Gas boiler OSA K

for heating onlywall-mountedresidential

Stylish, wall hung, low NOx, condensing, room sealed, gas boiler with electronic ignition and continuous modulation, with DHW production. Exchanger/Condenser in Alluminium/Silicon/Magnesium Ignition and electronic flame control through single electrode Modulation ratio1:8 Total premix burner, with constant combustion ratio, completely electronic (both, gas valve and modulating fan) Automatic Feed-back of the combustion through the electrode (that monitors constantly the quality of the combustion) Adjustment of output according to heating request HWS “Hot Water Speed”: commutation from heating to DHW mode without stopping the pump 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 Management of 2 zones: high / low temperature, with differentiated priority Electronic antifreeze function from 5°C Pump over-run function Safety limit thermostat Temperature sensors in flow and return DHW temperature sensor High efficiency pump, complying with the Erp Directive 2015, modulating according to the output request, managed by the on board electronics Expansion vessel (10 liters) Automatic airvent Minimum pressure switch against the lack of water Pressure safety valve set at 3 bar Disappearing U/FLY Touch panel board, with outer and room temperature sensors Gateway for Modem connection and remote programming through smartphone, with a dedicated App Connection for diagnostics and programming through computer or portable programmer.