Great to see your reply! Clicking this link will put you in the picture: site:
http://homedistiller.org/forum running a reflux
Basically, start with the valve closed and the coolant running. Fire it up hot and fast until the boiler pushes vapors up the column and it reads 77*C on the thermometer at the top of the column.
Watch out, the thermometer does nothing for a long time and then suddenly starts to race up. At 77*c turn the heat nice and low, let it reflux for 30 or 40 mins at low heat. The vapor temp should settle to a steady 78.1*C +or-at the top.
Open the take-off valve(small tap) to 2 drips per second. Throw the first 150ml into a meths container. The next few jars will be heads and no good to drink. They will be hot and burning to taste.
The temp will automatically climb to 78.2*C +or- . The good stuff is coming through. Open the tap to about 4 drips/sec, and increase the heat a little. There must always be more liquids running back down the column than what youre letting drip out, so more drips means more heat to keep that surplus overflowing into the reflux.
Keep collecting the good stuff until the temp climbs to 78.3 or 4*C. You can keep the temp below 78.4* by going back to 3 or 2 drips/sec by closing the valve a little.
As soon as you can smell a skanky smell in your take-off it's done. Don't let any of that skank get into your good stuff.
Put a new jar under the take-off and collect the tails for future re-running. Here you can open the tap full(no reflux) and turn up the heat. The temp will climb rapidly into the 90's, I would quit when it hits 98*c.
The heads and tails can be run again and more good stuff can be got out of them.
