Check Electrical Grounding - Graco 244592 Instructions-Parts List Manual

Installation

Check Electrical Grounding

WARNING
Fire, Explosion, and Electric Shock Hazard
Megohmmeter Part No. 241079 (AA-see
F . 8.) 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 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. Turn off the air and fluid supply to the gun.
16
4. Measure the resistance between the turbine air inlet
fitting (TA) and a true earth ground (N).
a. If using a black or grey turbine air hose, use a
megohmmeter to measure the resistance. Use
an applied voltage of 500 minimum to 1000
volts maximum. The resistance should not
exceed 1 megohm.
b. If using a red turbine air hose, use an ohmmeter
to measure the resistance. The resistance
should not exceed 100 ohms.
3. If the resistance is greater than the maximum read-
ing specified above for your hose, check the tight-
ness 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.
N
B
Fig. 8. Check Gun Grounding
AA
TA
TI1735A
309298J