Anyone familiar with J.W. Good kilns and/or know where I might be able to find a manual for one ?
I was just given a J.W. Good - model 18R, with a model LT-4 Kiln Sitter. The person I got it from never used it, and knows nothing about it.
If there's no manuals available - how about a formula for estimating firing temp based on wattage ?
I can't find any markings that indicate max firing temp - only the electrical ratings that state it is 1700 watts at 240v. This seems like a pretty low wattage for a kiln - considering my electric hair dryer is 1500 watts.
I guess I could get an assortment of cones and do an empty test fire - but don't want to damage anything by putting too high a cone on the sitter.
Would you be able to post some photos of the kiln and the sitter? Does it have two sections or three? 1700 is probably the wattage for each section. (Wattage / voltage = amps, by the way; make sure your wiring is up to snuff.)
Don't forget to check if it's a 3-phase or single-phase kiln; it should say 1P or 3P on that metal plate.
Also, if I'm not mistaken, you can't make your kiln fire hotter than what it's made to do. If you set all of your dials (I'm assuming it's a manual kiln, since it's older) to high with a cone pack ranging from 5-10 (you can try 11 or 12, but only if you are super worried about knowing whether it goes over 10; small kiln like that, not likely), put a cone 10 bar or junior cone in the sitter, set the timer for 8-10 hours, and then (after proper cooling time) check it and see what your highest falling cone is.
I think LT-4 is an Orton product and you can still get replacement parts from Skutt (who purchased Orton when they went under).