To wgrochowski -- It appears there IS a problem with the 3UG73D heater thermostat connection. Dayton gave you a hushup replacement. I installed 2 of these in my work shop about 3 years ago. One stopped working a year ago and I did nothing about it because the other one turned out to be sufficient. The second did the same thing about two weeks ago. I went online and found other customers having the same problem. The most recent had one wire to the thermostat slightly charred and burned off. The first one, however, from a year ago had the wire seriously burned and fire inside has charred the metal above the thermostat.
220 - 240 volt, 60 hertz, properly grounded circuit with 40 amp breaker or fuse protection with #8 gauge wire. For Electric Heaters.
#8 AWG wire with 40amp breaker is not need as long as the run from the panel to the heater is 100 feet or less. #10/2 on a 30amp would be appropriate.
http://www.heater-home.com/manuals/3UG73... according to page 5 #10 gauge unless otherwise stated by local codes. Sorry our code specifies #8
My problem is not how I wired it. The manufacturer's wire coming off the top of the thermostat is overheating to the brink of a fire. The good news is that Dayton contacted a local grainger dealer and agreed to analyze my unit and replace it with a new one for free. I am concerned there is a defect with my particular unit as it is only 1 year old.
Thanks for your help.
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