Zodiac ClearWater LM2 User manual

You have chosen
a CLEARWATER®salt chlorinator
by ZODIAC because it makes life
stress-free and relaxed.
The LM2 is a pole reversal
model. The electrodes are
self-cleaning to minimise your
maintenance time.
Processing is non-stop and
reduces maintenance to a simple
check of the water pH levels.
Thank you for purchasing
our CLEARWATER®water
processing system, we recommend
that you read these instructions
carefully before installing
and using it.
contents
How does your CLEARWATER® system work ? 13
The controls on your CLEARWATER® system 13
Indicators and buttons 13
Installation
Installation of the cell 15
Installing the control box 15
How to connect the control box to the cell 15
How to connect the control box to the pump 15
Usage recommendations
Filtering times 16
Water balance 16
Standard maintenance checks 18
Maintenance of your CLEARWATER® system
Cleaning the electrodes 19
Damage caused by insects 19
Solutions to possible problems 20
Warnings 21
Your guarantee 21

When your CLEARWATER® system is installed, a pre-defined quantity of salt
is dissolved into the swimming pool’s water.
This very slightly salted water is then passed through the CLEARWATER®
cell. Chlorine is produced which destroys the microbes.
The cell constantly replenishes the active chlorine that vanishes under
the sun’s UV rays. You don’t have to do anything.
Your salt chlorinator is operational during the filtering processes.
Everyday, therefore, during the filtering process,
dust and residue are collected by the filter, while your
CLEARWATER® system is disinfecting the water and
making it healthy and crystalline.
All you have to do is to check water balance as usual,
and in particular maintain the pH and TAC levels.
(H) ON/OFF : Controls the starting and stopping of the salt chlorinator.
Useful for maintenance operations.
N.B. : For the models without a clock, when the chlorinator is stopped
by the "OFF" button, it restarts automatically the 1st time the pump
restarts.
(F) Output : regulates the hourly production of chlorine.
Pressing the button moves the cursor from left to right (maximum).
Press it once more and it goes back to the minimum.
(G) Super-chlorination : Used for rapidly increasing the chlorine in
the swimming pool on a one-off basis. To do this, leave the filter pump
on override during the super-chlorination period. The pump must run for
24 hours and pushing the super chlorination button automatically sets
the chlorine production level to maximum.
This super-chlorination process can be interrupted or restarted at any
given time by using the super-chlorination button. When this function
is activated, previous settings are ignored.
(B) Chlorine Output : A series of 6 lights indicate the CLEARWATER®
production setting. The further the light is towards the right of the scale,
the higher the level of production
N.B. : This indicator does not give the level of chlorine in the water,
it gives information on the hourly production of the system.
To find out the level of free chlorine in your pool, you must use
your usual test kit.
The controls on
your CLEARWATER®
system
How does your
CLEARWATER®
system work ?
Indicators and buttons
Intelligent
control box
Cell : production
of active chlorine
from the
salt-water
Filter Pump
You will need to provide the salt
+ extra quantities at the beginning
of the season
Piscine (eau salée)
ABCD
FG H
E

14
Warning
It is imperative that the salt chlorinator is installed by an experienced
swimming pool professional.
The CLEARWATER®‚ LM2 model salt chlorinator has been IP24 tested
and approved. Its connection to the mains electrical network and
its positioning in relation to the pool must be carried out in accordance
with the standards and regulations in force in each country.
It is important that salt is put into the pool before starting up
the chlorinator (see chapter 4.b : the water balance).
Volume of water (m3)Quantity of salt (kg) to be added
when starting up, to obtain 4 g/l
40 160
50 200
60 240
70 280
80 320
90 360
100 400
Installation
(A) Production of chlorine, first yellow diode flashing :
This diode flashes for a few minutes when the cell is in pole reversal
phase. During this period, the production of chlorine is stopped.
The polar reversal cycle is 5.8 hours.
(C) Super-chlorination :
Indicator lit-up, this is indicating that the super-chlorination function
has been selected. It will go out as soon as the super-chlorination process
has finished.
Indicator not lit-up, the function has not been selected.
(D) Add salt :
Indicator lit-up, this indicates an insufficient level of salt, between
3 and 4 g/litre. Network voltage that is too low or cold water temperature
can also cause it to light up, even if the salt level is correct.
Operating the LM2 with salt levels that are too low reduces the life-span
of the electrode.
Indicator not lit-up, This indicates that the salt level is correct.
(E) No flow : This indicator lights up to show that the flow of water
in the cell is insufficient (generally as a result of a pump stoppage).
The production of chlorine is therefore stopped.
This red indicator can also be triggered by the disconnection of the third
wire on the electrode (the blue one).
None of the indicators are lit up : This means that the LM2 is not
functioning. Check the fuses and switches.

