Pressure Relief Procedure - Graco ProMix PD2K Repair Parts

Pressure Relief Procedure

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 skin injection,
splashing fluid and moving parts, follow the
Pressure Relief Procedure when you stop spraying
and before cleaning, checking, or servicing the
equipment.
Without Color Change
NOTE: The following procedure relieves all fluid and
air pressure in the system. Use your control interface
to issue the necessary commands to your system.
1. Turn off the supply pumps. Open the drain valve
on the supply line fluid filter to relieve pressure
in the supply line.
NOTE: If your system does not include a drain
valve on the supply line, command the system to
Mix. Cycle the A and B dosing pumps a couple
of times to drain the pumps through the spray
device.
2. Command the system to Standby. Trigger the
spray device to relieve pressure.
3. Flush the remote mix manifold and spray device.
4. Shut off the solvent supply pump. To relieve
pressure, command the system to Purge and
trigger the spray device. When the pressure is
relieved, command the system to Standby to
avoid getting a Purge Incomplete alarm.
5. If pressure remains in the solvent line between
the solvent supply pump and the solvent valve:
• VERY SLOWLY loosen a fitting to relieve
pressure gradually.
• Loosen the fitting completely.
6. Dual Panel Systems: Repeat for Mix Unit #2.
332709D
With Color Change
NOTE: The following procedure relieves all fluid and
air pressure in the system.
1. Turn off the supply pumps. Open the drain valve
on the supply line fluid filter to relieve pressure in
the supply lines. Do this for each color.
2.
To help prevent fire and explosion, shut off
electrostatics before flushing.
If using an electrostatic gun, shut off the
electrostatics before flushing the gun.
3. Trigger the gun to relieve pressure. From
Maintenance Screen 5 on the ADM, check the
box in the field labeled Gun for each color in the
system to manually open each color valve.
4. Set the system to Recipe 0 to flush the pumps
and to purge to the spray device. Hold the gun
trigger open after the solvent valve shuts off to
relieve all pressure. When flushing is complete
the system will go to Standby.
5. Shut off the solvent supply pump. Set the system
to Recipe 0 to flush solvent from the pumps and
to purge to the spray device. Command the
system to Standby after just a couple of seconds,
to avoid getting a Purge Incomplete alarm.
6. If pressure remains in the solvent line between
the solvent supply pump and the solvent valve:
• VERY SLOWLY loosen a fitting to relieve
pressure gradually.
• Loosen the fitting completely.
7. Verify on the ADM Home Screen that neither
pump is showing any pressure.
8. Dual Panel Systems: Repeat for Mix Unit #2.
Repair
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