NTI FTVN II Series Installation Start-Up Maintenance
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NTI FTVN II Series Installation Start-Up Maintenance

Residential condensing gas boiler
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INSTALLATION
START-UP
MAINTENANCE
Models
FTVN085 / FTVN110
FTVN150 / FTVN199
FTVN110C / FTVN150C / FTVN199C
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.
Residential Condensing Gas Boiler
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.
FTVN
FTVN
Series ii
Series ii
Heat Exchanger Bears the ASME "H" Stamp

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  • Page 1 FTVN FTVN Series ii Series ii Residential Condensing Gas Boiler INSTALLATION START-UP MAINTENANCE Models FTVN085 / FTVN110 FTVN150 / FTVN199 FTVN110C / FTVN150C / FTVN199C Heat Exchanger Bears the ASME “H” Stamp DANGER NOTICE THIS MANUAL MUST ONLY BE USED BY A QUALIFIED INSTALLER / The manufacturer reserves the right to make product changes or updates without notice SERVICE TECHNICIAN.
  • 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 Foreword This manual is intended to be used in conjunction with other literature The following defined terms are used throughout this provided with the boiler. This includes all related control information. manual to bring attention to the presence of hazards of It is important that this manual, all other documents included in this various risk levels or to important product information.
  • 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 A. Operation and Installation Warnings 1. Gas Pipe Sizing B. Improper Combustion 2. Natural Gas Pipe Sizing C. Gas 3. LP (Liquid Propane) Gas Pipe Sizing D.

  • Page 6: Part 1 - General Safety Information

    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

    DO NOT alter or modify the appliance or appliance controls. Altering any NTI boiler with parts not manufactured by NTI WILL D. When Servicing the Boiler 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 water supplied CH applications. from utility or well water in compliance with EPA secondary maximum NOTE: NTI DOES NOT WARRANT THE BOILER AGAINST FREEZE- contaminant levels (40 CFR Part 143.3). If the water contains RELATED DAMAGE.

  • Page 9: Water Temperature Adjustment And Scalding

    Part 1 - General Safety Information Table 3 details the relationship of water temperature and time with CAUTION regard to scald injury and may be used as a guide in determining the safest water temperature for your applications. On FTVN085 / FTVN110 / FTVN150 / FTVN199 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 3-way valve motor MUST BE DISCONNECTED while the boiler is operating in...

  • Page 10: Part 2 - Before You Start

    Part 2 - Before You Start How the Boiler Operates NOTICE FTVN condensing technology intelligently delivers hydronic heating while maximizing efficiency. Outlined below are system features and UNCRATING THE BOILER - Any claims for damage or shortage operation: in shipment must be filed immediately against the transportation Stainless Steel Heat Exchanger company by the consignee.

  • Page 11: Optional Equipment

    DHW supply temperature to the set point. DHW Flow Meter Monitors DHW flow rate. B. Optional Equipment Optional equipment available from NTI (and Part #): • System Sensor(*) (6000084010) (*) One system sensor is required when cascading multiple boilers;...

  • Page 12: Part 3 - Prepare The Boiler For Installation

    Part 3 - Prepare the Boiler for Installation CAUTION CAUTION COLD WEATHER HANDLING - If the boiler has been stored in a very The service life of the boiler’s exposed metallic surfaces, such as the cold location (BELOW 0°F) before installation, handle with care until casing, as well as internal surfaces, such as the heat exchanger, are the components come to room temperature.

  • Page 13: Leveling

    Part 3 - Prepare the Boiler for Installation NOTE: A combustible door or removable panel is acceptable front NOTE: For closet installations, a combustible door or removable clearance. panel is acceptable front clearance. A 3” minimum clearance must be provided from the appliance front cover to the removable panel or B.

  • Page 14: Wall Mounting Considerations

    Part 3 - Prepare the Boiler for Installation Alcove Installations Alcove installations have the same minimum dimensions as closet installations, except the installation must be completely open to the room at a distance no greater than 18 in. (457 mm) from the front of the boiler and the room must be at least three (3) times the size of the alcove.

  • Page 15: Residential Garage And Closet Installations

    Part 3 - Prepare the Boiler for Installation 4. Drill and plug the wall and secure the lower mounting bracket DANGER using field provided screws. Then adjust the lower mounting bracket on the boiler. Ensure the boiler is installed plumb. Tighten Failure to vent the boiler properly will result in serious personal injury the bracket to the boiler.

