Ingersoll Rand Refrigarated Air Dryer DXR600

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. Is it in good condition?

If the filter element is not in good condition, replace it.

Enter the model number of the replacement element

Record the date of the element change

Upload a photo of the 'Element Change' label with the updated information

Sign off on the filter replacement

Warning: Vent internal pressure to atmospheric pressure before performing any maintenance.

Inspect the internal float drain valve on the prefilter for excessive oil and water by pressing the test valve on the bottom of the filter. If more than one or two drops of oil leak out, the drain valve should be cleaned or replaced as required.

Servicing the float drain valve.

Isolate the filter, open the bypass valve and close both isolation valves.

Open the pressure bleed valve to vent the filter to atmospheric pressure.

Disconnect drain lines and automatic drain valves (if installed).

Warning: A 'hissing' sound while the bowl is being removed indicates the filter has not been properly depressurized. DO NOT continue to remove the bowl until the filter has been completely vented to atmospheric pressure.

Remove the bottom bowl by unscrewing it from the head. A strap wrench may be needed.

Remove the nut from the bottom of the bowl.

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

More than one or two drops of oil leaked out?

If more than one or two drops of oil leak out, the drain valve should be cleaned or replaced as required.

Sign off on the weekly dryer maintenance

• 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.

DANGER: Dismantling or working on any component of the compressed air system under pressure may cause equipment failure and serious personal injury. Before dismantling any part of the dryer or compressed air system, completely vent the internal pressure to the atmosphere.

For continued good performance of your refrigerated dryer, all refrigeration system maintenance should be performed by a competent refrigeration mechanic.

Before corrective maintenance is done during the warranty period, call your local distributor and proceed according to instructions. Refer to the warranty for limits of your coverage.

Check the operation of the automatic drain valve at least once during each 8-hour shift.

On models 75 to 100 scfm, inspect and clean (if necessary) the drain valve strainer. See the Field Service Guide for remedies to drain valve malfunctions. See the Instrumentation section for drain valve adjustment.

For models with the System Operation Monitor, check the following readouts.

Refrigerant suction temperature

Refrigerant discharge temperature