Using a Spectrum ZX to connect to the internet. Attaching an antique door-knocker to a modern doorbell. Trying to play a gramophone record with an iPod. Combining old technology with new and expecting the two to work seamlessly together generally doesn’t produce positive results but there is a case where bringing together the classic with the contemporary can bring definite improvements in terms of higher efficiency and lower costs… read on to find out more as we get expert advice from Robert Brown, a Technical Manager with the renowned and world-recognised Bosch Commercial & Industrial Heating.
Many medium- to large-sized organisations put off upgrading their existing heating systems due to concerns about cost and disruption but these worries are groundless, according to senior employee Robert. “Carrying out work to upgrade a system needn’t be as intrusive as you might expect,” he reassures, adding that while he recognises that a single solution doesn’t exist that applies to every unique circumstance, there are still “ways and means of integrating new condensing boilers into existing systems and pipework without the risk of any contamination of the primary boiler circuit or loss of performance.”
It is now generally agreed that any modern, high-spec and high-performance condensing boiler needs to be installed as an integral part of an efficient, completely-sealed system. There are also those boilers that do not experience a major benefit by being separated from an older system where the quality of the water may not be as easy to accurately and safely control. Still other applications pose different challenges during the conversion to a sealed system from one which is open-vented - problems which may require specialist consideration include potential leaks and gaps in old fittings, plumbing and pipework as well as the possibility of problems with corrosion if old-system water freely circulates around the workings of a new condensing commercial boiler.
Adding a strainer, filter & dirt/air separator to the plate heat exchanger’s common return is recommended, protecting the unit from any unsuccessfully-flushed debris from the old system. Where a plate heat exchanger is installed, expansion vessels of an appropriate size can be chosen to accommodate water expansion of the smaller, primary circuit.
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