NTI Boiler: Heating-only use on TRX150 / TRX199: disconnect the 3-way valve motor
Heating-only use on TRX150 / TRX199: disconnect the 3-way valve motor on a NTI boiler: If the boiler is not connected to an indirect water heater, the fitting must be capped and the valve motor disconnected. Otherwise freeze protection may not work.
Applies to: TRX150 / TRX199 heating-only installations
How to fix heating-only use on trx150 / trx199: disconnect the 3-way valve motor: step by step
- Cap the DHW fitting as shown in the piping figure. A cap is supplied with the boiler.
- Disconnect the electrical connection of the 3-way valve motor while the boiler runs in central heating mode.
- This locks the valve in central heating mode so freeze protection works.
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. 32. 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.