Henden HHDMSC24 Operating instructions

INSTALLATION &
OWNERS MANUAL
IMPORTANT
Please read carefully
Please pass these instructions on to the operator of this equipment
WARNING:
Failure to follow
these instructions
and comply with all
applicable codes
may cause serious
bodily injury and/or
property damage.
The installation of
this product should
be carried out by a
person knowledgeable
in swimming
pool plumbing
requirements following
the installation
instructions provided
in this manual.
HD Mineral & Salt Chlorinator
Models: HHDMSC24, HHDMSC36
SUITABLE
FOR USE WITH
S A LT O R
MINERAL
POOLS

2|HENDEN INSTALLATION & OWNERS MANUAL
Henden HD Mineral & Salt Chlorinator Installation Manual

HENDEN INSTALLATION & OWNERS MANUAL |3
Contents
Henden HD Mineral & Salt Chlorinator
INSTALLATION
1. INSTALLATION INSTRUCTIONS FOR HENDEN HD MINERAL & SALT CHLORINATOR 5
1.1 Installing The Power Supply 5
1.2 Connecting The Electrolytic Cell to the Power Supply 5
2. PRE-START UP PROCEDURE 6
OWNERS MANUAL
3. OPERATION OF YOUR HENDEN HD MINERAL & SALT CHLORINATOR SYSTEM 8
3.1 Control Panel Layout 8
4. HENDEN HD MINERAL & SALT CHLORINATOR FEATURES 9
4.1 Stand - By 9
4.2 Flow 9
4.3 Sanitiser Output Control 9
4.4 Low Salinity Indicator 9
5. OPERATION OF HENDEN HD MINERAL & SALT CHLORINATOR 9
5.1 Normal Operation 9
5.2 Winter Mode 10
6. AUTOMATIC TIME CLOCK OPERATION 10
7. MAINTENANCE OF POWER SUPPLY 12
8. MAINTENANCE OF ELECTROLYTIC CELL 12
9. DAY TO DAY OPERATION 12
9.1. Stabiliser 12
9.2. pH and Total Alkalinity 12
9.3. Salt Levels 13
9.4. Running Times 13
10. CHLORINE PRODUCTION 13
10.1 “Shock” Treatment 13
10.2 Chlorine Types and Comparisons/Max Pool Size 14
10.3 Safety Device 14
11. GENERAL INFORMATION 15
11.1 Common Terms 15
12. IMPORTANT NOTES 15
13. TROUBLE SHOOTING 16
14. HENDEN™REPAIR OR REPLACEMENT GUARANTEE 16
15. MOUNTING TEMPLATE 18

Henden HD Mineral & Salt Chlorinator Installation Manual
4|HENDEN INSTALLATION & OWNERS MANUAL
IMPORTANT NOTICE
FACTORS THAT WILL IMPROVE THE PERFORMANCE
AND LIFE OF YOUR HD MINERAL AND SALT WATER CHLORINATOR
PLEASE READ THIS BEFORE OPERATING YOUR CHLORINATOR
POOL BUILDERS: Please cover this information with your customer during the
new pool “Hand over Session”
Mineral & Salt Water Chlorinators are a valuable piece of pool sanitising equipment and must be cared for to get
the best performance and life span from it.
There are THREE main factors that will damage your chlorinator and reduce the life of the product. Please
monitor the following factors in accordance with your installation & operating instructions.
1. MAINTAIN OPTIMUM SALT LEVELS:
OPTIMUM SALT LEVELS: 4500-6000ppm
• Run chlorinator at the optimum salt levels stated within this document and on the product to ensure optimum
sanitiser output and cell life.
• Operating this device at low salt levels will damage the cell and reduce its life.
• The control panel displays red LED indicator warnings when the salt levels are low.
• If no action is taken to rectify the salt levels, damage to the cell may result which will not be covered under
warranty.
2. MONITOR & MAINTAIN YOUR CHLORINATOR CELL:
• To keep your salt water chlorinator in the best possible condition, regular monitoring of the electrolytic cell is
recommended. The ‘cell’ is the unit containing the plates.
• During the chlorination process a white powdery calcium scale may naturally build up on the titanium plates in
the cell. Monitor the cell to prevent excessive scale build up. Excessive scale build up will cause damage to your
cell, and dramatically reduce its efficiency and lifespan.
• Reverse Polarity models are low maintenance models that minimise scale build up.
• The control panel displays red LED indicator warnings when the cell requires cleaning.
• If calcium scale builds up please clean the cell, following the cleaning instructions
provided on page 11.
• NEVER: Use concentrated acid to clean your cell.
• NEVER: Leave cell in cleaning solution for extended periods of time
• NEVER: Use metal implements, scourers or brushes to clean your cell
3. BALANCED POOL WATER CHEMISTRY:
• Salt levels MUST be maintained at 4500-6000ppm for optimum performance and lifespan
• Calcium hardness levels MUST be kept to ideal ranges of 200-275ppm (for concrete and tiled pools) and 100-
225ppm (for other surfaces) to prevent excessive scale build up and damage to equipment.
• pH levels MUST be kept to ideal levels to prevent damage to equipment and pool surfaces and to obtain
optimum sanitiser effectiveness.
• Total alkalinity and stabiliser levels must also be kept in an ideal range.
Note: Please refer to the RECOMMENDED POOL WATER CHEMISTRY chart on page 14 for more information.
INSTALLATION
Congratulations! You are now the proud owner of a
Henden HD Mineral & Salt Chlorinator. Please read all
information in this manual carefully before installing or
operating your Henden HD Mineral & Salt Chlorinator.
1. Power Supply / Controller
2. Electrolytic Cell
3. 2 x 50 x 40PVC Reducing Bush
4. Mounting Kit and Spare Fuse
5. Installation & Operating Manuals
PACKING LIST

