Graco 3A2497BPro User Manual download pdf (Page 15)

Installation

System Requirements

AGracovolta

ge isolation system must have the

following fe

atures:

• An isolation enclosure that prevents persons from

making contact with the high voltage components

before the system voltage is discharged. All

components of the isolation system that are

charged to high voltage must be contained within

the enclosure.

• A bleed resistor to drain off the system voltage

when the spray gun is not in use. A metal part of

the ﬂuid supply unit must be electrically connected

to the bleed resistor.

• A safety interlock that automatically discharges the

system voltage when anyone opens the isolation

enclosure.

NOTICE

The system should not have any severe arcing

occurring when the isolation mechanism opens

and closes. Severe arcing will shorten the life of

the system components.

NOTE: The Graco warranty and approvals are

void if the electrostatic spray gun is connected to a

non-Graco voltage isolation system or if the gun is

operated above 60 kV.

Warning Sign

Mount warning signs in the spray area where they

can easily be seen and read by all operators. An

English Warning Sign is provided with the gun.

Install the System

Installing and servicing this equipment requires

access to parts which may cause electric shock

or other serious injury if work is not performed

properly.

• Do not install or service this equipment unless

you are trained and qualiﬁed.

• Be sure your installation complies with local,

state, and national codes for the installation

of electrical apparatus in a Class I, Div. I

Hazardous Location or Group II, Zone I

Explosive Atmosphere Location.

• Comply with all applicable local, state, and

national ﬁre, electrical, and other safety

regulations.

Fig. 12 shows a typical electrostatic air-assisted

spray system. It is not an actual system design.

For assistance in designing a system to suit your

particular needs, contact your Graco distributor.

Ventilate the Spray Booth

Provide fresh air ventilation to reduce the risk of ﬁre

or explosion caused by the buildup of ﬂammable or

toxic vapors when spraying, ﬂushing, or cleaning

the gun. Do not operate the gun unless ventilation

fans are operating.

Check and follow all local, state, and national codes

regarding air exhaust velocity requirements.

Hig

h velocity air exhaust will decrease the operating

ﬁciency of the electrostatic system. The minimum

lowable air exhaust velocity is 60 linear ft/min (18.3

near meters/minute).

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Graco 3A2497BPro User Manual Page 15

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