NTI TFTN 085-399 Installation And Operation Manual
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NTI TFTN 085-399 Installation And Operation Manual

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TFTN 085-399
INSTALLATION AND OPERATION MANUAL
Version Date: 2022-09-06
HAZARD SYMBOLS AND DEFINITIONS
Danger Sign: Indicates a hazardous situation which, if not avoided, will result in serious
injury or death.
Warning Sign: Indicates a hazardous situation which, if not avoided, could result in
serious injury or death.
Caution Sign plus Safety Alert Symbol: Indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
Caution Sign without Safety Alert Symbol: Indicates a hazardous situation which, if not
avoided, could result in property damage.
Notice Sign: Indicates a hazardous situation which, if not avoided, could result in property
damage.
This Boiler must be installed by a licensed and trained Heating Technician, or the
Warranty is Void. Failure to properly install this unit may result in property damage,
serious injury to occupants, or possibly death.
NTI # 87137

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  • Page 1 TFTN 085-399 INSTALLATION AND OPERATION MANUAL Version Date: 2022-09-06 HAZARD SYMBOLS AND DEFINITIONS Danger Sign: Indicates a hazardous situation which, if not avoided, will result in serious injury or death. Warning Sign: Indicates a hazardous situation which, if not avoided, could result in serious injury or death.

  • Page 2: Table Of Contents

    Installation and Operation Manual TFTN 085-199 Table of Contents 1.0 INTRODUCTION ................................4 1.1 G .......................... 4 ENERAL NSTALLATION EQUIREMENTS 1.2 U ..............................4 ESPONSIBILITIES 1.3 I ............................4 NSTALLER ESPONSIBILITIES 1.4 B ..........................5 EFORE PERATING WITH ROPANE 1.5 B ...........................
  • Page 3 TFTN 085-199 Installation and Operation Manual Read Before Proceeding If you do not follow these instructions exactly, a fire or explosion may result causing property damage, serious injury or death. FOR YOUR SAFETY, READ BEFORE OPERATING_ A) This boiler does not have a pilot. It is equipped with an ignition device which automatically lights the burner.

  • Page 4: Introduction

    General Installation Requirements The installation of your NTI TFTN gas-fired boiler must conform to the requirements of this manual, your local authority, and the National Fuel Gas Code ANSI Z223.1 and or CAN/CGA B149 Installation Codes. Where required by the Authority, the installation must conform to the standard for “Controls and Safety Devices for Automatically Fired Boilers ANSI/ASME...

  • Page 5: Before Operating With Propane

    TFTN 085-199 Installation and Operation Manual Before Operating with Propane TFTN boilers are factory set to operate with Natural Gas; BEFORE OPERATING WITH PROPANE, the boiler must be converted using the appropriate Natural Gas to LP Conversion Kit; see below. Failure to properly convert the unit to safely operate with Propane will cause dangerous burner operation, resulting in property damage, serious injury or death.

  • Page 6: In The State Of Massachusetts

    Installation and Operation Manual TFTN 085-199 In the State of Massachusetts (a) For all horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned and operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied: INSTALLATION OF CARBON MONOXIDE DETECTORS At the time of installation of the side wall...

  • Page 7: Specifications

    TFTN 085-199 Installation and Operation Manual 2.0 SPECIFICATIONS Table 2-1 Specifications DESCRIPTION TFTN085 TFTN110 TFTN150 TFTN199 TFTN285 TFTN340 TFTN399 CSA Input Modulation 8.5 - 85 11 - 110 15 - 150 19.9 - 199 28.5 - 285 39.9 - 340 39.9 - 399 [MBH] Heating Capacity [MBH]...

  • Page 8: Dimensions

    Installation and Operation Manual TFTN 085-199 Dimensions Figure 2-1 Boiler Dimension (TFTN085-110) Connection/Description Size Connection/Description Size A – Central Heating Supply 1-1/4 in. C – Gas Inlet 3/4 in. B – Central Heating Return 1-1/4 in. D – Condensate Drain * Condensate trap is factory installed inside the boiler, connect drain to drain tube supplied with the boiler.
  • Page 9 TFTN 085-199 Installation and Operation Manual Figure 2-2 Boiler Dimension (TFTN150-199) Connection/Description Size Connection/Description Size A – Central Heating Supply 1-1/4 in. C – Gas Inlet 3/4 in. B – Central Heating Return 1-1/4 in. D – Condensate Drain * Condensate trap is factory installed inside the boiler, connect drain to drain tube supplied with the boiler.
  • Page 10 Installation and Operation Manual TFTN 085-199 Figure 2-3 Boiler Dimension (TFTN285) Connection/Description Size Connection/Description Size A – Central Heating Supply 1-1/4 in. C – Gas Inlet 3/4 in. B – Central Heating Return 1-1/4 in. D – Condensate Drain * The condensate trap is shipped separately with the boiler, and must be field installed; see section 6.0.
  • Page 11 TFTN 085-199 Installation and Operation Manual Figure 2-4 Boiler Dimension (TFTN340-399) Connection/Description Size Connection/Description Size A – Central Heating Supply 1-1/2 in. C – Gas Inlet 3/4 in. B – Central Heating Return 1-1/2 in. D – Condensate Drain * The condensate trap is shipped separately with the boiler, and must be field installed; see section 6.0.