  • Page 16: Carbon Monoxide Detectors

    Part 3 - Prepare the Boiler for Installation permanent openings: one located 6” (15 cm) below the space ceiling, the I. Prevent Combustion Air Contamination other 6” (15cm) above the space floor. Each opening should have a free area of one square inch per 1,000 BTU/hr (22cm /kW) of the total input of Install intake air piping for the boiler as described in the Venting all appliances in the space, but not less than 100 square inches (645cm...

  • Page 17: Removing A Boiler From A Common Vent System

    Part 3 - Prepare the Boiler for Installation J. Removing a Boiler from a Common Vent System DANGER Do not install the boiler into a common vent with any other appliance. This will cause flue gas spillage or appliance malfunction, resulting in possible substantial property damage, severe personal injury, or death.

  • Page 18: Technical Specifications

    Part 3 - Prepare the Boiler for Installation K. Technical Specifications Model FTVN085 FTVN110 FTVN150 FTVN199 FTVN110C FTVN150C FTVN199C Type Boiler Boiler Boiler Boiler Combi Combi Combi Installation Indoor, Wall Hung, Fully Condensing 11,000 / 15,000 / 11,000 / 15,000 / Minimum / Maximum Input (Btu/Hr) 8,500 / 85,000 19,900 / 199,000...
  • Page 19 Part 3 - Prepare the Boiler for Installation 10" 8 " 4 " 4 " 8 " 8 " 4 " 2 " 8 " 4 " 3" 8 " 8 " 4 " 3" 2 " Figure 8 - Boiler Dimensions - NOTE: All Dimensions Are Approximate Non-Combi Models Combi Models A - Central Heating Supply...
  • Page 20 Part 3 - Prepare the Boiler for Installation FTVN Components 11. Diverter valve 20. Thermal Fuse Exhaust vent connection Air intake connection 12. DHW Temperature Sensor (Combi 21. Silencer Spark generator Models Only) 22. Boiler outlet temperature sensor Modulating Fan 13.
  • Page 21 Part 3 - Prepare the Boiler for Installation Combi Models Non-Combi Models Pressure relief valve 15. Circulation Pump Air purge valve 16. DHW Flow Sensor (Combi Boiler outlet temperature Models Only) sensor 17. Water pressure switch DHW Temperature Sensor 18. Modulating Fan Flue gas temperature 19.

  • Page 22: Part 4 - Water Piping

    CAUTION be connected to an indirect water heater to supply domestic hot water. NTI offers indirect water heaters in a wide range of gallon sizes Undersized expansion tanks cause system water to be lost from the in stainless steel construction.

  • Page 23: Piping The Boiler

    Part 4 - Water Piping D. Piping the Boiler CAUTION NOTE: Observe the minimum 1” clearance around all uninsulated hot Non-Combi Models should not be operated as a direct potable hot water pipes when openings around pipes are not protected by non- water heater.

  • Page 24: Internal Circulation Pump

    Part 4 - Water Piping DHW Loop (Combi Models) E. Internal Circulation Pump The DHW piping must be provided with a DHW pressure relief valve that complies with local codes, but not less than valves certified To calculate the size of the heating installation refer to the graph below. as meeting the requirements of Relief Valves for Hot Water Supply Graph Representing the Available Circulation Pump Head Systems, ANSI Z21.22 / CSA4.4 by a nationally recognized lab that...

