Gardner Denver Screw Air Compressor VS75

Warning: Only check the oil level when the screw compressor unit is out of operation and depressurized! The pressure reservoir can be under pressure and the oil hot. Warning: Danger of scalding!

Important: Do not spill oil! Check for leakage!

Important: Do not mix oils of different specifications.

Machines which are delivered without oil must first be filled to the max. mark in the pressure reservoir sight glass (see also chapters 8.4 and 8.15)

Stop the compressor, with the stop button.

Wait at least 5 minutes for the oil to settle and for the air to disperse

The oil level is checked with the help of the transparent plastic tube at the pressure reservoir (- 2 - Fig. 14) after every stop and at regular intervals. If required, top up oil

The oil level must be between the maximum level (- 3 - Fig. 14) and minimum level (- 4 - Fig. 14) marked on the oil reservoir.

Also see chapter 8 “Service and maintenance”

Warning: Only perform checks and carry out work on the screw compressor when the unit is out of operation, depressurized, and secured from being switched on again!

Lock water inflow and water outflow on the compressor.

Upload a photo of the suitable container provided to catch any cooling agents draining from the system.

Carefully loosen the cover of the dirt interceptor. Catch any cooling agent draining from the system.

Remove cover and pull filter insert from the housing.

Choose the action performed on the filter insert

Push filter insert into the dirt interceptor housing.

Screw cover into the housing. Ensure that the seal is correctly positioned and that there is no dirt on the sealing ring and the sealing areas.

Tighten cover with a suitable tool.

Check the fittings of the air circuits

Check the fittings of the water circuits

Check the fittings of the oil circuits

Check the hose for unsealed areas

Check the piping for unsealed areas

Sign off on the compressor fittings check

The valve should be tested on a separate compressed air line in accordance with local legislation.

Operate the safety valve (- 1 - Fig. 24), depending on the type of valve:

• Slightly turn the valve cap (-2- Fig. 24) (1-2 turns), and then re-close it.

• Actuation of the bleeding lever/pulling ring

Never operate a screw compressor system with a defective safety valve or without safety valve!;

Clean the filter mat by brushing or washing.

Never install the filter mat in a wet or moist state!

c) Inlet filter to control cabinet (only VS 55-VS 75)

• Open the louvred grilles of the inlet filter (Fig. 27).

• Insert the new filter pad into the louvred grille.

Ensure that the smooth side (-A- Fig. 27) of the filter pad faces the air inlet side.