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NTI Trinity Ti 150 - User Manual

NTI Trinity Ti 150
38 pages
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1.0 SPECIFICATIONS..................................................................................................2
1.1 HIGH ALTITUDE OPERATION..................................................................................2
2.0 INSTALLATION REQUIREMENTS ...................................................................2
3.0 VENTING .................................................................................................................4
3.1 VENT PIPE MATERIAL ............................................................................................4
3.3 VENTING RULES AND GUIDELINES .........................................................................7
3.4 VENTING CLEARANCES ..........................................................................................7
4.0 CONDENSATE DRAIN..........................................................................................9
5.0 INSTALLING GAS PIPING...................................................................................9
5.0 INSTALLING GAS PIPING.................................................................................10
5.1 INSTALLATION......................................................................................................10
5.2 TESTING AND SETTINGS ........................................................................................10
6.0 HEATING SYSTEM PIPING...............................................................................12
6.1 PRIMARY LOOP PLUMBING...................................................................................13
6.2 SECONDARY LOOP HEATING SYSTEM ..................................................................16
6.2.1 Multiple Zones using Zone Valves.............................................................16
6.2.2 Multiple Zones using Pumps......................................................................16
6.2.3 Multiple Zones with Different Temperatures............................................17
6.3 DOMESTIC COMBI SYSTEM...................................................................................18
7.0 WIRING..................................................................................................................20
7.1 SIMPLIFIED WIRING CONNECTIONS......................................................................21
7.2 ADVANCED WIRING SYSTEMS..............................................................................22
7.2.1 Multiple 4 wire Zone Valves.......................................................................22
7.2.2 Multiple Zones with Taco Valve controller................................................23
7.2.3 Multiple Zones Pump controller................................................................24
7.2.4 Multiple Temperature Zones with Injection Pumps..................................25
8.0 SENTRY 2100 CONTROLLER ...........................................................................26
9.0 LIGHTING BOILER.............................................................................................30
9.1 INITIAL START-UP.................................................................................................30
9.2 RE-LIGHTING UNIT...............................................................................................30
9.3 TURN OFF BOILER.................................................................................................30
10.0 TROUBLE SHOOTING......................................................................................31
11.0 SEQUENCE OF OPERATION ..........................................................................34
14.0 ANNUAL MAINTENANCE AND INSPECTION............................................36
14.1 COMBUSTION CHAMBER CLEANING...................................................................36
15.0 PARTS LIST.........................................................................................................37
CAUTION:
IT IS THE RESPONSIBILITY OF THE HOMEOWNER TO
KEEP THE VENT TERMINAL CLEAR OF SNOW AND ICE.
Trinity Ti Boiler Only
VERSION DATE: 1-5-2010
Installation and
Operation Instructions
Trinit
y
Ti
This Boiler must be installed by a licensed and trained Heating
Technician; otherwise the warranty of this unit is void. Failure
to properly install this unit could cause damage to property
and injury to occupants possibly resulting in death.

