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New Member
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Dec 4, 2009, 10:07 AM
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Required circuit breaker size for 240 volt dayton 3UG73 electric heaters
What size breaker should be used for a dayton 3UG73 electric heater , wired for 240 volts
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New Member
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Dec 4, 2009, 10:22 AM
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Yes my mistake , I forgot to include that it will be setup for 17,100 BTU (sorry)
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New Member
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Dec 4, 2009, 10:24 AM
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It indisate in the owner manual maximum fuse (breaker) size 30 amp
I was wondering if this could use a 2 pole 20 amp or should I use the 30 amp 2 pole?
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Heating & Air Conditioning Expert
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Dec 4, 2009, 10:32 AM
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If the manual indicated a 30 amp for that heat selection then you use a 30 amp breaker. Real simple.
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New Member
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Dec 4, 2009, 10:34 AM
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Thank you , I was just confused since it stated Maximum fuse size, I thoguht that possibly a 2 pole 20 would work as well ,
Forgive my lack of knowledge.
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Heating & Air Conditioning Expert
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Dec 4, 2009, 10:42 AM
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I did not say a 20 might not work but the use of a smaller breaker might cause it to trip. Make sure you use a minimum of # 10 wire for a short distance or #8 for longer distance. This should also be mentiuoned in your instructions. I have a smilar unit in the big garage and it is great to have heat for working on projects or cars. Good luck with your install.
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New Member
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Dec 4, 2009, 10:46 AM
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I understand and thanks very much , in the owner manual it shows 17,100btu and the heater amps 20.9 so I think I will use the 30 amp 2 pole since 20.9 is greater than 20.
As I understand it , the unit will draw 20.9 so The 30 amp is the best option, after all it will only draw what it needs.
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Heating & Air Conditioning Expert
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Dec 4, 2009, 10:48 AM
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Yep and that 30 will trip on a short so you are covered. Now a 25 will also work but not necessary if wired as per the directions.
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New Member
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Dec 4, 2009, 10:57 AM
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Yes , I saw that but I thought that was for 208 volts and would deliver only 12.799 btu's
I would prefer to not change any jumpers in the unit.
And again I love this site , I always get great help from you guys.
Thanks again
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Heating & Air Conditioning Expert
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Dec 4, 2009, 11:42 AM
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No problem. Enjoy the heat.
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New Member
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Nov 26, 2012, 08:02 AM
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I have a dayton heater did not get a manual, not for sure what it is wired for
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