NTI FTVN085 Installation Start-Up Maintenance

NTI FTVN085 Installation Start-Up Maintenance

Residential condensing gas boiler
Table of Contents

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Installation
Start-Up
Maintenance
FTVN085 / FTVN110
FTVN150 / FTVN199
FTVN110C / FTVN150C
FTVN199C Models
87030 Revision Date 5.14.21
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.
FTVN
FTVN

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Summary of Contents for NTI FTVN085

  • Page 1 FTVN FTVN Installation Residential Condensing Gas Boiler Start-Up Maintenance FTVN085 / FTVN110 FTVN150 / FTVN199 FTVN110C / FTVN150C FTVN199C Models Heat Exchanger Bears the ASME “H” Stamp DANGER THIS MANUAL MUST ONLY BE USED BY A QUALIFIED INSTALLER / 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 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 2. Natural Gas Pipe Sizing 3. LP (Liquid Propane) Gas Pipe Sizing Part 1 - General Safety Information B. Gas Connection Requirements A. Operation and Installation Warnings C. Additional Precaution for Excess Flow Valve (EFV) B. Improper Combustion D.
  • 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

    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 Be sure to disconnect electrical power before opening boiler damage, personal injury, or death.
  • Page 8: And Dhw Loop Water Chemistry Requirements

    EPA CH applications. secondary maximum contaminant levels (40 CFR Part 143.3). If NOTE: NTI DOES NOT WARRANT THE BOILER AGAINST FREEZE-RELATED the water contains contaminants higher than outlined by the EPA, DAMAGE.
  • Page 9: Water Temperature Adjustment And Scalding

    Part 1 - General Safety Information CAUTION 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 central heating mode.
  • 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 operation: UNCRATING THE BOILER - Any claims for damage or shortage in Stainless Steel Heat Exchanger shipment must be filed immediately against the transportation The highly efficient stainless steel heat exchanger is designed to company by the consignee.
  • Page 11: Optional Equipment

    Monitors DHW outlet temperature. The control adjusts boiler firing rate to match the 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 (84010) • 3” PVC Concentric Vent Kit (84634) •...
  • Page 12: 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 very as the casing, as well as internal surfaces, such as the heat cold location (BELOW 0 F) before installation, handle with care exchanger, are directly influenced by proximity to damp and salty...
  • Page 13: Leveling

    Part 3 - Prepare the Boiler for Installation Part 1 - General Safety Information NOTE: A combustible door or removable panel is acceptable front Minimum Clearances from Combustible Materials clearance. • Hot water pipes - at least 1” from combustible materials •...
  • Page 14: Wall Mounting Considerations

    Part 1 - General Safety Information Part 3 - Prepare the Boiler for Installation WARNING D. Wall Mounting Considerations These boilers are wall mounted. Use only the wall mounting instructions This wall mounting system is not seismic rated and should not be included with this boiler.
  • Page 15: Exhaust Vent And Intake Pipe

    Part 3 - Prepare the Boiler for Installation Precautions 2. Power Venting, Indoor Combustion Air in Confined or If the boiler is located in a residential garage, per ANSI Z223.1: Unconfined Space • Mount the bottom of the boiler a minimum of 18” above the This boiler requires fresh, uncontaminated air for safe operation and must floor of the garage to ensure the burner and ignition devices be installed in a mechanical room where there is adequate combustion...
  • Page 16: Prevent Combustion Air Contamination

    Part 3 - Prepare the Boiler for Installation When removing an existing boiler, follow the steps below. WARNING 1. Seal any unused openings in the common venting system. 2. Visually inspect the venting system for proper size and horizontal pitch to determine if there is blockage, leakage, corrosion, or other Do not attempt to vent this appliance by any means other than those deficiencies that could cause an unsafe condition.
  • Page 17: Technical Specifications

    Part 3 - Prepare the Boiler for Installation Part 1 - General Safety Information 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 /...
  • Page 18 Part 3 - Prepare the Boiler for Installation Part 1 - General Safety Information 10" 8 " 4 " 4 " 8 " 8 " 4 " B C D 2 " 8 " 4 " 3" 8 " 8 " 4 "...
  • Page 19 Part 3 - Prepare the Boiler for Installation Part 1 - General Safety Information FTVN Components Pressure relief valve Circulation Pump Air purge valve DHW Flow Sensor (Combi Models Only) Boiler outlet temperature sensor Water pressure switch Air pressure switch Modulating Fan Flue gas temperature sensor Boiler inlet temperature sensor...
  • Page 20 Part 3 - Prepare the Boiler for Installation Part 1 - General Safety Information Combi Models Non-Combi Models Pressure relief valve Air purge valve Boiler outlet temperature sensor DHW Temperature Sensor Flue gas temperature sensor Main heat exchanger Flame detection electrode Silencer DHW heat exchanger Condensate trap...
  • Page 21: Part 4 - Water Piping