  • Page 25: Air Elimination Device

    Part 4 - Water Piping I. Applications* WARNING CAUTION FAILURE TO RE-INSPECT THE RELIEF VALVE AS DIRECTED COULD RESULT IN UNSAFE TEMPERATURE AND/OR PRESSURE BUILD-UP WHICH CAN RESULT IN PROPERTY In mixed temperature applications, mixing valves are required for the DAMAGE, SERIOUS PERSONAL INJURY, OR DEATH.
  • Page 26 Part 4 - Water Piping LINE VOLTAGE JUNCTION BOX ZONE 1 ZONE 2 CH PUMP DHW PUMP 120VAC INPUT TRANSFORMER JUMPER INDIRECT FIRED WATER HEATER ZONE #1 ZONE #2 CAP WHEN NOT IN USE CLOSELY SPACED TEES MAKE-UP WATER Figure 15 - Boiler with Single Central Heating Circulator NOTE: In piping applications utilizing a single 6.
  • Page 27 Part 4 - Water Piping LINE VOLTAGE JUNCTION BOX ZONE 1 ZONE 2 CH PUMP DHW PUMP 120VAC INPUT TRANSFORMER JUMPER INDIRECT FIRED WATER HEATER WATER HEATER ZONE #1 ZONE #2 CAP WHEN NOT IN USE WARNING MAKE-UP WATER IMPORTANT: For direct (not primary / secondary) piping applications, EXPANSION TANK MUST BE ON THE the expansion vessel must be placed on the return side of the...
  • Page 28 Part 4 - Water Piping CAUTION LINE VOLTAGE JUNCTION BOX ZONE 1 ZONE 2 CH PUMP DHW PUMP 120VAC INPUT In mixed temperature applications, mixing valves are required for the protection of low temperature loops. JUMPER JUMPER INDIRECT FIRED WATER HEATER ZONE #1 ZONE #2 CAP WHEN...
  • Page 29 Part 4 - Water Piping LINE VOLTAGE JUNCTION BOX ZONE 1 ZONE 2 CH PUMP DHW PUMP 120VAC INPUT TRANSFORMER JUMPER ZONE #1 ZONE #2 MAKE-UP CLOSELY SPACED TEES WATER Figure 18 - Combi Boiler with Single Central Heating Circulator NOTE: In piping applications utilizing a single NOTES: 8.
  • Page 30 Part 4 - Water Piping LINE VOLTAGE JUNCTION BOX ZONE 1 ZONE 2 CH PUMP DHW PUMP 120VAC INPUT TRANSFORMER JUMPER ZONE #1 ZONE #2 WARNING MAKE-UP For direct (not primary / secondary) piping WATER IMPORTANT: applications, the expansion vessel must be placed on EXPANSION TANK MUST BE ON THE the return side of the boiler as illustrated.
  • Page 31 Part 4 - Water Piping CAUTION LINE VOLTAGE JUNCTION BOX ZONE 1 ZONE 2 CH PUMP DHW PUMP 120VAC INPUT In mixed temperature applications, mixing valves are required for the protection of low temperature loops. JUMPER JUMPER ZONE #1 ZONE #2 MAKE-UP CLOSELY SPACED TEES WATER...
  • Page 32 Part 4 - Water Piping KITCHEN SINK BATHROOM SINK BATH LAUNDRY BALL BALL VALVE VALVE DHW SUPPLY FLOW-CHECK VALVE COLD WATER SUPPLY BALL VALVE DRAIN DOMESTIC CIRCUIT RECIRC RETURN SETTER RECIRC PUMP W/BALL VALVES FLOW-CHECK VALVE NOTICE: This illustration is used for piping concept only. Figure 21 - Combi Boiler with Recirculation NOTES: WARNING...

  • Page 33: 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 34: 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 ABS* ANSI/ASTM D2661 ANSI/ASTM D2661 ONLY PVC Schedule 40/80 UL-1738 or ANSI/ASTM D1785 PVC-DWV Schedule 40/80 UL-1738 or ANSI/ASTM D2665 Pipe Approved for...

  • Page 35: 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 Intake Pipe Terminal Exhaust Vent Terminal Area Where Intake Terminal Is Not Permitted Figure 22 - 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 36: Exhaust Vent And Intake Pipe Sizing

    Part 5 - Venting F. Tightening Boiler Collar to Exhaust Vent and E. Exhaust Vent and Intake Pipe Sizing Intake Pipe 1. All models ship with 3” diameter vent pipe exhaust vent and intake Follow the steps to install exhaust vent pipe into the boiler vent air pipe connections.

  • Page 37: Exhaust Vent And Intake Pipe Installation

    The following table lists optional exhaust/intake terminations shutdowns. available from NTI: 14. In vacant chimney applications, install and seal a rain cap over Description Stock Code existing chimney openings.

  • Page 38: Applications

    Vent Material Description Figure Size Part Number Compatibility Roof Wall 196984 2” 26, 30 (NTI p/n 85062) IPEX (or Equivalent) Low Profile (Wall) 7 196985 3” 26, 30 (NTI p/n 84357) PVC/CPVC 2” 196125 27, 31, 38, 42 IPEX (or Equivalent)
  • Page 39 Part 5 - Venting Sidewall Venting Options - Direct Vent Installation Two Pipe Termination Low Profile 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 40 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 Exhaust installation instructions. Exhaust Exhaust Vertical Air-inlet Air-inlet Min 18” Air-inlet around perimeter Gas Vent Directly...
  • Page 41 Part 5 - Venting Snorkel Venting (Two Pipe Sidewall Venting Terminations Venting Below Grade Beneath an Overhang) For installations that exit the wall below grade: 1. Excavate the site to a point where the pipes are to exit as shown in Figure 34.
  • Page 42 Part 5 - Venting Roof Venting Options - Direct Vent Installation Two Pipe Termination Unbalanced Termination (Roof Exhaust / Sidewall Intake) WARNING WARNING Exhaust must terminate a minimum of 18” above the air intake Exhaust must terminate a minimum of 12” above snow level. See termination.
  • Page 43 Part 5 - Venting Roof Venting Options - Direct Vent Installation Two Pipe Termination Unbalanced Venting - Roof Exhaust Termination WARNING WARNING Vent screen Exhaust Vent pipe piece to Figure illustrates two options for exhaust termination only. Neither retain vent screen vent pipe illustrated is intended for combustion air intake.

