NTI Trinity Lx - WH Series Installation And Operation Instructions Manual

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Trinity Lx - WH

Model Numbers: Lx200WH - Lx800WH

Version Date: 2018-07-11

INSTALLATION AND OPERATION INSTRUCTIONS FOR

TRINITY Lx WATER HEATER

1.0

INTRODUCTION ................................................................................................................ 3

2.0

SPECIFICATIONS .............................................................................................................. 6

3.0

WATER HEATER LOCATION .......................................................................................... 7

4.0

GENERAL VENTING ....................................................................................................... 12

5.0

VENT AND AIR-INTAKE TERMINATION CLEARANCES ........................................ 27

6.0

CONDENSATE DRAIN .................................................................................................... 30

7.0

INSTALLING GAS PIPING .............................................................................................. 31

8.0

LIGHTING THE WATER HEATER ................................................................................ 33

9.0

GAS VALVE AND BURNER SET-UP ............................................................................ 35

10.0 WATER HEATER PIPING ............................................................................................... 42

11.0 LEAD LAG INSTRUCTIONS ........................................................................................... 51

12.0 FIELD WIRING ................................................................................................................. 54

13.0 WIRING SCHEMATICS ................................................................................................... 60

14.0 INSTALLATION CHECKLIST ........................................................................................ 64

15.0 ANNUAL MAINTENANCE AND INSPECTION ........................................................... 65

16.0 PARTS LIST ...................................................................................................................... 67

17.0 TROUBLESHOOTING ..................................................................................................... 79

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.

This Water Heater 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.

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online

NTI # 85236

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Summary of Contents for NTI Trinity Lx - WH Series

