How do I wire this 2 port valve into system?

[heytesto]

<div class="bbWrapper"><blockquote data-attributes="" data-quote="doitall" data-source="post: 1225722" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/diy/goto/post?id=1225722" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1225722">doitall said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> Fair enough, he will need to take the L &amp; N from T 3 &amp; 5 in the boiler </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> No, because if he put the boiler into HW only mode the programmer would lose it&#039; power and go blank.<br /> <br /> Ignore T3 and T5. All he needs to do is connect to T4 to fire the boiler!</div>

 

[doitall]

<div class="bbWrapper">You can&#039;t ignore T3.<br /> <br /> T3 &amp; T4 are the switching wires and must be used for external controls.<br /> <br /> And T 3 is permanent live in any mode.</div>

 

[mogget]

<div class="bbWrapper">IIRC, Doitall is right on this one.<br /> <br /> The Ecotec will fire if 240v is put on terminal 4, but the user may turn the boiler off and also expect the controls to be isolated.<br /> <br /> When live and neutral are taken from 3 and 5, the controls will (correctly) be unpowered when the boiler power switch is turned off.<br /> <br /> There&#039;s no need to put the boiler into HW only mode, as the programmer and stats will take care of this.</div>

 

[heytesto]

<div class="bbWrapper">Fair enough mogget. Wasn&#039;t sure if T3 remained live on the Vaillant.<br /> <br /> <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f609.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":wink:" title="Wink :wink:" data-smilie="2"data-shortname=":wink:" /></div>

 

[heytesto]

<div class="bbWrapper">Sensibly thinking though, the OP should have gone the Y-plan route for 2 fully independent zones.<br /> <br /> I recently did a system with 2 UF zones and a 3rd rad zone. The grey wires from the MVs were wired to the external out on the boiler, the oranges back in to fire the combi. <br /> All the other controls, programmable stats, pumps, MV lives etc were wired independently to the boiler.</div>

 

[doitall]

<div class="bbWrapper"><blockquote data-attributes="" data-quote="heytesto" data-source="post: 1225769" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/diy/goto/post?id=1225769" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1225769">heytesto said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> Sensibly thinking though, the OP should have gone the Y-plan route for 2 fully independent zones.<br /> <br /> I recently did a system with 2 UF zones and a 3rd rad zone. The grey wires from the MVs were wired to the external out on the boiler, the oranges back in to fire the combi. <br /> All the other controls, programmable stats, pumps, MV lives etc were wired independently to the boiler. </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> I suggest that on page 1 <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f606.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":lol:" title="Laugh :lol:" data-smilie="18"data-shortname=":lol:" /> <br /> <br /> Just found this in the Vaillant wiring book if it&#039;s any good.<br /> <br /> DRAYTON HW CH HW CH<br /> OFF OFF ON ON<br /> LP241, LP522, LP722 N L 1 2 3 4<br /> Note: X indicates terminal not used t t t t t t<br /> 5 3 8 X 7 6<br /> <br /> obviously 1-8 isn&#039;t used either in this case.</div>

 

[glasgowgas]

<div class="bbWrapper">FFS........96 posts and counting!!!!!!!</div>

 

[doitall]

<div class="bbWrapper"><blockquote data-attributes="" data-quote="glasgowgas" data-source="post: 1225782" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/diy/goto/post?id=1225782" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1225782">glasgowgas said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> FFS........96 posts and counting!!!!!!! </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> Who&#039;s counting <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f606.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":lol:" title="Laugh :lol:" data-smilie="18"data-shortname=":lol:" /> <br /> <br /> 97 I&#039;ll take your word on it.</div>

 

[heytesto]

<div class="bbWrapper">I&#039;ve got the full ACL Drayton training manual here, every conceivable diagram for all systems and add ons. <br /> <br /> Did the course in the early 90&#039;s. Very handy, I often have to tell electricians what to do, as most don&#039;t fully comprehend the working principles. <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f606.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":lol:" title="Laugh :lol:" data-smilie="18"data-shortname=":lol:" /></div>

 

[glasgowgas]

<div class="bbWrapper">100.......woo hooo!<br /> <br /> its like watching your mileometer in the car hit a 1000!!!!!</div>

 

[heytesto]

<div class="bbWrapper"><blockquote data-attributes="" data-quote="glasgowgas" data-source="post: 1225796" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/diy/goto/post?id=1225796" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1225796">glasgowgas said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> 100.......woo hooo!<br /> <br /> its like watching your mileometer in the car hit a 1000!!!!! </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> ROFL It&#039;s been a mighty interesting friday night.</div>

 

[doitall]

<div class="bbWrapper">I know a few sparkies that are good, but agree it&#039;s few and far between.<br /> <br /> It&#039;s a specialist trade really, especially the bigger stuff we do/did.</div>

 

[glasgowgas]

<div class="bbWrapper"><blockquote data-attributes="" data-quote="heytesto" data-source="post: 1225797" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/diy/goto/post?id=1225797" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1225797">heytesto said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> ROFL </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> sorry wots that mean</div>

 

[doitall]

<div class="bbWrapper"><blockquote data-attributes="" data-quote="glasgowgas" data-source="post: 1225799" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/diy/goto/post?id=1225799" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1225799">glasgowgas said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> <blockquote data-attributes="" data-quote="heytesto" data-source="post: 1225797" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/diy/goto/post?id=1225797" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1225797">heytesto said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> ROFL </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> sorry wots that mean </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> Newbeeeeeeeeeeeeeee<br /> <br /> rolling on the floor laughing</div>

 

[glasgowgas]

<div class="bbWrapper"><blockquote data-attributes="" data-quote="doitall" data-source="post: 1225800" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/diy/goto/post?id=1225800" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1225800">doitall said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> Newbeeeeeeeeeeeeeee </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote><br /> No 39 year old heterosexual Scottish male</div>