NTI Trinity Tft60 Installation And Operation Instructions For
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NTI Trinity Tft60 Installation And Operation Instructions For

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Trinity Tft
Model Numbers: Tft60 - 399
Version Date: 2015-06-24
INSTALLATION AND OPERATION INSTRUCTIONS FOR
TRINITY Tft BOILER

TABLE OF CONTENTS

1.0
INTRODUCTION ................................................................................................................ 3
2.0
SPECIFICATIONS .............................................................................................................. 6
3.0
BOILER LOCATION .......................................................................................................... 7
4.0
GENERAL VENTING ....................................................................................................... 10
5.0
VENT/AIR-INLET TERMINATION CLEARANCES ..................................................... 24
6.0
CONDENSATE DRAIN .................................................................................................... 26
7.0
INSTALLING GAS PIPING .............................................................................................. 28
8.0
LIGHTING THE BOILER ................................................................................................. 30
9.0
GAS VALVE AND BURNER SET-UP ............................................................................ 32
10.0 BOILER AND HEATING SYSTEM PIPING ................................................................... 35
11.0 LEAD LAG INSTRUCTIONS ........................................................................................... 46
12.0 FIELD WIRING ................................................................................................................. 49
13.0 WIRING SCHEMATICS ................................................................................................... 54
14.0 INSTALLATION CHECKLIST ........................................................................................ 56
15.0 ANNUAL MAINTENANCE AND INSPECTION ........................................................... 57
16.0 TROUBLESHOOTING ..................................................................................................... 59
17.0 PARTS LIST ...................................................................................................................... 81
HAZARD SYMBOLS AND DEFINITIONS
Danger Sign: Indicates a hazardous situation which, if not avoided, will
result in serious injury or death.
Warning Sign: Indicates a hazardous situation which, if not avoided,
could result in serious injury or death.
Caution Sign plus Safety Alert Symbol: Indicates a hazardous situation
which, if not avoided, could result in minor or moderate injury.
Caution Sign without Safety Alert Symbol: Indicates a hazardous
situation which, if not avoided, could result in property damage.
Notice Sign: Indicates a hazardous situation which, if not avoided,
could result in property damage.
unit may result in property damage, serious injury to occupants, or possibly death.
This Boiler must be installed by a licensed and trained Heating
Technician or the Warranty is Void. Failure to properly install this
H
Visit us
online
NTI # 84535

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Summary of Contents for NTI Trinity Tft60

  • Page 1: Table Of Contents

    Visit us online This Boiler must be installed by a licensed and trained Heating Technician or the Warranty is Void. Failure to properly install this unit may result in property damage, serious injury to occupants, or possibly death. NTI # 84535...
  • Page 2 │Installation and Operation Instructions Trinity Tft Series Read Before Proceeding If you do not follow these instructions exactly, a fire or explosion may result causing property damage, serious injury or death. FOR YOUR SAFETY, READ BEFORE OPERATING_ A) This boiler does not have a pilot. It is equipped with an ignition device which automatically lights the burner.

  • Page 3: Introduction

    1.0 INTRODUCTION General Installation Requirements The installation of your NTI Trinity Tft gas boiler must conform to the requirements of this manual, your local authority, and the National Fuel Gas Code ANSI Z223.1 and or CAN/CGA B149 Installation Codes. Where required by the Authority, the installation must conform to the standard for “Controls and Safety Devices for...
  • Page 4 │Installation and Operation Instructions Trinity Tft Series Failure to use the appropriate Natural to LP Conversion Kit and Orifice when operating the Trinity Tft with Propane will result in extremely dangerous burner operation leading to property damage, serious injury or death. Refer to section titled ATTENTION: LIQUEFIED PETROLEUM (LP) PROPANE for applicable conversion kit and LP orifice numbers.
  • Page 5 │ Trinity Tft Series Installation and Operation Instructions IN THE STATE OF MASSACHUSETTS ONLY (a) For all horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned and operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied: INSTALLATION OF CARBON MONOXIDE DETECTORS At the time of installation of the side wall...

  • Page 6: Specifications

    │Installation and Operation Instructions Trinity Tft Series 2.0 SPECIFICATIONS Table 2-1 Trinity Tft Specifications DESCRIPTION Tft60 Tft85 Tft110 Tft155 Tft175 Tft200 Tft250 Tft300 Tft399 CSA Input Modulation 17-60 17-85 21.6-108 31-155 31-175 31-200 31-250 79.8-299 79.8-399 [MBH] DOE Heating Capacity [MBH] Net I=B=R Rating [MBH]...

