. Improper installation and/or operation will void the warranty.
Improper installation and/or operation can create unwanted electrical hazard which can cause serious injury,
property damage, or death.
WARNING
(all models)

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For full warranty terms and conditions and to register your
warranty, simply visit www.astralpool.com.au/warranty
and complete your details. Or scan the QR code and be
taken directly to the registration page.
Record your equipment details here for quick reference:
Model No.: ________________________________
Serial No.: ________________________________

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Table of Contents
Section 1. Important Safety Instructions ...........4
Section 2. General Information.............................. 7
2.1 Technical Assistance................................................................7
2.2 General Operation Description...........................................7
2.3 Flow Rate Specification..........................................................7
2.4 Dimensions.................................................................................7
Section 3. Getting Started ....................................... 8
3.1 Contents ......................................................................................8
3.2 Technical Specifications.........................................................8
3.3 Required Equipment...............................................................8
Section 4. Installation................................................9
4.1 Pump Location..........................................................................9
4.2 Pump Installation.................................................................. 10
4.3 Water Connections ............................................................... 12
4.4 Electrical Connections......................................................... 12
Section 5. Operation................................................14
5.1 Normal Operation................................................................. 14
5.2 Starting Up the Pump.......................................................... 14
5.3 Pump Lid Removal................................................................ 14
5.4 Conduct Pressure Test ......................................................... 15
Section 6. Viron XT Pump Controls ....................16
6.1 Viron XT Pump Control Panel............................................ 16
6.2 Speed Selections ................................................................... 16
6.3 Programming.......................................................................... 17
6.4 XT Pumps and Other Products......................................... 19
Section 7. Maintenance..........................................21
7.1 Routine Maintenance .......................................................... 21
7.2 Winterizing the Pump.......................................................... 21
7.3 Maintenance Schedule........................................................ 22
Section 8. Troubleshooting...................................23
8.1 Fault Codes.............................................................................. 23
Section 9. Spare Parts..............................................24
9.1 Model P320XT and P520XT ............................................... 24
9.2 Model P320XT and P520XT Spare Parts List................ 25
Section 10. Viron XT Pump Control Flow
Diagram...................................................26
Section 11. Performance Curves............................27
11.1 Model P320XT ........................................................................ 27
11.2 Model P520XT ........................................................................ 27

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Section 1. Important Safety Instructions
READ AND FOLLOW ALL INSTRUCTIONS
All electrical work must be performed by a licensed electrician and conform to all national, state, and local
codes. When installing and using this electrical equipment, basic safety precautions should always be followed,
including the following:
WARNING
To reduce the risk of injury, do not permit children to use this product.
WARNING
A check valve can interfere with the proper operation of certain Suction Vacuum Release System
(SVRS) products. To avoid possible entrapment hazard, serious injury, or death, make sure to review
the operation/owners manual of your particular SVRS product before installing the check valve.
WARNING
RISK OF SUCTION ENTRAPMENT HAZARD, WHICH, IF NOT AVOIDED, CAN RESULT IN SERIOUS
INJURY OR DEATH. Do not block pump suction, as this can cause severe injury or death. Do not
use this pump for wading pools, shallow pools, or spas containing bottom drains, unless the pump is
connected to at least two (2) functioning suction outlets. Drain covers must be certied to the latest
published edition of ANSI/ASME A112.19.8 or it’s successor standard ANSI/APSP-16. In Australia
AS1926.3 is also an acceptable standard.
WARNING
To reduce the risk of property damage or injury, do not attempt to change the backwash (multiport, slide,
or full ow) valve position with the pump running.
WARNING
AstralPool Pumps are powered by a high-voltage electric motor and must be installed by a licensed or
certied electrician or a qualied swimming pool service technician.
WARNING
Incorrectly installed equipment may fail, causing severe injury or property damage.
WARNING
The pump is for xed installations only and to be used in conjunction with swimming pool equipment.
(e.g. lters). The pump is to be installed in accordance with the relevant requirements of the Australian
wiring rules AS/NZS 3000. Also refer to the installation instructions relating to the swimming pool
equipment for which the pump will be an integral part. The pump is to be supplied through a residual
current device (RCD) with a rated residual operating current of 30mA. If the supply cord is damaged it
must be replaced by the manufacturer or its service agent or similarly qualied person in order to avoid
hazard.
WARNING
• Do not connect system to an unregulated city water system or other external source of pressurized
water producing pressures greater than 250 KPA (35 PSI).
• Trapped air in the system can cause the lter lid to be blown off, which can result in death, serious
personal injury, or property damage. Be sure all air is out of the system before operating.

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SAVE THESE INSTRUCTIONS
CAUTION
This pump is for use with permanently installed pools and may also be used with hot tubs and spas, if so
marked. Do not use with storable pools. A permanently installed pool is constructed in or on the ground
or in a building, such that it cannot be readily disassembled for storage. A storable pool is constructed
so that it may be readily disassembled for storage and reassembled to its original integrity.
CAUTION
Do not install beneath the skirt of a hot tub. The pump requires adequate ventilation to maintain air
temperature at less than the maximum ambient temperature rating listed on the motor rating plate.
WARNING
Chemical spills and fumes can weaken pool/spa equipment. Corrosion can cause lters and other
equipment to fail, resulting in severe injury or property damage. Do not store pool chemicals near your
equipment.
CAUTION
Do not start pump dry! Running the pump dry for any length of time will cause severe damage and will
void the warranty.
WARNING
To minimize risk of severe injury or death, the lter and/or pump should not be subjected to the piping
system pressurization test.
Local codes may require the pool piping system to be subjected to a pressure test. These requirements
are generally not intended to apply to the pool equipment, such as lters or pumps.
AstralPool pool equipment is pressure tested at the factory.
If, however, the WARNING cannot be followed and pressure testing of the piping system must include
the lter and/or pump, BE SURE TO COMPLY WITH THE FOLLOWING SAFETY INSTRUCTIONS:
• Check all clamps, bolts, lids, lock rings, and system accessories to ensure they are properly installed
and secured before testing.
• RELEASE ALL AIR in the system before testing.
• Water pressure for test must NOT EXCEED 250 KPA (35 PSI).
• Water temperature for test must NOT EXCEED 38°C (100°F).
• Limit test to 24 hours. After test, visually check system to be sure it is ready for operation.
Notice: These parameters apply to AstralPool equipment only. For non-AstralPool equipment, consult
the equipment manufacturer.