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Questions and Answers

  • L
    Larry HarveyAug 20, 2025
    How to solve burner shutting off too soon on my NTI Trinity Ti 150 Boiler?
    • K
      kellyprestonAug 21, 2025
      If the burner on your NTI Boiler shuts off before reaching the set-point temperature and the burner light goes out, it is due to the reset calculation being used to lower the HI setting. If an OD probe is in use, the HI setting is calculated using the formula in Section 8. Adjust the RES setting as necessary.
  • J
    Joseph IbarraAug 22, 2025
    What to do if my NTI Trinity Ti 150 Boiler bangs or hisses?
    • B
      Brandon CarrollAug 22, 2025
      If your NTI Boiler bangs or sounds like a kettle while the burner is running, it indicates insufficient flow. Ensure the plumbing matches the manual's diagrams. Check for faulty pumps or stuck end switches. This issue can lead to the boiler overheating.
  • M
    Michael GentryAug 25, 2025
    What to do if NTI Trinity Ti 150 will not stay lit?
    • J
      Jose SmithAug 25, 2025
      If your NTI Boiler won't stay lit, it indicates a lack of a flame signal. If the burner light on the Sentry is going out, check the condensate drain for blockages and the inlet piping for ingested snow or water. If the flame rod gets wet, it may need replacement. Check for resistance from the flame rod to the ground (it must be an open circuit). Verify proper polarity of line and neutral wiring to the boiler.
  • K
    Kathy MartinAug 26, 2025
    What does ER6 mean on NTI Trinity Ti 150 Boiler?
    • J
      Joe WhiteAug 26, 2025
      If the ER6 error code appears on your NTI Boiler, it indicates a problem in the ignition sequence, possibly due to a faulty igniter, flame sensor, gas valve, or improper line pressure or combustion. Check the ignition sequence to identify the malfunctioning component. Also, check for 24V between terminal B on the terminal block and F1 on the Sentry plug. If not present, a limit has tripped.
  • A
    Alyssa AguilarAug 27, 2025
    What to do if ER5 On Display DHW Problem appears on NTI Boiler?
    • T
      tara14Aug 28, 2025
      If you see 'ER5 On Display DHW Problem' on your NTI Boiler, it could mean there isn't enough flow to prevent the boiler from tripping on the limit. Verify a minimum of 6 GPM flow through the boiler and indirect circuit. You can also reduce the indirect Aquastat setting or increase the difference between the Lo Setting and the indirect Aquastat setting. Another possibility is an indirect limit or wiring failure.
  • G
    Gregory BrownAug 29, 2025
    What to do if Sentry Controller Locks-up in NTI Trinity Ti 150 Boiler?
    • W
      williamwilliamsAug 29, 2025
      If the Sentry Controller in your NTI Boiler locks up, it may be due to excessive noise, current, or voltage spikes in the 120V power supply. Check the voltage at the wires going to the A-C-T terminals of the boiler. Check the magnitude of the line voltage power supply. Check the Amp draw of output C1 and Ap (max 3 Amp), and the Amp draw of the control on start-up (max 6 Amps).
  • W
    wleeAug 31, 2025
    What does ER1 mean on NTI Trinity Ti 150 Boiler?
    • J
      Jared CastilloAug 31, 2025
      If 'ER1' is displayed on your NTI Boiler, check if water is dripping on the sensor. You may need to reduce the Hi setting and ensure proper water circulation within the system.
  • J
    johnsonkendraSep 2, 2025
    Why does NTI Trinity Ti 150 Boiler display goes blank?
    • C
      Carolyn PayneSep 2, 2025
      If the display on your NTI Boiler goes blank, check for 120V between terminals L1 and L2 at the Sentry. If 120V is present, turn the power off, remove the line voltage harness from the Sentry, and check for resistance between L1 and L2 of the control; if the circuit is open (O.L), the internal fuse has blown. Check for shorts in wires leading to circulators before replacing the controller. If 120V is not present, check the wiring and for 120V at the source.
  • N
    nfergusonSep 4, 2025
    What does ER3 mean on NTI Boiler?
    • O
      Olivia BergSep 4, 2025
      If 'ER3' is displayed on your NTI Boiler, check the wiring. Note that ER3 will appear if the sensed temperature is less than 32°F. If resetting the power corrects the problem, the Sentry control had locked up.
  • J
    Jennifer NixonSep 6, 2025
    What does ER2 mean on NTI Trinity Ti 150 Boiler?
    • B
      burkekennethSep 6, 2025
      If 'ER2' is displayed on your NTI Boiler, check the wiring.

Summary

1.0 SPECIFICATIONS

1.1 High Altitude Operation

Details how boiler performance is affected by altitude, with de-rating guidelines.

2.0 INSTALLATION REQUIREMENTS

2.1 Location

3.0 VENTING

3.1 Vent Pipe Material

Specifies approved materials for exhaust and air supply piping.

3.2 Venting Configurations

3.2.1 Two-Pipe Vent Termination

Illustrates two-pipe vent termination with specific clearances and methods.

3.2.2 Concentric Vent Termination

Details concentric vent termination, noting it's not approved for Canada.

