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Post by rocketmanbkk on Sept 10, 2017 14:20:37 GMT
So I'm not great with heating stuff.
The new boiler that went in last week had 2 x2 port valves. I take it this is a s plan set up?
A 3 port would be a Y plan set up ( my mums got a 3 port).
So on the 2 port set up do you always have 2 x 2 ports? Are they basically open or closed? One on the heating side & the other on the hot water side?
It's all a bit confusing at the mo but I'm trying to read around what I do so it sinks in
Any comments as always is appreciated.
I'm sure I'm over thinking it!
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Post by tomplum on Sept 10, 2017 14:41:44 GMT
a 'S' plan has 2 2 port valves, both are closed and the wiring goes through them, So when you switch the programmer to fire the heating or the water or both,
the programmer tell the valves to open, when the valve opens it hits a relay in the valve/s which fires the boiler and runs the pump
on a 'Y' plan the 3 port valve port for water is always open so the programer tells the boiler and pump to go,
thats why a 'S' plan always needs a by pass because if the valve sticks the water can't pump anywhere, on the Y plan it can pump through the water port,
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Post by rocketmanbkk on Sept 10, 2017 14:44:19 GMT
Cheers Tom
I'm getting it. Once I work on more systems I'll be a demon
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Post by tomplum on Sept 10, 2017 14:47:39 GMT
thats the best way Rocket, let the spark worry about the wiring for now, Its just enough to know how to plumb it in for now,  |
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Post by rocketmanbkk on Sept 10, 2017 15:02:47 GMT
thats the best way Rocket, let the spark worry about the wiring for now, Its just enough to know how to plumb it in for now, Agreed. The wiring another skill to learn |
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Post by Plumberboy on Sept 10, 2017 15:36:22 GMT
S plans are good because you can keep adding as many zones as you like and they are a full bore valve as the Y plan is slightly restricted.
The wiring side rocky I would say master the S plan first and then tackle the Y plan as it is more complicated to understand.
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Post by rocketmanbkk on Sept 10, 2017 15:37:37 GMT
S plans are good because you can keep adding as many zones as you like and they are a full bore valve as the Y plan is slightly restricted. The wiring side rocky I would say master the S plan first and then tackle the Y plan as it is more complicated to understand. Cheers PB Last weeks wiring was like spaghetti junction. I'll master the set up then the wiring |
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Post by tomplum on Sept 10, 2017 17:09:06 GMT
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Post by Plumberboy on Sept 10, 2017 17:23:08 GMT
They don't include the permanent live though rocky for a modern set up with a pump overrun mate. |
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Post by rocketmanbkk on Sept 10, 2017 17:26:56 GMT
Cheers PB
These are actually quite easy to look at & digest
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Post by rocketmanbkk on Sept 10, 2017 17:29:57 GMT
They don't include the permanent live though rocky for a modern set up with a pump overrun mate. See, that's confusing me. Where's does that go then? |
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Post by rocketmanbkk on Sept 10, 2017 17:30:40 GMT
From those diagrams I could easily wire a system up
In the mi's the diagrams are hard to work out
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Post by tomplum on Sept 10, 2017 17:45:46 GMT
I think PB means a constant live to the boiler Rockey, sothat when the stat knocks off the boiler, it can still give power to the pump, that diagram shows only Live Neutral and earth, you would need a pump live in there as well, |
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Post by Plumberboy on Sept 10, 2017 18:02:06 GMT
I think PB means a constant live to the boiler Rockey, sothat when the stat knocks off the boiler, it can still give power to the pump, that diagram shows only Live Neutral and earth, you would need a pump live in there as well, Cheers Tom that is exactly what I'm referring to.  |
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Post by rocketmanbkk on Sept 10, 2017 19:45:19 GMT
Mmmm... so you mean it needs live from a spur?
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