Powerline Twin
User Manual
for
PL Series pH/ORP Controller
with Saltwater Chlorinator
2016 Hayward Twin User Manual - print version inc Plus.docx
Contents
Manufacturers’ Warranty
Introducing the PL Twin Combo System
How it Works
Initial Pool Balance
Installation Guide
PL Twin Control Front Panel & Power Outage Operation
PL Twin Salt Front Panel
Navigating the PL Twin Control Menu System,
Running Times and Options
Timer Menu
ORP (Chlorine Output) Menu
pH Menu
Status Indicator, Warnings and Safety Shutdowns
Troubleshooting
Maintenance
2
4
5
6
7
10
12
13
14
15
16
17
20
20
IMPORTANT
If the power cord is damaged the unit must be returned to
Hayward for repair.
Always read the instructions and warnings on chemical
containers before using chemicals.
Serial Number........................................
Date of Installation................................
Installed by.............................................
Page 1
Standard Warranty – Professional Sales and Installation – Effective July 1st, 2016
To the original purchaser only, on-site warranty is provided at the discretion of Hayward Pool Products (Australia) Pty Ltd and is
available according to the following schedule and is subject to our standard warranty conditions.
Sold and installed by an approved installer
Parts
In-field Labour
Product Description
Powerline Control Box, Dosing System & Electrolytic Cell*
2
Spare Parts*3
3 Years
1 Year
1 Year
1 Year
Eligibility to claim
To be eligible to claim warranty support available to the original purchaser, prior to repairs being undertaken you
must:
a. Provide proof or purchase and installation by an Authorised/ Qualified Professional Dealer.
b. Where warranty claim is made, supply and installation must be completed by an Authorised/ Qualified
Professional Dealer or Builder, warranty certificate must be completed including installer’s full business details, copy
of original receipt and signature of approved partner’s representative. Where proof of professional installation is not
provided, warranty is limited to 12 months- parts only.
c. Where proof of purchase cannot be provided you will not be entitled to warranty support.
d. Any item that is hard wired to a power supply cannot be serviced on site. In this case contact Hayward Pool
Products (Australia), an Authorised Service Agent or place of purchase for instruction.
Conditions
1. On-site support will only be provided for installations located within 10km of the Authorised Service Agent in the
metropolitan areas of Melbourne, Sydney, Brisbane and Perth, or within 20km of an Authorised Service Agent in
regional areas. For Installations outside the specified radius the customer may have to pay a travel fee. Warranty
does not cover damages resulting from incorrect installations, improper storage, improper operation, water chemistry
or freezing.
2. To claim warranty a history of water balance test records must be provided to show compliant water balance has
been maintained for the product.
3. Parts including mechanical seals, multiport valves, elements, pressure gauges, grids, cartridges, bearings, shoes,
wings and drive tracks are considered spare parts and therefore qualify for 1 year manufacturer’s defect warranty.
Warranty commences from date of original purchase and is not extended in the event of a repair or replacement.
Squeeze tubes on peristaltic pumps need to be replaced every 6 months
Warranty- Standard Conditions
Hayward Pool Products (Australia) Pty Ltd (ACN 083 413 414) (”Hayward Pool Products (Australia)”) distributes
Hayward Pool Products in Australia and New Zealand and provides the following warranties:
STATUTORY RIGHTS
STATUTORY RIGHTS
1. The benefits to the consumer under this warranty are in addition to other rights and remedies of the consumer
under the laws in relation to the goods and services to which the warranty relates; and
2. Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to
a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage.
You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure
does not amount to a major failure.
LIMITED WARRANTY
Hayward Pool Products (Australia) warrants that its products are free from defects in materials and manufacture for
12 months from date of supply by Hayward Pool Products (Australia) plus 90 days to allow for installation and supply
(unless otherwise specified). Hayward Pool Products (Australia) will at its discretion, except in the circumstances
described below, either replace or repair any product proven to be defective during the warranty period for either
materials or manufacture or alternatively pay the cost of repair or replacement within 90 days of the receipt of the
defective product, barring unforeseen delays. This warranty is personal to the original purchaser and does not pass to
any subsequent purchaser(s).
To the extent permitted by law, Hayward Pool Products (Australia) will not be liable for products which fail or become
Page 2
defective during the warranty period as a result of freezing, accident, negligence, improper installation, water
chemistry, misuse or lack of care.
To the extent permitted by law, except as set out in this Warranty, Hayward Pool Products (Australia) excludes all
statutory or implied conditions and warranties and any other liability it may have to the Customer (including liability for
indirect or consequential loss) that may arise under statute or at law including without limitation for breach of contract,
in tort (including negligence) or under any other cause of action.
To the extent permitted by law, except as set out in this Warranty, Hayward Pool Products (Australia) limits its liability
under any condition or warranty which cannot be legally excluded in relation to the supply of Goods and Services to:
1. Replacing the Goods or supplying equivalent Goods or Services again;
2. Repairing the Goods;
3. Paying the cost of replacing the Goods or of supplying equivalent Goods or Services again; or
4. Paying the costs of repairing the Goods.
PRODUCTS REQUIRING QUALIFIED INSTALLATION
Some products due to their technical nature are only intended for sale by retail shops where local sales and technical
support can be provided or as a part of a new Pool Installation. Where installation has not been carried out in
accordance with this requirement, warranty labour and support will be the sole responsibility of the reseller supplying
the product. Warranty claims for such products will be limited to replacement of parts only, with faulty goods being
returned to place of purchase for processing.
The following products as well as those that may be designated by Hayward Pool Products (Australia) from time to
time, are not specifically intended for owner installation and are deemed to be technical products:• Heaters - All;
• Hayward Dosing and Chemistry Control;
• Hayward Pool and Spa Controls;
• Puresilk and Powerline Dosing and Chemistry Control;
Claims made for warranty, labour or infield support will not be accepted by Hayward Pool Products unless evidence is
provided that installation has been completed in accordance with standard warranty conditions. Please refer to
specific program document for details.
HEATING PRODUCTS
Please note that warranty claims for Heaters are handled directly by Hayward Pool Products (Australia) and are not
authorised for over the counter exchanges. These items are site specific and involve local conditions such as
placement, installation, water chemistry, fuel supply and electricity. Each unit needs to be evaluated on the site
utilising Hayward Pool Products (Australia)'s authorised service network. Hayward Pool Products (Australia) will not
be responsible for additional costs incurred where a heater has been installed at a location situated further than 20km
from an authorised service outlet. Advice must be sought in writing from Hayward Pool Products (Australia) to
determine appropriate service procedure on a case by case basis.
EXCLUSION FOR WEARING PARTS
This warranty does not extend to wearing parts, in particular the squeeze tubes fitted in peristaltic dosing pumps.
Squeeze tubes should be replaced every six months by a suitably qualified technician. Hayward is not liable for any
failure of its products or other damage caused by failure of a squeeze tube that has been used for more than six
months.
Hayward Pool Products (Australia) Pty Ltd
ABN 66 083 413 414
PO Box 4384, Dandenong South, VIC, 3164
Melbourne, Sydney, Brisbane, Perth
T (+61) 3 9792 2325 or 1300 POOLS1
F (+61) 3 9794 9945 or 1300 POOLS2
email: sales@hayward-pool.com.au
web: www.hayward-pool.com.au
Page 3
Introducing the PL Twin Combo System - what’s in the boxes?
The PL Twin Control Unit – the box contains the following components:
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Multi-electrode (probe)
PL Twin Control Power Supply
Tubing
Peristaltic Pump/s
User Manual
Injection manifold
Mounting hardware (wall plugs, screws and paper template)
PL Twin Salt Unit – the box contains the following components:



