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NTI Trinity Ti 100 - User Manual

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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.

Questions and Answers

  • C
    Chase DillonSep 7, 2025
    What does Three Flashes on Fenwal mean for NTI Boiler?
    • C
      Cathy KhanSep 7, 2025
      If the Fenwal displays three flashes on your NTI Boiler, it indicates that if the condensate drain gets blocked, the boiler will become flooded and terminate operation, as the flame rod becomes immersed. This will damage the flame probe. To correct this, clear the drain blockage and prevent it from happening again. Remove and dry the probe. Reinstall the probe and try for ignition. If it fails, leave the fan running for up to three hours to dry out the insulation and probe.
  • W
    William BarrettSep 9, 2025
    What does Two Flashes on Fenwal mean for NTI Trinity Ti 100 Boiler?
    • F
      foliverSep 9, 2025
      If the Fenwal displays two flashes on your NTI Boiler, and the combustion sequence is normal with no flame before ignition, the Fenwal control is defective and must be replaced.
  • N
    Nicholas TapiaSep 12, 2025
    Why does my NTI Boiler show ER6?
    • T
      terrellrandallSep 13, 2025
      The ER6 error on your NTI Boiler indicates that the Sentry control has detected a lack of 24V to the gas valve during operation or a Fenwal ignition lockout. This indicates a problem in the ignition sequence, which may stem from a faulty igniter, flame sensor, or gas valve, or from improper line pressure or combustion. Check the ignition sequence to identify the malfunctioning component. Note that the Sentry control will retry the ignition sequence one hour after the ER6 code first appears, or if the control is reset.
  • E
    Edward PriceSep 14, 2025
    How to fix ER1 on display on NTI Trinity Ti 100 Boiler?
    • A
      Adam RobertsonSep 14, 2025
      The ER1 error code on your NTI Boiler means the Sentry has detected a water temperature exceeding 250ºF at the Water Sensor. If the boiler is extremely hot, check for adequate water pressure and circulation, then contact NTI for assistance. If the boiler is not hot, inspect the Water Sensor electrical connections for grounding or shorting, and check the wiring from the Sensor to the Sentry Control. If the resistance of the Water Sensor is not within the correct range, replace it. (Refer to the resistance charts for 1 Mohm Trinity Thermister).
  • B
    bbarnesSep 18, 2025
    Why does my NTI Trinity Ti 100 show ER3 on display?
    • R
      Ryan DavisSep 18, 2025
      The ER3 error code on your NTI Boiler indicates that the Sentry has detected an open circuit in the Water Sensor circuit. Check the wiring to the Water Sensor for open circuits or shorting to ground. Note that ER3 will be displayed if the temperature sensed is less than 0°F. If the wiring is intact, replace the Water Sensor if its resistance is not within the correct range. Refer to the resistance charts for the 1 Mohm Trinity Thermister.

NTI Trinity Ti 100 Specifications

General IconGeneral
BrandNTI
ModelTrinity Ti 100
CategoryBoiler
LanguageEnglish

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