3.2.3 Ti400 Optional Vent Termination Kit

3.2.4 Roof Venting

3.3 Venting Rules and Guidelines

3.4 Venting Clearances

3.5 Determining Vent Lengths

3.6 Outdoor Horizontal Venting

4.0 CONDENSATE DRAIN

5.0 INSTALLING GAS PIPING

5.1 Installation

Details gas piping installation steps and references applicable codes.

5.2 Testing and settings

Details line pressure requirements and combustion testing procedures.

Setting Combustion

6.0 HEATING SYSTEM PIPING

6.1 Primary Loop Plumbing

Low Water Cutoff; Flow Switch

Primary Loop For Heating Model

Primary Loop For Combi Model Only

6.2 Secondary Loop Heating System

6.2.1 Multiple Zones using Zone Valves

Illustrates piping for multiple zones controlled by zone valves.

6.2.2 Multiple Zones using Pumps

Illustrates piping for multiple zones controlled by individual pumps.

6.2.3 Multiple Zones with Different Temperatures

6.3 Domestic Combi System

Domestic Hot Water Features

Anti-Scald Valve

Details the installation and setting of the anti-scald valve.

Hard Water

Addresses the impact of hard water and necessary precautions.

Cleaning

Provides instructions for cleaning heat exchangers.

Combi Limitations

Outlines limitations of the Combi system for domestic hot water.

Procedure for Setting up Domestic Hot Water

Step-by-step guide for setting up domestic hot water flow and temperature.

7.0 WIRING

7.1 Simplified Wiring Connections

7.2 Advanced Wiring Systems

7.2.1 Multiple 4 wire Zone Valves

Wiring diagram for a multi-zone system using 4-wire zone valves.

7.2.2 Multiple Zones with Taco Valve controller

7.2.3 Multiple Zones Pump controller

7.2.4 Multiple Temperature Zones with Injection Pumps

8.0 SENTRY 2100 CONTROLLER

8.1 Sentry 2100 Display

Explains the meaning of lights and indicators on the Sentry 2100 controller.

8.2 Sentry 2100 Operation

8.3 Setting the Sentry 2100

8.3.1 Sentry 2100 Menu

8.3.2 Calculating Outdoor Reset Curve (RES)

8.4 Outdoor Sensor (10 K)

9.0 LIGHTING BOILER

9.1 Initial Start-up

Step-by-step guide for the initial powering and startup of the boiler.

9.2 Re-lighting Unit

Instructions for safely re-lighting the boiler if it goes out.

10.0 TROUBLE SHOOTING

ER1 On Display

Error code ER1: 'Water Temperature Excessive', with solutions.

ER2 On Display

Error code ER2: 'Water Sensor Short Circuit', with solutions.

ER3 On Display

Error code ER3: 'Water Sensor Open Circuit', with solutions.

ER4 On Display

Error code ER4: '24V Limit Error', with solutions.

ER5 On Display

Error code ER5: 'DHW Time-Out', with solutions.

ER6

Error code ER6: 'Flame Lock Out', with solutions.

ASO Indicates that the Air Switch is Open

ASC Indicates that the Air Switch is Closed

Two Flashes on Fenwal

Three Flashes on Fenwal

Boiler will not stay lit

Boiler bangs or hisses

Boiler Lights rough or pulsates

Fan appears to be creating a noise in the house

Thermistor Curves

11.0 SEQUENCE OF OPERATION

12.0 WIRING SCHEMATIC

13.0 INSTALLATION CHECKLIST

Start-up

Steps to follow for the initial startup and testing of the boiler.

Operational Checklist

Checks to perform to ensure proper operational parameters after startup.

Before Leaving

Final checks and homeowner information before leaving the installation site.

14.0 ANNUAL MAINTENANCE AND INSPECTION

14.1 COMBUSTION CHAMBER CLEANING

Procedure for inspecting and cleaning the combustion chamber.

15.0 PARTS LIST

Model Ti400

NTI Trinity Ti 150 Specifications

General IconGeneral
Fuel TypeNatural Gas or Propane
Boiler TypeCondensing
Maximum Input (BTU/hr)150, 000
AFUE95%
Efficiency95% AFUE
Operating Pressure30 psi
Gas Connection Size3/4 inch
Electrical Requirements120V AC, 60Hz

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