  • Page 44: 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 45: Power Venting, Indoor Combustion Air In Confined Or

    Part 5 - Venting 3. Power Venting, Indoor Combustion Air in Confined or INDOOR COMBUSTION AIR Unconfined Space EXHAUST (SINGLE PIPE) 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.

  • Page 46: Part 6 - Installing The Condensate Drain

    Part 6 - Installing the Condensate Drain 4. If using flexible tube, place an overflow tee in the tube line to prevent CAUTION condensate backing up into the boiler if the tube should kink. Ensure the overflow tee is positioned near a drain or in a location that will not This condensing high efficiency boiler has a condensate removal damage the surrounding area.

  • Page 47: Part 7 - Connecting Electrical Service

    Part 7 - Connecting Electrical Service NOTE: For additional electrical protection, the use of a whole house WARNING surge protector is recommended. Damage caused by power surges IS NOT covered by the warranty. Install wiring and electrically ground boiler in accordance with the 1.

  • Page 48: Room Thermostat Wiring Connections

    Part 7 - Connecting Electrical Service Open the control panel cover to have access to the main PCB. See 3. Room Thermostat Wiring Connections Figure 51. To connect a room thermostat: 1. Access the low voltage wiring connections by following the directions in Item 3, Low Voltage Wiring Connections.

  • Page 49: Internal Wiring Details

    Part 7 - Connecting Electrical Service B. Internal Wiring Details FUSE 5A CN16 CN22 CN26 1 CN19 CN12 CN20 Figure 54 - Electrical Wiring Diagram FTVN Serie II - Installation - Startup - Maintenance Instructions...
  • Page 50 Part 7 - Connecting Electrical Service WIFI FLAME SENSOR RETURN TEMP. PROBE OUTLET TEMP. PROBE BOILER PUMP FLUE TEMP. PROBE COMBUSTION BLOWER AIR PRESSURE SW THERMAL FUSE EXCH. SPARK GENERATOR FLOW METER WATER PRESSURE SENSOR MAIN BOARD GAS VALVE DHW TEMP. PROBE DIVERTER VALVE THERMOSTAT 1...
  • Page 51 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 / 120 VAC NEUTRAL Hi-V DIVERTER VALVE (DHW) 120 VAC EXT.
  • Page 52 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 53: 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 54: Additional Precaution For Excess Flow Valve (Efv)

    Part 8 - Gas Connections 8. Leak test the gas line pipe before placing the boiler in operation. To check inlet gas pressure: Only use approved leak detector liquid solutions to check for leaks. Remove yellow cap from line pressure test point. See Figure 58. 9.

  • Page 55: Part 9 - Controls

    Part 9 - Controls A. Control Overview B. Display Overview 20:35 Single Boiler 17 psi 66°F 10/20/2023 Status Outlet: Power: 100 % 10/20/2023 20:35 Single Boiler 17 psi 66°F 158 °F Status Outlet: Power: Demand 158 °F Central Heating F.Signal 125 Target 180°...

  • Page 56: Display - Boiler Status

    Boiler temperature in range Demand Target 180° Boiler temperature in range Part 9 - Controls ombi 09/28/2023 10:35 Single Boiler 66°F C. Display Status DHW: Power: ombi 09/28/2023 10:35 Single Boiler 17 psi 66°F Home Page 09/28/2023 10:35 Single Boiler 66°F 28=0 124°F...

  • Page 57: Main Menu

    Part 9 - Controls D. Main Menu Main Menu Navigate the Main Menu as follows: Setup wizard 1. From the Home Page, press ENTER. Boiler Details Note: if the display is “asleep”, you will need to press ENTER a 2nd time to access the User Menu Main Menu.

  • Page 58: Setup Wizard

    User Menu Tech menu Test mode Part 9 - Controls Main Menu Insert Code Insert Code Setup wizard E. Setup wizard Boiler Details Insert technical code Insert technical code User Menu Main Menu The Setup Wizard allows for the easy Main Menu Main Menu Main Menu...

  • Page 59: Boiler Details

    Part 9 - Controls F. Boiler Details Main Menu MENU The BOILER DETAILS menu provides the status Setup wizard of each of the boiler’s inputs and outputs. Boiler Details User Menu Navigate the Boiler Details menu as follows: Tech menu 1.

