Is this horizontal Tank Installation correct?

[baldbob]

Hi all,

We've had a horizontal tank installed (see photos below), it has a temperature and pressure release valve which keeps popping. Previously it was a plastic pipe which melted last time and flooded the loft (nightmare) so we asked the plumber to use copper. It has now popped several times since we've had it despite the thermostats not being set to maximum and it seems very intermittent (sometimes a week or between issues yet the tank water is used every day). If we run solely on either heater it seems ok but on both, we have the problem.

Any help would be appreciated as we're at the end of our tether and its costing us a fortune in electricity. Unfortunately the installer isn't available at the moment.

Is the "hot out" suppossed to be exactly at the top, making the heaters and the stats horizontal rather than pointing upwards from the bottom? Currently its about a 40 degree angle away from the top).

Any other suggestions would be appreciated!

 

[baldbob]

Quick update, we just had another instance of it overflowing, just a steading trickle of boiling hot water coming out of the overflow. While this was happening, both of the heaters were on and drawing power. Tried the hot water tap, the water is scalding hot. I'm assuming this means either both thermostats are faulty or there's an issue with the installation (like the tank rotation)?

 

[Johntheo5]

Can you show exactly where the expansion vessel (Lower right??) is piped from, also the writing on the labels on all the devices on the cylinder eg. pressure reducing valve, expansion relief valve, and the temperature and relief valve (T&PRV) on the cylinder itself. Also, the vol (capacity of the expansion vessel)

 

[baldbob]

Can you show exactly where the expansion vessel (Lower right??) is piped from, also the writing on the labels on all the devices on the cylinder eg. pressure reducing valve, expansion relief valve, and the temperature and relief valve (T&PRV) on the cylinder itself. Also, the vol (capacity of the expansion vessel)

Thanks for the reply. I've added the label of the pressure tank and already have the main tank. I'll nip in to the loft and get some more photos of the relief valves shortly.

 

[Johntheo5]

Thanks, also take a photo of the details on the UVC itself under "Product Data"