Cooling Tower Control Procedure

COOLING TOWER CENTRAL PROCEDURE

A. Corrosion Inhibitor

    1. add two total tower inhibitor in the estimated starting dosages
    2. check weekly - pH, conductivity, Molybdenum
    3. adjust dosage based on weekly checks
    4. send sample to lab monthly
    5. adjust dosage based on lab results
    6. visually inspect tower quarterly

B. Biological Control

    1. add biocide A or B based on estimated starting dosage
    2. check weekly - visual test and odor
    3. Alternate biocide A and B to prevent resistant strains from developing
    4. send sample to lab monthly
    5. adjust dosage based on lab results
    6. visually inspect tower quarterly

TYPICAL COOLING TOWER CONTROL RANGES

Item	Control Range
Appearance
Conductivity	800-1200
pH	7.5-9.0
T Hard	800 max
Cl
p Alk	100 max
T Alk	100-400
T.I. Phos	4-8
Moly	4-8