Ingersoll Rand Refrigarated Air Dryer DXR150

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

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

Sign off on the monthly 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.

Service Due indicator light is on

If the Service Due indicator light is on, complete the following steps

Disassemble and clean automatic drain valve

Disassemble and clean separator bowl (models DXR150 and larger)

Inspect the condenser coils, clean if necessary

Lubricate fan motors with 20 wt motor oil (if necessary)

Clean customer-supplied strainer

To reset the SERVICE DUE INDICATOR, follow these steps

Prefilter differential pressure gauge checked

Filter element replaced when pointer reaches red zone of gauge

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

Test valve on the bottom of the filter unit pressed for excessive oil and water

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

Sign off on the weekly dryer maintenance