2. How to reset pressure on my Heat Interface Unit

How to reset pressure on my Heat Interface Unit (HIU)? 

The Baxi AquaHeat HIUs have an analogue pressure gauge visible on the front of the unit, the optimum system pressure is highlighted with a green triangle on the gauge. If the system pressure has dropped below the optimum amount, the pressure can be topped up using the Baxi EasyFill (where the Baxi first fix rail has been installed). 


The EasyFill can be located on the top of the unit. The below video shows the top-up procedure for one of our Baxi gas boilers with which we utilise the same filling lever.

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VWART stands for Volume Weighted Average Return Temperature. Read more about it in our Baxi FAQ section...

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In what lead time are the Baxi AquaHeat range products available?

Baxi AquaHeat range & associated accessories & controls are available on an 8-week lead time. Baxi can also manage a phased delivery depending on project.

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What type of control system is used on the Baxi AquaHeat range?

Baxi AquaHeat HIUs contain a full electronic control system, using our in-house designed TR-04 controller. Some Key Functions can be found here...

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Are the Baxi AquaHeat HIUs compatible with our range of boilers, water heaters and cylinders?

Our HIUs are designed to be compatible with our range of commercial heating products and solutions. Learn more.

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