PL Twin Salt Cell
PL Twin Salt Power Supply
Mounting hardware (wall plugs, screws and paper template)
IMPORTANT SAFETY MEASURES:
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
Always add concentrated chemicals to water – not the other way around!
Don’t allow chemicals to mix – dangerous, highly corrosive fumes will be
produced.
Always wear protective clothing, footwear, gloves and eye protection when
handling pool chemicals to avoid injury.
If a spill occurs, wash the affected area with fresh water immediately and seek
medical attention.
Work in a well ventilated area and avoid inhalation of fumes.
Read and follow safety instructions on chemical drums.
Basic Requirements – the Pool Owner
Your PL Control maintains pool water biological safety by controlling the pH and
the ORP (sanitation level). It achieves this by dosing the necessary chemicals into
the pool in a controlled manner. The chemical drums must be checked on a
regular basis – empty drums will lead to poor balance and incorrect operation.
To achieve water safety effectively and efficiently there are other water balance
factors that must be maintained by the pool owner.
The most important water balance factors are described on page 6.
Failure to maintain these aspects of pool water balance can lead to poor water
quality and incorrect/unusual operation of the PL Control unit.
In the case of incorrect or unusual operation the pool water must be tested and
any balance problems corrected. After this is done it may also be necessary to
clean the Probe – this is part of the unit maintenance, see page 21.
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How it works:
The PL Twin Control Unit continuously analyses pool water chemistry while your pool
system is running. When it senses that the pool requires more chlorine, it turns on the PL
Twin Salt Unit, which produces chlorine using its electrolytic cell. The PL Twin System
also monitors the pH of the pool water and feeds accurate doses of acid into the pool via a
peristaltic pump.
The PL Twin Plus also has a chlorine dosing pump which activates when a very low ORP
is sensed, eg when a lot bathers use the pool at the same time. The system will dose liquid
chlorine until the ORP is closer to the set point and the Salt Unit can take over the final
dosing.
The PL Twin Salt Unit is a salt chlorinator, which works by putting a dc current through an
electrolytic cell in a flow of salt water. Salt is made up of sodium and chloride ions.
Electrolysis of salt produces chlorine gas, which dissolves almost instantly to form free
chlorine in the water. This free chlorine is a highly effective sanitiser for your pool.
The PL Twin Salt Unit constantly adds a dose of chlorine to the water when it is operating.
The amount of chlorine added depends upon the cell output and the running time, and is
monitored and controlled by the PL Twin Control Unit.
Oxidation Reduction Potential
The PL Twin Control Unit measures how much chlorine is in pool water by measuring the
ORP of the water. ORP stands for Oxidation Reduction Potential. Chemicals like chlorine
destroy pathogens (eg harmful bacteria) in water by oxidising them.
The level of oxidation available in the water can be measured chemically with an ORP
sensor contained in the PL Twin’s multielectrode (probe). This produces a voltage related
to the ORP of the water, which is a measure of the effectiveness of chlorine in the water.
Varying the ORP will alter the chlorine residual in the pool. Many factors affect the ORP of
a body of water. When using ORP for the control of a salt electrolyser the ORP values can
be different to those seen in a non-salt pool. Different pools are likely to exhibit different
chlorine residuals for the same ORP.
pH Control
When chlorine is added to water the pH always changes – this is because chlorine is not a
neutral chemical. The pH will slowly rise as chlorine is added to the water. A rise in pH
greatly reduces the effectiveness of the chlorine as a sanitiser, so it is important to ensure
that the pH remains in the correct range.
The pH of the water can be lowered by the addition of acid – and your PL Twin System
does this automatically. The PL Twin Control’s multielectrode (probe) measures the pH of
the water and doses the pool with small amounts of acid to keep the pH in the correct
range.
Page 5
Initial pool balance
Before you begin using the PL Control make sure your pool water is balanced as follows:
Chlorine
If it is a new installation, add enough chlorine (liquid or granular) to achieve a reading of
3ppm on an appropriate test kit.
Stabiliser
If the pool is outdoors, it is vital that stabiliser (also known as cyanurate and cyanuric acid)
be added and maintained at 40ppm to 60ppm. This compound reduces chlorine
destruction due to sunlight. However, too much stabiliser will reduce the effectiveness of
chlorine and can result in poor quality water so ensure stabiliser does not exceed 80ppm.
Good stabiliser level keeps good chlorine levels and reduces maintenance.
pH
For chlorine to be effective, the pH must be within a certain range. This is usually between
6.8 (fibreglass/liner pools) or 7.2 (concrete/plaster) and 7.8.
Adjust pH down with acid – powder, liquid sulphuric or liquid hydrochloric. Be very careful
with acid as it can be harmful and corrosive.
Total Alkalinity (TA)
Total alkalinity is also known as carbonate hardness or TA for short. The recommended
