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Home > Declogging of a closed network (at a shopping mall)
Ile-de-France Region, France

Declogging of a closed network (at a shopping mall)

Declogging of a closed network. In under 2 years, corrosion had progressed within the mall’s closed network until it reached the maximum limits: more than 99 ppm of iron and a safety valve that eventually gave way, requiring an urgent repair.

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Equipment Client challenge ODYSSEE’s solution Results
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Equipment

System HVAC – Dry cooler
System volume 15 m3 (3,900 gallons)
Installation Rooftop
Metals used Steel and copper
Make-up water Softened water

Client challenge

A non-compliant system can soon drift off course. Whether it is old or new, good practices must be followed, in order to protect against premature deterioration. When taking charge of a network, a complete inspection is needed, including a water analysis in conjunction with a study of the facility. This is how, in under two years, corrosion had progressed within the mall’s closed network until it reached the maximum limits: • More than 99 ppm of iron and a safety valve that eventually gave way, requiring an urgent repair.

ODYSSEE’s solution

A non-compliant system can soon drift off course. Whether it is old or new, good practices must be followed, in order to protect against premature deterioration. When taking charge of a network, a complete inspection is needed, including a water analysis in conjunction with a study of the facility. Given the situation, we brought in our service technicians, who performed emergency repairs.

Rehabilitation work

It was difficult to perform the work, due to the equipment’s rooftop installation and non-portability. However, quality service carried out in perfect collaboration with the operator allowed us to successfully unblock the network, thanks to extraordinary logistical coordination.
  • Drainage and gentle declogging, thanks to ODYTHERM IF550M
  • Post-cleaning inspection
  • Gradual injection of ODYTHERM FS510, according to a switchover protocol designed in combination with in-line ODYNET filters
We opted to definitively stop using products with a base of phosphate, an active ingredient that prevents corrosion and scaling, but also serves as a nutrient for bacteria, which are a source of corrosion.

Benefits of ODYTHERM FS510

Phosphate-free formula containing only organic active agents (film-forming amines)
  • Very stable at high temperatures
  • No risk of precipitation
  • Cleaning effect
  • Excellent protection against corrosion for all metals, including aluminum and aluminum alloy
  • Improved energy performance
  • Competitive pricing and low doses
  • Easy-to-use, thanks to the field kit
  • Biodegradable with low toxicity
Next, the network will be placed under permanent, enhanced antifreeze protection.

Results

DECLOGGING OF A CLOSED NETWORK

99% of iron oxide was eliminated

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