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What was the question i maybe able to help 
How do I wire this 2 port valve into system?
- Thread starter bennboseley
- Start date
you only need to send switch live to no.4
3 and 5 are optional.
How many vaillant boilers have you installed exactly? because you maybe making more work for yourself.
from the programmer, its LINKED for gravity operation, do you know what that means?
lol there's no bodging involved
I'm not gonna argue with you anymore. You don't get it.
To OP, do as I said, all will be fine.
And it will be illegal and not comply with the manufacturers installation manual so the warranty will be invalid, it also fail part P.
lol there's no bodging involved
I'm not gonna argue with you anymore. You don't get it.
To OP, do as I said, all will be fine.
And it will be illegal and not comply with the manufacturers installation manual so the warranty will be invalid, it also fail part P.
absolute garbage. I suggest you go on a vaillant training course where they will tell you that the sl goes to 4, 3 and 5 are optional connections if you choose to use them. I used to do warranty work for vaillant and every single boiler was wired this way. your making yourself look incredibly foolish.
I have no idea what your on about
It will work fine. Here I'll even explain it for you.
Vaillant boiler needs LNE to operate for HW because its a combi boiler.
When it receives power on no.4 it will operate for heating, no need for 3&5.
Are you with me so far?
Right...when you fit a gravity link in a programmer it will operate for HW only, or HW&Heating. Stay with me here..
So if HW on is connected to terminal 4 then the hw button will always power the boiler on. there's no connection to the MV, get it??
Now, when we press the Heating button, the HW on will also automatically activate, thus operating the boiler from the HW ON and sending power to the MV from CH ON.
There see? simple
If you can't understand that then there's nothing more I can do for you!!
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