Vaillant Boiler Over Run control

[Leslie1407]

Hello,

I've just had a regular Ideal boiler (15 yrs ols) removed and replaced with a Vialliant 430 boiler with Nest control. My Boiler is located in my garage but the Nest is in the emersion cupboard. The pump is located in the emersion cupboard. The boiler requires a separate feed from the control board back to the Pump and is referred to as the Over run feed. This keeps the pump going for a few minutes after boiler call for heat is stopped. Now here is the issue, I don't want to pull up all the floors to lay a new feed for just the overrun so I'm thinking if I use the signal at the boiler (240v) to power a remote WiFi or RF transmitter to signal over run and then place the receiver in the emersion cupboard that picks up the trigger and sends 240v feed to the pump and when over run turns off the signal is stopped and the pump feed is removed. Simply really but can I find such a unit to do this, nope so can anybody suggest such a device otherwise I'm going to have to make my own.

Les

 

[ShaunCorbs]

MAINSLINK 500M WIRELESS MAINS TO MAINS 230VAC LINK

 

[Aire]

Is overrun still required on these boilers? Haven't wired up a conventional boiler in a while but I can't seem to find anything in the manual stating it is required, but then I can't see anything saying it isn't either.

 

[Riley]

MAINSLINK 500M WIRELESS MAINS TO MAINS 230VAC LINK

Cracking bit of kit Shaun

 

[Sharp Point]

MAINSLINK 500M WIRELESS MAINS TO MAINS 230VAC LINK

Marvellous!! I’m bookmarking that link

 

[ShaunCorbs]

Is overrun still required on these boilers? Haven't wired up a conventional boiler in a while but I can't seem to find anything in the manual stating it is required, but then I can't see anything saying it isn't either.

in theory no but better

alu hex must
ss recommended

 

[Old Account]

MAINSLINK 500M WIRELESS MAINS TO MAINS 230VAC LINK

Have you used it before ?

 

[ShaunCorbs]

Have you used it before ?

Yes

 

[Harvest Fields]

Hello,

I've just had a regular Ideal boiler (15 yrs ols) removed and replaced with a Vialliant 430 boiler with Nest control. My Boiler is located in my garage but the Nest is in the emersion cupboard. The pump is located in the emersion cupboard. The boiler requires a separate feed from the control board back to the Pump and is referred to as the Over run feed. This keeps the pump going for a few minutes after boiler call for heat is stopped. Now here is the issue, I don't want to pull up all the floors to lay a new feed for just the overrun so I'm thinking if I use the signal at the boiler (240v) to power a remote WiFi or RF transmitter to signal over run and then place the receiver in the emersion cupboard that picks up the trigger and sends 240v feed to the pump and when over run turns off the signal is stopped and the pump feed is removed. Simply really but can I find such a unit to do this, nope so can anybody suggest such a device otherwise I'm going to have to make my own.

Les

Are you Gas safe registered? You stated that you have had the boiler fitted but then state that you do not want to lift boards?

 

[Harvest Fields]

in theory no but better

alu hex must
ss recommended

Vaillant say that they do not need one but then they released a suppressor because they realised they did need one. I would steal a wire from the old timer cable if you have gone RF

 

[Leslie1407]

Is overrun still required on these boilers? Haven't wired up a conventional boiler in a while but I can't seem to find anything in the manual stating it is required, but then I can't see anything saying it isn't either.

Hi Craig, yep the engineer tells me its required.

 

[Harvest Fields]

Hi Craig, yep the engineer tells me its required.

See my post above. No need to take floors up.

 

[Leslie1407]

Are you Gas safe registered? You stated that you have had the boiler fitted but then state that you do not want to lift boards?

Hi, nope engineer fitted the boiler and its working fine without the over run but for it to be covered under warranty it should have the over run wired in. When I say I don't want to cut up the flooring because they not floor boards but the chipboard stuff and its likely to cause a mess. I've already had somebody reply with the info I needed regards the remote kit so all good.

 

[Leslie1407]

MAINSLINK 500M WIRELESS MAINS TO MAINS 230VAC LINK

Cheers Shaun, this is the thing I wanted.

 

[Harvest Fields]

Hi, nope engineer fitted the boiler and its working fine without the over run but for it to be covered under warranty it should have the over run wired in. When I say I don't want to cut up the flooring because they not floor boards but the chipboard stuff and its likely to cause a mess. I've already had somebody reply with the info I needed regards the remote kit so all good.

