INSTALLATION
Check the Electrical Grounding
(See Fig 1)
WARNING
Proper electrical grounding of every part of your
system is essential. For your safety, ground the system
as explained in your electrostatic gun manual. Then
check your system as explained below.
1.
Make sure the electrostatics are off.
Manual Spray Gun: Turn ES ON–OFF Lever to OFF.
Automatic Spray Gun: Turn off the turbine air.
2.
Have a qualified electrician check the electrical
grounding continuity of the spray gun and air hose.
a.
With the
electrically conductive air hose con-
nected and properly grounded, use a
megohmmeter to measure the resistance be-
tween the gun handle and a true earth ground
.
Use an applied voltage of 500 minimum to 1000
volts maximum. See Fig 2.
b.
If the resistance is greater than 2 megohms,
check the tightness of the ground connections,
and be sure the air supply hose ground wire is
connected to a true earth ground. If the resis-
tance is still greater than 2 megohms, replace
the air supply hose.
Using the Air Hose As A Single Hose Again
If an air hose with a trimmed ground wire is going to be
used as a single hose again, have a qualified electrician
splice the ground wire and grounding clamp back onto
the air hose ground wire.
If the original ground wire and clamp are not available,
order grounding clamp 103–538 and ground wire
208–950 and splice them onto the air hose ground wire.
Refer to Fig 3.
Connect the grounding clamp to a true earth ground.
Check the electrical grounding as instructed above.
Fig 2
Megohmmeter
Gun Han-
dle
True Earth
Ground
Grounded
Air Hose
Grounding Clamp 103–538
Ground Wire 208–950
25 ft. (7.6 m) long, 12 ga. (1.5 mm
)
Fig 3
103–538
208–950
TECHNICAL DATA
Pressure Drop Analysis Graph
This graph shows the pressure drop versus the hose
length for the Pro Series of electrostatic spray guns at a
2.8 bar (40 psi) gun inlet pressure.
Factory Branches: Atlanta, Chicago, Dallas, Detroit, Los Angeles, West Caldwell (N.J.)
Subsidiary and Affiliate Companies: Canada; England; Switzerland; France; Germany; Hong Kong; Japan
GRACO INC.
P.O. BOX 1441
MINNEAPOLIS, MN
55440–1441
PRINTED IN U.S.A.
308–075
8/90
