OSA S

Wall hung, extra thin, low NOx, room sealed, condensing gas boiler with electronic ignition and continuous modulation, with DHW production. Front panel in different colours. Registered design

Output range: from 24 to 35 kW

• Thanks to U-Fly, the integral disappearing control console, connected to the room and outdoor temperature sensors, reaches, in heating mode, the seasonal efficiency class A+
• Low NOx class 6
• Heat exchanger / Condenser in aluminium /silicon / magnesium Total premix burner, with constant combustion ratio, completely electronic (both, gas valve and modulating fan)
• Ignition and electronic flame control through single electrode
• Modulation ratio 1:8
• Automatic feed-back of the combustion through the electrode (that monitors constantly the quality of the combustion)
• DHW heat exchanger in antiscaling stainless steel, with 12 plates (x 24 kW) and 14 plates (x 35 kW), with “thermal length” optimized for the condensation
• Adjustment of output according to heating request
• HWS “Hot Water Speed” electronic function: commutation from heating to DHW mode without stopping the pump
• Management of 2 zones: high / low temperature, with differentiated priority
• Clever hydraulic filling of the C.H. system (able to indicate possible leakages)
• Electronic antifreeze function from 5°C
• Multigas burner (Natural gas or LPG) with silplified commutation
• Up-gradable through type USB interface
• High efficiency pump, complying with the Erp Directive 2015, modulating according to the output request, managed by the on board electronics
• Connection for diagnostics and programming through computer or portable Programmer
• Two expansion vessels (10 liters total)
• Inspection system of the burner and heat exchanger cleaning through quick release clampings
• Standard supplied in “black” colour
• AWARDS: COMPASSO D'ORO 2018 - RED DOT AWARD 2017 - nomination a GERMAN DESIGN AWARD 2017; ADI DESIGN INDEX 2016
• Registered Design and Trade Mark