Henden HD Mineral & Salt Chlorinator Installation Manual
HENDEN INSTALLATION & OWNERS MANUAL |5
Note: The chlorinator is not intended
for use by young children or infirm
persons without supervision. Please
ensure that young children are
supervised to ensure that they do not
play with the chlorinator.
Power connections and wiring must be
carried out by an authorised electrician.
1. INSTALLATION INSTRUCTIONS
FOR HENDEN HD MINERAL & SALT
CHLORINATOR
1.1 INSTALLING THE POWER SUPPLY
Select a convenient location that is not in line with direct
sunlight and is well-ventilated and within one metre of the
filtration equipment. Mount the power supply vertically,
at a serviceable height of 1.5 metres above ground level.
Australian Standards requires that the power supply shall
not be located within 3 meters of the pool water. Plug the
power supply into a suitable weatherproof outlet and plug
the pool filtration pump into the chlorinator power outlet
in the base of the power supply. The unit must be kept
away from acid and other chemical storage areas. Acid
and chemical vapours will corrode the electronics inside
the unit. It must also be kept away from heat sources.
Good ventilation is necessary for correct operation.
Two self-tapping screws and wall plugs have been
provided for fast and simple installation. Simply cut out
the template on page 18 for location of drill entry points.
Use a 7mm masonry drill bit when fitting power supply
to a brick or concrete wall. When mounting on a wall or a
post in the pool equipment area, drill pilot holes and fit
screws provided. Once screws are in position simply hang
chlorinator via bracket on back of unit.
1.2 CONNECTING THE ELECTROLYTIC CELL TO
THE POWER SUPPLY
The power supply is fitted with a flexible lead terminated
with brass connectors. These must be correctly and
securely fitted to the connections on the cell. To prevent
incorrect connection the fittings have been colour coded.
Flow
Flow
IMPORTANT This diagram is intended
to conform with S.P.A.S.A. for the
safe operation of saline chlorinators.
Any deviation is at the installers risk
and may void the manufacturer’s
warranty.
NOTE The cell must be fitted to allow
for easy removal and cleaning, and
positioned after all accessories such
as heater or pool cleaner, but before
it divides if there is more than one
return to pool line.
Note The gas sensors are pushed
onto the gas sensor bolt and are not
screwed on, even though the gas
sensor is threaded.

Henden HD Mineral & Salt Chlorinator Installation Manual
6|HENDEN INSTALLATION & OWNERS MANUAL
Do not use a double adaptor to connect
more than one pump - it can overload
the system and could void your
warranty.
2. PRE-START UP PROCEDURE:
POOL SALT
SALT LEVEL GUIDE – 20kg Bag
To raise salt
concentration by Salt Required
ppm % 25,000L
Bags / kg 30,000L Bags / kg 35,000L Bags / kg 40,000L Bags / kg 45,000L Bags / kg 50,000L Bags / kg 55,000L Bags / kg 60,000L Bags / kg 65,000L Bags / kg 70,000L Bags / kg
1000 0.1 1.3 / 26 1.5 / 30 1.8 / 36 2.0 / 40 2.3 / 46 2.5 / 50 2.8 / 56 3.0 / 60 3.3 / 66 3.5 / 70
2000 0.2 2.4 / 48 2.8 / 56 3.3 / 66 3.7 / 74 4.2 / 84 4.6 / 92 5.1 / 102 5.5 / 110 6.0 / 120 6.4 / 128
3000 0.3 3.6 / 72 4.4 / 88 5.1 / 102 5.9 / 118 6.6 / 132 7.4 / 148 8.1 / 162 8.9 / 178 9.6 / 192 10.4 / 208
4000 0.4 5.0 / 100 6.0 / 120 7.0 / 140 8.0 / 160 9.0 / 180 10.0 / 200 11.0 / 220 12.0 / 240 13.0 / 260 14.0 / 280
5000 0.5 6.3 / 126 7.5 / 150 8.8 / 176 10.0 / 200 11.3 / 226 12.5 / 250 13.8 / 276 15.0 / 300 16.3 / 326 17.5 / 350
6000 0.6 7.3 / 146 8.8 / 176 10.3 / 206 11.8 / 236 13.3 / 266 14.8 / 296 16.3 / 326 17.8 / 356 19.3 / 386 20.8 / 416
Before operating your Henden Salt Chlorinator please
ensure the following items have been added to your pool:
• SALT - Load salt into the pool at the following rates:
• All Henden Salt Chlorinator Models – 45-60kg per
10,000 litres (4500-6000ppm)
• MINERAL SALTS - Your Henden salt system can
also be used with all available pool salts, including
mineral salts containing Magnesium and Potassium.
When used exclusively with mineral salt pools, the
chlorine production is 50% of the normal rated output.
However, if used as an additive to normal salt pools, the
rated output is similar.
Connect manual vacuum system and turn on filtration
pump, slowly vacuum until salt dispersal is complete.
Place vacuum head into deepest end of pool and allow
vacuum to continue for a further 2 to 3 hours. Salt should
now be completely mixed. For pop up automatic “In-Floor”
cleaning systems allow the filter pump to run for 2 to 3
hours. Never add salt directly into skimmer box.
• CHLORINE - For a new pool installation that has not
been chlorinated, add sufficient chlorine (liquid or
granular) to achieve a reading of 3 ppm (with a suitable
test kit), or run the chlorinator system continuously for
at least 24 hours or until a reading of 3 ppm is reached.
• STABILISER - It is essential that pool stabiliser be
added and maintained at the rate of 30 - 50 ppm at all
times. Do not exceed 100 ppm. (FOR OUTDOOR POOLS
ON LY )
(Refer Day to Day Operation page 12 for further
information).
Storage and safety
1. Store in a dry, covered place away from direct sunlight
for longer bag life
2. Always use the entire bag content of salt, once opened.
Do not keep open bags of pool salt, as it is sensitive to
moisture in the air.
3. Care should be taken to avoid contact with eyes and
inhaling salt dust. Wearing eye protection and a dust
mask is good practice.
4. If eyes become affected, flush with clean tap water.
5. If skin becomes irritated, immediately wash contaminated
skin with plenty of water and then wash with soap and
water.
Either Black sleeved
terminal on lead to either
terminal on cell.
Blue sleeved terminal on
lead to threaded bolt on
cell.
Leads
Gas sensor:
BLUE
BLACK
BLACK
THREADED
BOLT
Important: The cell must be installed so that the water
flows through the cell housing via the cell head end in
accordance with the arrow on the cell housing. This is
to ensure correct operation of the gas sensor. It is also
important to ensure that terminals from the connection
leads fit tightly to the cell terminals.