level is between 80 and 120ppm.
TA is related to pH in that it stops the pH from varying quickly with small additions of acidic
or alkaline chemicals. When the TA is low it is almost impossible to Control the pH.
To raise the TA, buffer (sodium bicarbonate) is added. This must be done slowly as buffer
will also cause the pH to rise. As an approximate rule every increase of 20ppm of TA will
also cause a 0.1 rise in pH. Once buffer is added it should be left to mix in the pool for a
few hours before reducing the pH.
Phosphates and Nitrates
Phosphate and ammonia nitrogen will make your garden green – and they will do the same
thing to your pool. Check for phosphates and add phosphate remover if necessary. Don’t
let fertiliser get into your pool! Ammonia nitrogen has a very high chlorine demand.
Phosphates are also in some cleaning products – check the label if using around your pool.
When Controlling a Salt Water Chlorinator (SWC)
Follow the directions for the initial balance for your SWC unit – the difference is likely to
only be the addition of salt or minerals. Note that the PL Control unit will turn the power to
the SWC unit on and off – the SWC unit must be capable of functioning in this manner and
should be set to manual operation only (not automatic).
Special Note: SWC units produce compounds other than chlorine. If complex chemicals
are added to the pool there is a greater likelihood that the readings for ORP will be affected
by these electrolysis products. Pool additives containing phosphonates, organic acids and
their salts, polymers and polymer acids should be avoided.
Page 6
Installation Guide
Choosing a good location
The PL Twin Combo System is manufactured from weather resistant materials and is
designed for operation in full sun and rain. However, your PL Twin System will benefit if it is
protected from the weather.
The PL Twin Power Supplies should not be mounted in areas where chemicals are stored
(eg acid and chlorine) as vapours from these chemicals are corrosive and may damage the
electronic controls within the units.
Insect intrusion (particularly ants) can cause problems with all equipment. Ensure that the
pool equipment area is kept free of insects as much as possible. Insect intrusion is not
covered under the warranty.
Installing the PL Twin Power Supply Units
Locate the two Power Supply Units close to the filtration pump so that it may be connected
easily. Connect the PL Twin Control Power Supply to the mains power outlet of the pool
area and make sure this outlet meets all applicable Australian Standards at the time of
installation.
Mount the PL Twin Power Supply Units at least 1.5m above the ground and at least 3m
from the pool water. A mounting template is printed on the last page of the manual.
The PUMP socket outlet in the base of the PL Twin Control Power Supply is dedicated to
the filtration pump only. Do not use a double adaptor to connect another pump as this will
overload the system and void warranty.
Your PL Twin Control Unit has two other power outlets on its base, which are used to run
the PL Twin Salt Unit and a pool light transformer. Each power outlet is labelled.
Installing the Injection Manifold
The injection manifold should be installed on the return (pressure) side of the pump and
filter, after accessories such as heater, but before the chlorinator cell. It can be plumbed in
as an elbow or an in-line fitting. Ensure that the water flow is in the correct direction (as
marked on the injection manifold.)
Installing the Probe (into the Injection Manifold)
The probe supplied for use with an Injection Manifold has a bayonet fitting. To install the
probe, simply insert it into the injection manifold and twist to lock the bayonet fitting. Do not
lose or kink the O-ring seal.
Page 7
Tubing
Use only the tubing supplied with your PL Twin System. Use of other types of tubing may
damage your PL Twin System and void your warranty. Ensure tubing is clean and free
from dirt or sand before fitting.
Installing the Peristaltic Pump for Acid Feeding
Mount the peristaltic pump unit adjacent to the PL Control Unit, as it is hard-wired to this
power supply.
Cut a length of tubing that will reach from the base of the peristaltic pump to the injection
manifold. Connect one end of the tubing to the outlet side of the peristaltic pump (the
direction of flow is indicated by an arrow on the front cover of the pump.) Connect the
other end of the tube with loop to the Y-piece near the injection point on the injection
manifold.
Cut another length of tubing that will reach from the base of the peristaltic pump to the
base of the chemical drum. Position the chemical drum in a safe and secure location,
preferably about 2 metres from the PL Control and any salt unit.
Connect the end of this tube to the inlet side of the peristaltic pump - the direction of flow is
indicated by an arrow on the front cover of the peristaltic pump.
Drill an 8mm hole in the lid of the chemical drum and pass the tubing through the hole in
the drum lid. Place a sinker on to the end of the tubing that will be in the chemical drum
and then attach the drum filter. Note that the drum filter incorporates a non-return valve to
prevent back-flow into the chemical drum.
Before placing the tubing into the drum, measure the tubing against the outside of each
drum and wrap several turns of PVC tape around the tubing above the drum lid so that the