  • Page 7: Boiler Location

    │ Trinity Tft Series Installation and Operation Instructions 3.0 BOILER LOCATION In all cases, the Trinity Tft must be installed indoors in a dry location where the ambient temperature must be maintained above freezing and below 100F [38C]. All boiler components must be protected from dripping, spraying water, or rain during operation and servicing.
  • Page 8 │Installation and Operation Instructions Trinity Tft Series Table 3-1 Minimum Clearances for Installation and Service Dimensions - inches [mm] Model No. Clearances Front Sides Back Bottom Flue Pipe Minimum 24 [610] 12 [305] 4 [102] 9 [229] 1 [25] Trinity Tft Recommended 36 [914] 24 [610]...
  • Page 9 │ Trinity Tft Series Installation and Operation Instructions Figure 3-2 Wall Mounting Instructions  Failure to follow instructions may While leaving the Upper bracket (A) intact, result in fire, serious injury, or death. remove the Wall-mount bracket (B) attached to the bottom-back of the appliance. Save the This unit requires two people to lift it mounting hardware for Step 4.

  • Page 10: General Venting

    Vent and Air-inlet are to be piped separately. The Trinity Tft cannot share a common vent or air-inlet with multiple boilers; unless the common venting system has been certified by NTI (Contact NTI for details). Failure to comply will result in serious injury or death. Removing an Existing Boiler from Common Venting System Do not install the Trinity Tft into a common venting system with any other boiler.
  • Page 11 │ Trinity Tft Series Installation and Operation Instructions Direct Vent Installation When installed as a Direct Vent boiler the combustion air-inlet must also be piped directly to the outdoors using the methods described in this section and in accordance with the National Fuel Gas Code, ANSI Z223.1 (U.S.) or CSA B149.1 (Canada) and local requirements.
  • Page 12 │Installation and Operation Instructions Trinity Tft Series Mandatory Pre-commissioning Procedure for Plastic Venting (PVC or CPVC) Do not apply power to the boiler prior to Step 4 in the Mandatory Pre-commissioning Procedure for Plastic Venting. 1) Working with the power turned off to the boiler, completely install the vent and air intake system, securely cementing joints together.
  • Page 13 │ Trinity Tft Series Installation and Operation Instructions Figure 4-2(a) Trinity Tft60-110 & 300-399 Figure 4-2(b) Trinity Tft60-110 & 300-399 Near Boiler Venting (CPVC) Near Boiler Venting (PVC) Swing Joint to attain slope in Air-inlet Air-inlet horizontal runs Pipe *...
  • Page 14 │Installation and Operation Instructions Trinity Tft Series Figure 4-2(e) Trinity Tft60-110 & 300-399 Figure 4-2(f) Trinity Tft60-110 & 300-399 Near Boiler Venting (Stainless Steel) Near Boiler Venting (Polypropylene) PPS Elbow w/ offset angle to SS Air-inlet Pipe PPS Air-inlet Pipe*...
  • Page 15 │ Trinity Tft Series Installation and Operation Instructions Table 4-2 CPVC Vent Pipe Transition Piece (used when venting with PVC) Model No. Vent Pipe Size CPVC Transition Vent Pipe Length Full Insertion Depth 3” Minimum 5” [127 mm] 2-7/8” [73 mm] Tft60-110 3”...
  • Page 16 Optional Termination Kits – Direct Vent Installation Kits certified with the Trinity Tft are listed in Table 4-6 and available from IPEX, DuraVent and/or NTI. For more information on System 636 Vent Kits or wholesaler locations contact IPEX directly USA: 1-800-463-9572 │...
  • Page 17 Table 4-6 Optional Vent Termination Kits Vent Option Vent Vent Material Description Supplier P/N Figure Size Compatibility Roof Wall 2” 196984 (NTI P/N 85062) IPEX Low Profile   3” 196985 (NTI P/N 84357) 4-3(b), 4-5(c) PVC/CPVC (Flush Mount) 4” 196986 (NTI P/N 84358) 2”...
  • Page 18 │Installation and Operation Instructions Trinity Tft Series Sidewall Venting Options – Direct Vent Installation Figure 4-3(a) Figure 4-3(b) Two-pipe Termination (Sidewall) Low Profile Termination (Sidewall) Location of exhaust and air-inlet Location of exhaust and air-inlet connections vary between connections vary between models, see Figure 4-2.
  • Page 19 │ Trinity Tft Series Installation and Operation Instructions Roof Venting Options – Direct Vent Installation Figure 4-4(a) Figure 4-4(b) Two-pipe Termination (Roof) IPEX Concentric Termination (Roof) Location of exhaust and air-inlet Location of exhaust and air-inlet connections vary between connections vary between models, see Figure 4-2.
  • Page 20 │Installation and Operation Instructions Trinity Tft Series Sidewall Termination Details – Direct Vent Installation Figure 4-5(a) Figure 4-5(b) Two-Pipe Termination (Sidewall) IPEX Concentric Termination (Sidewall) Horizontal 4-12” or greater Refer to documentation included with termination kit for than 36” complete installation instructions. Exhaust Exhaust Exhaust...
  • Page 21 │ Trinity Tft Series Installation and Operation Instructions  Roof Termination Details – Direct Vent Installation Figure 4-6(a) Figure 4-6(b) Two-Pipe Termination (Roof) IPEX Concentric Termination (Roof) Exhaust Refer to documentation included with termination kit for Vent Screen complete installation instructions. Vent pipe piece to retain vent screen Vent pipe piece to...
  • Page 22 Combustion air containing chemicals such as chloride, fluoride, bromine or iodine or dust and debris will cause corrosion damage of the heat exchanger voiding your NTI warranty. Refer to Table 4- 1 for a list of corrosive products and contaminants sources to avoid.
  • Page 23 │ Trinity Tft Series Installation and Operation Instructions Figure 4-7 Venting Below Grade For installations that exit the wall below grade: Supports every 1. Excavate site to a point below where the pipes 24” [610 mm] are to exit as shown. 2.