HENDEN INSTALLATION & OWNERS MANUAL |7
Henden HD Mineral & Salt Chlorinator Installation Manual
Mineral Salt
For Mineral Salt applications please ensure the following
quantity of Mineral Salt (P/N: HMS15) and Mineral
Activator (P/N: HMA15) has been added to your pool.
Converting existing salt pools
Pool Size (Litres)
Henden Therapeutic
Mineral Salt
(15kg bags)
Up to 5,000 1 Bag = 15kg
Up to 10,000 2 Bags = 30kg
Up to 15,000 3 Bags = 45kg
Up to 20,000 4 Bags = 60kg
Up to 25,000 5 Bags = 75kg
Up to 30,000 6 Bags = 90kg
Up to 35,000 7 Bags = 105kg
Up to 40,000 8 Bags = 120kg
Up to 45,000 9 Bags = 135kg
Up to 50,000 10 Bags = 150kg
Up to 55,000 11 Bags = 165kg
Up to 60,000 12 Bags = 180kg
Up to 65,000 13 Bags = 195kg
Up to 70,000 14 Bags = 210kg
Up to 75,000 15 Bags = 225kg
1. Continue to operate your filter pump for a period of 24
hours following the addition of Mineral Salt to ensure
proper blending has occurred.
2. Henden Mineral Salt can be used with all Henden Salt
Water Chlorinators with recommended TDS levels of
between 4,000 and 6,000ppm.
3. When replacing normal pool salt with Henden Mineral
Salt, ensure that TDS levels do not exceed 6,000ppm
after its addition to the pool.
4. Ensure pH levels are between 7.4 & 7.6 after the addition.
To increase TDS by Approximately 1,000ppm
Pool Size (Litres)
Henden
Therapeutic
Mineral Salt
(15kg bags)
Henden Mineral
Activator
(15kg bags)
Up to 10,000 0.5 Bag 0.5 Bag
Up to 20,000 1 Bag 1 Bag
Up to 30,000 1.5 Bags 1.5 Bags
Up to 40,000 2 Bags 2 Bags
Up to 50,000 2.5 Bags 2.5 Bags
Up to 60,000 3 Bags 3 Bags
Up to 70,000 3.5 Bags 3.5 Bags
New mineral salt pools
Pool Size (Litres)
Henden
Therapeutic
Mineral Salt
(15kg bags)
Henden Mineral
Activator
(15kg bags)
Up to 5,000 1 Bag = 15kg 1 Bag = 15kg
Up to 10,000 2 Bags = 30kg 2 Bags = 30kg
Up to 15,000 3 Bags = 45kg 3 Bags = 45kg
Up to 20,000 4 Bags = 60kg 4 Bags = 60kg
Up to 25,000 5 Bags = 75kg 5 Bags = 75kg
Up to 30,000 6 Bags = 90kg 6 Bags = 90kg
Up to 35,000 7 Bags = 105kg 7 Bags = 105kg
Up to 40,000 8 Bags = 120kg 8 Bags = 120kg
Up to 45,000 9 Bags = 135kg 9 Bags = 135kg
Up to 50,000 10 Bags = 150kg 10 Bags = 150kg
Up to 55,000 11 Bags = 165kg 11 Bags = 165kg
Up to 60,000 12 Bags = 180kg 12 Bags = 180kg
Up to 65,000 13 Bags = 195kg 13 Bags = 195kg
Up to 70,000 14 Bags = 210kg 14 Bags = 210kg
Up to 75,000 15 Bags = 225kg 15 Bags = 225kg
1. With the filter pump running, pour the contents of
Henden Mineral Salt and Henden Mineral Activator into
the pool evenly around the edge.
2. Continue to operate the filter pump for a period of
24 hours following the addition to ensure proper
blending has occurred.
3. It is recommended that TDS levels be maintained
between 4,000 and 6,000ppm.
4. When using the Henden Mineral Salt and Henden
Mineral Activator, ensure that TDS levels do not exceed
6,000ppm after its addition to the pool.
5. Ensure pH levels are between 7.4 & 7.6 after the
addition.
STORAGE AND SAFETY
Store in a dry, covered place away from direct sunlight for
longer bag life
Always use the entire bag content of Mineral Salt, once
opened. Do not keep open bags of Mineral Salt as it is
sensitive to moisture in the air.
Care should be taken to avoid contact with eyes and
inhaling salt dust. Wearing eye protection and a dust mask
is good practice.
If eyes become affected, flush with clean tap water.
If skin becomes irritated, immediately wash contaminated
skin with plenty of water and then wash with soap and water.
CHLORINE - For a new pool installation that has not been
chlorinated, add sufficient Chlorine (liquid or granular) to
achieve a reading of 3 ppm (with a suitable test kit), or run
the Sanitiser system continuously for at least 24 hours or
until a reading of 3 ppm is reached.
STABILISER - It is essential that pool stabiliser be added
and maintained at the rate of 30 - 50 ppm at all times. Do
not exceed 100 ppm. (FOR OUTDOOR POOLS ONLY)
(Refer Day to Day Operation page 16 for further information).
Note: When the need arises to top up your pool with Henden Mineral
Salt or Henden Mineral Activator, due to dilution through rainfall
or backwashing. Henden recommends you use equal quantities of
Mineral Salt to Activator (ratio 1:1) and that you maintain your TDS
level between 4,000 and 6,000ppm. This will ensure your mineral pool
water stays soft, silky and crystal clear.
After adding Henden Mineral Salts to your pool the water may
temporarily have discolouration and form clusters of foam on the
surface. This is completely normal and is part of the mineralisation
stage and transformation process. This may last for 24 hours, however
after this time, your pool will return to normal and become crystal
clear and clean. It is recommended that you run your filter pump for a
minimum 24 hours after the addition of Henden Mineral Salts.

