Cleaning

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Cooling Tower Cleaning

Phone: 1300 784 093     Email: sales@ctms.net.au
  • Cooling Tower cleaning
  • Heat exchanger cleaning and gasket changeover
  • Auditing, Risk Assessment,   Risk management plans
  • Water Sampling and Analysis

Cooling Tower Cleaning

CTMS has extensive experience and training in cooling tower cleaning. Our cleaning system can improve flow, remove scale, and reduce the buildup of mould, mildew and bacteria. This reduces hiding places for legionella.    Routine tower cleaning is a vital part to proper maintenance of any Cooling Tower system. 

Cooling tower cleanings and disinfection services contribute towards energy-saving benefits and positive customer experiences through keeping heat transfer surfaces running at maximum efficiency. Operating a cleaner tower will drive maintenance personnel work ethic higher and contribute to a stronger community in the workplace. Operating cleaner, aesthetically pleasing equipment is always respected by top engineers and maintenance personnel worldwide that work on cooling tower systems.

Operators of cooling towers should schedule regular cleanings of tower basins, air intake fills, fill slats, and deck. Getting rid of any deposits, dirt, sand, debris, sludge and calcium in the process. Monthly cleaning is essential unless deposit formation requires more cleanings.  Legionella Laws now require cleanings by a certified company. Two cleanings a year are the very minimum for staying complaint under current laws however four per year is the excepted standard. It is much easier and less costly to do a simple 3 monthly clean on a regular basis rather than carry out a massive drain down and sterilization of a badly fouled tower. Increasing system downtime in the process and risking damaging company assets.

CTMS cooling tower cleaning will ensure:

1.         Your Cooling Tower assets are handled with care and handled properly
2.         Your Cooling Tower is free from Disease growth and deadly disease carrying bacteria’s
3.         A positive maintenance personnel workforce impact
4.         A cleaner tower resulting in positive brand impact 
5.         Elimination of deposits that harbor bacteria
6.         Elimination of bacteria growth sites
7.         Prevention of under-deposit corrosion
8.         Less chemical biocide usage ( Too much usage will reduce their effectiveness )
9.         Prevention and protection against legionella disease spread / growth
10.        Increase effectiveness of water treatment program
11.        Decrease workloads and stress on chillers and other refrigeration systems onsite
12.        Your cooling tower is protected during shut-down times, start-up times and during cleaning.


Cooling tower cleanings and disinfections are included in our Complete Legionella cooling water system package. Ask a service technician today about cooling tower cleaning scheduling and increase your cooling water system efficiency and reduce downtime.


In order to facilitate this, we provide services as part of our Cooling Tower Cleaning Program to ensure your tower is cleaned to standard on a regular basis: 

  • Routine cleaning and inspections in 3 monthly, 6 monthly or annually for water treatment providers.
  • Service direct to the owner on ongoing basis for overall maintenance
  • Highly recommend that consideration is given at least once a year to a thorough clean to where fill pack is removed and cleaned as well

Furthermore all our standard cleans include:

  • Chemical disinfection
  • Waterblast clean of exterior of tower
  • Mechanical condition report with photo’s of issues and tower
  • All reports and information is available direct to client via our cloud based system
  • Training on how to use this system is provided
  • Cleaning compliance to AS3666
  • Confined space entry procedures and fully certified.

 For further information or to request an inspection and a price please contact us on

Cleaning Certificate

Cleaning Certificate

Work Procedure

Work Procedure

Heat exchangers

CTMS cleans and changes gaskets for any plate heat exchanger

Cleaning

Pre-Cleaning

This includes a high-pressure water cleaning and brushed hand scrub if necessary to remove loose scaling and fouling. In the case of severe fouling or scaling, a high-pressure steam clean will follow.

Power-Blasting

For rigid scaling not dissolved in acidic or caustic solutions, powder-blasting is used along with high-pressure steam or water.

Chemical Bath

Plates are usually bathed in a proprietary series of chemicals depending on the heat exchanger application. A carefully selected process of altering chemicals, temperatures, and agitation assures the most effective cleansing process.  The desired result can't always be achieved by utilizing only one particular solution, sometimes hours in an agitated acid solution has to be followed by extended periods in a high temperature caustic solution.

Re Gasketing

CTMS can re gasket any plate heat exchanger

Initial Plate Inspection

Each plate and component is logged to assure responsibility and show transparency throughout the maintenance process of your heat exchanger. Trained experts with years of experience with all heat exchanger brands and models inspect every piece of equipment prior completing any work on the unit.

Clean & Remove Gaskets

cleaning begins with a powerful pressure wash (and brushed hand scrub if necessary) to remove product build-up and scale. Plates are then bathed in a series of non-abrasive chemicals, depending on plate material, to eliminate deposits and restore plate efficiency. To eradicate any stubborn glue, an acetone-based de-bonding agent is also used during the process.

Dye-Test

Dye-testing sets the standard for locating cracks, pinholes, and failures prior to re-gasketing the plates. CTMS is capable of detecting even miniscule imperfections. Early discovery of plate defects eliminates cross-contamination concerns, saving costly down-town in the future.  

Prepare Gasket Groove

Gasket groove preparation is imperative before applying new gaskets. Left-over glue residue can cause the new gaskets to not adhere properly and dramatically reduce the lifetime of the gaskets. Rolled grooves are the #1 cause for external leakage. If it's not identified, the plate pack will not seal properly causing costly downtime. CTMS will be able to repress the plates in most cases to allow the plate back into operation, saving money and extending the life of the heat exchanger.

Apply Gasket

Using correct adhesive is crucial in maximizing longevity of the heat exchanger. Incorrect material or adhesives results in drastically reduced up-times. Each gasket is cleaned before installation. The gasket itself is then applied only by qualified professionals that have experience with all models of plate heat exchangers.

