INSTRUCTIONS–PARTS LIST
308–075
This manual contains IMPORTANT
WARNINGS AND INSTRUCTIONS
READ AND RETAIN 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 SPRAYING IMMEDIATELY. 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.