Page 1: Table Of Contents
This Water Heater 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. Visit us online NTI # 85236...
Page 2 │Installation and Operation Instructions Lx – WH Series Trinity Lx 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 water heater does not have a pilot.
Page 3: Introduction
1.0 INTRODUCTION General Installation Requirements The installation of your NTI Trinity Lx water heater 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 Lx – WH Series Trinity Lx ATTENTION: LIQUEFIED PETROLEUM (LP) PROPANE The Trinity Lx is factory set to operate with Natural Gas. BEFORE OPERATING WITH PROPANE, the specified LP Conversion Kit and Orifice must be installed to convert the water heater so it will operate safely with LP Propane.
Page 5 │ Lx – WH Series Trinity Lx 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 Lx – WH Series Trinity Lx 2.0 SPECIFICATIONS Table 2-1 General Specifications Lx700WH DESCRIPTION Lx200WH Lx300WH Lx400WH Lx500WH Lx600WH Lx800WH Gas Connection ½” (Female) ¾” (Female) 1” (Male) (inches, NPT) Water Connections 1” (Female) 1-1/4” (Female) 2”...
Page 7: Water Heater Location
│ Lx – WH Series Trinity Lx Installation and Operation Instructions 3.0 WATER HEATER LOCATION In all cases, the Trinity Lx must be installed indoors in a dry location where the ambient temperature must be maintained above freezing and below 100F [38C]. Gas components must be protected from dripping, spraying water, or rain during operation and servicing.
Page 8 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 3-1(a) Closet Installation, Minimum Clearances (Lx200WH) Piping must be CPVC Top 12” [305 mm] 1” [25 mm] clearance for hot water and vent pipes 6” [152 mm] max. above vent opening Ventilation Air Opening Ventilation Air Openings 1 in...
Page 9 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 3-1(c) Closet Installation, Minimum Clearances (Lx500WH-Lx800WH) Model Lx800 Ventilation Air Openings - shown Openings are not required if the appliance area meets the Recommended Clearances in Table 3-1. Top 12”...
Page 10 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 3-2(a) Wall Mounting Installations (Lx200WH)  Failure to follow instructions may Remove the upper wall mount bracket from the result in fire, serious injury, or death. back of the water heater. ...
Page 11 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 3-2(b) Wall Mounting Installations (Lx300WH-Lx400WH)  Failure to follow instructions may While leaving the upper bracket intact (A), result in fire, serious injury, or death. remove the wall mount bracket attached to the bottom-back of the boiler (B).
Page 12: General Venting
│Installation and Operation Instructions Lx – WH Series Trinity Lx 4.0 GENERAL VENTING The Trinity Lx is certified as a “Category IV” water heater 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 13 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Direct Vent Installation (Mandatory for models Lx200WH-Lx400WH) When installed as a Direct Vent water heater 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 14 │Installation and Operation Instructions Lx – WH Series Trinity Lx 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 15 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Near Water Heater Vent/Air-inlet Piping Each Trinity Lx is equipped with a short piece of approved CPVC vent pipe (see Table 4-2 CPVC Vent Pipe Transition Piece). Insert one end into the water heater flue outlet adapter and cement the other to field venting (see Table 4-4 for approved venting material).
Page 16 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 4-2(a) Near Water Heater Venting (CPVC) Figure 4-2(b) Near Water Heater Venting (PVC) Model Lx200WH Model Lx200WH Swing Joint Swing Joint to attain slope in to attain slope in horizontal runs horizontal runs Air Inlet...
Page 17 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 4-4(a) Near Water Heater Venting (CPVC/PVC) Models Lx500WH & Lx600WH Swing Joint to attain slope in horizontal runs Air-Inlet 4” Pipe * Exhaust Vent 4” CPVC Exhaust Vent Air-Inlet Adapter 4”...
Page 18 │Installation and Operation Instructions Lx – WH Series Trinity Lx Vent/Air-inlet Pipe Material Table 4-4 Acceptable Vent and Air-inlet Pipe Material Installation 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 All venting material in...
Page 19 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Vent and Air-inlet Pipe Length Determination Use Table 4-5 to determine the maximum pipe length that can be used. The table calculates sweep, 90º elbows, and 45º elbows at 5 equivalent feet each. Note: model Lx200WH has limitations when operating with Propane Gas (LP).
