Louvers
The louvers are located on top of the unit on the
intake and exhaust. They are pneumatically
controlled using solenoid valves. Activation of
the valve opens the louvers, deactivation closes.
There are indicator lights on the DIN connectors
for the valves to show if power is present or not.
The louvers are opened and shut using a
pneumatic cylinder. The cylinder has a spring
extension so that the loss of power will force the
louvers shut. Check valves are in place so that if
compressed air is lost or low, the louvers will not shut blocking air flow to the unit. Compressed air is
not required to close the louvers, only to open them due to the spring extension.
The door is sealed using bubble gasket. The seal is only to block air flow, and is not necessarily a
100% seal.
The louvers close to prevent airflow when the fire suppression system is activated. On multi-module
units, louvers are used for each intake and exhaust.
Fire Suppression Agent
The fire suppression agent generator is activated by the 24VDC signal from the controller or the heat
detection tubing. Once started, it cannot be stopped. Dry Chemical Agent is ejected into the filter
compartment. The agent interferes with the combustion reaction.
The fire bottle containing the fire suppression agent is mounted outside of the unit.
Additional Sprinkler
An additional sprinkler can be added to the unit to help extinguish fire. A ½” pipe can be found
hanging out of the unit. This pipe routes to the filter compartment side. This pipe allows for additional
water sprinkler to be added to the unit to help extinguish fire and needs to be connected to water
supply.
Copyright © Clean Air Industries , Inc.
Liberty WeldCell User Manual, August 2023
Page 32 of 66
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