  • Page 60: User Menu

    Part 9 - Controls G. User Menu Main Menu MENU Setup wizard Navigate the User Menu as follows: Boiler Details 1. From the Main Menu, turn the dial to highlight “User Menu” and press ENTER. User Menu 2. Turn the dial to highlight the option you wish to access then press ENTER. Tech menu 3.
  • Page 61 ROOM SETPOINT (HOLIDAY/ANTI-FROST) (4.0.3) Minim Sets the global room temperature setpoint during holiday or inactive periods. Only 41°F applicable when using an NTI Room Sensor. (35-75°F) Table 28 - CH Setup FTVN Serie II - Installation - Startup - Maintenance Instructions...
  • Page 62 Part 9 - Controls 4. User Menu - DHW Setup User Menu User Menu Screen Settings Navigate the DHW Setup menu as follows: Screen Settings Time & Date 1. From the User Menu select “DHW Setup” and press ENTER. Time & Date CH Setup 2.
  • Page 63 Boiler will only operate for Anti-freeze function (if set to Enabled). Holida Holiday Boiler will only run to maintain the room temperatures of zones with NTI Room Sensors at the Holiday setpoint; other CH zones will remain off. DHW will only Holiday...
  • Page 64 Minimum value ROOM SETPOINT (COMFORT) (4.0.0) Room temperature setpoint for selected zone during Comfort time period. 66°F Only applicable when using an NTI Room Sensor. (50-86°F) ROOM SETPOINT (REDUCED) (4.0.1) Zone 1 Operating mode Room temperature setpoint for CH zone 1 during Reduced time period.
  • Page 65 Time & Date System unit of measurament CH Setup Screen brightness DHW Setup Language Part 9 - Controls Operating Mode Time program 6a. User Menu - Time Program - View/Edit Schedule Screen Settings Time Program Navigate the View/Edit Schedule as follows: International System Zone 1 1.
  • Page 66 Part 9 - Controls 6c. User Menu - Time Program - View/Edit Schedule - Wizard time programming Navigate the Wizard Time Programming menu as follows: 1. From the View/Edit Schedule menu select “Wizard Time Programming” and press Scheduling ENTER. Scheduling Free Time Programming me Programming 2.
  • Page 67 Part 9 - Controls 6d. User Menu - Time Program - View/Edit Schedule - PRESET Programs Navigate the Preset Programs menu as follows: Preset Programs - ON time slots 1. From the View/Edit Schedule menu select “Preset Programs” and press 07:00 –...

