Graco 3A1163A important safety instructions Grounding, Check Resistance

Grounding

Your system must be grounded. Read Warnings, page 6. For intrinsic safety, ground wires for the EasyKey, Fluid Station, and Gun Flush Box must all be connected to the same true earth ground. See FIG. 14, page 28.

Ground the ProControl system as instructed here and in the individual component manuals. A ground wire and clamp, part no. 223547, is available from Graco.

NOTE: To prevent electrical noise interference from high voltage equipment, do not connect the robot ground to the same ground point used by these ProControl com- ponents.

NOTE: Different ground points (unequal potential) may cause current to flow through component cables, caus- ing incorrect signals.

EasyKey

Connect a ground wire from the EasyKey ground screw to a true earth ground. FIG. 14.

Gun Flush Box (Manual or Semi-automatic mode only)

Connect a ground wire from the Gun Flush Box ground lug to a true earth ground. FIG. 14.

Wall Mount Fluid Station

Connect a ground wire from the Wall Mount Fluid Sta- tion ground screw to a true earth ground. FIG. 14.

Color Change Module

Connect a ground wire from the Color Change Module ground screw to a true earth ground. A ground wire and clamp, part no. 223547, is available from Graco. FIG. 14.

Flow Meters

Connect the meter cables as shown in the System Electrical Schematic Hazardous Area on page 31. Failure to properly connect the shield may cause incor- rect signals.

Electrical

Feed Pumps or Pressure Pots

Connect a ground wire and clamp from a true earth ground to the pumps or pots. See pump or pressure pot manual.

Air and Fluid Hoses

Use grounded hoses only.

Spray Gun

Follow the grounding instructions in your gun manual.

Fluid Supply Container

Follow local code.

Object Being Sprayed

Follow local code.

All Solvent Pails Used When Purging

Follow local code. Use only conductive metal pails/con- tainers placed on a grounded surface. Do not place the pail/container on a nonconductive surface, such as paper or cardboard, which interrupts the grounding con- tinuity.

Check Resistance

To ensure proper grounding, resistance between Pro- Mix components and true earth ground must be less than 1 ohm. Read Warnings, page 6.

Have a qualified electrician check resistance between each ProControl component and true earth ground. If resistance is greater than 1 ohm, a different ground site may be required. Do not operate the system until the problem is corrected.

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