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Henden HD Mineral & Salt Chlorinator Owners Manual
• Page 5 •
DISPLAY / INDICATOR LED 1 LED 2 REASON / ACTION
STAND – BY ON Green Green
1. Start-up delay functioning.
2. Sanitiser Output set below max.
Cell is turned off. (Refer Sanitiser Output page 8)
FLOW STAND – BY ON Green Green 1. Gas detected. Check pump/pipes for damage.
2. Gas sensor not connected to cell.
FLUCTUATING
AROUND 100
Green Green System operating normally.
Green Red
1. Salt level too low. Add salt at a rate of 25kg per 25,000L.
2. Cell is calcified. Clean cell.
3. Water temperature low. Switch to Winter Mode.
Red Red
1. Salt level below minimum. Add salt.
2. Cell is calcified. Clean cell.
3. Water temperature very cold. Switch to Winter Mode.
Continued operation may cause damage to system-Consult
dealer for problem rectification.
OWNERS MANUAL
3. OPERATION OF YOUR HENDEN CHLORINATOR SYSTEM
Cell output on the digital LED display is expressed as a
percentage. The display will fluctuate around 100 when
producing chlorine - unless in Winter Mode, in which
case the display will fluctuate around 85. (Refer Winter
Mode on page 10). The unit is fitted with an electronic
control and warning system. This regulates the output
of the unit to the preset maximum. The warning system
consists of two Operation LED’s that will glow green, or
red to indicate possible faults with the unit or damaging
operating conditions.
3.1 CONTROL PANEL LAYOUT
AM
6
SELECTOR SWITCH
TIME CLOCK
SANITISER
OUTPUT DIAL
WINTER MODE SWITCH
OPERATION LED’S
Up and down
buttons for
incremental
settings.
Sanitiser
Output
Indicator
LED flow
indicator
Fuse &
Fuse holder
PLEASE NOTE: When Winter Mode switch is on unit will
operate similar to above except display will fluctuate
around 85. (Refer Winter Mode page 10).
Once the salt level in the pool is correct the unit may be
switched on. Set Sanitiser Output to Max (100%). The stand
- by indicator will be on and no cell output will be seen for
approx 30 seconds, this allows the pool pump and filter
to prime and the cell housing to fill with water. After this
start - up delay, the display should show 100 (+/-2), unless
in Winter Mode where it will display 85 (+/-2). At this point
both Operation LED’s should be green; if not there may be a
problem. (Refer table).

HENDEN INSTALLATION & OWNERS MANUAL |9
Henden HD Mineral & Salt Chlorinator Owners Manual
4. HENDEN HD MINERAL & SALT
WATER CHLORINATORS FEATURES
4.1 STAND - BY
The Stand - By indicator will be on when the unit is
preparing to produce chlorine. This will be either during
the systems initial start up or when the cell has been
turned off during the filtration cycle.
4.2 FLOW
If there is a problem with water flow or chlorine gas is
detected in the cell housing the fIow indicator will be on.
When this occurs the pump or pipes should be inspected
for damage and the Flow Sensor connection checked.
4.3 SANITISER OUTPUT CONTROL
The Sanitiser Output Control varies the amount of time
the cell operates during the filtration cycle.
The Sanitiser Output Control will not vary the electrical
current supplied to the cell.
As an example, if one filtration cycle is set at 5 hours, and
the Sanitiser Output Control is set to 80%, then the total
amount of time the cell will operate during the 5-hour
cycle will be 4 hours. If the Sanitiser Output Control is set
to 60%, the cell will operate for 3 hours total over the
5-hour filtration cycle.
When the Sanitiser Output Control is set to MIN, the cell
will be OFF for the duration of the filtration cycle. When
the Sanitiser Output Control is set to MAX, the cell will
be ON for the duration of the filtration cycle.
The Sanitiser Output Control is graduated in steps of
10% from MIN (OFF) to MAX (ON).
During the filtration cycle, the cell will be turned ON and
OFF a number of times each hour, unless the Sanitiser
Output Control is set at MIN or MAX. Using the previous
example (of 60%), the cell will operate for about 36
minutes each hour. This 36-minute operating time will be
made up of a number of smaller operating periods. As
an example, the cell may turn ON 12 times (for a period
of 3 minutes each time) over the hour to make up the 36
minutes.
This enables the electronic circuitry to re - adjust to any
changes in the pool water condition. For example, dilution
from winter rains, the addition of salt etc.
If the cell is OFF and you wish to check its operation,
simply turn the Sanitiser Output Control to MAX and
the cell will turn ON. Once checked, adjust the Sanitiser
Output Control back to the desired position and after a
few minutes the cell will turn OFF again.
To turn the cell OFF, simply turn the Sanitiser Output
Control to MIN. This will be convenient for backwashing.
4.4 LOW SALINITY INDICATOR
Your chlorinator is fitted with a number of protective
systems including the Low Salinity Indicator (operation
LED’s). As the salt level in the pool decreases, the wear
on the cell increases. Although salt is not consumed in
the chlorination process, it is lost through splashing, back
- washing and on bathers as they leave the pool. The salt
level is also reduced by rain, which causes dilution. Salt is
not lost to evaporation.
As the salt level in the pool falls toward the minimum
Operation LED2 will turn RED. At this point the salt level
should be increased by adding 25kg of salt per 25,000
litres of pool water. The addition of salt should not affect
the chlorinator as it is protected against overloads. If no
action is taken and the salt level continues to fall damage
to the system may result.
5. OPERATION OF HENDEN HD
MINERAL & SALT CHLORINATOR
5.1 NORMAL OPERATION
The Henden HD Mineral & Salt Chlorinator has the
following additional features:
1. POLARITY INDICATOR ON OUTPUT Display - The ±
Symbol appears before the cell output display to indicate
which polarity the system is in, i.e. positive or negative.
This symbol will alternate and is factory pre set.
2. SANITISER OUTPUT - When adjusting the Sanitiser
Output (refer previous section) the ESC system’s
Cell Output Display flashes the control setting (i.e.
percentage of time that the cell operates during
the filtration cycle) for a few seconds then resumes
displaying Cell Output, or standby light (if in waiting).
3. CLEANING OF CELL – The ESC System uses a
patented electronic reverse polarity system to
clean your cell, providing the convenience of lower
maintenance.
4. PUMP CUT-OUT – The ESC System features a
protective interlock system which cuts off power to
the pool pump if there is no water flowing through the
cell housing. This is especially helpful if the pump
‘runs dry’ and hence may stop the pump motor from
burning out.
There are other factors that can cause the unit not to
work correctly:
1. Heavy rain - can cause very diluted pool water to pass
over the cell due to surface skimming.
2. Scaled cell - a scaled cell will not draw as much
electrical current as a clean cell when first started.
3. Cold water - cold pool water reduces the ability of a
cell to carry electrical current. (Refer Winter Mode on
next page).
4. Failing cell - as the cell ages there will come a time
when the electrical current draw will drop. This can
be compensated for with the addition of extra salt. A
cell is considered failed when it draws less than 80 %
of maximum current. To keep a failed cell in operation
Winter Mode can be used along with extra salt. There
will come a time when the cell will not respond to
either extra salt or Winter Mode. It will then need to be
replaced. Please note that the Low Salinity Indicator
is not like T.D.S. meters, which are temperature
compensated scientific instruments. The accuracy
will be within 500ppm salinity and they are water
temperature dependent, just as the cell is.

