Check Electrical Grounding - Graco 333013B Instructions - Parts Manual

• All electrically conductive objects or devices in the
spray area: including fluid containers and wash
cans, must be properly grounded.
• Fluid and waste containers: ground all fluid and
waste containers in the spray area. Do not use pail
liners unless they are conductive and grounded.
When flushing the spray gun, the container used to
catch the excess fluid must be electrically conduc-
tive and grounded.
• All solvent pails: use only approved, grounded metal
containers, which are conductive. Do not use plastic
containers. Use only non-flammable solvents. Do
not store more than the quantity needed for one
shift.

Check Electrical Grounding

Megohmmeter Part No. 241079 (AA-see F
is not approved for use in a hazardous area. To
reduce the risk of sparking, do not use the
megohmmeter to check electrical grounding unless:
• The gun has been removed from the hazardous
area;
• Or all spraying devices in the hazardous area are
turned off, ventilation fans in the hazardous area
are operating, and there are no flammable vapors
in the area (such as open solvent containers or
fumes from spraying).
Failure to follow this warning could cause fire,
explosion, and electric shock and result in serious
injury and property damage.
Graco Part No. 241079 Megohmmeter is available as an
accessory to check that the gun is properly grounded.
1. Have a qualified electrician check the electrical
grounding continuity of the spray gun and turbine air
hose.
2. Make sure the red-colored turbine air hose (B) is
connected and the hose ground wire is connected to
a true earth ground.
3. Turn off the air and fluid supply to the gun. Follow
the Pressure Relief Procedure, page 22. The fluid
hose must not have any fluid in it.
333013B
4. Measure the resistance between the turbine air inlet
fitting (TA) and a true earth ground (N). If the resis-
tance is greater than 100 ohms, check the tightness
of the ground connections and be sure the turbine
air hose ground wire is connected to a true earth
ground. If the resistance is still too high, replace the
turbine air hose
AA
11)
IGURE
Fig. 11. Check Gun Grounding
5. If using the WB3000 use an ohmmeter (AA) mea-
sure the resistance between the cabinet ground lug
(214) and a true earth ground (CC). The resistance
must be less than 100 ohms.
F . 12 . Check Cabinet Grounding
IG
N
B
214
AA
Installation
TA
CC
19