Atlas Copco Air Dryer CD 22+

Warning: Ensure the dryer is off and unplugged before starting the procedure.

Orange service warning LED (4) flashing at 11500 hours

Red service alarm LED (5) flashing at 12000 hours

Dryer closed off as per stopping procedure

Power cord of the dryer pulled out

Service plan performed as scheduled

Dryer restarted by reconnecting the power cord

Counter restarted, dryer operating LED (1) alight, and LED's (2 and 3) indicating the cycling status of the dryer

Service warning LED (4) or service alarm LED (5) still flashing

Inlet filter cartridge replaced

Exhaust valve diaphragm and solenoid valves replaced

Shuttle valve and o-rings replaced

Sign off on the air dryer maintenance

Four M10 bolts from the top cover of one tower of the dryer removed

Top cover plate from the dryer removed

Two M4 bolts removed and handle taken out

Purge nozzle and spring removed

New purge nozzle with the spring on top inserted

Handle put back on top of the purge nozzle and two bolts tightened

Top plate put back on with the O-ring in place

M10 bolts tightened with no leaks

• Replace the inlet filter cartridge.

• Replace desiccant cartridges.

Desiccant replacement procedure

1. Completely depressurise the dryer. Consult Stopping the dryer in section Operating instructions.

2. Remove the four M10 bolts from the top cover of one tower of the dryer.

3. Remove the top cover plate and O-ring from the dryer.

4. Remove the cartridge from the dryer.

5. Take off the handle from the old cartridge by unscrewing the M4 bolts and take out the spring and nozzle.