throughout the night as necessary. Remember that UV rays destroy chlorine, which is
why a chlorine stabilizer is recommended [refer to section 1(b)].
The hours of operation required for summer may vary from 8 to 14 hours or more. This is
because it takes at least 6 hours to pass the total volume of pool water once through the
filter.
(ii) SPAS
The running time of the chlorinator is dependant on the bather load of the spa. Daily
testing will determine the required running time for your particular situation.
(iii) SWIMMING POOLS AND SPAS
(iv)
A "rule
of
thumb"
is
one
litre
(2
pt)
of
chlorine
per
20
bathers
per
hour.
Running times will depend on bather load, water temperature, time of year, pump
efficiency, salt level, Cell age and condition, cyanuric acid levels, pH, sunlight, water
chemistry and the effects of surrounding vegetation.
In addition to normal running hours, the WATERMAID chlorinator, pump and filter
should be run whenever bathers are in the pool or spa.
On a monthly basis in summer the WATERMAID chlorinator, filter and pump should be
run non-stop for at least 24 hours to super chlorinate and maintain a high polish in the
pool. Super chlorination and chlorinator operation during bather load are IN ADDITION to
normal running times. If a solar heater is installed and running times are set for
chlorination and filtration in the daytime, extra chlorination in non-sunlight hours may be
required. The only way to determine the needs of the pool or spa when varying the
operating times between seasons is to monitor the pool or spa daily and make adjustments
accordingly.
The overall aim of sufficient running times, operation during bather hours and super
chlorination, is to produce a chlorine reading of 1 to 3 ppm for pools and 3
–
5 for spas.
The finest detail must be discernible at the deepest part of the pool or spa and the water
should be clear.
For new pools, the WATERMAID chlorinator, pump and filter may need running
continuously for a number of days before all debris is removed, stains oxidized and there is
a chlorine residual in the pool.
9. CHLORINE DEPLETION
There are two main causes of chlorine depletion:
(a) The recent use of an algaecide. Most algaecides contain ammonium compounds and