  • Page 12: Boiler Location

    Installation and Operation Manual TFTN 085-199 3.0 BOILER LOCATION In all cases, the TFTN boiler must be installed indoors in a dry location where the ambient temperature must be maintained above freezing and below 100F [38C]. All boiler components must be protected from dripping, spraying water, or rain during operation and servicing.

  • Page 13: Boiler Area Ventilation Air Openings

    TFTN 085-199 Installation and Operation Manual Boiler Area Ventilation Air Openings Direct Vent – If boiler area clearances are less than the recommended clearances specified in Figure 3-1, the boiler area must be ventilated (Exception: if the boiler area/room has a volume of 150 ft or greater, ventilation of the boiler room is not required).
  • Page 14 Installation and Operation Manual TFTN 085-199 Figure 3-2 Wall Mounting Instructions   Locate the wall mounting brackets and With the help of an assistant, hang the boiler on the upper hardware furnished with the boiler. wall mount bracket. Align the openings in the back of the boiler with the hooks of the wall mount bracket.

  • Page 15: General Venting

    Exhaust and Air Intake are to be piped separately. The TFTN cannot share a common vent or air intake with multiple boilers unless the common venting system has been certified by NTI (Contact NTI for details). Failure to comply will result in serious injury or death.

  • Page 16: Flammable Solvents And Plastic Piping

    Installation and Operation Manual TFTN 085-199 Table 4-1 Corrosive Products and Contaminant Sources Products to Avoid Contaminated Sources to Avoid Antistatic fabric softeners, bleaches, detergents, cleaners Laundry facilities Perchloroethylene (PCE), hydrocarbon-based cleaners Dry cleaning facilities Chemical fertilizer, herbicides/pesticides, dust, methane gas Farms or areas with livestock and manure Paint or varnish removers, cements or glues, sawdust Wood working or furniture refinishing shops...

  • Page 17: Boiler Exhaust & Air-Intake Vent Pipe Connectors

    TFTN 085-199 Installation and Operation Manual Boiler Exhaust & Air-Intake Vent Pipe Connectors The TFTN employs universal exhaust and air-intake connectors that accept PVC/CPVC or Polypropylene (or in the case of the TFTN340-399, Stainless-Steel) special gas vent; see Figure 4-1. Note: When inserting the vent pipe into the connector, verify that the gasket is lubricated and properly seated, and that pipe ends are cut square and beveled at approximately 1/8 in.

  • Page 18: Vent Pipe Material

    Installation and Operation Manual TFTN 085-199 Figure 4-1 Exhaust & Air-Intake Connections TFTN085-285 TFTN340-399 Exhaust CPVC Air-Intake Transition Exhaust Pipe* Air-Intake CPVC Transition Pipe* * CPVC Transition Pipe (included) is mandatory when venting with PVC. Vent Pipe Material Table 4-3 Acceptable Exhaust and Air-Intake Vent Pipe Material Venting System Standards 2, 3 Items...

  • Page 19: Exhaust And Air-Intake Vent Size & Length

    TFTN 085-199 Installation and Operation Manual The use of double-wall vent or insulated material for the combustion air intake pipe is recommended in cold climates to prevent the condensation of airborne moisture on the incoming combustion air pipe. Exhaust and Air-Intake Vent Size & Length TFTN085-285 models are equipped with 3 in.
  • Page 20 TFTN 085-199 Optional Termination Kits Kits certified with the TFTN are listed in Table 4-7 and available from the manufacturers listed in Table 4-6. Kits with an NTI part number listed in Table 4-7, are available directly from NTI. Table 4-6 Optional Termination Kit OEMs...
  • Page 21 TFTN 085-199 Installation and Operation Manual Termination Options – Direct Vent Installation Figure 4-2(a) Two-pipe (Sidewall) Figure 4-2(b) Low Profile (Sidewall) Exhaust Air-Intake Air-Intake Exhaust Location of exhaust and air-intake connections Location of exhaust and air-intake connections vary between models, see Figure 4-1. vary between models, see Figure 4-1.
  • Page 22 Installation and Operation Manual TFTN 085-199 Figure 4-2(e) Two-pipe (Roof) Figure 4-2(f) IPEX Concentric (Roof) Exhaust Air-Intake Exhaust Air-Intake Location of exhaust and air- Location of exhaust and air- intake connections vary between intake connections vary between models; see Figure 4-1. models;...
  • Page 23 TFTN 085-199 Installation and Operation Manual Sidewall Termination Details Figure 4-3(a) Figure 4-3(b) Two-Pipe Termination (Sidewall) IPEX Concentric Termination (Sidewall) Horizontal 4-12” or greater Refer to documentation included with termination kit for than 36” complete installation instructions. Exhaust Exhaust Exhaust Air-inlet Vertical Min.
  • Page 24 Installation and Operation Manual TFTN 085-199 Roof Termination Details Figure 4-4(a) Figure 4-4(b) Two-Pipe Termination (Roof) IPEX Concentric Termination (Roof) Exhaust Refer to documentation included with termination kit for Vent Screen complete installation instructions. Vent pipe piece to retain vent screen Vent pipe piece to retain vent screen Air-inlet...

