NTI Trinity Tft399 Installation And Operation Manual
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NTI Trinity Tft399 Installation And Operation Manual

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Trinity Tft
Model Numbers: Tft60 - 399
Version Date: 2018-09-07
INSTALLATION AND OPERATION MANUAL 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 ..................................................... 25
6.0
CONDENSATE DRAIN .................................................................................................... 27
7.0
INSTALLING GAS PIPING .............................................................................................. 27
8.0
LIGHTING THE BOILER ................................................................................................. 32
9.0
GAS VALVE AND BURNER SET-UP ............................................................................ 34
10.0 BOILER AND HEATING SYSTEM PIPING ................................................................... 38
11.0 LEAD LAG INSTRUCTIONS ........................................................................................... 50
12.0 FIELD WIRING ................................................................................................................. 53
13.0 WIRING SCHEMATICS ................................................................................................... 58
14.0 INSTALLATION CHECKLIST ........................................................................................ 60
15.0 ANNUAL MAINTENANCE AND INSPECTION ........................................................... 61
16.0 TROUBLESHOOTING ..................................................................................................... 63
17.0 PARTS LIST ...................................................................................................................... 86
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
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NTI # 84535

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  • 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 Trinity Tft boilers are factory set to operate with Natural Gas; BEFORE OPERATING WITH PROPANE, the boiler must be converted using the appropriate Natural Gas to LP Conversion Kit; see below. Failure to properly convert the unit to safely operate with Propane will cause dangerous burner operation, resulting in property damage, serious injury or death.
  • 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 Tft154 Tft201 Tft285 Tft340 Tft399 CSA Input Modulation 17-60 17-85 21.6-108 15.4-154 20-200 28.5-285 39.9-340 39.9-399 [MBH] DOE Heating Capacity [MBH] Net I=B=R Rating [MBH] DOE AFUE 95.4...

  • 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] 16 [407] 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 Universal Exhaust-vent & Air-inlet Appliance Adapter (Tft154 only) Gasket Identification and Pipe Insertion Depth Upper Gasket – 3.5” OD Seal 2.36” (CPVC/PVC) use with CPVC (PVC for Air-inlet) 3.46” (PP) Middle Gasket –...
  • Page 14 │Installation and Operation Instructions Trinity Tft Series Figure 4-3(a) Trinity Tft60-154 & 340-399 Figure 4-3(b) Trinity Tft60-154 & 340-399 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 Swing Joint...
  • Page 15 │ Trinity Tft Series Installation and Operation Instructions Figure 4-3(e) Trinity Tft60-154 & 340-399 Figure 4-3(f) Trinity Tft60-154 & 340-399 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 16 │Installation and Operation Instructions Trinity Tft Series Vent/Air-inlet Pipe Material Table 4-4 Acceptable Vent and Air-Inlet Pipe Material Venting System Standards 2, 3 Items Materials Canada United States PVC - DWV ANSI/ASTM D2265 Vent Air-Inlet materials installed on gas PVC Schedule 40 ANSI/ASTM D1785 Vent Piping fired appliances in CAN/US...
  • Page 17 Kits certified with the Trinity Tft are listed in Table 4-7 and available from the manufacturers listed in Table 4-6. Kits with an NTI part number listed in Table 4-7, are available directly from NTI. Table 4-6 Optional Termination Kit OEMs...
  • Page 18 Table 4-7 Optional Vent Termination Kits Vent Option Vent Vent Material Description Supplier P/N Figure Size Compatibility Roof Wall 2” 196984 (NTI P/N 85062)   3” IPEX Low Profile (Wall) 196985 (NTI P/N 84357) 4-4(b), 4-6(c) PVC/CPVC 4” 196986 (NTI P/N 84358) 2” 196125 196116 (NTI P/N 82666), 3”...
  • Page 19 │ Trinity Tft Series Installation and Operation Instructions Sidewall Venting Options – Direct Vent Installation Figure 4-4(a) Figure 4-4(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 4-3.
  • Page 20 │Installation and Operation Instructions Trinity Tft Series Roof Venting Options – Direct Vent Installation Figure 4-5(a) Figure 4-5(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 4-3.
  • Page 21 │ Trinity Tft Series Installation and Operation Instructions Sidewall Termination Details – Direct Vent Installation Figure 4-6(a) Figure 4-6(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.
  • Page 22 │Installation and Operation Instructions Trinity Tft Series  Roof Termination Details – Direct Vent Installation Figure 4-7(a) Figure 4-7(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 23 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 24 │Installation and Operation Instructions Trinity Tft Series Figure 4-8 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 25: Vent/Air-Inlet Termination Clearances

