Cafs system operation
- 1. WWyylliiee FFiirree ~~ RReessccuuee EEcclliippssee CCAAFFSS SSyysstteemm OOppeerraatt iioonn Instructor Capt. James Brown Footer Here
- 2. CCoouurrssee OObbjjeecctt iivveess The Driver/Operator shall be able to explain how the department’s Compressed Air Foam Systems (CAFS) operate and the components of the system. The Driver/Operator will learn the causes of damage to our Compressed Air Foam Systems (CAFS) that are a result of driver error. The Driver/Operator will be able to demonstrate the proper operational sequence of the department’s Compressed Air Foam Systems (CAFS) to include system start up, operation, and shut down. Footer Here
- 3. What SSyysstteemm DDoo WWee HHaavvee?? Waterous Eclipse 1750 GPM Pump with CAFS Footer Here
- 4. EEcclliippssee VViiddeeoo Footer Here
- 5. CCoommppoonneenntt ss Pump= Water FoamPro foam proportioning system= Solution injection Rotary Screw Compressor= Air Clutch Drive System- This is the system use to turn on the compressor. Footer Here
- 6. OOppeerraatt iioonn PPrroocceedduurree Put pump PTO in gear. Shift transmission to drive. Pull tank to pump valve and crack the tank fill valve. Turn on the Foam Pro proportioning system While at idle turn on the compressor power switch. Pull the valves for the lines that are pulled. Throttle up until the pressure gauges on the pulled hand-lines are between 140-150 psi. Footer Here
- 7. CCaauusseess ooff DDaammaaggee Starting the compressor when not at idle. Starting the compressor when there is still pressure on the system. Footer Here
- 8. Engine MMoonniittoorriinngg GGaauuggeess The engine must be at idle to start the compressor!!!!! Footer Here
- 10. AAiirr PPrreessssuurree GGaauuggee Must be at zero to start the compressor!!!! Footer Here
- 11. FFooaamm PPrrooppoorrttiioonniinngg CCoonnttrrooll UUnniitt Defaults to 0.3 percent for our standard foam applications. That is 3/10 of 1 percent, not 3%. Footer Here
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- 13. CCoommpprreessssoorr PPTTOO SSwwiittcchh Only engage at idle!!!!!!! No exceptions!!!!!!!!! Footer Here
- 14. Compressor CCoonnttrrooll PPaanneell AAuuttoo//RRuunn PPoossiittiioonn This is the position we run when we are generating compressed air foam. The auto position allows the compressor to “auto”matically generate the appropriate amount of air for the amount of volume we are flowing. Footer Here
- 15. Pump Pressure and AAiirr PPrreessssuurree GGaauuggeess In “auto” the air will automatically adjust. Footer Here
- 16. CCAAFFSS AAiirr BBlleeeedd VVaallvvee • We specified these in order to insure the systems is completely bled off before starting the compressor. • As soon as you shut off the compressor, you should immediately open this valve, watch the pressure go to zero on the gauge, then close the valve. • If the valve is left open, the system won’t maintain pressure. Footer Here
- 17. Compressor Control SSyysstteemm-- FFiixxeedd//RRuunn PPoossiittiioonn We do not use this position for CAFS generation. This is an auxiliary position where we set the pressure goes to max air generation. What do we use this for? •We can use this position to blow out our hoses after use. •We can also use this to dry out frozen hoses. •This can be used as an auxiliary air source for power tools and such. This is difficult on our existing units due to we don’t have many access ports that are accessible. The new units will have a port on the pump panel for this. Footer Here
- 18. WWyylliiee FFiirree ~~ RReessccuuee GGeenneerraall PPuummpp II nnff oorrmmaatt iioonn aanndd MMaaiinntt eennaannccee Footer Here
- 19. Pump Oper at iioonnss aanndd MMaaiinntteennaannccee We have centrifugal pumps. • They work by slinging water from the innermost portion of the pump outwards to the discharges. • Basics on how to engage the pump: • Remember to give the pneumatic shifter time, it is not instantaneous. • Once you have a green light you can then engage the truck transmission. • Open and close all discharges and intakes slow as to avoid water Footer Here hammer. • Perform all steps in reverse order to disengage the pump.
- 20. Pump Oper at iioonnss aanndd MMaaiinntteennaannccee • Pump discharge pressure can be regulated by • adjusting pump speed • discharge valve opening • nozzle size • pump intake pressure Footer Here
- 21. Pump Oper at iioonnss aanndd MMaaiinntteennaannccee Potential problems to watch for. • Cavitation • Overheating • Pump Maintenance • Regular external cleaning • Run C.L.R. through the pump about every 6 months • Check primer fluid level daily • Perform daily pump operations check to ensure proper function and catch Footer Here any problems early. • Report any problems to your officer and fill out a mechanical defect form and forward it to C-shift sta. 1.
- 22. Pump Oper at iioonnss aanndd MMaaiinntteennaannccee Pressure relief valve • Used as a safety measure. • Setting the pressure relief valve should be done daily during your morning pump Footer Here check. • Slowly increase pump pressure until the relief valve opens. • Make any adjustments in quarter turn increments until desired relief pressure is obtained. • Lower the pump pressure below the relief pressure and wait for the relief valve to close. • Slowly increase pump pressure to test the pressure relief setting.