It must be positioned after the heating and the filter.
This must be the last fitting before the inlet.
The cell must be horizontal : The water input and output will be pointed
downwards.
Water can circulate in both directions.
For the gluing : the pipe unions are in moulded ABS polymer.
They can be glued to the PVC pipes using a suitable PVC glue.
First of all clean the surfaces to be glued with a solvent and then glue.
Hold in position for at least 30 seconds.
If you choose to install the cell with a bypass routing, we recommend
that you use a non-return valve and not a manual valve between
the CLEARWATER® and the inlet.
Important :
> The water pressure in the cell must not exceed 2 bars.
> The water temperature must not exceed 40°.
> If you choose to install shut-off valves, stop the pump then the
CLEARWATER® system before handling the valves. No current must reach
the electrodes when the valves are closed because this can damage
the cell. Make sure that the valves are open again before re-starting
the pump and the CLEARWATER® system.
Fix the control box to a wall within 1.5 m from the cell and 1.2 m above
the ground, respecting safety regulations in terms of the distance from
the pool (this must be at least 3 metres from the edge of the pool).
If the control box is installed on a pillar, it must be placed on a flat
and watertight panel at least 24 cm wide and 44 cm high.
Do not enclose the control box in an outer shell.
Do not install it above a source of heat.
It is preferable, but not essential, to place it in a shady area, sheltered
from the rain and direct sunlight.
Connect the power cable to the electrode terminals.
Blue with blue and black with black.
Make sure that the connections are firmly attached.
Connect the electric cable from the CLEARWATER® electrolyzer’s control
panel to the clock in the switch cabinet that controls the pump
(servo-system from the electrolyzer to the pump).
Wait 24 hours to allow the PVC glue to
set perfectly on the cell’s connections.
15/LM2
Installation of the cell
Installing the control box
How to connect
the control box to the cell
How to connect
the control box to the pump
Electric control panel with clock
Pump

16
The LM2 functions only operate during the filtering process.
For an outdoor pool, run the pump + chlorination system for 6 to 8 hours
per day. To reduce the effect of UV reduction of chlorine it is preferable to
run it at the end of the day or early in the morning when it is cooler.
During very hot periods, it can be necessary to increase operation time
to approximately 10 hours per day.
If the filtering system has to be in operation for more than 10 hours per
day (in particular during the period when the temperature rises, when
there is a heating system), it can be necessary to reduce the production
level (button E) so as to avoid over-chlorinating the pool.
In winter, operation time should be reduced to 2-3 hours or the system
is stopped completely and the pool is closed down for the winter,
so as to prolong the life-span of the electrodes.
For indoor or covered pools, these standard times should be heavily
reduced or the production of chlorine lowered to avoid excessive chlorine
levels.
To be sure that your chlorinator is operating at its optimum,
the water balance must be regularly checked and maintained :
Salinity 4 kg of salt per m3
pH 7.2 to 7.6
Chlorine stabiliser 40 to 75 g per m3
TAC, total alkalinity 8 to 12° (French)
Free chlorine 1.5 to 3 ppm
TH 10 to 30° (French)
You can modify this by changing the operation time or varying the hourly
production (button E).
From time to time extra salt is necessary. The best times are just before
the summer or when you start up the system after a prolonged stoppage.
> First of all you should analyse the salt level.
> Turn off the chlorinator before adding the salt.
> Add boiled salt at 99.9% to attain a concentration level of 4 g/litre.
> A bag of 25 kg of salt increases the concentration level by 0.5 g/litre
for a pool of 50 m3.
> Add a maximum of 2 bags of 25 kg at a time.
> For the salt directly into the swimming pool and not into the skimmers.
> Run the filtering system for 4 or 6 hours to disperse the salt,
but 24 hours are necessary for it to be completely dissolved.
> Repeat the operation if you have not obtained the ideal level
of concentration.
Only now can one restart the chlorinator.
Usage
recommendations
Filtering times
Water balance
• Free chlorine level
• Salinity

