Recent content by Matt723

Alright, I think there is a consensus that it could be made better. If it's a matter of attaching a piece of plywood to the feet and fixing waterproof sockets on it so they are fixed and off the floor then let's get it done. You are right @EFLImpudence the sockets are not fused but each is on...

Thank you both for your input. Controls is standard vr65 with ebus. Arguably the house does leak a bit but it is terraced with recent extensions so roof should be insulated up to regs from last few years. Front and back facade and kitchen return will be solid 2 bricks though the point is...

Hi All Under kitchen cabinets, for washing machine and dishwasher. Fused 13 amp yes, but does it need to be attached somewhere? Thanks

Not balanced by myself. All rads seem to get equally hot (to the human touch, not tested with a particular device). Should anything be done on this front?

Hi All This is the set-up: 5 beds, victorian, ~1800 sqft, 12 radiators (including 3 towel rads, one in each bathroom / en-suite). Vaillant ecotec 637 plus S-plan. There was weirdly an additional grundfos pump ups2 on top of the internal pump in the boiler. This pump is disconnected so only...

Hi Madrab, actually the DHW valve opens as expected, primary and return flow pipes do heat up and I do get hot water. It's more the way the boiler is operating which I find a little weird.

Hi All Vaillant ecotec 637 plus, S-plan external cylinder, eBus control. When in DHW mode the boiler acts weirdly as in it goes full on for ~5 seconds then minimum output for ~5 seconds and this forever until it stops. It's shooting for 75 degrees and with the behaviour of full on / full...

@stem, you have been most helpful. You are right I should create another thread for the revised question on the whole set-up which I shall do shortly. Yes there is a control bias to this question. I guess the answer is if someone wants to wire an optional element to a vr66 (an external pump for...

Thank for your input, much appreciated! Here is additional info and a photo of the pipe work of this install: - I'm positive there is already an internal pump in the ecotec plus boiler (as you'd expect). It is a Vaillant / Grundfos UPM3 and it's wired on the PCB on the X18 connector. There are...

PCB photo added. As you can see the internal pump is in. It's the external grundfos that has to operate when the valves open that is not plugged. Before ebus and wiring centre there was a 230v brown block with the grey cable which has you see is now disconnected and this was going to the...

You're right Stem, there is an internal pump which is connected to the PCB on the x18 connector (green block next to 230v block). I'm talking about an additional, external grundfos pump which is placed on the pipe work near the valves. I guess this was placed to improve the flow (11 rads two...

Thanks Harry, with a classic junction box there is a cable going from the 230v RT block on the boiler PCB to the junction box and controls near the valves and cylinder (say an airing cupboard). With a wiring centre it's different, there is the ebus going from the PCB on the boiler to the wiring...

Thanks Both, This is for a Vaillant Ecotech 637 plus, unvented external cyl, two MRVs and the grundfos. When setup in relay mode with a classic junction box the grundfos gets to operate when told to do so by the programmer. With a Vaillant wiring centre there is no block for external grundfos...

Hi All S-Plan with two MRVs (CH and DHW). Valves are controlled by a Vaillant wiring centre. When calling for CH the CH valve opens and boiler fires, all good. How do you connect a CH water pump (type grundfos) to this wiring centre? It has a live neutral and earth but if all connected to 230v...

Hi Bionic-Arm, looking to do exactly the same thing here: S-plan 2 valves, same boiler, same internet gateway, same thermostat, same wiring centre (!!!) Do you use the myVaillant app and are you happy with it? It looks good on the Vaillant videos but the PlayStore app reviews are scary (failed...