10 |HENDEN INSTALLATION & OWNERS MANUAL
Henden HD Mineral & Salt Chlorinator Owners Manual
5.2 WINTER MODE
When the cell draws electrical current from the power
supply, the amount of current drawn is dependent upon
a number of factors. Two of these factors are salinity and
water temperature.
The Low Salinity Indicators on your chlorinator are
designed to operate at swimming season water
temperatures. When the pool begins to cool in the off-
season the temperature drop causes the cell to behave
differently - it will draw less electrical current. This
can cause the Low Salinity Indicator to assume that
the salinity has fallen even if the salinity has remained
relatively constant.
When the temperature of the pool water drops, the Winter
Mode Switch should be placed in the ON position.
The Winter Mode Indicator will then be ON. This has two
effects:
1. It alters the setting of the Low Salinity Indicator.
2. It reduces the cell output by approximately 15%
The unit will now respond to a cold pool environment.
Winter Mode should not be used in the swimming season
as it reduces the cell output, leading to less chlorine, and
it alters the setting of the Low Salinity Indicator, which
could lead to premature cell failure.
6. AUTOMATIC TIME CLOCK
OPERATION
Your Henden HD Mineral & Salt Chlorinator is fitted with a
digital automatic timer.
The digital timer includes a backlit Liquid Crystal Display
(LCD) which displays time of day in 12-Hour format
with AM / PM indication and a selector switch position
indicator. The digital timer has up and down buttons for
incremental settings.
Timer Setting and Functions:
To set your clock and various functions please refer to the
table of instructions following.
NOTE:
When you first turn on the power to the chlorinator, it will
take approximately 5 seconds for the LCD to appear on
the screen.
AM
6

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Henden HD Mineral & Salt Chlorinator Owners Manual
Function
Description
Selector
Switch
Position
Functions and Instructions
Set Clock 1
Set the current time on the digital clock.
Select the Set Clock position on the selector switch to enable the time of day
to be input. A number ‘1’ will appear at the left of the screen.
(a) The display will flash on and off as long as the selector switch remains at
this position. Use the up ▲ and down ▼buttons to reach
the desired times. Hold the buttons down for fast increments.
Set Timer 1 – ON 2
Set the start time for the first run time sequence.
Select the Set Timer 1 – ON position on the selector switch. A number ‘2’ will
appear at the left of the screen.
This time is factory pre-set to 6am. Proceed as per (a) in the ‘Set Clock’
instruction to change time.
To disable this timer, move up or down to 11.59PM. Press the UP button one
more time to turn OFF. NOTE: This step will also disable the time for ‘Set Timer
1 – OFF’.
Set Timer 1 – OFF 3
Set the completion time of the first run time sequence.
Select the Set Timer 1 – OFF position on the selector switch. A number ‘3’ will
appear at the left of the screen.
This time is factory pre-set to 8am. Proceed as per (a) in the ‘Set Clock’
instruction to change time.
Set Timer 2 – ON 4
Set the start time for the second run time sequence.
Select the Set Timer 2 – ON position on the selector switch. A number ‘4’ will
appear at the left of the screen.
This time is factory pre-set to 5pm. Proceed as per (a) in the ‘Set Clock’
instruction to change time.
To disable this timer please refer to selector switch position 2 above.
Set Timer 2 – OFF 5
Set the completion time for the second run time sequence.
Select the Set Timer 2 – OFF position on the selector switch. A number ‘5’ will
appear at the left of the screen.
This time is factory pre-set to 11pm. Proceed as per (a) in the ‘Set Clock’
instruction to change time.
To disable this timer please refer to selector switch position 2 above.
Automatic ON 6
Filtration system switches on and off automatically according to your set times.
Select the Automatic ON position on the selector switch. A number ‘6’ will
appear at the left of the screen.
Manual ON 7
Overrides the automatic time clock settings and switches filtration system ON.
Select the Manual ON position on the selector switch. A number ‘7’ will appear
at the left of the screen.
NOTE: Chlorination will be constant until turned OFF or back to Automatic ON.
Over chlorination may occur if left for long durations.
OFF 8
Overrides the automatic time clock settings and switches filtration system OFF.
Select the OFF position on the selector switch. A number ‘8’ will appear at the
left of the screen.
NOTE: Chlorination / sanitisation will cease. Not recommended for long
durations.