    An automatic air vent would cause air to leave be connected to an indirect water heater to supply domestic hot the system, resulting in improper operation of the expansion tank. water. NTI offers indirect water heaters in a wide range of gallon sizes in stainless steel construction. Model Heat Exchanger Volume (Gallons) A.
  • Page 22 Part 4 - Water Piping Part 1 - General Safety Information Non-Combi Models Combi Models A. CH Supply 1-1/4” A. CH Supply 1-1/4” B. Supply to Indirect Water Heater 3/4" (Cap if not in use) B. DHW Outlet 3/4" C. Gas Inlet 3/4" C.
  • Page 23: Internal Circulation Pump

    Part 1 - General Safety Information Part 4 - Water Piping E. Internal Circulation Pump To calculate the size of the heating installation refer to the graph below. Graph Representing the Available Circulation Pump Head Available Head vs. Flow Rate Flow Rate [US GPM] Table 10 - Internal Circulation Head Curve...
  • Page 24: And Dhw Pressure Relief Valves

    Part 4 - Water Piping Part 1 - General Safety Information WARNING F. CH and DHW Pressure Relief Valves This boiler has a high-temperature shut-off switch built in as a standard safety feature. Therefore, a “pressure only” relief valve is required. To avoid water damage or scalding due to relief valve operation: DO NOT operate this appliance before the supplied pressure relief •...
  • Page 25: Air Elimination Device

    Part 1 - General Safety Information Part 4 - Water Piping G. Air Elimination Device A micro bubble air elimination device must be installed in every boiler installation. Automatic air vents alone are not an acceptable substitute for a micro bubble air elimination device. Here are a few examples of acceptable devices.
  • Page 26 3. A minimum of 6 pipe diameters of straight pipe shall be installed Figure illustrates the basic plumbing requirements for a FTVN085 / upstream and downstream of all closely spaced tees. FTVN110 / FTVN150 / FTVN199 boiler installation utilizing Primary/ 4.
  • Page 27 4. Install a minimum of 12 diameters of straight pipe upstream of all circulators. On FTVN085 / FTVN110 / FTVN150 / FTVN199 Models Only. 5. VERY IMPORTANT – Minimum flow rates outlined in this manual If the boiler’s DHW connection is not used, cap the fitting as indicated (2 gpm) must be maintained through the heat exchanger to above.
  • Page 28 3. A minimum of 6 pipe diameters of straight pipe shall be installed Figure illustrates the basic plumbing requirements for a FTVN085 / upstream and downstream of all closely spaced tees. FTVN110 / FTVN150 / FTVN199 boiler installation utilizing Primary/ 4.
  • Page 29 Part 1 - General Safety Information Part 4 - Water Piping Primary/Secondary Piping Shown - See Note 2 Figure 18 - Combi Boiler 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 Part 4 - Water Piping Part 1 - General Safety Information WARNING For direct (not primary / secondary) piping applications, the expansion vessel must be placed on the return side of the boiler as illustrated. Placement of flow resticting devices, such as check valves, is prohibited between the boiler return and the expansion vessel.
  • Page 31 Part 1 - General Safety Information Part 4 - Water Piping CAUTION In mixed temperature applications, mixing valves are required for the protection of low temperature loops. Primary/Secondary Piping Shown - See Note 2 Figure 20 - Combi Boiler with Multiple Central Heating Circulators NOTES: NOTE: In piping applications utilizing a single zone, it is recommended 1.
  • Page 32 Part 4 - Water Piping Part 1 - General Safety Information Figure 21 - Combi Boiler with Recirculation NOTES: WARNING 1. This drawing is meant to show piping concept only. Installer is responsible for all equipment and detailing required by local codes. The piping will not support the weight of the circulators.
  • Page 33: Floor Drying Function

    Part 4 - Water Piping J. 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 34: 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 35: 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 36: 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 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 37: Exhaust Vent And Intake Pipe Sizing

