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NTI TRX085 Installation, Start-Up, Maintenance, Parts, Warranty

Residential condensing gas boiler
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Installation
Start-Up
Maintenance
Parts
Warranty
TRX085
TRX120
TRX110C
TRX150C models
Revision Date 6.25.20
Residential Condensing Gas Boiler
Heat Exchanger Bears the ASME "H" Stamp
DANGER
THIS MANUAL MUST ONLY BE USED BY A QUALIFIED INSTALLER / SERVICE
TECHNICIAN. READ ALL INSTRUCTIONS IN THIS MANUAL BEFORE
INSTALLING. PERFORM STEPS IN THE GIVEN ORDER. FAILURE TO DO SO
COULD RESULT IN SUBSTANTIAL PROPERTY DAMAGE, SEVERE PERSONAL
INJURY, OR DEATH.
WARNING
Improper installation, adjustment, alteration, service, or maintenance could
void product warranty and cause property damage, severe personal injury,
or death.
California Proposition 65 Warning: This product contains chemicals known
to the State of California to cause cancer, birth defects, or other reproductive
harm.
NOTICE
The manufacturer reserves the right to make product changes or updates without
notice and will not be held liable for typographical errors in literature.
The surfaces of these products contacted by potable (consumable) water contain less
than 0.25% lead by weight as required by the Safe Drinking Water Act, Section 1417.
TRX
TRX

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  • Page 1 Installation Start-Up Maintenance Residential Condensing Gas Boiler Parts Warranty TRX085 TRX120 TRX110C TRX150C models Heat Exchanger Bears the ASME “H” Stamp DANGER THIS MANUAL MUST ONLY BE USED BY A QUALIFIED INSTALLER / SERVICE TECHNICIAN. READ ALL INSTRUCTIONS IN THIS MANUAL BEFORE INSTALLING.
  • Page 2 WARNING WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. • Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. WHAT TO DO IF YOU SMELL GAS •...
  • Page 3 SPECIAL ATTENTION BOXES Installation should be made in accordance with the regulations of the Authority Having Jurisdiction, local code authorities, and utility The following defined terms are used throughout this companies which pertain to this type of water heating equipment. manual to bring attention to the presence of hazards of Authority Having Jurisdiction (AHJ) –...
  • Page 4 In accordance with Section 325 (f) (3) of the Energy Policy and work to shutoff the fuel supply when the system water temperature Conservation Act, NTI has provided this boiler with multiple reaches the preset operating temperature; and they cause a safety...

  • Page 5: Table Of Contents

    Table of Contents Part 8 - Gas Connections Part 1 - General Safety Information A. Gas Pipe Sizing Tables 1. Gas Pipe Sizing A. Operation and Installation Warnings 2. Natural Gas Pipe Sizing B. Improper Combustion 3. LP (Liquid Propane) Gas Pipe Sizing C.

  • Page 6: Operation And Installation Warnings

    Part 1 - General Safety Information This boiler is approved for indoor installations only and is not intended WARNING for use as a pool heater. Clearance to combustible materials: 0” top, bottom, sides, and back. Boiler must have room for service: 18” front, This boiler must be installed by a qualified service technician.

  • Page 7: Improper Combustion

    D. When Servicing the Boiler DO NOT alter or modify the appliance or appliance controls. WARNING Altering any NTI boiler with parts not manufactured by NTI WILL INSTANTLY VOID the boiler warranty and could result in property damage, personal injury, or death.

  • Page 8: And Dhw Loop Water Chemistry Requirements

    Potable water is defined as drinkable CH applications. water supplied from utility or well water in compliance with EPA NOTE: NTI DOES NOT WARRANT THE BOILER AGAINST FREEZE-RELATED secondary maximum contaminant levels (40 CFR Part 143.3). If DAMAGE.

  • Page 9: Water Temperature Adjustment And Scalding

    CAUTION I. High Elevation Installations WARNING On TRX085 / TRX120 Models ONLY If the boiler is to be used only in Heating Mode (not connected to an indirect water heater), the electrical connection of the Natural gas at high elevation might contain less heating value than...

  • Page 10: Part 2 - Before You Start

    Installation Quick Start Guide Replacement parts manual Template LP Gas Conversion Kit Outdoor sensor Kit Spare Parts Piping Adapter Kit - TRX085 Exploded view Residential Condensing Gas Boiler User’s 14-a 1 + 1 Gas Adapter 3/4” + 1 gas flat...
  • Page 11 Part 2 - Before You Start How the Boiler Operates TRX150C / TRX120 TRX condensing technology intelligently delivers hydronic heating while maximizing efficiency. Outlined below are system features and operation: Stainless Steel Heat Exchanger The highly efficient stainless steel heat exchanger is designed to extract all available heat from the supply line before it is exhausted.

