Graco 3A0869H Pressure Relief Procedure

Basic Operation

3A0869H 37

Pressure Relief Procedure

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. Shut off the A1 (plus A2 and A3, if using multiple

colors) and B fluid supply pumps/pressure pots.

3. Remove the Control Box cover.

4. With the gun triggered, push the manual override on

the A1 (A2, A3) and B dose valve solenoids to

relieve pressure. See F

IG

. 22.

5. Follow Purging procedure, page 34.

6. Shut off the fluid supply to solvent valves A and B.

7. With the gun triggered, push the manual override on

the A and B solvent valve solenoids to relieve sol-

vent pressure. See F

IG

. 22. Verify that solvent pres-

sure is reduced to 0.

8. Reinstall the Control Box cover.

To reduce the risk of skin injection, relieve pressure

when you stop spraying, before changing spray tips,

and before cleaning, checking, or servicing

equipment.

F

IG

. 22. Solenoid Valves in Control Box

Solvent Valve A

Solenoid

Manual overrides

Dose Valve

A1 Solenoid

Solvent Valve B

Solenoid Dose Valve B

Solenoid

ti15730a

Dose Valve A1 and A2

Solenoid location, if used

Gun Flush Box Solenoid

location, if used.

Contents

Main Operation ProMix 2KE Meter-Based Plural Component Proportioner 3A0869H Contents Models Related Manuals Warnings Page Page Important Two-Component Material Information Isocyanate Conditions Material Self-ignition Keep Components A and B Separate Moisture Sensitivity of Isocyanates Glossary of Terms Overview Usage Component Identification and Definition Installation General Information Intrinsically Safe Installation Requirements Installation Non-Hazardous Locations 3A0869H 11 IG . 2. Non-Hazardous Location Installation Display Module Air Supply Requirements Air Connections Fluid Supply Requirements Fluid Connections Page Set Up the Fluid Manifold for Dynamic Dosing * These parts are included in the 15U955 Injection Kit. Tubing Chart and Diagrams * Used only on IS models. * Installation 3A0869H 19 See Manual 312784 for full setup instructions for a gun flush box. Electrical Power Connection (non-IS units only) Neutral Ground Not included with system: Grounding Gun Flush Box Check Resistance Flow Meters Feed Pumps or Pressure Pots Page Display Module Display . Soft keys: Standby: Icon Key General Icons Spray Gun States Operation Modes Screen Shortcuts Screen Summary Run Mode Setup Mode Troubleshooting Mode Display Module Ranges for User Inputs Page Page Page Page Basic Operation Pre-Operation Tasks Power On Initial System Setup Prime the System Meter Calibration Spraying Purging Color Change Color Change Sequence Color Change Procedures Purge/Color Change Detail Purge/Flush Pre-Mix Fill Mix Fill Pressure Relief Procedure Lock Mode Valve Settings clockwise. counterclockwise Shutdown Use of Optional USB Module USB Logs Job Log 1 Error Log 2 Setup Download Procedure Recommended USB Flash Drives Run Mode Details Run Mix Spray (Screen 2) Run Home (Screen 1) Run Mix Batch (Screen 3) Run Mix Totals (Screen 4) Run Job Number (Screen 38) Run Log Errors (Screens 5-14) Setup Mode Details Password (Screen 16) Setup Home (Screen 17) Configure 1-4 (Screens 18-21) Page Recipe 0 (Screen 27) Recipe 1-1 (Screen 28) Recipe 1-2 (Screen 29) Maintenance 1-3 (Screens 24-26) Maintenance Recommendations Calibration 1 and 2 (Screens 22 and 23) Troubleshooting (Screens 35-37) Troubleshooting System Inputs (Screen 35) Membrane Test (Screen 36) Troubleshooting System Outputs (Screen 37) Dosing Options Sequential Dosing Page Dynamic Dosing Overview Dynamic Dosing System Parameters Select a Component B Restrictor Size Select Dynamic Dosing Page System Errors System Alarms System Advisory/Record Codes To Clear Error and Restart Air Flow Switch (AFS) Function System Idle Notice (IDLE) In applications using the AFS, Without the AFS, System Errors 3A0869H 57 Error Codes Table 5: System Alarm/Advisory/Record Codes Alarm Troubleshooting Page Page A If the pressures are already about equal, A If the pressures are already about equal, Page Page Dynamic Dosing Restrictor Selection Graphs Application: Select the Restrictor Size: Flow Rate: Fluid Supply: . 58. Dynamic Dosing Performance (1:1 Ratio, 90 centipoise fluid, 100 psi A side pressure) Differential Pressure between A and B Detail View . 59. Dynamic Dosing Performance (5:1 Ratio, 90 centipoise fluid, 100 psi A side pressure) Differential Pressure between A and B Detail View . 60. Dynamic Dosing Performance (10:1 Ratio, 90 centipoise fluid, 100 psi A side pressure) Differential Pressure between A and B Detail View 3A0869H 69 . 61. Dynamic Dosing Performance (20:1 Ratio, 90 centipoise fluid, 100 psi A side pressure) Differential Pressure between A and B Detail View . 62. Dynamic Dosing Performance (30:1 Ratio, 90 centipoise fluid, 100 psi A side pressure) Differential Pressure between A and B Detail View Page Schematics Hazardous Location System Pneumatic Schematic MOTOR B MERKUR MOTOR A Non-Hazardous Location Pneumatic Schematic MOTOR B MERKUR MOTOR A MERKUR Hazardous Location Electrical Schematic USER INTERFACE MODULE AIR FLOW SWITCH 1 3X CABLE MEMBRANE Hazardous Location Electrical Schematic (continued) FLUID CONTROL MODULE FERRITE FERRITE LINEAR SENSOR/ SOLENOID/METER CABLE HARNESS Non-Hazardous Location Electrical Schematic USER INTERFACE MODULE AIR FLOW SWITCH 1 3X CABLE SOLENOID Non-Hazardous Location Electrical Schematic (continued) FLUID CONTROL MODULE REED SWITCH CABLE LINEAR SENSOR/ SOLENOID/METER CABLE HARNESS Dimensions and Mounting Technical Data Graco Standard Warranty Graco Information