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Rinnai creates system efficiency solution for longer life

13 April 2017

Limescale can be a major contributor to a loss of efficiencies for water heating systems of any type, so leading continuous flow water heater manufacturer Rinnai has taken steps to maintain superior efficiencies throughout the life of the system by incorporating a proven limescale inhibitor that will significantly reduce the impact of limescale, thereby maximising efficiency over the product’s lifetime.

Rinnai has teamed up with electrolytic in line inhibitors, pioneers in limescale inhibitor technology, to maximise system efficiency on its range of A rated commercial water heaters.

This electrolytic scale inhibitor kit is for commercial hot water systems. Independently tested, it is a low-maintenance way to protect against the damaging and expensive impact of limescale on hot water systems.

Not only does it offer long lasting protection against the formation of hard limescale it also ensures bacteria has fewer places to hide as a result of cleaner surfaces, so in a secondary return DHW system the problem of Legionella is also heavily reduced.

The independently tested and proven technology protects capital investment and occupier health.

The electrolytic zinc anode technology used in this solution is mentioned in the Part L Building Services Compliance Guide, whereas “external to pipe” water conditioning techniques are not.

The system’s low level zinc additions change the water chemistry to inhibit the formation of limescale by transforming calcite in such a way that they do not stick to the interior of the unit or pipework.

The system delivers value engineering as it does not decay after dosing and its effectiveness is not impacted by water storage or agitation caused by passing through a booster set.

Rinnai has recently supplied its system efficiency systems for London-based SGA Consulting, a specialist in low energy buildings, after liaising with the practice’s mechanical engineer Vivek Devan on two restaurant projects.

Devan says “The Rinnai units are compact and their smaller footprint both physically and environmentally made them a good choice here. The scale inhibitor technology was also a factor.”

Devan spoke with Rinnai technical experts before specifying the units and heard that Rinnai is actively promoting and selling scale inhibitor solutions following the successful results obtained from various trial sites.

The electrolytic unit may be installed in the rising main, before the water heater and booster set.

Capex cost savings are probable because the rising main pipe size is often a smaller diameter than the hot and cold water distribution pipe sizes.

Therefore, just one inhibitor system will treat the whole location, also offering an attractive value engineering opportunity.

The inhibitor is widely specified and installed in a range of sectors such as manufacturing, hotels, retail and supermarkets, healthcare and education as well as public authorities.

For buildings using BMS systems, a Pulse Splitter is an option that provides water flow rate or water usage data directly to the BMS from the water meter in the system.

The inclusion of the electrolytic system in Rinnai’s A-rated continuous flow water heating systems delivers peace of mind to installers and end users as performance is maintained throughout the lifetime of the appliances.

The scale protection units are available in a variety of pipe sizes – large 67,76 and 108mm; medium 28,35,42 and 54mm; and small 22mm.


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