    │ Trinity Tft Series Installation and Operation Instructions 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 26 │Installation and Operation Instructions Trinity Tft Series 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 – Minimum 1 ft. [305 mm] Two-Pipe Termination Clearance “Q”...

  • 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 Inlet Gasket Inlet Condensate Trap Outlet   Cleanout Cap Inlet Gasket Boiler Condensate Drain Outlet Gasket Ball-float Outlet Retaining Nut Corrugated Outlet Tube  Inlet Retaining Nut firmly tightened ...
  • Page 29 │ Trinity Tft Series Installation and Operation Instructions 7.0 INSTALLING GAS PIPING Trinity Tft boilers are factory set to operate with Natural Gas; BEFORE OPERATING WITH PROPANE, the boiler must be converted using the appropriate Natural to LP Conversion Kit; see Table 7-1. Failure to properly convert the unit to safely operate with Propane will cause dangerous burner operation, resulting in property damage, serious injury or death.
  • Page 30 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 31 │ 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 32: 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 33 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 34: 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 35 Screw, to be within the limits listed in Table 9-1. 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.
  • Page 36 │Installation and Operation Instructions Trinity Tft Series 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. See Table 7-1 and Propane conversion instructions. Failure to perform the flue gas analysis and adjustment detailed in this section may result in erratic and unreliable burner operation, leading to reduced efficiency, increased fuel consumption, reduced component life, heat exchanger combustion deposits, and general...
  • Page 37 │ Trinity Tft Series Installation and Operation Instructions Figure 9-2 Tft154 & Tft201 Gas Valve Adjustment DO NOT Adjust Gas Valve Throttle / Input Line Pressure Adjustment Screw Test Port Figure 9-3 Tft285-399 Gas Valve Adjustment (Tft340-399 Illustrated) Throttle / Input Remove access cover, Adjustment Screw DO NOT Adjust...

  • Page 38: Boiler And Heating System Piping

    Failure to follow the instructions provided in this section will void the NTI warranty and may result in property damage, fire, serious injury or death.
  • Page 39 │ Trinity Tft Series Installation and Operation Instructions Dirt Removal – A dirt removal device should be installed in all systems. In older systems containing cast iron radiators/baseboard or large amount black iron or steel pipe a magnetic dirt separator must be installed. Glycol, Snow Melt, and Oxygen Permeable Piping –...
  • Page 40 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 41 │ Trinity Tft Series Installation and Operation Instructions   Near Boiler Piping (Tft60-154) Figure 10-1(a) Supply/Return Bottom Figure 10-1(b) Supply/Return Top Auto Air-Vent (factory Supplied) Auto Air-Vent (factory Supplied) Inlet Pressure Relief Valve (factory Supplied) Pressure Relief Valve (factory Supplied) Press.
  • Page 42 │Installation and Operation Instructions Trinity Tft Series Near Boiler Piping (Tft201-285) Figure 10-2(a) Supply/Return Bottom Figure 10-2(b) Supply/Return Top Auto Air-Vent (factory Supplied) Auto Air-Vent Inlet (factory Supplied) Pressure Relief Valve Pressure Relief Valve (factory Supplied) (factory Supplied) Outlet Press. & Temp. Gauge (factory Supplied) Pressure Relief Valve (alt.
  • Page 43 │ Trinity Tft Series Installation and Operation Instructions Near Boiler Piping (Tft340-399) Figure 10-3(a) Supply/Return Bottom Figure 10-3(b) Supply/Return Top Auto Air-Vent Auto Air-Vent Inlet (factory Supplied) (factory Supplied) Pressure Relief Valve (factory Supplied) Pressure Relief Valve (factory Supplied) Outlet Inlet Press.
  • Page 44 (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 45 │ 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 0015-MS...
  • Page 46 │Installation and Operation Instructions Trinity Tft Series Figure 10-4(a) Tft60-110 Head Loss Curve Flow Rate (US gpm) Figure 10-4(b) Tft154-285 Head Loss Curve Flow Rate (US gpm) Figure 10-4(c) Tft340-399 Head Loss Curve Flow Rate (US gpm)
  • Page 47 │ 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 48 │Installation and Operation Instructions Trinity Tft Series Figure 10-5 Plumbing Schematic – Single Central Heating Circulator Figure 10-5 illustrates the basic plumbing requirements for a Trinity Tft boiler installation with a single Central Heating circulator, and an Indirect Water Heater. Refer to Figures 10-1 through 10-3 for identification of boiler water connections, as their locations will vary between boiler models.
  • Page 49 │ Trinity Tft Series Installation and Operation Instructions Figure 10-6 Plumbing Schematic – Multiple Central Heating Circulators Figure 10-6 illustrates the basic plumbing requirements for a Trinity Tft boiler installation with a multiple Central Heating circulators, and an Indirect Water Heater. Refer to Figures 10-1 through 10-3 for identification of boiler water connections, as their locations will vary between boiler models.

