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ICE MAKER FOR TOP MOUNT MODELS
The automatic Ice Maker is mounted in the freezer
compartment. It is attached to the freezer compartment's
left wall with two screws and can be removed for
servicing.
The Ice Maker is designed to produce ice automatically.
The length of time between Harvest Cycles will vary,
depending on load conditions, door openings, ambient
temperature and freezer temperature. These factors
must be taken into consideration when checking the ice
production rate.
With a temperature of -2°F to +5°F in the freezer, the
rate of harvest will be 8 - 12 cycles per 24 hour period.
The Ice Maker is wired across the line and will harvest
ice in the refrigeration or defrost cycles.
The Water Valve and Solenoid Assembly are both
mounted in the compressor compartment.
A
" polyethylene tube extends from the water valve
3/16
up the rear wall of the refrigerator to a water inlet spout
that directs the water into the fill trough. A bead of sealer
around the inlet water tube prevents the migration of air
and moisture into the freezer compartment.
Front Cover
A decorative front cover, made of molded plastic,
encloses the operating mechanism of the Ice Maker,
protecting it from moisture. It is essential that the cover
be in place on an operating Ice Maker to protect against
possible contact with the mechanism by the user. (See
Figure F1)
Figure F1
SECTION F - ICE MAKER
53
ICE MAKER COMPONENTS
Ice Mold
The Ice Mold is die-cast aluminum with the Ice Maker
Thermostat bonded to its front surface. The Mold has a
semi-circular interior partitioned into equal size
compartments. Water enters at the rear of the Mold,
through a fill trough. A film of silicon grease on the top
edge of the Mold prevents siphoning of water by capillary
action.
Mold Heater
A Mold Heater, rated at 115volts, 81 ohms ± 10% or 230
volts, 340 ohms ± 10%, and covered with an aluminum
sheath, is embedded in the grooved section on the
underside of the Mold. When the Mold Heater is
energized, the ice contact surface within the Mold is
heated enough to allow harvest of the ice pieces.
The Mold Heater is wired in series with the Ice Maker
Thermostat, which acts as a safety device.
The original heater is staked in place, but can be
removed for replacement. The replacement heater is
secured to the Mold by four flat head retaining screws
that thread into holes in the Mold, adjacent to the heater.
A thermal mastic sealer is placed between the heater
and the Mold to ensure good thermal contact.
Ice Stripper
An Ice Stripper is attached to the Mold to prevent ice
pieces from falling back into the Mold. It also serves as
a decorative side cover.
Ice Ejector
The Ejector blades are molded from Delrin, and extend
from a central shaft, which turns in nylon bearings at the
front and rear. Each blade sweeps an ice section out of
the Mold. The drive end of the Ice Ejector is "D" shaped.
Silicone grease is used to lubricate the bearing surfaces.
Water Valve Assembly
The Water Valve is solenoid operated and when energized,
releases water from the supply line into the Ice Mold. The
amount of water released is directly proportional to the
length of time the Water Valve Switch is energized. A
flow washer, inside the Water Valve, maintains a constant
rate of water flow over a supply line pressing ranging from
15 to 100 psig. It will not compensate for pressures below
15 psig, or greater than 100 psig. A No. 80-mesh screen,
placed ahead of the flow washer, filters out foreign
materials.
The solenoid coil draws 10 to 115 watts of power. The coil
is wired in series with the Mold Heater, across the supply
voltage.
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