Pressure Relief Procedure
3A4802D
7
Pressure Relief Procedure
1.
Close the abrasive ball valve (M).
2.
Close the compressor supply air valve, then turn the
compressor off.
3.
Make sure the supply pressure gauge (ZC) reads 0,
then close the air supply valve (Q).
4.
Disconnect the air supply hose.
5.
Turn the selector valve (W) to BLAST.
6.
Close the fill/flush valve (XD) and disconnect the
pressurized water supply.
7.
Open the pot dump valve (J) until the pot pressure
gauge (L) reads 0 psi.
Grounding
Systems: Use the supplied ground wire and clamp
(237686).
Air and fluid hoses: Use only genuine Graco blast
hoses with a maximum of 150 ft (45 m) combined blast
hose length to ensure grounding continuity. Check the
electrical resistance of the blast hoses. If the total resis-
tance to ground exceeds 29 megaohms, replace the
blast hose immediately.
Air compressor: Follow the manufacturer’s
recommendations.
Follow the Pressure Relief Procedure
whenever you see this symbol.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as splashing fluid, follow the
Pressure Relief Procedure when instructed.
WLD
M
WLE
17R192A, December 2016. Original Instructions, this manual contains English. MM 3A4802
WLD
ZC
Q
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.
WLD
XD
WLD
L
J
