Grounding; Check Resistance - Graco Aerobotix RC50 Instructions Manual

Installation

Grounding

• Do not run wires around the Intrinsically Safe
Barrier (DA) instead of through the barrier as this
will impair intrinsic safety. See F
• See grounding procedure and related warnings in
supplied manuals. See Related Manuals on
page 3.
For Intrinsic Safety
The equipment must be grounded. Grounding reduces
the risk of static and electric shock by providing an
escape wire for the electrical current due to static build
up or in the event of a short circuit.
Ground wires from the pumps must be connected to the
same true earth ground. See F
Ground the system as described here and in the individ-
ual component manuals. A ground wire and clamp, part
number 223547, is available from Graco.
Main Control Panel
Connect a ground wire to a true earth ground.
Machine Junction Box
Connect a ground wire to a true earth ground.
Flow Meters
The Volumetric Flow Meters (AC)are grounded through
the power cable connection to the Machine Junction
Box (AD).
Heaters
Connect a ground wire to a true earth ground through
main control panel. See U80638 schematic.
Pumpline Motors
Connect a ground wire to a true earth ground through
main control panel. See U80638 schematic.
Agitator Motors
Connect a ground wire to a true earth ground through
main control panel. See U80638 schematic.
14
. 3 on page 10.
IG
. 5, page 15.
IG
Module Applicator Group
Connect a ground wire to a true earth ground.
Air and Fluid Hoses
Use grounded hoses only.

Check Resistance

To ensure proper grounding, resistance between com-
ponents and true earth ground must be less than
1 ohm.
Have a qualified electrician check resistance between
each component and true earth ground. If resistance is
greater than 1 ohm, a different ground site may be
required. Do not operate the system until the problem is
corrected.
313813A