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WARNING Follow safety instructions
provided with the Hydrochloric Acid
or cleaning solution. When handling
Hydrochloric Acid, the use of eye
protection, mask and gloves are highly
recommended. Extreme caution
should be taken whenever handling
Hydrochloric Acid or cell cleaning
solution.
7. MAINTENANCE OF POWER SUPPLY
Little or no maintenance is normally required with the
exception of replacing blown fuses. These fuses can
be sourced from your local Reece Irrigation & Pools
branch. However, it is essential that the wall or post to
which the unit is installed be sprayed (not the unit itself)
periodically with a good surface type insect repellent,
since penetration by insects may cause damage, which is
not covered by your warranty.
The back of the unit has been designed as a heat sink. It is
normal for this area to become very hot.
8. MAINTENANCE OF ELECTROLYTIC
CELL
The cell is composed of precious materials, and although
proper maintenance can prolong its life to the maximum,
eventually the process of electrolysis will wear away its
delicate coating, at which time it gradually ceases to
produce chlorine.
Mineral salts and calcium (scale) are deposited on the
outer and the inner plate as electrolysis takes place. This
build up – will interfere with the flow of electrical current
in the cell and thus lowers sanitiser production. It is
essential to inspect the cell regularly and clean when
necessary. The rate at which deposits will form on the
plate differs with each pool and can be influenced by the
following:
• Calcium hardness of the water
• Water temperature
• pH control
• Water which has been chlorinated with calcium
hypochlorite for an extended period
• Calcium in the plaster surfaces of a concrete pool
Because these conditions vary so much, check the cell at
least weekly to begin with to see when either scale or a blue/
green soapy substance appears on the plate. You will then
be able to determine the cleaning cycle necessary for your
pool (obviously more in summer). The intervals between
cleaning could get longer to the point where cleaning is only
necessary a few times each year. One exception is the use
of bore water or ground water, in which case cleaning may
always need to be as frequent as once a week.
Life of Henden electrolytic cells vary substantially from
one installation to another due to variations in operating
time, water quality and composition, system and cell
maintenance. Please ensure that when cell replacement
is necessary you use the correct genuine Henden
replacement cell to match your system.
To clean the cell: Turn off the chlorinator unit. Remove all
leads connected to the head assembly. Unscrew the cell by
turning the head assembly clockwise – as per instructions,
and withdraw from the cell housing.
METHOD 1
Add 1 part HYDROCHLORIC ACID to 10 parts WATER in a
suitable container and immerse the cell in this solution.
It should not take longer than a few minutes to clean, if
it does the cell should be cleaned more frequently. If the
build – up is not excessive it may be possible to clean the
cell plates with a jet of running water. Return the cell to its
housing and connect leads to the head assembly.
METHOD 2
As an alternative, an approved commercial cell cleaning
solution can be used a number of times effectively.
9. DAY TO DAY OPERATION
Four prime rules must be observed if your unit is to give
the best possible service:
9.1. STABILISER
The importance of pool stabiliser cannot be over –
emphasised. It is essential in helping retain chlorine
in your pool. Chlorine is rapidly dissipated by sunlight
and the use of stabiliser will reduce this dissipation
substantially. Without stabiliser, it may be necessary to
run the unit for up to three times as long!
Stabiliser should be added at the rate of 500 grams
for every 10,000 litres of water. Stabiliser should be
maintained at a level of 30 – 50 ppm. Before adding more
stabiliser, have your pool water analysed at your local
Reece Irrigation & Pools branch to ensure that you do not
add too much.
9.2. pH AND TOTAL ALKALINITY
A correct pH level must be maintained to prevent
problems such as black spot, staining, cloudy water, etc.
An incorrect pH level can damage the pool. Correct pH
levels are as follows; fibreglass – 7.2 to 7.4 concrete & tiled
– 7.4 to 7.6 If you allow the pH level to rise to 8.0 or above,
the chlorine required could be as much as three times the
normal amount.
NOTE In areas with hard water,
reverse polarity systems may require
occasional manual cleaning.
NOTE If using mineral salts in areas
with hard water, reverse polarity
systems may require occasional manual
cleaning. Mineral salts can form scale
on the cell that isn’t removed through
the polarity reversal process, therefore
more frequent manual cleaning may
be required. In some cases this scale
is soft enough to remove with a strong
jet of water if acid cleaning proves
ineffective.

