Pressure Relief Procedure

Basic Operation

Power down and power back up again to clear the lock and put the new settings into effect. The lock ensures that the selection was intended and prevents the user from attempting to operate with incorrect settings.

To reduce the risk of skin injection, relieve pressure when you stop spraying, before changing spray tips, and before cleaning, checking, or servicing equipment.

NOTE: The following procedure relieves all fluid and air pressure in the ProMix 2KE system.

1.Press on Run Mix Spray (Screen 2) or from any screen to put the system in Standby.

2.Follow procedure for Purging Fluid Supply Sys- tem, page 33, if desired or necessary.

3.Shut off air supply to A and B pumps and solvent supply pumps.

4.With the gun triggered, push the manual override on the A and B dose and solvent valve solenoids to relieve pressure. See FIG. 19. Verify that fluid pres- sure is reduced to 0.

5.Reinstall the Control Box cover.

Valve Settings

Dose valves and purge valves are factory set with the hex nut 1-1/4 turns out from fully closed. This setting limits maximum fluid flow rate into integrator and mini- mizes valve response time. To open dose or purge valves (for high viscosity materials), turn hex nut (E) counterclockwise. To close dose or purge valves (for low viscosity materials), turn clockwise. See FIG. 21.

E

TI11581a

FIG. 21. Valve Adjustment

Lock Mode

NOTE: Do not change system type, number of guns, hose length or hose diameter when material is loaded in the system. Change these inputs only if system hard- ware is changed.

If you change one of these inputs, the system locks so that you cannot spray or mix. If you have changed to a meter system, the system also locks if you change the dosing type or the number of colors. The lock icons dis- play.

Shutdown

1.Follow Purging, on page 32.

2.Close main air shutoff valve on air supply line and on ProMix 2KE.

3.Non-IS Systems: Shut off ProMix 2KE power (0 position).

Lock icons

FIG. 20. System Lock Mode

3A0868G

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Graco 3A0868G important safety instructions Pressure Relief Procedure, Valve Settings, Lock Mode, Shutdown