Scotsman CU50 - Manual (Page 6)

Water Quality
All water, including potable water supplied by
municipalities, contains some impurities or
minerals. Water absorbs impurities from the air as
rain and/or as it flows through the ground. Some of
the impurities are solid particles, these are known
as suspended solids, and a fine particle filter will
remove them. Other impurities are chemically
bonded to the water molecules, and cannot be
filtered out, these are called dissolved solids.
Ice made by this machine will have a lower mineral
content than the water it was made from. This is
due to the method of making ice, as water with few
or no mineral content will freeze first in the ice
making molds. The reason for this is that the
minerals dissolved in water lowers the water’s
freezing temperature so the purer water freezes
first. This concentrates most of the impurities in the
ice machine water reservoir where they may form
hard deposits known as scale. The machine
automatically dilutes the concentration of minerals
by over-filling the reservoir during the harvest cycle
(with the excess water flowing down the drain).
Between 2 and 4 pints of water flow into the unit
each cycle. Between 1 and 3.5 pints of that rinses
the reservoir and goes down the drain.
Some impurities will inevitably remain, and will stick
to the parts in the machine, and will cause
malformed ice cubes. Eventually, built up mineral
scale can shorten machine life.
To keep the machine operating properly, these
impurities or minerals will have to be regularly
dissolved by an acid cleaning, using Scotsman Ice
Machine Scale Remover. Directions for this may be
found in the section under cleaning.
Filters and Treatment
In general, it is always a good idea to filter the
water. A water filter, if it is of the proper type, can
remove taste and odors as well as particles. Some
methods of water treatment for dissolved solids
include reverse osmosis and polyphosphate
feeders.
RO Water
This machine can be supplied with Reverse
Osmosis water, but the water conductivity must be
no less than 10 microSiemens/cm.
A reverse
osmosis system should include post treatment to
satisfy the R.O. water’s potential aggressiveness.
Deionized water is not recommended.
Because water softeners exchange one mineral for
another, softened water may not improve water
conditions when used with ice machines. Where
water is very hard, softened water could result in
white, mushy cubes that stick together.
If in doubt about the water, contact a local point of
use water specialist for recommendations on water
treatment.
Installation Overview
The ice machine must:
•
be connected to cold, potable water
•
be connected to a drain
•
be connected to the proper power supply
•
be able circulate air through the vents at the
front.
Note: Do not build in so that the door is recessed.
March 2010
Page 5
CU50
Installation and User's Manual