8,000 Hour Gardener Denver Compressor Inspection

Every 8000 hours operation or 24 months

• Inspect solenoid valves /vacuum switch operation, replace if necessary.

• Inspect blow-down valve operation, replace if necessary.

• Inspect thermistor probes operation, replace if necessary.

• Inspect pressure transducer, replace if necessary.

• Inspect control valves and pressure regulator, replace if necessary.

• Inspect thermal mixing valve operation, replace element if necessary. See Fig. 2 "Thermal Mixing Valve" and "Compressor Oil System Check".

• Inspect and replace if necessary, the drive coupling spider (coupling element). See Section 7.

• Inspect hoses, replace if necessary.

Oil Change

• Replace lubricant every 8000 hours **. Under adverse conditions, change more frequently (refer to "Oil Change Interval", in Section 10.4). Flush system if required.

• Turn off the screw compressor unit, secure it against accidental restarts and make sure that the demister vessel is depressurized.

• Slowly open the oil screw plug (- 2 - Fig. 16) to relieve the screw compressor of any residual pressure in the system.

• Remove the oil screw plug.

• Open the oil drain (- 6 - Fig. 16) from the pressure reservoir.

• Drain the oil at operating temperature through the drain hose (- 7 - Fig. 16)

• Close the oil drain.

• Fill with oil up to the mark "maximum oil level"(- 4 - Fig. 16) (approx. 14.3 US-Gal.)

• Close the oil screw plug.

• Run the screw compressor for approximately 2minutes.

• Check for leaks.

• Shut off the screw compressor.

• Wait at least 5 minutes until the oil has settles, i.e. until the air has bubbled out.

• Check the oil level.

• The oil level must lie between the "maximum oil level"(- 4 - Fig. 16) and "minimum oil level" (- 5 - Fig. 16).

• If necessary, top up the oil.