Graco Fluid Automation 633, Operation

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Pressure Relief Procedure
42 332078C
Pressure Relief Procedure
There are three ways to relieve pressure of the system.
Manual Mode
Perform the procedure through the Operator Interface
Panel.
1. Enter into “Manual” mode from the “Mode Select”
screen.
2. Toggle the “Outputs Closed” button so that “Outputs
Open” is displayed. This will open the material
valves and allow the machine to relieve pressure.
3. Press the Stop button once the pressure has been
relieved.
4. Verify the analog pressure gauge reads 0 psi.
Dispense Head Solenoid
Perform the procedure mechanically and if the dispense
head can flow material freely.
1. Press and hold the solenoid override button to open
the dispense valve for the “A” material side.
2. Release the solenoid override button once the ana-
log pressure gauge reads 0 psi.
3. Repeat steps 1 through 2 for the “B” material side.
4. Press the Stop button.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury
from pressurized fluid, such as skin injection,
splashing fluid and moving parts, follow the Pressure
Relief Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
“A” Material
Pressure Gauge
“B” Material
Pressure Gauge
“A” Solenoid
Override
“B” Solenoid
Override
“A” Material
Pressure Gauge
“B” Material
Pressure Gauge