  • Page 68: Tech Menu

    Boiler Details Zone 2 User Menu AUTO Function (Outdoor Reset) Part 9 - Controls Tech menu General Advanced Settings Test mode H. Tech Menu Technical Area CH Setup Technical Area Tech Menu CH Setup Insert Code Setup wizard Zone 1 Technical Area Setup wizard CH setup...
  • Page 69 Room&Outdoor – the boiler target temperature automatically adjusts between the Min and Max Temperature Settings, based upon the input temperatures provided by an optional NTI Room Sensor AND the included Outdoor Sensor (or Internet Weather via WiFi connection). HEATING CURVE SLOPE (4.2.2) Sets the slope of the heating curve for zone 1.
  • Page 70 Part 9 - Controls continued from the previous page Menu Option | Description (Range Default ZONE 2 Same options as Zone 1 menu but dedicated to Zone 2. Note: parameter numbers for Zone 2 start with “5”. AUTO FUNCTION (OUTDOOR RESET) (2.2.4) Allows the operator to globally enable/disable the Automatic Temperature Control Mode for all zones.
  • Page 71 Part 9 - Controls 2. DHW setup Tech Menu Tech Menu To navigate the DHW Setup menu proceed as follows: CH setup CH setup 1. From the Tech Menu, turn the dial to highlight “DHW Setup” and press ENTER. DHW setup DHW setup 2.
  • Page 72 Part 9 - Controls 3. Cascade Setup NOTICE Tech Menu Tech Menu To navigate the Restore/Backup menu CH setup CH setup proceed as follows: In the case of cascade installation, DHW setup DHW setup 1. From the Tech Menu, turn the dial to Cascade Setup read the manual "Cascade System Cascade Setup...
  • Page 73 Part 9 - Controls 5. BMS Controls Tech Menu Tech Menu DHW setup DHW setup Building Management System. Cascade Setup Cascade Setup Only visible with 0-10V / 4-20mA Clip-In Board installed Restore/Backup Restore/Backup BMS Control BMS Control To navigate the BMS Control menu proceed as follows: Complete Menu Complete Menu 1.
  • Page 74 Part 9 - Controls Tech Menu 6. Complete Menu DHW setup Tech Menu Cascade Setup DHW setup To navigate the Complete Menu proceed as follows: Restore/Backup Cascade Setup 1. From the Tech Menu, turn the dial to highlight “Complete Menu” and press ENTER. BMS Control Restore/Backup 2.
  • Page 75 Function FTVN110C Function can be utilized to reduce the stroke of the 3-way FTVN150 valve when transitioning between the CH and DHW posi- tions. Consult NTI Technical Support before utilizing. FTVN 150C FTVN199 3 DO NOT USE FTVN199C 5 DO NOT USE...
  • Page 76 Part 9 - Controls Description Value Description Value Note Note 4 Max CH percentage 2 DHW Start Delay 55 - 100 5 - 200 CANNOT BE MODIFIED (0.5 to 20 seconds) FTVN085 Anti “water hammering” FTVN110 3 DHW switch off logic 0 = anti-scale (stop at FTVN110C >...
  • Page 77 WARNING: Always check PCB settings if restoring factory (Comfort) default settings on a replacement controller. Replacement Only applicable when using an NTI room sensor controllers have generic settings that may not be specific to the boiler model. 1 Room Setpoint 32 - 86 °F...
  • Page 78 5 ZONE 2 PARAMETERS 0 TEMPERATURE SETTINGS 0 Room Setpoint 50 - 86 °F (Comfort) Only applicable when using an NTI room sensor 1 Room Setpoint 32 - 86 °F (Reduced) Only applicable when using an NTI room sensor 2 Zone 2 Fixed Water 68 - 179 °F...
  • Page 79 3 Room Setpoint (Holiday/ 36 - 75 °F setpoint Anti-frost) 7 ZONE 3 REGULATION PARAMETERS Only applicable when using an NTI room sensor - Changes 5 Auto Slope Boost 0 = OFF, 1 = ON all zones See description of Parameter 475.
  • Page 80 Part 9 - Controls Description Value Description Value Note Note 2 GENERAL ZONE MODULE 8 SERVICE PARAMETERS 0 Hydraulic scheme 0 BOILER STATISTICS-1 - Read Only definition MGM II 0 DHW pump cycles (n/10) MGM III 1 Boiler pump on time (h/10) MGZ I 2 Boiler pump cycles (n/10) MGZ II...
  • Page 81 Part 9 - Controls Description Value Description Value Note Note 1 Enable Maintenance 0 = OFF, 19. 1 CONNECTIVITY INFO Warning 1 = ON 19. 1. Connectivity status 2 Maintenance Warning Do you really want to perform Initialization Reset the RESET? If you pressOK Idle button, the reset command Acess Point initializing...
  • Page 82 Part 9 - Controls 7. PCB Replacement Description Value To navigate the PCB Replacement Menu proceed as follows: 1. From the Tech Menu, turn the dial to highlight “PCB Replacement” and press ENTER. Note 2. Turn the dial to select the parameters and press ENTER. 4.

  • Page 83: Test Mode

    Technical Area CH Setup Setup wizard Zone 1 Part 9 - Controls Boiler Details Zone 2 User Menu AUTO Function (Outdoor Reset) I. TEST MODE Tech menu General Advanced Settings Technical Area CH Setup Technical Area Test mode Setup wizard Zone 1 Setup wizard Navigate the Test Mode menu as follows:...

  • Page 84: Connectivity

    Set to “On” to have the time automatically set via the internet connection based on Signal Level the boiler’s entered address. Note: the address is entered when registering the boiler to an “NTI net” End User or Service Center. INTERNET WEATHER (19.0.4) Connectivity Set to “On”...

  • Page 85: Diagnostics

    User Menu User Menu Version User Menu Maintenance Warning Reset Statistics Enable M Version Maintenance Warning Reset Tech Menu Tech Menu Tech Menu Version Maintena Test Mode Maximum value Test Mode Diagnostics Diagnostics Test Mode Maximum va Diagnostics Diagnostics Minimum value Minimum val Error History Part 9 - Controls...

  • Page 86: Part 10 - Start-Up Preparation

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

  • Page 87: System Water Fill, Purge, And Test

    Part 10 - Start-Up Preparation 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 88: Part 11 - Start-Up

    Part 10 - Start-Up Preparation Part 11 - Start-Up WARNING FOR YOUR OWN SAFETY READ BEFORE OPERATING 1. This boiler does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

  • Page 89: First Ignition

    Technical Area Output Test Air purge Function Setup wizard Boiler Details Part 11 - Start-Up User Menu 09/28 Tech menu Make sure that the gas supply is valved A. First Ignition NOTE: AIR PURGE FUNCTION off and the boiler is properly connected Test mode To activate the Air purge Function to a 120VAC power supply with...

