Product Features Certified to ANSI Z21.13 / CSA 4.9 Gas-fired Boiler Standard - Type 441 Stainless Steel Water Tube Heat Exchanger - ASME H stamped boiler, designed and constructed in compliance with the ASME Boiler and Pressure Vessel Code Section IVSealed cabinet High energy ...Product Features Certified to ANSI Z21.13 / CSA 4.9 Gas-fired Boiler Standard - Type 441 Stainless Steel Water Tube Heat Exchanger - ASME H stamped boiler, designed and constructed in compliance with the ASME Boiler and Pressure Vessel Code Section IVSealed cabinet High energy ignition transformer (spark ignition)Built-in water pressure bypass (guarantees minimum water flow)Low water pressure switch - Integrated ECM boiler circulator - Integrated 3-way valve (diverts between DHW & CH demands)Integrated Condensate Trap - On / Off button - Two 120 VAC outputs for external circulators (DHW/CH)DHW zone input (tank thermostat or sensor)CH zone input x 2 (ON/OFF switch or NTI Room Sensor)Wi - Fi remote connectivity embedded - Outdoor temperature sensor input (or access weather via Wi - Fi connection) Control Features Integral microprocessor safety control flame safeguard and temperature - TEST Mode for combustion setup - PURGE cycle for air purging - AUTO function (outdoor/indoor reset) resets boiler temperature depending on outdoor and/or room temperature - Adjustable reset curve (slope/parallel shift)Adjustable reset temperature boost - Summer/Winter changeover (WWSD)Integrated programmable T-stat x 2 (with optional NTI Room Sensors)Freeze protection - Factory settings restore option - Cascade up to 8 TRX-series boilers - Adjustable ignition delay timer - Manual mode operation (pump/fan/diverter)Boiler statistics - Lockout and error history - Optional 0-10V / 4-20m - A input clip-in module - Optional NTI 3-Zone Pump/Valve Controller - Optional NTI Room Sensor Specifications Minimum / Maximum Input (Btu/Hr): 9,400 / 85,000