Gardner Denver L4-5C Original User Manual page 20

Operation at excessive discharge air pressure can cause personal injury or
damage to equipment. Do not adjust the operating discharge air pressure above
the maximum stamped on the unit nameplate.
11. Enclosure - Check for damaged panels or doors. Check all screws and latches for tightness. Be
sure doors are closed and latched.
The compressor starts and stops automatically. Automatic restarting can cause
injury or death. Open, lockout and tagout main disconnect and any other
circuits before servicing the unit.
The enclosure doors must be closed and latched to keep the compressor
package from overheating when the compressor is running.
After an emergency stop, be sure that the pressure in the air/oil reservoir is less
than 5 psig. Wait one minute or more before restarting.
The controller has an automatic start/stop sequence built in. You DO NOT need
to close the air service valve. Closing the air service valve on start-up or prior to
shutdown will cause rapid cycling, and could cause a high pressure shutdown.
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