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WARNING
SUCTION HAZARD. Can cause serious injury or death. Do not use this pump for wading pools,
shallow pools, or spas containing bottom drains, unless pump is connected to at least two (2)
functioning suction outlets.
WARNING
Pump suction is hazardous and can trap and drown or disembowel bathers. Do not use or
operate swimming pools, spas, or hot tubs if a suction outlet cover is missing, broken, or loose.
The following guidelines provide information for pump installation that minimizes risk of injury to users of
pools, spas, and hot tubs:
Entrapment Protection - The pump suction system must provide protection against the hazards of
suction entrapment.
Suction Outlet Covers - All suction outlets must have correctly installed, screw-fastened covers in
place. All suction outlet (drain) covers must be properly maintained. They must be replaced if cracked,
broken, or missing. Drain covers must be listed/certied to the latest published edition of ANSI®/ASME®
A112.19.8 or its successor standard, ANSI/APSP-16. In Australia, AS1926.3 is also an acceptable
standard. The pool must be shut down and bathers must be restricted from entering the pool until any
cracked, broken, or missing drain covers are replaced.
Number of Suction Outlets Per Pump - Provide at least two (2) hydraulically-balanced suction outlets,
with covers, as suction outlets for each circulating pump suction line. The centers of the suction outlets
(suction outlets) on any one (1) suction line must be at least three (3) feet apart, centre to centre. See
Figure 1.
The system must be built to include at least two (2) suction outlets (drains) connected to the pump
whenever the pump is running. However, if two (2) suction outlets run into a single suction line, the
single suction line may be equipped with a valve that will shut off both suction outlets from the pump.
The system shall be constructed such that it shall not allow for separate or independent shutoff or
isolation of each drain. See Figure 1.
Additional pumps can be connected to a single suction line as long as the requirements above are met.
Water Velocity - The maximum water velocity through the suction outlet assembly and its cover for any
suction outlet must not exceed the suction outlet assembly and its cover’s maximum design ow rate.
The suction outlet (drain) assembly and its cover must comply with the latest version of ANSI®/ASME®
A112.19.8, the standard for Suction Fittings For Use in Swimming Pools, Wading Pools, Spas,and Hot
Tubs, or its successor standard, ANSI/ASME APSP-16. In Australia, AS1926.3 is also an acceptable
standard.
Testing and Certication - Suction outlet covers must have been tested by a nationally recognized
testing laboratory and found to comply with the latest published edition of ANSI/ASME A112.19.8 or
its successor standard, ANSI/APSP-16, the standard for Suction Fittings For Use in Swimming pools,
Wading Pools, Spas, and Hot Tubs. In Australia, AS1926.3 is also an acceptable standard.
Fittings - Fittings restrict ow; for best efciency use fewest possible ttings (but at least two (2) suction
outlets).
Avoid ttings that could cause an air trap.
Pool cleaner suction ttings must conform to applicable International Association of Plumbing and
Mechanical Ofcials (IAPMO) standards.

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Section 2. General Information
This manual provides installation and operation
instructions for the AstralPool Viron XT pumps.
Read the installation and operation instructions
completely before proceeding with the
installation.
2.1 Technical Assistance
Web: www.astralpool.com.au Phone: [phone]
2.2 General Operation Description
Ideal for the average sized pool, the P320 XT has a
flow rate sufficient to back wash up to 30”or 800mm
diameter sand filters, provide a powerful vacuum
when cleaning the pool and drive up to 6 spa jets.
The large liquid crystal display clearly shows the RPM
of the motor and enables adjustment of the start up
priming time, priming flow rate, and visual display
of each speed setting. The inbuilt 24 hour timer is
easily enabled and provides up to four time periods
each day with different speed settings to provide the
perfect flow rate for your pool. In addition, special
applications such as in floor cleaning or programming
water features are enabled using the time clock and
speed selection for different times of day.
The P520 XT provides high flow and high pressure and
also incorporates electronic power factor correction
which provides even further reductions in power
consumption, even on maximum speed.
• Continuous duty rated motor
• Precision reinforced moulded high head impeller,
giving extra performance
• Single piece moulded body for added strength and
longer life
• Rapid priming diuser quickly corrects loss of water
ow
• Quick and easy disassembly for servicing
• Large capacity basket with easily removed ramp on lid
• Ability to adjust factory pre-set speeds for optimum
water ow and maximum energy savings for your pool
and its equipment.
• Double Insulated water circuit for maximum electrical
protection
2.3 Flow Rate Specification
Model P320 XT P520 XT
High Flow Rate
(2850 RPM)
320 lpm 520 lpm
Medium Flow Rate
(2000 RPM)
206 lpm 426 lpm
Low Flow Rate
(1325 / 1125 RPM)
128 lpm 200 lpm
2.4 Dimensions
252mm
338mm
Figure 1. Front Dimensions
217mm
289mm
646mm
266mm
Figure 2. Side Dimensions