  • Page 25: Power Vent / Indoor Combustion Air (Non-Direct Vent)

    Combustion air containing chemicals such as chloride, fluoride, bromine or iodine or dust and debris will cause corrosion damage of the heat exchanger voiding your NTI warranty. Refer to Table 4-1 for a list of corrosive products and contaminants sources to avoid.
  • Page 26 Installation and Operation Manual TFTN 085-199 Figure 4-5 Venting Below Grade For installations that exit the wall below grade: Excavate site to a point below where the pipes are Exhaust to exit as shown. Ensure the wall is fully sealed where the pipes penetrate.

  • Page 27: Vent Termination Clearances

    TFTN 085-199 Installation and Operation Manual 5.0 VENT TERMINATION CLEARANCES The lettered vent termination clearances A through M illustrated in Figure 5-1 are described in Table 5-1; abide by these minimum vent terminal clearances while following the instructions detailed in section 4.0 –...
  • Page 28 Installation and Operation Manual TFTN 085-199 Table 5-1 Vent Termination Clearances (…Continued) Canadian installations US installation Clearance to unventilated soffit Not applicable Not applicable Clearance to outside corner Not applicable Not applicable Clearance to inside corner 36 in (91 cm) 36 in (91 cm) Clearance to each side of center line extended above 3 ft (91 cm) within a height...

  • Page 29: Condensate Drain

    TFTN 085-199 Installation and Operation Manual 6.0 CONDENSATE DRAIN This unit produces liquid condensate in the heat exchanger and venting system as a product of combustion. Steps must be taken to ensure condensate does not collect in the venting system; therefore, all exhaust piping must slope back to the boiler a minimum 1/4”...
  • Page 30 Installation and Operation Manual TFTN 085-199 For TFTN285-399 models the Siphon is shipped loose inside the boiler cabinet and must be connected to the bottom of the boiler as described below and in Figure 6-2: 1. Inspect Siphon to ensure all parts were shipped with the assembly. The Siphon must be periodically disassembled and cleaned as part of a regular maintenance plan.

  • Page 31: Installing Gas Piping

    Ensure that: • The gas line connection to the boiler does not apply any weight to the gas valve. NTI recommends using approved flexible gas piping (if acceptable by local codes) to connect the boiler to the gas supply (See Figure 7-1 for details).
  • Page 32 Installation and Operation Manual TFTN 085-199 Strain on the gas valve and fittings may result in vibration, premature component failure and leakage and may result in a fire, explosion, property damage, serious injury or death. Do not use an open flame to test for gas leaks. Failure to follow these instructions may result in fire, property damage, serious injury or death.

  • Page 33: Lighting The Boiler

    TFTN 085-199 Installation and Operation Manual 8.0 LIGHTING THE BOILER Before Start-up refer to Mandatory Pre-commissioning Procedure for Plastic Venting in Section 4.0. Failure to follow these instructions can result in explosions, injury or death. Prior to turning the gas supply on and lighting the boiler, ensure all aspects of the installation are complete and in conformance with the instructions provided in this manual, including the Exhaust/Air Intake, Condensate Drain, and System Water Piping.
  • Page 34 EXTREME ELECTRICAL SHOCK possibly causing serious injury or death. If the unit fails to light consistently and smoothly, contact NTI for technical assistance at 1-800- 688-2575. Never allow the boiler to operate if the ignition or operation of the burner is rough or erratic.

  • Page 35: Gas Valve And Burner Set-Up

    TFTN 085-199 Installation and Operation Manual 9.0 GAS VALVE AND BURNER SET-UP Set-up of the TFTN gas valve must be performed by a licensed Gas Technician. Failure to perform the set-up correctly may result in incorrect operation, component failure, property damage, serious injury or death.
  • Page 36 Installation and Operation Manual TFTN 085-199 Adjustments to the Offset Screw may only be made by a qualified gas technician using a calibrated combustion analyzer capable of measuring CO and CO, and only with the burner operating at Min Power (10%). Attempting to set the Offset Screw while the burner is operating above Min Power will result in incorrect combustion and may lead to burner damage or excessive CO.
  • Page 37 TFTN 085-199 Installation and Operation Manual Figure 9-1 Placing the Boiler in Firing Rate Test Mode    Select Test Mode from the Setup menu Select Setup from the home screen Note: if prompted, you will need to enter the password, “ntinet”, see Setup Wizard section.
  • Page 38 Installation and Operation Manual TFTN 085-199 Figure 9-1 Placing the Boiler in Firing Rate Test Mode (…Continued)  Verify Burner Power goes to 10% before proceeding with Min  Power combustion calibration (see Table 9-1). Select Press to Stop Test upon completing the combustion calibration procedure.
  • Page 39 TFTN 085-199 Installation and Operation Manual Figure 9-3 TFTN285-399 Gas Valve Adjustment (TFTN340-399 Illustrated) Offset Screw – used to set Remove access cover, adjust from top. combustion at Min Power (10%) Use 2 mm hex wrench Throttle Screw – used to calibrate combustion at Max Power (100%) Gas Valve Line Pressure...

