Start Up; During Operation; Stopping; Maintenance - Atlas Copco CD7 Bedienungsanleitung

CD7 – CD12 – CD17 – CD24 – CD32 – CD44 – CD60

Start up

If the dryer has not been used for more than 3 months, refer to the
chapter "Initial start up". In all other cases proceed as follows:
1. Cut off the air supply from the compressor towards the dryer by
closing the external inlet valve.
2. If installed, close the external outlet valve between the dryer unit
and the dry air consumer.
3. Slowly open the external inlet valve.
4. Switch the dryer on by putting switch S1 in position I.
5. Gradually open the air outlet valve.
6. As required, close the bypass valves of the dryer.
!
Close the external inlet valve in case the compressor needs
to be restarted. The air speed in the start-up phase of the
compressor may damage the desiccant.

During operation

At regular intervals, check the moisture indicator. If it shows pink and
the application allows only dry air, shut down the application and let
the dryer regenerate.

Stopping

To stop the dryer proceed as follows:
1. If installed and if necessary, open the bypass valves of the dryer
so that the application will still receive compressed air.
2. Close the external inlet valve between the compressor and the
dryer and the external outlet valve between the dryer and the dry
air consumer.
3. Let the dryer run for a period without consumption, to
depressurize the vessels.
4. Switch the dryer off by putting S1 in position O.
!
If the dryer is stopped for a longer period, close the inlet and
outlet valve to avoid moisture from entering the dryer.
6

MAINTENANCE

General recommendations and precautions

The dryer does not need any specific maintenance. Nevertheless,
before carrying out any maintenance or corrective activity, read the
following recommendations
accordingly:
– Check that the on/off switch S1 is in position O.
– Disconnect pressure sources and vent the internal pressure of
the system before dismantling any pressurized component.
– Use original Atlas Copco spare parts only.
– Check the correct operating after maintenance.
!
Filters and valves installed between the compressor, the
dryer and the air consumer may need other maintenance
activities than those mentioned below (e.g. draining the fil-
ters and replacing the filter elements). Refer to the appropri-
ate manual for more information.

Maintenance activities

Daily
– Check the colour of the moisture indicator.
Twice a year
– Check for damaged wiring or loose connections.
– Check for air leaks.
(Every five years)
In normal working conditions, the lifetime of the desiccant is
approximately 5 years. It is recommended to have the desiccant
replaced by an Atlas Copco service technician.
and safety precautions and
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