Ingersoll Rand Refrigarated Air Dryer DXR250

Air-cooled condensers maintenance

Remove dust, dirt or other particles with a soft brush or with compressed air from an OSHA-approved air nozzle that limits its discharge pressure to 30 psig

If the coils are coated with oil, grease or other substances that reduce the cooling efficiency, clean the coil

See Ambient Air Filter Replacement procedure

Sign off on the monthly dryer maintenance

Warning: Only perform this procedure if your unit is equipped with the optional ambient air filter (designated by the suffix F in the model number)

Inspect the filter element. Does it need replacement?

Enter the model number of the replacement element

Record the date of the element change

Upload a photo of the new 'Element Change' label applied over the previous one

Sign off on the filter replacement

Yellow SERVICE DUE indicator light on

If the SERVICE DUE indicator is on, complete the following steps

Automatic drain valve disassembled and cleaned

Separator bowl disassembled and cleaned (models DXR150 and larger)

Air-cooled condensers inspected and cleaned (if necessary)

Fan motors lubricated with 20 wt motor oil (if necessary)

Water-cooled condensers cleaned

To reset the SERVICE DUE INDICATOR, follow these steps

• All DXR Serics dryers have a timer-controlled automatic drain valve. The valve body is mounted on the frame bottom; a hose connects the valve body to the separator.

CAUTION! Do not disassemble drain valve timer or attempt to repair electrical parts. Replace timer if defective.

• The drain valves discharge condensate through a full-port drain opening.

• The valve body may necd to be cleaned under conditions of gross particulate contamination. To disassemble the drain valve body for cleaning or other maintenance.

2. Disconnect main power supply to dryer.

3. Lock out and tag power supply in accordance with OSHA requirements.

WARNING! If power supply is not disconnected before disassembly, serious personal injury and valve damage may result.

4. Remove hoses that connect the drain valve to the separator.

Prefilter differential pressure gauge checked

Filter element replaced when pointer reaches red zone of gauge (approx. 7 to 10 psid)

Failure to change element at least once a year or when the gauge reaches the red zone will adversely affect dryer performance.

Internal float drain valve on the prefilter inspected every two to three weeks for excessive oil and water

Test valve on the bottom of the filter unit pressed

Drain valve cleaned or replaced as required if more than one or two drops of oil leak out

Sign off on the weekly dryer maintenance