Gardner Denver Compressor VS70A

Draining and Cleaning the Oil System

Is the unit completely off and oil sump depressurized?

Is the power supply to the compressor package disconnected, locked out, and tagged out?

Is the valve isolating compressor package from air system closed (if provided by user)?

Is the fill plug (1) and drain valve (3) removed to evacuate oil?

Is the drain valve (3) closed, oil added up to top of measuring rod, and fill plug replaced?

Describe the condition of the drained oil and/or the oil filter element.

Is the unit completely off and oil sump depressurized?

1. Heat Exchangers (air-cooled) - Check for dirt accumulation on (air-cooled) air/oil heat exchanger finned surfaces.

1.1 Be sure the unit is completely off and that oil reservoir is depressurized

1.2 Disconnect, lockout, and tagout power supply to the compressor package

1.3 Open and/or remove enclosure door panels adjacent to cooler assembly

1.4 Locate cooler housing side covers (See Figure 6-2) and remove by unscrewing fasteners

1.5 Inspect core area. If blocked with debris, use a moderate (e.g., 100 psi) source of compressed air and/or water while directing nozzle (pointed through core to inside) to dislodge debris and clean. Vacuum (applied from inside) can also be employed to clean the heat exchanger cores

1.6 Remove all loose debris and water from cooler box after cleaning process is complete

1.7 Re-attach cooler housing side covers with provided fasteners and re-install enclosure door panels

2. Air Filter (Electrical Box) – Check filter elements for dirt accumulation.

1. Heat Exchangers (air and water-cooled) – Check cooling performance of air and oil cores

- The compressors require a stable, cool (140°F typical at 80°F ambient air) supply of injection oil in order to operate at optimal efficiency; Under these conditions, the oil core allows 23 gpm oil flow with 7.7 psid pressure loss

- The lubricating and cooling oil must be kept at a normal operating temperature below 225°F in order to preserve its longevity

- The compressed air supply must be delivered into the distribution system at a temperature not exceeding 15°F above the ambient level in order to protect other devices (e.g., filters, dryers, tools, etc.) against damage; At 100 psi of discharge pressure, the air core allows the flow of 427 cfm with 1.1 psid pressure loss

2. Pressure Relief Valve – Check operation of device:

2.1 Raise the system operating pressure to its normal level

2.2 Turn the top cap on valve 1-2 turns counter-clockwise to open valve and let it vent for a few seconds

2.3 Close the valve by firmly turning top cap clockwise. Make sure that cap is firmly tightened to avoid damage by vibrations

3. Motor Lubrication – Inspect motors for abnormal noise and vibration; Grease-lubricate per guidelines included in Section 13 of this manual:

Warning: This procedure requires trained personnel with PPE!

Enter the current operation hours of the unit

Is the unit completely off and the oil sump depressurized?

Power supply to the compressor package disconnected, locked out, and tagged out?

Valve isolating compressor package from air system closed (when provided)?

Cartridge unscrewed and removed with adequate tool (e.g., strap wrench)?

Sealing surface on filter housing cleaned (wiped) and lubricated with grease?

O-ring seal on new element lubricated with grease?

New element screwed onto filter head firmly – approximately 3/4 turns after cartridge and head make contact?

1. Check Air Filter (Compressor) - Replace when controller displays “CHANGE AIR FILTER” message.

1.1 Remove air cleaner cover (1) and remove filter element

1.2 Visually inspect housing inner tube against which the element makes a seal. Wipe dirt from outer surface if necessary. Also visually inspect the matching o-ring seal that is bonded to the element for defects and dirt, then wipe clean if necessary.

1.3 Visually inspect media. If flaws (e.g., tears of media, damage to sealing o-ring, etc.) are evident or if the pressure loss has triggered the vacuum switch (activation level is 30 inches water gauge) provided with the package instrumentation, replace the element. Cleansing the element with air or water is not recommended, as media damage is very probable

1.4 Replace element and cover and fasten cover to filter housing.

2. Check Oil Separator Element - Replace when controller displays “CHANGE OIL SEPARATOR ELEMENT”.

3. Check Air/Oil Reservoir Oil Level - Check the reservoir oil level during compressor operation only - add oil if required.

Check oil level only with the compressor stopped. Normal oil level is the middle of the measuring rod. Add oil only when oil level has reached the bottom of the measuring rod. Drain oil only when the oil level is beyond the top of the measuring rod.

4. Start/Modulation/Stop Operation – Verify that compressors maintain steady compressed air pressure.