Boiler and Cooling Towers Water Treatment

2026-11-03

SCOPE OF WORK : HVAC Water Treatment & Maintenance 1 . Project Objective HACLA requires a qualified contractor to provide comprehensive monthly water treatment , chemical supply , and semi - annual cleaning for the building ’ s critical cooling and heating infrastructure . The primary goal is to prevent scale , corrosion , and biological growth ( specifically Legionella ) while maintaining peak equipment efficiency . 2 . Equipment Inventory System Component Quantity Capacity / Brand Type Cooling Towers ( Server ) 2 50 - Ton ( BAC ) Open & Closed Loops Cooling Tower ( Building ) 1 350 - Ton ( Marley ) Open Loop Chiller ( Small ) 1 80 - Ton ( Carrier ) Closed Loop Chiller ( Large ) 1 278 - Ton ( Daikin ) Closed Loop Heating Boiler 1 Raypak Hi Delta Closed Loop 3 . Standard Service Requirements • Hours of Operation : Monday – Friday , 8 : 00 AM – 4 : 00 PM ( excluding holidays ). • Coordination : All service must be scheduled 48 hours in advance with the HACLA Building Engineer . • Compliance : All services must meet ASHRAE Standard 188 - 2015 and 2026 California Public Works labor standards . 4 . Technical Specifications A . Open Loop Systems ( Cooling Towers ) Frequency : Monthly 1 . Chemical Management : Supply and apply all chemicals to inhibit scale , corrosion , slime , and algae . 1 . Note for Building Tower : A Dual Biocide Program ( Oxidizing + Non - Oxidizing ) is mandatory . 2 . Water Chemistry Analysis : Test makeup and recirculating water for Calcium Hardness , M - Alkalinity , Chlorides , Iron , Conductivity , and pH . 3 . Equipment Calibration : Clean sensors and recalibrate automatic controllers and feeders monthly . 4 . Biological Testing : 1 . Monthly : Dip slide tests . 2 . Quarterly : One ( 1 ) Heterotrophic Plate Count ( HPC ) analyzed via SM9215B Protocol at a State Certified Lab . 3 . Semi - Annual / Annual : Mandatory Legionnaires ’ Disease Testing . B . Closed Loop Systems ( Chillers & Boilers ) Frequency : Monthly 1 . Inhibitor Levels : Maintain Sodium Nitrite at 800 – 1 , 200 PPM . 1 . High Temp Rule : If Boiler exceeds 185 ° F , increase levels to 1 , 000 – 2 , 000 PPM . 2 . Corrosion Control Targets : 1 . Conductivity : < 3 , 500 micromhos / cm 2 . pH Range : 8 . 5 – 10 . 5 3 . Copper : < 0 . 2 PPM | Iron : < 2 . 0 PPM 3 . Centrifugal Separator Maintenance : Execute a comprehensive plan for cleaning , lubrication , and record - keeping per manufacturer guidelines .

California

2026-03-27