Description
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 IV
- Sealed 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)
- WiFi remote connectivity embedded
- Outdoor temperature sensor input (or access weather via WiFi 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 / 4-20mA input clip-in module
- Optional NTI 3-Zone Pump/Valve Controller
- Optional NTI Room Sensor
