Installing a Filling Loop on WB 24i Junior

[sst1]

Hi all, I've got the same pressure issue that any other 24i Junior owners have and found the advise on re-pressuring through the filling loop.

However, I don't have the filling loop and have ordered a new one - installation looks quite simple except for the first step - the isolation valves. Seeing as an isolation valve couldn't be on either side of the pipe (as you'd just get water coming from the otherside) can I assume that the isolation valve is the small screw on the bottom of the CH and Cold water intake pipes?

I.e. when turned it blocks the screw (which you remove to install the loop) so that water doesn't gush out?

Any help would be great, thanks!

 

[bengasman]

Your post is not overly clear.
Pressure loss has nothing to do with the model of the boiler, it is caused by a leak that could be in the boiler or somewhere else.

Do you mean you don't have a filling loop at all, or just lost the braided hose?

FAQ shows examples.

 

[doitall]

The ijunior has a charging link if fitted, although they recommend fitting a normal filler loop on the heating return.


You have a isolating valve on the mains and a non-return valve the boiler end, take a note of the arrow which should be pointing towards the boiler.

 

[sst1]

Sorry I'll clarify.

1/ The pressure loss was caused by bleeding one of the radiators.

2/ It's [the filling loop] an optional extra. It goes between the CH Return & DHW Inlet connection. (Part 7 716 192 281)

There are two small screws on the bottom of the CH/DHW valves that you plug the filling loop into - my question is are these the isolating valves or are they someone else?

Thanks!

 

[bengasman]

I think you will have to post a couple of pics; unfortunately I don't know if you meant the same thing as I do when you mention a screw.

 

[sst1]

The instructions are here: http://www.worcester-bosch.co.uk/ca...arging-link-fitting-and-user-instructions.pdf

And here is a picture of the valves you connect it to:

Untitled

• sst1
• 12 Sep 2009
• 1

If you look at figure 1 of the PDF, notice the Blank plugs - I'm assuming the isolation valves are the screws on the bottom of those valves (from the JPG) - so that when you unscrew them water doesn't gush out?

Thanks guys!

 

[bengasman]

Correct. Unscrew the right blank plug, and water will come out until the whole system is empty. Take the left one out, and water will come out until the watercompany has used it's reserves.
The latter can take considerably longer.
Both will make a mess.
The screws underneath should close the pipes, the problem is that you don't know if they work properly.

 

[sst1]

Ah as I thought then - I was going to start with the cold water inlet and turn the mains water off. Wouldn't want the entire UKs water supply in the Kitchen. Messy indeed.

Thanks for all the help!

 

[bengasman]

Just noticed what looks like limescale build up on the return connector, that would indicate a longterm leak and possibly corrosion of the system. Would be a good idea to correct that before it becomes a really big problem.

 

[kevplumb]

The screws underneath should close the pipes, the problem is that you don't know if they work properly.

or will leak afterwards

 

[sst1]

Yeh I only just noticed it when I had a look down there, it's gonna be getting a service soon so I can have a chat with the guy then about cleaning it all up.

 

[dextrous]

The question I have is as to how the system was ever filled up to pressure in the first place? There must be a filling loop somewhere within the heating pipework already. So, op, what's below the boiler?

 

[sst1]

God knows, I bought the place about a year ago and it was already like that and as you can imagine I was pretty confused myself. I'm not sure if it was filled up and the part removed because the installer thought they didn't need it or whatever.

However, the radiators all need bleeding badly and the pressure is already around 0.6 so it may be that the previous owner had it installed and never had to fill it up after installation and never wanted to bleed the radiators because she didn't know how/didn't know how to re-pressure.

 

[dextrous]

Possibly. But I'd still be inclined to look somewhere within the vicinity of the boiler for any openings in the plasterboard (or at the back of a kitchen cupboard if that's where the boiler is) or even loose floorboards for an existing filling loop.

 

[bengasman]

The question I have is as to how the system was ever filled up to pressure in the first place?

Expanding Water Technology Device. This was developed by Ideal in response to a designflaw in one of their models that lead to frequent problems with lack of pressure. The logic behind it is that if you bring out a new model and claim it is actually quite good because it is a whole new thing, some people will believe you.

The word gullible will be removed from the next editions of Webster's.

Worcester does not subscribe to the use of Expanding Water Technology Devices, and will only warrantee a boiler that is fitted with a WB filling loop, or an approved universal one.