NTI Tft60 - 399 Installation And Operation Instructions Manual
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NTI Tft60 - 399 Installation And Operation Instructions Manual

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Trinity Tft
Model Numbers: Tft60 - 399
Version Date: 2013-09-24
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 .................................................................................................... 27
7.0
INSTALLING GAS PIPING .............................................................................................. 29
8.0
LIGHTING THE BOILER ................................................................................................. 31
9.0
GAS VALVE AND BURNER SET-UP ............................................................................ 33
10.0 BOILER AND HEATING SYSTEM PIPING ................................................................... 36
11.0 LEAD LAG INSTRUCTIONS ........................................................................................... 48
12.0 FIELD WIRING ................................................................................................................. 51
13.0 WIRING SCHEMATICS ................................................................................................... 56
14.0 INSTALLATION CHECKLIST ........................................................................................ 58
15.0 ANNUAL MAINTENANCE AND INSPECTION ........................................................... 59
16.0 TROUBLESHOOTING ..................................................................................................... 61
17.0 PARTS LIST ...................................................................................................................... 83

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
NEW PRODUCT LINE
High Efficiency Firetube
Condensing Gas Boiler
H
NTI # 84535

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March 27, 2025

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Mr. Anderson
March 27, 2025

The tech support phone number for NTI Tft60 - 399 is 1-800-688-2575.

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Summary of Contents for NTI Tft60 - 399

  • Page 1 Trinity Tft NEW PRODUCT LINE High Efficiency Firetube Model Numbers: Tft60 - 399 Condensing Gas Boiler Version Date: 2013-09-24 INSTALLATION AND OPERATION INSTRUCTIONS FOR TRINITY Tft BOILER TABLE OF CONTENTS INTRODUCTION ........................ 3 SPECIFICATIONS ......................6 BOILER LOCATION ......................7 GENERAL VENTING .......................
  • 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 Figure 3-1 Closet Installation, Minimum Clearances (Model Tft60-110 Shown) Min. 1” clearance for hot water and vent pipes Top ventilation opening Max. 6” below ceiling / top Ventilation air opening Top = 12” per 1000 Btu/hr, min.
  • 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

    │Installation and Operation Instructions Trinity Tft Series 4.0 GENERAL VENTING The Trinity Tft is certified as a “Category IV” boiler requiring a “Special Venting System” designed for pressurized venting. The Exhaust Vent must be piped to the outdoors, using the vent materials and rules outlined in this section.
  • Page 11 │ Trinity Tft Series Installation and Operation Instructions 2. One Permanent Opening Method – One permanent opening, commencing within 12 in. of the top of the enclosure, shall be provided. The appliance shall have clearances of at least 1 in. from the sides and back and 6 in.
  • Page 12 │Installation and Operation Instructions Trinity Tft Series Combustion Air-inlet Contamination Be careful not to locate the air-inlet termination in an area where contaminants can be drawn in and used for combustion. Combustion air containing dust, debris or air-borne contaminants will drastically increase the required maintenance and may cause a corrosive reaction in the Heat Exchanger which could result in premature failure, fire, serious injury, or death.
  • 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 * Pipe * Air Inlet Air Inlet...
  • 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* account for slope Swing Joint SS Appliance Adapter...
  • 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 │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 17 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 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) IPEX 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: Exhaust 1. Excavate site to a point below where the pipes are to exit as shown. 2. Ensure the wall is fully sealed where the pipes penetrate.

  • 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 │Installation and Operation Instructions Trinity Tft Series Extra precaution must be taken to adequately support the weight of the Vent/Air-inlet piping in applications using roof-top terminations. Failure to follow these instructions may result in venting or boiler component failure resulting in flue gas spillage leading to property damage, serious injury or death.

  • Page 27: Condensate Drain

    │ Trinity Tft Series Installation and Operation Instructions 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 28 │Installation and Operation Instructions Trinity Tft Series Figure 6-1 Condensate Drain Piping  Boiler Condensate Drain Outlet Nut and Gasket Inlet Retaining Nut Ball -float   Inlet Gasket Ball-float Outlet Retaining Nut firmly tightened Hose-barb Adapter Condensate Trap Inlet pushed up until it bottoms-out on Boiler Condensate Drain...