  • Page 12: Optional Equipment

    Protects the boiler from damage in low flow conditions. Internal ECM Pump The internal ECM Pump uses less electricity than standard pumps, providing high performance operation. B. Optional Equipment Optional equipment available from NTI (and Part #): • System Sensor (84010) • 3” PVC Concentric Vent Kit (84634) •...

  • Page 13: Part 3 - Prepare The Boiler For Installation

    Part 3 - Prepare the Boiler for Installation CAUTION CAUTION The service life of the boiler’s exposed metallic surfaces, such COLD WEATHER HANDLING - If the boiler has been stored in a as the casing, as well as internal surfaces, such as the heat very cold location (BELOW 0 F) before installation, handle with exchanger, are directly influenced by proximity to damp and salty...

  • Page 14: Leveling

    Part 3 - Prepare the Boiler for Installation NOTE: For closet installations, a combustible door or removable NOTE: When installing in a zero clearance location, it may not be panel is acceptable front clearance. A 3” minimum clearance must be possible to read or view some product labeling.

  • Page 15: Wall Mounting Considerations

    Part 3 - Prepare the Boiler for Installation Part 1 - General Safety Information D. Wall Mounting Considerations These boilers are wall mounted. Use only the wall mounting instructions included with this boiler. ” ,4 m (4 06 Ensure the wall that the boiler is intended to be mounted on is th ick ar d x 1/...

  • Page 16: Mounting To A Wood Studded Wall

    Part 1 - General Safety Information Part 3 - Prepare the Boiler for Installation 2. Mounting to a Wood Studded Wall CAUTION If the boiler is not installed upright, vertically plumb, and level, improper and unsatisfactory operation may occur, causing excessive condensation build-up, nuisance fault codes, and unnecessary ”...

  • Page 17: Residential Garage And Closet Installations

    Part 3 - Prepare the Boiler for Installation Part 1 - General Safety Information Be sure to locate the boiler such that the exhaust vent and intake F. Residential Garage and Closet Installations piping can be routed through the building and properly terminated. Different vent terminals can be used to simplify and eliminate multiple CAUTION penetrations in the building structure (see Optional Equipment in...

  • Page 18: Prevent Combustion Air Contamination

    Part 1 - General Safety Information Part 3 - Prepare the Boiler for Installation property owner to secure the service of qualified licensed professionals for the installation of hard wired carbon monoxide detectors. a. In the event that the vented gas fueled appliance is installed in a crawl space or attic, the hard wired carbon monoxide detector with alarm and battery back-up shall be installed on the next adjacent floor level.

  • Page 19: Technical Specifications

    Part 3 - Prepare the Boiler for Installation K. Technical Specifications Model TRX085 TRX120 TRX110C TRX150C Type Boiler Combi Installation Indoor, Wall Hung, Fully Condensing Space Heating 9,400 / 85,000 13,200 / 120,000 11,200 / 106,000 13,200 / 120,000 Minimum / Maximum Input (Btu/Hr)
  • Page 20 (87,6 mm) (87,6 mm) (87,2 mm) (150 mm) 15-5/16” (390 mm) Figure 10 - Boiler Dimensions - NOTE: All Dimensions Are Approximate Model TRX085 TRX120 Model TRX110C TRX150C A - Central Heating Supply 1” A - Central Heating Supply 1”...
  • Page 21 Part 3 - Prepare the Boiler for Installation TRX085 - TRX120 Pressure relief valve Circulation Pump with auto air vent Air purge valve Water pressure switch Boiler outlet temperature sensor Modulating Fan Air pressure switch Boiler inlet temperature sensor Flue gas temperature sensor...
  • Page 22 Part 3 - Prepare the Boiler for Installation TRX110C - TRX150C Pressure relief valve CH circuit filter Air purge valve Circulation Pump with auto air vent Boiler outlet temperature sensor DHW Flow switch Air pressure switch Water pressure switch Flue gas temperature sensor Modulating Fan Main heat exchanger Boiler inlet temperature sensor...
  • Page 23 Part 3 - Prepare the Boiler for Installation TRX085 - TRX120 TRX110C - TRX150C °F °F Pressure relief valve Air purge valve Boiler outlet temperature sensor Air pressure switch Flue gas temperature sensor Main heat exchanger Flame detection electrode Silencer...

  • Page 24: Part 4 - Water Piping

    An automatic air vent would cause air to leave water. NTI offers indirect water heaters in a wide range of gallon sizes the system, resulting in improper operation of the expansion tank.
  • Page 25 Connect the 3/4” DHW inlet and outlet pipes. A shut-off valve between the city water supply and DHW inlet is recommended for ease of service. NTI offers threaded 3/4” DHW tankless isolation valves with a DHW pressure relief valve for ease of installation and future service.

