Connecting the AIR Lines, Purge Exhaust Line

	GOVERNOR	PURGE CONTROL
		PURGE CONTROL
		LINE TO CON PORT
		AD-IP®
		AIR
		DRYER
DISCHARGE
LINE TO SUP
PORT
HEATER &			SUPPLY RES.
THERMOSTAT
LEAD TO			DELIVERY LINE
IGNITION		HEATER &	FROM DEL PORT
SWITCH	FUSE	THERMOSTAT	ON AD-IP®AIR
10 AMP - 12 VOLT		LEAD TO	DRYER
5 AMP - 24 VOLT		GROUND

FIGURE 11 - BENDIX® AD-IP®AIR DRYER INSTALLATION

FRAME RAIL

STAR WASHER

1/4” or 3/8”

NUTEYELET

GROUND

LEAD

WEATHERPROOF

POWER LEAD

SPLICE

WIRE HARNESS

CONNECTOR

14 GAUGE POWER WIRE (TO AIR DRYER) FROM VEHICLE

FIGURE 12 - WIRING - REMOTE POWER & LOCAL

GROUND

CONNECTING THE AIR LINES

PURGE CONTROL LINE

1.Install a purge control air line having a minimum inside diameter of 3/16 inches between the Bendix® AD-IP®air dryer end cover control port and an unused unloader port on the governor. The control line must be connected directly to the governor and not in series with automatic drain valves, lubrication systems, etc.

2.The control line should slope downward to the end cover without forming sharp bends or “dips”.

COMPRESSOR DISCHARGE LINE

GENERAL:

Refer to Appendix A, Table A for recommended discharge line lengths and sizes for various vehicle applications and vocations.

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 inch (25.4 mm) I.D. hose can be clamped on the special AD-IP air dryer exhaust cover.

WIRING THE HEATER & THERMOSTAT (Refer to FIGURE 7)

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 needed for the installation of an AD-IP air dryer. 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 24 volt heaters.