drum filter will be 10-15mm above the bottom of the drum. Lower the drum filter and sinker
into the drum and screw on the lid.
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Page 9
The PL Twin Control Unit Front Panel
PL Twin Control Unit Display
The PL Twin Control Unit uses a four line LCD display to provide the user with information.
Line 1
Line 2
Line 3
Line 4
shows the current time and the mode of operation.
In the example above, line 1, tells you that the time is 3:27pm and the PL Twin
System is operating in “Normal Automatic mode”
Note that the PL Twin System displays the time using a 24 hour clock.
shows timer information.
In the example above, line 2 tells you that the “unit is turned ON and will turn
OFF automatically at 21:00 (9pm)”
displays ORP (Chlorine) information.
In the example above, line 3 tells you that the current ORP is 670mV with the
unit set to provide 650mV
displays pH information.
In the example above, line 4 tells you that the current pH is 7.5 with the unit set
to provide 7.6.
Operation Following a Power Failure
The PL Twin Control Unit comes with a timer function built into the operating software. The
timer is a 24-hour type with quartz-crystal control. This Timer is backed-up by a Real-Time
Clock (RTC) similar to those found in computers.
During a power failure the PL Twin Control Unit will keep time and maintain AutoMode
functions.
If a Filter Cycle is active when power is returned the pump will be turned ON within 1
minute. The PL Twin Control Unit will keep all its settings and will not need to be reprogrammed.
The PL Twin Control Unit is ideal for use in systems where repeated power cuts occur,
such as off-peak power circuits and Queensland’s Tarriff33 system.
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10
PL Twin Control Unit Operational Buttons
Your PL Twin Control Unit has 5 buttons that allow you to control the various functions
available via the PL Twin Menu system.
Each button is labelled with its primary
function either on the button itself, or
adjacent to it. Secondary functions are
labelled within a curved white outline next
to the relevant button.
The buttons are backlit to show which are
active at any given time, although the
ESC/OFF button is always available to
take you back to the home screen.
ON Button
Turn the System On Manually
Press the ON button once to switch the PL Twin Control Unit and the pool pump on
manually. The PL Twin Control Unit will default back to AUTO and turn itself off
automatically at the end of the next programmed FILTER CYCLE (and this time will be
displayed on the LCD).
Increasing Manual Run-time in Hourly Increments
Press the ON button repeatedly (or hold the button down) to increase the manual run time
in hourly increments. The run time is displayed on the LCD. When the desired run time
has been reached, press the ENT button to confirm your selection and the system will
commence operation.
ESC/OFF Button
Turn the System Off Manually
If the PL Twin Control Unit and pool pump are running, pressing this button will turn them
off manually. The PL Twin Control Unit will automatically turn on again at the start of the
next FILTER CYCLE (and this will be displayed on the LCD).
Return to Home Screen
If you have unintentionally accessed a PL Twin Control Unit Menu that you don’t actually
require, pressing the ESC/OFF button allows you to return to the home screen at any time.
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11
ENT Button
Use this button to enter the PL Twin Control Unit Menu system and to access the various
options in each Menu. Use the Y/UP and N/DOWN buttons to scroll through menu options
and when your desired menu option is displayed on the LCD, press ENT to access that
option.
Y/UP Button and N/DOWN Button
If you have accessed the PL Twin Control Unit Menu by pressing the ENT button, press
the Y/UP button or the N/DOWN to scroll through the various menu options. Some menu
options will prompt a yes or no answer. If you wish to answer “yes”, press the Y/UP button,
and if you wish to answer “no” press the N/DOWN button.
The Pool Light and Auxiliary functions are not usually available on the PL Twin System
because the power outlets at the base of the PL Twin Control Unit are used to operate the
PL Twin Salt Unit and other devices. However, if you would like more information in
relation to using your PL Twin System to control pool lighting and other accessories,
please contact Hayward on 1300 POOLS1.
PL Twin Salt Unit Front Panel
The PL Twin Salt Unit uses a simple LED Bar Meter and Alarm LEDs to provide the user
with information. There are 3 buttons to make adjustments to the system: ON/OFF,
+INCREASE & -DECREASE.
The LED bar meter usually shows the amount of chlorine being produced by the Cell as a
percentage of its maximum.
The Output Control turns the Cell ON/OFF over a short period of time. The Output setting
determines how long the ON time is – for example if the Output setting is 60% the Cell will
be ON for 60% of the period and OFF for 40% of the period. The Cell Output should be set
at 100% on a PL Twin Salt Unit because output is regulated by the PL Twin Control Unit.
To adjust the output, simply press the INCREASE or DECREASE buttons. The LED bar
will changes to a point meter (in red) while any adjustment is being made to indicate output
from 10% to 100%. The LED bar meter will return approximately 10 seconds after any
adjustment is made.
