Automatic Bypass Valve Query

[John.g]

No. Don't "fully open" it. It should be set to operate at the highest pressure difference that allows it to achieve its intended purpose.

If you are determined to play around open it by small amounts, say quarter turns until it reduces the 1840 noise. But, if you open it enough to completely eliminate the 1840 noise you'll probably have gone too far and have replaced one problem with another.

Fully opening it was simply to establish if it was/is plumbed in properly.

 

[John.g]

I have tried opening the lock shield valve a bit and closing it but made no difference whilst the noise was happening. The pump is built in to the boiler and it can run on either 70 percent or 100 percent. It’s on the default of 70 percent.

Any idea what make/model of circ pump fitted.?

 

[Tigermad]

Any idea what make/model of circ pump fitted.?

Hi. It’s inside an Ideal Vogue S32 gen boiler.

 

[John.g]

Hi. It’s inside an Ideal Vogue S32 gen boiler.

Thanks, could you post the setting up instructions of your ABV, it should then be relatively easy to set it up properly.

 

[Tigermad]

Thanks, could you post the setting up instructions of your ABV, it should then be relatively easy to set it up properly.

Here you go. Thanks

 

[John.g]

Here you go. Thanks
View attachment 36907 View attachment 36908

Straightforward enough.
1. Shut off the ABV, turn the setting knob clockwise to o.5
2. Ensure all zones (if fitted) on, and all TRV.s fully open.
3. Turn any/all room stats to max. (my suggestion)
4. Ensure boiler is actually firing or cycling on/off.
5. Very slowly turn ABV setting knob anticlockwise until the outlet pipe starts getting warm/hot.
6. Turn ABV setting knob clockwise by 1/2 a turn.
Forget the rest of the instructions for awhile and you can revisit them later.
Re 5 above. IMO, you can expect the pipe(s) to start to get warm at ~ setting 0.3 to 0.2.

 

[doitmyself]

the abv is before the zone valve from the boiler but after the zone valve coming down from the cylinder.

The ABV must be fitted between the flow and the pipe between zone valve and boiler. If it's on the wrong side of the valve there will be no flow to the boiler when the valve is closed, which defeats the purpose of the ABV.

 

[Tigermad]

The ABV must be fitted between the flow and the pipe between zone valve and boiler. If it's on the wrong side of the valve there will be no flow to the boiler when the valve is closed, which defeats the purpose of the ABV.

Hi. Thanks for the reply. Did you see my pic and post number 3? Does the position looks wrong ?

 

[Tigermad]

The first vertical pipe is the return. This has the zone valve attached. The furthest right says flow from boiler on it. The abv is on a pipe from the return to the flow. I am not sure what the other horizontal pipe is below the horizontal one with the abv. This joins to the flow but has its own pipe going to the boiler on the other end.

 

[John.g]

The first vertical pipe is the return. This has the zone valve attached. The furthest right says flow from boiler on it. The abv is on a pipe from the return to the flow. I am not sure what the other horizontal pipe is below the horizontal one with the abv. This joins to the flow but has its own pipe going to the boiler on the other end.

View attachment 36925
View attachment 36926

I thought it was thrashed out re the ABV positioning and the consensus was that it is installed correctly, my only slight unease concerns the vertical "return" pipe, this has a motorized valve attached which I would have thought is a bit unusual as they are normally installed on the flow.
I will just repeat what I said in some other post above, with the boiler firing normally and up to temperature, open (anticlockwise) the ABV fully to index 0.1, if the pipes on both sides of this don't get "red" hot in less than say 1 to 2 minutes then you have a problem. Just re close (clockwise) the ABV fully to index 0.5 after the test.