Homak RD00912201 Manuel Du Propriétaire Et Mode D'emploi page 6

ABRASIVE SELECTION
1. The kind of media you choose will greatly influence the amount of time needed to clean a given
surface area. Abrasive media materials include glass bead, crushed garnet, crushed walnut shell
etc... DO NOT USE SAND OR SILICA BASED ABRASIVES.
2. A high moisture content of the media can cause blockage in the media metering valve. Be sure to
use dry media that is stored in a low-humidity environment. Only use O.S.H.A. recommended
abrasives.
3. If you elect to reuse media, remember it does wear out. If the sharp edges become more round
and are less effective, then replace with fresh media.
4. Reusing abrasive media may also cause clogging due to debris contained in the mixture from prior
use.
OPERATION
WARNING: Always wear your hood, dust mask and heavy-duty canvas gloves when operating.
1. Close the media metering valve (#26), pour about 25 lbs of abrasive media into the tank. Then
close the tank filler cap (#4) securely, assuring that o-ring (#3) is in place.
2. Turn the air pressure adjuster (#9) counter-clockwise (lowest pressure) fully. With the air com-
pressor off, attach the connector (#8) to an air supply hose coming from the air compressor. Tighten
securely with a hose clamp.
3. Switch on power to start up the air compressor. Check for leaks at the tank filler cap (#4) and along
all hoses and fittings as pressurization begins.
4. Turn the air pressure adjuster (#9) slowly clockwise until the pressure gauge reads a desired value.
5. Open the media metering valve (#26) and push down the control level of the abrasive gun (#24) to
an appropriate position to gain a desired media flow.
6. To shut the unit down, close the media metering valve (#26) and turn the air pressure adjuster (#9)
counter-clockwise until the pressure gauge reads "0 PSI". Push down the control level of the abrasive
gun (#24) to release any extra air, and to be sure that the air supply is off.
7. If there is too much water trapped in the air pressure adjuster (#9), open the bottom valve to drain
the water.
MAINTENANCE
1. You should make every effort to protect your air compressor from any damage it may receive from
your abrasive media work. Your best option is to keep the compressor in a room separate from the
pressure pot. Use a long hose to provide the PSI needed to do your work. A second choice is to keep
the compressor up wind from the work area. The greater the distance, the better. Other than that, you
should continue standard maintenance procedures for the compressor.
2. Some parts of the pressure pot will wear much more rapidly than others. The parts needing close
attention carry the air/abrasive mixture starting with the media hose and going through the metal fit-
tings, the shut off valve and the ceramic nozzles.
3. If air leaks develop in any of these parts you should stop all work and find what needs to be
repaired or replaced. Leaking joints may be repaired by replacing worn or damaged Teflon tape at
joints. When it's new, the media hose has 2 cord piles and the walls are ¼" thick. As the interior
diameter has media running through it, this wall becomes thinner and thinner. One way to inspect the
hose and other parts affected by the blasting is to put on your protective clothing. The pressurized the
system and close the nozzle shut off valve. Close your hand loosely around the hose and run it up
and down the hose across the fittings and nozzles. You'll be able to feel any leaks. You can also spot
places in the hose where the wall is getting very thin. These show up as blisters in the hose. If you
find such a blister, get a new hose immediately. If that blister breaks, the abrasive will come out of the
side of the hose at 65 or more PSI.
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