13-8-620 Page 18
WARNING
Operation of the unit with improper relief valve setting can result in severe
personal injury or machine damage. Ensure properly set valves are installed
and maintained.
Figure 4-1 – CONTROL SCHEMATIC
AIR CONTROL COMPONENTS
- All units incorporate the following air control components. See Figure
4-1 for schematic tubing diagram.
Inlet Valve
- The inlet valve is a normally opened, pneumatically closed valve. The inlet valve is
controlled by a solenoid valve, which in turn is controlled by the AutoSentry T controller, The inlet valve
closes to unload the compressor and opens to load the compressor. At shutdown the inlet valve closes to
function as a check valve and to prevent the backflow of air and oil. The seals will need to be replaced
periodically. The interval will depend on the environment and the operating conditions.
Solenoid Valve
(Figure 4-1) - The solenoid valve is operated by the controller. When energized, the
valve closes, the inlet valve opens and the package starts compressing air. When the solenoid valve is
de-energized, it closes the inlet valve and relieves the pressure in the reservoir.
Minimum Pressure/Check Valve
(Figure 5-4, page 30) - An internal spring-loaded minimum pressure
valve is installed prior to the aftercooler to maintain a positive pressure on the oil system even when the
air service valve is fully open. This valve senses upstream pressure. If demand for air exceeds the
compressor capacity, the valve throttles the flow to maintain a minimum pressure on the upstream (oil
reservoir) side of the valve. When pressure rises above the minimum pressure (standard setting 40 to 45
PSIG) the valve reaches the full open position.
A check valve incorporated in the minimum pressure valve prevents backflow of air from the shop air line
when the unit stops, unloads or is shut down.
302EBA797-C
(Ref. Drawing)
Summary of Contents for CHAMPION ROTORCHAMP EFB99B
Page 9: ...13 8 620 Page 2 13 8 620 Page 2 300EFB797 A Ref Drawing Figure 1 2 COMPRESSOR ILLUSTRATION...
Page 12: ...13 8 620 Page 5 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 13: ...13 8 620 Page 6 DECALS 216EAQ077 217EAQ077 222EAQ077 221EAQ077 208EAQ077...
Page 30: ...13 8 620 Page 23 Figure 4 3 WIRING DIAGRAM 300EFB542 D Ref Drawing...
