Henden Mineral and Salt Chlorinator Owners Manual
12 | HENDEN INSTALLATION & OWNERS MANUAL
4. HENDEN CHLORINATOR SPECIAL
FEATURES
4.1 System control (chlorinator output dial)
The System Control varies the amount of time the cell
operates during the filtration cycle.
The System 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 System 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 System Control is set to 60%, the cell will
operate for 3 hours total over the 5-hour filtration cycle.
At 100% the cell will be ON for the entire 5 hour cycle.
When the System Control is set to 0, the cell will be OFF
for the duration of the filtration cycle. When the System
Control is set to 100%, the cell will be ON for the duration
of the filtration cycle. To turn the cell OFF, simply turn the
System Control to 0.
NOTE: It is recommended to turn the sanitiser output dial
to “0” when backwashing.
4.2 Polarity Indicators A & B
These LEDs are used to check that the cell current polarity
is reversing. Whichever is on (or brightest) indicates the
polarity of operation. The cell will operate in one polarity
for a number of hours so any change in these LEDs will
happen slowly and depend on how the unit is operated.
4.3 Low salinity indication
Your Henden Chlorinator is fitted with a number of
protective systems including the operation LED whose
primary function includes Low Salinity Indicator. As the
TDS level in the pool decreases, the wear on the cell
increases. Although salt and activator is not consumed
in the sanitisation process, it is lost through splashing,
backwashing and on bathers as they leave the pool. The
TDS level is also reduced by rain, which causes dilution
As the TDS level in the pool falls toward the minimum
TDS, the Operation LED will turn RED. At this point the
TDS level should be increased by adding the required
amount of salt as instructed by your pool water tester
or pool shop. The addition of salt should not affect the
Henden Chlorinator power supply as it is protected
against overloads. If no action is taken and the TDS level
continues to fall damage to the system may result.
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.
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. Please note that the Low Salinity
Indicator is not like TDS meters, which are temperature
compensated Scientific Instruments. The accuracy will
be within 500ppm and they are water temperature
dependent, just as the cell is.
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