  • Page 26: Internal Circulation Pump

    (ex: due to the response of thermostatic valves or zone valves). The by-pass valve is located: - in the left hydraulic block for TRX085 and TRX120. - in the right hydraulic block , behind the three-way valve, for TRX110C and TRX150C.
  • Page 27 Part 4 - Water Piping DHW Loop (Combi Models) CH Loop The DHW piping must be provided with a DHW pressure relief valve that This boiler is provided with a CH pressure relief valve that complies with complies with local codes, but not less than valves certified as meeting the ANSI/ASME Boiler and Pressure Vessel Code, Section IV (Heating the requirements of Relief Valves for Hot Water Supply Systems, ANSI Boilers).

  • Page 28: Air Elimination Device

    Part 4 - Water Piping WARNING J. Applications* CAUTION Do not thread a cap or plug into the relief valve or relief valve line under any circumstances! Explosion and property damage, serious injury, or death may result. In mixed temperature applications, a mixing valve is required for the protection of low temperature loops.
  • Page 29 Primary/Secondary Piping Shown Figure 23 - TRX085 / TRX120 with Single Central Heating Circulator NOTE: In piping applications utilizing a single zone, it is recommended NOTES: that the installer use flow / check valves with weighted seats at or near 1.
  • Page 30 Failure to comply with these instructions could result in property damage, Figure illustrates the basic plumbing requirements for a TRX085 / TRX120 severe personal injury, or death. boiler installation without an external Central Heating circulator; the NOTES: boiler’s internal circulator delivers flow to the heating system.
  • Page 31 Primary/Secondary Piping is Required Figure 25 - TRX085 / TRX120 with Multiple Central Heating Circulators NOTES: NOTE: In piping applications utilizing a single zone, it is recommended 1. This drawing is meant to show system piping concept only.
  • Page 32 Part 4 - Water Piping Primary/Secondary Piping Shown Figure 26 - TRX110C / TRX150C with Single Central Heating Circulator NOTE: In piping applications utilizing a single zone, it is recommended NOTES: that the installer use flow / check valves with weighted seats at or near 1.
  • Page 33 Part 4 - Water Piping WARNING For direct (not primary / secondary) piping applications, the expan- sion vessel must be placed on the supply side of the boiler as illus- trated. Placement of flow resticting devices, such as check valves, is prohibited between the boiler return and the expansion vessel.
  • Page 34 Part 4 - Water Piping CAUTION In mixed temperature applications, a mixing valve is required for the protection of low temperature loops. Primary/Secondary Piping is Required Figure 28 - TRX110C / TRX150C with Multiple Central Heating Circulators NOTES: NOTE: In piping applications utilizing a single zone, it is recommended 1.

  • Page 35: Floor Drying Function

    Part 4 - Water Piping K. Floor Drying Function The Floor Drying Function is a special function that allows the installer, through a dedicated heating cycle, to use the boiler for drying a freshly poured radiant floor during a floor system installation. The installer can set parameter 2.7.4 (Floor Drying Cycle) and choose the cycle‘s operation (Functional Heating, Curing Heating, a combination of Functional and Curing Heating, or Manual Heating).

  • Page 36: Part 5 - Venting

    Part 5 - Venting DANGER The boiler must be vented as detailed in this section. Ensure exhaust vent and intake piping complies with these instructions regarding vent system. Inspect finished exhaust vent and intake piping thoroughly to ensure all joints are well secured, airtight, and comply with all applicable code requirements, as well as the instructions provided in this manual.

  • Page 37: Approved Materials For Exhaust Vent And Intake Pipe

    Part 5 - Venting B. Approved Materials for Exhaust Vent and Intake Pipe Standards for Installation In: Item Material United States Canada Pipe and Fittings Approved for Intake ONLY ABS* ANSI/ASTM D2661 ANSI/ASTM D2661 PVC Schedule 40/80 UL-1738 or ANSI/ASTM D1785 PVC-DWV Schedule 40/80 UL-1738 or ANSI/ASTM D2665 UL-1738 or ULC-S636...

  • Page 38: Exhaust Vent And Intake Pipe Location

    Part 5 - Venting D. Exhaust Vent and Intake Pipe Location INSIDE CORNER DETAIL FIXED OPERABLE CLOSED FIXED CLOSED OPERABLE LP-179-CC 03/28/17 Exhaust Vent Terminal Intake Pipe Terminal Area Where Intake Terminal Is Not Permitted Figure 29 - Exit Terminals for Direct Vent Systems - ANSI Z223.1 / NFPA 54 for US and CAN/CSA B149.1 for Canada DESCRIPTION CANADA Clearance above grade, veranda, porch, deck, or balcony...