Final Inspection

Every plate is carefully inspected for gasket straightness, solid bonding, excess adhesives, and deformations. If drawings or arrangements are supplied, the plate sequence will be returned to assembly order allowing for quick and easy installation. Plate packs sent along with frames are Water testing to simulate operating levels of the application. No plate will leave the facility without passing this final stage of quality control. If any plates immediately fail in operation*, new replacement plates will be provided at no additional charge.

 

Cleaning Certificate

 

Auditing, Assesments and RMP.

Most states require that the risk management plan (RMP) be independently audited by an approved auditor. This is the ‘statutory audit’. It should not be confused with a review of an RMP, which may be conducted at any time by a competent person.

Victoria has set the bench mark that most states following with recenvt changes in 2018 to NSW health Act.  Please refer to your states legal requirements.  CTMS can partner with you to guide you through the process.

An extract from Victoria legislation is as below to provide a guide only

The following is a summary of the changes introduced by the Act and the Regulations:

  • Registration of a cooling tower system will be done by the department rather than the Building Commission.
  • Penalties for failing to register a cooling tower system have increased significantly.
  • Registration periods can now be up to 3 years.
  • Risk management plans must now include the steps that you are taking to comply with the maintenance and testing requirements (including remedial action following an adverse test result).
  • The HCC trigger level for action has been increased to 200,000 cfu/mL and there is now an alternative process which can be followed when a high HCC result is obtained. This is described in ‘Your legal responsibilities’.
  • There is a mandatory requirement for a minimum of a Legionella test every 3 months. We still strongly recommend the risk management approach, which in most sites and systems will result in an increased level of testing that reflects the risks associated with that your system and your site.

We also now strongly recommend that your risk management plan (RMP) confirms that you have labelled the towers and the sampling point of each cooling tower system with the cooling tower system (CTS) registration number (CTS ID). The RMP template (available for download) now includes this issue.

Your legal responsibilities

The following information is a brief explanation of the requirements under the Act and Regulations. It is strongly recommended that any one developing a RMP read all parts of the legislation before completing a plan. The Act requires the following elements –

The owner of the land on which there is a cooling tower system to ensure that each cooling tower system on that land is registered with the department at all times that the cooling tower system is in operation.

The registration holder to notify the department within 30 days of:

  • a change in the ownership of the land
  • a change in their mailing address or their contact details
  • a change in the numbers of cooling towers in a cooling tower system
  • the removal or decommissioning of the cooling tower system
  • the relocation of the cooling tower system on land.

The owner of the land on which there is a cooling tower system to take all reasonable steps to ensure that a risk management plan is developed for the cooling tower system and continues to exist at all times the system is in operation. The plan must:

Address five critical risks:

  • stagnant water, including the lack of water recirculation in a cooling tower system and the presence of dead-end pipework and other fittings in the cooling tower system
  • nutrient growth, including:
    • the presence of biofilm, algae and protozoa in a cooling tower system;
    • water temperature within a range that will support rapid growth of microorganisms in a cooling tower system
    • the exposure of the water of a cooling tower system to direct sunlight
  • poor water quality, including the presence of solids, Legionellaand high levels of microorganisms in a cooling tower system
  • deficiencies in a cooling tower system, including deficiencies in the physical design, condition and maintenance of the system
  • the location of, and access to, a cooling tower or cooling tower system, including the potential for environmental contamination of the system and the potential for exposure of people to the aerosols of the system
  • address any matters raised in a report from any person engaged by the owner of the land or the owner of the cooling tower system that refers to control measures being inadequate or requiring improvement
  • Set out the steps to be taken to ensure compliance with the maintenance, service and testing requirements described in the Regulations 2009 of a cooling tower system. For example, the plan will need to describe how you will respond to an adverse microbiological test result (such as the detection of Legionellaor a high HCC result).

The owner of the land on which there is a cooling tower system to take all reasonable steps to ensure that the risk management plan is audited annually.

Owners, occupiers and managers of property should note that the Act provides the Department’s authorised officers with extensive powers of entry to sites with cooling tower systems.

The Regulations require the person who owns, manages or controls a cooling tower system to ensure that:

  • the water in the system is continuously treated with
    • one or more biocides to effectively control the growth of microorganisms including Legionella
    • chemical or other agents to minimise scale formation, corrosion and fouling
    • a bio dispersant
  • a chlorine-compatible bio dispersant is added to the recirculating water of the cooling tower system, and the system is then disinfected, cleaned and re-disinfected immediately prior to initial start up following commissioning or any shut down period of greater than one month, and at intervals not exceeding 6 months
  • the system is serviced at least once each month
  • a water sample is taken from the cooling tower system at least once each month and sent to a laboratory for a HCC count.
  • a water sample is taken from the cooling tower system at least once every three months and sent to a laboratory for a Legionella

The regulations also require the person who owns, manages or controls a cooling tower system to take certain actions following a high HCC result or the detection of Legionella.

Cleaning Certificate

Water Sampling and Analysis

CTMS can provide a water sampling service on a regular basis for all cooling towers.

Be mindful of safety issues when sampling cooling towers, since they can be located in maintenance areas and on rooftops. When practical, cooling tower fans should be turned off to stop the spread of aerosols that may be contaminated with Legionella. When fans cannot be turned off, wearing a half-face air-purifying respirator equipped with an N95 filter may be appropriate.

Respirators must be used in accordance with a comprehensive respiratory protection program which includes fit testing, training and medical clearance ahead of their use. You may also want to wear gloves for protection from chemicals used to maintain the cooling tower.

Cleaning Certificate