Your missing my point. Your going to spend £99.00 on an RF box when you could just use a cable from the old timer as that cable will go to the 10 way in the airing cupboard and the boiler. The old wiring is now redundant as the rf receiver is now in the airing cupboard?

 

[Aire]

Would the rf receiver have any effect on warranty? As it's not permenatly wired then it could be argued that the signal may not work 100% of the time. If there was ever an issue with overheating and a warranty claim was made, something like this may go against you.

 

[Harvest Fields]

Would the rf receiver have any effect on warranty? As it's not permenatly wired then it could be argued that the signal may not work 100% of the time. If there was ever an issue with overheating and a warranty claim was made, something like this may go against you.

Good point. Didn’t think of that. My ideas looking better and better.

 

[garygvl]

Your missing my point. Your going to spend £99.00 on an RF box when you could just use a cable from the old timer as that cable will go to the 10 way in the airing cupboard and the boiler. The old wiring is now redundant as the rf receiver is now in the airing cupboard?

not always

 

[garygvl]

Would the rf receiver have any effect on warranty? As it's not permenatly wired then it could be argued that the signal may not work 100% of the time. If there was ever an issue with overheating and a warranty claim was made, something like this may go against you.

these things are ok but not 100% reliable yet

 

[ShaunCorbs]

these things are ok but not 100% reliable yet

nothing is ever 100% reliable but somehow people keep putting wireless stats in

 

[garygvl]

nothing is ever 100% reliable but somehow people keep putting wireless stats in

yes shaun but wireless stats and wireless pump overrun are two totally different things

 

[ShaunCorbs]

yes shaun but wireless stats and wireless pump overrun are two totally different things

use the same principle but ok just use a time delay relay call goes off time delay relay kicks in for 5 mins done there your pump overrun

 

[garygvl]

use the same principle but ok just use a time delay relay call goes off time delay relay kicks in for 5 mins done there your pump overrun

if your wireless stat doesnt work no harm to the boiler just no heating but if wireless pump overrun inop different issues

 

[ShaunCorbs]

if your wireless stat doesnt work no harm to the boiler just no heating but if wireless pump overrun inop different issues

how as they have a flow switch so the heating will just turn off

 

[garygvl]

how as they have a flow switch so the heating will just turn off

so no pump overrun

 

[ShaunCorbs]

so no pump overrun

or heating so no harm

 

[garygvl]

or heating so no harm

still need pump overrun on hot water so whenever boiler fires still needed depending on manufactures instructions

 

[ShaunCorbs]

still need pump overrun on hot water so whenever boiler fires still needed depending on manufactures instructions

only with combis this is a heat only but then you wouldnt need the rf solution as its inside the boiler

 

[garygvl]

only with combis this is a heat only but then you wouldnt need the rf solution as its inside the boiler

heat only are the most prone to this issue depending on boiler siting and pipework after boiler.

 

[ShaunCorbs]

heat only are the most prone to this issue depending on boiler siting and pipework after boiler.

still doesnt answer your question why would a heat only need the pump overrun on hot water (when the hot water is used)

so whats the issue when the boiler doesnt have its overrun (safety wise)

 

[garygvl]

still doesnt answer your question why would a heat only need the pump overrun on hot water (when the hot water is used)

so whats the issue when the boiler doesnt have its overrun (safety wise)

its not a safety issue boilers will lock out on overheat if heat not being dissapated after stat shuts them down. its the long term damage being done to the heat exchangers that is the problem

 

[ShaunCorbs]

would be best but not mandatory on ss hexs as they can take the heat

 

[Leslie1407]

Your missing my point. Your going to spend £99.00 on an RF box when you could just use a cable from the old timer as that cable will go to the 10 way in the airing cupboard and the boiler. The old wiring is now redundant as the rf receiver is now in the airing cupboard?

All the cables between the boiler and the immersion cupboard are all used the engineer tells me. I either place a new cable under the floor back to the boiler just for over run or I use the RF kit i'm told.

 

[garygvl]

its not a safety issue boilers will lock out on overheat if heat not being dissapated after stat shuts them down. its the long term damage being done to the heat exchangers that is the problem

ok shaun could have had a debate

 

[Harvest Fields]

not always

Agreed. But if it has been done properly it will.