    Part 5 - Venting Follow the steps to install exhaust vent pipe into the boiler vent E. Exhaust Vent and Intake Pipe Sizing collar. See Figure 23 for additional details. 1. All models ship with 3” diameter vent pipe exhaust vent and intake NOTE: Clean and dry the boiler connection.
  • Page 38 The following table lists optional exhaust/intake terminations available 15. All piping must be fully supported. Use pipe hangers at a from NTI: minimum of 4 foot intervals to prevent sagging of the pipe where Description Stock Code condensate may form.
  • Page 39 Vent Supplier Vent Material Description Figure Size Part Number Compatibility Roof Wall 2” 196984 (NTI p/n 85062) 26, 30 IPEX (or Equivalent) Low Profile (Wall) 3” 196985 (NTI p/n 84357) 26, 30 2” 196125 27, 31, 38, 42 PVC/CPVC IPEX (or Equivalent) Concentric...
  • Page 40: 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 41 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 42 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 43 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 34. Ensure the wall is fully sealed where the pipes penetrate.
  • Page 44 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 45 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 40 - Two Pipe Roof Venting Detail Figure 41 - Unbalanced Venting - Roof Exhaust Termination Options Concentric Termination...
  • Page 46: 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 47: 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 48: Part 6 - Installing The Condensate Drain

    Part 6 - Installing the Condensate Drain 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 damage the surrounding area. This condensing high efficiency boiler has a condensate removal 5.
  • Page 49: 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 50: 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 51: Internal Wiring Details

    Part 7 - Connecting Electrical Service B. Internal Wiring Details POWER-IN DHW PUMP FUSE 5AT FUSE 5A CN16 CN22 CN26 CN12 CN20 CN19 Figure 54 - Electrical Wiring Diagram...
  • Page 52 Part 7 - Connecting Electrical Service Part 1 - General Safety Information Figure 55 - Ladder Diagram...
  • Page 53 Part 7 - Connecting Electrical Service Part 1 - General Safety Information 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)
  • Page 54 Part 7 - Connecting Electrical Service Part 1 - General Safety Information 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...
  • Page 55: 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 56: 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 To check inlet gas pressure: minimum standards and does not exceed the maximum standards Remove yellow cap from line pressure test point. See Figure of the boiler.
  • Page 57: 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 60 - Control and Display Overview • Boiler Status • Temperature ( F) with bar level Item # Description •...
  • Page 58: 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 62. The boiler.
  • Page 59: User Menu

    C.H. active from 06:00 to 22:00 NOTE: Zone 3 is only applicable P EXT Time program defined by REMOCON room unit or NTI NET app. when using an optional NTI zone controller. Outdoor Reset Curve Slope (only with AUTO function active)
  • Page 60: Info Menu

    Outdoor temperature [°F] 8.3.4 Exhaust flue temperature [°F] 8.7.8 Burner power level [%] 4.3.0/5.3.0 Room temperature [°F] (only with NTI Room Sensor connected) (Zone 1/2) 8.2.5 DHW flow rate [gpm] (Combi Models only) 8.2.2 Actual fan speed [RPM/10] 8.7.9 Burner flame signal Table 27 - Info menu G .
  • Page 61: Automatic Ch 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 62: 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 63: Parallel Shift Of Reset Curve

    Outdoor temperature Part 1 - General Safety Information Part 9 - Controls 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 64: 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 65: 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 To access advanced setup and troubleshooting parameters, it is ONLY BE ACCESSED AFTER ENTERING THE ACCESS CODE.
  • Page 66: Technical Menu - Menu Structure

    Reset Factory Settings Other - 1 BMS - Building Management System settings Other - 2 Only applicable with 0-10V / 4-20mA 11 NTI Zone Controller Parameters Clip-In Board installed 0 General 1 Diagnostics 25 Cascade Manager Parameters 0 General 1 System Settings...
  • Page 67: Complete Menu Parameters

    Part 1 - General Safety Information Part 9 - Controls R. Complete Menu Parameters 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 68 Part 9 - Controls Part 1 - General Safety Information Description Value 3 BOILER CH PARAMETERS - 1 Limited by the absolute values defined by parameters 2.3.3 and 1 Adjustable max CH power percentage 0 - 100 2.3.4, i.e., 0 = min power and 100 = max power.
  • Page 69 Part 1 - General Safety Information Part 9 - Controls Description Value 6 BOILER MANUAL SETTINGS Only to test components 0 Manual mode activation 0 = OFF, 1 = ON 1 Boiler pump control 0 = OFF, 1 = ON Set Parameter 260=1 2 Fan control 0 = OFF, 1 = ON...
  • Page 70 68 - 179 °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 1 SUMMER/WINTER CHANGEOVER 0 S/W function activation 0 = OFF, 1 = ON 1 S/W temperature threshold 50 - 86 °F...
  • Page 71 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 72 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 73 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 74 Part 9 - Controls Part 1 - General Safety Information Description Value 4 Exhaust Flue Temperature (in °F) Only with outdoor sensor 5 Outdoor Temperature (in °F) connected 4 DHW TANK TEMPERATURE (ONLY ACTIVE WITH CONNECTED NTC TANK SENSOR) - Read Only Only with NTC tank sensor 0 Displays current tank temperature (in °F) connected...
  • Page 75: 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 76: 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 77 Part 1 - General Safety Information Part 10 - Start-Up Preparation Figure 75 - Condensate Discharge If the condensate outlet on the boiler is lower than the drain, you 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 78: Part 11 - Start-Up

