Replace timer with Hive, only 3 wires

[ianmcd]

Page 36 fig 21, make sure you havent inadvertently adjusted the mode selection swich when working on the boiler it should be set to "Normal "

Worcester 24-28 i Junior Installation and Servicing Instructions | Worcester Bosch

central heating boilers, combi boilers, gas boilers, oil boilers, gas central heating, heating engineers, boiler installation, boiler repair

www.worcester-bosch.co.uk

 

[tim888]

Page 36 fig 21, make sure you havent inadvertently adjusted the mode selection swich when working on the boiler it should be set to "Normal "

Worcester 24-28 i Junior Installation and Servicing Instructions | Worcester Bosch

central heating boilers, combi boilers, gas boilers, oil boilers, gas central heating, heating engineers, boiler installation, boiler repair

www.worcester-bosch.co.uk

Mode switch is at Normal.
Pressure seems slightly higher than this morning and its working again!
No idea what's changed in the last few hours!

 

[ianmcd]

The pressure was a bit low this morning, set it to about 1.5 Bar when the sytem is cold, it will go slightly higher when the system heats up , that is normal

 

[tim888]

Do I just turn the red dial to set the pressure?

 

[CBW]

Do I just turn the red dial to set the pressure?

On the pressure gauge? - no. This is done by a filling loop or key on some Worcester boilers.

 

[ianmcd]

post a pic of the pipe arrangement under the boiler so we can see which set up you have , the red dial is simply a moveable indicator, it is just a bit of plastic, it doesnt actually do anything

 

[tim888]

post a pic of the pipe arrangement under the boiler so we can see which set up you have , the red dial is simply a moveable indicator, it is just a bit of plastic, it doesnt actually do anything

 

[CBW]

Filling loop key and that wiring on the left is a bit dangerous

 

[tim888]

Filling loop key and that wiring on the left is a bit dangerous

OK I'll tidy up the wiring. Is adjusting the pressure something I can do? The manual makes it's sound a little complicated...

 

[CBW]

The manual makes it's sound a little complicated...

Yes, fairly easy. If you have the key insert into the hole, next to the white square knob, and lock into place, 1/4 turn iirc, slowly open white knob and watch pressure rise and take to approx 1 bar and close white knob and remove key - be prepared for a small couple of drips once removed.

 

[tim888]

I've no key, but found it on amazon so I'll have one soon!
Just to confirm, turn key to unlock, turn hexagonal knob (not the square one) to increase pressure then turn key back to lock position?

 

[ianmcd]

 

[ianmcd]

turn hexagonal knob (not the square one) to increase pressure

No the hexagonal one is a drain you turn the square one, there is a fitting with a brass blanking cap on the furthest right hand pipe, can you post a pic of that side on, looks like it might be an isolation valve , you might have an external filling loop also

 

[tim888]

No the hexagonal one is a drain you turn the square one, there is a fitting with a brass blanking cap on the furthest right hand pipe, can you post a pic of that side on, looks like it might be an isolation valve , you might have an external filling loop also

 

[ianmcd]

View attachment 298350

Yes as I suspected that is a non-return valve for a filling loop, Do you have a short silver braided hose, somewhere ?