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If you are swapping a DB, the best advice is to carry out an EICR prior to the replacement. If there are any C2 or C1 codes they should be addressed of course.

lectrician, have a read of items 1.2, 3.1 and 3.2 of BPG1. Think why you are replacing the board. in your example you are replacing it in order to increase the quantity of available circuit ways. Your are intending to reconnect existing circuits plus add others. If the additional circuits are...

Indeed John, I was just expanding the point for the OP

It's down to the extent of the work being covered by the EIC. What would you describe the work being done as covering? If for example you are replacing a DB you are not required to tick boxes relating to the routing of cables in correct zones, it would be NA. You have installed a new DB and...

Thanks Hotfly. Yes I did think about switching the back-up immersion heater on to try that out - if that worked that would confirm the blender was ok I presume. Anyway, an update. The client rang this morning to say everything was now fine. So this is with a surface mounted clamp on cylinder...

Oh,by the way, would the two bathroom rads be a bypass for when the water gets to temperature? I'm not good enough on the plumbing side to know how they would come on with the hot water. They wouldn't be supplied via the blender would they? I bet that a really stupid question, but hey ho!

OK, I can see the blending valve. Picasso I'm not sure how to check the hot water coming out of the cylinder; how would you do that? Oilhead, obviously I cannot see how the pipes are run, but once the cylinder stat is satisfied, the 3-port valve gets a supply via the Number 2 terminal on the...

The boiler stat is set at max, no numbers, its not been changed. I'm starting to think the replacement cylinder stat that went in the cylinder pocket is not calibrated properly. I have, as I said, fitted a temporary clamped on standard type cylinder stat on and its now set at 65 degrees (I...

The poster said they had checked the output voltage from the time clock and it was 0v. So it will be the timer Plus it is LAP, so it did well to last 2 days!

Sorry, Im a new poster, but I have posted two pictures that might help. No sure if this shows any blender? I can see something that looks like a mini expansion vessel (silver thing level with the motorised valve) and the brass fitting that is shown on the 1st pic that has three connections, but...

I'll get a pic in a while and post it later on.

Ah well, I did say I wasn't an expert on thermal store. The Plumber told me it was but he's just gone on holiday so I cant quiz him. So, its just domestic HW, and radiators. the heat source is the gas boiler. The valve is just a diverter, the normal position is AB to B open (To cylinder) and...

Hi I was asked to look at the electrical installation of a heating system that packed up. No hot water or heating. The system is comprised of a gas boiler, a thermal store cylinder (I hadn't seen this set up before), a pump, a 2 channel programmer, a room thermostat, a cylinder thermostat and...