OK, I have been using this aquarium temp control I purchased from ebay (same one Maheel uses) for a little over a year and it works great to control temperatures in my Fermenting room. I got it off ebay and it comes from China, although the instructions for use are good the wiring instructions are a bit hard to follow. I have had several members pm me about how to set it up so I thought I would put together a tutorial here.
It is important to remember that the unit only requires to open and close a Live supply to control the heating and cooling circuits, in much the same way as a standard single pole light switch at home works. It does not need to open and close both the Live and Neutral to turn the power on or off.
You do not need the capacitor that is in the bottom diagram and I wired mine a bit different since I do not need the fan to cool my fermenting room but it is basically the same. As you can see from the wiring diagram below you need to supply a separate live supply to each relay (6 & 8, I only used 6 as I did not attach a fan) in order for it to output any power to each circuit (terminals 5 & 7). You should also notice that allo Neutral wires are basically joined together so that as soon as a relay closes (turns on the Live power) the Neutrals are able to complete the circuit.
For all those going this route I hope this helps! Bushman
Below are pictures of my setup with each wire numbered to the corresponding terminal. Note on the heater I had to separate the neutral and live wire.
Aquarium Temperature Control
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Aquarium Temperature Control
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