  • Page 39: Exhaust Vent And Intake Pipe Sizing

    Part 5 - Venting E. Exhaust Vent and Intake Pipe Sizing When preparing pipe for installation: 1. The factory ready exhaust vent and intake air pipe diameter is 2”. • Ensure cuts are square. The vent diameter can be increased to 3” by installing a reducing •...

  • Page 40: Exhaust Vent And Intake Pipe Installation

    Part 5 - Venting 2. If using the right side connection, remove the gear clamp from the G. Exhaust Vent and Intake Pipe Installation left side connection and install it on the right side. See Figure 33. WARNING WARNING All joints of positive pressure vent systems must be sealed completely You must cut out the plastic on the air intake connection being used to prevent leakage of flue products into the living space.
  • Page 41 Vent Option Availability Vent Supplier Vent Material Description Figure Size Part Number Compatibility Roof Wall 2” 196984 (NTI p/n 85062) 36, 40 IPEX Low Profile (Wall) 3” 196985 (NTI p/n 84357) 36, 40 2” 196125 37, 41, 48, 52 PVC/CPVC IPEX Concentric...

  • Page 42: Applications

    Part 5 - Venting H. Applications 1. Direct Vent Installation of Exhaust and Intake If installing a direct vent option, combustion air must be drawn from the outdoors directly into the boiler intake, and exhaust must terminate outside. There are three basic direct vent options detailed in this manual: 1.
  • Page 43 Part 5 - Venting Sidewall Venting Options - Direct Vent Installation Low Profile Termination Two Pipe Termination WARNING WARNING Exhaust must terminate a minimum of 18” above the air intake Exhaust must terminate a minimum of 18” above the air intake termination.
  • Page 44 Part 5 - Venting Sidewall Venting Options - Direct Vent Installation Low Profile Termination Two Pipe Termination WARNING 4 in min. Refer to documentation included with termination kit for complete installation instructions. Gas Vent Gas Vent Directly Directly Below Keep Free of Below Keep Obstructions Free of...
  • Page 45 Part 5 - Venting Snorkel Venting (Two Pipe Sidewall Venting Terminations Venting Below Grade Beneath an Overhang) For installations that exit the wall below grade: Excavate the site to a point where the pipes are to exit as shown in Figure 44. Ensure the wall is fully sealed where the pipes penetrate.
  • Page 46 Part 5 - Venting Roof Venting Options - Direct Vent Installation Unbalanced Termination (Roof Exhaust / Sidewall Intake) Two Pipe Termination WARNING WARNING Exhaust must terminate a minimum of 18” above the air intake Exhaust must terminate a minimum of 12” above snow level. See Figure termination.
  • Page 47 Part 5 - Venting Roof Venting Options - Direct Vent Installation Unbalanced Venting - Roof Exhaust Termination Two Pipe Termination WARNING Figure illustrates two options for exhaust termination only. Neither vent pipe illustrated is intended for combustion air intake. 4 in min. Figure 50 - Two Pipe Roof Venting Detail Figure 51 - Unbalanced Venting - Roof Exhaust Termination Options Concentric Termination...

  • Page 48: Venting Through An Existing System

    NOTE: The following instructions refer only to venting through an This boiler may be vented through an existing unused vent system. existing vent system, and not to venting with NTI’s optional concentric The inner diameter of the existing vent system is utilized for the vent kits.

  • Page 49: Power Venting, Indoor Combustion Air In Confined Or Unconfined Space

    Part 5 - Venting 3. Power Venting, Indoor Combustion Air in Confined or Unconfined Space This boiler requires fresh, uncontaminated air for safe operation and must be installed in a mechanical room where there is adequate combustion and ventilating air. NOTE: To prevent combustion air contamination, see Table 6.

  • Page 50: Part 6 - Installing The Condensate Drain

    If the boiler condensate outlet is lower than the drain, you must use a condensate removal pump (kit p/n 554200 available from NTI). NOTE: If a nearby laundry tub is used as a disposal for waste water from the washing machine, draining the condensate into this tub allows the soapy water discharge to neutralize the acidic condensate.

  • Page 51: Part 7 - Connecting Electrical Service

    Part 7 - Connecting Electrical Service WARNING Install wiring and electrically ground boiler in accordance with the authority having jurisdiction or, in the absence of such an authority, follow the National Electrical Code, NFPA 70, and/or CSA C22.1 Electrical PIPE HANGERS MUST CONDENSATE HOSE (supplied) BE USED TO SUPPORT...

