Kussmaul Electronics 091-9HP - Manual (Page 2)

INTRODUCTION
The 091-9HP Auto-Pump Air Compressor system is a 120 volt 50/60 Hz split capacitor
A.C. motor operating a single cylinder air compressor designed specifically for installation
on vehicles with air brakes. During long idle periods of the vehicle when even the slight-
est seepage can cause an air brake system pressure to drop below the brake lockup
pressure, the Auto Pump automatically starts to maintain the pressure.
The Auto Pump motor is directly coupled to the compressor section eliminating all belts
and pulleys assuring long life and reliable operation. A heavy duty pressure switch is
adjusted to start the compressor when the system pressure drops below 110 psi and
stops the compressor when 125 psi is attained. The pressure switch is adjustable.
A moisture trap is mounted on the Auto Pump. This captures any condensate which re-
sults from compressing the air. CONDENSATE MUST BE DRAINED WEEKLY.
Please read and follow the installation instructions carefully . The Auto Pump requires no
routine maintenance EXCEPT FOR DRAINING THE MOISTURE TRAP. A careful installa-
tion will assure years of trouble free operation.
NOTE
THIS PUMP REQUIRES A MINIMUM OF 120 VAC FOR
OPERATION. AT LOWER VOLTAGES THE PUMP MAY NOT START