Bendix Commercial Vehicle Systems AD-IS EVERFLOW - Manual (Page 3)

3
The air dryer consists of a “spin on” desiccant cartridge
secured to a base assembly. The base assembly contains
a delivery check valve assembly, safety valve, heater and
thermostat assembly, pressure protection valves, threaded
air connections, and the purge valve assembly.
The removable purge valve assembly incorporates the
purge valve mechanism and a turbocharger cut-off feature
that is designed to prevent loss of engine “turbo” boost
pressure during the purge cycle of the Bendix ® AD-IS ® air
dryer. For ease of maintenance, all replaceable assemblies
can be serviced without removal of the air dryer from
its mounting on the vehicle. Refer to the Preventative
Maintenance section.
These units will not operate properly with a Holset-type
compressor. For discharge line unloaded compressors
a three way valve must be installed upstream of the air
dryer. Contact Bendix Commercial Vehicle Systems for
additional information.
BENDIX ® AD-IS ® EVERFLOW ® ASSEMBLY
OPERATION
GENERAL (Refer to Figure 2)
The Bendix
® AD-IS ® EverFlow ® assembly is designed to
receive compressed air from the vehicle air compressor.
It then cleans and dries the air before delivering it to
the vehicle’s primary reservoir, secondary reservoir and
accessories. Additionally, the AD-IS EverFlow assembly
controls the compressor/dryer charge cycle.
FIGURE 2 - BENDIX ® AD-IS ® AIR DRYER SYSTEM SCHEMATIC
Note:
The Bendix
® AD-IS ® air dryer purge piston has a purge control
channel drain. This allows any condensation in this area to flow
past a diaphragm in the top of the purge piston and out through
a channel in the middle of the central bolt of the purge assembly
to be drained. During the purge cycle this drain is closed.
Bulk Tanker
Secondary
Reservoir
Primary
Reservoir
CTI System
Pressure
Protection Valve
IN
CON
OUT
From
Engine
CON
RES
CON
Bendix
®
AD-IS
®
EverFlow
®
Assembly
Schrader
Valve CON
RES
CON
GOV
3/8"
1/2"
1/2"
1/4"
CON
Bulk Offload CTI
Dryer OUT
Check
Valve
Supply
IN
SEC
PRI
Supply
IN
CON
Manual Valve
Accessories
Compressor
Bendix ® EverFlow ® Electronic Module
Governor
Compressor
OUT
CON
EverFlow ®
IN
Discharge Line
Unloader Valve
Bendix ®
AD-IS ®
Air Dryer
AD-IS
Air Dryer