Improper installation of the grounding plug will result in a risk of electric shock. If repair or replacement of the cord or plug is necessary, do not connect the grounding wire to either flat blade terminal. The wire with insulation having an outer surface that is green with or without yellow stripes is the grounding wire. Check with a qualified electrician or serviceman if the grounding instructions are not completely understood, or if in doubt as to whether the product is properly grounded. Do not modify the plug provided; if it will not fit the outlet, have the proper outlet installed by a qualified electrician.

This product is for use on a circuit having a nominal rating of 120 volts and is factory-equipped with a specific electric cord and plug to permit connection to a proper electric circuit. Make sure that the product is connected to an outlet having the same configuration as the plug. No adapter should be used with this product. If the product must be reconnected for use on a different type of electric circuit, qualified service personnel should make the reconnection.

Extension Cords

Use only a 3-wire extension cord that has a 3-blade grounding plug, and a 3-slot receptacle that will accept the plug on the product. Make sure your extension cord is in good condition. When using an extension cord, be sure to use one heavy enough to carry the current your prod- uct will draw. Cords must not exceed 25 feet and No. 12 AWG size must be used. An undersized cord will cause a

drop in line voltage resulting in loss of power and over- heating.

Break In Procedures

No break in procedure is required by the user. This product is factory tested to ensure proper operation and performance.

Operating Procedures

Daily Start-UpProcedures

1.Set the Auto-On/Off lever to the Off position.

2.Check the air compressor visually for any damage or obstruction.

3.Close the drain valve,

4.Check the oil level of the pump.

5.Connect the air hose to the quick connect socket on the regulator assembly by inserting the quick connect plug on the air hose into the quick connect socket. The quick connect socket collar will snap forward and lock the plug into place providing an air tight seal between the socket and plug. To leiease tile ah ilu_u push th_ collar back on the quick connect socket.

6.Plug the power cord into the proper receptacle.

7.Turn the Auto-On/Off lever to the On-Auto position and the compressor will start and build air pressure in the tank to cut-out pressure and then shut off automatically.

8.Adjust the regulator to a PSI setting that is needed for your application and be sure it is within the safety standards required to perform the task. If using a pneumatic tool, the manufacturer should have recom- mendations in the manual for that particular tool on operating PSI settings.

9.The air compressor is now ready for use. The following inflation and cleaning accessories packaged with this unit should only be operated at maximum pressure of 20-30 PSI: blow gun, tapered nozzle, inflation needles, wire brush adapter, blow gun adapter.

Daily Shut-DownProcedures

1.Set the Auto-On/Off lever to the Off position.

2.Unplug the power cord from the receptacle.

3.Set the outlet pressure to zero on the regulator.

4.Remove any air tools or accessories. When draining the tank, always use ear and eye protection. Drain the tank in a suitable location; condensation will be present in most cases of draining.

5.Open the drain valve allowing air to bleed from the tank. After all of the air has bled from the tank, close the drain valve to prevent debris buildup in the valve.

When draining the tank, always use ear and eye protection. Drain the tank in a suitable location; condensation will be present in most cases of draining.

Water that remains in the tank during storage will corrode and weaken the air tank which could cause the tank to

rupture. To avoid serious injury, be sure to drain the tank after each use or daily.

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Craftsman 921.1521 owner manual Break In Procedures, Daily Start-UpProcedures, Daily Shut-DownProcedures
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921.1521 specifications

The Craftsman 921.1521 is a powerful and versatile tool that has garnered attention among DIY enthusiasts and professionals alike. This air compressor is designed to tackle a variety of tasks, making it an essential addition to any workshop or garage. With its robust features and advanced technologies, the 921.1521 stands out in its category.

One of the key features of the Craftsman 921.1521 is its impressive power output. This air compressor is equipped with a 1.5-horsepower motor, providing a substantial amount of air pressure for a wide range of applications. It has a maximum pressure of 150 PSI, which allows it to handle demanding tasks such as powering nail guns, spray painting, and inflating tires with ease.

Additionally, the 921.1521 is designed with a 6-gallon tank, which ensures a steady air supply for longer periods of use. This feature minimizes downtime, allowing users to complete their projects more efficiently. The tank is also constructed from high-quality materials, ensuring durability and longevity over time.

Portability is another significant aspect of the Craftsman 921.1521. It features a lightweight design coupled with a convenient handle, making it easy to transport from one job site to another. The compressor also comes equipped with rubber feet that provide stability during operation, ensuring safety and reducing vibrations.

The Craftsman 921.1521 incorporates user-friendly technologies, such as an automatic shut-off feature that helps prevent over-pressurization. This not only protects the compressor but also enhances user safety. Furthermore, maintenance is straightforward, with easy access to all essential components for routine checks and upkeep.

Another notable characteristic of the 921.1521 is its noise reduction capabilities. With noise levels significantly lower than many competitors, it is suitable for use in residential areas without disturbing neighbors. This feature makes it ideal for home improvement projects and other tasks where noise may be a concern.

In conclusion, the Craftsman 921.1521 air compressor is a powerful, portable, and versatile tool equipped with essential features and technologies that cater to a wide range of tasks. Its combination of strength, efficiency, and ease of use makes it an excellent choice for both DIYers and professionals seeking reliable performance in their projects. Whether inflating tires, powering tools, or completing home improvement tasks, the Craftsman 921.1521 stands ready to meet the challenge.
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