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Hello, I'm looking to replace my Horstmann HRT2 with a programmable such as a Horstmann HRt4-B or Danfoss RET-M but I'm a little confused with the current wiring. The HRT2 datasheet shows: 1 - L (Line) 2 Do Not Use 3 Load Heat 4 N The current wiring : 1 Brown (multimeter shows 230...