  • Page 24: Vent/Air-Inlet Termination Clearances

    │Installation and Operation Instructions Trinity Tft Series 5.0 VENT/AIR-INLET TERMINATION CLEARANCES The quick reference table below is to be read in conjunction with the numbered notes as indicated, Figures 5-1 and 5-2, and the Venting Rules and Guidelines in Section 4.0. The instructions detailed in this section are a combination of Trinity Tft specific and National Gas Code restrictions.
  • Page 25 │ Trinity Tft Series Installation and Operation Instructions Figure 5-1 Termination Clearance Quick Reference Diagram (See Table 5-1) Illustrations of Termination Clearances Figure 5-2 Sidewall Termination (See Table 5-1) Clearances “F” and “G” Canada – Minimum 3 ft. [915 mm] The US –...

  • Page 26: Condensate Drain

    │Installation and Operation Instructions Trinity Tft Series 6.0 CONDENSATE DRAIN This unit produces liquid condensate in the heat exchanger and venting system as a product of combustion. Steps must be taken to ensure condensate does not collect in the venting system; therefore, all exhaust piping must slope back to the boiler a minimum 1/4”...
  • Page 27 │ Trinity Tft Series Installation and Operation Instructions Figure 6-1 Condensate Drain Piping  Inspect Condensate Trap assembly Boiler Condensate Drain Gear Clamp (factory supplied) Condensate Trap (factory supplied)  Attach to Boiler Condensate Drain Tighten gear clamps and pull down on Condensate Trap to test secureness ...

  • Page 28: Installing Gas Piping

    Ensure that:  The gas line connection to the boiler does not apply any weight to the gas valve. NTI recommends using approved flexible gas piping (if acceptable by local codes) to connect the boiler to the gas supply (See Figure 7-1 for details).
  • Page 29 │ Trinity Tft Series Installation and Operation Instructions Figure 7-1 Gas Line Connection (Typical) Manual Gas Shutoff Valve Should overheating occur or the gas supply fail to shutoff, close the Manual Gas Shutoff Valve to the boiler. Union Flexible Gas Line Piping Recommended to eliminate strain on the boiler gas components (only use if...

  • Page 30: Lighting The Boiler

    │Installation and Operation Instructions Trinity Tft Series 8.0 LIGHTING THE BOILER Before Start-up refer to Mandatory Pre-commissioning Procedure for Plastic Venting in Section 4.0. Failure to follow these instructions can result in explosions, injury or death. Prior to turning the gas supply on and lighting the boiler, ensure all aspects of the installation are complete and in conformance with the instructions provided in this manual, including the Vent/Air-Inlet, Condensate Drain, and System Water Piping.
  • Page 31 EXTREME ELECTRICAL SHOCK possibly causing serious injury or death. If the unit fails to light consistently and smoothly, contact NTI for technical assistance at 1-800-688-2575. Never allow the boiler to operate if the ignition or operation of the burner is rough or erratic.

