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I have assurance from the manufacturer that if the unit is running at low or medium and this is overridden by running at high this won't be a problem, and it will drop back once the charge on the High speed drops off. So. Tbh I don't fully understand some of the rest of the reply, but it looks...

The sensors are xh-w3005 humidity sensors and put out 240v line and neutral when on. The switch is from Boulder and is like this: The multiple relay looks good but really I dare say I just need a relay triggered and then putting out power when on for line power from any of the sensors or the...

OK. Next in the ongoing saga of plumbing in our MVHR system. I have the following issue. We are installing an MVHR system, which has a low/med/high fan speed run by a remote, wired in switch. All fine, and I asked before how to wire it in, and am doing so with a .75mm yy cable. BUT... I'd like...

Hi. I'm wiring in an MVHR unit, and raised a thread here https://www.diynot.com/diy/threads/wiring-in-an-mvhr-unit.561685/ about it. I was suggested YY cable. The power requirement is shown in red, here By my calculations, I'm needing less than 1 amp, so 1mm cable would work, but I'd run...

Yes, a 3amp FCU for power. I've never seen YY control, before. The one you mention looks OK. This is the power requirement, (in red). What wire size would I need?

I'm wiring in an MVHR unit. I'm doing a lot of wiring on a house build myself, to be signed off later. So, I have this wiring diagram: My query is, apart from the L/N/E in, the rest is from the controller to the unit. So there are a number of wires running between them. Presumably, there's no...

"I've got to ask...........................why a second hand toilet??" You may well ask. But then you may not have a wife who wants a house built, but insists on saving money EVERYWHERE. The toilet was taken out of a relative's bed and breakfast and was virtually new. Frankly, I was kinda...

I have a fairly new secondhand toilet I'm going to install. Looking inside the cistern, though, I see this: It seems the overflow has been masticked closed. A bit weird. If I unblock it, am I likely to have problems? My guess is that for some reason the cistern water level is somehow set...

I have a shower tray with an outlet which runs pretty well straight out to a 40mm outlet then to a waste pipe. I thought the outlet had a trap in it, but it doesn't, and we are getting occasional drain smells, (and occasionally worse...) through the waste. The piping is still accessible, and...

That was it. Bingo. Thanks. Flow temperature too high? Should it be?

The wiring centre is a HeatMiser UH4 As far as I see, there is one manifold. The 4 actuators on the right have no feed to them, but still seem to be warming the floor.

There's one motorised valve for all of them. Then are actuators for each .

Hi. I'm new to underfloor heating, and this may be a silly question, so sorry in advance if it is. We had an underfloor system put in before laying a concrete floor. Baxi boiler now installed, and now the manifold, pump, and all the gubbins are wired in. There are three zones; zone 1 has one...

Ahhh. Thanks for that. No, no other heating source(s). Just the u/f heating.

I'm wiring in a wet underfloor system already laid under concrete, to connect to a new Baxi combi. All good, except that the wiring instructions for the Heatmiser UH4 are a scant. I've worked out the thermostats, actuators, mains in, and ufh pump. The plumber put in a Honeywell 2 port motorised...

I'm doing the wiring in a new build to be Part P tested afterwards. We're having a Baxi combo boiler installed. The wiring says it needs to be "3amp 230v 50Hz supply control using cable of 3 core .75mm 3183Y multiple flexible type" Plan is to run a separate supply off the consumer unit to a...

Any idea where I'd even start to find someone like this?

Hi. We're struggling with HSE. We have a Principal Designer who, it turns out, is a jobbing builder who has dome a number of attics and contracted for other PDs but never done a full PD role himself. HSE have become involved. They want a Construction Phase Health and Safety Plan, he hasn't done...

The work is on a new build, is a work in progress, and will be tidied then tested and signed off on completion.

I have a Triton shower to plumb in. Water and electrics are ready to attach, but the manual says use a compression joint. Two questions? The manual says nothing about needing a copper pipe, but as I remember you sometimes are required to connect copper pipe rather than plastic If I use a...