Check Electrical Grounding - Graco PRO 244572 Instructions-Parts List Manual

Check Electrical Grounding

WARNING
Fire, Explosion, and Electric Shock
Hazard
Megohmmeter Part No. 241079 (AA-see
F . 3.) is not approved for use in a hazard-
IG
ous area. To reduce the risk of sparking, do
not use the megohmmeter to check electri-
cal 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.
1. Have a qualified electrician check the electrical
grounding continuity of the spray gun and air hose.
2. Turn the ES ON/OFF valve OFF.
309295L
3. Turn off the air and fluid supply to the gun. The fluid
hose must not have any fluid in it.
4. Make sure the grounded air hose (R) is connected
and the hose ground wire is connected to a true
earth ground.
5. 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 1 megohm. See
F . 3.
IG
6. If the resistance is greater than 1 megohm, 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.
AA
ES
I O
ti1337a
Fig. 3. Check Gun Grounding
Installation
ti1259a
BB
CC
ti1340a
13