  • Page 50: 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 51 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 52 │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 53: 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 54 │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 55 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 56 │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 57 │ 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 58: Wiring Schematics

    │Installation and Operation Instructions Trinity Tft Series 13.0 WIRING SCHEMATICS Figure 13-1 Tft Connection Diagram...
  • Page 59 │ Trinity Tft Series Installation and Operation Instructions Figure 13-2 Tft Ladder/Logic Diagram...

  • Page 60: Installation Checklist

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

  • Page 61: Annual Maintenance And Inspection

    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 62 │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 63: 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 64 │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 65 │ 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 16-2 and 16-3).
  • Page 66 │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 67 Figure 10-1. Incorrect factory sensor wiring Disconnect flue sensor cable; screen should display “Hold 95 – Stack sensor fault”; if not contact NTI. Lockout or Hold 88 – Outlet Insufficient water flow See Lockout or Hold 81.
  • Page 68 │Installation and Operation Instructions Trinity Tft Series Table 16-1 Troubleshooting Chart PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Hold 91– Inlet sensor fault Faulty sensor Check resistance of sensor and compare to thermistor resistance chart, see Table 16-2. Hold 92 – Outlet sensor fault Sensor disconnected Check sensor connection located on the top of the heat exchanger.
  • Page 69 │ Trinity Tft Series Installation and Operation Instructions Table 16-1 Troubleshooting Chart PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Lockout 113 – Flame circuit A flame circuit shorted to ground Check to ensure condensate drain is not blocked. timeout may show up as a flame circuit Check to ensure no voltage is applied to R &...
  • Page 70 │Installation and Operation Instructions Trinity Tft Series Table 16-1 Troubleshooting Chart PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION If Fuse “B” not blown, and Sola controller is pump Faulty Sola controller operating, navigate to pump diagnostic on display. Manually switch pump on, check for 120VAC at pump connection terminal on line voltage barrier strip.
  • Page 71 │ Trinity Tft Series Installation and Operation Instructions Table 16-3 Hold and Lockout Codes Code Description Note Waiting for safety data verification Lockout Internal fault: Hardware fault Hold Internal fault: Safety Relay key feedback error Hold Internal fault: Unstable power (DCDC) output Hold Internal fault: Invalid processor clock Hold...
  • Page 72 │Installation and Operation Instructions Trinity Tft Series Table 16-3 Hold and Lockout Codes Code Description Note Pump fault Hold Motor tachometer fault Hold AC inputs phase reversed Lockout Safety GVT model ID doesn’t match application’s model ID Lockout Application configuration data block CRC errors Lockout 56-57 RESERVED...
  • Page 73 │ Trinity Tft Series Installation and Operation Instructions Table 16-3 Hold and Lockout Codes Code Description Note Flame lost in run Lockout Ignition failed Lockout Ignition failure occurred Hold Flame current lower than WEAK threshold Hold Pilot test flame timeout Lockout Flame circuit timeout Lockout...
  • Page 74 │Installation and Operation Instructions Trinity Tft Series Table 16-3 Hold and Lockout Codes Code Description Note Pilot valve OFF Lockout Block intake ON Lockout Block intake OFF Lockout 166-168 RESERVED Safety opto bad in test state Lockout Safety relay opto feedback incorrect Lockout Safety relay feedback incorrect in run Lockout...
  • Page 75 │ Trinity Tft Series Installation and Operation Instructions Table 16-3 Hold and Lockout Codes Code Description Note Invalid Purge rate proving setting Lockout Invalid Run flame failure response setting Lockout Invalid Run stabilization time setting Lockout Invalid Stack limit enable setting Lockout Invalid Stack limit response setting Lockout...
