Extra-thin wall hung, room sealed, Low NOx, condensing gas boiler, with DHW production, for indoor / outdoor installation (IPX5D), with total premix burner and continuous modulation with electronic ignition
Outer casing completely in stainless steel AISI 304
Exchanger / Condenser in aluminum / silicon / magnesium
Ignition and flame electronic control through single electrode
Modulation ratio 1:8
Total premix burner with constant combustion ratio, completely electronic (both gas valve and modulating fan)
Outer casing completely in stainless steel AISI 304
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
Clever hydraulic filling of the C.H. system (able to indicate possible leakages)
Electronic antifreeze function from 5°C
Pump over-run function
Safety limit thermostat
Flow temperature sensor
Return temperature sensor
DHW temperature sensor
High efficiency pump, complying with the Erp Directive 2015, modulating according to the output request, managed by the on board electronics
Two expansion vessels (10 liters total)
Automatic airvent
Minimum pressure switch against the lack of water
Pressure safety valve set at 3 bar
Remote OT+ panel board with external and room temperature sensors