    Part 1 - General Safety Information Part 11 - Start-Up 5. The exhaust vent piping for combustion products should be suitable WARNING and free from any obstructions. 6. Any necessary ventilation inlets in the room should be open (power FOR YOUR OWN SAFETY READ BEFORE OPERATING vent installation).
  • Page 79 Part 1 - General Safety Information Part 11 - Start-Up WARNING If the value measured corresponds to the value given in the Table 31, max adjustment complete. Otherwise It is required to use a calibrated combustion analyzer to verify continue the setting procedure. final adjustment according to the combustion chart (Table 31).
  • Page 80: 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 81 Part 1 - General Safety Information 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?
  • Page 82: Part 12 - Installation Checklist

    Part 12 - Installation Checklist Part 1 - General Safety Information 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 83: Part 13 - Troubleshooting

    Part 13 - Troubleshooting 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 84 Part 13 - Troubleshooting B. Boiler Error Codes Error Display Description Possible Remedies Type CH Circuit Press the Reset button to clear the Error Code. If Error happens again: Blocking 1 01* Overheat 1. Check for the correct functioning and positioning of the supply and return temperature probes. (Manual 2.
  • Page 85 4 13 Room sensor circuit open or short circuit Zone 3 4 30 Detected accessory wired to BUS If connecting an NTI zone controller to the BUS connection, ensure parameter 11.0.0 = 1. Warning connection 4 31 Ignition and Detection Press the Reset button to clear the error code.
  • Page 86 Part 13 - Troubleshooting Error Display Description Possible Remedies Type This Error Code will go away when the condition is remedied. If Error happens again disconnect the flame detection electrode. Then press Reset. Blocking Flame detected with gas valve 5 02 If the error does not happen again replace the flame detection (Auto closed...
  • Page 87 1. The control has sensed a short circuit on the BUS connection – disconnect field wiring from BUS Incorrect wiring to BUS connection connection. 2. If connecting an NTI room sensor or zone controller to the BUS connection, check for correct EMERG (When in Emergency mode, the polarity and short circuits of the wiring.
  • Page 88: Part 14 - Maintenance

    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 89: Maintenance Only To Be Performed By A Qualified Service Technician

    Part 14 - Maintenance Check Water and Gas Piping 3. If applicable, check the condensate neutralizer and ensure it is full 1. Remove the boiler cover and perform a gas leak inspection following of condensate neutralizing marble chips. Operating Instructions on page 2 of this manual. If gas odor or leak C.
  • Page 90 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 91 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 92: Replacing Components

    Part 14 - Maintenance Check condensate piping for sagging and/or leakage. Repair any Clean the filter with a toothbrush and clean running water. sags or leaks before restoring power to the boiler. Reinstall the DHW inlet filter. If the boiler has a condensate pump, ensure the pump operates Refill the DHW circuit following the filling and purging instructions properly before considering maintenance complete.
  • Page 93 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 94 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 per- sonal injury, or death. Figure 96 - Remove the Condensate Pipe 7.
  • Page 95: After Maintenance Is Complete

    Part 15 - Maintenance Report CAUTION E. After Maintenance is Complete Functional Test In unusually dirty or dusty conditions, care must be taken to After maintenance is complete, ensure the CH circuit is filled and purged with a pressure of 12 psi. Ensure the DHW circuit is filled and keep boiler cabinet door in place at all times.
  • Page 96 Part 15 - Maintenance Report Part 1 - General Safety Information 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 97: Shutdown Procedure

    Part 1 - General Safety Information Part 16 - Shutdown Supply/Return Temperature Sensors A. Shutdown Procedure Outdoor Sensor Tank Sensor Turn the boiler off at the on/off power switch. Wait for the combustion DHW Outlet Sensor blower to stop, so all latent combustion gases are purged from the Outside system.
  • Page 98: Maintenance Notes

    Maintenance Notes...
  • Page 99: 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 100 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 87030 Revision Date 5.14.21...

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