Ideal Boiler and no heating

paulod123 · 03-11-2023 2:29pm #1

Hi,

We got a new Ideal Logimax S181e gas boiler 2 years ago and now none of the rads heat. All we have are 4 rads upstairs and nothing downstairs.

The downstairs rads were removed and the pipes capped.

I have bled the system but the pressure on the boiler never gets above 0.

I am really trying to understand how the boiler works.

From the below pic the valve on the left would be the inlet (cold water coming from the attic) and on the right the ch return and the middle yellow valve the gas I assume.

We removed all the rads downstairs years ago so there would be still pipes for this. I do not understand why the gas with the yellow valve has pipe going upstairs and downstairs. Is this actually the gas feed?

Sorry the pic is not rotating correctly so left is under the boiler and right is the floor.

You can see the outlet from the yellow valve splits with one outlet going behind the boiler upstairs and the other to the floor. Why, if this is the gas feed?

Am I missing something.

I am trying to figure how to represurise the system so understanding what is what would be a big help.

Thanks.

Lenar3556 · 03-11-2023 8:43pm

The pipes on the left and right are your flow and return. There isn’t a filling point fitted here.

Is it a sealed system? You could check your hot press for a filling loop.

paulod123 · 04-11-2023 6:50pm

Thanks for the reply. It is a sealed system so how is the water topped up? What should I be looking for as I can see a pipe in the hot press that comes from the smaller cold water tank in the attic.

cubix · 05-11-2023 12:11pm

Filling loops may look like photo attached either with or without guage. If none to be found and your old heating header tank in the attic is still active your system may not be sealed and your boiler is being feed from this.

Supposed gas feed I would have thought only goes one way, too/ from the meter but maybe one of the gas tech lads on here will inlighten you.

Screenshot_20231105_120149_Chrome.jpg

Wearb · 05-11-2023 12:34pm

https://www.boards.ie/discussion/comment/121325435#Comment_121325435

Can you explain why you have a small attic tank on a sealed system. There are numerous reasons for it, but I'd need to understand your configuration to advise.

paulod123 · 07-11-2023 10:06am

I must be wrong about it being a sealed system. I cannot find that filling loop anywhere. The feed from the small tank in the attic feeds into the hot press and the pipe disappears under the floor so I cannot trace any further so I do not fully understand how the system gets topped up. That is where my issue is. I have disconnected one of the rads and no water is coming through when the boiler is on.

Wearb · 07-11-2023 10:25am

https://www.boards.ie/discussion/comment/121336127#Comment_121336127

Do you have water in the attic tanks?

Have got a red expansion vessel anywhere? (Probable just the one on the boiler)

Markcheese · 07-11-2023 10:32am

Check to see if the tank in the attic is disconnected, , (no water in the tank or the ball valve ) , if it is you're probably on a sealed system , and there must be a filling loop some where ,

Can you get hold of the plumber who installed it ?

paulod123 · 07-11-2023 11:12am

https://www.boards.ie/discussion/comment/121336277#Comment_121336277

Thanks for the reply. No the tank is full and operational so I must not be on a sealed system.

Markcheese · 07-11-2023 11:16am

Either a valve shut off ? - or an air lock ?

paulod123 · 07-11-2023 12:23pm

https://www.boards.ie/discussion/comment/121336488#Comment_121336488

It was working but was never heating all the rads so all valves should be on. Bleeding the rad makes no diff. There may be a blockage somewhere.

MC5 chemicals were added but I have now been told a Kamco machine may need to be connected to clear any blockages.

Markcheese · 07-11-2023 6:15pm

I'm not saying it doesnt need a flush , but if you've no pressure in the boiler and theres no water coming out of any upstairs pipes you've got another issue ,

But i'm not a plumber .. so take a pro's advice .. i assume it was flushed 2 years ago when the new boiler was fitted .

paulod123 · 09-11-2023 1:45pm

https://www.boards.ie/discussion/comment/121338375#Comment_121338375

Yes and an inhibitor was put in. RGI will be coming out to check so will update the thread then with what the issue is.

paulod123 · 01-12-2023 3:13pm

Just an update as had a RGI out to fix. It is indeed a sealed system and found the feed in the Hot press. It was off via a small single slot screw that open and closes a valve to the cold water feed. Turned on and open the rad valves one by one and fed water back into the system. Once all the rads were full turned valve off again and all working. Thanks for all the advise.

Ideal Boiler and no heating

Comments