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Section 3. Getting Started
Install the Viron XT Pump in accordance with the
procedures in this manual, local codes and ordinances,
and in accordance with the latest edition of the
appropriate national code. See Section 4.2.
This manual provides the information needed to meet
these requirements. Review all applications and
installation procedures before continuing the
installation.
3.1 Contents
Before starting, check that you have the correct parts as
indicated in Table 1. If any parts are missing or incorrect,
please call your local distributor or technical support at
1300 186 875 for assistance.
2
3
Low HighMedium
ENTER
MENU
auto
1
2* 3*
4*
* XT pump shown with union nut, union tail and o-rings installed.
Figure 3. Viron XT Pump Components
Item Description Quantity
1Viron XT Pump 1
250 mm Union Nut 2
350mm Universal Union Tail 2
450mm Universal Union O-ring 2
Table 1. XT Pump Parts
3.2 Technical Specifications
• Power: P320 XT - .75 Kw output, 240V 50 Hz, 4.1 Amp,
max speed 2850 rpm; P520 XT - 1.5 Kw output,240V
50 Hz, 6.0 amp, max speed 2820 rpm
•         
25 rpm step)
• 
• 
•         

• 

• 
3.3 Required Equipment
Please ensure that the following equipment is
available to the installer at the time of installation.
3.3.1 Required Tools
Safety Eye Wear Gloves Philips
Screwdriver
Flathead
Screwdriver
Pipe Wrench Adjustable
Wrench
5mm (3/16”)
Hex Key
Multi Grips Digital Dierential
Manometer
Voltage Meter PVC Pipe Cutter
Tape Measure
Power Drill
Figure 4. Required Tools

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Section 4. Installation
4.1 Pump Location
WARNING
To Reduce the Risk of Fire, install pool equipment in an area
where leaves or other debris will not collect on or around
the equipment. Keep surrounding area clear of all debris
such as paper, leaves, pine-needles and other combustible
materials.
AstralPool recommends installing the pump within
30 cm (1 ft) above water level. The pump should not
be elevated more than 152 cm (5 ft). If the pump is
located below water level, isolation valves (check
valves) must be installed on both the suction and
return lines to prevent back flow of pool water during
any routine or required servicing.
WARNING
A check valve can interfere with the proper
operation of certain Suction Vacuum Release
System (SVRS) products. To avoid possible en-
trapment hazard, serious injury, or death, make
sure to review the operation/owners manual of
your particular SVRS product before installing the
check valve.
NOTE: When the pool equipment is located below the
pool surface a leak can result in large scale water
loss or ooding. AstralPool cannot be responsible
for such water loss or ooding or damage caused
by either occurrence.
1. Install the pump such that any disconnecting means
and/or junction boxes for power connection are within
sight of the pump and at least ve feet horizontally
from the edge of the pool and/or spa. Choose a
location that will minimize turns in the piping.
2. Place the pump on a solid foundation that will not
vibrate. To further reduce the possibility of vibration
noise, bolt the pump to the foundation.
3. Ensure that the foundation has adequate drainage to
prevent the pump motor from getting wet.
4. Make sure the pump has the proper ventilation to
prevent the motor from overheating. Overheating due
to lack of cooling voids warranty.
5. Allow plenty of space for any maintenances by leaving
a clear area around the pump.
6. Provide adequate lighting if the equipment is in a
potentially dark area.
Pipe Size Maximum Flow Suction
(6 feet per second)
Maximum Flow
Discharge
(8 feet per second)
38 mm
(1½”)
140 LPM
(37 GPM)
189 LPM
(50 GPM)
51 mm
(2”)
235 LPM
(62 GPM)
322 LPM
(85 GPM)
64 mm
(2½”)
333 LPM
(88 GPM)
454 LPM
(120 GPM)
76 mm
(3”)
515 LPM
(136 GPM)
697 LPM
(184 GPM)
102 mm
(4”)
886 LPM
(234 GPM)
1185 LPM
(313 GPM)
4.1.1 Installation Recommendations
1. To help prevent diculty in priming, install the suction
pipe without high points (above inlet of pump -
inverted “U”s, commonly referred to in plumbing as an
airlock) that can trap air. For installations of equipment
up to 30 m (100 ft) from the water, refer to Table 1, the
pipe sizing chart. For installations of equipment more
than 30 m (100 ft) from the water, the recommended
pipe size must be increased to the next size.
Bad Installation
(Air Lock)
Bad Installation
(90° Elbow Too Close)
Figure 5. Viron XT Pump Incorrect Piping Installations

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Good Installation
(4x Pipe Diameter Into Pump)
Best Installation
(Sweep Elbows for Maximum Eciency)
Figure 6. Viron XT Pump Good Piping Installations
Top Clearance
BOP 150mm Minimum
From Top of Lid
5x
Pipe
Diameter
Figure 7. Viron XT Pump Piping Clearance
2. The unions on both the suction and discharge ports
simplify installation and service while eliminating the
possibility of leaks at threaded adapters.
3. The pump must be connected to at least two
hydraulically-balanced main drains for each pool pump
suction line. Each drain (suction outlet) assembly
must be provided with covers and must be listed or
certied to the latest published edition of ANSI®/ASME®
A112.19.8, or its successor standard, ANSI/APSP-16. The
suction ttings of the main drains must be at least 1 m
(3 ft) apart, center to center, or on dierent planes. The
suction ttings can be a drain and skimmer, two drains,
two skimmers, or a skimmer with an equalizer line
installed. Check the local codes for proper installation.
NOTE To prevent entrapment, the system must be built so
it cannot operate with the pump drawing water from
only one main drain. At least two main drains must
be connected to the pump when it is in operation.
However, if two main drains run into a single suction
line, the single suction line may be equipped with
a valve that will shut o both main drains from the
pump.
4. The piping must be well supported and not forced
together where it will experience constant stress.
5. Always use properly sized valves. Jandy Diverter Valves
and Ball Valves typically have the best ow capabilities.
6. Use the fewest possible ttings and limit the use of
90 degree elbows. Each additional tting or length
of pipe increases resistance to ow which makes the
pump work harder.
NOTE If more than ten suction ttings are needed, the
pipe size must be increased.
7. Every new installation must be pressure tested
according to local codes.
4.2 Pump Installation
WARNING
AstralPool pumps are powered by a high voltage
electric motor and must be installed by a licensed
or certified electrician or a qualified swimming pool
service technician.
When installing the appliance, ensure all parts are
installed in the correct zone in accordance with the
wiring rules. In particular refer to AS/NZS 3000
(Australia) and EN 60364 (EU).
• Install on a stable, solid (concrete slab for example)
and level surface.
• Screw the pump (and the base(s) if applicable) to
the ground using suitable lag-screws.

