TRX Series II

The TRX Series II is a high-efficiency, wall-hung boiler equipped with an Innovative XTRATECH® stainless steel heat exchanger with large diameter tubing. Experience the future of simplicity with TRX Series II, featuring a user interface that's been reimagined for efficiency and ease of use. 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.

Main Features

Models up to 96% AFUE

Modulating Combustion up to 11:1

Wi-Fi on board for remote control and monitoring

Integrated ECM pump and DHW diverter valve on all models

Easy User Interface

Easy service access and quick component connections

Videos

Introduction to NTI's new TRX and FTVN Series II boilers

Set up Wizard Walk Through for TRX and FTVN Series II boilers

Adjusting Setting DHW and Central Heat Setpoints

Preparing User Interface for Cascade Applications

Clearing a Lockout for TRX and FTVN Series II boilers

Initial Start up for TRX and FTVN Series II boilers

How to Put a Boiler Into Test Mode

Changing Languages in the Display

Specifications

MODELTRX085TRX120TRX110CTRX150CTRX150
TRX199
TRX199C
Model Code3314216331421833142173314219331430633143073314308
UPC628233739179628233739193628233739186628233739209628233739070628233739087628233739094
Space Heating
Minimum / Maximum Input (Btu/Hr)
9,400 / 85,00013,200 / 120,00011,200 / 106,00013,200 / 120,00015,000 / 150,000NG19,700 / 197,000

LP 19,200 / 192,000
NG 19,700 / 197,000

LP 19,200 / 192,000
Domestic Hot Water
Minimum / Maximum Input (Btu/Hr)
11,200 / 114,00013,200 / 150,000
DOE AFUE (%)969595.595959595
Heating capacity7911198111139184184
Net AHRI Rating69978597121160160
DHW Flow Rating (at 77°F rise, gpm)N/AN/A2.73.5N/AN/A4.8
Installation typeIndoor, Wall Hung, Fully CondensingIndoor, Wall Hung, Fully CondensingIndoor, Wall Hung, Fully CondensingIndoor, Wall Hung, Fully CondensingIndoor, Wall Hung, Fully CondensingIndoor, Wall Hung, Fully CondensingIndoor, Wall Hung, Fully Condensing
Weight (lbs.)88.288.69192.8115130135
Gas connection3/4” Male NPT3/4” Male NPT3/4” Male NPT3/4” Male NPT3/4” Male NPT3/4” Male NPT3/4” Male NPT
CH connections1” Male Sweat with Adapter1” Male Sweat with Adapter1” Male Sweat with Adapter1” Male Sweat with Adapter1 1/4” Male NPT1 1/4” Male NPT1 1/4” Male NPT
DHW connectionsN/AN/A3/4” Male Sweat with Adapter3/4” Male Sweat with AdapterN/AN/A3/4” Male NPT
FlueCategory IV, Sealed Combustion Direct Vent, Power VentCategory IV, Sealed Combustion Direct Vent, Power VentCategory IV, Sealed Combustion Direct Vent, Power VentCategory IV, Sealed Combustion Direct Vent, Power VentCategory IV, Sealed Combustion Direct Vent, Power VentCategory IV, Sealed Combustion Direct Vent, Power VentCategory IV, Sealed Combustion Direct Vent, Power Vent
Minimum - Maximum Exhaust Vent Run2” (6 - 100 feet), 3” (6 - 150 feet)2” (6 - 100 feet), 3” (6 - 150 feet)2” (6 - 100 feet), 3” (6 - 150 feet)2” (6 - 100 feet), 3” (6 - 150 feet)2” (6 - 100 feet) / 3” (6 - 150 feet)2” (6 - 100 feet)* / 3” (6 - 150 feet)2” (6 - 100 feet)* / 3” (6 - 150 feet)
Minimum - Maximum Intake Air Pipe Run2” (0 - 100 feet), 3” (0 - 150 feet)2” (0 - 100 feet), 3” (0 - 150 feet)2” (0 - 100 feet), 3” (0 - 150 feet)2” (0 - 100 feet), 3” (0 - 150 feet)2” (0 - 100 feet) / 3” (0 - 150 feet)2” (0 - 100 feet)* / 3” (0 - 150 feet)2” (0 - 100 feet)* / 3” (0 - 150 feet)
Shipping Weight (lbs)78848384115125130
Power Supply120V, 60 Hz, less than 12A120V, 60 Hz, less than 12A120V, 60 Hz, less than 12A120V, 60 Hz, less than 12A120V, 60 Hz, less than 12A120V, 60 Hz, less than 12A120V, 60 Hz, less than 12A
*2" Terms*2" Terms

Manuals & Guides

TRX Series II Brochure

Download

TRX Series II Installation and Operation Manual TRX085/110C/120/150C

Download

TRX Series II Installation and Operation Manual TRX150/199/199C

Download

TRX Accessory Box

Download

TRX Series II TRX085/110C/120/150C Parts List

Download

TRX Series II TRX150/199/199C Spare Parts

Download

TRX Series II Submittal

Download

TRX/FTVN Cascade Instructions

Download

LP Conversion TRX085/120/110C/150C Series II

Download

LP Conversion TRX150/199/199C Series II

Download

TRX & FTVN Revit Files

Download

Important Warranty Information

Download

Water Quality Best Practices

Download

Accessories

Galvanized Floor Stands

We are pleased to announce the availability of two low cost galvanized floor stands for…

Trinity Floor Stand

Install your boiler anywhere in the room using our floor stands.

0-10V / 4-20mA Clip-In Module

A Clip-In Module is now available for the TRX, that will allow the temperature setpoint…

TRX/FTVN Low Loss Header

The LLH Kit is designed to easily connect to an NTI FTVN or TRX boiler,…

Modulating Room Sensor

Enjoy control of your comfort and boiler from the room of your choice!

Heat Exchanger Coil Cleaning Tool

The Heat Exchanger Coil Cleaning Tool is a device that helps you maintain the efficiency…

Choose the right gas boiler for you

Compare products