What is a 3 port valve (mid position valve) why do radiators come on with hot water intro

Рет қаралды 33,278

The heating guy

Күн бұрын

Пікірлер: 48

@rogerthedodger5788 Жыл бұрын

Brilliant visual demonstration! Excellent explanation too.

@stuart-st1gu Ай бұрын

Really! 🥱💤💤💤💤

@carlmoore9951 11 ай бұрын

Brilliantly visually demonstrated.

@Colin623 Жыл бұрын

Genius, such a simple but clever way to explain it, even I could see how it works now, thank you.

@simonblooddevay Ай бұрын

Great YT, thank you! Desperately need the promised follow-up videos. A "plumber" replaced our faulty Motorised Valve Head; but, neither Hot Water nor Heating worked afterwards. Then the MVH & 3-port valve was replaced as a unit. This could only make the Hot Water work; but, not on the desired settings from the programmer, and no combination of settings would bring the Heating on. Both 3-port valves are/were in perfect working order, and I think it unlikely that 2 brand new MVHs would be faulty. Therefore, I would love to see the correct wiring of the MVH into the junction box for the programmer, demand valve, tank thermostat, etc., please.

@petegasguy Ай бұрын

I wish i had the time at the minute. But, honeywell do lots of wiring diagrams which are fairly easy to follow. Essentially, when there is a demand for heat 240v will be sent down the orange wire of the 3 port and this will then power the pump and should kick the boiler in.

@davidlongthorn5571 2 жыл бұрын

Good video I WOULD LIKE TO SEE MORE Thanks from Dave

@Ampex196 Жыл бұрын

Many thanks for the information. Am I correct in thinking the the valve only rotates around 35-40 deg. either direction, ie. from around 10 o'clock to 2 o'clock with mid position at 12 o.clock? My previous unit would rotate a full 360 deg. in one direction only stopping at 3 positions as needed. When the old motor failed I could position it manually whereas this later valve returns to mid position when released. I'm not sure yet what is a fault. The rads. are heating when there should only be hot water. I found that the actuator motor was very hot, and NOT from conducted heat, ie. even when the pipes were cold. I would be grateful for any comments.

@andyp926 Жыл бұрын

Did you ever produce the follow-up videos ypu mentioned. I would love to see them!

@MrKennymac11 2 жыл бұрын

Lovely video mate thanks for that. Would be keen to see the others you have planned!

@grahamnichols1416 2 ай бұрын

Very useful, especially as my plumbers have just replace the valve and now I get heating when the hot water is requested, but nothing at all when I request heating only. Seemingly they are good with valves, but not with wiring. Wiring appears to separate the men from the boys.

@petegasguy 2 ай бұрын

It should be pretty straight forward really… i tend to not touch the wiring centre and just connect cables, like for like from the existing connections - and then make safe. I’d be getting them back and having a little whinge.. perhaps they have it on back to front, or something? If they have you might find that turning the thermostat on the tank stat up - may make the heating kick in or something weird 😂

@grahamnichols1416 2 ай бұрын

@@petegasguy Yeah, but the issue there is assuming (always dodgy ground) that the original wiring was correct. The root issue is that next to nobody bothers to label the wires to begin with.

@petegasguy 2 ай бұрын

Well yes - of course. Assumptions have to be made by the plumber - and ‘technically’ they can’t make amends to that wiring (according to our sparky..)

@MSKChess 2 жыл бұрын

dude I've seen way duller vids than this - this was inspiring! More 3 port valve vods please! :)

@petegasguy 2 жыл бұрын

Thanks mate - but you really need to watch more exciting internet videos … (i promise to clear your internet history should anything bad happen to you..) 👊

@MSKChess 2 жыл бұрын

@@petegasguy Lol I've survived Allen Hart, the only way is up!

@petegasguy 2 жыл бұрын

@@MSKChess me names pete an taday am gonna du stuff… Lol… big al is pretty good to be fair - he knows his stuff.

