Check The Electrical Grounding - Graco PRO AA5500SC Instruction Manual

Check the Electrical Grounding (See Fig. 10)
WARNING
FIRE, EXPLOSION, AND
ELECTRIC SHOCK HAZARD
Megohmmeter P/N 241079 (WW-see
Fig. 10) 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:
D The gun has been removed from the
hazardous area;
D 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 con-
tainers or fumes from spraying).
Failure to follow this warning could cause fire,
explosion, 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 turbine
air hose.
2. Make sure the turbine air hose (B) is connected
and the hose ground wire is connected to a true
earth ground.
3. The air and fluid supplies to the gun must be
turned off, and the fluid hose must not have any
fluid in it when checking the continuity.
4. Measure the resistance between the turbine air
inlet fitting (TA) and a true earth ground (N).
14 308387
Installation
a. If using a black or grey turbine air hose, use a
b. If you are using a red turbine air hose, use an
5. If the resistance is greater than the maximum
reading specified above for your hose, 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.
Fig. 10
megohmmeter (WW) to measure the
resistance. Use an applied voltage of 500
minimum to 1000 volts maximum. Resistance
should not exceed 2 megohms.
ohmmeter to measure the resistance.
Resistance should not exceed 100 ohms.
WW
N
TA
B
TI0376