Sullair Air-Cooled Compressor 10B 25HP-251335-003 AC

Warning: This procedure requires trained personnel with PPE!

Adjust Control System with a desired operating range of 115 to 125 PSIG (792 to 862kPa). Differential is the difference between the high and low pressure settings. 10 PSIG (7kPa) is typical

Remove cover to pressure switch

Turn the range adjusting screw to the high pressure setting. Turning the screw counterclock-wise lowers both the high and low pressure equally

Differential is the difference between the high and low pressure settings. 10 PSIG (7kPa) is typical

Turn the differential adjusting screw to the lower (reset) setting. Turning the screw counterclock- wise widens the differential by lowering the reset (lower) setting only

When the pressure switch adjustment is complete, the pressure regulator should be adjusted for the pressure at which modulation of air delivery should begin. In this case that pressure will be 118 PSIG (824kPa). The regulator is adjusted by loosening the jam nut on the end of the cone shaped cover of the pressure regulator. When the jam nut is loose, turn the adjusting screw clockwise to increase or counterclockwise to decrease the setting

To set the regulator, continue closing the service valve, until the line pressure is 118 PSIG (824kPa). At this point regulator should pass a signal to the inlet valve to start closing it. If the line pressure keeps on rising or if the modulation does not begin, adjust the regulator valve as de- scribed above. After adjustment line pressure should be approximately 118 PSIG (824kPa) and 1.00 in. Hg vacuum below the inlet

Now close the service valve, line pressure will start rising. When line pressure reaches 125 lbs., the inlet valve will be closed to its maximum position. The inlet vacuum at this point will be around 25 in. Hg. The machine should unload at this point

Warning: This maintenance check requires trained personnel with PPE!

Remove the appropriate piping from the thermal valve housing

Remove the four (4) capscrews holding the housing together and separate the upper housing from the lower housing

Remove and replace the element seal in the upper housing

Remove and replace the o-ring between the upper and lower housings

Sign off on the thermal valve maintenance

Place a bright light inside the element to inspect for damage or leak holes. Concentrated light will shine through the element and disclose any holes

Inspect all gaskets and gasket contact surfaces of the housing. Should faulty gaskets be evident, correct the condition immediately

If the clean element is to be stored for later use, it must be stored in a clean container

After the element has been installed, inspect and tighten all air inlet connections prior to resuming operation

Sign off on the air filter element inspection

Repair pressure regulator valve 250017-280, use repair kit 250019-453

Loosen the locknut and turn the adjusting screw counterclockwise until the inner spring tension is relieved. The adjusting screw should turn freely when the spring tension is relieved

Remove the spring chamber from the body to allow access to internal parts

Remove the spring button and the spring. The dampener will stay inside the spring as it is removed. Leave the dampener inside the spring as there is no need to remove it

After removing the spring, remove the gasket stop and brass gasket

Remove the pressure plate nut and disassemble the pressure plate, diaphragm, diaphragm gasket (rubberized asbestos), seat disc and seat gasket

Remove and discard the seat ring

Reassemble the regulator using the new parts provided in the repair kit

Reassemble the diaphragm, pressure plate, gasket, seat disc, and seat disc gasket and tighten the nut. All of these parts with the exception of the pressure plate are provided in the repair kit

Enter the part number of the coil

Yoke containing the coil and sleeves slipped off the solenoid base sub-assembly

Reassembled in reverse order of disassembly

Sign off on the compressor coil maintenance