  • Page 90: Combustion Checking Procedure

    Part 11 - Start-Up WARNING B. Combustion Checking Procedure The order of operations for this procedure must always be respected. It is very important that the combustion system be set within the recommended CO measurements listed in Table 42. Visually OPERATION 1 looking at the burner does not determine combustion quality.
  • Page 91 Part 11 - Start-Up WARNING It is very important that the combustion settings are within the ranges listed in Table 42. Visually looking at the burner does not determine combustion quality. Failure to measure combustion with a calibrated combustion analyzer and set the throttle within the recommended combustion measurements could result in property damage, severe personal injury, or death.
  • Page 92 Part 11 - Start-Up Adjusting the Gas Valve at Min Power (10%) Remove cap and adjust screw 2 by turning counter-clockwise to reduce the CO 2 level; clockwise to increase the CO 2 level (Note: total adjustment should not exceed 1/4 of a turn from factory setting).

  • Page 93: Converting The Appliance From Natural Gas To Propane Operation

    ATTENTION: to Propane Operation LIQUEFIED PETROLEUM (LP) PROPANE NTI boilers are factory set to operate on Natural Gas. Liquefied Petroleum (LP) propane gas is heavier than air; BEFORE OPERATING ON PROPANE the boiler must be converted to therefore, it is imperative that your boiler is not installed in a Propane using the included conversion kit specific to the boiler model.

  • Page 94: Part 12 - Installation Checklist

    Part 12 - Installation Checklist 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? Water Piping...
  • Page 95 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 96: Part 13 - Troubleshooting

    Part 13 - Troubleshooting 2. Lockout Error A. Boiler Protection Devices A lockout error means the boiler does not return to operation after the The boiler is protected from malfunctioning by means of internal error condition goes away. checks performed by the electronic microprocessor PCB, which stops 10/20/2023 19:57 Single Boiler...

  • Page 97: Boiler Error Codes

    Part 13 - Troubleshooting B. Boiler Error Codes Possible cause Error Display Error code Error Description Possible Remedies based on priority Type CH Circuit Reset the error by tapping the reset button Ensure boiler is free of air and pressurized to at least Air in the system 20PSI Return filter plugged...
  • Page 98 Part 13 - Troubleshooting Possible cause Error Display Error code Error Description Possible Remedies based on priority Type Reset the error by tapping the reset button. Ensure boiler is free of air and pressurized to at least Air in the system 20PSI.
  • Page 99 Part 13 - Troubleshooting Possible cause Error Display Error code Error Description Possible Remedies based on priority Type Reset the error by tapping the reset button Ensure boiler is free of air and pressurized to at least Air in the system 20PSI If the problem occurs during heating and hot water Failed internal circulator/...
  • Page 100 Part 13 - Troubleshooting Possible cause Error Display Error code Error Description Possible Remedies based on priority Type Ensure the return sensor (near the bottom of the heat Temperature sensor exchanger) is connected to the two blue wires and it disconnected securely clipped on the outlet pipe.
  • Page 101 Part 13 - Troubleshooting Possible cause Error Display Error code Error Description Possible Remedies based on priority Type In systems with high and low temperature zones this The return temperature Normal operation error may be displayed for serval minutes as zones exceeded the supply turn on and off.
  • Page 102 Part 13 - Troubleshooting Possible cause Error Display Error code Error Description Possible Remedies based on priority Type Switch the boiler OFF and ON at the main electrical power supply. Check Menu 2.5.7 0 = OFF , 1 = ON. Setting 2.10.1 Improper settings must be set to 179 when 2.5.7 = 1.
  • Page 103 Part 13 - Troubleshooting Possible cause Error Display Error code Error Description Possible Remedies based on priority Type Reset the error by tapping the Reset button. Incorrect outdoor sensor Disconnect the Outdoor sensor from the PCB and Blocking wiring reset the error. 3 06 PCB internal error (Manual...
  • Page 104 Part 13 - Troubleshooting Possible cause Error Display Error code Error Description Possible Remedies based on priority Type Detected accessory wired to Restore the factory default menu 2.8.0. If the error 4 30 Warning BUS connection persist replace the PCB. Detected accessory wired to Restore the factory default menu 2.8.0.
  • Page 105 Part 13 - Troubleshooting Possible cause Error Display Error code Error Description Possible Remedies based on priority Type Check the flame sensor and wiring for damage,water Blocking Faulty flame sensor or other possible shorts to ground (replace flame Flame detected out of 5 02 (Auto sensor)
  • Page 106 Check the EBUS connection and wires for damage or shorts. EBUS wiring is polarity sensitive and can only EBUS wiring (orange be connected to NTI room sensors, or zone controls, connector) disconnected 0-10VDC clip in module or another EBUS connection on different boiler.
  • Page 107 Part 13 - Troubleshooting Possible cause Error Display Error code Error Description Possible Remedies based on priority Type Two or more boilers in the cascade have the same incorrect settings address. Check menu 0.4.6 and ensure each boiler has a unique address. The control has sensed a short circuit on the BUS BUS connection shorted connection.
  • Page 108 Part 13 - Troubleshooting General Possible cause Symptoms Possible Remedies symptoms based on priority Verify that the boiler call for heat is enabled, and indicated on No thermostat demand the screen of the boiler, the call for heat should be connected to TT1, and or TT2 on the low voltage terminal strip Boiler is in error or lockout, see troubleshooting for the specific Error/ lockout...
  • Page 109 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. FTVN Serie II - Installation - Startup - Maintenance Instructions...