  • Page 76 │Installation and Operation Instructions Trinity Tft Series Table 16-3 Hold and Lockout Codes Code Description Note Invalid preferred outlet high limit setting Lockout Invalid preferred lightoff rate setting Lockout Invalid preferred stack limit rate setting Lockout Table 16-4 Alert Codes Code Description None (No alert)
  • Page 77 │ Trinity Tft Series Installation and Operation Instructions Table 16-4 Alert Codes Code Description Alert PCB in Program Module was too large for product IAS start check was forced on due to IAS enabled Low voltage was detected in safety processor High line frequency occurred Low line frequency occurred Invalid subsystem reset request occurred...
  • Page 78 │Installation and Operation Instructions Trinity Tft Series Table 16-4 Alert Codes Code Description Forced rate was out of range vs. min/max modulation Forced rate was invalid, % vs. RPM Slow start ramp value was invalid Slow start degrees value was invalid Slow start was ended due to outlet sensor fault Slow start was end due to reference set point fault CH max modulation rate was invalid, % vs.
  • Page 79 │ Trinity Tft Series Installation and Operation Instructions Table 16-4 Alert Codes Code Description CH control was suspended due to fault CH header temperature was invalid CH outlet temperature was invalid CH steam pressure was invalid Minimum water temperature parameter was greater than setpoint Minimum water temperature parameter was greater than time of day setpoint CH modulation rate source parameter was invalid DHW demand source was invalid...
  • Page 80 │Installation and Operation Instructions Trinity Tft Series Table 16-4 Alert Codes Code Description Lag selection setting was invalid Lead Lag slave return setting was invalid Lead Lag add stage method setting was invalid STAT may not be a Lead Lag CH demand source when Remote Stat is enabled Lead Lag base load rate setting was invalid Lead Lag master was suspended due to fault Lead Lag slave was suspended due to fault...
  • Page 81 │ Trinity Tft Series Installation and Operation Instructions Table 16-4 Alert Codes Code Description CH ODR time of day setpoint was invalid CH ODR time of day set point exceeds normal set point CH max outdoor set point was invalid CH min outdoor setp oint was invalid CH min water set point was invalid CH outdoor temperature range was too small (minimum 12 C / 22 F)
  • Page 82 │Installation and Operation Instructions Trinity Tft Series Table 16-4 Alert Codes Code Description Abnormal Recycle: Interrupted air flow switch was off during Main Flame Establishing Period Abnormal Recycle: Ignition failed due to interrupted air flow switch was off Abnormal Recycle: ILK off during Drive to Purge Rate Abnormal Recycle: ILK off during Measured Purge Time Abnormal Recycle: ILK off during Drive to Light off Rate Abnormal Recycle: ILK off during Pre-Ignition test...
  • Page 83 │ Trinity Tft Series Installation and Operation Instructions Table 16-4 Alert Codes Code Description Abnormal Recycle: Hardware HFS LFS shorted Abnormal Recycle: Invalid zero crossing Abnormal Recycle: fault stack sensor Abnormal Recycle: stack limit Abnormal Recycle: delta T limit Abnormal Recycle: fault outlet sensor Abnormal Recycle: outlet high limit Abnormal Recycle: fault DHW sensor Abnormal Recycle: DHW high limit...
  • Page 84 │Installation and Operation Instructions Trinity Tft Series Table 16-4 Alert Codes Code Description LCI demand lost in run Demand lost in run STAT demand lost in run Demand lost in run due to no flame LCI lost in Combustion Pressure Establishing Period LCI lost in Combustion Pressure Stabilizing Period RESERVED Internal error: EEPROM write was attempted before EEPROM was initialized...
  • Page 85 │ Trinity Tft Series Installation and Operation Instructions Table 16-4 Alert Codes Code Description Lead Lag ODR boost max offpoint temperature was too low Time to rotate lead boiler to next firing slave Time to rotate lead boiler to next available slave Time to rotate lead boiler to first firing slave in order Time to rotate lead boiler to lowest running slave Lead boiler was rotated based on new firing sequence order...

