Graco 185-493 Datasheet

INSTRUCTIONS–P ARTS LIST 308–075
This manual contains IMPORT ANT
W
ARNINGS AND INSTRUCTIONS
READ AND RET AIN FOR REFERENCE
Rev. A
Grounded Gun
AIR SUPPLY HOSE ADAPTER
Part No. 185–493
For use with the electrostatic spray gun grounded air sup -
ply hoses. Allows conductive air hoses to be coupled
while maintaining the continuity that is necessary
between
the hoses.
NOTE: This adapter has not been tested by the Cana-
dian Standards Association or Factory Mutual.
Installing
this adaptor voids previous CSA certifi -
cation
and/or FM approval.
WARNING
Grounding
To reduce the risk of fire, explosion, or electric shock, which
may result from electrical discharge, it is essential that all
parts
of the electrostatic system are properly grounded. Stat -
ic
electricity can be generated by the flow of fluid through the
pump, hose, gun, and nozzle, but it is dissipated through
proper grounding as described in the spray gun instruction
manual.
The
electrostatic spray gun is grounded through connection
to a properly grounded air supply hose. Use only the Graco
Electrically Conductive Air Supply Hose. Connect the air
hose
ground wire to a true earth ground.
If you experience any arcing or feel even a slight shock,
STOP
SPRA YING IMMEDIA TELY . Check for proper ground -
ing of the entire system. Be sure you have corrected the
problem
before starting to spray again.
Relieving Fluid & Air Pressures
To reduce the risk of serious bodily injury , including splashing
in the eyes or on the skin, fluid injection (air -assisted airless
system), injury from moving parts or electric shock, follow the
Pressure Relief Procedure as instructed in your electro-
static
spray gun manual.
INSTALLATION
1. Connect the hose adapter between the ends of the
air
hoses as shown in Fig 1.
NOTE: The recommended maximum total length of air
hose is 100 ft (30.5 m). The pressure drop
through longer lengths may lower the voltage
from
the power supply . A minimum of 2.8 bar (40
psi) air supply pressure is required to ensure full
voltage from the power supply .
2. On
all but the last air hose (the one closest to the air
supply), trim the grounding wire to approximately 4
inches (102 mm). Secure the grounding wire to the
air hose outer jacket with electrical tape. Keep the
extra
wires and clamp(s).
3. Connect the grounding clamp of the last air hose to a
true earth ground.
Fig 1
185–493
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
 COPYRIGHT 1990 GRACO INC.


INSTALLATION
Check the Electrical Grounding (See Fig 1)
WARNING
Proper electrical grounding of every part of your
system i s e ssential . F o r y ou r s afety , g roun d t h e s ystem
as explained in your electrostatic gun manual. Then
check
y our syste m a s e xplaine d b elow.
1.
Make sure the electrostatics are off.
Manual Spray Gun: T urn ES ON–OFF Lever to OFF .
Automatic Spray Gun: T urn of f 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 DA TA
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, W est 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