  • Page 32: Gas Valve And Burner Set-Up

    │Installation and Operation Instructions Trinity Tft Series 9.0 GAS VALVE AND BURNER SET-UP Set-up of the Trinity Tft gas valve must be performed by a licensed Gas Technician. Failure to perform the set-up correctly may result in incorrect operation, component failure, property damage, serious injury or death.
  • Page 33 4. Operate the unit at the minimum modulation rate (Table 9-2). Ensure the combustion remains smooth and and CO remain within the limits (Table 9-1). If not, do not adjust further, contact NTI for assistance. Flue Gas Analysis and Adjustment Each Trinity Tft is factory set to operate with Natural Gas, for boilers field converted to operate with Propane Gas, a flue gas analysis and adjustment is mandatory.
  • Page 34 │Installation and Operation Instructions Trinity Tft Series Figure 9-1 Tft60-250 Gas Valve and Venturi Assembly (model Tft60-110 shown) Gas Valve DO NOT Remove Manifold Pressure Line Pressure Test Port Test Port Throttle / Input Adjustment Screw Venturi Figure 9-2 Tft300-399 Gas Valve and Venturi Assembly Manifold Pressure Throttle / Input Test Port...

  • Page 35: Boiler And Heating System Piping

    For retrofits, all system piping, including radiators, must be cleansed of build-up including sludge and scale. All systems, old and new, must be cleansed to remove flux, grease and carbon residue; NTI recommends cleaning the boiler system with “Fernox F3 Cleaner”. For retrofit applications with heavy limescale and sludge deposits, a heavier duty cleaner may be required;...
  • Page 36 WATER” LED should illuminate. Generate a burner demand; the burner should not fire and “Lockout 67 ILK OFF” should appear on the screen. Contact NTI for assistance if this does not happen. 2. Fill the boiler with water; the “LOW WATER” LED should turn off. Clear the Lockout from the display board;...
  • Page 37 │ Trinity Tft Series Installation and Operation Instructions Near Boiler Piping (Tft60-110) Figure 10-1(a) Figure 10-1(b) Supply/Return Bottom (Tft60-110) Supply/Return Top (Tft60-110) Auto Air-Vent Auto Air-Vent Inlet Pressure Relief Valve Pressure Relief Valve Outlet Pressure Gauge Pressure Gauge Outlet Inlet Pressure Relief Pressure Relief Valve (alternate...
  • Page 38 │Installation and Operation Instructions Trinity Tft Series Near Boiler Piping (Tft155-250) Figure 10-2(a) Figure 10-2(b) Supply/Return Bottom (Tft155-250) Supply/Return Top (Tft155-250) Auto Air-Vent Inlet Auto Air-Vent Pressure Relief Pressure Relief Valve Valve Pressure Gauge Outlet Pressure Relief Valve (alternate location) Pressure Gauge Pressure Relief Valve (alternate...
  • Page 39 │ Trinity Tft Series Installation and Operation Instructions Near Boiler Piping (Tft300-399) Figure 10-3(a) Figure 10-3(b) Supply/Return Bottom (Tft300-399) Supply/Return Top (Tft300-399) Auto Air-Vent Auto Air-Vent Inlet Pressure Relief Valve Pressure Relief Pressure Gauge Valve Outlet Inlet Pressure Relief Valve (alternate Outlet location) Pressure Gauge...
  • Page 40 (See Table 10-2 for minimum flow rate requirements). To ensure the minimum flow rate is attained, NTI strongly recommends installing the boiler in a “Primary/Secondary” plumbing configuration utilizing “Closely Spaced Tees” or a “Low Loss Header” to de-couple the Boiler-Primary loop from the System-Secondary loop(s).
  • Page 41 │ Trinity Tft Series Installation and Operation Instructions Table 10-4 Circulator and Pipe Size Requirements Minimum Primary Loop Pump Size Temp. Boiler Flow Boiler Head Minimum Model Rise (ºF) Rate (GPM) Loss (ft) Pipe Size B&G Grundfos Taco Armstrong 1” NRF-22 UPS15-58 (2) Astro 30 (2)
  • Page 42 │Installation and Operation Instructions Trinity Tft Series Figure 10-4(a) Tft60-110 Head Loss Curve Flow Rate (US gpm) Figure 10-4(b) Tft155-250 Head Loss Curve Flow Rate (US gpm) Figure 10-4(c) Tft300-399 Head Loss Curve Flow Rate (US gpm)
  • Page 43 │ Trinity Tft Series Installation and Operation Instructions Air Removal – The boiler and system plumbing layout must be configured to promote the removal of air from the water. Air vents and bleeders must be strategically placed throughout the system to aid in purging the air from the system during commissioning of the boiler.
  • Page 44 │Installation and Operation Instructions Trinity Tft Series Figure 10-5 Primary/Secondary Plumbing (Single System Circulator Configuration) Water connection locations will vary between boiler models; refer to Figures 10-1 to 10-3.
  • Page 45 │ Trinity Tft Series Installation and Operation Instructions Figure 10-6 Primary/Secondary Plumbing (Multiple System Circulator Configuration) Water connection locations will vary between boiler models; refer to Figures 10-1 to 10-3.