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12
Navigating the PL Twin Control Unit Menu System
There are three aspects to the general PL Twin Control Unit Menu system – the Timer
Menu, the ORP (Chlorine) Menu and the pH Menu.
Access the PL Twin Control Unit Menu system by pressing the ENT button and following
the prompts on the LCD. If you find you have ended up in a part of the Menu system
unintentionally, you can return to the Home Screen by pressing the ESC/OFF button at any
time.
Use the Y/UP and N/DOWN buttons to scroll through the various menu options until the
desired option is displayed on the LCD. Use the ENT button to confirm that you wish to
select that option.
Once accessed, use the Y/UP and N/DOWN buttons to adjust operational settings up or
down – and confirm adjustments by pressing ENT. To cancel any adjustments, simply
press ESC/OFF to return to the Home Screen.
Running Times
We recommend your system be operated for at least 4 hours per day and always run
the system when using the pool. As sunlight destroys chlorine, it is recommended that
the PL Twin System run mostly in the evening.
Chlorine is added for sanitation but the filter is needed to remove pollutant particles (dust,
sand etc) and keep the water looking good. The filter must operate for a reasonable
number of hours per day to remove pollutants. If there are adverse local conditions – such
as windborne dust and debris - the chlorine demand will be higher than normal and you will
likely need to operate the system for longer periods to adequately filter the water.
Optional Light Timer Menu and Auxiliary Outlet Menu
The Pool Light and Auxiliary functions are not usually available on the PL Twin System
because the power outlets at the base of the PL Twin Control Unit are used to operate the
PL Twin Salt Unit and other devices. However, if you would like more information in
relation to using your PL Twin System to control pool lighting and other accessories,
please contact Hayward on 1300 POOLS1.
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13
Timer Menu
Setting the time
Once you have installed your PL Twin Control Unit and turned it on, you will need to set the
correct time on the PL Twin's 24 hour clock.
First, access the Menu System by pressing the ENT button.
The LCD will display the word TIMER MENU. Select this by pressing the ENT button once
more.
Line 2 on the LCD will now read SET TIME HOURS. Press ENT to select this option and
then use the Y/UP and N/DOWN buttons- to adjust the hours on the LCD. Confirm the
correct hours value by pressing ENT again.
The LCD will now show SET TIME MINUTES. Adjust the minutes using the Y/UP and
N/DOWN buttons. When complete, press ENT to return to normal operation.
ADJUST CYCLES Sub-Menu
Your PL Twin Control Unit has two filter cycles pre-programmed as factory defaults as
follows:
Filter Cycle 1:
Filter Cycle 2:
ON at 6:00 (6am)
ON at 18:00 (6pm)
OFF at 08:00 (8am)
OFF at 20:00 (8pm)
You can change the start and finish times of each filter cycle to meet your sanitiser
requirements and to suit your lifestyle.
To adjust filter cycle start and finish times, press ENT to access the PL Twin Control Unit
Menu system. Press ENT again to select the TIMER menu and then scroll down using the
N/DOWN button until ADJUST CYCLES is displayed on the LCD.
Select this option by pressing ENT and the LCD will show the start (ON) time of the filter
cycle being adjusted. Use the Y/UP and N/DOWN buttons to adjust the start time. Press
ENT to confirm your selection and then the LCD will show the end (OFF) time for that filter
cycle. Adjust the OFF time in the same way as the ON time and press ENT to confirm.
After ON and OFF times for the first filter cycle have been adjusted, the ON time for the
second filter cycle is shown on the LCD. This can be adjusted in the same way, or if you
do not wish to make any changes, simply press ENT to confirm the time shown on the
LCD. Follow the same process to either adjust or confirm the OFF time for the second
filter cycle, and once this has been confirmed the LCD will display the home screen.
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14
ORP (Chlorine Menu)
The PL Twin Control Unit activates the PL Twin Salt Unit to generate chlorine until the
ORP set point is reached.
Accessing the ORP Menu
Access the PL Twin Control Menu System by pressing ENT. Use the Y/UP or N/DOWN
button to scroll through the main menu until ORP MENU is displayed on the LCD. Press
ENT to select.
Adjusting the Set Point
The ORP Set Point is the value in millivolts that the PL Twin Control will adjust your pool
water to. You can adjust the ORP Set Point via the ORP Menu.
Enter the ORP Menu as described above, and when the LCD reads “ADJUST SET POINT
Y/N?” Press Y/UP to select this option and then the LCD will display the current set point.
Adjust this using the Y/UP or N/DOWN buttons. Confirm the adjusted set point by pressing
ENT. The new set point will then be displayed on the right hand side of line 3 of the LCD.
Adjust ORP Control On or Off
To disable the ORP System (or re-enable it if it has been disabled) you need to access the
ORP menu and scroll through the various options until the LCD reads “ADJUST ORP
CONTROL TURN OFF? Y/N” (if the system is ON) or ADJUST ORP CONTROL TURN
ON? Y/N” (if the system is OFF). If you press Y/UP, the system will turn on (or off
depending on its current status). If you answer N/DOWN to either question, the LCD will
