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Topic: Rosto 140v fan dangers? >was Re: +OK, so I was way wrong ... (31 lines)
1) From: Mike McGinness
From: "Ron Ehsani" 
<Snip>
they
<Snip>
fire?
Yes, my two Rostos fans can and do handle 140v at start of roast. I'm doing
it, hence they can handle it. The occasional 1/2# batch I do I have to run
it close to 140v the entire roast which does make me nervous but no problems
so far...
As far as I know electric most motors aren't necessarily designed to work at
only one given speed / voltage but over a range. I have no idea what the
specific peak rating of the Rosto fan motor is. I do suspect the motor will
wear faster running faster... how much faster time will tell. Will it be a
direct correlation to increased batch size meaning wear out occurs at same
total beans roasted in fewer batches? Don't have a clue.
I'd say the chance of fire do to heat caused by running the fan motor at
140v is low. I use boosted fan during cooling and it cools the beans faster.
Hence the fan motor is not generating excess heat else it would take longer
not less time to cool the roast. Is there a *chance* of fire? Always when
dealing with electricity and flammables (like chaff:)
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
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