Chapter 1 Safety
UD-series Screw Compressors
1.4 Safety Devices
1-9
1.4
Safety Devices
For safe use and protection of the compressor, make sure to foresee and install 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.
Please inspect the operation of all safety protection devices before starting the
compressor. If any kind of malfunction and/or wrong operation is detected,
immediately take measures to resolve the hazardous situation. Operating the
compressor with faulty safety devices can lead to dangerous situations for personnel
and environment.
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 activated before commissioning as well as periodically. For
details about the inspection procedure and inspection cycle of the emergency stop buttons, please
consult 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
Please consult the unit instruction manual for inspection procedures.
