NTI Boiler: Functional test after maintenance
Functional test after maintenance on a NTI boiler: Last job before handing the TRX150 back. Fill, purge, power up, check.
Applies to: TRX150
Common causes of functional test after maintenance
- Air left in the CH or DHW circuits
- System pressure below the fill target
- Exhaust pipe loose, or a gas joint missed after service
How to fix functional test after maintenance: step by step
- Fill and purge the CH circuit to 12 psi and fill and purge the DHW circuit.
- Power the boiler on.
- Purge air again from the CH and DHW circuits if needed.
- Check boiler and system settings and components, and confirm all adjustments work.
- Confirm the exhaust pipe is connected properly.
- Reinstall the boiler front cover.
- Check for gas leaks.
- Set the maintenance interval if needed.
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
Source: NTI TRX150 manual, p. 100. 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.