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Figure 8. Typical Water Piping Conguration
MAIN DRAINS*
(Suction Outlet)
EXTERNAL MANUAL
BYPASS VALVE
HEATER
FILTER
CHECK VALVE
(Always install a corrosion resistant check
valve when any sanitation equipment,
including erosion feeders and salt
chlorination systems are installed,
see section 5.4
for more details)
PUMP
POOL/SPA
3 WAY VALVE
SPA DRAIN*
(Suction Outlet)
SKIMMER
SPA RETURN
POOL
RETURN
a.
a.
EXTERNAL MANUAL
BY-PASS DETAIL:
USE WHEN FILTRATION RATE
EXCEEDS 500 lpm (132 gpm). REFER
TO THE MANUFACTURER’S
RECOMMENDATIONS IF USING A
DIFFERENT BRAND HEATER.
*All pool suction outlets and plumbing
must be properly installed in compliance
with applicable entrapment protection
standards such as AS2610.2
Listed/certified to the latest
published version of
ANSI/ASME A112.19.8 or
its successor standard,
ANSI/APSP-16.
Anti-entrapment
Cover/Grate or Suction
Fitting, securely-fastened
to Main Drain Sump
Listed/certified to the latest
published version of
ANSI®/ASME®A112.19.8 or
its successor standard,
ANSI/APSP-16.
Anti-entrapment
Cover/Grate or Suction
Fitting, securely fastened to
Main Drain Sump
At Least
3 Feet
Suction Outlet
(Main Drain)
Suction Outlet
(Main Drain)
Valves permitted only after tee Pump
No valves between
Tee and Main Drains
Skimmer
Figure 9. Number of Suction Outlets Per Pump

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4.3 Water Connections
The heater should always be installed after the pump
and filter. The water connections are located on the
right hand side of the heater. The inlet and outlet
are clearly marked. Water connections must be
completed in 50 mm PVC glue in plumbing.
All automatic sanitising devices must be installed after
the heater and in such a way that the sanitiser cannot
enter the heater without first mixing with the water in
the pool or spa. Sanitisers that are connected prior to
the heater will void heater warranty.
A non-return valve is not required to be fitted
between the filter and the heater.
1. For best pump performance keep suction pipe
length as short as possible with minimum number
of bends and use 50mm high pressure PVC suction
and return pipe. All equipment such as lters,
heaters, chlorinators must have a minimum of 50mm
connections.
2. Secure the barrel unions supplied into the attaching
pipe work, using approved priming uid and solvent
cement as normal practice, coating both surfaces.
NOTE: Always wear protective gloves when handling
and using glue and priming uid. Ensure no excess
adhesive runs into the union proper aecting the
sealing or removal abilities. Allow 24 hours to dry
before starting pump. Do not use “green” glue on
barrel unions. This can cause damage to the ABS
material used to manufacture the unions.
3. Install isolation valves before the pump section and
after equipment, if the pump is below the water level
of the pool.
4. For pump installations 500mm above water level, it
generally requires a foot valve at the pool or check
valve in the suction line. Suction lines must be
installed below water level until just in front of pump
location and vertical riser used to reach pump inlet.
AstralPool pumps are rated to a maximum head of 25
meters however refer to your pumps data plate for
actual achievable pressure
5. All pumps will operate quieter and perform more
eciently if a straight length of 450mm pipe is
plumbed horizontally into the front of the pump.
6. Water temperature not to exceed 45 degrees
7. Pumps must be either:
• supplied by an isolating transformer, or
• supplied through a residual current device (RCD) with a
rated residual operating current not exceeding 30mA.
4.4 Electrical Connections
The XT Pump is supplied with a standard 10 amp 3-pin
plug for connection to a 240V 10 amp GPO. All pool or
spa equipment connected to mains power should be
protected by an RCD circuit breaker.
The provided controller is a complete plug-n-play
assembly requiring no additional wired connection.
4.4.1 Voltage Checks
The correct voltage, as specified on the pump data plate,
is necessary for proper performance and long motor
life. Incorrect voltage will decrease the pump’s ability to
perform and could cause overheating, reduce the motor
life, and result in higher electric bills.
It is the responsibility of the electrical installer to provide
data plate operating voltage to the pump by ensuring
proper circuit sizes and wire sizes for this specific
application.
Most applicable wiring/installation codes require pool
pump circuits to be protected with a Ground Fault
Circuit Interrupter (GFCI), also commonly referred to
as a Residual Current Device (RCD). Therefore, it is also
the responsibility of the electrical installer to ensure
that the pump circuit is in compliance with this and all
other applicable requirements of the installation and
wiring code(s)/standard(s) applicable and enforced in
the area of installation.
CAUTION
Failure to provide data plate voltage (+/- 10%) during
operation will cause the motor to overheat and void
the warranty.
4.4.2 Electrical Wiring
WARNING
Viron pumps include Printed Circuit Boards (PCBs)
and microchips. It is necessary to turn power off
completely for 10 seconds before turning pump back
on again. Some brands on chlorinators may bleed
a small amount of power into the Viron Pump even
when the pump off mode is selected. If this occurs,
the Viron Pump may not reset correctly and may
not start until power is disconnected completely. In
some cases, the manufacturer of these chlorinators
may be able to remove or change a capacitor which
will completely disconnect power to the pump when
turned off. If not, a suitable chlorinator may be
required to be purchased. Astral Pool chlorinators
completely disconnect power to the pump when the
pump off mode is selected.

