Ingersoll Rand Refrigarated Air Dryer DXR1000

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

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

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 by opening the bypass valve and closing 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.

Enter the current hours of dryer operation

Is the yellow SERVICE DUE indicator light on?

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

Disassemble and clean automatic drain valve

Disassemble and clean separator bowl (models DXR150 and larger)

For air-cooled condensers, inspect the condenser coils, clean if necessary. Lubricate fan motors with 20 wt motor oil (if necessary)

For water-cooled condensers, clean customer-supplied strainer

To reset the SERVICE DUE INDICATOR, follow these steps:

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

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

Main power supply to dryer disconnected

Power supply locked out and tagged in accordance with OSHA requirements

Hoses that connect the drain valve to the separator removed

Screw and washer from front of the drain valve removed

Power supply connector and gasket (with timer assembly if attached) removed from the solenoid coil housing

13mm nut and spring washer from top of solenoid coil housing removed