Lectranator Systems 27316, Installation & Operation Manual

System Sizing for Swimming Pools 

System Sizing  

Use these three formulas to calculate the volume of water in the pool/spa:  

Rectangular Pool: 

Length(M) x Width(M) x Average Depth(M) x1000 = Total Litres 

Oval / Round Pool: 

Diameter (M) x Diameter (M) x Average Depth (M) x 790 = Total Litres 

Free Form Pool: 

Average Length (M) x Average Width (M) x Average Depth (M) x 1000 = Total Litres 

CRISTAL MAGIC System Production Capacity 

IMPORTANT CONCEPTS 

1 . Purifier Demand / Pool Requirements 

The rate at which purifier 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 purifier 

demand 

for

any one pool is difficult. At the end of this section, rules of thumb are provided for 

CRISTAL MAGIC System Sizing.  

THE VARIABLES ARE: 
1.   Volume and surface area of the pool /spa being purified. 

2.

Average water temperature maintained:  As the temperature of the water increases, the purifier 

demand 

will

also increase. As the temperature of the water decreases, the purifier 

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 purifiers).  

3.  Cyanuric acid level

maintained:  This chemical, when added to pool water, significantly inhibits purifier 

depletion from exposure to sunlight. Cyanuric acid also inhibits corrosion if your pool is equipped with any 
metal components. Minimum levels or better must be maintained to ensure that the purifier being 
produced is protected from UV breakdown. 

4.  Bather load: As the bather load increases, the purifier 

demand 

will also increase. 

5.

Amount of direct sunlight / UV exposure: Pools exposed to larger amounts of direct sunlight are more 
vulnerable to increased purifier loss and algae growth.  Indoor or screened pools have less purifier 

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 purifier 

demand

. 

7.

Chemical dilution:  Virtually all pool chemicals experience dilution through rainfall, adding of fresh 
make-up water due  to evaporation, splash -out, filter backwashing, leaks, etc. When freshwater is 
added, purifier 

demand 

increases for a brief period. 

8.

Main filter pump runtime and your pool's circulation patterns:  Purifier 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 purifier 

demand.  

The main filter pump runtime and/or output dial may need to be 

      increased to satisfy this higher 

demand.

Section 1 a 

3