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The Viron XT Pump models covered in this
installation and operation manual provide separate
compartments for high voltage and low voltage
wiring.
4.4.3 User Interface
• 

• 

4.4.4 Data Port Connection (RJ12)
If a compatible AstralPool VX Salt Chlorinator, Viron
Salt Chlorinator or Viron Connect Touch Screen, is
connected with the AstralPool communication cable,
the speed of the pump and operating hours can be
controlled by these devices.
The Viron P320XT and P520XT must have its in-
built timer deactivated if the pump operating times
and speeds are to be operated by the compatible
AstralPool Salt Chlorinator EQ, RolaChem Dosing
Controller or Viron Connect remote touch screen. See
Section 6.3.8
1. Remove 2 Philips head screens from rear of pump and
the data port cover is removed by hand.
2. Plug RJ12 6 wire at cable purchased from AstralPool
into rear of pump and reassemble.
3. To achieve a proper seal, press the at cable under
the guide tabs (detailed view A). Slide data port cover
back on by aligning the tabs with the slots and the at
cable with the recess (detailed view B).
Figure 10. Data Port Location on XT Pump

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Section 5. Operation
5.1 Normal Operation
The Viron XT Pumps has three (3) pre-set speed
settings: Low, Medium and High.
• Low speed is the recommended setting for everyday
pool ltration when a cleaner is not connected.
• Medium speed can be used for gentle spa jet action,
when a suction cleaner is connected to the skimmer or
pool ltration.
• High speed should be used when backwashing,
manually vacuuming the pool, or operating spa jets or
some water features such as waterfalls.
5.2 Starting Up the Pump
CAUTION
Never run the pump without water. Running the
pump “dry” for any length of time can cause severe
damage to both the pump and motor and will void
the warranty.
If this is a new pool installation, make sure all piping
is clear of construction debris and has been properly
pressure tested. The filter should be checked for
proper installation, verifying that all connections and
clamps are secure according to the manufacturer’s
recommendations.
WARNING
To avoid risk of property damage, severe personal
injury or death, verify that all power is turned off
before starting this procedure.
1. Depending on the location of the pump, do one of the
following:
• If the pump is located below the water level of the
pool, open the lter pressure release valve to prime
the pump with water.
• If the pump is located above the water level of the
pool, remove the lid and ll the basket with water
before starting the pump.
2. Prior to replacing the lid, check for debris around
the lid o-ring seat. Debris around the lid o-ring seat
will cause air to leak into the system and will make it
dicult to prime the pump.
3. Hand-tighten the lid to make an air tight seal. Do not
use any tools to tighten the lid: hand-tighten only.
Make sure all valves are open and the unions are tight.
Restore power to the pump.
4. Once all the air has left the lter, close the pressure
release valve.
5. Press the MENU button for initial programming to
enter overdrive speed. FAST and two (2) rotating
circles will show on the user interface display.
• Viron XT Pump primes 30% faster than
conventional maximum speed.
• Viron XT Pump automatically limits maximum
speed according to the system’s total dynamic
head and power consumption.
• Once the pump is primed (or fail to prime within
ve (5) minutes), the speed will return to the last
speed when in the MANUAL mode.
6. If the water ow is not available within 1/2-minute,
turn o the power and prime the pump again. After
three (3) attempts at priming, turn o the pump and
check for leaks.
NOTE If no leaks are evident, a check valve or foot valve is
required to hold water for priming.
7. If water ow is not adequate after cleaning the lint
basket, turn o the power and check for other issues
such as the check valve, air leaks, faulty seal, cracked
lint pot lid, etc.
8. The Viron XT Pump will automatically start on PRIME
speed for the rst ve (5) minutes to assist with
priming, which will quickly ll the hair and lint pot
with water.
After ve (5) minutes, the speed will return to the last
speed when in the MANUAL mode. Note: See Section
6 for further details on adjusting the Prime speed and
Prime time.
9. During normal operation, it is recommended that
the Viron XT Pump operate on LOW speed for twelve
(12) hours per day. This setting provides the lowest
operating cost with the lowest noise levels. Should the
pool have areas where the water does not turn over
with this setting, increase the speed until the desired
water movement is obtained.
For technical assistance, call AstralPool Technical
Support at 1300 186 875.
5.3 Pump Lid Removal
WARNING
ELECTRICAL SHOCK HAZARD
Turn off all switches and the main breaker in the
variable-speed pump electrical circuit before starting the
procedure. Failure to comply may cause a shock hazard
resulting in severe personal injury or death.
1. Make sure that the pump is turned OFF.
2. Make sure that the switch to the circuit breaker to the
motor is turned OFF.
3. Make sure all necessary isolation valves are closed to
prevent water from reaching the pump.
4. Following the markings on the locking ring, turn the
ring counter-clockwise until the ‘START’ markings align
with the ports. See Figures 11.
5. Carefully remove the lid with locking ring.

