I'm about to fit a thermostat to my Worcester Bosch 24i combi boiler. The installation manual shows the thermostat connected with 3 wires a neutral and the 2 others for a switching a live connection. My understanding is that the neutral is for supply to a resistor to generate heat in a thermostat that uses a bi-metalic strip to make it more sensitive.
The stat I am looking at is a Maplin digital thermostat which has connections for COMMON, NO (Normally Open) and NC (Normally Closed). Is the neutral wire not required with this stat and I just wire it between common and normally open?
Do digital stats not need the internal resistor?
Advice appreciated.
Marc