Scotsman MAR 78 Service Manual page 13

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Also a weight volume ratio of 2.1 cm. mt. per ton,
must be taken into consideration for correct ice
storage.
a) Non-refrigerated room for short term
storage
The scale ice is produced continuously for 24
Hours per day, whereas the use period is
generally for no longer than 8 hours per day.
Therefore storage facilities should be provided
to accomodate a minimum of 16 hours of
production, this means that every MAR ice
machine must be installed with a properly
insulated storage room which should have a
minimum capacity of 2/3 the daily ice
production.
With a well insulated room and duly subcooled
scale ice, the limited losses of heat through the
walls of a properly designed room with
adequate arrangements, are largely offset,
and excess melting will not occur. In most
situations where whole quantity of ice produced
is being used on a daily basis, it is not necessary
to provide cooling for the ice storage room.
b) Refrigerated room for extended storage
and long distance conveying
When scale ice is to be transported at a
considerable distance, such as aboard fishing
vessels, or in locations with normal ambient
temperatures conditions, or when used in
industrial plants where demand is intermittent,
its subcooling power must be preserved
absolutely in the storage bin by a proper
cooling system keeping air temperature at a
pre-established and constant value. The ideal
ice storage room is the type with mechanically
refrigerated jacket space surrounding the ice
bin.
Good practice calls for an ice storage capacity
of about two times the daily ice machines
production with an inside temperature of -6°C
minimum (20°F).
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