Henden Mineral and Salt Chlorinator Owners Manual
14 | HENDEN INSTALLATION & OWNERS MANUAL
6. 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.
Note: The back of the unit has been designed as a heat
sink. It is normal for this area to become very hot.
7. MAINTENANCE OF THE IN-LINE
ELECTROLYTIC CELL
The in-line 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
plates 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 level
• 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 plates.
You will then be able to determine the cleaning cycle
necessary for your pool (more frequent cleaning may be
required in summer). The intervals between cleaning could
get longer to the point where cleaning is only necessary
a couple of 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.
The life of the 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.
ALWAYS INSIST ON GENUINE Henden REPLACEMENT
PARTS.
If it is necessary to replace the in- line electrolytic cell,
beware of “look-a-likes”. Only the genuine Henden cell
is designed and warranted to operate with the Henden
power supply.
SERIOUS DAMAGE MAY RESULT TO THE
ELECTRONICS INSIDE THE UNIT IF COPY CELLS
ARE USED AND MAY VOID WARRANTY.
7.1 To clean the Henden in-line cell
Ensure that the power supply is turned off – failure to do
so may result in the pool pump turning on while the cell is
not in place. Disconnect the cell lead and flow switch from
the cell and remove the cell from the pool return line by
undoing the unions, taking care not to lose the o-rings.
Method
Assemble a blanking cap from the supplied plug, o-ring
and lock ring.
Install the blanking cap onto the end of the cell opposite
the flow switch port.
Secure the cell in a vertical position with the blanking cap
at the bottom, to catch any spills the cell should be placed
in an acid proof container.
Add 50mL of HYDROCHLORIC ACID to 500mL of WATER
in a suitable sized container, carefully pour the solution
into the open end of the cell.
NOTE In areas with hard water,
reverse polarity systems may require
occasional manual cleaning.
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