  • Page 40: Boiler And Heating System Piping

    Failure to follow the instructions provided in this section will void the NTI warranty and may result in property damage, fire, serious injury or death.
  • Page 41 TFTN 085-199 Installation and Operation Manual Glycol, Snow Melt, and Oxygen Permeable Piping – When freeze protection is required, only multi metal inhibited propylene glycol, at a minimum of 20% and a maximum of 50%, is allowed for use with boiler system. If the boiler is being used with a snow melt system that requires a concentration of glycol higher than 50%, then a plate heat exchanger is required to separate the snow melt system from the boiler water.

  • Page 42: Near Boiler Plumbing

    Generate a burner demand; the burner should not fire and error “LWCO Open” should appear on the screen. Contact NTI for assistance if this does not happen. 2. Fill the boiler with water; the “LOW WATER” LED should turn off. Press the TEST/RESET button on the LWCO to reset the circuit –...
  • Page 43 TFTN 085-199 Installation and Operation Manual Figure 10-1(a) Near Boiler Piping (TFTN085-199) Relief Valve Auto Air Vent Optional Inlet Optional Outlet Outlet Inlet Figure 10-1(b) Near Boiler Piping (TFTN285) Relief Valve Auto Air Vent Optional Outlet Outlet Optional Inlet Inlet Figure 10-1(c) Near Boiler Piping (TFTN340-399) Relief Valve...

  • Page 44: Boiler System Plumbing

    (See Table 10-2 for minimum flow rate requirements). To ensure the minimum flow rate is attained, NTI strongly recommends installing the boiler in a “Primary/Secondary” plumbing configuration utilizing “Closely Spaced Tees” or a “Low Loss Header” to de-couple the Boiler-Primary loop from the System-Secondary loop(s). See the examples of Primary/Secondary Loop configurations in Figures 10-3 through 10-8.
  • Page 45 TFTN 085-199 Installation and Operation Manual Air Removal – The boiler and system plumbing layout must be configured to promote the removal of air from the water. Air vents and bleeders must be strategically placed throughout the system to aid in purging the air from the system during commissioning of the boiler.
  • Page 46 Installation and Operation Manual TFTN 085-199 Figure 10-2(b) TFTN285 Head Loss Curve Figure 10-2(c) TFTN340-399 Head Loss Curve...
  • Page 47 TFTN 085-199 Installation and Operation Manual Table 10-3 Circulator and Pipe Size Requirements Typical Primary Loop Pump Size Temp. Boiler Flow Boiler Head Min. Pipe Model Rise (°F) Rate (GPM) Loss (ft.) Size (in.) B&G Grundfos Taco Armstrong NRF-22 UPS15-58 0015-MS Astro 30 TFTN085...
  • Page 48 Installation and Operation Manual TFTN 085-199 Figure 10-3 Plumbing Schematic – CH Zone Valves & Upstream IWH (Option A) NOTES: 1. For ZONE 1-3 to output 24VAC (like in this example), jumper ZONE INPUT to R (24V). 2. CH PUMP and DHW PUMP are each responsible for circulating water through the boiler, so size accordingly (see Table 10.3). 3.
  • Page 49 TFTN 085-199 Installation and Operation Manual Figure 10-4 Plumbing Schematic – CH Zone Valves & Upstream IWH (Option B) NOTES: 1. For ZONE 1-3 to output 24VAC (like in this example), jumper ZONE INPUT to R (24V) 2. The BOILER PUMP is responsible for circulating water through the boiler, so size accordingly (see Table 10.3). 3.
  • Page 50 Installation and Operation Manual TFTN 085-199 Figure 10-5 Plumbing Schematic – CH Zone Valves & Downstream IWH NOTES: 1. For ZONE 1-3 to output 24VAC (like in this example), jumper ZONE INPUT to R (24V) 2. The BOILER PUMP is responsible for circulating water through the boiler, so size accordingly (see Table 10.3). 3.
  • Page 51 TFTN 085-199 Installation and Operation Manual Figure 10-6 Plumbing Schematic – CH Zone Pumps & Upstream IWH (Option A) NOTES: 1. For ZONE 1-3 to output 120VAC (like in this example), jumper ZONE INPUT to 120V 2. CH PUMP and DHW PUMP are each responsible for circulating water through the boiler, so size accordingly (see Table 10.3). 3.
  • Page 52 Installation and Operation Manual TFTN 085-199 Figure 10-7 Plumbing Schematic – CH Zone Pumps & Upstream IWH (Option B) NOTES: 1. For ZONE 1-3 to output 120VAC (like in this example), jumper ZONE INPUT to 120V 2. The BOILER PUMP is responsible for circulating water through the boiler, so size accordingly (see Table 10.3). 3.
  • Page 53 TFTN 085-199 Installation and Operation Manual Figure 10-8 Plumbing Schematic – CH Zone Pumps & Downstream IWH NOTES: 1. For ZONE 1-3 to output 120VAC (like in this example), jumper ZONE INPUT to 120V 2. The BOILER PUMP is responsible for circulating water through the boiler, so size accordingly (see Table 10.3). 3.