  • Page 110: Part 14 - Maintenance

    Part 14 - Maintenance tank. Immediately contact a qualified service technician to inspect the DANGER boiler and system. Check Exhaust Vent and Intake Pipe Terminations The boiler must be inspected and serviced annually, Verify that the boiler exhaust vent and intake pipe terminations are preferably at the start of the heating season, by a qualified clean and free of obstructions.

  • Page 111: Maintenance Only To Be Performed By A Qualified Service Technician 1 1

    Part 14 - Maintenance C. Maintenance Only to be Performed by a Check Water and Gas Piping 1. Remove the boiler cover and perform a gas leak inspection Qualified Service Technician following Operating Instructions on page 2 of this manual. If Removing the Cabinet Cover and Inspecting the Boiler gas odor or leak is detected, follow procedures on page 2.
  • Page 112 Part 14 - Maintenance 2. Unscrew the two nuts and remove the gas pipe. 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. Failure to do so could result in property damage, personal injury, or death.
  • Page 113 Part 14 - Maintenance 6. Remove the six (6) lock nuts securing the top plate to the heat 4. Restore power and gas to the boiler. Restart the boiler. Check for exchanger. Remove the top plate and burner. leaks in the combustion system. Observe operation for 5 to 10 minutes.

  • Page 114: Replacing Components 1

    Part 14 - Maintenance Check condensate piping for sagging and/or leakage. Repair any D. Replacing Components sags or leaks before restoring power to the boiler. If the boiler has a condensate pump, ensure the pump operates At any point in time over the boiler’s service life it may be necessary properly before considering maintenance complete.
  • Page 115 Part 14 - Maintenance Replacing the Fan Replacing the Main Heat Exchanger 1. Remove the silencer and gas line as described in Cleaning the Heat Drain the boiler and remove the combustion assembly as Exchanger Combustion Chamber. described in Cleaning the Heat Exchanger Combustion 2.
  • Page 116 Part 14 - Maintenance 6. Disconnect the condensate line. DANGER Failure to replace the sealing rings will result in gas leaks, and could cause an explosion or fire, substantial property damage, severe personal injury, or death. Figure 111 - Remove the Condensate Pipe 7.

  • Page 117: After Maintenance Is Complete 1

    Part 14 - Maintenance E. After Maintenance is Complete CAUTION Functional Test In unusually dirty or dusty conditions, care must be taken After maintenance is complete, ensure the CH circuit is filled and to keep boiler cabinet door in place at all times. Failure to purged with a pressure of 12 psi.

  • Page 118: Part 15 - Maintenance Report

    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. Make sure all piping is properly supported. See User’s Information manual for instructions.

  • Page 119: Part 16 - Shutdown

    Part 16 - Shutdown A. Shutdown Procedure Supply/Return Temperature Outdoor Sensor Sensors Tank Sensor Turn the boiler off at the on/off power switch. Wait for the DHW Outlet Sensor combustion blower to stop, so all latent combustion gases are Outside purged from the system.

  • Page 120: Maintenance Notes

    Maintenance Notes 420012001400 - Rev. 09 - 03142024...
  • Page 121 Maintenance Notes FTVN Serie II - Installation - Startup - Maintenance Instructions...

  • Page 123: 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 124 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 Visit us online 420012001400 - Rev. 09 - 03142024...

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