Installation
10
3A7931B
Installation
Grounding
DM-22 Supply System (C):
Connect the supplied
ground wire and clamp to a true earth ground.
Air and fluid hoses:
use only electrically conductive
hoses with a maximum of 500 ft. (150 m) combined
hose length to ensure grounding continuity. Check
hoses’ electrical resistance. If total resistance to ground
exceeds 29 megohms, replace hose immediately.
Air compressor:
follow manufacturer’s recommenda-
tions.
Spray gun / Dispense valve:
ground through connec-
tion to a properly grounded fluid hose and pump.
Fluid supply container:
follow local code.
To maintain grounding continuity when flushing or
relieving pressure:
hold metal part of the spray
gun/dispense valve firmly to the side of a grounded
metal pail, then trigger the gun/valve.
System Location and Set Up
NOTE:
Reference numbers and letters in parentheses
in the text refer to the callouts in F
on page 7, 8 and 9 and the parts drawings. Refer to
those for installation.
If you supply your own accessories, be sure they are
adequately sized and pressure-rated to meet the sys-
tem’s requirements. Contact your Graco distributor for
assistance in designing a system to suit your needs.
1. Place the system on a hard, level surface. Check
that the system is level in all directions. Refer to
on page 24 to ensure there is sufficient
overhead clearance for the pump when the ram is
fully raised. Leave room on both sides for air regula-
tors to be easily accessible.
2. Connect air tubes. Refer to
on page 11. Connect an air supply
hose to the 8 mm(f) Main Air Line Inlet Fitting (AR).
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. Grounding provides an escape wire
for the electric current.
F
IG
. 5 Grounding
Ground Wire
