Cooling Tower and Chillers Systems Installation and Maintenance

 1. Operation & Maintenance of Chilling Tower (Closed Loop) System

We provide qualified personnel, familiar with all the required services and tasks associated with operations and routine preventative maintenance of the Chilling Tower System. We will support emergency on-call services.

  • Perform daily operational and maintenance tasks, and routine preventative maintenance on the facility’s Chilling Tower equipment.
  • Provide a representative to attend daily maintenance meetings with management to coordinate all work, (to include but not limited to PM, PMI, repairs, and upgrades,).

 

Chiller Units:

  • Perform chemical testing of system water. Treat as needed to ensure proper water chemistry and freeze protection.
  • Inspect gearbox for excessive wear. Repair or replace as needed.
  • Check control system and devices for evidence of improper operation. Clean, lubricate, repair, adjust or replace components as needed to ensure proper operation.
  • Check fan belt tension. Check for belt wear and replace if necessary to ensure proper operation. Check sheaves for evidence of improper alignment or evidence of wear and correct as needed.
  • Check variable-frequency drive for proper operation. Correct as needed.
  • Check control box for dirt, debris, and/or loose terminations. Clean and tighten as needed.
  • Check motor contactor for pitting or other signs of damage. Repair or replace as needed.
  • Check fan blades and fan housing. Clean, repair, or replace as needed to ensure proper operation.
  • Check refrigerant system pressures and/or temperatures. If outside of recommended levels, find cause, repair, and adjust refrigerant charge to achieve optimal operating levels.
  • Check open drive alignment, wear, seating, and operation. Repair or replace as needed.
  • Assess field-serviceable bearings. Lubricate if necessary.
  • Check for evidence of buildup or fouling on heat exchange surfaces. Restore as needed to ensure proper operation.
  • Check for proper fluid flow and for fluid leaks. Clean, adjust, and repair as needed to restore proper flow.
  • Inspect air-cooled condenser surfaces for damage or evidence of leaks. Repair or clean as needed.
  • Check low ambient head pressure control sequence for evidence of improper operation.
  • Check compressor oil level and/or pressure on refrigerant systems having oil level and/or pressure measurement means. Repair, Replace, or adjust as needed to ensure proper control.

Fan – Coils:

  • Check for particulate accumulation on filters. Clean or replace as necessary to ensure proper operation.
  • Check system traps, pumps, and controls. Clean or replace as needed to ensure proper operation.
  • Check control system and devices for evidence of improper operation. Clean, lubricate, repair, adjust, or replace components as needed to ensure proper operation.
  • Check P-trap. Prime as needed to ensure proper operation.
  • Check fan belt tension. Check for belt wear and replace if necessary to ensure proper operations. Check sheaves for evidence of improper alignment or evidence of wear and correct as needed.
  • Check for proper cooling operation and for damage or evidence of leaks. Clean, restore, or replace as required.
  • Check air filter fit and housing seal integrity. Correct as needed.
  • Check control box for dirt, debris, and/or loose terminations. Clean and tighten as needed.
  • Check fan blades and fan housing. Clean, repair, or replace as needed to ensure proper operation.
  • Check integrity of all panels on equipment. Replace as needed to ensure proper integrity fit/finish of equipment.
  • Assess field-serviceable bearings. Lubricate as necessary.
  • Check for proper fluid flow. Clean, adjust, and repair as needed to restore proper flow.
  • Check drain pan, drain line, and coil for biological growth. Clean as needed.
  • Check coil fins. Restore if possible. Replace coil if necessary to return to proper functioning.
  • Inspect for evidence of moisture carryover beyond the drain pan from cooling coils. Make corrections or repairs as necessary.
  • Check for proper damper operation. Clean, lubricate, repair, replace, or adjust.
  • Visually inspect areas of moisture accumulation for biological growth. If present, clean or disinfect as needed.
  • Check condensate pump. Clean or replace.

 

2. Operation & Maintenance of Cooling Tower (Open Loop) System

We provide qualified personnel, familiar with all the required services and tasks associated with operations and routine preventative maintenance of the Cooling Tower and Systems. Personnel will maintain the systems in a manner to ensure system operations. We will support emergency on-call services.

  • Perform daily operational tasks and routine preventative maintenance on the area Cooling Tower support equipment.
  • Provide a representative to attend daily maintenance meetings with management to coordinate all work, (to include but not limited to PM, PMI, repairs, and upgrades,).
  • Provide all chemicals and associated Material Safety Data Sheets (MSDS).
  • Test for bacterial presence using test kits. Presence of bacteria will be used as a guide for required chlorine levels, or shock treatments to control excessive bacterial presence.
  • Shock treatment applied as needed per daily visual inspection, with chlorine Super/Hyper chlorination), or chlorine free (Oxidizer and Sanitizer) shock treatments to kill active algae growth. Shock treatment is recommended when any of the following conditions apply:
  1. The free or total halogen lower limit has not been met for 48 hours or more;
  2. There are two total MB count test results greater than104 CFU/ml in a row;
  3. The anaerobic test result comes back “positive”.
  • Test, adjust, and maintain safe chemical levels in the water.
  • The cooling water can be tested for total microbiological (MB) counts (aerobic planktonic bacteria, 48 hour incubation) once per preventative maintenance schedule.
  • Clean tower basin (sludge removed) whenever the whole cooling tower is down.
  • Inspect water inlets for plugging during shutdowns and clean as necessary.
  • Establish and perform startup procedures, to include, but not limited to: Disinfect the tower, first with shock treatment with hypochlorite, followed by a non-oxidizing biocide when halogen residuals return to normal.
  • Control input water temperature to avoid temperature ranges where Legionella grow. Keep cold water below 25° C (77° F) and hot water above 55° C (131° F).
  • Apply biocides in accordance with label dosages to control growth of other bacteria, algae, and protozoa that may contribute to nutritional needs of Legionella. Rotating biocides and using different control methods is recommended. These include thermal shock, oxidizing biocides, chlorine-based oxidants and ozone treatment.
  • Conduct routine periodic “back-flushes” to remove bio-film buildup on the inside walls of the pipes per the preventative maintenance schedule.

General

  • Provide all specialty tools and test equipment necessary to support all maintenance functions associated with the Cooling Tower.
  • Install all new parts and/or equipment per manufacturer’s specifications.
  • Provide all warranty information on installed equipment in writing and include what is covered, start/end coverage date. Warranty information must be provided before any project is closed and before final payment is made.
  • We are responsible for all pre-engineering work for maintenance projects, and for the accuracy of all measurements.
  • We provide all chemicals necessary for the work required, and associated Material Safety Data Sheets (MSDS).
  • We provide all equipment manuals for newly installed equipment.
  • Time lines must be submitted for all maintenance project work, to include start date, milestones, progress dates against completion, and completion date.
  • Submit a weekly activity report on the progress of maintenance activities and/or maintenance project work.
  • Maintain accurate log to include, but not limited to, date/time and results of: visual and preventative maintenance inspections to pool and equipment; water testing and treatments; equipment failures and/or decreased operational status; suggested/required repairs; and maintenance actions/repairs on equipment.