Rewiring Wireless Receiver from an UP2 programmer
Hello!
I only have five wires from the old U2 programmer, live, neutral and earth which I'm ok with. The hot water has two black wire (terminals 3 & 4), but does it matter which wire go into the HW NC or the HW No on the Tado. Thanks in advance
Answers
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The UP2 is a rebadged Drayton LP822. Logically therefore, in moving the wires, assuming you are operating your boiler in Dumb on-off switched mode - not digital mode (please confirm):
L goes L, bridged to COM on the wireless receiver - assuming this is a V3+ receiver.
N goes to N
Pin 3 goes to HW NO
Pin 4 goes to CH NO.
Have studied the photo and cannot see two wires connected to PIN 3, or PIN 4. Have I missed something?
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Thank you, there are no more wires there, just as the photo is.
Not to sure about:-
' you are operating your boiler in Dumb on-off switched mode - not digital mode (please confirm)'
Just want to install the V3= receiver
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Boilers which are capable of being controlled in digital mode - a concept called Opentherm, or EMS, work more efficiently than boilers which can only be instructed to operate at full tilt (ie they arent fed information about the heating curved needed - they just pump it out as hard as they can.
About 1/5 of the users who attend here have boilers which can operate in digital mode and were unaware. Would you share your complete boiler model? Might be a chance….
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