Graco PRO 3500WB, Manual

WARNINGS

SERIOUS BODILY INJURY, EXPLOSION, FIRE, OR ELECTRIC SHOCK CAN
OCCUR IF THE PRECAUTIONS BELOW ARE NOT FOLLOWED.

READ AND UNDERSTAND ALL INSTRUCTION MANUALS, TAGS, AND WARNING
LABELS BEFORE OPERATING EQUIPMENT.

ELECTROSTATIC EQUIPMENT SHALL ONLY BE USED BY TRAINED, QUALIFIED
PERSONNEL WHO SHALL BE FULLY CONVERSANT WITH THE REQUIREMENTS
STATED WITHIN THIS INSTRUCTION MANUAL.

FIRE, EXPLOSION, OR ELECTRIC SHOCK HAZARD

This system is designed to be used ONLY to dispense water-
base fluids, with flashpoints above 140

F (60

C) and less

than 20%, by weight, organic solvent concentration. When
spraying water-base fluid electrostatically, the entire fluid supply
is isolated from ground to maintain voltage at the tip of the gun.
To reduce the risk of fire, explosion, or electric shock, which may
result from electrical discharge:

Ground the electrostatic system.

Ground all personnel in or close to the spray area.

Ground all electrically conductive objects or devices in the
spray area, including paint containers, wash cans and tools.

Electrically connect a metal part of the fluid supply unit to the
voltage control.

Enclose the fluid supply in a safety fence that prohibits per-
sonnel from approaching the fluid supply before discharging
the system.

Do not touch the gun nozzle or come within 4 in. (101.6 mm)
of the nozzle during gun operation or for 30 seconds after op-
eration stops to allow the voltage to discharge through the
voltage control. It is recommended that the operator hold the
gun in hand or hang it in the gun holster during this 30 second
period. See ACCESSORIES to order the gun holster.

When operating the electrostatic gun, any ungrounded objects
in the spray area (such as people, containers, tools, etc.) can
become electrically charged. Arcing may occur if these objects
then come in contact or close to ground.

Static electricity can also be generated by flow of fluid through
the fluid supply unit, hose, gun, and nozzle, but it is dissipated
through proper grounding as described in Grounding, below.

If you experience any arcing or feel even a slight shock, STOP
SPRAYING IMMEDIATELY. Check for proper grounding of the
entire system. Be sure you have corrected the problem before
starting to spray again.

Grounding

The following are minimum requirements for grounding a basic
electrostatic system. Your system may include other equipment
or objects which must also be grounded. Always check your
local electrical code for detailed grounding instructions. Be sure
your system is connected to a true earth ground.
 

1.

Air compressors and hydraulic power supplies: ground
according to the manufacturer’s recommendations.

2.

Gun Air Supply Hose: use ONLY Graco Electrically Con-
ductive Air Supply Hose as specified in this manual; see
the ACCESSORIES section to order. Connect the air hose
ground cable to a true earth ground.

3.

Electrostatic Air Spray Gun: obtain grounding through con-
nection to a properly grounded Graco Electrically Conduc-
tive Air Supply Hose.

4.

Voltage Control: electrically connect to a true earth ground.

5.

Safety Fence: electrically connect to a true earth ground.

6.

Grounding Rod: electrically connect to a true earth ground.

7.

Object being sprayed: keep the work piece hangers clean
and grounded at all times. Contact points must be sharp
points or knife edges.

8.

All persons entering the spray area: shoes must have con-
ductive soles, such as leather, and personal grounding
straps must be worn. Rubber or plastic soles are not con-
ductive. The operator must not wear gloves which insulate
the hand from the spray gun. The gloves must be conduc-
tive or modified as shown on page 12.

9.

The floor of the spray area must be electrically conductive
and grounded. Do not cover the floor with cardboard or any
non-conductive material which would interrupt grounding
continuity.

10.

All electrically conductive objects or devices in the spray
area, including paint containers and wash cans, must be
properly grounded.

11.

All solvent pails: use only grounded metal pails, which are
conductive. Do not place the pail on any non-conductive
surface, such as cardboard or paper, which would interrupt
grounding continuity.

Isolate High Voltage Equipment

The fluid supply MUST be isolated from all personnel. Place a
safety fence around the fluid supply to ensure it is safely iso-
lated. A 

safety fence air line interlock MUST be installed to shut

off the high voltage anytime the gate is opened. See the TYPI-
CAL INSTALLATION drawing and read and follow the
INSTALLATION instructions.