NTI Boiler: Drain the domestic hot water system and indirect tank
Drain the domestic hot water system and indirect tank on a NTI boiler: DHW side and indirect tank on the TRX150. Drain it any time freezing is a risk. Empty means empty, no pockets left to split a pipe.
Applies to: TRX150
Common causes of drain the domestic hot water system and indirect tank
- Vacant or unheated building during cold weather
- Water trapped at low points after shutdown
- Taps left closed, so air cannot get in and water stays in the pipes
How to fix drain the domestic hot water system and indirect tank: step by step
- Shut off the main water inlet valve.
- Open all hot and cold water taps to let air in.
- Drain water from the lowest points of the system.
- Also drain the indirect tank at its drain valve.
- Leave the taps open until the building is heated again.
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
Models
TRX085TRX110CTRX150TRX199TRX199C
Source: NTI TRX150 manual, p. 89. 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.