Service; Ice Machine Operation (All Models) - Follett M25578 Operation And Service Manual

Service

Ice machine operation (all models)

Follett's ice machine consists of five distinct functional systems covered in detail as follows:
§ Water system
§ Electrical control system
§ Mechanical assembly
§ Refrigeration system
§ Bin full
The Horizon ice machine overview
The Follett Horizon ice machine uses a horizontal, cylindrical evaporator to freeze water on its inner surface.
The refrigeration cycle is continuous; there is no batch cycle. The evaporator is flooded with water and the level
is controlled by sensors in a reservoir. A rotating auger (14 RPM) continuously scrapes ice from the inner wall
of the evaporator. The auger moves harvested ice through the evaporator into an ice extrusion canal. The ice
is forced through a restrictive nozzle that squeezes out the water and creates the Chewblet. The continuous
extrusion process pushes the Chewblets through a transport tube into a dispenser or bin.
A solid state PC board controls and monitors the functionality of the ice machine. In addition to sequencing
electrical components, the board monitors various operational parameters. A full complement of indicator
lights allows visual status of the machine's operation. Additionally, the PC board controls the self-flushing
feature of the ice machine. The evaporator water is periodically drained and replenished to remove minerals
and sediment.
A unique "bin full" detection system is incorporated in the Horizon ice machine. A switch located at the ice
discharge port of the machine detects the position of the transport tube. When the bin fills up with ice, the
transport tube moves out of the normal running position, and the switch turns the ice maker off. A domed
housing at the end of the transport tube contains the ice extrusion loads during shut down.
Harvest system diagram
HC_1810R/N, HC_2110R/N, HM_1810R/N, HM_2110R/N
Ice Transport Tube
Compression
Nozzle
Water Inlet
Auger
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