Ingersoll Rand Refrigerated Air Dryers TM500

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

Disconnect main power supply to dryer.

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

Remove screw and washer from front of valve.

Remove the power supply connector and gasket from the solenoid coil housing. Do not damage or lose the gasket.

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

Lift solenoid coil housing off solenoid core in valve body.

Unscrew solenoid core from valve body.

Warning: This procedure requires trained personnel with PPE!

Fouling: Biological and organic substances (slime) can cause problems, but in elevated temperature environments such as cooling processes they are not a major concern. If they create problems with clogging, commercial shock treatments are available.

To ensure continued good operation and performance of the dryer cooling system, the recommended ranges for different water constituents are below.

Dissolved oxygen concentration in ppm

Is the dissolved oxygen concentration 0 ppm (as low as possible)?

If stable for several days, analyze weekly.

Sign off on the daily water quality analysis

Inspect the condenser coils for air-cooled condensers

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 coils with a solvent

Follow the solvent manufacturer's directions for proper use and disposal, including the use of proper protective equipment

Sign off on the monthly maintenance

Check the operation of the automatic drain valve

Inspect and clean the drain valve strainer

Dryers with the Intelli-Dry Controller

Check the High Temperature Alarm LED

Check the Low Temperature Alarm LED

Dryers with Optional Intelli-Dry RX Controller

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

Vent the internal pressure to the atmosphere. Refer to the shutdown instructions.

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 bow 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 O-ring with a petroleum-based lubricant compatible with your application.

Lightly lubricate the new element O-ring before installing the new element.