NTI Trinity TX51 Installation And Operation Instructions Manual
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NTI Trinity TX51 Installation And Operation Instructions Manual

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Trinity Tx
Model Numbers: Tx 51 - 200
Version Date: 2014-08-28
INSTALLATION AND OPERATION
INSTRUCTIONS FOR TRINITY Tx 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 ............................................................................ 34
10.0 BOILER AND HEATING SYSTEM PIPING ................................................................... 37
11.0 DOMESTIC HOT WATER (DHW) PIPING – TX151C & TX200C (COMBI) ............... 48
12.0 FIELD WIRING ................................................................................................................. 52
13.0 CASCADE INSTRUCTIONS ............................................................................................ 55
14.0 WIRING SCHEMATICS ................................................................................................... 57
15.0 INSTALLATION CHECKLIST ........................................................................................ 59
16.0 ANNUAL MAINTENANCE AND INSPECTION ........................................................... 60
17.0 DISPLAY MENU GUIDE ................................................................................................. 62
18.0 TROUBLESHOOTING ..................................................................................................... 74
19.0 PARTS LIST ...................................................................................................................... 77

HAZARD SYMBOLS AND DEFINITIONS

unit may result in property damage, serious injury to occupants, or possibly death.
NEW PRODUCT LINE
High Efficiency
Condensing Gas Boiler
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.
This Boiler must be installed by a licensed and trained Heating
Technician or the Warranty is Void. Failure to properly install this
H
NTI # 84874

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  • Page 1 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 # 84874...
  • Page 2 │ Warnings Tx I&O Manual 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 Tx 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 │ Introduction Tx I&O Manual Failure to use the appropriate Natural to LP Conversion Kit and Orifice when operating the Trinity Tx to operate 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 │Introduction Tx I&O Manual 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

    │ Specifications Tx I&O Manual 2.0 SPECIFICATIONS Table 2-1 Trinity Tx Specifications Tx200 Tx200C DESCRIPTION Tx51 Tx81 Tx101 Tx151 Tx151C CSA Input Modulation 7.1-57 10.3-82 12.6-101 18.9-151 18.9-151 24.9-199 24.9-199 [MBH] DOE Heating Capacity [MBH] Net I=B=R Rating [MBH] DOE AFUE Water Connections –...

  • Page 7: Boiler Location

    │Boiler Location Tx I&O Manual 3.0 BOILER LOCATION In all cases, the Trinity Tx 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: Boiler Location

    │ Boiler Location Tx I&O Manual Figure 3-1 Closet Installation, Minimum Clearances (Non-Combi Model Shown) Min. 1” clearance for hot water and vent pipes Top ventilation opening Max. 6” below ceiling / top Ventilation air opening per 1000 Btu/hr, Top = 12” min.
  • Page 9 │Boiler Location Tx I&O Manual Figure 3-2 Wall Mounting Instructions  Failure to follow instructions may Leave the Top Wall-mount Bracket (A) intact result in fire, serious injury, or death. and remove the Bottom Wall-mount Bracket (B) that is attached to the bottom-back of the This unit requires two people to lift it appliance.

