I received a query from a reader today asking how to bleed air from a Firebird popular oil boiler. This stems from a previous article on servicing oil boilers, see here. I thought I might as well share the answer with you as it quite difficult to locate the correct nut to loosen if you are unfamiliar with the boiler. It certainly took me a while to find the right location when I accidently ran out of oil a few years ago. See photograph below for a guide.
The photograph shows a side view of the boiler burner and pump unit. The bleed nut is shown clearly and, using an allen key, it is easy to loosen it to allow the trapped air to escape. When all the air has escaped some fuel will start to leak out, once this happens, re-tighten the nut. Press the red restart button and the boiler should restart, you might have to press it a few times.
Please note however it is easy to loosen one the wrong nut by accident, these are shown in the picture also. These nuts will bleed the system but will also cause problems with the flue/air mixture settings (upper nut) or allow too much flue to escape (lower pressure gauge nut).