Craftsman 919.728000, D21245 Extension Cords, Piping, Additional Regulators and Controls

Certain air compressors can be converted from 120V to 240V operation. When converting an air compressor to 240V operation, the attached three-prong 120V cord assembly must be replaced with a three-pronged 240V cord assembly that can be purchased through a Sears Service Center.

Some models have a dual voltage motor, 120 and 240 volt. They are wired for 120 volt but can be converted to 240 volt operation. Instructions for connecting the motor for operation at 240 volt can be found printed on the label attached to the side of the motor.

Certain air compressor models can be operated on a 15 amp circuit if:

1.Voltage supply to circuit is normal.

2.Circuit is not used to supply any other electrical needs (lights, appliances, etc.)

3.Extension cords comply with specifications in this manual.

4.Circuit is equipped with a 15 amp circuit breaker or 15 amp time delay fuse.

Extension Cords

To avoid voltage drop and power loss to the motor, and to prevent overheating, use extra air hose instead of an extension cord.

If an extension cord must be used:

•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 extension cord.

•make sure the extension cord is in good condition.

•the extension cord should be no longer than 50 feet.

•the minimum wire size is 12 gauge (AWG). (Wire size increases as gauge number decreases. 10 AWG and 8 AWG may also be used. DO NOT USE 14 AWG or 16 AWG.)

Piping

Plastic or PVC pipe is not designed for use with compressed air. Regardless of its indicated pressure rating, plastic pipe can burst from air pressure. Use only metal pipe for air distribution lines.

If a pipe line is necessary, use pipe that is the same size as the air tank outlet. Piping that is too small will restrict the flow of air. If piping is over 100 feet long, use the next larger size. Bury underground lines below the frost line and avoid pockets where condensation

can gather and freeze. Apply pressure before under- ground lines are covered to make sure all pipe joints are free of leaks.

Connect the piping to the 3/8" NPT air outlet opening at the end of the air tank.

Additional Regulators and Controls

Since the air tank pressure is usually greater than that which is needed, a separate regulator is employed to control the air pressure ahead of any individual air driven device.

Separate air transformers which combine the function of air regulation, moisture and dirt removal should be used where applicable.

Break-in Procedure

Serious damage may result if the following break-in instructions are not closely fol- lowed.

This procedure is required only once, before the air com- pressor is put into service.

1.Set the pressure switch "AUTO/O" lever in the "O" position for "Off".

2.Plug the power cord into the correct branch circuit receptacle.

3.Do not attach hose to outlet. Leave the outlet open to the atmosphere.

4.Turn the regulator clockwise, opening it fully, to prevent air pressure build-up in the tank.

5.Move the "AUTO/O" lever to "AUTO". The com- pressor will start.

6.RUN THE COMPRESSOR FOR 30 MINUTES. Make sure the regulator is open and there is no tank pressure build-up.

7.After 30 minutes, close the regulator by turning it counterclockwise. The air tank will fill to cut-out pressure and then the motor will stop.

D21245 10 — ENG