  • Page 10: General Venting

    │ General Venting Tx I&O Manual 4.0 GENERAL VENTING The Trinity Tx 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 │General Venting Tx I&O Manual 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 │ General Venting Tx I&O Manual 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 │General Venting Tx I&O Manual Near Boiler Vent/Air-inlet Piping The Trinity Tx employs universal Vent and Air-inlet appliance adapters that accept either 3” PVC/CPVC or 3” Polypropylene (PPs) venting, without the need for additional adapters. The appliance adapters incorporate two seals, one for the larger diameter PVC/CPVC pipe (3.5”...
  • Page 14 │ General Venting Tx I&O Manual Figure 4-2(a) Near Boiler Vent Connections (PVC/CPVC) Exhaust Vent Preparation (PVC/CPVC) Near Boiler Venting (PVC/CPVC) PVC/CPVC – w. 1/8” bevel Air-inlet Pipe * Air Inlet Swing Joint Adapter to attain slope in (factory horizontal runs supplied) PPs Gasket &...
  • Page 15 │General Venting Tx I&O Manual Figure 4-2(c) Near Boiler Vent Connections (SS – Stainless Steel) Exhaust Vent Preparation (SS) Near Boiler Venting (SS) SS Air-inlet Pipe SS Adapter (Table 4-3) Swing Joint to attain slope in SS Exhaust horizontal runs Vent Pipe Flue Outlet SS Adapter...
  • Page 16 │ General Venting Tx I&O Manual Vent/Air-inlet Pipe Material Table 4-2 Acceptable Vent and Air-inlet Pipe Material Venting System Standards 2, 3 Items Materials United States Canada PVC - DWV ANSI/ASTM D2265 Vent Air-Inlet materials installed on gas PVC Schedule 40 ANSI/ASTM D1785 Vent Piping All venting material in...
  • Page 17 Optional Termination Kits – Direct Vent Installation Kits certified with the Trinity Tx are listed in Table 4-4 and available from IPEX, DuraVent, Centrotherm and/or NTI. For more information on System 636 Vent Kits or wholesaler locations contact IPEX directly USA: 1-800- │...
  • Page 18 │ General Venting Tx I&O Manual Sidewall Venting Options – Direct Vent Installation Figure 4-3(a) Figure 4-3(b) Two-pipe Termination (Sidewall) Low Profile Termination (Sidewall) 3” IPEX Low Profile Termination Exhaust must terminate a minimum of 18” above Air-inlet illustrated; see Figure 4-5(c) for termination;...
  • Page 19 │General Venting Tx I&O Manual Roof Venting Options – Direct Vent Installation Figure 4-4(a) Figure 4-4(b) Two-pipe Termination (Roof) Two-pipe Termination (Roof-exhaust / Sidewall-inlet) Exhaust must terminate a Exhaust must terminate a minimum of 18” above the Air- minimum of 12” above snow inlet termination;...
  • Page 20 │ General Venting Tx I&O Manual 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 │General Venting Tx I&O Manual  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 retain vent screen...
  • 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 │General Venting Tx I&O Manual 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

    │ Termination Clearances Tx I&O Manual 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 Tx specific and National Gas Code restrictions.
  • Page 25 │Termination Clearances Tx I&O Manual 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 26 │ Termination Clearances Tx I&O Manual 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

    │Condensate Drain Tx I&O Manual 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 Condensate Drain│ Tx I&O Manual Figure 6-1 Condensate Drain Piping Inlet Gasket Inlet Condensate Trap Boiler Condensate Drain Outlet  Cleanout Cap Outlet Gasket  Ball-float Outlet Gasket Outlet Retaining Nut Corrugated Outlet Tube  Inlet Retaining Nut firmly tightened ...

  • 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 │ Gas Piping Tx I&O Manual 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. Rigid Gas Line Piping Use only rigid gas line piping within the boiler cabinet.

  • Page 31: Lighting The Boiler

    │Lighting the Boiler Tx I&O Manual 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 │Lighting the Boiler Tx I&O Manual Turning Off the Boiler 1. Set the thermostat to the lowest setting, and then turn off all power to the boiler. 2. Turn the gas shutoff valve to the off position.

  • Page 34: Gas Valve And Burner Set-Up

    │ Gas Valve and Burner Set-up Tx I&O Manual 9.0 GAS VALVE AND BURNER SET-UP Set-up of the Trinity Tx 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 4. Operate the unit at the minimum modulation rate (Table 9-2). Ensure the combustion remains smooth and and CO values are lower than the values obtained during maximum modulation (Table 9-1). If not, do not adjust further, contact NTI for assistance. Flue Gas Analysis and Adjustment Each Trinity Tx 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 36 │ Gas Valve and Burner Set-up Tx I&O Manual Figure 9-1 Gas Valve and Venturi Assembly (Tx51-151) Venturi Manifold Pressure Test Port Gas Valve DO NOT Adjust Throttle / Input Adjustment Screw Line Pressure Test Port Figure 9-2 Gas Valve and Venturi Assembly (Tx200) DO NOT Adjust Gas Valve Manifold Pressure...

