Recent content by pbanks

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    Vaillant Ecotec 418 regular boiler; which hot water cylinder to use?

    So the newer 418 boiler doesn't have a D70 setting to set the position of the 3 port valve to the centre position??. So it can't be set to try and heat the water and the rads at the same time?. Sounds strange. You're are in the same situation as myself though as I have to set D70 to 0, (water...
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    Vaillant Ecotec 418 regular boiler; which hot water cylinder to use?

    Thanks, I've changed the bypass valve to 1.5 & the Wilo to fixed speed of 2. Take it you don't rate the auto setting on the Wilo pump :-) . That it just made it regulate itself to the required speed depending on the back pressure??.
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    Vaillant Ecotec 418 regular boiler; which hot water cylinder to use?

    Hoping I may have got somewhere -- I've upped D78 on the boiler (storage charging temp limit (target flow temp in storage mode)).I changed it from 76 to 83c . This has allowed the flow temperature to go up when it is doing the water and I think its allowed it to maintain the required...
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    Vaillant Ecotec 418 regular boiler; which hot water cylinder to use?

    Think that's what I may have ??. It was bought from one of the DIY stores in the 1990's when I revamped the bathroom & moved the tanks\cylinder etc. Strange that manufacturers don't readily put the kw rating of the heating coil that's inside the cylinder??. Must be more important to know what...
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    Vaillant Ecotec 418 regular boiler; which hot water cylinder to use?

    HI, yes, I already have D77 set to 5kw so that it doesn't bombard the cylinder when it's doing the water heating, but it still does the cycling when it gets the water near the target temp. I also previously came across another problem and had to set D70 "water priority" to position the 3 port...
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    Vaillant Ecotec 418 regular boiler; which hot water cylinder to use?

    Thanks for your reply, So from what you say it's normal for the boiler to cycle when the water temperature in the tank gets near it's target temp. I was thinking it shouldn't. I'll have to do some more monitoring on it to see how long its doing the cycling to see if I'm bothering unnecessarily...
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    Vaillant Ecotec 418 regular boiler; which hot water cylinder to use?

    I'm trying to find what to look for to get the correct spec. hot water cylinder to work with my Vaillant 418 boiler. Any recommendations for a conventional indirect open vented hot water cylinder that would be the best spec. heating coil wise to go with the Ecotec 418plus.? The existing tank is...
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    Vaillant Ecotec plus 418 engineer programming question.

    There should have been a printed copy of the installation manual and a user manual with the boiler. Don't change any settings just go into them to have a play :-) .
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    Vaillant Ecotec plus 418 engineer programming question.

    the installation manual is here :- https://www.vaillant.co.uk/downloads/ecotec-plus-installation-servicing-2008-261450.pdf Page 34 has the instructions how to enter 2nd level diagnostics mode -set D97 to 17. to change max output of boiler change D0 to required KW . In your case 15 . Wouldn't...
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    Vaillant ecotec 418 wont heat both water and rads succesfully

    Don't think the boiler should need the vr10 directly connected if the vr65 and eBus is used?? . The vr10 came with the vr65 and has the plug and connector to plug sraight into the vr65 . It would be difficult to run yet another wire from the hot water tank back to the boiler for just the vr10.
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    Vaillant ecotec 418 wont heat both water and rads succesfully

    The Vr10 currently connects into the VR65 and I think that tells the boiler via the eBus what the state of play is. The boiler gets the message somehow because its D35 setting shows the changes and shows "40" which is supposed to be mid position, but the actual valve doesn;t go to mis postion...
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    Vaillant ecotec 418 wont heat both water and rads succesfully

    Yes, I've done all that and set D70 to "1" , but when using the VR10 the valve doesn't go to the mid position, even though the boiler D35 settings shows it as 40 which should be mid position. When using the cyl stat it does go to the mid position. Problem then is the boiler doesn't ramp up the...
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    Vaillant ecotec 418 wont heat both water and rads succesfully

    I've tried both the cyl stat and the VR10 (not both connected at the same time!) . using the cyl stat the valve goes to the mid postion but with the VR10 it never seems to go to the mid position even though D35 on the boiler does change to "40" (centre position) when both heat and water are on...
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    Vaillant ecotec 418 wont heat both water and rads succesfully

    I have a Vaillant 418 on a Y plan. I'll try to explain problem briefly -- I can't get it to do both water and rads at the same time. With the 3 port valve in mid position (d70=1), the boiler only uses the D77 setting of 7KW and so it doesn't have a high enough KW output to do both rads and...
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