Pressure Relief Procedure; Grounding (Atex Systems Only) - Graco EcoQuip 300 Operation, Repair, And Parts

Pressure Relief Procedure

Pressure Relief Relief Procedure
Pressure Pressure Relief
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.
1. Turn the pot pressure regulator (PR) off.
2. Close the abrasive ball valve.
3. Turn the compressor off. Close the compressor
supply air valve.
4. Engage the blast control switch to relieve
pressure in the system.
5. Verify that the air pressure gauge reads 0 psi.
Then disconnect the air inlet hose from the
system.
10
Procedure
Procedure
6. Turn the selector valve (SL) to FILL.
7. Open the dump valve.
8. Verify that the pot pressure gauge (PG) displays
zero pressure.
Grounding (ATEX (ATEX Systems
Grounding Grounding (ATEX
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.
Systems: Use supplied ground wire and clamp
Systems: Systems:
(237686).
Air Air and Air and and fluid fluid fluid hoses: hoses: hoses: Use only genuine Graco ATEX
rated, conductive hose s with a maximum length
of 150 ft (45 m) combined hose length to ensure
grounding continuity. Check the electrical resistance
of the hoses. If the total resistance to ground exceeds
29 megaohms, replace the hose immediately.
Air Air Compressor: Air Compressor: Follow manufacturer's Compressor:
recommendations.
Systems only) only)
Systems only)
334667G