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Basket
Lid
O-ring
Locking
Lid
Pump Wetend
Lift
Locking Lid
Up to
Access
Basket
Figure 11. Remove Pump Lid
5.4 Conduct Pressure Test
WARNING
When pressure testing a system with water, air
is often trapped in the system during the filling
process. This air will compress when the system is
pressurized. Should the system fail, this trapped air
can propel debris at a high speed and cause injury.
Every effort to remove trapped air must be taken,
including opening the bleed valve on the filter and
loosening the pump basket lid while filling the pump.
WARNING
Trapped air in the system can cause the filter lid
to be blown off, which can result in death, serious
injury, or property damage. Be sure all air is properly
purged out of the system before operating. DO NOT
USE COMPRESSED AIR TO PRESSURE TEST OR
CHECK FOR LEAKS.
WARNING
ELECTRICAL SHOCK HAZARD
Do not pressure test above 35 PSI. Pressure
testing must be done by a trained pool professional.
Circulation equipment that is not tested properly
might fail, which could result in severe injury or
property damage.
WARNING
When pressure testing the system with water, it is
very important to make sure that the pump basket lid
is completely secure.
1. Fill the system with water to eliminate trapped air.
2. Pressurize the system with water to no more than
35 PSI.
3. Close the valve to seal the water in the system.
4. Observe the system for any leaks or pressure decay.
5. If there are lid leaks, repeat this procedure. For
AstralPool Technical Support, call 1 300 186 875.

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Section 6. Viron XT Pump Controls
6.1 Viron XT Pump Control Panel
The Viron P320 and P520 XT Pumps incorporate an
LCD backlit screen with the following features:
• In-built Time Clock
• Timer periods: 1, 2, 3, 4 or not used
• Variable speeds: Low, Medium or High for each timer
period
• Displays actual RPM speed of motor
• Programmable via compatible AstralPool remote
control or chlorinator to operate at dierent speeds for
dierent times of day
• Enables start-up priming speed to be adjustable and
time of start-up speed to be changed from 2 minutes to
120 minutes
Figure 12. Viron XT Pump Control Panel
6.2 Speed Selections
General Rules:
• The total volume of water in your pool should be
turned over at least once a day.
• If operating for longer periods of time, you may be able
to turn the output of your salt chlorinator to a lower
level. Check your chlorine level frequently to ensure
you do not over or under chlorinate your swimming
pool.
• Low Speed is factory pre-set and is the recommended
setting for your daily ltration ow rate – enough to
gentle turn the water over once per day and circulate
the water completely around your pool. However, it
is essential that your professional pool installer adjust
your low speed so that your chlorinator cell remains
full or near full of water during operation and that your
skimmer weir door is creating sucient surface tension
to skim leaves from your pool. Other factors for
adjusting low speed may include satisfactory operation
of a suction cleaner or increased ow rate to circulate
water to“dead” spots in the swimming pool.
• Medium Speed is generally set up as your special
purpose ow rate. For example, an In oor cleaning
system will require higher pressures and ow rates
to operate and medium speed can be set up to
operate the In oor cleaning system. Other special
purpose ow rates may include but are not limited
to: operating spa jets, operating water falls or water
features, operating a suction pool cleaner.
• High Speed is generally set up to backwash your sand
lter. As a rule of thumb, this speed should be set so
that the gauge on your lter is approximately 70kPa
to 100 kPa in pressure but this will depend on the size
of your lter, and the size and length of the backwash
pipe line.
• Overdrive Mode can be used to drive in oor cleaning
systems, obtain extra pressure when spa jets are
selected or for additional vacuum suction when
cleaning the pool.
In warmer weather, or when the pool is used a lot,
your pump should operate for 12 hours a day or more.
Check your chlorine levels and visually inspect your
water to ensure that (a) you have adequate chlorine
and (b) the water in your pool looks clear and inviting.
If you have any doubts, take a sample of water to your
local pool shop for a water analysis.
Some Tips:
• The XT P320 will provide around 15,000 to 18,000
liters per hour on high speed, depending on pipework,
valves, lter size and other equipment installed on
your pool. On low speed the factory preset ow rate
is approximately 7,500 liters per hour. Low speed will
use approximately 10% of the power consumption that
high speed will use. Therefore, operating the pump
8 hours per day will provide a 60,000 liter pool one
complete turn over.
• The XT P520 pump will provide around 36,000 liters
per hour on high speed, depending on pipe work and
the Factory preset low speed at 1125 RPM will provide
around 12,000 liters per minute. This is sucient to
turn a 96,000 liter pool over once per day.
• As a guide, low speed should achieve a visible
skimming of the surface of the pool through your
skimmer box. When connected to an AstralPool
compatible salt chlorinator, Viron Connect Touch
Screen Control System, we recommend that for one
hour a day the ltration period is operated on at least
medium speed to achieve full circulation and good
surface skimmer of the pool. The balance of the
ltration cycle can then be set on low speed.

