Atlas Copco Heatless Adsorption Compressed Air Dryer CD 7

Warning: Silencer removal is best carried out during diaphragm replacement

Disconnect silencer from valve block

Silencer can be thoroughly cleaned in warm soapy water. Do not use sharp instruments or tools

Ensure silencer is thoroughly clean and dry

Replace silencer by following the above procedure in reverse

Sign off on the silencer cleaning

Warning: This procedure requires trained personnel with PPE!

Remove front panel as described in §11.5 and locate position of upper and lower bonnets

Bonnets removed by means of four fixing screws?

Bonnet separated from valve block?

Tubing disconnected from fitting on bonnet?

Locate diaphragm assembly to be changed

Diaphragm and bonnet components

Warning: Follow the procedure as shown in the diagram for both simplex and duplex units

Enter the information on the desiccant label

Did you repeat the procedure on both towers?

IMPORTANT! Do not fully tighten retaining bolts until all towers have been serviced.

Did you tighten all bolts to torque 5 Nm after servicing all towers?

Did you dispose of desiccant cartridges in accordance with local waste regulations?

Sign off on the desiccant cartridge replacement

NOTE! Duplex units utilise 2 purge plugs. The plugs must be changed together. Removal of the front and rear panels is necessary for this procedure

Remove front panel of dryer as described in §11.5 and locate purge plug in upper valve block

Remove purge plug fixing screw from upper valve block

Remove purge plug from port in upper valve block downwards

Orifice in purge plug can be identified by reference number on the front face

Re-fit purge plug after ensuring suitability and correct size for operating conditions. ‘O’ rings must be in good condition and slightly lubricated with the silicone free agent before fitting

Replace and tighten purge plug fixing screw in upper valve block;

Dryer with front facial panel fitted

Remove front facial panel by tilting outwards and downwards

Dryer with front facial panel removed

Re-fit front facial panel by insertion of tongue into groove and pushing upwards and inwards

Sign off on the front panel replacement