Check
Check
Check Gun
Gun
Gun Electrical
Electrical
Electrical Grounding
Grounding
Grounding
Megohmmeter Part No. 241079 (AA-see Fig.
21) 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 air
hose.
2.
Turn OFF (O) the ES On-Off switch.
3.
Turn off the air and fluid supply to the gun. Follow
the
Pressure Relief Procedure, page 39
. The
fluid hose must not have any fluid in it.
4.
Disconnect the fluid hose.
5.
Make sure the red-colored grounded air hose
(AH) is connected and the hose ground wire is
connected to a true earth ground.
6.
Measure the resistance between the gun handle
(BB) and a true earth ground (CC). Use an
applied voltage of 500 minimum to 1000 volts
maximum. The resistance should not exceed
100 ohms. See Fig. 22.
7.
If the resistance is greater than 100 ohms, check
the tightness of the ground connections and be
sure the air hose ground wire is connected to a
true earth ground. If the resistance is still too
high, replace the air hose.
Figure 23 Check Gun Electrical Grounding
8.
Using an ohmmeter (AA) measure the resistance
between the cabinet ground lug (214) and a true
earth ground (CC). The resistance must be less
than 100 ohms.
Figure 24 Check Cabinet Grounding
Flush
Flush
Flush Before
Before
Before Using
Using
Using Equipment
Equipment
Equipment
The equipment was tested in fluid at the factory. To
avoid contaminating your fluid, flush the equipment
with a compatible solvent before using the equipment.
See
38
3A2496H
