Description
The TRX is a high-efficiency, wall-hung boiler equipped with an Innovative XTRATECH® stainless steel heat exchanger with large diameter tubing. Every unit is equipped with embedded Wi-Fi connectivity so that the TRX control can easily communicate with NTI remote connectivity tools, making servicing easier. All internal components utilize bayonet quick connectors, eliminating the need to braze or solder within the unit. Swing down control box greatly enhances serviceability, making all major components easily accessible
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
• Maximum operating pressure 50 psi (CH circuit)
• Maximum operating pressure 150 psi (DHW circuit)
• Wall mounted
• Zero clearance to combustibles (clearances required for
service)
• Modulating burner, 10:1 turndown ratio
• Certified as Direct Vent (sealed combustion) or for use with
indoor combustion air
• 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
• 120 VAC output for external CH circulator
• Built-in DHW flow sensor, w/serviceable filter
• Built-in DHW brazed plate heat exchanger
• 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
• Selectable DHW Preheat feature
• Adjustable post purge timer
• 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
Specifications
Installation: Indoor, Wall Hung, Fully Condensing
Type: Combi
Input Heating (Btu/Hr): 19,700 / 197,000
Input (DHW Combi): 19,700 / 197,000
AFUE: 95%
Heating Capacity, (MBH): 184
Net AHRI Rating, Water (MBH): 160
Gas Supply Pressure: 3.5” to 10.5” WC
- 35F Rise: 10.5
DHW Flow - 45F Rise: 8.2
- 77F Rise: 4.8
Boiler Water Content (Gal): 2.7
Ignition System: Direct Electronic Spark Ignition / Flame Rectification
Burner System: Premixed Fuel Modulation / Stainless Steel Burner
Gas Valve System: Air Ratio Valve
Gas Connection, NPT: ¾” (Male)
(PSI) Heat Exchanger MAWP: 50
(PSI) Pressure Relief Valve: 30
(PSI) DHW Max Pressure: 150
