Wiring thermostat to extrator fan

[sbadger]

Hi,

I've got a cupboard with an extractor fan, it helps extract heat from electrical equipment (amp/dvd etc).

Tthe fan takes mains 240v has an isolator switch.

I bought a robus rrf10-01 thermostat as it can do nomally open for cooling.

so i'm not sure how to wire the L and N from the isolator via the robus and into the fan.
robus instructions state terminal 2 for live and 4 for neutral when cooling.

so to restate problem, L and N come out of isolator and into fan, how do i wire the stat inbetween?

help greatfully recieved

thanks

stewart