Chilled Water Solutions

The chilled/closed water loop transfers heat between AHU/FCU and the chiller. The term “closed loop” seldom means that the chilled water is free from contamination or bacteria. Depending on the incoming water, minerals will deposit in the system over time. Bacteria are present everywhere and can also enter the closed loop. Thus it is important for chilled water systems to be commissioned and treated well, aiming to prevent loss of heat transfer due to fouling, scale or corrosion, and aiming to prevent damage to major equipment such as AHU/FCU, sensors, thermometers, motorized valves and pumps.  Although the low temperature is not conducive for Legionella bacteria, other bacteria including iron bacteria still prevail. Therefore, sufficient care has to be taken to ensure occupants’ health and reduce the corrosion risk.

Browse through our site to get to know all the products from the Clean CT-01™ family. Find out more about our solutions to all the various water treatment needs of air-conditioning and boiler systems.

 

Chilled water products

The Great Little Water Company offers three proven solutions to help commission, maintain and revive closed water loops. The following Clean CT-01™ products are easily applied by site maintenance personnel or contractors:

 

1. Pipe Flusher

The Pipe Flusher is a comprehensive system to flush newly installed air-con and boiler water loops. It helps get the best out of the air-con system with minimal hassle during commissioning. Pipe Flusher removes all unwanted dirt and leaves behind a corrosion-resistant inner surface of your piping while consisting of 100% non-toxic and non-harmful chemicals.

Flushing of newly installed piping systems is an essential step in commissioning new air-conditioning systems and other water loops. Temporary coatings, chemicals, dirt, dust and corrosion are removed during this process which have entered or occurred during the installation works.

Pipe flusher is a ready-to-use product. It is administered by maintenance personnel or contractors. GLWC does not need to be on site. The product comes with easy to follow instructions.

Please use our contact form to obtain pricing or request further details.

 

2. Pipe Cleaner

Use the Pipe Cleaner for rehabilitation and cleaning of existing piping systems and water loops. Removes build-up of fouling, scale and other contaminants from the inside of existing and old systems. Specially designed for Open & Closed air-conditioning loops, boilers, cooling towers etc.

Like the Pipe Flusher, the Pipe Cleaner removes all unwanted dirt and leaves behind a corrosion-resistant inner surface of your piping while consisting of 100% non-toxic and non-harmful chemicals.

Pipe cleaner is a ready-to-use product. It is administered by maintenance personnel or contractors. GLWC does not need to be on site. The product comes with easy to follow instructions.

Please use our contact form to obtain pricing or request further details.

 

3. AHU Tube Cleaner

Use our AHU Tube Cleaner for de-scaling and de-rusting of the inside of AHU and FCU cooling coils. Benefit from this totally non-toxic system that leaves behind a corrosion-protected system with restored heat transfer efficiency.

The product is safe to touch and does not develop smoke during application as opposed to other products used for the same purpose. Gentle on people and metal but tough on dirt: It effectively cleans out the inner surfaces of the cooling coils without wearing down the installation.

AHU Tube Cleaner is a ready-to-use product. It is administered by maintenance personnel or contractors. GLWC does not need to be on site. The product comes with easy to follow instructions.

Please use our contact form to obtain pricing or request further details.

 

Clean CT-01™ Chilled Water Services

 

1. Chilled Water Loop Rehabilitation

Lean on our expertise to clean out neglected chilled water loops. The GLWC team will use the highly effective non-toxic Clean CT-01™ products and monitor water parameters to track the cleaning progress. As with all Clean CT-01™ products and services, dirt such as rust, scale and biofilm will be removed leaving behind corrosion-protected inner pipe surfaces. This green technology uses only safe ingredients that are either approved food additives or cleaners of food-preparation surfaces.

cwsample

Photo: Chilled water samples, from left to right: before, during and after our Clean CT-01™ Rehabilitation program

The chilled water loop rehabilitation consists of the following main steps:

  1. Flush system to remove dissolved and suspended impurities
  2. Connect mobile sidestream filtration skid and start filtering out any suspended impurities still present inside the loop water
  3. Dose Clean CT-01™ non-toxic low-pH descaling agent. For certain period, maintain level of active reagents; confirm by monitoring relevant chemical concentrations. During this time, the majority of rust and scale gets removed. Monitor filters and replace when clogged

cws4

Photo: Generic filter cartridges such as the ones shown remove huge amounts of impurities throughout the process, reducing the requirement for aggressive chemical concentrations that could be damaging to the system. Photo on left shows also one clean cartridge for comparison

  1. Flush system to remove dissolved impurities
  2. Dose Clean CT-01™ Pipe Cleaner which raises the pH above 7. For certain period, maintain level of active reagents; confirm again by monitoring as before. Still remaining rust and scale gets removed, while cleaned metal surfaces are being protected with ultra-thin corrosion-inhibiting passivation layer. Monitor filters and replace when clogged.

Please use our contact form to obtain pricing or request further details.

 

2. Ongoing treatment

The Clean CT01™ Chilled Water treatment System for ongoing treatment comprises of side stream filtration, wetting agent and non-toxic food grade chemical. Where necessary, also a pre-treatment of incoming water is incorporated. The treatment system is designed to firstly commission the chilled water system by removing major impurities, protecting the wetted surfaces and stabilizing the water quality. Upon stabilization of the water quality, only routine monitoring (once every 1 to 3 months) is required. As water loss from AHU/FCU maintenance and evaporation will be replaced by fresh incoming water, annual re-commissioning is recommended to keep the water system at stable conditions for maximum protection of the system’s health. This green technology uses only safe ingredients that are either approved food additives or cleaners of food-preparation surfaces.

This service is provided by our own GLWC water treatment experts.

Note: If you are a service provider and are interested to render this service to your clients, please enquire about becoming a regional representative.

Please use our contact form to obtain pricing or request further details.

 

2.3.2a

Photo: Sidestream filtration including chemical feeder set-up for a chilled water system

2.3.2b

Photo: generic cartridge filters are used to filter impurities from the water

2.3.2c

Photo: Schematic set-up for chilled water filtration skid plus chemical (pot) feeder

 

3. One-off water system clean-up service

Our experience in cleaning pipes is relevant also for other circulating water systems, such as cooling tower (condenser) systems, boiler loops, drinking water supply pipelines and more. As with all Clean CT-01™ products and services, dirt such as rust, scale and biofilm will be removed leaving behind corrosion-protected inner loop surfaces. This green technology uses only safe ingredients that are either approved food additives or cleaners of food-preparation surfaces.

Please contact us for more information and to request a quote.