Scotsman Flaked Ice Machines - Manual (Page 17)

Evaporator Inspection
The evaporator's inner wall has 12
shallow vertical grooves machined into
the stainless steel surface. These
grooves provide direction for the ice as
it is pushed up the evaporator by the
auger. If the grooves are damaged or
there are radial marks on the inside of
the evaporator, it should be replaced.
The stainless steel evaporator cannot
be honed, as honing leaves radial
marks that cannot be sanded out.
Most scale will be removed by ice
machine cleaner during the de-scale
process. Stubborn scale deposits on
the evaporator surface can be sanded,
but the sanding motion must be
vertical.
Page 16
Sanding the Evaporator
Example of Scale Build Up on Evaporator Wall