Graco 24T918, Instruction Manual

Page: 35 / 130

Operation
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5. On the System 3 screen (in the Setup screens), ver-
ify the Refill Setting is set to “Manual”.
6. Change the melter, heated hoses, and applicators
temperature settings to the high temperature hot
melt cleaning fluid manufacturer’s recommended
temperature.
7. Verify the system air inlet ball valve is closed and
pump air pressure is set to 0.
8. Allow the system to heat or cool to the cleaning fluid
manufacturer’s recommended temperature.
9. Fill melter with high temperature rated hot melt
cleaning fluid. See hot melt adhesive material sup-
plier for recommended hot melt cleaning fluids.
Fluid level should be 1/2 in. (12.7 mm) from the top
of the melter.
10. Disconnect one hose from its applicator manifold.
NOTE:
Keep all applicators closed throughout this pro-
cedure.
11. Route the disconnected hose to a waste container.
12.
If heating system is disabled,
press to enable
the heaters and pump.
13. Wait for the melter temperature to reach the hot
melt cleaning fluid manufacturer’s recommended
temperature.
NOTE:
The pump will not run because the system air
inlet ball valve is closed.
14. Once the required melter temperature is reached,
let the hot melt cleaning fluid “soak” in the melter at
temperature for the duration specified by the hot
melt cleaning fluid manufacturer.
NOTE:
"Soaking” is important to ensure the best possi-
ble cleaning.
15. After the hot melt cleaning fluid has “soaked” for the
specified amount of time, open the system air inlet
ball valve. Slowly increase the pump air pressure
until pump begins to cycle to begin pumping the hot
melt cleaning fluid and adhesive mixture out through
the hose into the waste container.
16. Once the pump begins to cycle faster, close the sys-
tem air inlet ball valve to stop the pump.
17. Repeat steps 7 through 16 until clean, adhe-
sive-free hot melt cleaning fluid is dispensed from
the detached hose.
NOTE:
Now the melter and the disconnected hose are
thoroughly flushed.
18. Reattach the hose to the applicator manifold.
19. Repeat steps 7 through 18 for each additional
installed hose, leaving a different hose discon-
nected from the applicator manifold each time.
20. Remove and replace filter(s) in all applicator mani-
folds. See applicator manual.
21.
Replace Outlet Filter
. See page 37.
22. Turn main power switch OFF.
23. Place waste container below drain tray (W2) then
remove drain plug (W1) and wait for system to finish
draining. See F
IG
. 2 on page 12.
24. Allow the system and fluid to cool then perform any
required maintenance procedures beginning on
page 37.
To prevent fire and explosion, never exceed the clean-
ing fluid’s rated temperature.
WLD