Graco 24T918, Instruction Manual

Page: 30 / 130

Operation
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6. Use pump air pressure regulator (C) to adjust pump
air pressure to 0.
7. Use vacuum transfer air pressure regulator (E) to
adjust vacuum transfer air pressure setting to
40-100 psi (280-690 kPa, 2.8-6.9 bar). Recom-
mended setting is 60 psi (414 kPa, 4.1 bar). See
F
IG
. 20.
NOTE:
If using shaker accessory, regulator should be
set to at least 65% of air pressure connected to shaker.
NOTE:
Vacuum transfer will not begin operating until
pump reaches operating temperature.
NOTE:
A new system may have residual oil due to test-
ing at the factory prior to shipping. To prevent smoking,
make sure to perform the following step.
8.
On new systems only:
temporarily adjust the melter
temperature to 250°F (121°C). See
Select ADM
Settings
on page 24 for instructions.
9. Press to enable the heaters and pump.
NOTE:
When system is up to temperature, the pump will
be activated automatically, but will not start because
there is no air pressure supplied to the pump.
NOTE:
When the melter is up to temperature, the
auto-fill function will initiate to fill the funnel with pellets.
10.
On new systems only:
After the melter has reached
250°F (121°C) and the funnel is filled with pellets,
set the melter temperature back to the desired oper-
ating temperature. See
Select ADM Settings
on
page 24 for instructions.
11. Use separate pattern controller to open the applica-
tors and keep them open.
12. With the applicators open and the system up to tem-
perature, slowly increase pump air pressure until
the pump begins to run very slowly. Approximately
20 psi (140 kPa, 1.4 bar) should be sufficient.
NOTE:
Operation may be erratic below 20 psi (140 kPa,
1.4 bar).
13. Continue running the pump until clean, air-free
material is dispensed from each applicator.
14. When each applicator is fully primed, adjust pump to
desired pressure setting:
a. Adjust pump pressure to between 20-100 psi
(140-690 kPa, 1.4-6.9 bar).
b. Use separate pattern controller to repeatedly
open and close each applicator while inspecting
the dispense pattern.
c. Repeat until desired dispense pattern is
achieved.
Manual Refill
NOTE:
Use Automatic Refill whenever possible. The
system uses Automatic Refill by default and must be
manually changed to Manual Refill. Only use Manual
Refill if the Automatic Refill system is not functioning
properly and cannot be fixed in a timely manner. Per-
form service to automatic feed system as soon as possi-
ble to limit debris buildup on feed funnel.
F
IG
. 20
To prevent fire and explosion, never exceed the clean-
ing fluid’s rated temperature. If the system was just
flushed, residual cleaning fluid is still in the system
until the system is primed with adhesive. Do not raise
temperature above cleaning fluid rated temperature
until system is primed with adhesive.
E
C
NOTICE
In the following step, to prevent damage to the pump
due to pump cavitation, do not supply more than 20 psi
(140 kPa, 1.4 bar) air pressure to the pump until the
system is fully primed.