  • Page 46: Lead Lag Instructions

    │Installation and Operation Instructions Trinity Tft Series 11.0 LEAD LAG INSTRUCTIONS Multiple Boiler Applications The Tft controller has the internal capacity to stage or Lead-Lag up to 8 boilers configured in a cascade. This Lead-Lag capability allows a designated “Master” boiler to communicate with and effectively control each boiler in a multiple boiler system.
  • Page 47 Field Wiring Table 12-2a and Figure 12-2. System Sensor (Optional) – install a system sensor (NTI P/N: 84010) on the outlet (supply) pipe feeding the heating system, see Figure 11-1. Wire the system sensor to SENSOR COM and SYSTEM of the Master Boiler;...
  • Page 48 │Installation and Operation Instructions Trinity Tft Series Lead Lag Instructions – Central Heating Central Heat Demand Switch (Room Thermostat) – connect to R (24VAC) and CH2 (LL) of the Master Boiler; see Field Wiring Table 12-2b and Figure 12-2. Switch must be an isolated end switch (dry contact). Central Heat Setpoint –...

  • Page 49: Field Wiring

    │ Trinity Tft Series Installation and Operation Instructions 12.0 FIELD WIRING All wiring must be in accordance with the Canadian Electrical code, CSA C22.2 and any applicable local codes. Ensure that the wiring complies with this manual. The boiler must be electrically grounded in accordance with the National Electrical Code ANSI/NFPA 70, local codes, and/or the Canadian Electrical Code CSA C22.1.
  • Page 50 │Installation and Operation Instructions Trinity Tft Series Figure 12-1 Line Voltage Field Wiring Table 12-1 Line Voltage Field Connections Connection Location Description Location for connecting line voltage of the power supply. Note; most installation codes (120VAC) require the installation of a service switch to break line voltage to the appliance. PUMP A 120VAC output to the DHW circulator;...
  • Page 51 Sensor Common – Common port for field inputs SYSTEM, OUTDOOR and DHW. System Water Temperature – An optional strap-on System Sensor is available from NTI (P/N 84010). When connected to terminals 6 and 7, the control will indicate a “CH” SYSTEM or “Lead-Lag”...
  • Page 52 │Installation and Operation Instructions Trinity Tft Series Low Voltage Terminals – “R” terminals 2 and 3 of the 24VAC I/O barrier has 24VAC potential from the internal transformer. Do not connect power from this terminal to any other terminal other than terminals 4, 5 and 6 (LIM, CH1 and CH2 (LL)). Failure to follow these instructions may damage the unit.
  • Page 53 │ Trinity Tft Series Installation and Operation Instructions Modbus Communication Connections The Trinity Tft uses Modbus for communicating data to and from the boiler controller. Effectively the boiler incorporates three (3) Modbus communication ports: 1. Controller MB1 to Display COM1 – provides communication of all data between the boiler controller and the user interface (touch-screen display).

  • Page 54: Wiring Schematics

    │Installation and Operation Instructions Trinity Tft Series 13.0 WIRING SCHEMATICS Figure 13-1 Tft Connection Diagram...
  • Page 55 │ Trinity Tft Series Installation and Operation Instructions Figure 13-2 Tft Ladder/Logic Diagram...

  • Page 56: Installation Checklist

    │Installation and Operation Instructions Trinity Tft Series 14.0 INSTALLATION CHECKLIST Installation  1. If operating on Propane Gas, convert boiler using appropriate Kit number. See Table 7-1.  2. Locate the boiler in accordance with Section 3.0 of this manual. ...

This manual is also suitable for:

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