2 Important Notices on Safety
2-2. Warning cases
- 6 -
2-2. Warning cases
WARNING
Specified
devices
Connect only the combustible gas detector heads provided by RIKEN KEIKI to the alarm system.
Otherwise, the alarm system or equipment connected to it may be damaged.
Power
supply
Before turning on the alarm system, always check that the voltage is properly applied.
Do not use an unstable power supply because it may cause malfunctions.
Need of protective grounding
Do not cut the protective grounding wire inside or outside the alarm system or disconnect the wire
from the grounding terminal.
Defects in protective functions
Check the protective functions, such as protective grounding and fuse, for a defect. If any defect
in protective grounding or other protective functions is suspected, do not operate the alarm
system.
Fuse
To prevent fire, use a fuse with the specified ratings (current, voltage and type) for the alarm
system.
Turn the POWER switch OFF and cut the mains power before replacing a fuse.
Do not use an unspecified fuse or short-circuit the fuse holder.
Operation in a gas
Do not operate the alarm system in a place where combustible/explosive gases or vapors are
present. Operating the alarm system in such an environment will lead to extreme dangers.
External
connection
Before connecting the alarm system to a detection target or external control circuit, securely
connect it to a protective grounding circuit.
Maintenance of internal parts
Before replacing internal parts or performing any work with the door open, make sure to turn the
power switch OFF.
Response to a gas alarm
There are extreme dangers if a gas exceeding an alarm setpoint is detected. Take proper actions
based on your judgment.
