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Trinity Tx151 Installation And Operation Instructions Manual

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Trinity Tx
Model Numbers: Tx 51 - 151
Version Date: 2013-12-30
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 (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 ..................................................................................................... 73
19.0 PARTS LIST ...................................................................................................................... 76
HAZARD SYMBOLS AND DEFINITIONS
unit may result in property damage, serious injury to occupants, or possibly death.
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
NEW PRODUCT LINE
High Efficiency
Condensing Gas Boiler
H
NTI # 84874

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  • Page 1: Table Of Contents

    NEW PRODUCT LINE High Efficiency Model Numbers: Tx 51 - 151 Condensing Gas Boiler Version Date: 2013-12-30 INSTALLATION AND OPERATION INSTRUCTIONS FOR TRINITY Tx BOILER TABLE OF CONTENTS INTRODUCTION ........................ 3 SPECIFICATIONS ......................6 BOILER LOCATION ......................7 GENERAL VENTING ....................... 10 VENT/AIR-INLET TERMINATION CLEARANCES .............
  • Page 2 │Installation and Operation Instructions Trinity Tx Tx 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 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 LP Propane. The correct kit and LP orifice is listed below (Each kit comes with conversion instructions). Liquefied Petroleum (LP) propane gas is heavier than air; therefore, it is imperative that your Trinity Tx boiler is not installed in a pit or similar location that will permit heavier than air gas to collect. Local Codes may require boilers fueled with LP gas be provided with an approved means of removing unburned gases from the room.
  • Page 5 │ Trinity Tx Tx 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...

  • Page 6: Specifications

    High Altitude Operation The Trinity is designed to operate at its maximum listed capacity in installations located at 0-2000ft above Sea Level. Since the density of air decreases as elevation increases, maximum specified capacity should be de-rated for elevations above 2000 ft [610 m] in accordance with Table 2-2.

  • Page 7: Boiler Location

    Installation and Operation Instructions 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 │Installation and Operation Instructions Trinity Tx Tx Series 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”...
  • Page 9 │ Trinity Tx Tx Series Installation and Operation Instructions 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...

  • Page 10: General Venting

    Tx Series 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 │ Trinity Tx Tx 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 Tx Tx 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 See Figure 4-2(b). Stainless Steel Piping – The Trinity Tx has been tested and approved for use with DuraVent – FasNSeal AL29- 4C Stainless Steel Special Gas Vent. Venting with FasNSeal will require DuraVent adapter part number 300715 (contact DuraVent at 1-800-835-4429 or www.duravent.com).
  • Page 14 │Installation and Operation Instructions Trinity Tx Tx Series 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...
  • Page 15 │ Trinity Tx Tx Series Installation and Operation Instructions 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...
  • Page 16 │Installation and Operation Instructions Trinity Tx Tx Series 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...
  • Page 17 Optional Termination Kits – Direct Vent Installation Kits certified with the Trinity Tx are listed in Table 4-6 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 │Installation and Operation Instructions Trinity Tx Tx Series 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;...
  • Page 19 │ Trinity Tx Tx Series Installation and Operation Instructions 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”...
  • Page 20 │Installation and Operation Instructions Trinity Tx Tx 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”...
  • Page 21 │ Trinity Tx Tx 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.
  • Page 22 │Installation and Operation Instructions Trinity Tx Tx Series Venting Rules and Guidelines Prevailing Winds: Ensure the vent is located where it will not be exposed to normal prevailing winds. Combustion Air-inlet Contamination: Air for combustion must be drawn from an area free of dust and contaminants.
  • Page 23 Exhaust Vent Min. boiler. Chimney 18” [457 mm] 2. Flue gases don’t enter the vacant chimney. above air-inlet 3. Only Trinity certified venting materials are used, Air-Inlet Air-Inlet see Section 4.0. Min. 12” [305 mm] Existing 4. Vent lengths are within the maximums specified.