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• However, should your pool water develop cloudiness
or your pool surface exhibit algae growth you may
need to increase the low speed of your pump to ensure
adequate circulation of water and chlorine to all parts
of your pool.
• It is important to check your chlorine levels, pH and
other parameters to ensure your water quality is
correct before adjusting the speed of your pump.
We recommend these checks are carried out by your
professional pool shop or service technician.
Examples of Speed Selection during operation and
use of your Viron P320 and P520 XT Pumps:
Function Speed
Vacuuming Pool or Spa High Speed or Overdrive
Operating Spa Jets High Speed or Overdrive
Operating Waterfall or Water
Features
Medium Speed or High Speed,
Depending on Effect Required
Cleaning Up Pool with Cloudy
Water
Up to 24 hours on High Speed
or Overdrive Mode
General Filtration Low Speed (8 hours in Winter, 8
to 12 hours in Summer)
6.3 Programming
6.3.1 Factory Default Setting
1. The inbuilt timers are activated and will control the
time the pump operates
2. Connectivity to AstralPool compliant Salt Chlorinators,
EQ Chemical dosing controllers or Viron Connect
remote Controls is turned “o”
3. Use the “auto” button to turn the pump on or o.
When in on position, the pump will remain o until the
next timer period unless pressed again to manually
on. If pump is turned to manually on, it will continue
to operate indenitely. If in the “O”position (visible
on the LCD), the pump will remain indenitely o. For
timer operation, ensure the“auto” button is pressed so
that the LCD screen displays“auto”.
6.3.2 Setting the Current Time
1. If connected to a compliant AstralPool Salt Chlorinator
or EQ dosing controller connect data cable between
rear of pump and the chlorinator in EQ dosing unit.
2. Connect and turn power on to the pump and
Chlorinator (or dosing unit)
3. Have pump set in“MANUAL OFF”
4. Press “MENU BUTTON” to toggle through the
selections until “CLK” appears and press “ENTER” to set
time. Use up and down arrows to set the hour, press
“enter” again to set minutes and then press “enter”
again to set AM or PM.
5. Press Auto/Power button to accept.
6. The LCD screen will quickly ash 3 times to indicate
the new setting has been accepted.
6.3.3 Setting Independent Pump Operation
1. Toggle Menu until “CONF” is displayed on the LCD
screen
2. Press and HOLD “enter” for 3 seconds.“TMRS” will
appear.
3. Press “enter”
4. Press UP or Down buttons to turn “TMRS ON”
5. Press “enter” to accept
6. Press “auto”to return to main menu.
6.3.4 Changing Speed Settings
1. Select the Speed Button to be adjusted, Low, Medium
or High. Respective LED will light up.
2. Alter the speed in increments of 25 RPM using the up
and down arrows until the desired speed is displayed
on the screen. Respective “Speed 1”, Speed 2”or
“Speed 3”, will ash while editing.
3. The new speed will automatically save after 2 seconds.
Flashing will stop to signal save.
6.3.5 Setting Filtration Timer Periods
1. Press Menu to go to PRIM setting.
2. Prime period is defaulted to 5 minutes and high speed.
We recommend if your pump is installed at or below
water level, you change the PRIM to 2 minutes. Press
“enter” and then Up or Down arrows to change the
prime speed. Press “enter” to accept. Priming period
will now be displayed.
3. Use the Up or Down arrow to change the Priming
period. Press “enter” to accept.
4. Press Menu to go to TMR “timer settings”and press
“enter” to change.
5. Timer 1 is factory set to start at 8 am. Use up or down
arrows to change. Press High, Medium, or Low to
select the speed of the pump during Timer 1. On the
LCD Screen, Low is represented by speed“1”, Medium
by speed “2”, and High by speed “3”.
6. Press Enter to move to the stop or end time of Timer
1. Use the up and down arrows to change the end of
Timer 1.
7. Timer 2 will now appear on the LCD Screen. Repeat
instructions 4. to 6. Above.
8. Timer 3 will now appear but is factory pre-set to OFF.
The OFF time menu selection shows prior to 12:00 a.m.
and must be selected to turn that Timer period o.
Use the up and down arrows to activate the time and
repeat process 4 and 5 above.
9. Timer 4 is also factory pre-set to “o” but can be
activated by using the up and down arrows.
10. Remember to select the speed you wish to operate
during each timer period by pressing the High,
Medium or Low buttons while still in the Timer Start
program.

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6.3.6 Using In-Built Timer with Non-compliant
Chlorinator
1. We do not recommend the use of the pump timers
when a non compliant chlorinator or chemical doser
is supplied water ow by the Viron P320 or P520 XT
pump.
2. In this case, the pump operating hours should be
controlled by the chlorinator time clock and the pump
plugged into the chlorinator. This is a safety measure
provided for by most chlorinator manufacturers.
3. However, it is important to deactivate the inbuilt
pump timers.
4. Have Pump in “MANUAL OFF”
5. Toggle Menu until “CONF” is displayed on the LCD
screen
6. Press and HOLD “enter” for 3 seconds
7. Toggle Menu until “TMR” appears.
8. Press UP or Down buttons to turn “TMR OFF”
9. Press “ENTER” to accept
10. Press “AUTO” to return to main menu.
11. When cycling through the Menu button TMR will no
longer appear
12. You will no longer be able to automatically have the
speed of the pump changed during dierent times of
the day.
13. However, if you wish for a period where the pump
operates at a high speed, for example to circulate the
water vigorously for a part of the daily ltration, you
can use the PRIMING setting to do so.
6.3.7 Using Priming Program to Circulate Water
at Higher Flow Rate
1. Have PUMP in MANUAL OFF
2. Press MENU BUTTON TWICE until PRIM appears on the
screen
3. Press ENTER To show current Speed, use UP
DOWN buttons to Adjust speed. Adjusts in 25 RPM
increments. Once Speed is selected Press ENTER.
(Similarly to HIGH Speed, PRIME speed can be set to
overdrive mode by using the Up button to increase
the speed above normal high speed) We recommend
high speeds for Priming
4. PRIMING TIME will now appear on the screen. Prime
period is defaulted to 5 minutes and high speed. Use
the up and down arrows to change the Priming period
From 2 minutes up to 120 minutes. Press ENTER to
accept, Screen will Flash
5. Press “Auto” to exit the programming.
6.3.8 Using Pump with AstralPool-Compliant
External Control
AstralPool manufactures Salt Chlorinators, EQ
chemical dosing units or the Viron Connect Touch
Screen Control system which can control both the
operating times of the all Viron XT pumps PLUS the
speed the pump operates at during each timer period.
For the P320 & P520 you must enable the
communication port and disable the Pump in built
timers.
1. Toggle Menu until CONF (congure) appears. Hold
enter for 3 seconds.
2. Toggle Menu until “TMR” appears.
3. Press UP or Down buttons to turn “TMR OFF”.
Remember, you are now using the external control
to set the pump operating hours, so the pump timer
must be turned o.
4. Press “enter” to accept
5. Toggle menu until SYS (system) appears. Press the up
or down button and turn to “ON”. The Viron P320 or
P520 XT will accept the start, end and pump speed
instructions from the AstralPool compliant control
chlorinator EQ & Rolachem dosing controller or Viron
Connect Touch Screen Control.
6. Press “auto”to return to main menu.
7. The time will still be visible on the LCD display
however, the timer function in the menu setting will
no longer appear. Toggle the menu button will now
only display PRIM (priming program), CLK (clock
setting) and CONF (Conguration menu).
8. Refer to your AstralPool compliant Chlorinator, “EQ”,
RolaChem Dosing Control or Viron Connect Touch
Screen Control manual for details of programming the
pump speed and operating hours.

