i have just purchased a digital thermastat byc08he i want to connect this in place of a sunvic tlm there is brown black and grey now i know i will not use the grey because this is for thermal strip in the sunvic ac is connected into the unit to power the l e d unit, then there is the output load but the output load would be connected to the mains brown 240volt is this still ok to connect. because this is live anyway so in a way there is onley two connections to make brown and black , which if you connected them together would switch the boiler on many thanks for any reply
Hi del789 I'm a little concerned here, The Sunvic TLM is a high current rated thermostat, so what is it controlling ? and which TLM model is it ? I have no information on the digital model - c08he who are they, and what is it's rating ?
thanks for reply it,s switching my central heating boiler ( the byco8 looks like same diagram and will switch 16 amp and the thermastat thats already in is a sunvic tlm 2628 13 to amp as i said the brown wire on the TLM has 240volt coming from it anyway would it still be ok to connect this to the load on the digital thermastat output
You will need to identify which wire is permanent Live (phase), permanent Neutral and Switched Live to the boiler. Use the diagram in the above link to help you identify which wires are which. The Sunvic room thermostat has an anticipator hence the requirement for a neutral too.
The wiring to the BYC08 will depend on which model you have H1 or H3.