DNS NHP 5500 - AIR SERVICE UNIT: After Installment Inspection

Checkpoint

• Pressure gauge

• Pressure switch

• Pipings

• Bolts and connectors

Remark

• 0.54MPa

• 0.4MPa

• Air leakage

Checkpoint

• Air blow for cleaning

Remark

• ATC & APC

Checkpoint

• Tank for filter device

Remark

• Extract water

Air filter replacement of the air service unit (Main air)

• Turn the power off and lock the MCCB handle.

• If shutoff valve is available, shutoff compressed air with the shutoff valve. (Compressed air may not be automatically shutoff when the power is shutoff. Be sure to check if the pressure is "0" with a pressure gauge before continuing the work).

• Unfasten the bolt on top of the filter and take out the filter body.

• Replace the element, gasket and O-ring

• Fix the filter body with the bolt again.

• Remove the filter (2) cap downwards. (Pull the hook on the cap to the left or right sides).

• Turn the filter supporter counterclockwise.

• Replace the element. (For assembly, use reverse order of disassembly).

[Note] Manual drain (Main air)

• Moisture or dusts inside the separator can be automatically discharged.

• If drainage is not possible due to a failure of the auto drain valve (the drain can be checked through the check window), rotate the handle on the bottom left (“0”) to start discharging.

• In this case, as air pressure may remain inside, open slowly.

Air filter replacement of the air service unit (Scale_optional specifications)

• Turn the power off and lock the MCCB handle.

• Pull the filter (1) cap hook downwards, and turn to the left or right

• Remove the cap downwards

Replace the element. (For assembly, use reverse order of disassembly.)

• Replace the element of filter (2) and (3) using the same method.