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• The demand for having the most efficient circulation systems is steadily increasing and at Grundfos we are always striving to provide products and solutions that exceed our customers’ expectations. Grundfos’ advanced technological pumping systems and solutions reduce energy consumption and at the same time provide businesses with real economic savings and CO2 reductions. Grundfos’ new pressurisation and separation equipment provides solutions to improve the overall performance and efficiency of heating and cooling installations. The key benefits of these products are to ensure that the fluid in the system is free from air and debris and that pressure is maintained, ensuring that the system runs at maximum efficiency. Our equipment improves reliability, saves energy, reduces maintenance costs and extends the life of the system. Reasons for Pressurisation There are a number of advantages of using a more modern closed heating/chilling system as opposed to a traditional open system with a feed and expansion tank. The water used in sealed systems is constantly being reused, as a result the dissolved air is taken care of and exposed steel in traditional vessels is not subject to continued corrosion. Closed systems also do not require heavy roof top tanks and the associated pipework; therefore water loss due to evaporation is greatly reduced. Closed systems reduce installation cost. Their higher flow temperatures and greater temperature drops reduce the systems water circulation needs, enabling a smaller pump and pipes to be used. This combined with replacing the conventional header tank, associated pipework and lagging, leads to considerable savings. Range Structure The Grundfos pressure top-up and degassing portfolio consists of three ranges, each with a choice of formats and pump number and available to match a variety of fill pressures. The Grundfos Product Portfolio PHT – Pressure Holding Top-up Range With a combination of reliable pumps, advanced control and a choice of external communication protocols, the new PHT range of pressurisation units from Grundfos delivers peace of mind, energy efficiency and maximum system availability. Part of the extensive portfolio of packaged pumps sets available from Grundfos, these intelligent systems are suitable for use in a wide range of residential, commercial and industrial applications. They are available in 5 series: ? The PHT N-Series is narrow format wall mounted unit for low flow (

• ? integral 60 litre break tank as standard ? twin solenoid controlled inlets ? high level control float switch ? low level control float switch ? WRAS certified components ? compact size ? available as fixed and variable speed options ? single and twin pump variants available ? break tank complete with Category 5 A/B air gap ? IE3 motors (or better) Benefits: ? low energy consumption, reduced running costs ? easy to install and operate ? plug ‘n pump design ? minimum maintenance required ? reliable Grundfos pumps fitted as standard ? automatically adapts to system demands (E version) ? twin solenoid valve ensures stable water supply to the system ? field bus connectivity with E version Modbus, Profibus, LON ? fully compatible with Grundfos GO Remote (GTI E version) for enhanced communications and system management
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