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Total alkalinity should not be confused with pH, although
the two are closely related. Total alkalinity determines
the speed and ease of pH change. It is measured in ppm
– the ideal range is 80 – 150 ppm, or refer to your pool
professional.
You should use a test kit which includes a test for total
alkalinity. Low total alkalinity can cause unstable pH
levels – i.e. An inability to keep the pH constant may cause
staining, etching and corrosion of metals. High total
alkalinity will cause constantly high pH levels.
9.3. SALT LEVELS
Salt is the essential element by which your unit operates.
Not enough salt means not enough chlorine - this
simple rule governs the total operation of your Henden
HD Mineral & Salt Chlorinator, and insufficient salt will
damage your cell.
RECOMMENDED SALT LEVEL RANGE:
4500 - 6000ppm
Salt is NOT used up in the process of producing chlorine
or by evaporation. Salt is only lost through back - washing,
splash - out, overflow or by leakage from the pool or
plumbing. Winter rains can dilute the salt solution in your
pool; therefore salt levels should be checked during this
season. In colder water, the Henden HD Mineral & Salt
Chlorinator should be set to Winter Mode. (Refer Winter
Mode page 10).
Low salt levels will destroy the coating on the anode
plates and will void all warranty.
The Henden HD Mineral & Salt Chlorinator has built in
warning indicators to minimise damage resulting from
insufficient salt levels, however, the ultimate responsibility
is on the owner to ensure adequate salt levels are
maintained all year round.
9.4. RUNNING TIMES
These instructions cover Henden HD Mineral & Salt
Chlorinators for residential use only.
If you run your chlorinator for 24 hours a day, or for long
periods, the cell life will be greatly reduced. It is important
that the correct model Henden Salt Chlorinator has been
installed on your pool. Many models are available to cope
with small courtyard pools up to commercial applications.
(Consult Henden for more information).
10. CHLORINE PRODUCTION
The Henden HD Mineral & Salt Chlorinator must be run
daily to generate sufficient chlorine to sanitise the pool.
During Summer this is approximately eight hours per
day, preferably in two periods - between 6.00am and
8.00am and between 5.00pm and 11.00pm. Night time is
preferable because chlorine dissipates rapidly in direct
sunlight. If these running times are observed, and the
cell is functioning correctly, your pool will have sufficient
chlorine when tested in the morning.
If the level is too low either longer running times are
required or the Sanitiser Output Control needs to be
adjusted to maximum. Harsh local conditions such as traffic
pollution or windborne dust require different running times,
in which case, seek advice from your local Reece Irrigation
& Pools branch. During winter approximately 4 to 6 hours
a day should provide enough chlorine. Without sufficient
filtration/chlorination, your pool will never function
correctly. ALWAYS RUN THE FILTER WHEN SWIMMING
IN THE POOL. In extremely hot weather or during periods
of heavy bathing loads, the running time may need to be
extended to 10 - 14 hours per day.
In some cases you may find your chlorine level to be
too high. To determine if this is the case, run your filter/
chlorinator for the suggested times/chlorine production
level and test your pool water on the morning after
operation. If your chlorine test shows a high level of
chlorine, either the running times can be reduced slightly,
or the Sanitiser Output Control can be turned anti -
clockwise. Test your chlorine level again the following
morning at around the same time. If your chlorine level is
still high, repeat the above process until the correct level
is attained.
10.1 “SHOCK” TREATMENT
Periodically, especially during extremely hot conditions,
it may be necessary to boost the amount of chlorine
in your pool in order to maintain absolute sanitation of
the water. This can be achieved by adding either liquid
or granulated chlorine. If granulated chlorine is added,
the cell must be checked regularly, since the additives
from this product will clog the electrodes. Alternatively,
extend the running time of your Henden HD Mineral & Salt
Chlorinator.
WARNING Some people recommend
that you put salt directly in the skimmer
box. This is a very poor practice as it
allows very high concentrations of salt
to be passed through your filtration and
other pool equipment.
WARNING Do not add Hydrogen
Peroxide to pool water or through
swimming pool hydraulic or sanitiser
system. Use of Hydrogen Peroxide will
void warranty on Henden products.
NOTE The appropriate chlorinator
size for your pool is dependent on the
local climate and the bather load of
the pool. Please note that chlorinator
cell life can be increased with shorter
running times during winter and lower
output settings. Henden recommends
that a chlorinator is run for between
6 - 8 hours a day during summer, and
4 hours during winter.

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10.2 CHLORINE TYPES AND COMPARISONS /
MAX POOL SIZE
Many chlorinator manufacturers calibrate their units
to compare with 65% granulated chlorine, making it
necessary to adjust their readings to a lower level in order
to determine true chlorine production. The display on your
Henden Salt Chlorinator expresses production as pure
100% chlorine so you will know the exact output of your
unit. Below is a comparison table of the available types of
chlorine used to sanitise pools.
Henden Salt
Chlorinator Production
maximum
grams/hour
(100%)
Production*
grams/
hour (65%
equivalent)
Chlorine
produced
over 8 hours
grams
(100%)
Equivalent in
dry granulated
chlorine
grams
(65%)
MAX POOL SIZE (litres)
Model COOL
CLIMATES
TEMPERATE
CLIMATES
HOT &
TROPICAL
CLIMATES
HHDMSC24 24 37 192 296 120,000 75,000 55,000
HHDMSC36 36 55 288 440 180,000 112,000 80,000
Dimensions
Type
Controller Cell Housing
Height
(mm)
Width
(mm)
Depth
(mm)
Mounting
holes
Height
(mm)
Width
(mm) Diameter Inlet/
Outlet
Plumbing
Holes
HHDMSC24
390 235 130
66
(centre to
centre)
141 376 123 50
194
(centre to
centre)
HHDMSC36
Electrical
Data
All Models
Voltage (V) 220-240
Phase 1
Supply Frequency (Hz) 50
Enclosure Class (IP) 34
Approval No. TUV16001EA
10.3 SAFETY DEVICE
Hydrogen gas is a by-product of the chlorine producing
process. A gas sensor has been incorporated into the
unit and cell, which will switch off chlorination if gas is
detected in the cell housing or there is no water flow.
Henden HD Mineral & Salt Chlorinator units are also
fitted with a thermal cut-out to prevent overheating. If
the temperature rises too high, power is automatically
disconnected. The unit will resume operation when it cools
down.
Note: When used exclusively with magnesium and
potassium mineral salts, the chlorine production is
50% of the normal rated output. However, if used
as an additive to normal salt pools, the rated output
is similar.