  • Page 37: 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 38 Note: the use of glycol may reduce the usable output capacity of the boiler, thus requiring the unit to be “down-fired” by limiting the maximum operating capacity and/or the maximum water temperature. NTI recommends against exceeding 35% concentration of glycol.
  • Page 39 │Boiler and Heating System Piping Tx I&O Manual Near Boiler Piping (Central Heating – CH) Figure 10-2(a) Figure 10-2(b) Tx51-200 (non-Combi) – Fitting Identification Tx51-200 (non-Combi) – CH Piping Boiler Outlet Boiler Inlet 30 PSI Relief Valve Inlet (factory supplied) Pressure Relief Valve Outlet...
  • 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 │Boiler and Heating System Piping Tx I&O Manual Table 10-4 Circulator and Pipe Size Requirements Recommended Primary Loop Pump Size Temp. Boiler Flow Boiler Head Minimum Model Rise (ºF) Rate (GPM) Loss (ft) Pipe Size B&G Grundfos Taco Armstrong ¾” NRF-22 UPS15-58 (1) Astro 30 (2)
  • Page 42 │ Boiler and Heating System Piping Tx I&O Manual Figure 10-3(b) Tx101, Tx151 & Tx200 Head Loss Curves 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 43 │Boiler and Heating System Piping Tx I&O Manual Indirect Fired Water Heater – When installed as per Figure 10-5, 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 44 │ Boiler and Heating System Piping Tx I&O Manual Figure 10-4 Tx51-200 Primary-Secondary Plumbing (non-Combi) (Single System Circulator Configuration) Figure illustrates the basic plumbing requirements for a Tx51-151 (non-Combi) boiler installation with a single Central Heating circulator. Refer to Figures 10-2(a) and 10-2(b) for boiler fitting identification.
  • Page 45 │Boiler and Heating System Piping Tx I&O Manual Figure 10-5 Tx51-200 Primary-Secondary Plumbing (non-Combi) (Multiple System Circulator Configuration) Figure illustrates the basic plumbing requirements for a Tx151C (Combi) boiler installation with a single Central Heating circulator. Refer to Figures 10-2(c) and 10-2(d) for boiler fitting identification.
  • Page 46 │ Boiler and Heating System Piping Tx I&O Manual Figure 10-6 Tx151C & Tx200C Primary-Secondary Plumbing (Combi) (Single System Circulator Configuration) Figure illustrates the basic plumbing requirements for a Tx-Combi boiler installation with a single Central Heating circulator. Refer to Figures 10-2(c) and 10- 2(d) for boiler fitting identification.

  • Page 47: Boiler And Heating System Piping

    │Boiler and Heating System Piping Tx I&O Manual Figure 10-7 Tx151C & Tx200C Primary-Secondary Plumbing (Combi) (Multiple System Circulator Configuration) Figure illustrates the basic plumbing requirements for a Tx-Combi boiler installation with a multiple central heating circulators. Refer to Figures 10-2(c) and 10- 2(d) for boiler fitting identification.
  • Page 48 The Tx-Combi is designed for installations where there is a limited DHW demand, such as smaller apartments and condos. In applications where there is a greater DHW demand NTI recommends the Tx51-200 (non-Combi) installed with an Indirect Fired Hot Water Heater (Figures 10-4 & 10-5), or a Tx151C or Tx200C (Combi) installed with a DHW storage tank (Figure 11-2).
  • Page 49 │DHW Piping (Combi) Tx I&O Manual Combi DHW Plumbing & Set-up DHW Inlet & Outlet Connections – The Tx-Combi has two potable water connections, Inlet & Outlet, which exit the bottom of the unit, nearest the back. The Inlet fitting is on the right and the Outlet fitting is on the left, see Figure 11-1.
  • Page 50 │ DHW Piping (Combi) Tx I&O Manual DHW Limitations – Since the Tx-Combi produces domestic hot water instantaneously; there are inherent limitations of the system:  NO STORAGE – Overall flow through the fixtures must be regulated/limited so not to exceed the ability of the boiler to heat the water.
  • Page 51 │DHW Piping (Combi) Tx I&O Manual Tx-Combi w/ DHW Storage Tank To completely avoid the DHW limitations inherent with on demand hot water heating, install a DHW storage tank as per Figure 11-2. When the tank temperature is insufficient, a Thermostat located within the storage tank completes a 120VAC circuit to operate a Potable (bronze or Stainless Steel) Circulator pump.

  • Page 52: Field Wiring

    │ Field Wiring Tx I&O Manual 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 53 DHW Tank Thermostat, or leads of an approved DHW Tank Sensor (NTI P/N: 84632), to terminals 3 and 6. When using a Thermostat, set DHW mode = 2 (menu setting 2-08). When using a Sensor, set DHW mode = 1. See Section 17.0 for more details.
  • Page 54 │ Field Wiring Tx I&O Manual Figure 12-2 Field Wiring...