return to the home screen.
Other Options:
The PL Twin+ Control Unit has a liquid chlorine dosing pump available. This pump can be
turned on and off from the ADVANCED MENU. Once it has been turned on the ORP
MENU has the option to adjust the Dosing Delay. This delay allows the controller to run the
pool filtration system for a period of time prior to liquid dosing being activated. During this
period the Salt Unit will add chlorine prior to any “decision” to add liquid chlorine.
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15
pH Menu
Accessing the pH Menu
Access the PL Twin Control Menu System by pressing ENT. Use the Y/UP or N/DOWN
button to scroll through the main menu until pH MENU is displayed on the LCD. Press
ENT to select.
Manual Feed
Having accessed the pH menu, the LCD will ask “Manual Feed Y/N?” Press Y/UP to select
and the display will read “FEED 5 mins/75mL” You can increase the amount of the dose
by pressing the Y/UP button until the desired dose amount is displayed. (Note: the dose
volume displayed is an estimate only.). Press ENT and the peristaltic pump will commence
feeding acid.
Adjusting the pH Set Point
The pH Set Point is the pH that the PL Twin Control will adjust your pool water to. You can
adjust the pH Set Point via the pH Menu.
Enter the pH Menu as described previously, and press the N/DOWN button when asked
whether you wish to do a manual feed. The LCD will then read “ADJUST SET POINT
Y/N?” Press Y/UP to select this option and then the LCD will display the current set point.
Adjust this using the Y/UP or N/DOWN buttons. Confirm the adjusted set point by pressing
ENT. The new set point will then be displayed on the right hand side of line 3 of the LCD.
Calibration and Re-setting to Factory Defaults
If your PL Twin Control Unit consistently displays a pH reading different from that
obtained by manual testing with a quality test kit, it may be necessary to recalibrate the multi-electrode (probe). The instructions below assume the probe is
measuring a pH of 7.8.
Caution: do NOT recalibrate the probe until identical pH readings have been
obtained from at least three tests from around the pool. You will need to
calibrate the probe to the pH value obtained from these test kit results.
Enter the pH Menu as describe above and press the N/DOWN button when asked
whether you wish to a manual feed, and then again when asked if you wish to
adjust the set point.
The LCD will then read “CALIBRATE PROBE?” Press Y/UP to select this option
and the LCD will read “PROBE pH = 7.8 ADJUST TO +0.0”. Use the Y/UP button
to increase the adjusted value to the required level. Press ENT to confirm the
adjustment, and after a few seconds the PL Twin Control will revert to normal
operation and the home screen will display the new pH value.
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Adjust pH System On or Off
To disable the pH System (or re-enable it if it has been disabled) you need to access the
pH menu and work your way through the MANUAL FEED and ADJUST SET POINT
questions – pressing the N/DOWN button in response to each question.
The LCD will then read “ADJUST pH CONTROL TURN OFF? Y/N” (if the system is ON) or
ADJUST pH CONTROL TURN ON? Y/N” (if the system is OFF). If you press Y/UP, the
system will turn on (or off depending on its current status). If you answer N/DOWN to
either question, the LCD will return to the home screen.
Note: Turning off the supply of acid is not normally necessary and could lead to
unbalanced pool water that is unsafe to swim in. Hayward recommends that you seek
advice from a qualified professional prior to disabling the pH system – or call Hayward
Service on 1300 POOLS1.
PL Twin Salt Unit
Status Indicators, Warnings and Safety Features
Illustrated below are the possible status indicators, warnings and safety features that may
be observed on the PL Twin Salt Unit in various circumstances.
Normal Operation
Cell at full current and salinity
above minimum. Note that the
Cell current can be green or
orange depending on polarity.
Low Salinity
Salt alarm is red and Cell current
is less than maximum. This can
be caused by cold water. Check
salt and/or check Cell.
Flow Fault detected.
Cell has been turned off.
Turn off, then on again to clear
and restart.
Overload detected, Cell has been
turned off.
Turn off, then on again to clear
and restart.
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PL Twin Control Unit
Status Indicators, Warnings and Safety Features
Normal Operation – Green Status Indicators
When the PL Twin Control Unit is operating normally and ORP and pH readings are within
the correct range, a green status indicator will be illuminated and the LCD will indicate the
readings.
Note: it is the pool owner’s responsibility to monitor the pool and periodically
confirm the PL Twin Control’s readings with a good quality test kit. Remember that
the PL Twin Control is only able to balance pH and Chlorine levels – but you need to
ensure other factors such as stabiliser levels and total alkalinity are within the
correct range (see page 6 for details)
Low Chlorine
If the ORP falls significantly below the set point, this indicates that the chlorine levels in the
pool have fallen and dangerous pathogens in the water are not being destroyed rapidly.
The PL Twin Control will warn of low chlorine with a red status indicator and the words
LOW CHLORINE will be displayed on the LCD.
Possible causes include:

