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Model 506 (UC Ice Maker)
Model 506 (UC Ice Maker)
Theory of Operation
3-13
#3752200 - Revision B - May, 2006
INGREDIENT
EFFECT
CORRECTION
WHAT’S IN WATER
A. IT AFFECTS ICE QUALITY
Algae or Sulfides
Objectionable Taste and Odor
Carbon Filter
Minerals:
Cloudy Ice
1. Check:
Sodium
Slow Cutting
a. Water flow restriction
Potassium
Refreezing
b. Correct siphoning
Magnesium
2. Polyphosphate feeder or water
Calcium
softener.
3. Change water source.
B. IT AFFECTS ICE MAKER
Iron
Staining
1. Citric acid or liquid ice machine
Chlorine
(Aesthetic only)
cleaner. (Citric acid works best.)
Manganese
2. Water softener AND iron filter.
Permanent
Scale
1. Abrasive cleaning.
Hardness
2. Polyphosphate feeder or water
Calcium or Magnesium
softener reduces or eliminates
Sulfates
abrasive cleaning.
Chlorides
Nitrates
Temporary
Scale
1. Liquid ice machine cleaner.
Hardness
2. Polyphosphate feeder or water
Calcium or Magnesium
softener reduces frequency of
Carbonates
cleaning by 50%.
RECOMMENDATIONS
Water softeners and polyphosphate feeders are not cure-alls, but do reduce (and in some cases, prevent) scale
buildup. They are particularly effective in controlling sulfate scale, which is rocklike and can be removed only
by sanding, scraping or chiseling.
CAUTION:
Some polyphosphate feeders cause slime buildup, so their use in low mineral content water should
be carefully considered.
When the ice slab takes too long to divide into cubes because the water supply has a high mineral content, a special
replacement transformer (Part No. 2165483) is available from your FSP parts distributor. This transformer has a
selectable 11-volt tap that will increase the heat of the cutter grid wires, helping to divide the ice slab into cubes
faster.
Also, a service replacement flow washer (Part No. 588930) for the water inlet valve is available from your FSP parts
distributor. This flow washer will increase the flow of water supply during the HARVEST cycle, helping to wash out
the accumulated minerals in the water reservoir.