It is desired that the water’s pH is maintained between 7.2 and 7.6
(7 for pools in polyester).
Low pH : Irritates one’s eyes and corrodes metal parts.
To increase it, use pH +. Check the water’s pH 2 hours after each new
input has completely dissolved.
High pH : Increases lime deposits, makes the water cloudy and hinders
the disinfectant qualities of the chlorine.
To lower it, use a pH – or hydrochloric acid. Work in stages,
1 litre of acid at a time and checking the pH between each new input.
If you are unable to maintain a correct level of pH, check your TAC.
Total alkalinity must be between 8 and 12° (French).
This is the measurement of all the alkaline products present in your
swimming pool’s water.
If the alkalinity is too low the pH will continually go up and down.
To increase it, add some TAC equaliser or some sodium bicarbonate.
Add small quantities at a time once a day to attain 8 to 12° (French).
If the alkalinity is too high deposits will accumulate on the electrodes
of the chlorinator and on the walls of the pool…
To reduce it, add 0.4 g/litre of pH - or hydrochloric acid each day until
the alkalinity value measured at least 24 hours afterwards is back down
to between 8 and 12° (French).
It is preferable for correct operation that the TH be no higher than 30° Fr
(300 ppm).
To soften the water, use the dealkalization process :
> Fill up the pool to its maximum, add some pH + or sodium carbonate
(Na2CO3) to bring the level of pH up to the zone between 9.5 and 10.
Use the non-filtering circulation mode (position “circulation”
on the 6-way valves).
> Allow for 100g of Na2CO3per m3of water and for every 10° of reduced
hardness.
E.g. : Pool of 80 m2with water at 40° TH that you want to reduce
to 20° TH.
100 x 80 x 2 = 16 kg of Na2CO3
> Stop the pump when the water in the pool becomes cloudy.
> Allow this precipitation process to continue for 12/24 hours, taking care
not to disturb the water. The particles will go down to the bottom
of the pool.
> When the deposit is on the bottom, vacuum with the hand sweeper
and evacuate directly into the drain.
> Then bring down the pH.
The sun destroys the chlorine. In order to protect it, a chlorine stabilizer
should be used to obtain a minimum level of 40 g per m3of water.
Do not exceed 75 g per m3,this would have gradually the reverse effect
by reducing the power of the chlorine.
17/LM2
• The pH
• The TAC, total alkalinity
• The TH (Total Hardness of the water)
• Chlorine stabilizer

Every week :
> Visual inspection of the electrodes: remove the foreign bodies that have
come through the filter and sometimes remain stuck in the body of the cell.
Be careful not to deform or scratch the electrodes.
> Check the level of free chlorine.
> Check the pH.
> Check the sand filter, and clean it if necessary (backwash*).
> Check the pump’s pre-filter
Every month :
> Check the level of salt in the water.
> Check the TAC.
> Check the level of chlorine stabiliser.
*Backwash :
We recommend that you set the production rate of your electrolyzer to
minimum when carrying out a backwash of the filter. If your prefer to turn it
off and isolate it during the backwash, we recommend that you disconnect
the blue wire on the sensor. The appliance will then remain switched-off and
will ignore the re-start command sent by the pump.
In this case, remember to re-connect the blue wire on the sensor once you
have finished your maintenance operation.
18
Standard maintenance checks

In certain regions, where the water is very hard, the self-cleaning
electrodes can very occasionally need a manual clean.
Proceed as follows :
> Stop the CLEARWATER® system.
> Stop the filter pump.
> Disconnect the blue wire from the electrode.
> If there are valves, close them to isolate the cell. Never close the valves
without making sure that the CLEARWATER® system has been stopped
and that it cannot restart.
If it were to restart, the cell could explode.
> Disconnect the power cable from the electrode terminals.
> Unscrew the two pipe unions that attach the body of the cell to
the piping and carefully remove the assembly.
Lay it down flat, with the entry/exit openings facing upwards.
> Pour the cleaning solution into the body of the cell until the electrodes
are completely covered.
> Allow the solution to act for about ten minutes, enough time
for the calcium scale to dissolve.
> When the electrodes have been cleaned, remove the solution.
N.B. : This cleaning solution can be purchased from your specialist
swimming pool dealer. To make it up yourself, add one part
hydrochloric acid to 10 parts water. Always add the acid to the water
and never the reverse. Mix it thoroughly to make the solution
uniform.
> Rinse the electrodes in running water.
> Reassemble the electrodes, tighten the pipe unions and make sure
that there are no leaks.
> Open the stop valves.
> Replace the electrical connections on the electrodes.
> Restart the filter pump and the LM2.
> Make sure the chlorine production setting is correct.
The LM2 control box is equipped with small openings designed to avoid
the overheating of the internal components in hot climates.
Small insects can sometimes cause problems if they get into the box.
To avoid this, spray the surfaces near the openings with insecticide.
Maintenance of your
CLEARWATER®
system
19/LM2
Cleaning the electrodes
Damage caused by insects

