thermostat wiring?

Hi, I got a replacement stat from ukwhitegoods but it has only two terminals instead of three (not inc earth) they say couple the live and lamp wires together without telling me which is which. the terminals are labelled C and L. I assume L is LIVE but the brown wire goes to the C connector. The H terminal is the missing one which im guessing is the light. Any ideas? otherwise where can I get a wiring diag for an AMICA AK233?
THanks
thanks