  • Page 24: Vent/Air-Inlet Termination Clearances

    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. Compliance alone doesn’t insure a satisfactory installation as good common sense must also be applied. Failure to follow these instructions may result in fire, property damage, serious injury or death.
  • Page 25 │ Trinity Tx Tx 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 Removing an Existing Boiler from Common Venting System Do not install the Trinity Tx into a common venting system with any other boiler. Failure to comply with this warning will cause flue gas spillage and leech carbon monoxide emissions into the surrounding air resulting in serious injury or death.

  • Page 27: Condensate Drain

    │ Trinity Tx Tx 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 Tx Tx Series 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

    Installation and Operation Instructions 7.0 INSTALLING GAS PIPING The Trinity Tx is factory equipped to operate with Natural Gas, the installation of a conversion kit is required prior to operating with Propane Gas. The Natural to LP Conversion Kit (see Table 7-1) must be installed prior to installing the gas piping to the boiler. Failure to properly convert the unit to operate with Propane may result in property damage, serious injury or death.
  • Page 30 │Installation and Operation Instructions Trinity Tx Tx 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. Rigid Gas Line Piping Use only rigid gas line piping within the boiler cabinet.

  • Page 31: Lighting The Boiler

    │ Trinity Tx Tx 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 “de-Air” is no longer displayed on the screen; see Section 17.0 for more details. 1. Turn on power to the Trinity Tx and turn-up the Thermostat(s). The boiler should run through a purge, and combustion should occur. (The control system has a built-in ignition retry, allowing the system to try at least three times, before locking-out.)
  • Page 33 │ Trinity Tx Tx Series Installation and Operation Instructions 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

    Tx Series 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 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. See Table 7-1 and Propane conversion instructions.
  • Page 36 │Installation and Operation Instructions Trinity Tx Tx Series Figure 9-1 Tx Gas Valve and Venturi Assembly Venturi Manifold Pressure Test Port Gas Valve DO NOT Adjust Throttle / Input Adjustment Screw Line Pressure Test Port...

  • Page 37: Boiler And Heating System Piping

    10.0 BOILER AND HEATING SYSTEM PIPING The heat exchanger of the Trinity boiler is designed to attain the highest level of heat transfer in a compact design. To accomplish this, the heating water flows through a series of fin shaped tubes, designed to maximize the heat transfer area.
  • Page 38 Trinity Tx Tx Series Water Chemistry – The installer of the Trinity Tx boiler must consider the condition of the water in the heating system. Ensure the condition of the boiler water falls within the following parameters:  Conductivity – 100 to 300µS/cm (at 25ºC); [TDS 50 to 150ppm or Total Hardness 3 to 9grains/USgal.] ...
  • Page 39 │ Trinity Tx Tx Series Installation and Operation Instructions Near Boiler Piping (Central Heating – CH) Figure 10-1(a) Figure 10-1(b) Tx51-151 (non-Combi) – Fitting Identification Tx51-151 (non-Combi) – CH Piping Boiler Outlet Boiler Inlet 30psi Relief Valve Inlet (factory supplied)
  • Page 40 Boiler System Plumbing The Trinity Tx boiler uses a low mass heat exchanger that requires a minimum rate of forced water circulation any time the burner is operating (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”...
  • Page 41 Pump sizing based on Primary/Secondary plumbing configuration with specified minimum pipe diameter with up to 50’ equivalent length. Model Tx151C incorporates the circulator responsible for generating flow through the boiler, therefore sizing the circulator for boiler flow rate is not necessary. Figure 10-2(a) Tx51 & Tx81 Head Loss Curves Tx51 Tx81 Flow Rate (US gpm)
  • Page 42 Trinity Tx boilers are equipped with an automatic air vent to aid in purging of air from the boiler during the initial fill. This air vent is not intended to be the primary air removal device in the system.
  • Page 43 │ Trinity Tx Tx Series Installation and Operation Instructions Indirect Fired Water Heater – When installed as per Figure 10-4, 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 Tx Series Figure 10-3 Tx51-151 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 10-1(a) and 10-1(b) for boiler fitting identification.
  • Page 45 │ Trinity Tx Tx Series Installation and Operation Instructions Figure 10-4 Tx51-151 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 10-1(c)
  • Page 46 │Installation and Operation Instructions Trinity Tx Tx Series Figure 10-5 Tx151C Primary-Secondary Plumbing (Combi) (Single System Circulator Configuration) Figure illustrates the basic plumbing requirements for a Tx151C (Combi) boiler installation with a single Central Heating circulator. Refer to Figures 10-1(c) and 10-1(d) for boiler fitting identification.
  • Page 47 │ Trinity Tx Tx Series Installation and Operation Instructions Figure 10-6 Tx151C Primary-Secondary Plumbing (Combi) (Multiple System Circulator Configuration) Figure illustrates the basic plumbing requirements for a Tx151C (Combi) boiler installation with a multiple central heating circulators. Refer to Figures 10-1(c) and 10-1(d) for boiler fitting identification.

