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Its a manual red turny handle type bypass, not automatic. I watched a video yesterday that explained to just open it slightly, just to let a little water get through for when the valves arte shut down by the stats/clock. However, when both valves shut the boiler should stop firing, but there...

Wow! Ace! Ta :)

Yup this is my main concern really due to locations of bothe the boiler and the vent/valves etc.... I don't think anyone has answered my wiring questions. maybe you could advise........Is it acceptable to run electrical cables externally? Obviously this would be miles better than tearing a...

Ok....pump location seems to be the one..... would you agree that this is the place the pump should be (green circle)? Ignore the return label on the pipe, that's actually hot water to taps... The pipe returning to the boiler is actually the white pipe running in the same direction to the right...

Whats your point here? Is it that Alpha boilers need some sort of special installation techniques that confuse people, or the type of people that install Alphas are incompetent?

No, the hive receiver is up in the loft where the wiring centre is already unfortunately.

It def was. To be honest they were clueless. I had to get them back after they wired the thermostats and programmer in wrong. Is there a particular skilled person I'm looking for that will have a better understanding of an open vent system, and not just try to sell me a new combo and full...

On mine the feed is a 15mm pipe out the bottom of the feed tank, it then enters a vertical 22mm pipe just after the horizontal tee from the vertical flow/vent pipe. its pretty much exactly as the sketch shows, you can also see this setup in the previous pictures I took in my loft space. With...

Hi Hot&Cold No i don't have the Alpha 2 channel programmer, but do have a 2 channel setup now as we've had a hive thermostat and receiver installed. The pump is currently wired to the boiler, but straight after the boiler (ground floor at back of house) on the flow pipe before the vent. The...

These are the areas of the manual that I've read that is giving me the ideas things need changing, and that the pump needs to be connected to the boiler..... however i have 2 2 port valvs rather than a single 3 port.

What is overpumping? Water coming out of the vent? I'm 99.9 percent sure this isn't happening as I've sat and watched and not seen anything come out the vent, but something is getting up the cold feed as it glugs every now and again and the water is warm to the touch (someone has said this can...

There's not much more to show in a sketch, but I have added some extra info in this one which may help. I'm not sure what you mean by the cold feed being teed off somewhere? The cold water feed that comes from the tank, is shown in the sketch and the picture. Its a 22mm pipe dropping from the...

Exactly as I thought, however the pump needs to be connected (electrically) to the boiler due to the overrun function. Getting a connection up there is going to mean a lot of upheaval with regards to running the cable. Unless I can run a cable externally up the side of the house? Is that...

I can't see that anything is coming out the vent when I've monitored it for a while, but I presume it's because it's quite high so it finds its way round the junction to the cold feed before actually making it to the end of the vent. It does get quite warm so I presume some hot water is making...

Basically, all that stuff on the left of the picture is up in the loft, the boiler is on the ground floor at the back of the house with the pump right after it on the flow pipe. I have attached a picture but the pipe labelled return is incorrect. I think that's actually the hit water going to...

Because the water tank, expansion tanks, valves etc are all up there. For the pump to be placed where i think it should be (after the feed but before the valves), it would need to be there (i think).

I can't see an arrow unless its up on top. Its quite high, so cant see the top easily. However, the pump is pumping away from the boiler and towards the vent.

Ok .. dodgy drawing i know... but hopefully this gives you an idea of whats going on. The pipe thicknesses are to show 22mm vs 15mm. I would think that 15mm pipe is restricting the flow when the CH valve is closed so the water is finding its way up the cold feed pipe. Or would that not be an...

Ok .. just doing some more investigation, and the header tank heating up seems more prevalent when just the water cyl/tank is being heated and central heating valve is off. I think I may have worked out why, or what will probably be making the matter worse. It looks like the route for the...

I have just had a hive setup introduced into my system, so I wonder if that has made any of the existing wiring running from the boiler to loft redundant, which could then be repurposed as a run to connect pump to boiler from loft, if I had the pump moved?Worth looking into I guess?