NTI Boiler: Limit CO when adjusting high fire, low fire or the gas valve
Limit CO when adjusting high fire, low fire or the gas valve on a NTI boiler: CO must be checked with a calibrated combustion analyzer during high and low fire adjustments. CO must not exceed 150 ppm at any time. Small changes to the low fire offset or main flow restrictor can raise CO a lot, so do not touch the gas valve without a working, calibrated analyzer.
Applies to: TRX boilers, start-up and combustion setting
How to fix limit co when adjusting high fire, low fire or the gas valve: step by step
- Connect a calibrated combustion analyzer before any high or low fire adjustment.
- Monitor CO continuously and keep it at or below 150 ppm.
- Make small adjustments to the low fire offset or main flow restrictor only.
- Do not adjust the gas valve without analyzer monitoring.
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. 6. 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.