I want to wire in a thermostat and I am having a hard time understanding the wiring diagram.
I think I get that 5 is L and can be connected to your heater (3) or cooling (4). So pins 3, 4, and 5 are just a single-pole double-throw switch? I would be able to connect 24 V to pin 5 and probe pins 3 and 4 to determine if the thermostat was above/below the set point, or does the switch need power and is that incorrect?
Maybe instead pin 5 needs to be 120 VAC or 240 VAC depending on location, and then what would 1 and 2 be?
I'm missing something – any help would be greatly appreciated!
Best Answer
The phase (or positive if DC) is applied on 5.
Depending on the voltage the neutral (or negative if DC) is applied on 1,2,6 or 7 (2 for 24V) you apply on only the relevant one. The voltage depends on your heater or cooler.
3 and 4 are outputs will be internally connected to the phase depending on the temperature. you connect the heater to 3 or the cooler to 4.