PROBLEMS
The water looks fine,
but the chlorine
is not shown
in the analysis
Green water and
no chlorine shown
in the analysis
Smell of chlorine
Sticky sides
of the pool
Eye or skin irritation
Scale forming
on the equipment
and pool sides
The production
of chlorine cannot
reach the maximum
level.
The “water safety”
indicator is lit up
None of the
chlorinator’s
indicators are lit up
CAUSES
> High PH
> Not enough
stabilizer
Chlorine level
too low
Not enough chlorine
Algae growing
Incorrect level
of pH or presence
of chloramines
in the water
> Incorrect pH
and very hard water
> Or total alkalinity
too high
> Level of salt below
4g/l
> Or cold water
> Or the electrodes
are in pole reversal
phase
> Or the electrodes a
re damaged
> Flow of water is
nil or insufficient.
> Or the blue sensor
is not connected
> The unit has been
stopped
> Or the power
supply has been cut
or a fuse has blown
SOLUTIONS
> Set the pH between
7.2 & 7.6
> Check that the
electrodes are clean
> Check the stabiliser
level (cyanuric acid)
> Super-chlorination
> Or immediate
chlorination using
normal oxidising product
> Super-chlorination
> Or immediate
chlorination using
normal oxidising
product
> Sweep the sides
of the pool and
vacuum or filter
> Then immediate
chlorination
> Adjust the pH to
between 7.2 & 7.6
> Immediate
chlorination process
if no improvement
> Adjust the pH to
between 7.2 & 7.6
> Or lower the TH
(10 to 30° Fr.)
> Lower the TAC
> Add salt
> Or increase the
production time
> Wait 3 minutes for
the electrodes to go
back into their normal
cycle
> Replace the
electrodes
> The filter needs
cleaning, or a pocket
of air has built up in
the cell
> Reconnect the blue
sensor
> Use the Start/Stop
control (Button H)
> Check the power
supply and check
the chlorinator’s fuse
Solutions to possible
problems
20

a > The CLEARWATER® salt chlorinator must be installed by a professional
swimming pool specialist. Its installation and its usage must respect
the recommendations made in this manual.
b > Do not handle the sand filter’s 6-way valves or the stop valves
when the pump is in operation. You could damage the cell.
The valves must all only be handled when the pump has been stopped
and the pressure has dropped.
c > Handling of the stop valves should be carried out in the following manner :
- Stop the LM2 (button H).
- To prevent any false manoeuvre from hindering maintenance operations,
remove the third small blue wire from the electrode and make sure that it is
not in contact with the terminals : you are now certain that your appliance
cannot restart.
- Close your valves.
- Proceed with your maintenance operations.
- When maintenance is finished, open all the valves again to operate as
normal, then re-start the pump, and finally reconnect the third small blue
wire to the electrode.
If you do not follow these instructions, there is a risk that the
cell/electrode assembly could explode.
d > Do not scrape the electrodes with a metal object, and do not deform them.
e > Protect the electrode terminals with a little silicon grease. Only use
silicon grease, any other type of grease can damage the waterproofing seal
and the joints. Do not submerge the terminals in hydrochloric acid,
and avoid contact with salted water.
f > Water above a temperature of 40° must not pass through the cell.
g > The water pressure in the cell must not exceed 2 bars.
h > Periodically check the cell to remove any debris that the pool's filter
might have allowed through.
i > The control box must not be installed directly above a source of heat
such as the pump or the heating system. It must be at least 30 cm from
the ground to enable the air to circulate freely all around, and it must not
be fitted into a closed outer shell.
j > The life-span of the electronic fittings of the LM2 and of the appliance
in general will be increased if protected from direct sunlight.
Warnings
21/LM2
a > Conditions
All our technical experience and concern for quality has been used in the construction of our equipment. It is subjected to
numerous quality controls.
Our models are regularly updated and improved to make the most of technological advances. It is understood that these
improvements cannot be added to previous models within the context of our guarantee.
If, in spite of all the care and know-how used in the manufacture of our products, you were to have need of the guarantee,
please be aware that it only applies to the free replacement of faulty parts. Transport and labour costs remain your
responsibility.
b > Length of guarantee
The control box and the cell of your CLEARWATER® chlorinator have an unconditional guarantee: whatever the causes of their
deterioration, they will be mended or exchanged within a period of 24 months following your purchase.
c > Object of the guarantee
During the guarantee period defined above, any part recognised as faulty will be mended or exchanged by the manufacturer with a new part or
in correct operating condition.
In all cases, travel and labour costs will be the responsibility of the user. In the event of a return to the workshop, return
transport costs will be the responsibility of the user, but labour costs remain the responsibility of the manufacturer.
The immobilisation and the prevention of possession of an appliance in the event of any necessary repairs cannot give rise to compensation.
In all circumstances, the legal guarantee of the seller continues to be applied in accordance with article 4 of decree n° 78-464 of 24 March
1978. The legal guarantee of article 1641 of the civil code is applied.
d > Transport damage
Appliances always travel at the risk and peril of the user. It is up to the latter, before taking delivery of the appliance, to check that it is in
perfect condition and if necessary to voice reservations on the haulage contractor's delivery slip.
Under no circumstances can we be held responsible for transport damage.
e > Laws and disputes
This guarantee is subject to French law and to all European directives or international treaties that are applicable in France and in force at the
time of the complaint. In the event of a dispute over its interpretation or its execution, French courts have exclusive jurisdiction.
Your guarantee