How often does a Heat Interface Unit (HIU) need servicing?
Just like a boiler or air source heat pump, a heat interface unit (or HIU) needs regular servicing to operate effectively.
HIUs have an annual maintenance requirement to ensure safe working and optimum performance. This is especially important for when the HIU is being used in hard water areas or where the water supply contains particulate matter.
What happens during a HIU service?
A typical service for a heat interface unit includes:
Cleaning vital components
Cleaning of the district heating flow strainer filter mesh and the cold-water inlet filter will help to prevent possible operational faults.
Inspecting and testing safety features
It is essential that the safety relief valve(s) are periodically inspected and manually opened to ensure there are no blockages in the valves or discharge pipework. The sensors within the HIU will also be tested as will all safety valves, so that any potential issues can be identified and addressed.
Checking for leaks
Similar to inspecting safety valves and other features, a service includes checking for leaks throughout the HIU system.
Why a service for a HIU is important
Regular servicing maintains the efficiency of the unit by preventing breakdowns and ensuring that key parts remain in optimum condition. A service is also a requirement for maintaining safety and compliance with specific regulations.
From an operational point of view, having a service for a heat interface unit ensures that it continues to work safely and continue providing consistent performance for the building’s residents.
A preventative approach when it comes to the maintenance of the unit also helps maximise its lifespan and reduce the likelihood of an unexpected issue or breakdown.
Take a look at Baxi's AquaHeat HIU
For homes fed with heat from a heat network, the Baxi AquaHeat is the answer to your apartment’s heating and hot water requirements. Perfectly suited to supply heat to communal and commercial premises in your development.