@Михаиллеви 2 жыл бұрын

Brilliant video. So basically visual. Great idea for dummod like me ! 😀

@pauls826 2 жыл бұрын

Tell you what Pete nice set up that like the torch idea to show it 👏 👍👍👍👍

@petegasguy 2 жыл бұрын

Hiya paul - hope you’re well mate. The little rig is quite useful to see how things move and work… been meaning to do one for a while and then found the perfect opportunity when the mother in law came round for sunday dinner! The torch thing works well i think… although credit for that goes to my 10 year old 😂😂

@jimmyk9523 9 ай бұрын

Should it completely seal one side of the system when it's switched to heating or water only? Mine just restricts it. Can still blow through it if I try

@jordub Жыл бұрын

You mentioned that the Motorhead may be malfunctioning. Is there a 3 way specific motor for these valves?

@ScottRosa2008 7 ай бұрын

Thanks for this video. I have had problems with my heating working intermittently for the last few months. It will work fine for a few days or maybe a week and then the boiler won’t fire when the call for heat is made. If I turn it all off for a couple of days and then start again it will work again for a while. I assumed it was the boiler at fault nd maybe the PCB but then I noticed the hot water on its own works fine, boiler fires no problem and it works as it should. It only seems to be when CH only is selected. I can hear the boiler clicking on and off trying to start so I think it communicates with the room stat, goes to start and then the mid position actuator doesn’t move as it should. Does this sound the likely issue to you because if it was the brass valve then the hot water wouldn’t work either? Thanks.

@petegasguy 7 ай бұрын

Demand for hot water tends to be from the stat on the tank - rather than the 3 port. When heating demand on you should be able to hear the microswitch be clicked… Or, if you take the cover off the head you may be able to actually see the lever hit the switch. Be careful - 240v knocking about. I really will try and knock a video up later today and upload it - been meaning to do one for ages….

@ScottRosa2008 7 ай бұрын

The hot water works fine yes When the heating is selected on the controller I can hear the boiler clicking as if to try and start. I can hear the click in the airing cupboard as well from the actuator, it might go anything from 0 seconds to hearing the pump start for various lengths of time but the boiler won’t fire (but only for CH), sometimes it will work ok and start straight away. The boiler seems to be communicating with everything ok but I just wonder if something inside the actuator is not working every time as it should hence the intermittent business

@arinb12 Жыл бұрын

What happened to the rest of the videos???

@88Henkie88 Жыл бұрын

here it looks like fresh water is going through the same pipe as the dead water inside the closed radiator circuit. but that seems unhealthy that the fresh drink water and radiator water can get in touch even if it is just some small remainings that guided to the new opening.

@petegasguy Жыл бұрын

Wow. Yeah - that doesn’t happen

@karlbassett8485 8 ай бұрын

The hot water that is sent to your hot water tank does NOT come out of your taps. It runs through a pipe in the middle of the tank and then back to the boiler. The fresh water in your tank gets heated up by the hot water in the pipe. They never mix.

@Techland-Digital Жыл бұрын

Brilliant thank you, mine clicks lol and I get heating and water not one or other always both

@petegasguy Жыл бұрын

Yeah - really common fault. Whip it out and replace the whole lot

@ruwin-5703 Жыл бұрын

Will this affect the bill?

@petegasguy Жыл бұрын

Yes - probably.

@Skyrunner13 Жыл бұрын

Well explained.

@johnward5006 Жыл бұрын

Most common reason for warm or hot water flowing to heating system with no demand for heating is poor seating of the valve port.

@petegasguy Жыл бұрын

I wouldn’t say it’s the most common but it does happen. I keep meaning to do a second video on issues/faults but struggling for time… but that’ll certainly be in the list.

@johnward5006 Жыл бұрын

@@petegasguy In my experience, if the valve let's by, change the body. Issues that suggest synchron motor failure, always replace the head. There's so much more going on with how the valve maintains mid and heating only positions.