Low levels of stabiliser

High pH

Insufficient operating hours

Filter requires backwashing

The multi-electrode (probe) may require cleaning (see Maintenance)

Injector nozzle is blocked
If each of these factors are addressed, the PL Twin Control Unit will turn on the PL Twin
Salt Unit to produce chlorine until the set level is achieved – at which point the status
indicator will revert to green and the warning will no longer be shown on the LCD.
High Chlorine
If the ORP rises significantly above the set point, a red status indicator will be illuminated
and the words HIGH CHLORINE will be displayed on the LCD.
Possible causes include:

Manual overdosing (superchlorination)

The multi-electrode (probe) may require cleaning (see Maintenance)

Low pH (too much pool acid)

High Total Dissolved Solids (TDS)
There is no simple way to reduce high chlorine levels quickly. However, chlorine levels will
eventually reduce over days (or weeks), particularly if the pool is exposed to sunlight.
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Low pH – (Excess Acid)
If the pH of the water drops below the set point, a red status indicator will be illuminated
and the words “LOW pH” will be displayed on the LCD.
The PL Twin Control Unit will automatically prevent any further acid being added to the
pool until the pH is brought back into the correct range by the addition of sodium carbonate
or sodium bicarbonate.
Possible causes include:

Manual overdosing

Excessive rainfall

Faulty peristaltic pump

The multi-electrode (probe) may require cleaning (see Maintenance)