  • Page 52: Removing The Power Cord (To Hard Wire The Boiler)

    Part 7 - Connecting Electrical Service Cut the cable inside the cabinet and below the plastic connector. NOTE: For additional electrical protection, the use of a whole house Remove the internal part of the cable from the junction box. surge protector is recommended. Damage caused by power surges IS Discard the internal and external parts of the cable.

  • Page 53: Connecting Power (120V) For Dhw And Ch Circulators

    Part 7 - Connecting Electrical Service 2. Connecting Power (120V) for DHW and CH Circulators To connect power for the CH and DHW external pump on the main PCB: Shut off the power supply at the boiler and at the circuit breaker. Shut off the gas at the manual shutoff.

  • Page 54: Room Thermostat Wiring Connections

    Part 7 - Connecting Electrical Service 4. Room Thermostat Wiring Connections To connect a room thermostat: 1. Access the low voltage wiring connections by following the directions in Item 3, Low Voltage Wiring Connections. 2. Loosen the cable clamp using a screwdriver and insert the wires leading from the room thermostat.

  • Page 55: Internal Wiring Details

    Part 7 - Connecting Electrical Service B. Internal Wiring Details POWER-IN DHW PUMP FUSE 5AT FUSE 5A CN16 CN22 CN26 CN19 CN12 CN20 Figure 70 - Electrical Wiring Diagram...
  • Page 56 Part 7 - Connecting Electrical Service Figure 71 - Ladder Diagram...
  • Page 57 Part 7 - Connecting Electrical Service Connector Description HT Selv No. of Location 120 VAC LIVE INPUT POWER SUPPLY 120 VAC NEUTRAL INPUT HT (120V~) AC PROTECTIVE EARTH 120 VAC EXT. PUMP2 INPUT / 120VAC LINE DIV1 EXTERNAL PUMP 2 / Hi-V DIVERTER VALVE 120 VAC NEUTRAL (DHW) 120 VAC EXT.
  • Page 58 Part 7 - Connecting Electrical Service Connector Description HT Selv No. of Location +24V ROOM THERMOSTAT SELV (24V) ROOM THERMOSTAT 1 SIGNAL NTC SYSTEM CASCADE NTC SENSOR SIGNAL NTC TANK SELV (5V) BOILER NTC SENSOR SIGNAL CN24 OUTDOOR SENSOR OUTDOOR NTC SENSOR SIGNAL +24V ROOM THERMOSTAT 2 SELV (24V)

  • Page 59: Part 8 - Gas Connections

    Part 8 - Gas Connections WARNING WARNING FIRE AND/OR EXPLOSION HAZARD Make sure the gas line pressures are within normal limits. Pressures outside normal limits can result in poor performance and hazardous To avoid serious injury or death, the gas line operating conditions, property damage, personal injury, or death.

  • Page 60: Additional Precaution For Excess Flow Valve (Efv)

    Part 8 - Gas Connections 7. Use a manometer to test the gas pressure to make sure it meets the WARNING minimum standards and does not exceed the maximum standards of the boiler. 8. Leak test the gas line pipe before placing the boiler in operation. DO NOT REMOVE OR ATTEMPT TO MAKE AN Only use approved leak detector liquid solutions to check for leaks.

  • Page 61: Part 9 - Controls

    Part 9 - Controls A. Control and Display Overview AUTO COMFORT ON OFF MENU PAR CODE 7 8 9 Display Icon Description Digits Indicating: Figure 75 - Control and Display Overview • Boiler Status • Temperature ( F) with bar level Item # Description •...

  • Page 62: Ignition Procedure

    Part 9 - Controls B. Ignition Procedure C. Central Heating (CH) Temperature Adjustment It is possible to adjust the central heating (CH) temperature setpoint Press the ON/OFF button on the control panel to power on the from the home screen by pressing the CH +/- buttons. See Figure 77. The boiler.

  • Page 63: User Menu

    1 or 2 of the selected zone appears next to the P EXT Time program defined by REMOCON room unit or NTI NET app. heating symbol: Outdoor Heating Curve Slope (only with AUTO function active) Continue to change the setting as described above.

  • Page 64: Info Menu

    D.H.W. temperature [°F] (for boilers connected to an external storage with NTC probe) Outdoor temperature (only with external sensor connected) [°F] Room temperature (only with NTI room sensor connected) [°F] (Zone1 / 2) 430/530 Fan speed (%) Heating outlet setpoint temperature [°F] Exhaust flue temperature [°F]...

  • Page 65: Automatic Temperature Control (Auto)

    User Menu, or set parameter 2.2.4 = 1 via the technical menu. NOTICE In order for the boiler to detect changes in room temperature it is necessary to install an NTI Room Sensor. Other thermostats (not NTI) can only switch the boiler ON and OFF. -13 °F...

