OPERATION
3-6 / Husky 3 Foam System
© 2022 Pierce Manufacturing Inc. All Rights Reserved.
3-3. Priming (Charging) System
Figure 3-5: Prime Mode
1311, 1356
The Prime Mode is used to accelerate the foam pump for a short period of time, such as to purge the air out of the
on-board tank lines after initial filling or to fill the flexible pick up hose while drafting.
1. Select foam source.
NOTE: When the PRIME button is held down, it will run the foam pump at approximately 1.5 GPM.
2. Press and hold down the PRIME button (solid yellow LED will illuminate).
3. Release the button when foam is discharged out of the manifold drain.
4. Allow water/foam solution to run out of manifold drain until it is mostly clear of foam if unit is not immediately
going to be used to fight fire.
5. Close manifold drain. System is now charged and ready for use.
Water must be flowing through an open foam discharge OR open manifold drain to give the foam
solution somewhere to go.
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