  • Page 54: Cascade Installation

    Follower Boilers. 6. System Sensor (mandatory) – install a system sensor (NTI P/N: 84010) on the common outlet (supply) pipe feeding the heating system and wire it to the AUX1 NTC input of the boiler that will be set as Manager; see Figure 11-1.
  • Page 55 TFTN 085-199 Installation and Operation Manual Figure 11-1(a) Cascade Plumbing Schematic – CH Zone Pumps FUTURE NOTES: 1. For ZONE 1, ZONE 2 & ZONE 3 to output 120VAC (like in this example), jumper ZONE INPUT to 120V. 2. Pumps responsible for circulating water through the boiler must be sized accordingly (see Tables 10-2 & 10-3). 3.
  • Page 56 Installation and Operation Manual TFTN 085-199 Figure 11-1(b) Cascade Plumbing Schematic – CH Zone Valves (DHW Pump) FUTURE NOTES: 1. For ZONE 1, ZONE 2 & ZONE 3 to output 24VAC (like in this example), jumper ZONE INPUT to R (24V). 2.
  • Page 57 TFTN 085-199 Installation and Operation Manual Figure 11-1(c) Cascade Plumbing Schematic – CH & DHW Zone Valves FUTURE NOTES: 1. For ZONE 1, ZONE 2 & ZONE 3 to output 24VAC (like in this example), jumper ZONE INPUT to R (24V). 2.

  • Page 58: Setup Procedure

    Installation and Operation Manual TFTN 085-199 Table 11-1 Minimum Pipe Sizes for Multiple Boiler Applications # of Units TFTN085 TFTN110 TFTN150 TFTN199 TFTN285 TFTN340 TFTN399 1-1/4 in. 1-1/4 in. 1-1/2 in. 2 in. 2 in. 2 in. 2-1/2 in. 1-1/4 in. 1-1/2 in.
  • Page 59 TFTN 085-199 Installation and Operation Manual Set Boiler Address – turn the power on to each boiler and set the Boiler Address from the Cascade Setup menu. The boiler chosen for connecting the System Sensor (and if applicable Outdoor, DHW Recirc or Buffer Tank Sensors and System Pump) must be set as Manager, while the others must be set uniquely as Follower Boiler 1, 2…7.
  • Page 60 Installation and Operation Manual TFTN 085-199 BUS Connection – with the power turned off to all boilers, wire the BUS connections of each boiler together in parallel (i.e., daisy-chained). Make sure to maintain correct polarity of B and T terminals. See Figure 11-1. Turn Power On to all Boilers •...
  • Page 61 TFTN 085-199 Installation and Operation Manual Configure System Sensor Input – from the Sensor Configuration menu of the Manager boiler, set Auxiliary Sensor 1 = System Sensor; see Figure 11-5. Figure 11-5 Configuring System Sensor Input    Select Setup from the home screen Select Tech Menu from the Setup menu...

  • Page 62: Field Wiring

    Installation and Operation Manual TFTN 085-199 12.0 FIELD WIRING All wiring must be in accordance with the Canadian Electrical code CSA C22.1 and/or the National Electrical Code ANSI/NFPA 70, local codes, and this manual. NOTICE: the boiler must be electrically grounded. The electrical rating of the TFTN is 120V / 1 Phase / 60 Hz / 12A.
  • Page 63 NEUTRAL 120VAC loads, e.g., zone pumps. ZONE OUTPUTS – engage when a CH demand is applied to the respective T-STAT input (or via NTI Room ZONE 1 Sensor configured to an individual zone). Output voltage is sourced from ZONE INPUT. When the...
  • Page 64 • Buffer Tank – input for optional buffer tank temperature sensor, so that the boiler can directly control the temperature of an external buffer tank. Sensor must be 10k beta = 3977 NTC; an optional strap-on System Sensor is available from NTI (P/N 84010).
  • Page 65 Connection is used to connect to other NTI devices such as NTI Room Sensors, NTI Zone Controller (N-Link ZC3), or to cascade to other NTI boilers. Take care to maintain the same polarity of B and T connections at each device.
  • Page 66 1. For ZONE 1-3 to output 24VAC (like in this example), jumper ZONE INPUT to R (24V). 2. NTI Room Sensors can be used in place of convential room thermostats. Daisy-chain B & T of each sensor to BUS terminals B &...
  • Page 67 1. For ZONE 1-3 to output 120VAC (like in this example), jumper ZONE INPUT to 120V. 2. NTI Room Sensors can be used in place of convential room thermostats. Daisy-chain B & T of each sensor to BUS terminals B &...

