DRAFT
TM 5-4210-249-13&P-1
0034
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TFFT02225
4.
Put FOAM SELECT switch (5) to desired foam agent. Indicator light A (6) or light B (7) will illuminate.
5.
Make sure correct foam indicator light A (6) or light B (7) is illuminated.
6.
Establish water flow to desired discharge outlet(s) (WP 0028).
NOTE
Foam system agent percentage is preset for turrets and ground sweeps and is not
adjustable.
The foam system will discharge class A foam at 0.5% at 200 to 210 psi (1,379 to
1,448 kPa). At pressures lower than 200 psi (1,379 kPa), the foam concentrate will be
higher.
7.
For class A foam, use pressure governor to adjust discharge pressure to desired pressure (WP 0024),
depending on type of operation.
NOTE
The foam system will discharge class B foam at 3% at 200 to 210 psi (1,379 to 1,448 kPa).
Class B foam should not be discharged at reduced pressures.
Activating the PRESET switch on the pressure governor (pressure mode), will
automatically increase the discharge pressure to 200 to 210 psi (1,379 to 1,448 kPa).
8.
For class B foam, use pressure governor to adjust discharge pressure to 200 to 210 psi (1,379 to 1,448 kPa)
END OF TASK
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0034-2
