Adversing: 01622 699116 Editorial: 01354 461430 Pressure management


The system must be able to handle the higher levels of water pressure that it will be subjected to if it is supplying hot water to a building’s upper floors from the basement or lower floors. The water heater and its components – in particular the tank or cylinder – must be able to withstand the inlet water pressure required to deliver hot water safely to multiple storeys, especially in period buildings.


In unvented systems, there are safety measures that limit the pressure and temperature of the cylinder. The danger is that because the boiling point of water under pressure increases, if the thermostat fails to correctly control the water temperature within the water heater a rupture could result in the hot water flashing to steam.


Maintenance maers


It is essential to put in place procedures that protect the water heater in order to gain the maximum benefit throughout the life cycle of the product. For example, limescale deposits can build up which coat the heat exchanger and other system components, resulting in reduced operating efficiencies, blockages and potential equipment failure.


The first line of defence against limescale is to prevent its build-up in the first place, and Andrews Water Heaters recommends treating system water when its hardness reaches 150 parts per million, or 7-10 by the Clark Degrees scale. Various water treatment options are available, such as water softeners and electrolytic scale inhibitors that prevent build-up of limescale and keep the system flowing in peak condition. As wellness tourism continues to grow, so will the need for hotels to re-think their water heating provision.


www.andrewswaterheaters.co.uk


airlawns Hotel & Spa in Aldridge has 60 en-suite bedrooms, extensive spa facilities and an award-winning restaurant. With many of its services dependent on hot water, hotel manager John Pette Jnr knew it was time to upgrade their increasingly inefficient system to reduce energy costs and future-proof operations for years to come. Knowing that the hotel already had four other Andrews Water Heaters units which were reliably serving the hotel’s conference and spa facilities, contractor Martin Gray at D&K Heating Services recommended three MAXXflo units to replace the old boilers. Martin said: “I recommended the MAXXflos because these heaters have three burners, providing the reassurance that if one of the burners failed, the others would provide temporary back up so that the kitchens and guest rooms would not have to go without hot water.”


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Since the units were installed, the hotel has not only seen a significant drop in gas consumption, but also found it easier to maintain maximum water hygiene. Neville Radford, Area Sales Manager at Andrews Water Heaters, explains: “In the old system, water was stored in a large feed tank. This meant that it had to be regularly chlorinated and tested to reduce the risk


uSince the MAXXflo units were installed, the hotel has not only seen a significant drop in gas consumpon, but also found it easier to maintain maximum water hygiene.


HOTEL & LEISURE BSEE Maximum flow for Midlands spa hotel


uFairlawns Hotel & Spa in Aldridge chose three MAXXflo units to replace the old boilers.


of Legionella. Because MAXXflo water heaters are direct-fired units, the hotel no longer needs a big water tank, making maintenance easier and reducing the amount of space taken up by water heating equipment.”


Finally, the MAXXflos are also saving time and money when it comes to maintaining other aspects of the system. Previously, additional booster pumps in the building were vital to deliver the hot water to where it was needed. Thanks to the new pressurised system, hot water can reach the guest rooms and kitchen quicker and guests aren’t disturbed by noise from the booster pumps.


VISIT OUR WEBSITE: www.bsee.co.uk


BUILDING SERVICES & ENVIRONMENTAL ENGINEER AUGUST 2018 23


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