Worcester Greenstar 28i Junior Filling Key/Loop

modelreject

Hi,

I need to top up the pressure on my combi.

The key has always been in it and not in the tray under the boiler but the key has always sat in the Locked position.

I have watched a few youtube videos and they insert the key into the the unit in the unlocked position, turn it, then turn the small square knob to let the water in. Then they turn the key back to unlocked.

What is the key/filling loop lock actually doing. There is no description of what locked and unlocked actually is...and I assume it's safe to leave my key in there. Apparently it's a pain to get in and out :-)

Many thanks in advance.

M

southcoastrgi

All the key does is bridge the gap, if you don't put it in there & turn the knob water will pour out the hole where the key goes

modelreject

Thanks. With regards to it staying in there should I move it to the locked position? I probably will keep it in for handiness.

Also, what do you mean by 'bridge the gap'. Just can't picture what is happening internally.

I thought the lock symbol would have meant it was locked from allowing more water it, but appears that you put it back to unlock after filling with more water.

Thanks again

neilmcl

The system is sealed and pressurised so you have to open the system to allow you to fill it up, using the key does exactly that. You should always put it back into the locked position so the CH system remains sealed. You can leave the key there but I'm surprised the tray goes back in place with it there, and tbh it really isn't that difficult to remove it, a good tug down and it'll come out.

modelreject

That’s where it gets confusing. You say locked prostitution but apparently you turn the key to the locked position to fill, then back to unlocked. Can someone please confirm if this is definitely the case. Thanks

neilmcl

modelreject wrote: »

That’s where it gets confusing. You say locked prostitution but apparently you turn the key to the locked position to fill, then back to unlocked. Can someone please confirm if this is definitely the case. Thanks

Sorry, you place the key into the open padlock, turn it to locked which will bridge the gap between the two sections of the filling loop and allow mains water to be filled into the system, then you "unlock" it to close the loop. Then remove the key.

BTW, you can get an optional keyless filling loop fitted. My dad got one fitted for less than £100.

bris

All the key does is seal the area the water passes through to top up the system.


Being locked does nothing special, it doesn't even need to be locked, it's simply a feature so that it cant be pulled out when the filling is taking place. It doesn't need to be left in place when filling or topping up is completed and it's encouraged that it is removed and stored in the tray.

modelreject

Brilliant! Thanks all

d0nkeyk0ng

There's a youtube video on this (I inherited a WB boiler and it uses the same key but I had no instruction manual so was doing the opposite of what was required).