Gas boiler ALKON 140 EXT

for heating onlyresidentialcommercial

Condensing modular boiler, both for indoor and outdoor installation IP X5D, with double premix Low NOx burner and double heat exchanger in Al/Si/Mg alloy, also for installation in battery Operation logic based on the power repartition on 2 modules, up to the minimum possible load (10.5+10.5 kW) for the obtainment of the maximum efficiency. Below a heat request of 21 kW one module is turned off and the second one modulates from 21 kW down to 10,5 kW. Output 10.5 to 136 kW and modulation ratio of 1:13 Two safety gas valve with constant air-gas ratio Two high head fans with electronic speed control Burner radiating flame surface in “metallic sponge”. Siphon on the condensates drain Electrical predisposition for connection of additional safety devices Predisposition for control with 0-10 Volt signal through BCM Complete diagnostics of the functions with signaling of the possible blocks Sliding temperature operation NTC sensors for the control of flow and return temperature Electronic ignition Multilevel programming, visualization of parameters on LCD and e-Bus communication (HSCP) Two high efficiency modulating pumps (one for each module) with antifreeze, pump antijamming and over-run functions. Minimum installation water pressure switch Optional hydraulic groups including: - Connection pipe for predisposition of additional safety devices and accessories - Differential pressure switch for water circulation control - Hydraulic separator (mixing header) Panel board (standard supplied) Thermo-regulation HSCP (Master), water pressure gauge and system “On/Off” switch It is possible the control of up to a maximum of 12 completely