Page 20 Table 4-6. Kits certified with the Trinity Lx 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 21 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Sidewall Termination - Due to potential moisture loading (build-up) along the exterior wall, sidewall venting may not be the preferred venting option. Refer to Figures 4-8 and 4-10 for roof top venting options. Sidewall Termination Examples –...
Page 22 │Installation and Operation Instructions Lx – WH Series Trinity Lx 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 water heater component failure resulting in flue gas spillage leading to property damage, serious injury or death.
Page 23 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Sidewall Termination Details – Direct Vent Installation Figure 4-9(a) Figure 4-9(b) Two-Pipe Termination (Sidewall) IPEX Concentric Termination (Sidewall) Horizontal 4-12” or greater than 36” Refer to documentation included with termination kit for complete installation instructions.
Page 24 │Installation and Operation Instructions Lx – WH Series Trinity Lx Roof Termination Details – Direct Vent Installation Figure 4-10(a) Figure 4-10(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 25 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 26 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 4-11 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 Air-inlet penetrate.
Page 27: Vent And Air-Intake Termination Clearances
│ Lx – WH Series Trinity Lx Installation and Operation Instructions 5.0 VENT AND AIR-INTAKE TERMINATION CLEARANCES The quick reference table below is to be read in conjunction with the numbered notes as indicated, Figures 5-1 through 5-6, and the Venting Rules and Guidelines in Section 4.0. The instructions detailed in this section are a combination of Trinity Lx specific and National Gas Code restrictions.
Page 28 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 5-1 Termination Clearances Quick Reference Diagram...
Page 29 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 5-2 Sidewall Termination Clearances (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 30: Condensate Drain
│Installation and Operation Instructions Lx – WH Series Trinity Lx 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 that condensate does not collect in the venting system; therefore, all exhaust piping must slope back to the water heater a minimum 1/4”...
Page 31: Installing Gas Piping
Ensure that:  The gas line connection to the water heater does not apply any weight to the gas valve. NTI recommends using approved flexible gas piping (if acceptable by local codes) to connect the water heater to the gas supply (See Figure 7-1 for details).
Page 32 │Installation and Operation Instructions Lx – WH Series Trinity Lx Strain on the gas valve and fittings may result in vibration, premature component failure and leakage and may result in a fire, explosion, property damage, serious injury or death. Flexible gas piping cannot be used within the water heater cabinet and cannot pass through the cabinet wall, use rigid piping as shown in Figure 7-1.
Page 33: Lighting The Water Heater
│ Lx – WH Series Trinity Lx Installation and Operation Instructions 8.0 LIGHTING THE WATER HEATER 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 water heater, ensure all aspects of the installation are complete and in conformance with the instructions provided in this manual, including the Vent/Air-Intake, Condensate Drain, and System Water Piping.
Page 34 If the unit fails to light consistently and smoothly, contact NTI for technical assistance at 1-800-688-2575. Never allow the water heater to operate if the ignition or operation of the burner is rough or erratic.
Page 35: Gas Valve And Burner Set-Up
│ Lx – WH Series Trinity Lx Installation and Operation Instructions 9.0 GAS VALVE AND BURNER SET-UP The Trinity Lx gas valve must be set-up by a licensed Gas Technician. Improper set-up may result in incorrect operation, damage to components or property, injury or death. Gas Line Pressure The water heater gas valve is equipped with a line pressure test port;...
Page 36 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 9-1 Gas Valve and Venturi Assembly (Lx200WH & Lx300WH) Lx200WH Orientation Illustrated Gas In Lx200WH Orientation Illustrated Lx300WH Assembly Orientation Clockwise Rotated Venturi Gas Valve Line Pressure Test Port Air-inlet Throttle/Input Adjustment Screw...
Page 37 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 9-3 Gas Valve and Venturi Assembly (Lx500WH) Gas Valve Line Pressure Test Port Gas In Throttle/Input Adjustment Screw Manifold Pressure Test Port Figure 9-4 Gas Valve and Venturi Assembly (Lx600WH-Lx800WH) Throttle/Input Gas Valve Adjustment Screw...
