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S Y S T E M C O N T R O L S
(1) SAFETY-RELIEF VALVE Every ROLAIR air compressor is equipped with a safety-relief valve which is designed to discharge tank
pressure at a predetermined setting when a systems failure occurs. Check the safety valve periodically by pulling on the ring only
when the tank pressure is completely drained. The spring loaded valve should move freely within the safety valve body. An
inoperable safety valve could allow an excessive amount of tank pressure to build causing the air tank to catastrophically rupture
or
explode.
Do not tamper with or attempt to eliminate the safety relief valve.
(2) MANUAL OVERLOAD / MOTOR RESET Every ROLAIR electric air compressor is built with manual overload protection. If the motor
overheats, the overload sensor will
trip
the reset button to protect the motor. If this occurs, please allow the motor to cool for
approximately five minutes. Locate and push in the reset button. The use of an undersized or excessive length of extension cord
may be the cause of overheating. Re-evaluate the power source and gauge/length of extension cord being used. (Refer to chart
on page 8)
(3) PRESSURE SWITCH Most electric air compressors are operated by the use of a pressure switch. Always make sure the lever
is in the “Off” position before plugging in the power cord. By moving the lever to the “On/Auto” position, the compressor will start
and stop automatically within the settings of the pressure switch which are typically 105 – 130 PSI. Do not attempt to stop the
compressor by unplugging the power cord. To stop, simply move the lever to the “Off” position. The lever operates a relief valve
that dumps off head pressure and allows the compressor to restart without load the next time it is used.
(4) REGULATOR – WORKING PRESSURE
To adjust the output/line pressure, simply lift up on the regulator adjustment knob and rotate
clockwise to increase working pressure or counterclockwise to decrease. Push adjustment knob back down to lock in setting.
Never exceed the manufacturer’s maximum allowable pressure rating of the tool being used or item being inflated.
(5) PRESSURE GAUGE(S) Typically, most compressors are designed with a gauge to measure tank or storage pressure and
another gauge attached to the regulator that indicates output or working pressure.
(6) DRAIN VALVE(S) One or more drain valves are installed to allow moisture to be drained on a daily basis from the compressor
storage tank(s). Open drains carefully and slowly to prevent scale, rust, or debris from becoming expelled at a high rate of speed.
(7) AIR INTAKE FILTER Air intake filters are installed to prevent foreign matter from entering the engine or compressor pump.
Check intake elements on a regular basis and either clean or replace as needed. Warm soapy water or low compressed air may
be used to clean the elements. Check intake canisters or elbow components for cracks or broken seals and replace if structural
problems are found.
