Remotec ZFM-80 - Fireplace Project

Hi Everyone,

My fireplace has an external switch (2 x 18 gauge wires)… I want to install the remotec next to the wall switch. I understand that the F terminals (L & N) are for the 120V power and the D terminals are to be connected to the existing switch. But I have some questions:

  1. Should I be using 18 or 14 gauge wire for the E terminals (Relay Load)?
  2. Where should the 2 wires from the E terminals be connected to? the D terminals? or F terminals?

If anyone has a wiring pic with this kind of set up, that will be great also.

Thanks in advance.