Page 38 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 39 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Flue Gas Analysis and Adjustment Each Trinity Lx is factory set to operate with Natural Gas, for water heaters field converted to operate with Propane Gas, a flue gas analysis and adjustment is mandatory. See Table 7-1 and propane conversion instructions.
Page 40 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 9-6 Flue Gas Sampling Using Test Port (Lx200WH) Test Port Combustion Analyzer FLUE GAS TEST PORT PLUG - Remove test port plug to perform flue gas analysis. Re-install plug once sampling completed to prevent flue gas leakage during appliance operation.
Page 41 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 9-8 Flue Gas Sampling Using Test Port (Lx500WH & Lx600WH) Combustion Analyzer FLUE GAS TEST PORT PLUG Remove test port plug to perform flue gas analysis. Re-install plug once sampling completed to prevent flue gas leakage during appliance Test Port...
Page 42: Water Heater 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 43 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Safe Temperatures for Potable Water Two factors used to determine safe hot water temperatures are Legionella and scalding. Potable water needs to be stored at temperatures hot enough to limit the growth of Legionella, yet be cool enough to prevent scalding. Since both hazards present a potential risk to the user, they must be monitored and controlled.
Page 44 │Installation and Operation Instructions Lx – WH Series Trinity Lx Thermostatic Mixing Valve - When the system requires water at temperatures higher than required for other uses, such as high temperature applications typically greater than C (115 F), a means such as a thermostatic mixing valve shall be installed to temper the water for those uses in order to reduce scald hazard potential.
Page 45 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Near Water Heater Plumbing Pressure Relief Valve - A Pressure Relief Valve is factory supplied with each unit and must be field installed at the water heater outlet in the vertical position, as shown in Figures 10-1(a) and (b), with the drain pipe outlet exiting the side of the pressure relief valve horizontally and elbowing down.
Page 46 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 10-1(a) Near Water Heater Piping (Lx200WH-Lx400WH) Pressure Relief Valve discharge to floor drain Inlet Safety Flow Switch Trim-able paddle Outlet Pressure Gauge Pressure Relief Valve Near Water Heater tees and fittings Figure 10-1(b) Near Water heater Piping (Lx500WH-Lx800WH) To Boiler and...
Page 47 Locate the flow switch in series with the water heater and in accordance with the instructions provided with the safety flow switch. NTI recommends a safety flow switch with an activation point no lower than the flow rate specified in Table 10-3.
Page 48 │Installation and Operation Instructions Lx – WH Series Trinity Lx Water Heater Circulator - The Lx water heater is equipped with three 120VAC pump outputs (Pump A, B and C). Use only Pump Output B for the Water Heater Circulator. Note that bronze or stainless steel circulators are required for potable water systems.
Page 49 Lx controller based on controller settings. Tank sensor MUST be used in conjunction with a DHW temperature safety shutoff switch. NTI recommends using P/N 84632 (Tank Sensor w/integrated safety switch). Failure to provide such a switch may result in property damage, serious injury to occupants, or possibly death.
Page 50 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 10-2 All Models Stand Alone Water Heater Plumbing Configuration...
Page 51: Lead Lag Instructions
│ Lx – WH Series Trinity Lx Installation and Operation Instructions 11.0 LEAD LAG INSTRUCTIONS Multiple Water Heater Applications The Lx controller has the internal capacity to stage or Lead-Lag up to 8 water heaters configured in a cascade. This Lead-Lag capability allows a designated “Master” water heater to communicate with and effectively control each water heater in a multiple water heater system.
Page 52 │Installation and Operation Instructions Lx – WH Series Trinity Lx Tank Sensor – when operating in a cascade system, the water heater controls do not support the use of a tank sensor; a tank thermostat (switch) must be used. Table 11-1 Minimum Pipe Sizes for Multiple Water Heater Applications # of Lx200WH Lx300WH...
Page 53 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 11-1 All Models Multiple Water Heater Lead-Lag Plumbing Configuration...
Page 54: Field Wiring
│Installation and Operation Instructions Lx – WH Series Trinity Lx 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 water heater 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 55 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 12-1(a) Line Voltage Field Wiring (Lx200WH-Lx400WH) PUMP B 120VAC SUPPLY_ Line Neutral Gnd__ SERVICE SWITCH (field supplied) Table 12-1 Line Voltage Field Connections Connection Location Description 120VAC Hot - Location for connecting line voltage of the power supply. Note most installation codes require the installation of a service switch to break line voltage to the (120VAC) appliance.
