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General| Brand | NTI |
|---|---|
| Model | Trinity TX51 |
| Category | Boiler |
| Fuel Type | Natural Gas or Propane |
| Efficiency | 95% AFUE |
| Modulation | 5:1 |
| Input BTU | 51, 000 BTU/hr |
| Warranty | 12-year limited warranty |
Boiler installation must conform to manual, local authority, and codes.
Owner must ensure annual service by qualified technician.
Technician must ensure installation complies with manual and codes.
Boiler capacity must be de-rated for elevations above 2000 ft.
Requirements for ventilation openings if clearances are not met.
Ventilation requirements for closet installations.
Clearances and ventilation for alcove installations.
Specific mounting and protection requirements for garage installations.
Refers to Figure 3-2 for wall mounting instructions.
Combustion air-inlet piped directly outdoors per codes.
Combustion air drawn from indoors via appliance area per codes.
Methods for determining opening size/location for indoor combustion air.
Methods for providing outdoor combustion air via openings.
Refers to Figures 5-1 and 5-2 for termination clearance details.
Steps for installing the factory supplied condensate trap.
Guidance on gas piping requirements and sizing per codes.
Essential safety precautions before operating the boiler.
Step-by-step procedure for lighting and operating the boiler.
Steps to safely shut off the gas supply to the boiler.
Procedure for measuring and verifying gas line pressure.
How to adjust the throttle/input screw for gas flow.
Procedure for calibrating burner operation using a combustion analyzer.
Mandatory step for propane conversions to ensure safe operation.
Steps to prepare the system and water chemistry requirements.
Details on PRV, gauge, LWCO, and plumbing configurations.
Circulators, air removal, expansion tanks, and piping configurations.
How the Combi model heats domestic hot water on demand.
Flow rate limits, cold start, preheat mode, and setup procedures.
Installation of a DHW storage tank for improved hot water delivery.
General guidance on making wiring connections and using grommets.
Power supply requirements and electrical safety precautions.
Wiring, managing boiler designation, addresses, rotation, and emergency setpoints.
System sensor, pumps, thermostat, and tank sensor connections for cascade.
Detailed wiring diagram for the Tx boiler.
Ladder-logic diagram illustrating boiler control functions.
Checklist for completing the boiler installation steps.
Steps for initial boiler start-up.
Checks to perform after installation for proper operation.
Final checks before leaving the installation site.
Items to inspect at the beginning of each heating season.
Steps for cleaning the boiler's combustion chamber.
Boiler start-up sequence and main display screen overview.
Accessing and viewing boiler operating conditions via the user menu.
Accessing and adjusting boiler parameters via the installer menu.
Navigating and understanding lockout, error, and low water pressure indicators.
Essential safety rules to follow when servicing the boiler.
Steps to identify and resolve problems causing the boiler to not operate.
Guidance on interpreting and resolving error codes and operational issues.
Illustrated parts breakdown for heat engine and gas train components.
Illustrated parts breakdown for cabinet, vent, and air-inlet components.
Illustrated parts for controls, installation kits, and accessories.