  • Page 48: Domestic Hot Water (Dhw) Piping - Tx151C (Combi)

    11.0 DOMESTIC HOT WATER (DHW) PIPING – Tx151C (COMBI) The Trinity Tx boiler comes in two versions; non-Combi (Tx51-151) and Combi (Tx151C). Both versions are designed to provide Central Heating and Domestic Hot Water (DHW) heating. To provide DHW heating, the non-Combi version must be installed in combination with an Indirect Fired Hot Water Heater, as in Figures 10-3 and 10-4.
  • Page 49 │ Trinity Tx Tx Series Installation and Operation Instructions Combi DHW Plumbing & Set-up DHW Inlet & Outlet Connections – The Tx151C 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 │Installation and Operation Instructions Trinity Tx Tx Series 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 │ Trinity Tx Tx Series Installation and Operation Instructions 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

    Wiring Connections Electrical rating for the Trinity Tx is 120V / 1 Phase / 60 Hz / 12A. All wiring connections to the Trinity Tx are made at the junction box, located behind the control panel at the bottom of the boiler cabinet, see Figure 12-1.
  • Page 53 │ Trinity Tx Tx Series Installation and Operation Instructions Labeling - Label all wires prior to disconnecting them when servicing controls. Wiring errors can cause improper and dangerous operation. Failure to follow instructions may result in property damage or personal injury.
  • Page 54 │Installation and Operation Instructions Trinity Tx Tx Series Figure 12-2 Field Wiring...

  • Page 55: Cascade Instructions

    │ Trinity Tx Tx Series Installation and Operation Instructions 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.
  • Page 56 │Installation and Operation Instructions Trinity Tx Tx Series 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

    │ Trinity Tx Tx Series Installation and Operation Instructions 14.0 WIRING SCHEMATICS Figure 14-1 Tx Connection Diagram...
  • Page 58 │Installation and Operation Instructions Trinity Tx Tx Series Figure 14-2 Tx Ladder-Logic Diagram...

  • Page 59: Installation Checklist

    │ Trinity Tx Tx Series Installation and Operation Instructions 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.

  • Page 60: Annual Maintenance And Inspection

    │Installation and Operation Instructions Trinity Tx Tx Series 16.0 ANNUAL MAINTENANCE AND INSPECTION This unit must be inspected at the beginning of every heating season by a Qualified Technician. Annual Inspection Checklist  1. Lighting is smooth and consistent, and the combustion fan is noise & vibration free.
  • Page 61 │ Trinity Tx Tx Series Installation and Operation Instructions 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

