To anyone interested.
The oil feed on the heater is controlled via two inline valves, one is activated by the infra red sensor, and shuts off immediately if there is a flame out. This one will also close with loss of power, ie, fail safe. The second valve is controlled by a thermostat, keeping the temperatures sane. The theromocouple is mounted at the hottest point, this being in the red area at the base, as seen in the first test photo. It simply switches the oil on and off, the latent heat of the internal fire brick allows a hot start The fan pressurises the outer casing and the air exits into the room at a pressure slightly above atmospheric, preventing any smell and fumes. Once running, the burner has proven over 5 years to be reliable and safe. A second water feed is controlled by a valve that can be manually switched, this increases the efficiency and reduces fuel consumption.... depending on the fuel used The outer shell is designed to hold 20 liters of oil in containment just in case of a fault.... the main oil supply is limited to 20 liters for this reason, The burner is started with meths, and will self run from cold with little to no intervention. Having a thermostaic fan ensures the inner casing is always hot enough to ensure a clean burn. Oil burners are available commercially, and are fairly common in NZ but very expensive to buy.
