4. Startup & Operation #

WARNING: Check and verify the tightness of all power distribution lines (screw terminals) before the startup process.

NOTE: Ensure all steps and precautions in Section 3 have been completed before starting up the dispenseIT.

4.1 Priming The Pump #

1. Turn on utility power from the wash to the dispenseIT system.
2. Close the pump isolating valve(s) and open the priming plug on the pump head.
3. Gradually open the isolating valve in the suction line until a steady stream of airless water runs out of the priming hole.
4. Close the plug and tighten securely.
5. Completely open the isolating valves.

Fig. 4.1 – 1 – Position of pump plugs

6. Verify that the electrical connections are in accordance with the wiring diagram on the motor.
7. Turn on utility power from the wash to the dispenseIT system.
8. Switch on the power and observe the direction of rotation.
9. When viewed from above, the pump should rotate counterclockwise.
10. To reverse the direction of rotation, first switch off the power supply. Interchange any two phases of the power supply.
11. Switch on the power again and check for proper direction of rotation. Once the direction of rotation has been verified, switch off the power again.

4.2 Pump Settings #

The Grundfos Pump arrives pre-programmed. For additional pump settings and pump programming instructions, refer to Appendix 3 – Pump Programming.

4.3 Verifying System Pressure #

1. Verify that the system pressure on the dispenseIT pressure gauge and on the pump’s display screen match (minimum 100 psi – maximum 200 psi) (Fig. 4.3. – 1). To adjust system pressure, refer to Appendix 3.
2. Check the system for leaks.

Fig. 4.3 – 1 – dispenseIT pressure gauge and pump home screen display

4.4 Verifying System Functions #

1. Override each function in your tunnel controller one at a time to ensure that the pump turns on with each function. Both the liquid and air solenoid should open.
2. Check for leaks at the poly tube connections.
3. Confirm each solenoid din coil LED illuminates when the solenoid is energized.

4.4.1 Setting Foaming Functions #

To effectively set up and adjust the foaming functions on the dispenseIT, use the air regulator knob to control the foam density and texture (Fig. 4.4.1 – 1).

• Increase Foam Thickness:
  • If a thicker or denser foam is desired, increase the air supply to the mixture.
  • To do this, turn the air regulator knob clockwise. This adjustment allows more air into the system, increasing foam density.
• Decrease Foam Thickness:
  • For a thinner or less dense foam, reduce the air supply.
  • Turn the air regulator knob counter-clockwise. This reduces air in the mixture, resulting in a lighter application.

It is necessary to set the regulators on non-foaming applicator lines at 2-5 psi in order to exhaust air from the process valves so that they can close fully. Refer to Section 6 – Troubleshooting if any of the following issues occur:

• Injector is not drawing any chemical.
• Injector draws the chemical for only a brief moment.
• Injector has a low but consistent vacuum chemical draw.

Fig. 4.4.1 – 1 – Air regulator knob