How do I properly shut down, flush, and store my electric Graco Reactor?

Proper system shutdown, cleaning, and storage are critical for safe and effective operation of your electric Graco Reactor spray foam proportioner. This step-by-step guide contains the information you need to shut down and store your system.

Note: This step-by-step guide walks you through shutting down and flushing for storing your machine. This document does not replace the manual. For a full overview of safety instructions, please see the manual.

Shutting down

NOTICE: Proper system setup, startup, and shutdown procedures are critical to electrical equipment reliability. The following procedures ensure a steady voltage. Failure to follow these procedures will cause voltage fluctuations that can damage electrical equipment and void the warranty.

1. Press “Stop Proportioner” to stop the pumps.
2. Turn off all heat zones.
3. Relieve the pressure (See Pressure relief procedure, in the manual. page 60). 
4. Press “Park pump” to park the component A pump. The park operation is complete when the green dot goes out. Verify the park operation is complete before moving to next step.
5. Press the Startup/Shutdown button to deactivate the system.
6. Turn off the air compressor, air dryer, and breathing air.
7. Turn the main power switch OFF.
   1. WARNING: To prevent an electric shock, do not remove any covers or open the electrical enclosure door while the power is ON.
8. Close all fluid supply valves.
9. Set PRESSURE RELIEF/SPRAY valves to SPRAY to seal out moisture from the drain line.
10. Engage the gun piston safety lock, then close fluid inlet valves A and B.

Flushing

WARNING: To help prevent a fire and explosion:

• Flush equipment only in a well-ventilated area.
• Do not spray flammable fluids.
• Do not turn on heaters while flushing with flammable solvents.
• Flush out old fluid with new fluid, or flush out old fluid with a compatible solvent before introducing a new fluid.
• Use the lowest possible pressure when flushing.
• All wetted parts are compatible with common solvents. Use only moisture-free solvents. 

1. To flush feed hoses, pumps, and heaters separately from heated hoses, set PRESSURE RELIEF/SPRAY valves to PRESSURE RELIEF/CIRCULATION . Flush through bleed lines.
2. To flush the entire system, circulate through the gun fluid manifold (with manifold removed from gun).
3. To prevent moisture from reacting with isocyanate, always leave the system filled with a moisture-free plasticiser or oil. Do not use water. Never leave the system dry. (See Important Isocyanate Information, in the manual, page 7).
   

Refer to the manual for further directions: