Beyond Infinity To Low-NOx

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09 April 2019 | Updated 12 April 2019

Rinnai, the manufacturers of the ErP A-rated Infinity range of continuous flow condensing gas fired water heaters, has delivered their most energy efficient range of low-NOx hot water heating units.

The company’s low-NOx Infinity HDC 1600e external wall mounted unit (together with the interior HDC 1600i version) utilises Rinnai’s patented pre-mix burner technology with a 14-1 turn down ratio – the largest on the market – of 58.4kw-4.05kw.

Integral controls on the units enable the water heater to achieve high efficiencies whether locally or integrated into a building management system. In reducing Legionella proliferation, Rinnai has developed additional ‘SMART’ controls for the secondary return DHW systems in the form of an advanced temperature control system which allows for safe running of water at 42°C core temperature during the day and 60°C when a building is closed. By the time the building reopens, core temperature is 42°C for safe use.

Lime scale

Another Rinnai innovation addresses an age-old industry problem with hot water delivery - lime scale build-up. The company’s integrated scale control system comes in the form of an LC (lime check) code on the display of the controller.

The system helps to ensure the performance and efficiency of Rinnai’s 1600 and, all of the company's continuous flow water heaters. Almost all water-fed appliances, including plate heat exchangers, boilers and water heaters will, over time accumulate scale deposits in hard water areas.

Ultimately, ongoing use with hard water may shorten the lifespan of conventional water heating appliances and systems. To safeguard against this Rinnai units continually self-monitor for lime scale deposits around the heat exchanger. If a lime scale build-up is identified, a message is sent to the built-in interface panel on the front of the appliance. The message is displayed as ‘LC’, which alerts the end user  to contact a Rinnai service agent to perform a lime scale flush to clear the potentially harmful deposits.

Picture: In reducing Legionella proliferation, Rinnai has developed additional ‘SMART’ controls.                       

Article written by Brian Shillibeer | Published 09 April 2019

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