A] Evaporator (Casing) - Hoshizaki FM-170,300AKE(-N) Service Manual

[a] EVAPORATOR (CASING)

The evaporator consists of a stainless steel icemaking cylinder coiled with a refrigeration
pipe and wrapped together with a polyurethane foam insulation material. Water coming from
the inlet into the evaporator will be frozen into ice. The ice spout is located on top of the
evaporator.
[b] AUGER
The stainless steel auger is supported by the upper and lower bearings of the evaporator
and slowly rotated by the gear motor, while scraping off the ice forming on the inner wall of
the cylinder and pushing up to the ice spout.
[c] EXTRUDING HEAD (BEARING)
The stainless steel extruding head is provided with a press-fit plastic bearing inside and fixed
on top of the evaporator. The extruding head functions as the auger bearing and
compresses the sherbet ice carried up by the auger into a column shape with the path
resistance.
[d] HOUSING
The cast bronze housing is provided with a press-fit plastic bearing inside and fixed on the
bottom of the evaporator for connection with the gear motor.
[e] MECHANICAL SEAL
The mechanical seal on the lower auger bearing prevents icemaking water leaks into the
evaporator. The mating surfaces are made of ceramic and carbon.
[f] COUPLING (SPLINE JOINT)
The auger bottom and gear motor output shaft are splined and connected with the spline
joint.
[g] GEAR MOTOR
The gear motor consists of a 200W 1 phase 240V or 80W 1 phase 220 - 240 / 220V drive
motor integrated with a decelerator and provided with a built-in auto-reset thermal protector.
When the thermal protector trips, the controller board will stop the gear motor. The thermal
protector trips when the gear motor mechanism is overloaded or when excessively high or
low voltage is applied on the gear motor. The electrical capacity must be increased if a large
current flows through the surrounding equipment.
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