Ingersoll Rand Compressor NVC400

Depressurize the system before disassembling filters

Check pressure differential gauge for filter element change indication

Change carbon elements if hydrocarbons are detected downstream or every six months

Replace all filter elements simultaneously to avoid mixing new and old elements

Verify air quality after filter replacement

Ensure dryer is depressurized or isolation valve is closed

Disconnect drain body from filter stop

Loosen connector screw to remove electrical connector assembly from D.I.N. unit solenoid

Remove retainer nut and separate valve body from D.I.N. unit solenoid

Unthread plunger tube assembly counterclockwise until plunger separates from valve body

Clean beveled washer, thread gasket, spring assembly, and strainer with soap and water

Clean center brass orifice and rubber gasket orifice on orifice cup with a straight pin

WARNING: Ensure the device is pressureless and de-energized before maintenance.

Close the drain isolation ball valves.

Remove control unit by pressing latching hook.

Remove design shell using a screwdriver, where applicable.

Remove service unit from pipe at inlet by undoing union nut or by undoing screws at elbow connector or by undoing screws at intermediate adapter.

Detach intermediate adapter from the service unit by downward movement.

Check if new service unit matches control unit - type designation and colour of latching hook.

Fit new service unit in reverse order.

Check if service unit matches control unit

Inspect sensor tube plate with contact springs

Insert sensor into sensor tube plate

Fit latching hook of control unit into sensor tube plate

Press control unit against service unit and snap into place

Open drain isolation ball valve

Press drain test button to verify proper drain operation