  • Page 86: Parts List

    │Installation and Operation Instructions Trinity Tft Series 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 87 │ Trinity Tft Series Installation and Operation Instructions Figure 17-1(b) Tft154 & Tft201 Heat Engine and Gas Train (Tft154 Illustrated)
  • Page 88 │Installation and Operation Instructions Trinity Tft Series Figure 17-1(c) Tft285-399 Heat Engine and Gas Train (Tft340-399 Illustrated)
  • Page 89 │ Trinity Tft Series Installation and Operation Instructions Figure 17-1(d) Tft Cabinet, Vent and Air-inlet Parts (Tft60-110 Illustrated) Figure 17-1(e) Tft Control Panel...
  • Page 90 │Installation and Operation Instructions Trinity Tft Series Figure 17-1(f) Tft Installation Kit Natural to LP Conversion Kit Table 17-1 Trinity Tft Parts List Item Part # Models Description 84541 Tft60-110 Premix Burner 85453 Tft154, Tft201 Premix Burner Tft155, Tft175, Tft200, 84547 Premix Burner Tft250, Tft285...
  • Page 91 │ Trinity Tft Series Installation and Operation Instructions Item Part # Models Description 85797 Tft201 LP-Venturi Insert 84434 Tft60-85 Gas Valve Orifice 4.15mm, LP 82650 Tft110 Gas Valve Orifice 5.2mm, LP Tft155, Tft175, Tft200, 84157 Gas Valve Orifice 6.2mm, LP Tft250 85798 Tft285...
  • Page 92 │Installation and Operation Instructions Trinity Tft Series Item Part # Models Description 85785 Tft201 Heat Exchanger ASME Tft155, Tft175, Tft200, 84456 Heat Exchanger ASME Tft250, Tft285 85346 Tft340 Heat Exchanger ASME 84459 Tft300, Tft399 Heat Exchanger ASME 84505 Tft285-399 Tube Strap 84504 Tft60-250 Tube Strap...
  • Page 93 │ Trinity Tft Series Installation and Operation Instructions Item Part # Models Description Grommet, Vinyl, 7/8” OD, 1/2" IPS (1020T) 83505 Tft60-250 83923 Tft285-399 Grommet, Vinyl, 3/4" IPS (1020) 83506 Tft60-154 Grommet, Vinyl, 1-3/8" OD (1300) 84439 Tft155-285 Grommet, Vinyl 1-1/4" IPS (1625) 84440 Tft300-399 Grommet, Vinyl 1-1/2"...
  • Page 94 │Installation and Operation Instructions Trinity Tft Series Item Part # Models Description Tft154 Top Panel Access Cover 84564 Tft155-250 Top Panel Access Cover Tft285 Top Panel Access Cover 84565 Tft300-399 (pre s/n 20916) Top Panel Access Cover Tft340-399 (post s/n 90974) Top Panel Access Cover 84560 Tft60-110...
  • Page 95 │ Trinity Tft Series Installation and Operation Instructions Item Part # Models Description 84468 Tft300-399 Brass Tee, 1-1/2" x 1/2" x 1-1/2" 84095 Tft60-399 Plug, 7/8" Black Dome Tft60-110, Tft155, Tft175, 82064 Gas Valve Harness Tft200, Tft250 85486 Tft154 Gas Valve Rectifier Box 86237 Tft201 Gas Valve Rectifier Box Kit...
  • Page 96 │Installation and Operation Instructions Trinity Tft Series Visit us online NY Thermal Inc. 30 Stonegate Dr. Saint John, NB E2H 0A4 Canada Technical Assistance: 1-800-688-2575 Website: www.ntiboilers.com Fax: 1-506-432-1135...

This manual is also suitable for:

Trinity tft85Trinity tft110Trinity tft154Trinity tft201Trinity tft285Trinity tft60 ... Show all

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