  • Page 66: Type Of Temperature Control

    4 = Indoor and Outdoor Temp. Reset - The boiler target temperature automatically adjusts between the Min and Max Temperature Settings (4.2.6 and 4.2.5), based upon the input temperatures provided by an optional NTI Room Sensor AND the included Outdoor Sensor (or Internet Weather via WiFi connection), in accordance with the following formula: Boiler Target Temp = Min Temp (4.2.6) + Slope of Outdoor Reset Curve (4.2.2) X {Room Sensor Influence (4.2.4) X [Room Setpoint - Room Temp] + [Room Setpoint -...

  • Page 67: Parallel Shift Of Reset Curve

    120 °F Part 1 - General Safety Information Part 9 - Controls Outdoor temperature 179 °F K. Parallel Shift of Reset Curve +25°F (e.g. Parameter 4.2.3 for Zone 1) Increase parallel shift When the Reset Curve results in a boiler target temperature 0 °F Default that is too high or too low (i.e., heats the building too quickly...

  • Page 68: Room Temperature Day /Night

    The details can not be displayed on the boiler display. Table 29 - Time programs heating NOTICE Time programs heating are active only with NTI Room Thermostat or Sensor O. Automatic Summer / Winter Changeover When this function is activated, the boiler automatically switches from “winter”...

  • Page 69: Technical Menu - Access And Navigation

    Part 1 - General Safety Information Part 9 - Controls The menu and parameter numbers are shown on the display. P. Technical Menu - Access and Navigation CAUTION! THE MENUS RESERVED FOR QUALIFIED TECHNICIANS MAY ONLY BE ACCESSED AFTER ENTERING THE ACCESS CODE. To access advanced setup and troubleshooting parameters, it is To access the Menus, open the cover and proceed as follows (in this necessary to enter the Technical Menu.

  • Page 70: Technical Menu - Menu Structure

    (Only CH) 7 Free parameters Other - 1 10 Other - 2 BMS - Building Management System settings 11 NTI Zone Controller Parameters Only applicable with 0-10V / 4-20mA 0 General Clip-In Board installed 1 Diagnostics 42 BMS Parameters 0 General...

  • Page 71: Technical Menu - Complete Menu

    Part 1 - General Safety Information Part 9 - Controls R. Technical Menu - Complete Menu Description Value ACCESS the Complete Menu OK and ESC buttons for 5 seconds. T 222. Simultaneously press the the he display shows 2. Press the “+” button to select 234 , the service code. 3.
  • Page 72 Part 9 - Controls Part 1 - General Safety Information Description Value CH Anti-cycling Ignition Time Delay 0 - 7 (minutes) (when 2.3.5 = 0) 7 CH Post Pump Circulation Time 0 - 15 minutes or OC (AC) BOILER PARAMETER - PART 2 3 CH Fan Post-Purge 0 = 2 minutes, 1 = 5 minutes CH Boost Interval...
  • Page 73 68 - 122 °F Parameter 4.2.0 = 0 Only applicable when using an 3 Zone Freeze Protection Temperature 36 - 59 °F NTI room sensor - Changes all zones SUMMER/WINTER CHANGEOVER 0 S/W function activation 0 = OFF, 1 = ON 1 S/W temperature threshold 50 - 86 °F...
  • Page 74 Adjusts the influence of room temperature on target boiler temperature - a higher setting causes a greater increase to the boiler target temperature as the indoor temperature drops below room setpoint. Only applicable when using an optional NTI Room Sensor and when 4.2.1 = 2 or 4.
  • Page 75 Adjusts the influence of room temperature on target boiler temperature - a higher setting causes a greater increase to the boiler target temperature as the indoor temperature drops below room setpoint. Only applicable when using an optional NTI Room Sensor and when 5.2.1 = 2 or 4.
  • Page 76 Adjusts the influence of room temperature on target boiler temperature - a higher setting causes a greater increase to the boiler target temperature as the indoor temperature drops below room setpoint. Only applicable when using an optional NTI Room Sensor and when 6.2.1 = 2 or 4.
  • Page 77 Part 1 - General Safety Information Part 9 - Controls Description Value ZONE 3 REGULATION PARAMETERS See description of Parameter 5 Auto Boost 0 = OFF, 1 = ON 475. SERVICE PARAMETERS 0 BOILER STATISTICS-1 - Read Only 0 3 way valve cycles No. (n x10) 1 Boiler Pump On Hours (h x10) 2 Boiler pump cycles No.
  • Page 78 Part 9 - Controls Part 1 - General Safety Information Description Value 6 ERROR HISTORY 10 last errors ERROR 0 - ERROR 9 This parameter displays the last 10 boiler errors, indicating the error code, day, month and year of occurence. When the parameter is accessed, the errors are listed from ERROR 0 to ERROR 9.