  • Page 29: 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 30 │Installation and Operation Instructions Trinity Tft Series 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 31: Lighting The Boiler

    │ Trinity Tft Series Installation and Operation Instructions 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 32 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 33: Gas Valve And Burner Set-Up

    │ Trinity Tft Series Installation and Operation Instructions 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 34 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 35 │ Trinity Tft Series Installation and Operation Instructions 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 36: 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 37 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 38 │Installation and Operation Instructions Trinity Tft Series 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 Valve (alternate...
  • Page 39 │ Trinity Tft Series Installation and Operation Instructions 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...
  • Page 40 │Installation and Operation Instructions Trinity Tft Series 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 41 (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 42 │Installation and Operation Instructions Trinity Tft Series 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) ¾”...
  • Page 43 │ Trinity Tft Series Installation and Operation Instructions 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 44 │Installation and Operation Instructions Trinity Tft Series 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 45 │ Trinity Tft Series Installation and Operation Instructions Indirect Fired Water Heater – When installed as per Figure 10-6, the indirect fired water heater is in series with the boiler during a demand for DHW. Therefore, its head loss, along with the head loss of the boiler and associated piping, must be considered when sizing the circulator.
  • Page 46 │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 47 │ 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 48: 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 49: Field Wiring

    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 2-4. Wire the system sensor to SENSOR COM and SYSTEM of the Master Boiler; see Field Wiring Table 12-2a and Figure 12-2.
  • Page 50 │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 51 │ 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 52 │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 53 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 54 │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 55 │ 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 56: Wiring Schematics

    │Installation and Operation Instructions Trinity Tft Series 13.0 WIRING SCHEMATICS Figure 13-1 Tft Connection Diagram...
  • Page 57 │ Trinity Tft Series Installation and Operation Instructions Figure 13-2 Tft Ladder/Logic Diagram...

  • Page 58: 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. ...
  • Page 59 Combustion Chamber Cleaning Procedure NTI recommends having the combustion chamber cleaned after the first year of operation, with subsequent cleanings scheduled based on the condition of the combustion chamber at the time. Units operating with LP Gas or in an industrial environment may require more frequent cleanings.
  • Page 60 │Installation and Operation Instructions Trinity Tft Series Refractory Ceramic Fibers (RFC) Personal Protective Equipment Recommended - Read the following warnings and handling instructions carefully before commencing any service work in the combustion chamber. The insulating material on the inside of the burner plate contains Refractory Ceramic Fibers and should not be handled without personal protective equipment.

