Am looking to install a nest thermostat set up but am stuck on identifying the correct wiring diagram for my current set up which consists of he following:
Gloworm Flexicom boiler
Switchmaster 400 controller (old dial type thing)
a single room thermostat
2 port valve
All the info I see whether an S plan or a Y plan system details an immersion tank plus pump, neither of which I have. Assume the combi boiler does the pumping as well as the heatng.
Thanks