System Sizing
Use these three formulas to figure your correct water volume:
Rectangular Pool: Length (feet) x Width (feet) x Average Depth (feet) x 7.5 = Total Gallons
Lenght (m) x Width (m) x Average Depth (m) x 1000 = Total Litres
Oval / Round Pool: Diameter (feet) x Diameter (feet) x Average Depth (feet) x 5.9 = Total Gallons
Diameter (m) x Diameter (m) x Average Depth (m) x 790 = Total Litres
Free Form Pool: Average Length (feet) x Average Width (feet) x Average Depth (feet) x 7.5 = Total Gallons
Average Length (m) x Average Width (m) x Average Depth (m) x 1000 = Total Litres
Lectranator’s System Production Capacity
1. Sanitizer Demand / Pool Requirements
The rate at which sanitizer is consumed
in any swimming pool depends on the relationship of eight major variables. Since these
variables can vary widely from pool to pool and season to season, precise prediction of the sanitizer demand
for any one pool is
difficult. At the end of this section, rules of thumb are provided for Lectranator System Sizing. Given all the variables, should you find
the unit unable to keep up with the sanitizer demand in your pool (assuming it is being operated correctly), we suggest increasing the
output through a larger or multiple units.
THE VARIABLES ARE:
1. V
olume and surface area of the pool / spa being sanitized.
2. A
verage water temperature maintained:
As the temperature of the water increases, the sanitizer demand will also increase.
As the temperature of the water decreases, the sanitizer demand
will also decrease. When this happens, the output dial
should be decreased to compensate for this lower demand (which will also protect your equipment from excessive levels of
sanitizers).
3. Cyanuric acid level maint
ained: This chemical, when added to pool water, significantly inhibits chlorine depletion from
exposure to sunlight. Cyanuric acid levels must be maintained between 30 and 100 ppm to ensure that the chlorine being
produced is protected from UV breakdown.
4. Bather load: As the bather load increases, the sanitizer demand will also increase. Heavy uses of the spa (excessive conta-
mination) may require longer recovery times (a return to a minimum of 3 ppm bromine). Recovery time may be reduced by
adding a shock compound to the water.
5. Amount of direct sunlight / UV exposure:
Pools exposed to larger amounts of direct sunlight are more vulnerable to
increased sanitizer loss and algae growth. Indoor or screened pools have less sanitizer demand
.
6. Exposure to vegetation and airborne debris: Dense landscaping near the pool, along with increased nitrate levels (urine,
bird droppings, fertilizer, well water, etc.) greatly contribute to increased sanitizer demand.
7. Chemical dilution:
Virtually all pool chemicals experience dilution through rainfall, adding of fresh make-up water due to evap-
oration, splash-out, filter backwashing, leaks, etc. When freshwater is added, sanitizer demand increases for a brief period.
8. Main filter pump runtime and your pool’
s circulation patterns: Sanitizer can only be produced while the main filter pump is
operating. Waterfalls/Fountains and other water features operated by the filter pump can directly effect sanitizer demand. The
main filter pump runtime and/or output dial may need to be increased to satisfy this higher demand
.
3
System Sizing For Swimming Pools
Section 1 a
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