Gardner Denver Compressor APEX5-15A 15 HP

1. Check the pressure relief valve for proper operation.

Pressure Relief Valve - A pressure relief valve is installed in the final discharge line and set to approximately 120-125% of the unit's full load operating pressure for protection against overpressure. Periodic checks should be made to ensure its operation.

The relief valve should be tested for proper operation at least once every year. To test the relief valve, raise the system operating pressure to 75% of the relief valve set pressure and manually open the valve by turning the cap.

WARNING: When the pressure relief valve opens, a stream of high velocity air is released, resulting in a high noise level and possible discharge of accumulated dirt or other debris. Always wear eye and ear protection and stand clear of the discharge port when testing the relief valve to prevent injury.

CAUTION: Never paint, lubricate or alter a pressure relief valve. Do not plug vent or restrict discharge.

DANGER: Operation of the unit with improper pressure relief valve setting can result in severe personal injury or machine damage. Ensure properly set valves are installed and maintained.

2. Change oil separator, see “Removal of Oil Separator for Inspection or Replacement”, Section 5, page 45, for further details (or when 8 psid pressure differential across the element).

- Oil Separator for Inspection or Replacement.

Be certain the unit is off and all system pressure is relieved.

Warning: This maintenance check requires trained personnel with PPE!

Visual inspection indicates a rupture, crack or pin hole in the pleated media

Pressure drop through a filter with a freshly cleaned element

Pressure drop is below three (3) inches (76 mm) of water with the compressor running at full load

Element replaced after six (6) cleanings

Sign off on the air filter element life maintenance

Clean every 50 to 150 operating hours depending on dust conditions.

NOTICE: Use only genuine Gardner Denver air filter elements on Gardner Denver compressor units. Genuine parts are available through your authorized Gardner Denver distributor.

Remove the clips and pull out the filter element.

Visually inspect the element. If cleaning is not necessary, reinstall the filter element. If the element is dirty, replace.

Inspect the element for ruptures or cracks in the pleated media; replace the element if any are found.

Inspect the gasket on the bottom (outlet end) of the element; replace the entire element if the gasket is damaged.

A spare element will keep down time to a minimum.

Sign off on the air filter element service

WARNING: Rotating machinery can cause injury or death. Open main disconnect, lockout and tagout power supply to starter before working on the electric motor.

Disconnect, lockout and tagout the unit from the power supply.

Remove the relief plug and free hole of hardened grease.

Wipe lubrication fitting clean and add grease with a hand-operated grease gun.

Leave the relief plug temporarily off. Reconnect unit and run for about 20 minutes to expel the excess grease.

Stop the unit. Replace the relief plug.

Sign off on the motor lubrication procedure