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How to change Danfoss RX1 5 core to Honeywell Home T3R

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21 Sep 2025
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Hello, can anyone help and show me how to wire the 5 wires from my old Danfoss RX1 to the replacement Honeywell Home T3R
Much appreciated ....Andy
 

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The connections for the Honeywell are shown in your photo, and the connections for the Danfoss are usually on the back of it. I think yours will be as below. If it is the same....

upload_2019-11-9_20-13-41.png


....the wires are moved from the Danfoss terminals to the Honeywell terminals that have the same function, like for like.

DF N = HW N
DF L = HW L (Both HW L's are connected together internally so are effectively are the same terminal)
DF 2 = HW A
DF 3 = HW B

Not sure why there is a wire in DF terminal 4, that isn't normally used, but the equivalent terminals are
DF 4 = HW C
 

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