sb23032_spec Page 1 of 3
Air drier
AIRDRY-E
Electronically controlled air drier
Make..... Wabco
Type..... 1 tower
Part number..... 20466522, 20700794, 20884103
Max operating pressure..... 13 bar
Connection and disconnection pressures:
The cut-in and cut-out pressure is set via the vehicle control unit software and cannot be altered.
For the appropriate programmed value, see the table below.
Regeneration:
Recirculation from the air system is controlled via parameters set in the vehicle control unit. The
default value for recirculation is 12% - 15% depending on the air drier.
http://192.168.0.233:8800/impact3/application/staticdb/lang/enGB/sb23032_spec.xhtm 10/3/2008
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Part number 20466522: 15%
Part number 20700794: 15%
Part number 20884103: 12%
On vehicles that for some reason cannot manage to dry the air (e.g. extreme use of the compressor),
the recirculation value can be increased using VCADS-PRO.
Supply voltage..... 24V
Power consumption:
- Heating..... 4A
- Solenoid valves..... 2 x 0.32 A
*Relief valve heating is:
- In when the temperature drops below..... +7°C ± 6°C
- Out when the temperature rises above..... +29.5°C ± 3.0°C
*The heating function applies only to part number 20466522.
Cut-
Cut-in and cut-
cut-out pressures, value for AIRDRY-
AIRDRY-E
Variant Low speed / Engine braking * High speed
Normal mode Protective mode ** Normal mode Protective mode **
Cut-in Cut-out Minimum Maximum Cut-in Cut-out Minimum Maximum
pressure pressure cut-in cut-out pressure pressure cut-in cut-out
pressure pressure pressure pressure
ASCOP120
10.6 bar 12.0 bar 8.6 bar 12.0 bar 9.6 bar 10.6 bar 9.6 bar 10.6 bar
Standard
ASCOP120
Leaf spring 10.6 bar 12.0 bar 8.6 bar 12.0 bar 10.6 bar 12.0 bar 9.6 bar 12.0 bar
EBS
ASCOP85
Leaf spring
7.5 bar 8.5 bar 7.0 bar 8.5 bar 7.5 bar 8.5 bar 7.5 bar 8.5 bar
suspension
ABS / UABS
ASCOP120
10.6 bar 12.0 bar 10.6 bar 12.0 bar 10.6 bar 12.0 bar 10.6 bar 12.0 bar
Pusher
ASCOP100
9.0 bar 9.8 bar 9.0 bar 9.8 bar 9.0 bar 9.8 bar 9.0 bar 9.8 bar
Japan
http://192.168.0.233:8800/impact3/application/staticdb/lang/enGB/sb23032_spec.xhtm 10/3/2008
sb23032_spec Page 3 of 3
* Speed lower than 30 km/h, and at higher speed in conjunction with engine braking.
** A fault code is set in the vehicle control unit, MID
MID144
144 Protective mode = Control unit goes to protective
mode (exceeds time out) for air pumping and has drying of air by relieving the compressor as priority and
performs forced regeneration of the air drier. This reduces the compressors ability to pump air out to the
system. Air pressure is however always ensured so that braking power and lifting power for air suspension is
retained.
http://192.168.0.233:8800/impact3/application/staticdb/lang/enGB/sb23032_spec.xhtm 10/3/2008
