Gardner Denver Screw Air Compressor VS55

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.

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!;

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”;

Danger: Danger of electric shock! Work on the control cabinet may only be carried out by electrotechnical specialist personnel.

When carrying out adjustment work on the control power transformer, the unit must be electrically isolated and locked off.

Only VS 55-VS 75: Danger of electric shock from loaded condensers! Please always first disconnect the system from the power supply and wait another 10 minutes before touching the electrical components.

Important: A wrong setting of the control-power transformer jeopardizes the trouble-free operation of compressor units and can result in malfunction or damage.

The verification of the control-power transformer setting is a must during commissioning and periodic inspection/ maintenance, as the voltage supply conditions may vary.

The connecting terminals in the switch cabinet have to be checked and, if required, re-tightened during first commissioning and later on in line with the maintenance schedule.

Switch the unit on as described in Chapter 7.4.

Check the control transformer output voltages while operating under load.

Switch the unit off as described in Chapter 7.6.

Perform filter mat change as follows:

a) Filter mat, cooling-air inlet

• Remove fixing screws (- 2 - Fig. 27).

• Remove filter mat (- 1 - Fig. 27) and clean, exchange if damaged.

• Re-insert filter mat in sound insulating panel (- 3 - Fig. 27).

• Secure filter mat by means of fixing screws.

b) Filter mat of optional dryer

• Remove fixing screws (-5- Fig. 27) and remove cover plate (-4- Fig. 27).

• Loosen locknuts and remove filter mat of optional dryer (-6- Fig. 27) and clean or, in the case of damage, replace.