User’s manual
Version: 5
Page: 14 of 26
Date: 09.11.2022
SAFETY OPERATION
Emergency Stop
All equipment is connected to the general emergency system for the Cold Jet PR120H.
When an emergency-stop device is activated, all components located in the emergency zone will be disconnected from
their power source.
Machine Safety
There are machine safety measures in the following areas:
● Extruder unit
● Extruder plate changer
In these areas, protective covers are in place.
The covers are provided with locking screws to deter removal.
Required performance level PLr = c Implemented in category = Cat3.
There is a danger of congelation/frost bite by touching machine parts cooled down by dry ice.
To prevent congelation the entire machine enclosure is provided with locks that require special tools to open.
Liquid CO2 Leakage
If liquid CO
2
is leaking from any point of the CO
2
pipe system, the CO
2
supply must be stopped immediately. Localize the
leakage and repair.
Stop Production
1. The machine is stopped by pressing the “Start / Stop” button.
NOTE: This will activate the shutdown procedure.
2. The CO
2
valve on the machine inlet will automatically close. It is recommended to close the manual valve on the
mounting kit before leaving the machine unused for a longer period of time.
3. Cut off the main electric supply.
NOTE:
Do not shut off the main switch on the cabinet inside the machine before the inlet CO
2
pressure is ZERO. The CO
2
pressure can be checked on the “Process values” page.
Daily checkup before start-up
1. Check the oil level in the sight glass.
2. Check the pipe system for leaks.
3. Check the operation time since service intervals.
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