These are probably combination storage heaters, make sure both switches are on. they take a day or so to warm up, so be patient.
The input control sets how much heat to store, i'll have to look up what the boost does LOL
the rocker switch gives you instant heat from the convector part, you usually use that bit if there's not enough heat left in the bricks at the end of the day.
in theory you should be able to go here:
http://www.dealec.co....ctor_Heaters_149.html
and get some info on them.... maybe if i bully the website guys enough they'll put an instruction manual up too ;)