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  1. M

    Are those fused sockets resting on the floor up to regs?

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

    Can't get return temp down, are those rads / pipe (photos) the problem?

    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...
  3. M

    Boiler overheats in DHW mode (can't keep output at constant level, see video)

    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...
  4. M

    Secondary Grundfos ups2 on vr66 - wiring question

    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...
  5. M

    Vaillant boiler modulating even with on/off thermostat?! Why is this happening?

    Hi All, I have a Vaillant ecoTEC 637 plus, likely fitted ~2017 mounted as a system boiler, single zone, with a separate water tank for DHW. The thermostat is a Salus RT500 wired via the 230v RT connection. There is also a Drayton scheduler. (Small parenthesis: It is also a classic case of...
  6. M

    vaillant thermostat wiring

    Hi All Vaillant ecotech system installation (+ tank for Domestic Hot Water), single zone. Current thermostat is a wireless salus, with a drayton programmer. Myvaillant connect will be installed to program heating times via phone app, directly on ebus connection so no wiring headache for this...
  7. M

    Victorian foundations: is their any point fixing the brickwork in this cellar?

    Hi All Cellar of Midterrace Victorian (likely 1905 ish), not used for anything at all (currently empty) other than hosting the electric board and meter. We're having the front repointed, should we seize the opportunity to repoint the cellar too? One guy said he could render + put insulation, I...
  8. M

    How can I make this boiler installation more efficient? System + tank on/off

    Hi All New house, new boiler! The set-up is: - Vaillant Ecotec Plus 637, system boiler single plan - Tank elson zircon 250zi, no immersion - Programmer Drayton LP722 (dual channel, heating and hot water) - A Salus controller, not too sure what does is used for. As you can see from the PCB...
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