Kroll - Stationary units Page 18
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MOduLaTinG GaS-fired WarM air GeneraTOrS GaS nBX Modulating gas-fired warm air generators with condensing function for indoor installation. Power range from 28 to 116 kW. Operational areas • indoor installation in industrial/commercial rooms • for heating or ventilation Casing The casing is made of galvanized sheet steel panels: • Comprehensive thermal insulation to avoid heat emission and transmission losses • adjustable air flaps to direct the air flow Primary heating elements Steel welding construction with service-friendly access for inspection and maintenance works. The single components are: • Combustion chamber made of stainless steel inOX aiSi 430 • Heat exchanger made of stainless steel inOX aiSi 430 • flue gas collector made of stainless steel inOX aiSi 430 with service door Motor unit NBX30/40 • Maintenance-free motor with silent, crescentshaped fan blade • 3-stage or 5-stage adjustable motor rotation • Protection iP55, heat class f • electrically realized according to Vde Secondary heat exchanger • Heat exchanger in vertical construction made of stainless steel inOX aiSi 304 • flue gas collector made of stainless steel inOX aiSi 304 Control NBX50/60 • fully automatic control of burner ignition, flame monitoring and modulation for an optimal generation of heat Characteristics • Modulating burner • natural gas or LPG • electric ignition NBX90/120 • Modulating axial fan • degree of efficiency Hs up to 106 % The units are pre-set for operation with natural gas G20. The kit to convert the unit to propane gas G31 and butane gas G30 is included in the delivery (except units for Belgium). 18 Delivered units may differ from the picture.
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