  • Page 68: Wiring Schematics

    Installation and Operation Manual TFTN 085-199 13.0 WIRING SCHEMATICS Figure 13-1 Connection Diagram...
  • Page 69 TFTN 085-199 Installation and Operation Manual Figure 13-2 Ladder/Logic Diagram...

  • Page 70: Installation Checklist

    Installation and Operation Manual TFTN 085-199 14.0 INSTALLATION CHECKLIST Installation  1. If operating on Propane Gas, convert boiler using the appropriate Natural to LP Conversion Kit; see section 1.4 Before Operating with Propane.  2. Locate the boiler in accordance with section 3.0 BOILER LOCATION.

  • Page 71: Annual Maintenance And Inspection

    Combustion Chamber Cleaning Procedure NTI recommends having the combustion chamber cleaned after the first year of operation, with subsequent cleanings scheduled based on the condition of the combustion chamber at the time. Units operating with LP Gas or in an industrial environment may require more frequent cleanings.
  • Page 72 Installation and Operation Manual TFTN 085-199 Refractory Ceramic Fibers (RFC) Personal Protective Equipment Recommended - Read the following warnings and handling instructions carefully before commencing any service work in the combustion chamber. The insulating material on the inside of the burner plate contains Refractory Ceramic Fibers and should not be handled without personal protective equipment.

  • Page 73: Display Menu Guide

    TFTN 085-199 Installation and Operation Manual 16.0 DISPLAY MENU GUIDE Initial Power-up Immediately following power-up of the boiler, the system will go through a process of “Device Discovery”, where the devices connected to the boiler are discovered. This is followed by an “Initializing” process. Figure 16-1 Initial Power-up After device discovery and initializing, the controller performs an air purge sequence that is designed to purge air from the boiler water.

  • Page 74: Home Screen

    Off – boiler will only operate for Anti-freeze function (if set to Enabled) 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 be heated by the Anti-legionella Function (if set to On), or DHW frost protection (tank temp <...

  • Page 75: Setup

    TFTN 085-199 Installation and Operation Manual 16.3 Setup Figure 16-5 Setup Menu Setup Wizard – select to Test Mode – select to have the system walk you access the Burner & Output through a step-by-step Test screens or the Air setup procedure of the Purge activation button controller...
  • Page 76 Installation and Operation Manual TFTN 085-199 Figure 16-6 (Continued) Setup Wizard       Select the type of radiation for the 1 zone (i.e., zone The control will select default settings based on the type of connected to T-STAT #1 input and ZONE 1 output), then radiation selected, adjust if desired then press Next.

