Danger: A qualified electrician should install high voltage equipment. Please ensure that you comply with local electrical codes and regulations. Improper installation can lead to device failure and even cause a fire. Damage to thermostat due to improper installation is not covered under warranty.

Those little multi-coloured caps that come in the box with Mysa are called Wire Nuts. You should never re-use the wire nuts from your old thermostat. You use them to connect two or more wires; However, you can’t simply toss them on top of already twisted wires - there’s a safe and correct way to do it!


To connect the wires:

  • Start by holding the two wires together so that the copper ends are parallel.
  • Together, slip them into the Wire Nut.
  • Now, turn the Wire Nut clockwise until it feels secure.
  • Give the wires a gentle tug. If you detect any movement or slippage what so ever, untwist and start the process over.

Tip: If you have pliers, great! You can use them to pre-twist the wires before inserting them into the Wire Nut or straighten bent or curved wires.

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