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NTI TRX II Series Installation Quick Manual

Residential condensing gas boiler
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Installation
Quick Guide
TRX085
TRX120
TRX110C
TRX150C models
IMPORTANT
BEFORE YOU INSTALL THE BOILER.
This boiler is configured for Natural Gas from the factory.
If conversion to Propane Gas is required, the conversion kit supplied with the boiler
must be used.
This guide is designed to provide a quick overview to the qualified installer, service
agency, or the gas supplier for installing the boiler models indicated above.
IT IS NOT A SUBSTITUTE FOR THE INSTALLATION START UP MAINTENANCE MANAUL
SUPPLIED WITH THE BOILER.
The Installation Start Up Maintenance manual for each product contains the
necessary safety and national/local code requirements which, if not followed
exactly, may lead to property damages, personal injuries and/or loss of life.
NTI assumes no responsibility for damage(s) of any kind caused by inappropriate
use of this guide and/or failure to read all technical literature provided.
EN - Installation Quick Guide
STEP 1
TRX
TRX
Residential Condensing Gas Boiler
Before Installing
Series ii
Series ii
1

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Summary of Contents for NTI TRX II Series

  • Page 1 NTI assumes no responsibility for damage(s) of any kind caused by inappropriate use of this guide and/or failure to read all technical literature provided.
  • Page 2 User’s Information Manuals before SA VE TH IM PO RT ES E IN ST A N T wi th th service technician. NTI is not liable for RU CT IO e cu sto NS : Ins ins pe cti m er as...
  • Page 3 Ga s Bo NTI, provi Excha nger lation date cond itions the follow ting in first 10 by a quali years , NTI iler ded this that NTI IN ST AL TR X1 20 ensur ing ) may requi norm al ing table fied instal...
  • Page 4 STEP 2 Installing Location Requirements Install the boiler in an area that allows for service and maintenance access to utility connections, hydronic and gas piping, intake and exhaust piping, filters, and traps. Ensure the following clearances are maintained when choosing an installation location.
  • Page 5 Natural Gas. AIR COMBURANT (Categorie IV) as e. ns um e co el be NTI Boilers Inc. 30 Stonegate Dr., Saint John, NB, E2H 0A4, Canada thi s ov al Model Fuel Input, MBH [Entrée, kW] Heating Capacity, MBH...
  • Page 6 STEP 2 Installing Preparing for Exhaust Vent and Intake Air Piping EXHAUST VENT Clean and dry the boiler connection. DO NOT use primer or cement on the boiler connection. When preparing pipe for installation: Ensure cuts are square. Bevel cut edges by 1/16” - 1/8”. Deburr the pipe.
  • Page 7 STEP 2 Installing Venting Friction Loss Equivalent in Piping and Fittings 2” or 3” Venting Equivalent Feet Fittings or Piping 2” or 3” 90 Degree Elbow* 5’ 45 Degree Elbow 3’ Coupling 0’ One Foot of Straight Pipe 1’ Concentric Kit 3’...
  • Page 8 STEP 2 Installing Vent Termination Options Concentric Vent Roof Vent Termination Maintain 12” min. clearance above grade or snow level Combustion Air Combustion Air Vent Concentric Vent Sidewall Termination Combustion Air Combustion Air Vent Vent 1 in min. (a) Maintain 12” min. clearance above grade or snow level 420019002000 - Rev.
  • Page 9 STEP 2 Installing Intake Two-pipe Sidewall Termination Exhaust 4 in min. Exhaust Intake Interior View Exterior View Two-pipe Roof Termination 4 in min. Exhaust Exhaust Intake Intake * Maintain 12” min. clearance from any obstruction and above highest anticipated snow level EN - Installation Quick Guide...
  • Page 10 STEP 2 Installing Intake Air and Exhaust Vent Materials CAUTION This boiler is certified as a “Category IV” appliance and requires a special venting system. The vent system will operate with a positive pressure in the pipe. Exhaust gases must be piped directly outdoors using the vent materials and rules outlined in the installation manual.
  • Page 11 TRX085 & TRX120 - The boiler may be connected to an indirect water heater to supply domestic hot water. NTI offers indirect water heaters in a wide range of gallon sizes in stainless steel construction. The water connections must be installed in accordance with all local and National plumbing codes, or any applicable standard which prevails.
  • Page 12 STEP 2 Installing ADAPTER INSTALLATION TRX085 - TRX120 TRX110C - TRX150C (with Indirect Water Heater) * see note below * see note below A. CH Supply 1” A. CH Supply 1” B. Return from Indirect Water B. DHW Outlet 3/4" Heater 3/4"...
  • Page 13 STEP 2 Installing CH PRESSURE RELIEF VALVE This boiler is provided with a CH pressure relief valve that complies with the ANSI/ ASME Boiler and Pressure Vessel Code, Section IV (Heating Boilers). Pressure The included 30 psi CH Pressure Relief Relief Valve Valve must be installed at the top of the boiler, using the included pipe adapter and...
  • Page 14 STEP 2 Installing Connecting the Condensate Drain This boiler is shipped from the factory with a pre-installed condensate trap and a separate drain hose. The supplied drain hose must be connected before routing the condensate to one of the following disposal options: a.
  • Page 15 STEP 2 Installing Gas Connection It is recommended that this boiler be connected as the first appliance downstream of the gas meter to ensure a sufficient gas supply. To connect the gas supply: 1. The gas connection fitting on the boiler when the supplied adapter is installed is ¾”...
  • Page 16 STEP 2 Installing Wiring *WARNING: Install wiring and electrically ground boiler in accordance with the authority having jurisdiction or, in the absence of such an authority, follow the National Electrical Code, NFPA 70, and/or CSA C22.1 Electrical Code- Part 1 in Canada. Failure to follow all applicable local, State, and National regulations, mandates, and building supply codes could result in property damage, serious personal injury, or death.
  • Page 17 STEP 2 Installing 1. Connecting Power for DHW & CH Pumps (120V) and Zone Outputs (dry contact) To connect power for the CH and DHW external pumps and zone loads (pumps or valves) at the boiler junction box: Shut off the power supply at the boiler and at the circuit breaker. Shut off...
  • Page 18 STEP 2 Installing User Interface Single Boiler 10/20/2023 20:35 17 psi 66°F Status Outlet: Power: 100 % 158 °F 10/20/2023 20:35 Single Boiler 17 psi 66°F Demand Status Outlet: Power: F.Signal 125 Target 180° Central Heating 158 °F Demand Outdoor Reset Target 180°F Central Heating F.Signal 125...
  • Page 20 NTI Boilers Inc. 30 Stonegate Drive Saint John, NB E2H 0A4 Canada Technical Assistance: 1-800-688-2575 Website: www.ntiboilers.com Fax: 1-506-432-1135 Visit us online 420019002000 - Rev.06 - 1 10324...

This manual is also suitable for:

Trx085Trx120Trx110cTrx150c