Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS User Manual download pdf (Page 45)

Installation and Service Manual

Chlorine residual is the chlorine remaining in the pool water

after it is consumed in the process of destroying bacteria, algae

and other oxidizable materials. Total alkalinity is the

measurement of the total amount of alkaline chemicals in the

water. Alkalinity controls pH. Sodium bicarbonate is used to

raise total alkalinity. Calcium hardness can be raised by the

addition of calcium chloride, and lowered by the addition of

Tri-sodium Phosphate or its equivalent. The corrosive level of

pool water can also be measured by the Ryznar Stability Index.

This index is calculated by a formula which uses operating

temperatures, total alkalinity, pH, calcium hardness and total

dissolved solids. The Ryznar Stability Index is able to predict

more accurately the scaling or corrosive tendencies of

swimming pool water. Balanced water within the guidelines of

the Ryznar Stability Index are from 6.3 - 6.7. Use of the

Ryznar Stability Index may help prolong the service life of

pool equipment, which in turn will be a cost savings to the

commercial pool owner. Your pool dealer can provide

additional data and equipment to make this measurement if a

problem exists.

Refer to Circulating Pump on page 46 for information relating

to pump wiring.

Btu/Hr Approximate

Input Controls Fans Pump Total Amps

500,000 3.6 2.7 5.0 11.3

650,000 5.4 3.4 5.0 13.8

750,000 5.4 3.4 5.0 13.8

990,000 7.3 3.2 7.4 17.9

1,260,000 7.3 3.2 7.4 17.9

1,440,000 7.3 6.7 7.4 21.4

1,800,000 7.3 6.7 8.8 22.8

2,070,000 7.3 6.7 8.8 22.8

TABLE-Q

AMP Draw Data

Test Recommended Level

Correct pH 7.2 - 7.8

Chlorine Residual 1.0 - 5.0 PPM

Total Alkalinity 80 - 120 PPM

Calcium Hardness 175 - 350 PPM

TABLE-P

Recommended Water Chemistry

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 59 60

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Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS User Manual Page 45