19
Please note that the
Low Conductivity
and
Low Conductivity Shutdown
are not like T.D.S.
meters, which are temperature compensated Scientific Instruments. Their ac curacy will be within
500ppm salinity and they are water temperature dependent, just as the Cell is.
WINTER MODE
When the Cell draws elect rical 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 CONDUCTIVITY and LOW CONDUCTIVITY SHUTDOWN on your ECO-matic 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 CO NDUCTIVITY and LOW CONDUCTIVITY SHUTDOWN to assume that
the salinity has fallen even if the salinity has remained relatively constant.
When the temperature of t he pool water drops, the
Winter Mode
Switch should be placed in AUTO
position (it can be left here all the time if desired).
This has two effects:
1.
It alters the setting of the LOW CONDUCTIVITY and LOW CONDUCTIVITY
SHUTDOWN
Systems.
2.
It reduces the
Cell Output
as the water temperature falls.
The Unit will now respond better to a cold pool environment.
The approximate temperature and Cell outputs are:
TEMPERATURE
% OUTPUT
> 72ºF
> 22ºC
100
< 70ºF
< 21ºC
85
< 64ºF
< 18ºC
75
< 59ºF
< 15ºC
70
< 54ºF
< 12ºC
65
CHEMISTRY FOR ECOMATIC COMMERCIAL
Salt
At startup of the Chlorinator System there must be at least 4,000ppm of salt (sodium chloride) in the pool water. The salt
level should not exceed 5,000ppm. This is simple to achieve if the following steps are taken:
(i)
Know, with reasonable accuracy, the pool volume.
(ii)
Measure the pool water TDS (Total Dissolved Solids or Conductivity) prior to adding salt.
Note: the Conductivity Meter should be calibrated for sodium chloride. NOTE: Do not use Rock Salt or salt which
contains YPS or Iodine. Salt should be Fine or Medium Grade Solar Salt at 99.4% PURE NaCl
(iii)
Calculate the required start - up salt dose and add it to the pool. Adding 10 kg of salt per 10,000 litres will raise
the salt concentration by 1,000 ppm (e.g. In a pool with no salt, a 100,000 litre pool will need 450 kg of salt to reach 4,500
ppm).
•
If the pool is already operating as a salt pool, simply add enough salt to bring the level to 4,500.
