13
308219
Installation
7.
Ground the System
WARNING
FIRE, EXPLOSION, AND ELECTRIC
SHOCK HAZARD
Before operating the heater, ground the
system as explained below. Also read
the section
FIRE, EXPLOSION, AND
ELECTRIC SHOCK HAZARD
on
page 5.
The following are minimum requirements for grounding
a basic system. Your system may include other equip-
ment or objects which must be grounded. Check your
local electrical code for detailed grounding instructions.
Your system must be connected to a true earth
ground.
1.
Heater:
wire the heater to a positively grounded
power supply. The heater is grounded through the
electrical wiring to a grounding screw (227) in the
junction box base (228). See Fig. 5.
Redundant grounding is recommended to further
reduce the risk of electric shock. The long lines of
the shielded-wire heated hose have higher than
normal capacitive leakage current to ground.
In a mobile installation, be sure the truck or trailer
is grounded to a true earth ground.
2.
Pump:
connect a ground wire and clamp to a true
earth ground as shown in your separate pump
manual.
3.
Fluid hoses:
use only grounded hoses with a
maximum of 500 ft. (150 m) combined hose length
to ensure grounding continuity.
4.
Air hoses:
use only Graco heated hose, which are
electrically conductive.
5.
Spray gun:
obtain grounding through connection to
a properly grounded fluid hose and pump.
6.
Object being sprayed:
ground according to local
code.
7.
Fluid supply container:
ground according to local
code.
8.
All solvent pails used when flushing:
ground
according to local code. Use only metal pails,
which are conductive. Do not place the pail on a
non-conductive surface, such as paper or card-
board, which interrupts the grounding continuity.
9.
To maintain grounding continuity when flushing or
relieving pressure
, always hold a metal part of the
gun firmly to the side of a grounded metal pail,
then trigger the gun.
Fig. 5
227
228
Summary of Contents for FOAM-CAT 200 Series
Page 33: ...33 308219 Notes...
