Graco 25D117, Операция

Страница: 21 / 50

Operation
3A5354B 21
Start and Adjust Pump
1. Connect the pump outlet fittings and hose (not sup-
plied).
NOTE: Be sure all components are adequately sized
and pressure rated to meet the system’s requirements.
2. Be sure the air motor ball valve (BF) is closed. Then
set the ram air regulator to about 40 psi (0.28 MPa,
2.8 bar). Set the ram director valve (BC) to DOWN.
Remote Data Trak: If the system has this feature,
press the prime/flush key.
3. Start the pump as explained in the separate pump
instruction manual.
4. Keep the ram director valve (BC) set to DOWN
while the pump is operating.
NOTE: Increase air pressure to the ram if the pump
does not prime properly with heavier fluids. Decrease air
pressure if fluid is forced out around the top seal or
platen.
Change Drums
NOTE: Follow this procedure to change the drum on a
fully heated warm melt supply system.
.
If the light tower flashes red and is accompanied by
alarms sounding, it means the drum is empty and
should be replaced.
1. Close the air motor ball valve (BF) by turning it
clockwise to stop the pump. See F
IG
. 3.
2. Set the ram director valve (BC) to UP to raise the
platen, and immediately press and hold the blow off
air button (BG) until the platen is completely out of
the drum. Use the minimum amount of air pressure
necessary to push the platen out of the drum.
3. Once the platen clears the drum, release the
blow-off air button (BG) and allow the ram to rise to
its full height.
4. Remove the empty drum.
5. Press to eliminate the empty alarm.
6. Inspect the platen and, if necessary, remove any
remaining material or material build–up.
7. Place the full drum on the ram base.
8. Lower the ram and adjust the position of the drum
relative to the platen. Follow the Load Material pro-
cedure steps 5 - 8 of on page 17.
NOTICE
Do not use a drum of material that has been dented or
otherwise damaged; damage to the platen wiper can
result.
Excessive air pressure in the material drum could
cause the drum to rupture, causing serious injury. The
platen must be free to move out of the drum. Never
use the drum blow off air with a damaged drum.