STEMCO Aeris - Manual (Page 7)

Aeris Installation and Service Manual
Page 7 of 42
System Operation
How System Works
• The Aeris tire inflation system is designed to continuously supply filtered, regulated compressed air to
each tire on the trailer. There is no operation required of the driver for the system to function normally.
The only requirement of the driver is to verify the indicator lamp is functioning and to monitor the system
periodically.
• The Aeris system is preset to maintain a specific tire pressure in each tire. The pressure in the trailer’s air
tank must be maintained above the targeted pressure to allow the controller to continuously supply and
maintain the preset tire pressure to all tires.
IMPORTANT: For Aeris controller to operate properly the air tank pressure must be greater than the
tire pressure target. The controller cannot supply tire pressure above the air tank pressure.
• When the system is operating properly, the air tank will supply pressurized air to the Aeris controller. The
controller will supply regulated compressed air to the airlines going to each tire. If a tire is low, air from
the trailer air tank will inflate the tire until the targeted tire pressure is achieved. Regulated air flowing
from the controller to the airlines and tires may cause the indicator light to remain on until the target
pressure is reached. Constant pressure remains and is maintained in air lines and tires at the targeted
pressure.
• If a tire is leaking or there is a leak in the lines, the indicator light may illuminate and stay on. If the
indicator light stays on for more than 10 minutes, the system is attempting to inflate the tire or trying to
correct for the airline loss to the targeted air pressure. If this happens, the operator should stop and
check the tires manually to determine if it’s safe to continue to operate the vehicle. Operator should
seek service at the next available opportunity.
• Remaining tires are protected from pressure loss by check valves integrated into each tire hose.
System Components List

Hubcaps

Spindle plug driver and plugs

Air lines and fittings

Light indicator and electrical wiring

Control box with regulator and filter

Control box mounting bracket

Flexible wiring conduit

Hardware kit