  • Page 55: Cascade Instructions

    │Cascade Instructions Tx I&O Manual 13.0 CASCADE INSTRUCTIONS The Tx controller has the internal capacity to cascade (lead-lag / stage) up to 16 Tx boilers, without the use of an external controller. Use the instructions detailed in this section to set-up and install the Tx cascade system. Figure 13-1 Cascade Plumbing Schematic Communication Wiring –...
  • Page 56 Tx I&O Manual System Sensor – install a system sensor (NTI P/N: 84010) on the outlet (supply) pipe feeding the heating system, see Figure 13-1. Wire the system sensor to terminals 3 and 4 of the Managing Boiler (left boiler in illustration).

  • Page 57: Wiring Schematics

    │Wiring Schematics Tx I&O Manual 14.0 WIRING SCHEMATICS Figure 14-1 Tx Connection Diagram...
  • Page 58 │ Wiring Schematics Tx I&O Manual Figure 14-2 Tx Ladder-Logic Diagram...

  • Page 59: Installation Checklist

    │Installation Checklist Tx I&O Manual 15.0 INSTALLATION CHECKLIST Installation  1. If operating on Propane Gas, convert boiler using appropriate conversion orifice. See Table 7-1.  2. Locate the boiler in accordance with Section 3.0 of this manual.  3. Install the Vent/Air-inlet piping in accordance with Sections 4.0 and 5.0 of this manual. Ensure all joints are secured and cemented properly.

  • Page 60: 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 of the first cleaning. Units operating with LP Gas or in an industrial environment may require more frequent cleanings.
  • Page 61 │Annual Maintenance and Inspection Tx I&O Manual 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 62: Display Menu Guide

    │ Display Menu Guide Tx I&O Manual 17.0 DISPLAY MENU GUIDE Initial Power-up Immediately following power-up of the boiler, the display reads, “conn”, indicating it is connecting to the controller; this is followed by a momentary reading of the display software version, e.g. init 5250. After which the controller performs a de-air sequence that is designed to purge air from the boiler water.
  • Page 63 │Display Menu Guide Tx I&O Manual Figure 17-2 Control Console – Main Screen Water pressure Temperature units Water pressure units Boiler outlet temperature Faucet – flashes OD reset indicator – during DHW demands illuminates when OD sensor is enabled Radiator – flashes during CH demands No flame –...
  • Page 64 DHW temperature – displays the temperature reading from; (i) the Tank sensor (NTI P/N: 84632) located 1-03 in an indirect water heater or (ii) the DHW sensor inside the Tx-Combi boiler (NTI P/N: 84907). When no sensor is used, “OPEn” indicates an open circuit, and “CLOS” indicates a closed circuit – i.e. contact closure from an indirect thermostat.
  • Page 65 │Display Menu Guide Tx I&O Manual Installer Menu The Installer Menu allows access to all settings for adjustment, as well as viewing of statistical data for troubleshooting. Access the Installer Menu from any screen by pressing the MENU and OK buttons simultaneously until “2-01”...
  • Page 66 0 – off; boiler will not attempt to heat DHW in any way.  1 – tank sensor, NTI P/N: 84632, is installed in the indirect water heater and wired to boiler terminals 3 and 6. Tank temperature is adjusted via setting 2-07.
  • Page 67 │Display Menu Guide Tx I&O Manual Factory Setting Description Setting Minimum firing rate – allows the installer to increase the minimum modulation/firing rate of the 2-12 boiler; this may be necessary for troubleshooting. Range = 20-44% Maximum firing rate CH – allows the installer to decrease the maximum modulation/firing rate of 2-13 the boiler when operating on a central heat demand;...
  • Page 68 │ Display Menu Guide Tx I&O Manual Factory Setting Description Setting Night Setback Temperature – applicable only when CH mode is set to 2 (menu setting 2-03), 2-33 determines the reduction in boiler target temperature during “Night Setback Mode”, i.e. when terminals 7 and 8 receive a demand (contact closure) from a “nighttime setback”...

  • Page 69: Blocking Errors

    │Display Menu Guide Tx I&O Manual Figure 17-5c Lockout and Error History Navigation (End) End – indicates that you have reached the end of the recorded lockout or error messages. OK button – press to exit the 2-34 or 2-35 History submenu.

