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Since when?The 3 core and earth is the harmonized colours.
PS Pretty pic!
1st April 2004.
http://www.tlc-direct.co.uk/Technical/DataSheets/Cable/CableColoursLeaflet.pdf
Since when?The 3 core and earth is the harmonized colours.
PS Pretty pic!
No! Read what I said:
However, I would swap the stat terminals (not the wires). So C and 6 are connected (Brown) and 1 and 8 are connected (blue/red). It's illogical the way that Honeywell draw it.
In other words leave the wires connected to the terminal strip exactly as in your first pic. Just swap them at the stat end.
Strange colour combination!Looking at my existing wiring, the boiler connection to the junction box is 3 core and earth (Brown,Grey,Black and Earth).
Yes.I was just re reading this post and realised I had not read this properly.
Hopefully this is now what you mean?
View media item 30729
Yes. The live is a permanent connection, i.e it is live even when the boiler is not working. Switched live is as it says: it turns the boiler on.My boiler has a Switched Live as well as a normal live connection.
Live
Sw Live
Neutral
Earth.
Referencing my previous drawings, is the Live and the Switched Live wired the same for the S Plan plus?
If the cable colour is not red or brown, the red tape is just to indicate that it is "live" conductor, i.e not a neutral or earth.On my existing setup the Boiler live is connected to the main live in (Terminal 1) but has a Red tape marker on it (as in a Sw live)
That's correct. It should be HW stat terminal 1 (call) and 3-port valve Orange.the Switched Live is connected to Terminal 8 along with the HW cylinder stat, the pump and the 3 port valve.
If it works, don't change it. Any half-decent electrician (who understands heating controls ) or heating engineer will be able to work out which wire does what.At the boiler end the wiring is as follows:
Black - Permanent Live
Brown - Switched Live
Grey - Neutral
Green/Yellow - Earth.
Its a bit confusing at the moment.
The system works, but is this wired correctly?
By the standard convention I realise that the Brown of the harmonised cable should be the Permanent live and the Black with the Red marker should be the Switched live, so should I ensure these are correct when the wiring is redone?
I assume you are talking about the existing system , ie the 3-port valve.From what I can see from the wiring and the drawings, the orange wire which becomes live when the valve motors to its closed position is also connected to the HW cylinder stat and the Pump. This wire (Terminal which has become live then completes the circuit to the pump which starts the pump running and also supplies a live to the HW stat but this is kept open until the HW contact is made via pin 6 which is connected to the programmer HW output.
That's OK, but I'm not sure why you show the boiler wire as orange and valve wires as white.
That's OK, but I'm not sure why you show the boiler wire as orange and valve wires as white.
It might help if you read How a mid-position valve works.
The black lines are power in. The yellow lines represent the programmer and two thermostats. The CH side of the programmer is not shown as it is not important to the way the valve works. If the yellow line connects two black lines it means the switch or thermostat is closed, allowing current to pass.Can you please tell me what are the black lines with Yellow on them?
I wondered why you suddenly went from talking about two-port valves to three port.I see where I have made a mistake. I have just looked at the 2 port valves I have here and they do not have a White wire at all. Only Green/Yellow,
Grey,
Blue,
Orange,
Brown.
That's explains why the drawing I have made is wrong.
The black lines are power in. The yellow lines represent the programmer and two thermostats. The CH side of the programmer is not shown as it is not important to the way the valve works. If the yellow line connects two black lines it means the switch or thermostat is closed, allowing current to pass.Can you please tell me what are the black lines with Yellow on them?
To use the "HW only" drawing as an example. When calling for heat both the HW prog ON switch and the HW stat Call will be closed. The CH stat and/or prog switch will be OFF.
In the case of "CH only", the CH stat Call is closed (and prog CH ON) while the HW OFF and/or the HW stat Sat, must be closed (either of these can put volts onto the grey wire).
I know the diagrams are untidy, but all I have is MS paint and Word drawing. If you can produce better ones, I will certainly make use of them.
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