  • Page 61: Troubleshooting

    │ Trinity Tft Series Installation and Operation Instructions 16.0 TROUBLESHOOTING Observe the following precautions when servicing the boiler. Failure to comply with these may result in fire, property damage, serious injury or death. Servicing the Boiler  Disconnect or shutoff all energy sources to the boiler: 120VAC power, water and gas. ...
  • Page 62 │Installation and Operation Instructions Trinity Tft Series Figure 16-1 Tft Control Panel Figure 14-1 Tft Model Fuse “C” ATO 2A 32V Auto Blade Type Fuses “A” and “B” 3AG Control Panel Cover 7A 250 Fast-Acting Control Panel Fuses The Trinity Tft is equipped with three (3) fuses. Check these fuses before replacing the controller or any other electrical component;...
  • Page 63 │ Trinity Tft Series Installation and Operation Instructions System Disconnected If the Touch-screen Display is not blank, but is displaying “System Disconnected!” in the middle of the screen, ensure the 4 by 1 Molex connector, located behind the display at the top, is connected and that the wires are fully inserted (see Figures 15-2 and 15-3).
  • Page 64 │Installation and Operation Instructions Trinity Tft Series Summary and Diagnostics Display – The Trinity Tft controller and Touch-screen display provides detailed operational and diagnostic information for aid in troubleshooting. When power is applied to the appliance the initial page displayed is the Summary page. Information presented on the Summary page includes Demand source, Burner state, status of sensors and pumps, and so forth.
  • Page 65 Figure 10-1. Incorrect factory sensor wiring Disconnect flue sensor cable; screen should display “Hold 92 – Outlet sensor fault”; if not contact NTI. Lockout or Hold 88 – Outlet Insufficient water flow See Lockout or Hold 81.
  • Page 66 │Installation and Operation Instructions Trinity Tft Series Table 16-1 Troubleshooting Chart PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Hold 95 – Stack sensor fault Faulty sensor Check resistance of sensor and compare to thermistor resistance chart, see Table 16-2. (Note the Outlet sensor incorporates two sensors, check resistance individually.) Hold 110 –...
  • Page 67 │ Trinity Tft Series Installation and Operation Instructions Table 16-1 Troubleshooting Chart PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Lockout 173 - Pilot relay External Electrical Noise Look for sources of electrical noise, i.e. a large feedback incorrect motor or multiple pieces of equipment starting at the same time.
  • Page 68 │Installation and Operation Instructions Trinity Tft Series Table 16-1 Troubleshooting Chart PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Blower not operating Faulty blower Measure voltage across pins 1 & 2 (black and white wires) of 3-position connector on wiring harness. If 120VAC detected, reconnect then and remove 5-position signal connector.
  • Page 69 │ Trinity Tft Series Installation and Operation Instructions Table 16-3 Hold and Lockout Codes Code Description Note Internal fault: Bias changed since heating cycle starts Hold Internal fault: Spark voltage stuck low or high Hold Internal fault: Spark voltage changed too much during flame sensing time Hold Internal fault: Static flame ripple Hold...
  • Page 70 │Installation and Operation Instructions Trinity Tft Series Table 16-3 Hold and Lockout Codes Code Description Note Demand lost in run Hold Outlet high limit Hold DHW high limit Disabled Delta T limit Hold / Lockout Stack limit Lockout Delta T exchanger/outlet limit Disabled Delta T inlet/exchanger limit Disabled...
  • Page 71 │ Trinity Tft Series Installation and Operation Instructions Table 16-3 Hold and Lockout Codes Code Description Note Fan speed failed during ignition Hold / Lockout Fan movement detected during standby Hold Fan speed failed during run Hold 133-135 RESERVED Interrupted Airflow Switch failed to close Hold ILK failed to close Hold...
  • Page 72 │Installation and Operation Instructions Trinity Tft Series Table 16-3 Hold and Lockout Codes Code Description Note Invalid DHW high limit enable setting Lockout Invalid DHW high limit response setting Lockout Invalid Flame sensor type setting Lockout Invalid interrupted air switch enable setting Lockout Invalid interrupted air switch start check enable setting Lockout...
  • Page 73 │ Trinity Tft Series Installation and Operation Instructions Table 16-3 Hold and Lockout Codes Code Description Note Invalid Inlet connector type setting Lockout Invalid DHW connector type setting Lockout Invalid Stack connector type setting Lockout Invalid Header connector type setting Lockout Invalid Outdoor connector type setting Lockout...
  • Page 74 │Installation and Operation Instructions Trinity Tft Series Table 16-4 Alert Codes Code Description Safety group verification table was updated Invalid Parameter PCB was detected Invalid Range PCB was detected Alarm silence time exceeded maximum Invalid safety group verification table was detected Backdoor password could not be determined Invalid safety group verification table was not accepted CRC errors were found in application configuration data blocks...
  • Page 75 │ Trinity Tft Series Installation and Operation Instructions Table 16-4 Alert Codes Code Description Burner control rate (non-firing) was < absolute min rate Burner control rate (non-firing) was absent Burner control rate (non-firing) was invalid, % vs. RPM Fan off cycle rate was invalid, % vs. RPM Set point was over ridden due to sensor fault Modulation was over ridden due to sensor fault No demand source was set due to demand priority conflicts...
  • Page 76 │Installation and Operation Instructions Trinity Tft Series Table 16-4 Alert Codes Code Description Mix modulation range (max minus min) was too small (< 4% or 40 RPM) Fan was limited to its minimum duty cycle Manual rate was > CH max modulation rate Manual rate was >...
  • Page 77 │ Trinity Tft Series Installation and Operation Instructions Table 16-4 Alert Codes Code Description DHW temperature was invalid DHW inlet temperature was invalid DHW outlet temperature was invalid DHW high limit must be disabled for Auto mode DHW sensor type was not compatible for Auto mode DHW priority source setting was invalid DHW priority method setting was invalid CH S5 (J8-11) sensor was invalid...
  • Page 78 │Installation and Operation Instructions Trinity Tft Series Table 16-4 Alert Codes Code Description Lead Lag drop stage method setting was invalid CH frost protection temperature was invalid CH frost protection inlet temperature was invalid DHW frost protection temperature was invalid No anticondensation setpoint was configured for frost protection RESERVED DHW priority override time was not derated due to invalid outdoor temperature...
  • Page 79 │ Trinity Tft Series Installation and Operation Instructions Table 16-4 Alert Codes Code Description Abnormal Recycle: Demand off during Pilot Flame Establishing Period Abnormal Recycle: LCI off during Drive to Purge Rate Abnormal Recycle: LCI off during Measured Purge Time Abnormal Recycle: LCI off during Drive to Light off Rate Abnormal Recycle: LCI off during Pre-Ignition test Abnormal Recycle: LCI off during Pre-Ignition time...
  • Page 80 │Installation and Operation Instructions Trinity Tft Series Table 16-4 Alert Codes Code Description Abnormal Recycle: Safety Relay off after 10 seconds of RUN Abnormal Recycle: Hardware flame bias Abnormal Recycle: Hardware static flame Abnormal Recycle: Hardware flame current invalid Abnormal Recycle: Hardware flame rod short Abnormal Recycle: Hardware invalid power Abnormal Recycle: Hardware invalid AC line Abnormal Recycle: Hardware SLO flame ripple...
  • Page 81 │ Trinity Tft Series Installation and Operation Instructions Table 16-4 Alert Codes Code Description Internal error: Lead Lag master PID I-scaler was invalid Internal error: Lead Lag master PID D-scaler was invalid Abnormal Recycle: Hardware flame bias high Abnormal Recycle: Hardware flame bias low Abnormal Recycle: Hardware flame bias delta high Abnormal Recycle: Hardware flame bias delta low Abnormal Recycle: Hardware flame bias dynamic high...
  • Page 82 │Installation and Operation Instructions Trinity Tft Series Table 16-4 Alert Codes Code Description Internal error: Safety key bit 4 was incorrect Internal error: Safety key bit 5 was incorrect Internal error: Safety key bit 6 was incorrect Internal error: Safety key bit 7 was incorrect Internal error: Safety key bit 8 was incorrect Internal error: Safety key bit 9 was incorrect Internal error: Safety key bit 10 was incorrect...

