T-Smart Tesla Hot Water Cylinder Thermostat - Upgrade Your Cylinder to a Genuine Smart Appliance TIHTS

has to be fitted horizontaly

please ensure this will work for you as we will not accept returns on this item

The immersion heater must be fitted horizontally. Heaters mounted horizontally are typically less than 450mm but should be at least 75mm shorter than the horizontal width of the tank into which it is fitted. 3. The immersion heater should only be installed in a system where the heating element is always below the water level such as in a cistern fed tank. 4. Install the heater into the tank using the gasket or “O” ring seal as supplied, tighten with a good fitting spanner to prevent any damage to the heater. Then fill the system with water according to your standard procedure to ensure that all air pockets are removed and check for leaks around the joint. 5. Remove the cap from the existing immersion heater. Keep the nut as you will need this later on. 6. Disconnect the Live and Neutral wires from the existing Immersion, and remove the Thermostat.

please see link below

https://irp-cdn.multiscreensite.com/3e637f2b/files/uploaded/Installation%20Guide_TELT7DTTPWzLZdnMl0n1.pdf