NTI Boiler: Check inlet gas pressure at the boiler
Check inlet gas pressure at the boiler on a NTI boiler: Use a manometer on the line pressure test point to confirm the inlet gas pressure is within the minimum and maximum for the gas type. Loosen the bolts before checking the inlet pressure. Do not change screws 2 and 4 (OFFSET and throttle) unless you have a calibrated combustion analyzer.
Applies to: TRX150 natural gas and LP
How to fix check inlet gas pressure at the boiler: step by step
- Turn off the gas supply and confirm the boiler is isolated if the test pressure will exceed 1/2 psi (14 in WC).
- Remove the yellow cap from the line pressure test point.
- Unscrew the P in screw.
- Connect the manometer to the test point.
- Read the inlet gas pressure and compare it to the gas pressure table.
- Disconnect the manometer.
- Tighten the P in screw.
- Leak-check the connection with an approved leak detector solution.
- Replace the yellow cap.
If the unit shows an error code, look it up: NTI Boiler codes
Models
TRX085TRX110CTRX150TRX199TRX199C
Source: NTI TRX150 manual, p. 61. 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.