  • Page 70: Lockout And Error Code Descriptions

    │ Display Menu Guide Tx I&O Manual Figure 17-7 Blocking Error Navigation Err – indicates the boiler has a blocking Error code - see Table error. 17-3 for description. Installer Menu – press and hold MENU and OK buttons to view User Menu –...
  • Page 71 If power is being supplied by a generator, install an appropriately sized UPS (Uninterruptible Power Supply). Controller Malfunction – contact NTI, check field wiring, replace controller. Loc 8-9 Supply Sensor Fault – controller has sensed an invalid reading at the Supply/Outlet sensor; check cable, Loc 10 then replace sensor [see Figure 19-1(a), item 15].
  • Page 72 Faulty Earth Ground – check grounding of boiler and power supply; replace controller. Err 67 Controller Malfunction – contact NTI, check field wiring, replace controller. Err 68-71 Supply Sensor Open – check wiring to supply sensor; replace sensor [see Figure 19-1(a), item 15].
  • Page 73 Tx I&O Manual Controller Replacement Instructions This section provides important information necessary to successfully replace the boiler controller, NTI P/N 84712, in the event the original controller fails. The replacement controller must be field configured to operate on the Tx boiler model it is being installed on. This is achieved by adjusting the controller’s Appliance Type setting.

  • Page 74: Troubleshooting

    │ Troubleshooting Tx I&O Manual 18.0 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 75 │Troubleshooting Tx I&O Manual DHW setpoint (Installer Menu setting 2-07) – 120 to 140ºF recommended. o If the radiator symbol is flashing on the display, the DHW priority time may have expired. Cycle power and consider increasing the DHW priority time (Installer Menu setting 2-09). ...
  • Page 76 │ Troubleshooting Tx I&O Manual Only replace Tx controller fuse with identical part (LFT 3.15A, 250V “slow-blow”). Failure to follow this warning may result in component failure or property damage. Figure 18-1 Tx Fuse Location Figure 14-1 Tft Model Operating Fuse, LFT 3.15A –...

  • Page 77: Parts List

    │ Tx I&O Manual Parts List 19.0 PARTS LIST For a list of parts that corresponds to the item numbers in the callouts, refer to Table 19-1. 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 78 │ Parts List Tx I&O Manual Figure 19-1(b) Tx200 Gas Valve & Blower Assembly Figure 19-1(c) Tx Cabinet Cabinet, Vent and Air-Inlet Parts...
  • Page 79 │ Tx I&O Manual Parts List Figure 19-1(d) Tx Controls Electrical Housing, Controller, and Display Module Figure 19-1(e) Tx Installation Kit Box Heat Only (Tx51-200) There are 5 different Tx Conversion Kits. Each kit has the required orifice, decal and instructions. Common (All Tx Models) Natural Gas to LP Conversion Kit...
  • Page 80 │ Parts List Tx I&O Manual Item Part # Description 82766 Blower Gasket (all Tx models) 84909 Blower/Venturi Assembly, 535 (Tx51) 84910 Blower/Venturi Assembly, 534 (Tx81) 84911 Blower/Venturi Assembly, 533 (Tx101) 84912 Blower/Venturi Assembly, 532 (Tx151 & Tx151C) 85155 Blower, RG148/1200-3612, 55667.21120A (Tx200 & Tx200C) 82054-2 Venturi Gasket, Cork (Tx200 &...
  • Page 81 Wall Mount Bracket, Top (all Tx models) Gas Line Grommet, ½” IPS (all Tx models) 83505 84917 Circulator Cartridge, UPS15-78 (Tx151C & Tx200C) Thermal Fuse (all Tx models) – Contact NTI Tech Support before replacing 84886 84440 Air Vent Grommet, 1875 (all Tx models) 84872...
  • Page 82 │ Parts List Tx I&O Manual Item Part # Description 84728 Heat Exchanger Support Rail, c/w screws (Tx101 ASME) 84729 Heat Exchanger Support Rail, c/w screws (Tx151 & Tx151C ASME) 85000 Heat Exchanger Support Rail, c/w screws (Tx200 & Tx200C) 84730 Heat Exchanger Support Front Clip (all Tx models) 84919...
  • Page 83 │ Tx I&O Manual Parts List NOTES...
  • Page 84 NY Thermal Inc. 30 Stonegate Drive Saint John, NB E2H 0A4 Canada Technical Assistance: 1-800-688-2575 Website: www.nythermal.com Fax: 1-506-432-1135...

This manual is also suitable for:

Trinity tx81Trinity tx151cTrinity tx101Trinity tx200cTrinity tx151Trinity tx200

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