Insulated Load Unit with a controller, actuated 3-way mixing valve (Kvs = 6.3 m3/h), 2 pumps, TSV3B 55°C load valve, ball valves, drain valves, a safety valve, thermometers. The Unit is intended for heating systems with a solid fuel boiler & thermal store, permitting DHW heating. Heating system water is mixed in a 3-way mixing valve with el. actuator, the temperature of return water to a boiler is kept at 55°C min. by a load valve. Boiler heat surplus is stored into a thermal store and used later automatically after the boiler goes out. The integrated Controller controls operation of the whole system, offering selection from several hydraulic variants. The Load Unit is completely internally wired and fitted with a power cable with plug. The system can be controlled by a Room Unit with touchscreen (needs to