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Model 506 (UC Ice Maker)
Model 506 (UC Ice Maker)
Theory of Operation
3-5
#3752200 - Revision B - May, 2006
Water System
The water system provides fresh water necessary for
ice production, recycling this water as ice is produced.
The water system also flushes away rejected minerals
and contaminants, circulates cleaning solution during
the CLEAN CYCLE, and provides a means of drainage.
The hardness of water supplied to the ice maker will not
only affect the quality of the ice produced, but may also
affect the operation of the water system.
A water softener or polyphosphate feeder will not cure
all problems associated with hard water, but they can
be used to reduce scale build-up in the ice maker.
NOTE:
Some polyphosphate feeders will cause a slime
build-up in the water system when the water supply has
a low mineral content.
Ice Making Cycle
In the water system,
the water pump
moves the water from the reservoir pan up to the dis-
tributor, where it flows out over the evaporator freezing
plate.
Water that does not freeze on the evaporator freezing
plate runs off the front edge and falls back into the
reservoir, where it is recycled back to the distributor.
As the ice slab forms, the minerals in the water are on
the surface of the ice. The water flowing over the top of
the ice slab washes these minerals back into the water
reservoir pan. The water continues to recycle until the
ice slab reaches the desired thickness.
Distributor
Evaporator
Freezing Plate
Water Pump
Outlet Tube
Water Pump
Drain
Standpipe
To Bin Drain
From Water
Supply
Water Inlet
Tube
Water Inlet
Valve
Reservoir
Pan
Bin
Cutting Grid
Figure 3-4. Water System
Figure 3-6. Water Flow Diagram
Figure 3-5. Water Flow on Evaporator