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Henden HD Mineral & Salt Chlorinator Owners Manual
RECOMMENDED POOL WATER CHEMISTRY
POOL WATER
BALANCING
Free Chlorine
(ppm) pH Total Alkalinity TA (ppm)
Calcium Hardness
(ppm)
Stabiliser –
Cyanuric Acid
(ppm)
Optimum
Salt Level
(ppm)
Ideal Reading / Range 1 – 3
Concrete &
Tiled Pools:
7.4-7.6
Other Surfaces:
7.2-7.4
Concrete & Tiled
Pools – 80-120.
Other Surfaces –
125-150
Concrete & Tiled
Pools – 200-275.
Other Surfaces –
100-225
25 – 50 4500 – 6000
To Increase
Increase output of
chlorinator. Add
chlorine. Increase
ltration time.
Add buffer
or soda ash
(Sodium
Carbonate)
Add Sodium
Bicarbonate
Add Calcium
Chloride
Add Cyanuric
Acid Add Salt
To Decrease Add Muriatic
Acid
Add Muriatic Acid
or Dry Acid
Partially drain &
rell pool with lower
hardness water to
dillute
Partially drain
& rell pool to
dillute
Partially drain
& rell pool
to dillute
Frequency of Testing Weekly Weekly Weekly Weekly Regularly Regularly
12. IMPORTANT NOTES
1. The Henden HD Mineral & Salt Chlorinator guarantee
does not apply to commercial or semi-commercial
installations, i.e. where the system runs more than an
average of 8 hours per day over the year. Guarantee
on commercial and semi-commercial installations is 12
months only on both power supply and cells.
2. ALWAYS INSIST ON GENUINE Henden HD Mineral & Salt
Chlorinator REPLACEMENT PARTS. If it is necessary to
replace the Electrolytic Cell, beware of “look alikes”. Only
the Genuine Henden HD Mineral & Salt Chlorinator Cell is
designed and warranted to operate with the Henden HD
Mineral & Salt Chlorinator Power Supply.
SERIOUS DAMAGE MAY RESULT TO THE ELECTRONICS
INSIDE THE UNIT IF COPY ELECTRODES ARE USED AND
WILL VOID WARRANTY.
Note: The Henden guarantee does not apply to
commercial or semi-commercial installations,
i.e. where the system runs more than an average
of 8 hours per day over the year. Guarantee on
commercial and semi-commercial installations is
12 months only on both power supply and cells.
11. GENERAL INFORMATION
11.1 COMMON TERMS
Algae - Microscopic forms of plant life which enter the
pool by rain, wind and dust. There are numerous varieties
- some are free floating whilst others grow on walls and
in cracks and come in different colours. Some are more
resistant to chemical treatment than others.
Bacteria - The germs that contaminate your pool.
Introduced by swimmers, dust, rain storms and other
elements.
Balanced Water - The correct ratio of mineral content
and pH level that prevents pool water from being
corrosive or scale forming.
Chloramines - Compounds formed when chlorine
combines with nitrogen from urine, perspiration, etc.
Chloramines cause eye and skin irritation, as well as
unpleasant odours.
Chlorine Demand - The chlorine required to destroy
germs, algae and other contaminants in the pool.
Chlorine Residual - The amount of chlorine remaining
after chlorine demand has been satisfied. This is the
reading obtained with your test kit.
Cyanuric Acid - Also known as stabiliser or conditioner.
It reduces dissipation of chlorine by direct sunlight.
Liquid Acid - Chemical used to reduce the pH and total
alkalinity in the pool water, and for cleaning chlorinator cell.
ppm - An abbreviation for parts per million the accepted
measurement of chemical concentration in swimming pool
water. I ppm- l mg/L.

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14. HENDEN™REPAIR OR
REPLACEMENT GUARANTEE
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.
Should you experience any difficulties with your Henden
product, we suggest in the first instance that you contact
the installer of the product or your local Reece Irrigation
& Pools branch.
Alternatively you can phone Henden. On receipt of your
claim, Henden will seek to resolve your difficulties, if the
product is faulty or defective, advise you on how to have
your Henden product repaired, obtain a replacement or
a refund.
Henden does not cover normal wear or tear, or damage
resulting from misuse or negligent handling, improper
use for which the product was not designed or advertised,
failure to properly follow the provided installation and
operating instructions, failure to carry out maintenance,
corrosive or abrasive water or other liquid, lightning or
high voltage spikes, or unauthorized persons attempting
repairs. Where applicable, your Henden product must
only be connected to the voltage shown on the nameplate.
Henden does not cover freight or any other costs incurred
in making a claim. Please retain your receipt as proof
of purchase; you MUST provide evidence of the date of
original purchase when making a claim.
Henden shall not be liable for any loss of profits or any
consequential, indirect or special loss, damage or injury
of any kind whatsoever arising directly or indirectly from
Henden products.
Should your Henden product require repair or service after
the guarantee period; contact your nearest Reece Irrigation
& Pools branch or phone the number below.
For a complete list of Reece Irrigation & Pools branches
visit our website reece.com.au/storefinder or contact:
TECHNICAL AND AFTER SALES SUPPORT:
1300 HENDEN (1300 436 336)
MAILING/MANUFACTURER ADDRESS:
Davey Water Products
6 Lakeview Drive, Scoresby,
Victoria, 3179
Henden Guarantee Period
Power Supply - Four Years
Electrolytic Cell - Three Years
No Chlorine Production - Check for
1. Main power outlet switched off
2. Chlorinator not plugged into main outlet
3. Pump not plugged into chlorinator
4. Time Clock set to off position/power switch turned off
5. Sanitiser Output Control turned to lowest setting
6. Chlorinator fuse blown
7. Dirty cell
8. Filter needs backwashing
9. Gas Sensor not connected
10.Running times incorrect
11. Main house fuse blown
12. Pump motor faulty
Low Chlorine Production - Check for
1. Dirty cell - clean if required
2. Filter needs backwashing
3. Display not at correct production level/cell failing
4. Winter Mode turned on
5. Pool stabiliser too low
6. pH too high
7. Salt level too low
8. Chloromatic running time inadequate
9. Sanitiser output control set too low
13. TROUBLE SHOOTING

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