Operation
307906ZAA
7
Operation
Pressure Relief Procedure
Follow the Pressure Relief Procedure whenever
you see this symbol.
1.
Turn off power supply to the pump.
2.
Close the bleed-type master air valve (E) (required
in your system).
3.
Hold a metal part of the dispensing valve firmly to a
grounded metal container and trigger the dispense
valve to relieve pressure.
If you suspect that the nozzle or hose is completely
clogged, or that pressure has not been fully relieved
after you have followed the steps (above), wrap a rag
around the hose end coupling and relieve pressure
gradually by
very slowly
partially loosening the fitting.
Then loosen it completely. Then clear the obstruction.
Starting the Pump
1.
Turn the air regulator (C) to the minimum setting.
2.
Direct the outlet hose into a waste container.
3.
Open the bleed-type master air valve (E).
4.
Slowly adjust the air regulator (C) until the pump is
running smoothly and all air has been pumped out
of the pump and hoses. If the pump contains sol-
vent, be sure to pump it all into the waste container.
5.
Use the air regulator (C) to control the pump speed
and cycle rate. Always use the lowest pressure
needed to obtain the desired results. This results in
optimum system efficiency and reduces pump wear.
NOTE:
•
The pump only takes a few strokes to prime. How-
ever, in a large system, it may take several minutes
to completely prime the fluid lines.
•
To prevent air from being sucked into the pump and
fluid lines, if the supply container runs dry, use a
low-level cutoff valve at the pump intake. A 1-1/2
inch npt(f) thread connection low level cutoff valve is
available from Graco. Order Part No. 203688.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief
Procedure when you stop dispensing and before
cleaning, checking, or servicing the equipment.
HAZARDOUS VAPORS
The air motor exhaust coming out of the muffler could
contain harmful materials, such as oil, antifreeze, or
some of the material being pumped.
NOTICE
Never allow the pump to run dry of the fluid being
pumped. A dry pump quickly accelerates to a high
speed, possibly damaging itself, and it may get very
hot.