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6.4 XT Pumps and Other Products
6.4.1 Use With Remote Controls
6.4.1.1 Viron XT Pump Standalone
• 4 built in timer periods in pump
• 3 programmable speed settings
• Low, medium or high speed can be selected in each
timer period
• Priming period can be selected from 2 to 120 minutes
• Prime RPM can be adjusted
2
3
Low HighMedium
ENTER
MENU
auto
240V Power
24V Communication Data
Figure 13. Viron XT Pump and Remote Control
6.4.1.2 Viron XT Pumps and Compatible VX Timer Model
Chlorinator or Viron Salt Chlorinator
• Timer periods set up in chlorinator
• Low, medium or high speed can be selected for each
timer period
• Data cable directly connects pump to chlorinator
• XTPump to be set up with timer periods deactivated
• Pump speed can be changed from pump (from
chlorinator early 2012)
2
3
Low HighMedium
ENTER
MENU
auto
240V Power
24V Communication Data
VX Salt Chlorinator
TIMER
CLOCK
DAY
ChlorineOutput Set Point
Decrease
SAFETY
BACKWASH
POOL
MODE
SPA
MODE
Increase
HOUR MIN
LowSalt
NoFlow
Auto
On
O
VXT
Figure 14. Viron XT Pump, Compatible VX Timer Model
Chlorinator and Remote Control
6.4.1.3 Viron XT Pumps, VX S (Non-timer) Model
Chlorinator and Viron Connect 10 Remote Control
System
• Timer periods set up in controller
• 3 programmable speed settings on pump
• Select low, medium or high speed during each timer
period
• Data cables connecting pump/chlorinator/controller
• XT Pump to be set up with timer periods deactivated
• Pump speed can be changed from pump or controller
2
3
Low HighMedium
ENTER
MENU
auto
240V Power
24V Communication Data
VX Salt Chlorinator
TIMER
CLOCK
DAY
ChlorineOutput Set Point
Decrease
SAFETY
BACKWASH
POOL
MODE
SPA
MODE
Increase
HOUR MIN
LowSalt
NoFlow
Auto
On
O
VXT
Timers
Home Favorites Pool& Spa Lighting
Heating Chemistry more...
Viron Connect 10
Figure 15. Viron XT Pump, VX S (Non-timer Model
Chlorinator and Viron Connect 10 Remote
Control System
6.4.2 Use with Suction Cleaners
When connecting a suction cleaner to the Viron XT
pump, it essential that full prime is achieved on the
pump prior to connecting the cleaner hose. During
operation at low speeds, the pump may only operate
with partial prime in the hair and lint pot chamber.
To operate a suction cleaner on your pump;
1. Choose the speed button (low, medium or high) on
which the pump will operate when the suction cleaner
is connected.
2. Allow pump to operate for a minimum of 2 minutes to
allow a full prime to be achieved.
3. Connect cleaner plate and hose to skimmer/wall
suction only after all air has been purged from the top
of the hair and lint pot of your Viron Pump.
4. Adjust speed (with increase or decrease buttons) at
which the cleaner will travel to all areas of the pool.
Factory set medium speed will usually operate all
suction cleaner types in most pools. If using the Low
Speed setting, it will usually be necessary to increase
the low speed to ensure the suction cleaner operates
reliably.
5. When cleaner is no longer required, disconnect and
remove hose/cleaner plate from system. Select the
lowest ltration speed that keeps your pool clean.

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6. If replacing or selecting a new cleaner, AstralPool
recommend our Robotic Range of Cleaners which
operate independently from the lter pump and
allows the pump to operate at a speed which oers
the maximum energy (and cost) savings.
6.4.3 Use with Gas Heaters
Gas heaters (and electric heat pumps) generally rely
on a water pressure switch to activate the heater
control circuit. When a variable speed pump operates
on low speed the water pressure produced in
generally insufficient to activate the pressure switch
and control circuit within the heater.
If using a compatible AstralPool Gas Heater you can
automatically increase the speed of your Viron XT
pump to ensure the water pressure switch is activated
and the heater obtains enough water flow to operate
correctly.
An RJ12 (6 wire flat cable) specifically wired and
obtained from AstralPool will connect your pump and
heater. Refer to Heater Instruction Manual for data
cable connection details.
2
3
Low HighMedium
ENTER
MENU
auto
24V Communication Data
(RJ12 Cable)
Figure 16. Viron XT Pump with RJ12 Cable Connection
Viron XT Pump is connected to Viron Heater or Other
Compatible AstralPool Heater via RJ12 cable
Viron Heater Status Viron XT Pump Response
When heater is OFF Runs at default set speed
When ON but not lit Runs at Medium speed
minimum. The user can use the
buttons to select medium or high
only (low speed button has no
effect). The start-up period is
cancelled.
When ame rst lights Runs at High speed. The user
cannot change the pump’s
speed.
When ame is lost Runs at default set speed or
Medium speed if heater power
is ON.
Viron XT Pump is connected to Viron Heater or Other
Compatible AstralPool Heater via Viron Connect
Viron Heater Status Viron XT Pump Response
When heater is OFF Runs at the user’s manual
speed or chosen default speed
when operating due to timers.
When ON but not lit Changes to a higher speed
which is congured by the
user in the installation set up
(the “heater ON” speed), or
the speed of the current timer.
The user cannot change to low
speed.
When ame rst lights Runs at high speed. The user
cannot change the pump’s
speed.
When ame is lost Runs at the user’s manual
speed or the chosen default
speed when operating due to
timers.