2205B0JE-DA-J-N_2014.05. 
 1 Safety 
Screw Compressor J-series  1.4 Safety Devices 
1-10 
1.4 Safety Devices 
For safe use and protection of the compressor, make sure to attach safety devices to the compressor 
that comply with the regulations and the following descriptions. 
Safety devices must be properly and periodically maintained and inspected. It is important to include 
maintenance and inspection of safety devices in the periodical maintenance/inspection schedule. Make 
sure to provide users of the compressor with necessary information on types, attachment positions, 
functions, inspection method of the safety devices. 
 
 
  Check the safety devices after turning on the power and before operation of the 
compressor. If they do not operate normally, immediately take measures to 
replace them. 
1.4.1  Emergency Stop Button 
 Overview/Function/Purpose 
The emergency stop buttons are used to stop the compressor operation immediately if an 
emergency occurs to the compressor. 
 Installation Locations 
The emergency stop buttons should be installed in the controller on the compressor and in the 
operating control room 
 Stop/Reset Methods 
To activate and reset the emergency stop buttons, refer to the unit instruction manual. 
 Inspection Method/Cycle 
The emergency stop buttons must be tested before a test run as well as periodically. For details 
about the inspection procedure and inspection cycle of the emergency stop buttons, refer to the 
unit instruction manual. 
 
1.4.2  Breakers for the Main Motor Power and Control Power 
(with Lockout/Tagout Devices) 
 Overview/Function/Purpose 
Turn off the main motor and control power, and if there are any possibilities of danger during work 
(especially during cleaning, maintenance, inspection, or troubleshooting), lockout/tagout devices 
must be set up for breakers of the main motor and control powers to prevent injury to workers in 
case the power is turned on accidentally during work. 
  Methods of Performing and Releasing Lockout/Tagout 
In accordance with the regulations created by Occupational Safety & Health Administration 
(OSHA) and other authorities, make sure to clearly indicate methods of performing and releasing 
lockout/tagout and provide users of this compressor with the necessary information. 
 Inspection Method/Cycle 
For inspection procedures and the inspection cycle of the lockout/tagout devices, refer to the unit 
instruction manual.