Page 56 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 12-1(b) Line Voltage Wiring (Lx500WH-Lx800WH) Table 12-1(b) Line Voltage Field Connections (Lx500WH-Lx800WH) Connection Location Description 120VAC Hot - Location for connecting line voltage of the power supply. Note most L1 (120VAC) installation codes require the installation of a service switch to break line voltage to the appliance.
Page 57 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Low Voltage Connections The Trinity Lx low voltage junction box is located in the lower left corner of the water heater cabinet on Lx200WH models and can be accessed by removing the front door of the water heater, followed by the removal of the low voltage junction box cover.
Page 58 May be connected to a BMS, maximum capacity of 0.63Amps at 24VAC. Notes 1 For applications requiring a High Gas Pressure Switch, see supplemental instructions included with NTI High Gas Pressure Switch Kit, P/N 84094. Note: this is the only High Gas Pressure Switch that has been tested with the unit and preapproved for field installation within the appliance cabinet.
Page 59 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Low Voltage Terminals - Terminals 2 and 3 (R) have 24VAC potential from the internal transformer. Do not connect power from these terminals to any other terminal other than terminals 4, 5 and 6 [LIM, CH1, and CH2 (LL)].
Page 60: Wiring Schematics
│Installation and Operation Instructions Lx – WH Series Trinity Lx 13.0 WIRING SCHEMATICS Figure 13-1(a) Connection Diagram (Lx200WH-Lx400WH)
Page 61 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 13-1(b) Ladder/Logic Diagram (Lx200WH-Lx400WH)
Page 62 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 13-2(a) Connection Diagram (Lx500WH-Lx800WH)
Page 63 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 13-2(b) Ladder/Logic Diagram (Lx500WH-Lx800WH)
Page 64: Installation Checklist
│Installation and Operation Instructions Lx – WH Series Trinity Lx 14.0 INSTALLATION CHECKLIST Installation  1. If operating on Propane Gas, convert water heater using appropriate Kit number. See Table 7-1.  2. Locate the water heater in accordance with Section 3.0 of this manual. ...
Page 65: Annual Maintenance And Inspection
│ Lx – WH Series Trinity Lx Installation and Operation Instructions 15.0 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 66 │Installation and Operation Instructions Lx – WH Series Trinity Lx 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 door and at the back of the combustion chamber contains Refractory Ceramic Fibers and should not be handled without personal protective equipment.
Page 67: Parts List
│ Lx – WH Series Trinity Lx Installation and Operation Instructions 16.0 PARTS LIST For a list of parts that corresponds to the item numbers in the bubbles, refer to Table 16-1. Note that 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 68 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 16-2 Heat Exchanger, Gas Valve, Blower and Burner Assembly (Lx200WH) Figure 16-3 Electrical Housing, Controller, and Display Module (Lx200WH-Lx400WH)
Page 69 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 16-4 Cabinet, Vent and Air-Intake Parts (Lx300WH & Lx400WH)
Page 70 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 16-5 Heat Exchanger, Gas Valve, Blower and Burner Assembly (Lx300WH-Lx400WH)
Page 71 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Commercial Models (Lx500WH-Lx800WH) Figure 16-6 Cabinet, Vent and Air-inlet Parts (Lx500WH-Lx800WH)
Page 72 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 16-7 Heat Exchanger, Gas Valve, Blower and Burner Assembly (Lx500WH)
Page 73 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Figure 16-8 Heat Exchanger, Gas Valve, Blower and Burner Assembly (Lx600WH-Lx800WH)
Page 74 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 16-9 Electrical Housing, Controller, and Display Module (Lx500WH-Lx800WH) 58 wal Table 16-1 Parts List: Trinity Lx Item Part # Models Description 82657 Premix burner 135.8 (Lx100-150; not Lx150E) 82658 150E, 200 Premix burner, 200.6 (Lx150E, Lx200) 84207...
Page 75 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Item Part # Models Description 81994 CVI Venturi 51 (Lx300) 82990 CVI Venturi (Lx400) 84013 600–800 CVI Venturi (Lx600-800) 82650 150, 150E, 200 CVI 5.20mm Orifice #45.900.444.107B (Lx150-200) 84157 CVI 6.20mm Orifice (Lx300) 82993 400 (NG)
