Technical data

Rev.February 1996 Conti-Dryer Page 5
CD 25-600
2.4 Standards, directives, instructions etc. used
EN - 60204 - 1 / IEC - 204 – 1
IEC – 529
AT - instruction no. 2.2.0.1 of October 1990
Directive no. 73/23/EEC (low tension directive)
Directive no. 89/336/EEC changed by directive no. 92/31/EEC (EMC-directive).
Directive no. 89/392/EEC changed by directive no. 91/368/EEC (machine directive).
2.5 Operation principles
When the machine is turned on the blower (7) starts. The air goes pass the heater (3), via the
drying hopper (1) and the fi lter housing (4) in a partly closed circuit.
When the air in the sytem has reached the temperature preset on the temperature controller
(13), the heater (3) turns off.
To aid to evaporation of water vapour being released from the plastic granules, the air is
exchanged by means of a fresh air valve (5). Fresh air is taken in through the intake fi lter (8),
and the varm, moisty air leaves the system through the fi lter bag (9).
The fresh air valve (5) is continuously adjustable to ensure an optimum ratio between
recycled and fresh air.
R1621