  • Page 79: Part 10 - Start-Up Preparation

    Part 1 - General Safety Information Part 10 - Start-Up Preparation WARNING B. Check for Gas Leaks WARNING Thoroughly clean and flush any system that has used glycol before installing the boiler. Provide the customer with a Before starting the boiler, and during initial operation, smell material safety data sheet (MSDS) on the fluid used.

  • Page 80: System Water Fill, Purge, And Test

    Part 10 - Start-Up Preparation Part 1 - General Safety Information 6. Anti-freeze solutions expand more than water. For example: A 50% WARNING by volume solution expands 4.8% in volume for a temperature increase from 32 - 80 F, while water expands 3% over the same Eliminate all system leaks.
  • Page 81 Part 1 - General Safety Information Part 10 - Start-Up Preparation Figure 90 - Condensate Discharge must use a condensate removal pump. This pump is equipped with two leads that can be connected to an alarm or another type of warning device to alert the user of a condensate overflow, which, if not corrected, could cause property damage.

  • Page 82: Part 11 - Start-Up

    Part 11 - Start-Up Part 1 - General Safety Information c. After the cycle has ended ensure the system is completely WARNING purged of air and verify that system pressure is at least 12 psi on the pressure gauge. If not, repeat the procedure. The purge function can be accessed at any time by pressing FOR YOUR OWN SAFETY READ BEFORE OPERATING ESC for five (5) seconds.

  • Page 83: Combustion Checking Procedure

    Part 1 - General Safety Information Part 11 - Start-Up Operation 3 - Adjusting the CO2 at Maximum Gas Flow Rate (High B. Combustion Checking Procedure Fan Speed) Set the thermostat at the highest possible setting or draw off the The order of operations for this procedure domestic hot water at the maximum water flow rate to create a must always be respected.
  • Page 84 Part 1 - General Safety Information Part 11 - Start-Up Operation 4 - Checking the CO2 at Minimum Gas Flow (Low Fan Speed) With the Test Function active, press the button to operate the boiler at minimum DHW power. The icons will display.

  • Page 85: Checking Combustion Parameters

    D. Converting the Appliance from Natural Gas to Propane Operation NTI boilers are factory set to operate on Natural Gas. BEFORE OPERATING ON PROPANE the boiler must be converted to Propane using the included conversion kit specific to the boiler model.
  • Page 86 Part 12 - Installation Checklist Part 1 - General Safety Information Before Installing Note Is there enough space to ensure proper installation? Does installation location allow for proper service clearances? Are water and gas lines properly sized and set at proper pressures for the installation? Is boiler location as near the exhaust vent / intake pipe terminations as possible? Have combustible materials been cleared from the installation location? Is there a drain close to the boiler?

  • Page 87: Part 12 - Installation Checklist

    Part 1 - General Safety Information Part 12 - Installation Checklist Wiring Note Has the power and control been wired per boiler wiring diagram, this manual? Is the main electrical connection polarity within boiler requirements? Does the power supply voltage agree with the boiler rating plate? 120V AC? Start-Up, Adjust, and Test Note Has the boiler been started?

  • Page 88: Part 13 - Troubleshooting

    Part 13 - Troubleshooting Part 1 - General Safety Information 3. Malfunction Warning A. Boiler Protection Devices This warning is shown by the display in the following format: The boiler is protected from malfunctioning by means of internal checks performed by the electronic microprocessor PCB, which stops 5 P1 = FIRST IGNITION ATTEMPT UNSUCCESSFUL the boiler from operating if necessary.

  • Page 89: Boiler Error Codes

    Part 1 - General Safety Information Part 13 - Troubleshooting B. Boiler Error Codes Display Description Possible Remedies Error Type CH Circuit Press the Reset button to clear the Error Code. If Error happens again: Blocking 1. Check for the correct functioning and positioning of the supply and return 1 01* Overheat (Manual...
  • Page 90 Part 1 - General Safety Information Part 13 - Troubleshooting Display Description Possible Remedies Error Type The Error Code will go away when the condition is remedied. If Error happens again: 1. Check outdoor sensor. Ensure all wiring connections are intact and secure. If the sensor wires were secured to the wall with staples, the wires may have been damaged.
  • Page 91 Part 1 - General Safety Information Part 13 - Troubleshooting Display Description Possible Remedies Error Type Ignition and Detection Press the Reset button to clear the error code. If Error happens again: 1. Monitor the gas pressure to the appliance while in operation. Ensure pressure is between 3.5 and 10.5”...
  • Page 92 Repeated Lockout Error conditions could indicate a serious error with the boiler or installation. Failure to contact a qualified service technician to troubleshoot the error could result in substantial property damage, serious personal injury, or death. *Error is resettable remotely via NTI Tele-Diagnostic Service, NTI Remote Contractor.