    │Installation and Operation Instructions Trinity Tx Tx Series 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 │ Trinity Tx Tx Series Installation and Operation Instructions 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 –...
  • Page 64 │Installation and Operation Instructions Trinity Tx Tx Series Table 17-1 User Menu Menu Item Description Current target temperature – displays the current target temperature of the boiler outlet sensor for the 1-01 active demand (DHW or Central Heating). For central heating with outdoor reset, the calculated central heating target temperature will be displayed.
  • Page 65 │ Trinity Tx Tx Series Installation and Operation Instructions 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 Tx151C, to reduce the time required for hot water to reach the fixture. Preheat helps limit the effect of “cold water sandwich” (not applicable for non-combi models Tx51-151). When set to OFF, the boiler does not preheat the DHW. Range = ON/OFF Appliance selection (type) –...
  • Page 67 │ Trinity Tx Tx Series Installation and Operation Instructions 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 │Installation and Operation Instructions Trinity Tx Tx Series Lockouts A lockout is indicated when “Loc” is displayed at the top-left of the screen; the specific lockout code/number is displayed in large text to the right, see Figure 17-5. Some lockouts (e.g. Loc 1 and 2) are considered “hard lockouts”, meaning the lockout cannot be cleared by cycling the power supply off and on;...
  • Page 69 │ Trinity Tx Tx Series Installation and Operation Instructions Fill – Low Water Pressure The Tx boiler is equipped with a water pressure sensor located in the return piping inside the boiler cabinet, see Figure 19-1(d), item 24 for sensor location; the reading from the sensor is displayed on the Main Screen, see Figure 17-2.
  • Page 70 │Installation and Operation Instructions Trinity Tx Tx Series Code Description Excessive Supply Temperature Reading – controller has sensed an excessive temperature reading at the Loc 25 Supply/Outlet sensor; verify proper water circulation, check supply sensor cable, then replace sensor [see Figure 19-1(a), item 15].
  • Page 71 │ Trinity Tx Tx Series Installation and Operation Instructions Code Description DHW Sensor Open – controller has sensed an open circuit at the DHW tank sensor; check wiring to Att 3 terminals 3 and 6 and tank sensor. If no tank sensor is being used, set DHW Mode (setting 2-08) to the appropriate setting;...
  • Page 72 │Installation and Operation Instructions Trinity Tx Tx Series Controller Replacement Instructions This section provides important information necessary for successfully replacing 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;...

  • Page 73: Troubleshooting

    │ Trinity Tx Tx Series Installation and Operation Instructions 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 74 │Installation and Operation Instructions Trinity Tx Tx Series 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 75 │ Trinity Tx Tx Series Installation and Operation Instructions 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 76: Parts List

    │Installation and Operation Instructions Trinity Tx Tx Series 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.
  • Page 77 │ Trinity Tx Tx Series Installation and Operation Instructions Figure 19-1(b) Tx Cabinet Cabinet, Vent and Air-Inlet Parts Figure 19-1(c) Tx Controls Electrical Housing, Controller, and Display Module...
  • Page 78 Gas Valve Adapter, c/w screws and O-ring (all Tx models) 84781 Outlet Sensor, clip-on, c/w retaining clip (all Tx models) O-ring (small), Boiler Inlet/Outlet, 2.76 x 17.72 (Tx51 – pre s/n 72000) 84733 (old) O-ring (medium), Boiler Inlet/Outlet, 3.2 x 19 (Tx81-151 & Tx151C – pre s/n 72000)
  • Page 79 84745 Inlet/Pressure Sensor (all Tx models) 84913 Sight Glass, c/w gasket & snap ring (all Tx models) Heat Exchanger, ASME 2+1 (Tx51 – pre s/n 72000) 84673 (old) Heat Exchanger, ASME 2+1 (Tx51 – post s/n 72000) 85022 Heat Exchanger, ASME 3+1 (Tx81 – pre s/n 72000) 84674 (old) Heat Exchanger, ASME 3+1 (Tx81 –...
  • Page 80 Top (Tx51) Top (Tx81) Top (Tx101) Top (Tx151) Top (Tx151C) 84726 Heat Exchanger Support Rail, c/w screws (Tx51) 84727 Heat Exchanger Support Rail, c/w screws (Tx81 ASME) 84728 Heat Exchanger Support Rail, c/w screws (Tx101 ASME) 84729 Heat Exchanger Support Rail, c/w screws (Tx151 & Tx151C ASME)
  • Page 81 │ Trinity Tx Tx Series Installation and Operation Instructions NOTES...
  • Page 82 │Installation and Operation Instructions Trinity Tx Tx Series NOTES...
  • Page 83 │ Trinity Tx Tx Series Installation and Operation Instructions NOTES...
  • Page 84 NY Thermal Inc. 65 Drury Cove Road Saint John, NB E2H 2Z8 Canada Technical Assistance: 1-800-688-2575 Website: www.nythermal.com Fax: 1-506-432-1135...

Table of Contents