I'm looking to get my system boiler replaced with a combi and whilst I won't be doing any of the work, I'd like to know a few basic things to understand how my current system is powered.
1. At the minute, there's a cable coming down from the ceiling that goes and up and under the boiler and is connected to something in there. There's another cable that comes from the programmer (directly under the boiler) and goes underneath the boiler, looks like it's connected to the power supply inside the boiler. Under the programmer, there's a fused spur. If I switch this off then the programmer and the boiler goes off. So my question is what is the other cable for that comes down from the ceiling and directly into the boiler? I thought it might be the cable that goes off to the junction box upstairs (where the pump and cylinder are) but isn't that the cable buried in the wall behind the programmer?
2. Should a boiler be on its own circuit? My consumer unit is old but I've looked at a few friends who have RCD consumer units and there isn't a circuit for boiler only. Are they usually on the sockets circuit?
3. Still on the topic of consumer units, when I get mine replaced I presume I can get them to disconnect the immersion heater circuit as I won't need it any more. Again, I've seen this circuit still labeled up in friends consumer units even though they don't have immersion heaters. Or is it worth keeping the circuit for any other purpose?
4. I plan to get the consumer unit changed as well. Is it best to get this done before or after the new boiler system is installed?
1. At the minute, there's a cable coming down from the ceiling that goes and up and under the boiler and is connected to something in there. There's another cable that comes from the programmer (directly under the boiler) and goes underneath the boiler, looks like it's connected to the power supply inside the boiler. Under the programmer, there's a fused spur. If I switch this off then the programmer and the boiler goes off. So my question is what is the other cable for that comes down from the ceiling and directly into the boiler? I thought it might be the cable that goes off to the junction box upstairs (where the pump and cylinder are) but isn't that the cable buried in the wall behind the programmer?
2. Should a boiler be on its own circuit? My consumer unit is old but I've looked at a few friends who have RCD consumer units and there isn't a circuit for boiler only. Are they usually on the sockets circuit?
3. Still on the topic of consumer units, when I get mine replaced I presume I can get them to disconnect the immersion heater circuit as I won't need it any more. Again, I've seen this circuit still labeled up in friends consumer units even though they don't have immersion heaters. Or is it worth keeping the circuit for any other purpose?
4. I plan to get the consumer unit changed as well. Is it best to get this done before or after the new boiler system is installed?
