NTI Boiler: Auto Boost behaviour
Auto Boost behaviour on a NTI boiler: Auto Boost (4.7.5 = 1) raises the outdoor reset slope by 10 percent every 10 minutes while a call for heat stays on, up to 2 times the nominal slope (4.2.2). When the call is satisfied, the slope drops 1 percent per minute back to the nominal value. Only works when 4.2.1 = 3 or 4.
Applies to: NTI TRX boilers, outdoor reset
If the unit shows an error code, look it up: NTI Boiler codes
Models
TRX085TRX110CTRX150TRX199TRX199C
Source: NTI TRX150 manual, p. 68. 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.