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Theory of Operation
Model 506 (UC Ice Maker)
Model 506 (UC Ice Maker)
3-14
#3752200 - Revision B - May, 2006
WHAT’S IN WATER
C. WATER TESTING
Water testing is necessary to determine the amount of minerals in a water supply that affect ice and the ice maker.
T.D.S.
(Total Dissolved Solids) is the test for the total
concentration of all minerals present in the water.
Chlorides
are tested to determine the degree of cloudy ice and
Alkalinity
scale buildup.
Total Hardness
Small concentrations of minerals do not affect the ice quality or cause excessive scale buildup. However, amounts
which have an adverse effect are:
TEST
CONCENTRATION
EFFECT ON ICE
EFFECT ON ICEMAKER
T.D.S.
50-1000 ppm
Cloudy, Slow Cutting,
Temporary and Permanent
or higher
Refreezing
Scale Buildup
Chlorides
200-300 ppm
Major Cause of Cloudy Ice,
Temporary and Permanent
or higher
Slow Cutting, Refreezing
Scale Buildup
Alkaloids
300-400 ppm
Cloudy, Slow Cutting,
Temporary and Permanent
or higher
Refreezing
Scale Buildup
Total
5-10 GPG*
Clear Ice
Minimal Scale Buildup
Hardness
(100-170 ppm)
10-15 GPG
Slightly Cloudy
Moderate Scale Buildup
(170-255 ppm)
15-20 GPG
Noticeably Cloudy, Possible
Serious Scale Buildup
(255-340 ppm)
Slow Cutting and Refreezing
20 GPG and Up
Severely Cloudy
Excessive Scale Buildup
(340 ppm and Up)
Slow Cutting, Refreezing
* Grains per Gallon
NOTE:
Water treatment companies usually have the equipment to test water. Most city water departments can sup-
ply information concerning the mineral content in water.