Page 76 │Installation and Operation Instructions Lx – WH Series Trinity Lx Item Part # Models Description 83996 700, 800 Condensate Drain Tube (Lx700-800) 83112 All Models Trinity Divider Plate Insulation c/w Washer & Screw (Lx Series) 82770 150–500 Burner Door Viton Gasket (Lx150-500) 84136 600–800 Burner Door Viton Gasket (Lx600-800)
Page 77 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Item Part # Models Description 83876 150, 150E, 200 Electrical J-box Cover R1, Left (Lx100-200) 83872 All Models Barrier Strip, Line Voltage (Lx Series) 83877 150, 150E, 200 Electrical J-box, Line Voltage (Lx150-200) 83707 All Models Ignition Coil Q652B1006/B (Lx Series)
Page 78 │Installation and Operation Instructions Lx – WH Series Trinity Lx Item Part # Models Description 84146 700, 800 Rear Top (Lx700-800) 83961 300, 400 Fuel-Air Metallic Tubing with Ends (Lx400) 84379 Fuel-Air Metallic Tubing with Ends (Lx500) 84147 600–800 Fuel-Air Metallic Tubing with Ends (Lx600-800) 83915 300, 400 High-Vent Pressure Switch, AFS460-367 (Lx300-400)
Page 79: Troubleshooting
│ Lx – WH Series Trinity Lx Installation and Operation Instructions 17.0 TROUBLESHOOTING Observe the following precautions when servicing the water heater. Failure to comply with these may result in fire, property damage, serious injury or death. Servicing the Water heater ...
Page 80 │Installation and Operation Instructions Lx – WH Series Trinity Lx Figure 17-1(a) Lx200WH-Lx400WH Figure 17-1(b) Lx500WH-Lx800WH Control Panel Fuse Locations Control Panel Fuse Location Fuse “A” 3AG 7A 250V Fuse “C” ATO Fast-Acting 2A 32V Auto Blade Type Fuse “B” 3AG 7A 250V Fuse “A”...
Page 81 │ Lx – WH Series Trinity Lx Installation and Operation Instructions User Interface (Touch-screen Display) A blank screen does not necessarily indicate a problem; the display may be configured to automatically blank the screen after a pre-set interval. Simply touch the screen to activate it. Confirm that 120V power is being supplied to the water heater.
Page 82 │Installation and Operation Instructions Lx – WH Series Trinity Lx Summary and Diagnostics Display – The Trinity Lx controller and Touchscreen display provides detailed operational and diagnostic information for aid in troubleshooting. When power is applied to the water heater the initial page displayed is the Summary page.
Page 83 Incorrect air switch setting Contact NTI technical support. Faulty air proving switch If venting and air inlet are clear, temporarily jumper the air switch. If the unit lights and operates smoothly –...
Page 84 Tripped Thermal Fuse (Lx500-800 Check Thermal Fuse on the back of the heat only) exchanger (accessed from the rear of the cabinet). If tripped contact NTI. Tripped High Vent Pressure Switch The high vent pressure switch will trip when the (Lx500-800 only) combustion chamber is blocked or venting is too restrictive.
Page 85 │ Lx – WH Series Trinity Lx Installation and Operation Instructions PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Faulty sensor Check resistance of sensor and compare to thermistor resistance chart, see Table 17-2.  Verify that 4-position Molex connector on Hold 92 – Outlet sensor fault Sensor disconnected wiring harness is securely attached to mating connector on outlet sensor.
Page 86 Condensation or other foreign matter may be obstructing the tubing, preventing the switch from sensing differential pressure caused by air flow through the metering elbow. Incorrect air switch setting Contact NTI technical support. Blown fuse " " Check Fuse Inoperative CH and/or DHW Blown fuse "...
Page 87 │ Lx – WH Series Trinity Lx Installation and Operation Instructions PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION  Check Power LED on controller. Blower operating at high No 24VAC to controller  Check Fuse speed while burner off " "  With an AC voltmeter measure voltage at terminals J8 1 &...
Page 88 │Installation and Operation Instructions Lx – WH Series Trinity Lx Table 17-3 Hold and Lockout Codes Code Description Note Internal fault: Safety relay test failed due to feedback ON Lockout Internal fault: Safety relay test failed due to safety relay OFF Lockout Internal fault: Safety relay test failed due to safety relay not OFF Lockout...
Page 89 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Table 17-3 Hold and Lockout Codes Code Description Note Interrupted Airflow Switch OFF Hold Interrupted Airflow Switch ON Hold ILK OFF Hold ILK ON Pilot test hold Hold Wait for leakage test completion Hold Input power frequency mismatch Lockout...
Page 90 │Installation and Operation Instructions Lx – WH Series Trinity Lx Table 17-3 Hold and Lockout Codes Code Description Note Light off rate proving failed Lockout Purge rate proving failed Lockout High fire switch OFF Hold High fire switch stuck ON Hold Low fire switch OFF Hold...
