NTI Boiler: Key installation checks before start-up
Key installation checks before start-up on a NTI boiler: Items from the installation checklist that a technician should verify before firing the boiler.
Applies to: TRX150 and related TRX models
How to fix key installation checks before start-up: step by step
- Gas supply line at least 3/4 in diameter.
- Gas line pressure during max and min input stays between 3.5 and 14 in WC for natural gas, or 8 and 13 in WC for propane.
- CH relief valve rated 30 psi with at least 3/4 in discharge line to an open drain.
- DHW relief valve rated 150 psi with at least 3/4 in discharge line to an open drain.
- Vent pitched back to the boiler at 1/4 in per foot.
- Vent terminations at least one foot above exterior grade and one foot above maximum snow level.
- Supply voltage matches the rating plate (120V AC).
- Burner flame checked and combustion verified with a calibrated analyzer.
Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.
If the unit shows an error code, look it up: NTI Boiler codes
Models
TRX085TRX110CTRX150TRX199TRX199C
More commissioning tips for boiler
Source: NTI TRX150 manual, p. 81-82, 88. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.