Kroll - Stationary units Page 47
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PRE-ANNOUNCEMENT NEW STaTiOnary WarM air GeneraTOrS S-PreMiuM Basically, all applications stay the same with the new premium S heaters type SP, compared to the previous models, but with the important advantages of a considerable raise in energy efficiency, operational comfort and a flexible adaptation with intelligent, permanently controlled duct systems. The same applies to the flexible installation as horizontal or vertical unit and to the corresponding accessories, such as air flaps and pocket air filters. • Operation completely in condensing mode • degree of efficiency 106% (hs) 25S to 110S • Saving of combustible up to 20 % • energy-efficient eC-fans (erP2020) • already today complying with the eu regulation for 2021 • full-touch control • flue gas temperatures up to maximum 90°C • Larger heat exchanger surface • Combustion chamber and heat exchanger made of high-quality 1.512 stainless steel with approx. 15 % of chrome in order to avoid corrosion by flue gas condensate. further Characteristics • as standard, 2-stage burners are used in order to improve the condensing function and the energy saving • Continuously operated eC fan for a flexible adaptation of the desired air delivery flow in a duct system by a gliding range of pressure from 100 to 300 Pa • no rigid dimensioning to one single working point • Permanent changes of the duct system such as the position of flaps and the resulting pressure losses are detected by the heater itself by differential pressure measurements inside and are adapted by the automatic control to the desired air flow via the stepless rev control of the eC fan • all previously shown advantages of the new full-touch control plus the new functions of the eC fans are: – Control of 2-stage burners – Keeping the air flow constant by differential pressure sensor – Start-up function for quick heating up Delivered units may differ from the picture. 47
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