I also remember reading somewhere in this long thread that someone, maybe it is JohnO, connects the mypin differently with the relay controlling return rather than live...? Or something like that?
Okay Alfred, I will give my way of wiring with a picture of the switch I use.
We assume a 18AWG three prong 110VAC connecting cable.
Green goes to the frame with a jumper from the frame ring terminal to the neutral (gold color) terminal on the GSW-42 switch
Black goes to #10 on the ITC-106 with a jumper to the #1 connection (Line) on the GSW-42
White goes to #9 on the ITC-106 with a short bridge (jumper) to #8
One connection from the heat element goes to #7 on the ITC-106
The second lead from the heat element goes to the center pin (Load) on the GSW-42
The red lead from the temperature sensor goes to #3 on the ITC-106
The brown/yellowish lead from the temp. sensor goes to #4 on the ITC-106
BTW: if your heat display goes down when heating rather then up, switch the sensor leads on #3 & #4.
With this setup, the PID has always power when plugged-in and the bowl should heat when the the PID calls for heat. The LED in the GSW-42 will be on when the switch is turned-on
and a good ground is present. If not, the unit should not be used because it is not grounded. I have seen problems with small power units & inverters on this.
Hope this helps. I will try to set a wiring diagram in here too when I get to it.
JoergK.