Operation Manual P750/P1500/P3000
Cold Jet, LLC Page 12
• Facilities with large and/or multiple tanks (i.e. 220 tons) may only have over-pressure
safety valves. In these situations, there are several factors to consider:
o Length and diameter of supply line.
o Type and quality of insulation on the supply line.
o Number of machines drawing liquid from the supply line.
o Is a liquid loop system being used?
NOTE: Large ice production facilities are generally considered on an individual basis.
Operating Modes
Purge
When starting the unit from main power off, it will enter a “purge cycle” using high-pressure
vapor only to dry out the extrusion cylinder and the exhaust screens before allowing the CO
2
liquid to enter this area. This is done for ten strokes on each cylinder.
Chill down
The next phase is the chill down for up to twenty strokes on each cylinder. Liquid CO
2
is
introduced to the cylinder through the bottom electric solenoid valve only. This phase may be
shortened if the hydraulic pressure switch senses extrusion pressure as required to push the
ice through the die.
Production
The unit will automatically shift into full production and the top ball valve assembly actuates to
provide a higher liquid flow rate.
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