  • Page 83: Parts List

    │ Trinity Tft Series Installation and Operation Instructions 17.0 PARTS LIST For a list of parts that corresponds to the item numbers in the callouts, refer to Table 17-1. Note that some item numbers may appear more than once in the parts list depending on which model number is being referenced. Building Owners - Replacement parts are available from your stocking wholesaler.
  • Page 84 │Installation and Operation Instructions Trinity Tft Series Figure 17-1(b) Tft Cabinet Cabinet, Vent and Air-Inlet Parts Figure 17-1(c) Tft Controls Electrical Housing, Controller, and Display Module...

  • Page 85: Tft60-110 3

    │ Trinity Tft Series Installation and Operation Instructions Figure 17-1(d) Tft Installation Kit Natural to LP Conversion Kit Table 17-1 Parts List: Tft Model Item Part # Description 84541 Premix burner (Tft60-110) 84547 Premix Burner (Tft155-250) 84552 Premix burner (Tft300-399) 84542 Premix Burner Gasket (Tft60-110) 84548...
  • Page 86 │Installation and Operation Instructions Trinity Tft Series Item Part # Description 84470 Gas Valve Natural Gas Orifice 9.6mm (Tft300-399) 83206 Orifice Gasket (Tft60-399) 82054 Gas Valve (Tft60-250) Gas Valve (Tft300-399) 82989 Ignition Electrode, Dual – c/w gasket 83870 82774 Flame Rod Gasket 82600 Gas Valve Regulator Vent Adapter 83883...
  • Page 87 │ Trinity Tft Series Installation and Operation Instructions Item Part # Description 1 ½” MJ Coupling (Tft60-250) 82099 83951 2" MJ Coupling (Tft300-399) 84557 Air-inlet Assembly (Tft60-110) 84558 Air-inlet Assembly (Tft155-250) 84559 Air-inlet Assembly (Tft300-399) Flue Outlet Adapter, SS, 3” (Tft60-110) 84437 Flue Outlet Adapter, SS, 3”...
  • Page 88 │Installation and Operation Instructions Trinity Tft Series Item Part # Description 82253 Torx Allen Key (Tft60-250) (Included in Kit 82650-1 w/ Tft60-250) 83955 Lower Wall Mount Bracket 82913 Condensate Trap 84560 Top Panel (Tft60-110) 84561 Top Panel (Tft155-255) 84562 Top Panel (Tft300-399) 84563 Top Panel Access Cover (Tft60-110) 84564...

This manual is also suitable for:

Trinity tft tft60Trinity tft tft85Trinity tft tft110Trinity tft tft155Trinity tft tft175Trinity tft tft200 ... Show all

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