First of all, regardless of your experience we do recommend that for every installation of an ATC product you follow the installation guide as supplied by the manufacturer before proceeding with the application.  This is a requirement for the warranty to become valid.

Incorrect installation will not only void your warranty but will also reduce your unit’s life and may lead to water damage.

How is that possible?

Frequently when there has been an improper installation the issue relates to Expansion Relief Valve (Safety Valve) as it may be fitted directly on the top of the unit on the cold (blue) side. Once fitted on the top valve blocks expansion.

As water heats up it needs room to expand and an incorrectly positioned valve on top of the unit blocks the space required for this expansion.  As it cannot move the water increases the pressure in the tank making it work constantly on pressure higher than it’s designed for.

Although the units are tested thoroughly and can take high pressure they are not made to constantly work in such an active environment.

Often the first item that may be damaged where a unit has been incorrectly installed will be the safety valve and generally once you get in touch with support who will cover all the angles ideally enabling the customer to resolve the issue.   If this isn’t addressed sufficiently it will put a lot of stress on the tank and over time will cause damage on the tank itself because the seams will break and water will start leaking leaving with you with a much larger and more expensive problem to deal with.

To install a unit correctly first check the manuals, frequently you’ll find a graphic displaying installation procedure. Depending on the size of the unit there should be enough space on the pipe for the water expansion to move, if you’re tight with space you can always get a flexible pipe (must be braided to endure high pressure) and put it into coil. If this can’t be done it is essential that you install the expansion vessel. If the pressure is below 4 bars your unit is installed correctly.  If the safety valve is weeping it might indicate that your pressure is too high and it requires a Pressure Reducing Valve.