Bendix Commercial Vehicle Systems AD-IP INTEGRAL PURGE AIR DRYER 5/07 - Manual (Page 14)

14
SUPPLY RES.
GOVERNOR
PURGE CONTROL
LINE TO CON PORT
HEATER &
THERMOSTAT
LEAD TO
GROUND
DELIVERY LINE
FROM DEL PORT
ON AD-IP ™ AIR
DRYER
AD-IP ™
AIR
DRYER
FUSE
10 AMP - 12 VOLT
5 AMP - 24 VOLT
HEATER &
THERMOSTAT
LEAD TO
IGNITION
SWITCH
DISCHARGE
LINE TO SUP
PORT
FIGURE 10 - AD-IP ™ AIR DRYER INSTALLATION
PURGE EXHAUST LINE
1. If it is necessary to direct AD-IP ™ air dryer discharge
contaminants away from vehicle components it will be
necessary to purchase a special exhaust cover for the
AD-IP
™ air dryer (Pc. No. 112609) and install on the
unit. A 1” (25.4 mm) I.D. hose can be clamped on the
special AD-IP
™ air dryer exhaust cover.
WIRING THE HEATER/THERMOSTAT
1. The air dryer is available with either a 12 or 24 volt heater
which uses 90 watts of power. Determine the vehicle’s
electrical system voltage and make certain that the air
dryer that is to be installed contains the same voltage
heater. The air dryer’s part number can be used to
determine the air dryers heater voltage requirement. The
heater voltage can also be identified by the color of the
heater assembly connector as described in the table
below.
Air Dryer Heater Air Dryer Connector
Voltage Identification
12 Volts White (No other markings)
24 Volts Gray, or White w/Red Dot
2. A two lead, 24 inch, wire harness with attached weather
resistant connector is supplied with all retrofit and
replacement AD-IP
™ air dryers. Connect one of the two
leads of the wire harness to the engine kill or ignition
switch. The remaining lead of the wire harness must be
connected to a good vehicle ground (not to the air dryer
or its mounting bracket). A fuse must be installed in the
power carrying wire; install a 10 amp fuse for 12 volt
heaters and a 5 amp fuse for a 24 volt heater.
3. Use 14 gauge wire if it is necessary to lengthen the wire
harness provided with the AD-IP ™ air dryer. Make certain
all wire splices are waterproofed using the splice kit
provided with all aftermarket AD-IP
™ air dryers.
4. Tie wrap or support all electrical wires leading to the
AD-IP ™ air dryer at 6 - 8 inch intervals.
Note: Wires should have sufficient slack and not
completely taught.
INSTALLING AD-IP ™ AIR DRYER WITH HOLSET
COMPRESSOR
GENERAL
The vehicle installation guidelines presented in the previous
section apply to all AD-IP
™ air dryer installations. Vehicles
equipped with the Holset Type E or QE compressor require
the following additional considerations.
Standard AD-IP ™ Air Dryer (Refer to Figure 3B)
If the AD-IP ™ air dryer is being installed on a vehicle that did
not previously have an air dryer or air system aftercooler, a
separate feedback line and single check valve must be
installed.
If the AD-IP ™ air dryer is replacing an older style air dryer or
air system aftercooler that did not incorporate an integral
“Turbo Cutoff” device, the Holset ECON valve must be
removed. The feedback line and single check valve must
remain in place.
AD-IP ™ DI “Drop In” Air Dryer Model (Refer to Figure 3C)
If the AD-IP ™ DI “Drop In” air dryer is being installed on a
vehicle that did not previously have an air dryer or air system
aftercooler, no additional considerations are necessary.
Install the AD-IP
™ DI drop in air dryer in the manner described
in the previous section.
If the AD-IP ™ DI drop in air dryer is replacing a standard
AD-IP ™ air dryer or air system aftercooler which incorporated
an integral “Turbo Cutoff” device, the old feedback line and
single check valve must be removed.
If the AD-IP ™ DI drop in air dryer is replacing an older style
air dryer or air system aftercooler that did not incorporate an
integral “Turbo Cutoff” device, the Holset ECON valve and
the old feedback line and single check valve must be
removed.