Manual

Operation ❑

CAFSPro User Operation Manual

p/n: 029-0020-75-0

Compressor

The compressor is powered by the fire pump gear box. An air clutch auto-

matically engages when the gear box is shifted from ROAD to PUMP.

The clutch engagement:

❑ Allows the production of instant compressed air foam from the time the

first hand line is opened

❑ Provides a means of controlling the air compressor

The compressor is water cooled, using water from the fire pump. It is impor-

tant to maintain pump circulation in order to avoid overheating the fire pump

and compressor.

Also, when the compressor is in STANDBY mode, the clutch is still engaged

and the compressor is still turning. This allows the air to return on-line at a

moment’s notice with a touch of a button. However, if you press and hold

down the POWER button on the air injection controller for a full six seconds

and through the beep warning process, the air compressor clutch disen-

gages and the compressor shuts down.

Note: Before the clutch disengages the display beeps a warning, and counts

down OFF3...OFF2…OFF1, only then does the clutch disengage. If you release

the POWER button before or during this warning the clutch does not disengage.

To power the compressor back on, the fire pump must be throttled down to IDLE

rpm and the pump disengaged, and then reengaged to restart the cycle.

CAUTION !

DO NOT DISENGAGE THE FIRE PUMP WHILE THE TRUCK TRANSMISSION IS

IN GEAR. SHIFT TO “NEUTRAL” AND WAIT FOR THE DRIVE SHAFT TO

“STOP.” FOLLOW MIDSHIP PUMP SHIFT PROCEDURES IN THE APPROPRI-

ATE MANUAL. DO NOT RUN CAFS ABOVE 150 PSI (10.3 BAR). IF TRUCK IS

TO BE USED AS A WATER SUPPLY UNIT AT PRESSURES ABOVE 150 PSI

(10.3 BAR), YOU MUST DISENGAGE COMPRESSOR CLUTCH.

Tanks

If so equipped, your truck could have either an “air dual tank switch” (ADT)

or a “manual dual tank” valve (MDT). Your truck could also have both an A

foam reservoir and a B foam reservoir. Use an approved Class “A” foam

concentrate in the A tank and approved Class “B” foam concentrate in the B

tank. This provides maximum flexibility in dealing with various fire hazards.