Gardner Denver Base Mounted Compressor LRS90

When checking pressure relief valve thereis an explosive release of pressure.

Failure to perform this operation in a safe manner or without safety equipment may result in personal injury ordeath.

 Use the appropriate safety equipment, hearing and eye protection, and use safety precautions when performing this PRV check on an operating machine.

Testing the pressure relief valve

1. On a separate compressed-air system.

2. When raising the system operating pressure toits normal level.

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

Unit disconnected, locked out and tagged out from the power supply?

Relief plug removed and free hole of hardened grease?

Lubrication fitting wiped clean and grease added with a hand-operated grease gun?

Unit reconnected and run for about 20 minutes to expel the excess grease?

Unit stopped and relief plug replaced?

Danger! Air/oil under pressure will cause severe personal injury or death. Shut down the compressor, relieve the system of all pressure, disconnect, lockout and tagout the power supply to the compressor package before removing valves, caps, plugs, fittings, bolts and filters.

Caution! Fire hazard and slip hazard! Do not spill any oil! Oil residue and other deposits must be removed from the compressor coolers which are exposed to hot air in accordance with the user manual. Look for leaks! Immediately take care of any spilled oil!

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 to relieve the screw compressor of any residual pressure in the system.

Open the oil drain from the pressure reservoir.

Drain the oil at operating temperature through the drain hose.

Fill with oil up to the mark “maximum oil level”.

Danger: High voltage – Hazard of shock, burn, or death. Be careful with electricity: only work on screw compressors which are not powered.

Only for L90RS-L132RS: There is a risk of electric shock from charged capacitors! Disconnect the system from the mains and wait 10 minutes before touching electrical components.

Warning: Some parts of the system will still be pressurized after the system has been switched off. Small parts propelled at high speed by compressed air can penetrate the skin or destroy an eye.

Caution: Burn hazard – Hot surfaces. Be careful of the hot surfaces of machine parts when carrying out checks, making settings and doing maintenance.

Check for dirt accumulation on oil/aftercooler core faces and the cooling fan.

Clean the exterior fin surfaces of the cores by blowing compressed air carrying a nonflammable safety solvent, that will not damage aluminum in a direction opposite that of the cooling air flow.

Press the STOP button on the control panel and wait until the screw compressor comes to a stop and the screw compressor unit is depressurized.

Enter the pressure gauge reading

Relieve the screw compressor unit by slowly opening the screw plug (oil filling opening) with integrated air vent slots.

Danger: High voltage – Hazard of shock, burn, or death. Be careful with electricity: only work on screw compressors which are not powered.

Only for L90RS-L132RS: There is a risk of electric shock from charged capacitors! Disconnect the system from the mains and wait 10 minutes before touching electrical components.

Warning! Some parts of the system will still be pressurized after the system has been switched off. Small parts propelled at high speed by compressed air can penetrate the skin or destroy an eye.

Caution! Burn hazard – Hot surfaces. Be careful of the hot surfaces of machine parts when carrying out checks, making settings and doing maintenance.

Check air/oil reservoir oil level, add oil if required. DO NOT MIX LUBRICANTS.

Check operation of the machine, is it loading and unloading properly.

Check control panel for advisory text messages.