Page 91 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Table 17-3 Hold and Lockout Codes Code Description Note Safety relay ON at safe start check Lockout 179-180 RESERVED Invalid Blocked condensate enable setting Disabled Invalid J7-1 configuration, both LFS and Blocked condensate Disabled Invalid J7-2 configuration, both HFS and Flap valve Disabled...
Page 92 │Installation and Operation Instructions Lx – WH Series Trinity Lx Table 17-3 Hold and Lockout Codes Code Description Note Invalid Stack limit set point setting Lockout Invalid Modulation output setting Lockout Invalid CH demand source setting Lockout Invalid Delta T limit delay setting Lockout Invalid Pressure sensor type setting Lockout...
Page 93 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Table 17-4 Alert Codes Code Description Invalid Factory Range PCB was detected Invalid range PCB record has been dropped EEPROM lockout history was initialized Switched application annunciation data blocks Switched application configuration data blocks Configuration was restored from factory defaults Backup configuration settings was restored from active configuration...
Page 94 │Installation and Operation Instructions Lx – WH Series Trinity Lx Table 17-4 Alert Codes Code Description Safety processor brown-out reset occurred Application processor watchdog reset occurred Application processor brown-out reset occurred Safety processor watchdog reset occurred Alarm was reset by the user at the control Burner control firing rate was >...
Page 95 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Table 17-4 Alert Codes Code Description Min modulation rate was < absolute min rate Min modulation rate was invalid, % vs. RPM Manual rate was invalid, % vs. RPM Slow start enabled, but forced rate was invalid Analog output hysteresis was invalid Analog modulation output type was invalid...
Page 96 │Installation and Operation Instructions Lx – WH Series Trinity Lx Table 17-4 Alert Codes Code Description DHW ON hysteresis was invalid DHW hysteresis step time was invalid DHW sensor type was invalid Inlet sensor type was invalid for DHW Outlet sensor type was invalid for DHW DHW storage OFF hysteresis was invalid DHW storage ON hysteresis was invalid DHW modulation sensor type was invalid...
Page 97 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Table 17-4 Alert Codes Code Description Incompatible Lead Lag slave was discovered No base load rate was set for Lead Lag slave Lead Lag slave unable to fire before demand to fire delay expired Adding Lead Lag slave aborted due to add requirement change No Lead Lag slaves available to service demand No Lead Lag active service was set due to demand priority conflicts...
Page 98 │Installation and Operation Instructions Lx – WH Series Trinity Lx Table 17-4 Alert Codes Code Description STAT may not be a DHW demand source when Remote Stat is enabled No DHW anticondensation setpoint was configured No CH anticondensation setpoint was configured STAT may not be a CH demand source when Remote Stat is enabled CH 4mA water temperature setting was invalid CH 20mA water temperature setting was invalid...
Page 99 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Table 17-4 Alert Codes Code Description Run was terminated due to fan failure Abnormal Recycle: Fan failed during Drive to Purge Rate Abnormal Recycle: Fan failed during Measured Purge Time Abnormal Recycle: Fan failed during Drive to Light off Rate Abnormal Recycle: Fan failed during Pre-Ignition test Abnormal Recycle: Fan failed during Pre-Ignition time...
Page 100 │Installation and Operation Instructions Lx – WH Series Trinity Lx Table 17-4 Alert Codes Code Description Internal error: PID iteration frequency was invalid Internal error: Demand-Rate interval time was invalid Internal error: Factory calibration parameter for modulation was invalid Internal error: CH PID P-scaler was invalid Internal error: CH PID I-scaler was invalid Internal error: CH PID D-scaler was invalid Internal error: DHW PID P-scaler was invalid...
Page 101 │ Lx – WH Series Trinity Lx Installation and Operation Instructions Table 17-4 Alert Codes Code Description Internal error: Request to write PM status was invalid Internal error: PM parameter address was invalid Internal error: PM safety parameter address was invalid Internal error: Invalid record in lockout history was removed Internal error: EEPROM write buffer was full Internal error: Data too large was not written to EEPROM...
Page 102 │Installation and Operation Instructions Lx – WH Series Trinity Lx Table 17-4 Alert Codes Code Description Disagreement on number of interacting controls NOTES...
Page 103 │ Lx – WH Series Trinity Lx Installation and Operation Instructions...
Page 104 │Installation and Operation Instructions Lx – WH Series Trinity Lx 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...

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