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Frequently Asked Questions

Here are some answers to questions we are often asked. For more detailed information the team at UNEX will be happy to help.


How should the heat exchanger be connected?

The heat exchanger should be connected in cross-flow, this ensures that optimal performance can be achieved. Further information can be found in the relevant manual.

In which position should the heat exchanger be fitted?

The heat exchanger is best fitted vertically, this helps reduce air and dirt being trapped. Further information can be found in the relevant manual.

Which sealing materials should I use?

This depends on the medium in the heat exchanger. For advice please contact UNEX technical support.

Does the air need to be specially bled from the heat exchanger?

In most systems the air in the heat exchanger will be bled together with the other air in the system.

Is the guarantee still valid once the heat exchanger has been built into a system?

The guarantee is valid, as long as the heat exchanger has been fitted, used and services according to the relevant fitting, operations and service manual.

How can I clean my heat exchanger?

Your heat exchanger can be cleaned using a special cleaning material, available from UNEX. We can also clean heat exchangers for you in our workshops.

Can I weld anything to my heat exchanger?

Welding and other similar processes create very high temperatures, which can damage seals and structure within the heat exchanger. Any work undertaken would invalidate the garauntee.

Do I need to fit a mounting bracket, or will the connections support the heat exchanger?

It is recommended to use mounting brackets. Additional strain on the connections can lead to premature failure and will invalidate the guarantee.

Does the heat exchanger really need insulation?

Depending on the operating temperature, insulation prevents heat loss from the heat exchanger and prevents the risk of injury through burns.

What is a cold leak?

Cold leaks can be caused by thermal relaxation in a sealed plate heat exchanger. As a result, the sealing properties of certain elastomers are temporarily reduced. Cold leaks occur mainly in older heat exchangers where the seals have already lost their elasticity.


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