FSS C OMPONENTS
Key Switch
NOTE: The system can only be deactivated while
the power is off. The key switch will not function
once power to the panel has been turned on using
the Disconnect.
The key switch is located on the front of the
electrical door, and it is a retentive key switch. This
means while the system is turned off, the key cannot
be removed. It is recommended that the key be
removed when the fire suppression system is active as a visual check. The fire suppression system
can only be deactivated when the power to the electrical disconnect is off. Once the power is on and
the key has activated the fire suppression system, the system will not turn off even if the key switch is
activated. The power must be off to deactivate the system. The key switch is wired fail safe so that if
the wires are removed or cut, the fire suppression system is activated.
The fire suppression system can be deactivated using the key switch. When changing the filters in the
system per proper maintenance, dust can be dropper through cads and below the filter compartment.
This dust can then trigger the smoke sensors in the valve compartment. To prevent this, it is
recommended that the fire suppression be turned off using the key switch for several minutes upon
restarting the system after a filter change. After several minutes, the fire suppression can be
reactivated while the system is still running (it need not be restarted again). This process is only
necessary after filter changes, not on all startups.
If the key switch has been activated, the display will show “FSS OFF” as shown in the picture below.
Copyright © Clean Air Industries , Inc.
Liberty WeldCell User Manual, August 2023
Page 26 of 66
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