Ingersoll Rand Refrigarated Air Dryer DXR425

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

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

DANGER! Vent internal pressure to atmospheric pressure before performing any maintenance.

Is the filter isolated by opening the bypass valve and closing both isolation valves?

Is the pressure bleed valve open to vent the filter to atmospheric pressure?

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

DANGER! 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 element from the filter head with a brisk downward pull, or by working the element back and forth until it snaps free. Discard the element in accordance with applicable regulations.

Clean accumulated debris from the bowl with soap and water, and dry thoroughly.

CAUTION! Lubricate the element O-ring with a petroleum-based lubricant that is compatible with your application.

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?

Upload a photo of the filter element if replacement is needed

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