Qt Series Cell - Vertical Installation Diagram - Watermaid WM10LED Owner's Handbook Manual

9. RUNNING TIMES
I) POOLS
Ideally, the timeclock should be set to operate the WATERMAID from late afternoon (e.g. 4pm)
to continue throughout the night as necessary. Remember that UV rays destroy chlorine,
which is why a chlorine stabiliser is recommended [refer to section 1(b)].
times for an average-sized domestic pool are shown in the chart below. 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. 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.
Suggested Running Times
(average-sized domestic pool)
14
12
10
8
6
4
2
Winter Spring Summer Autumn
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 when varying the operating times between
seasons is to monitor the pool daily and make adjustments accordingly. The overall aim of
sufficient running times, operation during bather hours and superchlorination, is to produce a
chlorine reading of 1 - 3 ppm. The finest detail must be discernible at the bottom of the deep
end of the pool.
II) SPAS
Running times for spas is dependent on the bather load of the spa. Initial daily testing will help to
determin the required running times. Sufficient running times and operation during bather hours
should produce a chlorine reading of 3 - 5 ppm.
10. CHLORINE DEPLETION
There are two main causes of chlorine depletion:
(a) The recent use of an algacide. Most algacides contain ammonium compounds, and chlorine
will degrade these compounds to nitrogen gas. Each litre (approx. 2 pints) of algacide will usually
contain approximately 20% algacide [i.e. 200 grams (7 oz) of 100% ammonium compounds].
For each unit of 100% ammonium compound, 9 units of chlorine will need to be
produced or added before there is a free chlorine level.
If 1 litre (2.2 pints) of algacide is added to the pool, 1,800 grams (4 lb) of 100% available chlorine
will need to be produced to neutralize the algacide alone. Also, any debris in the water will
need additional chlorination.
(b) Bather load. With sufficient running times during bather load, the WATERMAID chlorinator
will maintain a clean clear pool for about a 20 bather/hour ratio (e.g. 4 people/5 hrs, 10 people/2
hours etc).
It is important to note that contamination such as sunscreen oils and urine, as well as
from animals will dramatically destroy chlorine.
Suggested running
Public Pools may require
chlorinators, pumps and filters, as well as 24-
hour operation of the pool equipment. A "rule
of thumb" is 1 Kg (2.2 lb) of 100% available
chlorine per 20 bather hours (2 people/10 hrs
etc).
In addition to normal running hours, the
WATERMAID, pump and filter should be
run whenever bathers are in the pool.
On a monthly basis in summer
WATERMAID, filter and pump should be run
non-stop for at least 24 hours to super
chlorinate and maintain a high polish in the
pool.
14
multiple
the
CELL
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