Foam System Operation; 3-1.1 Classa Foam - U - Pierce HUSKY 12 GPM Operation & Maintenance Manual

SECTION 3
3-1.

Foam System Operation

3-1.1 Class A Foam - Using On-Board Foam Tank
1. Engage water pump transmission.
2. Recirculate water.
3. Turn the system ON.
NOTE: • The default foam valve will open automatically (typically Class A, @ 0.3-.5%).
• If water flow drops below 20 GPM, the foam system will go into standby until the water flow is
increased to 20 GPM or above. At the toggle point, between 19-20 GPM, the system will want
to go on and off standby. Maintaining water flow above 20 GPM will prevent this.
4. Begin flowing water, foam pump will activate.
5. Use the ARROW UP / ARROW DOWN buttons to change percentage (if needed).
6. When beginning the mop up phase, turn the system OFF; use the foam in the hose for mop up.
NOTE: The only flush needed is to run the hose until it is mostly free of bubbles. The foam pump is
designed to be flooded with foam.
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Figure 3-1: Control Head in Class A Foam Mode
OPERATION
Husky 12 Foam System / 3-1
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