3-1
Section 3
Ice Machine Operation
Ice Machine Operation
Ice Making Sequence of Operation
Important
Prior to start up of this machine, a thorough
cleaning and sanitization should be performed.
Follow instructions in the maintenance section of
this manual.
Initial Start-Up
1. Water Inlet
Turn the toggle switch to wash/fill,the water fill valve and pump
are energized, wait for 90 seconds, then turn the switch to off
position.The water inlet valve on this machine energizes in the
harvest cycle, therefore priming the system with water will allow
the system to start up next cycle with a full reservoir of water.
2. Freeze Cycle
Turn the on/off/wash switch to on. The compressor, and water
pump will start, thus starting the freezing cycle. The pump sprays
water into the inverted cups. The water freezes layer by layer,
until an ice cube forms in each cup.
At the same time the compressor starts, the condenser fan motor
(air-cooled models) is supplied with power throughout the freeze
and harvest cycles. The freeze cycle continues and the evaporator
thermostat reaches the adjusted set point.
•
EC18/20
A harvest cycle starts.
•
EC30/40/50/65/80
The thermostat energizes the time delay relay. When the timer
reaches setpoint (10 minutes factory setting) the harvest cycle is
initiated.
3. Harvest Cycle
The compressor continues to operate and the water pump is de-
energized. The hot gas valve energizes, allowing hot gas to enter
and warm the evaporator.. The water valve is also energized,
aiding with harvest, as well as filling up the sump with fresh
water for a new freeze cycle.
The ice falls from the cups and is directed into the bin by the ice
chute. The harvest cycle continues until:
•
EC18/20
The evaporator thermostat changes position.
•
EC30/40/50/65/80
The timer reaches the factory setting of 3 minutes.
The hot gas valve, and water valve de-energize. If ice cubes are
not contacting the bin thermostat a new freeze cycle is initiated
as the water pump energizes and sprays water into the cups,.
4. Automatic Shut-Off
When the storage bin is full, the ice will come in contact with the
bin thermostat which is located inside the bin. The machine will
stop after approximately one minute of continuous ice contact
with the bin thermostat probe.
The ice machine remains off until enough ice has been removed
from the storage bin to allow the ice to fall clear of the bin
thermostat probe. As the ice clears the probe, the bin thermostat
warms up and the machine starts another freeze cycle.