  • Page 77: Tech Menu

    TFTN 085-199 Installation and Operation Manual 16.3.2 Tech Menu All technical parameters of the main controller are accessed from the Tech Menu. Note: if you have not entered the “ntinet” passcode within the last 30 minutes, you will be asked to enter it again upon selecting Tech Menu;...
  • Page 78 Installation and Operation Manual TFTN 085-199 16.3.2.1 CH Setup Navigate the Central Heat menus as illustrated in Figure 16-8. Tables 16-1 through 16-5 provide a description of each menu option. Figure 16-8 CH Setup Menus Go to User Menu Takes you directly to the User Menu for the respective Zone Selection.
  • Page 79 Zone Selection Allows selection of the zone that you would like to view/modify; options are Z1 (zone 1), Z2, Z3 & Buffer Tank. Options extend to Z4, Z5 & Z6 if using an NTI N-Link ZC3 zone controller. Max Temperature 4.2.5 Sets the allowable operating outlet water temperature range of the 140°F...
  • Page 80 Installation and Operation Manual TFTN 085-199 Table 16-3 CH Setup – Advanced Settings (Applicable to selected zone) Setting Parameter* Range/Description Factory Setting Zone Selection See Table 16-1 Heating Curve 4.2.2 Sets the slope of the heating curve. The greater the slope, the quicker the Slope boiler target temperature raises as the outdoor temperature decreases.
  • Page 81 Only applicable when using an NTI Room Sensor. (Range = 50-90°F) * Parameter numbers starting with 4 are for Zone 1; substitute the 4 with a 5 (for Zone 2); 6 (for Zone 3); 14 (for Zone 4);...
  • Page 82 Installation and Operation Manual TFTN 085-199 16.3.2.2 DHW Setup Navigate the DHW menus as illustrated in Figure 16-9. Tables 16-6 through 16-8 provide a description of each menu option. Figure 16-9 DHW Setup Go to User Menu Takes you directly to the user DHW settings menu (i.e., User Menu with Zone Selection = DHW).
  • Page 83 TFTN 085-199 Installation and Operation Manual Table 16-8 DHW Setup – Advanced Settings Setting Parameter Range/Description Factory Setting Tank On Differential 24.21.0 Sets how much the DHW storage tank temperature can drop below target before initiating a DHW demand. Only applicable when using a Tank Sensor.
  • Page 84 Installation and Operation Manual TFTN 085-199 16.3.2.3 Cascade Setup The Cascade Setup menu must be accessed to set the Boiler Address of each boiler that will be configured as part of a cascade system; see section 11.0 CASCADE INSTALLATION. Once the cascade system is configured, the Cascade Setup menu of the Manager boiler can be accessed to modify the operation of the cascade system.
  • Page 85 2. The parameter number for some Follower boiler settings will begin with 26-32 (instead of 24 or 25); 26 for Follower Boiler 1, 27 for Follower Boiler 2 and so on. Follower boiler settings are available from the “NTI net” webapp, and...
  • Page 86 Installation and Operation Manual TFTN 085-199 16.3.2.4 Pump Control Settings Access the Pump Control Settings screen to set the overrun time of the boiler, system, and zone pump outputs, configure AUX1 & AUX2 PUMP outputs, or to setup the variable speed pump control. Note: the overrun time for the DHW pump output is configured from the DHW Setup ->...
  • Page 87 TFTN 085-199 Installation and Operation Manual Table 16-10 Pump Control Settings (…Continued) Setting Parameter Range/Description Factory Setting Auxiliary 24.7.0 Sets the functionality of output AUX1 PUMP. None Pump 1 System Pump – powers during CH demands. Will also power during Selection Downstream IWH demands if System Pump Activation Logic, in the Advanced Settings screen of the...
  • Page 88 Installation and Operation Manual TFTN 085-199 Figure 16-12 BMS Control Menu Table 16-11 BMS Control Setting Parameter Range/Description Factory Setting Control Mode 42.0.0 Sets the external modulation control of a Building Management Disabled System, providing a varying 0-10V input signal to terminals 0-10V IN. 0-10V / Temp –...
  • Page 89 TFTN 085-199 Installation and Operation Manual 16.3.2.6 Restore/Backup The factory settings are stored in memory in the PCB and can be restored at any time using the “Reset PCB to Factory Defaults Settings” option. After 30 minutes of the boiler first being powered on, the PCB settings are automatically backed up to the display memory for future use (i.e., in the event the PCB is replaced).
  • Page 90 The Complete Menu provides a direct access to all PCB parameters, including some that are not accessible from the other menus, and are generally only accessed by NTI technicians or installers needing to access advanced features. Parameters can be selected by scrolling the complete parameter list, or by entering the specific parameter number directly.
  • Page 91 AUX1 NTC for direct boiler control of the temperature of an external buffer tank. Sensor must be 10k beta = 3977 NTC; an optional strap-on System Sensor is available from NTI (P/N 84010). Auxiliary 24.6.2 Sets the functionality of input AUX2 NTC.

  • Page 92: User Menu

    7-day time program schedule for the selected zone. The same schedule can be viewed/edited (or created) by the end user via the “NTI net” mobile App if the boiler is registered to his/her account. Note: The View/Edit Schedule menu is reserved for a newer release of the display software and is presently not accessible.
  • Page 93 Allows selection of the zone that you would like to view/modify; options are Z1, Z2, Z3, DHW, DHW Recirc & Buffer Tank. Note: options extend to Z4, Z5 & Z6 if using an NTI N-Link ZC3 zone controller, or for cascade application.
  • Page 94 Allows selection of the zone that you would like to view/modify; options are Z1, Z2, Z3, DHW, DHW Recirc & Buffer Tank. Note: options extend to Z4, Z5 & Z6 if using an NTI N-Link ZC3 zone controller, or for cascade application. Modulation Setpoint 24.20.0...
  • Page 95 Allows selection of the zone that you would like to view/modify; Buffer options are Z1, Z2, Z3, DHW, DHW Recirc & Buffer Tank. Tank Note: options extend to Z4, Z5 & Z6 if using an NTI N-Link ZC3 zone controller, or for cascade application. Buffer Setpoint 20.0.3 Buffer tank setpoint during Comfort time period.

  • Page 96: Test Mode

    Installation and Operation Manual TFTN 085-199 16.3.4 Test Mode The Test Mode is a technical menu and therefore requires the user to enter the passcode “ntinet” if it had not been entered within the last 30 minutes; see Setup Wizard section for details.

  • Page 97: Connectivity

    19.0.3 Set to "On" to have the time automatically set via the internet connection based on the boiler's entered address. Note: the address is entered when registering the boiler to an “NTI net” End User or Service Center. Internet 19.0.4 Set to "On"...

  • Page 98: Diagnostics

    Installation and Operation Manual TFTN 085-199 16.3.6 Diagnostics The Diagnostics menu provides access to the Maintenance Warning feature (Service), boiler operating statistics (Statistics), display and PCB software versions (Version), and a list of the open-source licenses used by the display (Software License). Figure 16-19 Diagnostics Menu Software License Provides the open-source licenses...

