Section 3 Operation
Part Number 000007924 5/14 37
Operational Checks
GENERAL
Manitowoc ice machines are factory-operated and
adjusted before shipment. Normally, new installations do
not require any adjustment.
To ensure proper operation, always follow the
Operational Checks:
• when starting the ice machine for the first time
• after a prolonged out of service period
• after cleaning and sanitizing
NOTE: Routine adjustments and maintenance
procedures are not covered by the warranty.
ICE THICKNESS CHECK
After a harvest cycle, inspect the ice cubes in the ice
storage bin. The ice thickness probe is factory-set to
maintain the ice bridge thickness at 1/8" (3 mm).
NOTE: Make sure the water curtain is in place when
performing this check. It prevents water from splashing
out of the water trough.
1. Inspect the bridge connecting the cubes. It should
be about 1/8" (3 mm) thick.
2. If adjustment is necessary, turn the ice thickness
probe adjustment screw clockwise to increase
bridge thickness, counterclockwise to decrease
bridge thickness. Set at 9/32" (7 mm) gap between
ice thickness probe and evaporator as starting point,
then adjust to achieve a 1/8" (3 mm) bridge
thickness.
NOTE: Turning the adjustment 1/3 of a turn will change
the ice thickness about 1/16" (1.5 mm).
NOTE: During shipping and installation the ice thickness
probe may shift, requiring further adjustment to achieve
the rated energy efficiency and production. The ice
weight per cycle must be within the minimum and
maximum for your ice machine series. Capture and
weigh the ice from the second freeze/harvest cycle. The
target weight is the middle of the minimum and
maximum weight in the chart below.
Ice Thickness Check
3. Make sure the ice thickness probe wire doesn’t
restrict movement of the probe.
Series
Ice Machine
Ice Weight From One Cycle
Minimum Ice
Weight
Maximum Ice
Weight
I0680 - IB690 4.6 lbs 5.2 lbs
I0876 - IB896 5.75 lbs 6.5 lbs
I0976 6.2 lbs 7.2 lbs
I1076 6.2 lbs 7.2 lbs
IB1096 7.5 lbs 8.5 lbs
I1470 12.0 lbs 14.0 lbs
I1870 15.5 lbs 16.75 lbs
I2176 15.5 lbs 16.75 lbs
Target weight is the middle of the minimum and maximum weight.
ADJUSTING SCREW
1/8" (3 mm)
ICE BRIDGE THICKNESS
PLACE DRILL BIT HERE
BETWEEN PROBE AND
EVAPORATOR TO SET
INITIAL GAP
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