Gardner Denver APEXVS7-11A, Operating And Service Manual

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CHANGING MINIMUM PRESSURE/CHECK VALVE SEALS
1. Be sure the unit is completely off and that no air pressure is in the oil reservoir and in the air cooled
aftercooler. Close the service valve.
2. Disconnect lockout and tagout the power supply to the starter.
3. Remove the minimum pressure/check valve cap; the internal parts will come out with the cap.
Remove the internal parts.
4. Replace the minimum pressure/check valve seals.
5. Re-assemble the valve.
6. Assemble the minimum pressure check valve assembly into the housing.
7. Run the unit and check for leaks.
CONVERSION INSTRUCTIONS
Automatic restarting or electrical shock can cause injury or death. Open,
lockout and tagout main disconnect and any other circuits before servicing
unit.
Operation with incorrect motor rotation can damage equipment and cause oil
eruption from the compressor inlet. When checking motor rotation, induce
minimum rotation (less than one revolution if possible). Never allow motor to
reach full speed.
The compressor unit’s direction of rotation must be check every time the
compressor is reconnected to the power supply.