  • Page 99: Zone Details

    (applicable for cascade system or with N-link 3ZC). Room Temp – current room temperature (only applicable for zones using NTI Room Sensor) Active – status of the zone input; turns green when the zone is calling, and the Priority Level is current Boiler Target –...

  • Page 100: Cascade

    Installation and Operation Manual TFTN 085-199 16.6 Cascade Figure 16-22 Cascade Details Screen Inlet water pressure of lead Operating Mode selection boiler WiFi weather conditions Size of cascade – sum of all boilers in cascade Outdoor temp – press to Inlet temperature of lead select Internet Weather or boiler...

  • Page 101: Errors

    TFTN 085-199 Installation and Operation Manual 16.7 Errors Active errors and error history are listed on the respective menu option screen selectable from the Errors menu. Each screen lists the type of error (Warning or Blocking Error), timestamp when each occurred, fault description, and device (Boiler, Manager, Boiler Slave 1,2…7) the error occurred on Figure 16-23 Errors Menu Scroll –...

  • Page 102: Wifi Connection

    Before proceeding, download the “NTI net” mobile app to your smartphone and login with your “NTI net” credentials. The app guides you through the process of connecting the boiler to the local WiFi Network and registering it to your “NTI net”...
  • Page 103 Select Yes to connect the boiler to the internet.   Upon confirming a WiFi network (Figure 16-13 step 4), the When this popup appears, the “NTI net” app will prompt display shows the progress of the connection you to Join “Remote Gw Thermo”; see Figure 16-13 ...
  • Page 104 Installation and Operation Manual TFTN 085-199 Figure 17-4 “NTI net” App – Making WiFi Connection and Registering Product      Press Join to connect Wait while the app Select the WiFi Enter the password Wait while the...

  • Page 105: Troubleshooting

    TFTN 085-199 Installation and Operation Manual 18.0 TROUBLESHOOTING Observe the following precautions when servicing the boiler. Failure to comply with these may result in fire, property damage, serious injury or death. Before Servicing the Boiler • Disconnect or shutoff all energy sources to the boiler: 120VAC power, water, and gas. •...
  • Page 106 Installation and Operation Manual TFTN 085-199 Figure 18-2 Boiler Temperature in Range Outlet Temp – if higher than ON temp the burner will not attempt to reignite. If using a System Sensor, the burner will only attempt to reignite if the system temp drops below the ON temp –...
  • Page 107 TFTN 085-199 Installation and Operation Manual Display is Blank: i. Confirm that the service switch located at the bottom of the control panel (see Figure 18-4) is in the on position. ii. Confirm that 120VAC is applied to terminals LINE and NEUTRAL; see section 12.0 –...
  • Page 108 Installation and Operation Manual TFTN 085-199 Error Codes There are various types of errors, some are blocking (i.e., Manual & Auto Reset type) and required intervention to restore boiler operation, while others are informational (i.e., Warnings) and do not directly block boiler operation. Error Types: •...
  • Page 109 TFTN 085-199 Installation and Operation Manual Error Error Code Problem Possible Remedy Type Faulty sensor – check for proper readings from the boiler Outlet and Inlet temp sensors (see Table 18-2). Water pressure to high – reduce water pressure. Confirm correct functioning/installation of the pressure regulator and expansion tank.
  • Page 110 Installation and Operation Manual TFTN 085-199 Error Error Code Problem Possible Remedy Type Faulty wiring – check the wiring to the System sensor for water or corrosion 150 – Common flow System sensor reading > Auto sensor overheat 210°F reset Faulty sensor –...
  • Page 111 TFTN 085-199 Installation and Operation Manual Error Error Code Problem Possible Remedy Type 1.Test for proper voltage and grounding. 301 – Display error Power problem / 2.Switch the boiler OFF and ON at the main electrical Auto Eeprom defective PCB power supply.
  • Page 112 Installation and Operation Manual TFTN 085-199 Error Error Code Problem Possible Remedy Type BUS wiring damaged – Inspect BUS wiring for bad 412 – Room sensor Room sensor circuit connections Auto circuit open or short open or short circuit Reset Damaged PCB –...
  • Page 113 TFTN 085-199 Installation and Operation Manual Error Error Code Problem Possible Remedy Type Improper combustion settings – test combustion at Max and Min Power as per section 9.0 – Gas Valve and Burner Setup Restricted air-intake or exhaust – check for restrictions Dirty combustion chamber or burner –...
  • Page 114 Installation and Operation Manual TFTN 085-199 Error Error Code Problem Possible Remedy Type Faulty wiring – check the wiring to the Flue sensor for Auto water or corrosion Reset 605 – Flue sensor open Flue sensor reading is circuit invalid Faulty sensor –...
  • Page 115 TFTN 085-199 Installation and Operation Manual...
  • Page 116 Installation and Operation Manual TFTN 085-199 Visit us online NTI Boilers Inc. 30 Stonegate Dr. Saint John, NB E2H 0A4 Canada Technical Assistance: 1-800-688-2575 Website: www.ntiboilers.com Fax: 1-506-432-1135...

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