Low Total Alkalinity

Poor pool water circulation
Safety Shutdown
If the pH falls below 5.8 the PL Twin Control Unit will shut down pump operation to ensure
no more acid gets into the pool.
High pH – (Insufficient Acid)
If the pH rises significantly higher than the set point, a red status indicator will be
illuminated and the words HIGH pH will be displayed on the LCD.
Note that a high pH can drastically reduce the ORP of the pool water, and therefore reduce
the effectiveness of the sanitiser. It is important to restore the pH balance as soon as
possible by adding acid to the pool.
Possible causes include:

The acid drum is empty

The pool has been superchlorinated recently

The pool has a new plaster lining (very alkaline) demanding more acid than can
be supplied by the PL Twin System

Faulty peristaltic pump

Filter requires backwashing

Multi-electrode (probe) may require cleaning (see page 23 for details)

Injector nozzle is blocked

Venturi system (if fitted) is blocked
If each of these factors are addressed, the PL Twin Control Unit will dose the pool with acid
until the set level is achieved – at which point the status indicator will revert to green and
the warning will no longer be shown on the LCD
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Trouble-shooting
Before requesting service, you may wish to run through the check list below but feel free
to call Hayward Service on 1300 POOLS1 or log a service call via our website –
www.hayward-pool.com.au.
If there appears to be low or no Chlorine Residual:
1. Check stabiliser level is 40ppm – 60ppm. Add if necessary and wait for it to dissolve.
2. Have you added any chemical additives recently?
3. Check pool for phosphates and remove if necessary
4. Is the System turned on and operating the filter pump?
5. If the unit is not running at all, check the fuse in the bottom of the unit.
6. Are the operating hours sufficient?
7. Is the PL Twin Salt Output set to 100%?
8. Is there enough salt in the water? (4000ppm)
9. Is the temperature of the water low?
10. Is the Cell scaled heavily?
If either unit is not running at all check the fuse in the bottom of the units.
Maintenance
Like all equipment the PL Twin Control Unit will look better and last longer if it is
maintained and operated in accordance with these instructions.
The PL Twin System Power Supplies
The PL Twin Power Supply has been design for operation in full sun and weather.
However, it will benefit from being under cover.
There is little maintenance required, however – some Do’s and Don’ts –
Don’t:





Install it in a small sealed enclosure (so it does not overheat)
Install it in a very hot unventilated shed (so it does not overheat)
Allow insects to nest in the unit (because they will prevent it from functioning)
Install chemical drums under or close to the unit (to prevent corrosion)
Forget about the unit once installed – it should be checked regularly to ensure
that it is working for you



Install it as per the instructions
Check it regularly
Make sure the pool balance is checked regularly
Do:
Helpful hint: Cold water in winter can make the pool behave as though there
is not enough salt. Never add salt to the pool until you have had the salinity
checked. Too much salt can cause overloading and checking is easy.
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Cleaning the Multi-electrode (Probe)
If the PL Twin Control is consistently giving readings different from those obtained from a
test kit, it may be necessary to clean the multi-electrode.
To do this:

Remove the probe from the injection point by twisting the bayonet (or unscrewing
the retaining nut) and remove the o-ring.

Holding the cable, gently swirl the probe in a dilute solution of hydrochloric acid
(pool acid) for two minutes

Rinse the probe in clean water and then replace it in the injection point, making
sure that the “o-ring” is in place.

Twist bayonet to lock (or tighten nut with fingers)
Cell Cleaning
The PL Twin Cell is self-cleaning, however, some conditions such as very hard water can
cause the cell to become scaled over time.
The PL Twin Cell uses an electronic means (polarity reversal) to remove scale from its
cathodes. This system works very well in most pools unless there is extreme hardness
and/or mineral levels. Even in the extreme cases where scaling does occur the rate at
which it occurs is far slower than for normal Cells.
If scale has become thick enough to nearly bridge between the Cell electrodes, it is time to
clean the Cell. Cells can be cleaned in a solution of hydrochloric acid.
Please read the warnings and instructions on the acid container.
To make the acid solution, add 1 part hydrochloric acid to 4 parts water in a suitable
container. This solution can be used a number of times so a re-useable container with a lid
can be used, but make sure it is stored safely.
Alternatively a commercial Cell Cleaning solution can be used according to the
manufacturer’s instructions.
The PL Twin Control unit and the PL Twin Salt Unit should both be turned off so that any
AutoMode functions cannot turn it back on until after the Cell is clean and back in its
housing.
Remove the Cell from its housing and immerse in the acid solution. Note that it may foam
up and overflow the sides of the container – so take care!
The Cell should not take longer than a few minutes to clean. It may also be possible to
remove some or most of the scale with a jet of water.
Never use a stiff brush or hard implement to clean the cell because this will damage
the coating.
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