Fulton Electric (FB-W) Hot Water Boiler - Manual (Page 14)

© The Fulton Companies 2014
INSTALLATION
FBW-IOM-2014-0311
SECTION 2
2-8
 Electric Elements
Electric elements will have an increase in watt density if the
applied voltage is higher than the element design voltage.
Therefore, electric elements have a 0% tolerance for operation
over design voltage. Electric elements can tolerate a lower
than design voltage but the kW must be derated accordingly.