Baxi 105HE Repressurise

memphuklf

That's what I'm saying. The heating return valve doesn't close and when I remove either the entire filling loop or the cap like in the above photo it drains the system. Basically what I'm saying is that now I have filled the system I will not be able to remove the filling loop and have it like the original photo above. I know I can remove the braided pipe in between the filling loop valves.

cameltoe wrote: »

Doh!

The heating return valve on the boiler is normally open, like all of the other isolation valves on the boiler wall plate. These valves are used to isolate the boiler from the system pipework e.g. to allow the boiler to be removed from the wall without totally draining down the whole system.

If both filling loop valves are closed, the filling loop (the flexible braided metal part) can be removed using the hand tightened couplings at the end of the of the loop with no water loss apart from the contents of the filling loop. You do not use a wrench to remove the filling loop and it's isolation valves together!

Rubidium

memphuklf wrote: »

That's what I'm saying. The heating return valve doesn't close and when I remove either the entire filling loop or the cap like in the above photo it drains the system. Basically what I'm saying is that now I have filled the system I will not be able to remove the filling loop and have it like the original photo above. I know I can remove the braided pipe in between the filling loop valves.

Unbelievable!

Why have you removed the filling loop isolation valves?

The isolation valves have to stay in situ otherwise they can't isolate the filling loop can they!

You simply undo the hand tightened couplers at each end of the silver metal braided part and remove the filling loop!

memphuklf

Haha.

I haven't removed anything. When I moved in that was it was like. I still have the filling loop in place. I was just showing you what it looked like. All I need to do now then is remove the braided hose then. Any reason why I can't leave this on?

cameltoe wrote: »

Unbelievable!

Why have you removed the filling loop isolation valves?

The isolation valves have to stay in situ otherwise they can't isolate the filling loop can they!

You simply undo the hand tightened couplers at each end of the silver metal braided part and remove the filling loop!

Rubidium

memphuklf wrote: »

Haha.

I haven't removed anything. When I moved in that was it was like. I still have the filling loop in place. I was just showing you what it looked like. All I need to do now then is remove the braided hose then. Any reason why I can't leave this on?

Most people do leave the filling loop in situ, however if the isolation valves do not shut off completely, your system can gradually become over pressurised causing the PRV to blow. These do not always seal again when the pressure is dropped requiring a new PRV to be fitted.

southcoastrgi

Now I see why you are having probs, the two valves on the filling loop would normally be connected to tees on the copper pipes from the boiler & NOT connected to the boiler iso valves that's not what those two caps are for

memphuklf

southcoastrgi wrote: »

Now I see why you are having probs, the two valves on the filling loop would normally be connected to tees on the copper pipes from the boiler & NOT connected to the boiler iso valves that's not what those two caps are for
Not sure I understand what you are saying. Are you saying that I was/am missing some fittings or am I OK now with the complete filling loop in place?

Rubidium

memphuklf wrote: »

southcoastrgi wrote: »

Now I see why you are having probs, the two valves on the filling loop would normally be connected to tees on the copper pipes from the boiler & NOT connected to the boiler iso valves that's not what those two caps are for

Not sure I understand what you are saying. Are you saying that I was/am missing some fittings or am I OK now with the complete filling loop in place?

See the Baxi 105 HE Installation manual

southcoastrgi

TBH I don't care what the MI says, you wouldn't connect a filling loop there, the caps are there to be removed to access two filters, on some boilers inc some Baxi models the filling loop is provided & does connect there, but I've never seen a 105 with the filling loop fitted there

Rubidium

southcoastrgi wrote: »

TBH I don't care what the MI says, you wouldn't connect a filling loop there, the caps are there to be removed to access two filters, on some boilers inc some Baxi models the filling loop is provided & does connect there, but I've never seen a 105 with the filling loop fitted there

You would if you wanted to do a neat job, with the filling loop out of sight as shown in Fig 5 above.

Fitting the valves onto tees as per you post #35 would result in an unnecessarily untidy install and it would look a mess if in full view in a kitchen etc. The pipework beneath the boiler can easily be boxed in, if the filling loop is hidden within the boiler.

There is a picture of a filling loop fitted in this way to a 105 HE in post #1 that you commented on only two months ago.