Worcester, Greenstar Ri problems

[Scornio]

Hi all,

I've been asked to wire up this new boiler which is on an existing y-plan system. It should be a simple case of giving it a permanent live...apparently. However on the existing y- plan the over run pump ( in airing cupboard) live comes off the oranges, which I believe to be the s/l... So I've taken a perm live to 230v term at boiler easy bit, then separated live to pump at wiring centre away from oranges and gave a perm live(refer to 3rd paragraph)

I know end result should be LP is live to pump... Np is neutral to pump then lr is S/l from oranges.

The existing cores being used at old boiler was s/l and N with a spare core so used this temporarily to attach on to separated pump live to give perm live and at boiler term LP believing that LP is automatically linked as a perm live within boiler this should give the pump its perm L and use the neutral within wiring centre.
The problem I have is that the pump is not cutting out after 5 mins why? Is it a case of wiring as I know the end result to be?
New to y- plan any help would be great.

 

[chris murphy]

Hi all,

I've been asked to wire up this new boiler which is on an existing y-plan system. It should be a simple case of giving it a permanent live...apparently. However on the existing y- plan the over run pump ( in airing cupboard) live comes off the oranges, which I believe to be the s/l... So I've taken a perm live to 230v term at boiler easy bit, then separated live to pump at wiring centre away from oranges and gave a perm live(refer to 3rd paragraph)

I know end result should be LP is live to pump... Np is neutral to pump then lr is S/l from oranges.

The existing cores being used at old boiler was s/l and N with a spare core so used this temporarily to attach on to separated pump live to give perm live and at boiler term LP believing that LP is automatically linked as a perm live within boiler this should give the pump its perm L and use the neutral within wiring centre.
The problem I have is that the pump is not cutting out after 5 mins why? Is it a case of wiring as I know the end result to be?
New to y- plan any help would be great.

"Hello Scornio",

I cannot comment about the Wiring details above - BUT - I can tell You that a Boiler that requires a Pump Over-run has the Pump wired directly to dedicated Terminals within the Boiler Electrical connection compartment.

The Pump Over-run is controlled by the Boiler - when the Heat is dissipated from the Boiler Heat Exchanger the Pump over-run is stopped.

Because of this the Pump cannot be just wired to the Wiring Centre as in the various `S Plans` and `Y Plan` etc.

I hope that other Members can explain this in more detail / Electrically.


I hope that this is helpful.


Regards,

Chris - Heating Engineer / Heating, Plumbing & Gas Contractor

 

[electric will]

Agree with chris, you need to take a cable from the boiler straight to the pump. Then the pump is only controlled by the boiler, I see your on a y plan so my next question doesn't effect you.
chris, on boilers with pump over run but on a s plan, when the boiler has shut down, the valves are closed, while on pump over run where does the water circulate to?

 

[chris murphy]

Agree with chris, you need to take a cable from the boiler straight to the pump. Then the pump is only controlled by the boiler, I see your on a y plan so my next question doesn't effect you.
chris, on boilers with pump over run but on a s plan, when the boiler has shut down, the valves are closed, while on pump over run where does the water circulate to?

"Hello electric will",

Boilers that have a Pump Over-run MUST have Bypass Pipework for that purpose.

On most Boilers this has to be Installed with the rest of the Boiler Pipework - it has to be of a specified length [Manufacturers Specify] in order to be able to Dissipate the Heat that the Pump Over-run pumps around the Bypass and therefor normally needs to be NOT Insulated - this can sometimes complicate Boiler Installations in `Out Bulidings`.

Some Boilers have a Built in Bypass - this means that the Pump Over-run is operating for much longer to Dissipate the Heat from the Heat Exchanger.


I hope that this is helpful.

Regards,

Chris

 

[Tiny_Lec]

Hi Chris can a roomstat used in Y plan be connected to a newly installed combi. Old stats got three core and earth. If yes which wires need be used. Thanks

 

[chris murphy]

Hi Chris can a roomstat used in Y plan be connected to a newly installed combi. Old stats got three core and earth. If yes which wires need be used. Thanks

"Hello Tiny_Lec",

Because I am a Heating Engineer - Heating, Plumbing and Gas Contractor I ONLY give answers and Advice on the Mechanical / Technical / Regulations aspects of those Trades - NOT any Electrical advice / details.

I have made a point of stating this on the Forum - so I must leave all Electrical questions to the Electricians / Electrical Engineer Members.


I am active on here to `Pay Back` for some very helpful advice that I received in October 2011.


I am fairly sure that You will get an answer fairly quickly later Today - please don`t be offended - You might need to reword your question with a bit more information to get an answer.

Sorry thast I cannot help You with your question.

Regards,

Chris

 

[Geordie Spark]

Hi Chris can a roomstat used in Y plan be connected to a newly installed combi. Old stats got three core and earth. If yes which wires need be used. Thanks

Just fit one of these Drayton Room Thermostat RTS8 - Boiler Controls - Heating -Tools, Electrical & Plumbing - Wickes

I think Screwfix sell them too for about the same price.

and wire it as a 2 wire ..... not expensive at all and saves any hassle getting a neutral to the stat.

 

[chris murphy]

"Hello Geordie Spark",

Up Late Tonight [02:43 Hrs] !

Good Advice to Tiny_Lec.

Regards,

Chris

 

[Geordie Spark]

"Hello Geordie Spark",

Up Late Tonight [02:43 Hrs] !

Good Advice to Tiny_Lec.

Regards,

Chris

Hi Chris

Hope you're well.

I'm off to my pit shortly - getting tired now - and hoping for a good nights sleep. Not sleeping well just now because of back pains and an eye infection that painful & driving me mad.

I was going to jump onto your thread about the wire for your outside lights, but you were getting enough good advice anyway so anything I offered would have been superfluous.

 

[Geordie Spark]

Those Drayton Combi Stats are what I've used a few times and they're fine for most applications so I can confidently recommend them.

 

[chris murphy]

Hi Chris

Hope you're well.

I'm off to my pit shortly - getting tired now - and hoping for a good nights sleep. Not sleeping well just now because of back pains and an eye infection that painful & driving me mad.

I was going to jump onto your thread about the wire for your outside lights, but you were getting enough good advice anyway so anything I offered would have been superfluous.

"Hello again Geordie Spark",

I am also not Sleeping because of Back Pain and Pain from both Knees - So I know what You are going through.

I am an Insomniac BEFORE the Pain kicks in - So I often don`t Sleep at all !

"Goodnight" I hope You get some Sleep.

Regards,

Chris

 

[Geordie Spark]

"Hello again Geordie Spark",

I am also not Sleeping because of Back Pain and Pain from both Knees - So I know what You are going through.

I am an Insomniac BEFORE the Pain kicks in - So I often don`t Sleep at all some Nights !

"Goodnight" I hope You get some Sleep.

Regards,

Chris

Thanks Chris.

Goodnight to you.

 

[sedgy34]

just to add my 2 penny,, the boiler will have a pump overrun connection this should go from the boiler to the pump so the boiler can run the pump so to pump the hot heating water away from the boiler.

 

[Tiny_Lec]

Never mind Chris, Its sorted now

 

[Tiny_Lec]

Just fit one of these Drayton Room Thermostat RTS8 - Boiler Controls - Heating -Tools, Electrical & Plumbing - Wickes

I think Screwfix sell them too for about the same price.

and wire it as a 2 wire ..... not expensive at all and saves any hassle getting a neutral to the stat.

Thanks Geordie Spark, didn't have to at the end L and S/L worked just fine with the old one.