  • Page 93: Procedures

    Part 1 - General Safety Information Part 14 - Maintenance Check Exhaust Vent and Intake Pipe Terminations DANGER Verify that the boiler exhaust vent and intake pipe terminations are clean and free of obstructions. Remove any debris from the exhaust The boiler must be inspected and serviced annually, vent or intake pipe openings.

  • Page 94: Maintenance Only To Be Performed By A Qualified Service Technician

    Part 1 - General Safety Information Part 14 - Maintenance 3. If applicable, check the condensate neutralizer and ensure it is full Check Water and Gas Piping of condensate neutralizing marble chips. 1. Remove the boiler cover and perform a gas leak inspection following Operating Instructions, page 2, this manual.
  • Page 95 Part 1 - General Safety Information Part 14 - Maintenance 2. Unhook the junction box support from the fan and silencer WARNING Water drained from the boiler could be scalding hot. Wait for the boiler to cool before draining water, and take precautions when draining water.
  • Page 96 Part 1 - General Safety Information Part 14 - Maintenance 5. Remove the gas diaphragm. 13. After all maintenance is complete, reinstall the combustion 6. Remove the electrical connection of the electrode. assembly. Ensure all gaskets are installed and all components are 7.
  • Page 97 Part 1 - General Safety Information Part 14 - Maintenance 4. Verify and replace the other gaskets if they are damaged or DANGER showing signs of deterioration. 5. Make sure that the burner is not damaged. Replace if necessary. When servicing is complete, make sure the condensate collector 6.

  • Page 98: Replacing Components

    Part 1 - General Safety Information Part 14 - Maintenance Clean the filter with a toothbrush and clean running water. DANGER Reinstall the CH Filter. Remove the DHW flow switch to have access to the DHW inlet Failure to replace a damaged sealing ring will result in exhaust filter.
  • Page 99 11. Reinstall the air pressure switch. 12. Reconnect the electrical connection of the air pressure switch. Removing the By-Pass Valve TRX085 and TRX120 The by-pass valve is located in the left hydraulic block. To remove it: Ensure the boiler is drained of water.
  • Page 100 Part 1 - General Safety Information Part 14 - Maintenance Replacing the Main Heat Exchanger 1. Drain the boiler and remove the combustion assembly as described in Cleaning the Heat Exchanger Combustion Chamber. 2. Loosen and remove the CH relief valve. 3.

  • Page 101: After Maintenance Is Complete

    Part 1 - General Safety Information Part 15 - Maintenance Report Replace the Main PCB CAUTION Fold down the electronics box. Unlock the two clips and open the electronics box cover. In unusually dirty or dusty conditions, care must be taken to DANGER keep boiler cabinet door in place at all times.
  • Page 102 Part 1 - General Safety Information Part 15 - Maintenance Report INSPECTION ACTIVITIES DATE LAST COMPLETED 1 st YEAR 2 nd YEAR 4 th YEAR* 3 rd YEAR PIPING Near boiler piping Check boiler and system piping for any sign of leakage. Leaking pipes could cause property damage.

  • Page 103: Part 16 - Shutdown

    Part 1 - General Safety Information Part 16 - Shutdown Supply/Return Temperature Sensors A. Shutdown Procedure Outdoor Sensor Tank Sensor If the burner is not operating, disconnect the electrical supply. DHW Outlet Sensor If the burner is operating, lower the set point value to 86 F(for high Outside temperature system) or 68°F (for low temperature system) and wait for...

  • Page 104: Part 17 - Maintenance Notes

    Maintenance Notes...
  • Page 105 Part 1 - General Safety Information...
  • Page 106 Part 1 - General Safety Information...

  • Page 107: Customer Installation Record Form

    Customer Installation Record Form The following form should be completed by the qualified installer / service technician for you to keep as a record of the installation in case of a warranty claim. After reading the important notes at the bottom of the page, please also sign this document. Customer’s Name Date of Installation Installation Address...
  • Page 108 Visit us online NTI Boilers Inc. 30 Stonegate Drive Saint John, NB E2H 0A4 Canada Technical Assistance: 1-800-688-2575 Website: www.ntiboilers.com Fax: 1-506-432-1135 420010970803...

This manual is also suitable for:

TrxTrx120Trx110cpTrx150cTrx110c

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