Graco 234192, Instructions Manual

Page: 9 / 30

309668 9
Operation
Pressure Relief Procedure
PRESSURIZED EQUIPMENT HAZARD
The system pressure must be manually relieved to
prevent the system from starting or spraying acci-
dentally. To reduce the risk of an injury from acci-
dental spray from the gun, splashing fluid, or mov-
ing parts, follow the Pressure Relief Procedure
whenever you
D Are instructed to relieve the pressure
D Stop spraying
D Check or service any of the system equipment
D Install or clean the spray tips
WARNING
1. Shut off the air to the pump.
2. Open the dispensing valve, if used.
3. Open the fluid drain valve to relieve all fluid pres-
sure, having a container ready to catch the drain-
age.
Flush the Pump Before First Use
The pump was tested in water. If water could contami-
nate the fluid you are pumping, flush it thoroughly with
a compatible solvent. Follow the steps under Starting
and Adjusting the Pump.
Starting and Adjusting the Pump
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can
cause serious injury or death if splashed
in the eyes or on the skin, inhaled, or
swallowed. Do not lift a pump under pressure. If
dropped, the fluid section may rupture. Always
follow the Pressure Relief Procedure above
before lifting the pump.
WARNING
1. Be sure the pump is properly grounded. Read
FIRE OR EXPLOSION HAZARD on page 3.
2. Check all fittings to be sure they are tight. Be sure
to use a compatible liquid thread sealant or PTFE
tape on all male threads. Tighten the fluid inlet and
outlet fittings snugly. Do not overtighten the fittings
into the pump.
3. Place the suction tube (if used) in the fluid to be
pumped.
4. Place the end of the fluid hose (N) into an
appropriate container. Close the fluid drain valve
(J).
5. With the pump air regulator (H) closed, open all
bleed-type master air valves (B, E).
6. If the fluid hose has a dispensing device, hold it
open while continuing with the following step.
Slowly open the air regulator (H) until the pump
starts to cycle. Allow the pump to cycle slowly until
all air is pushed out of the lines and the pump is
primed.
If you are flushing, run the pump long enough to
thoroughly clean the pump and hoses. Close the
air regulator. Remove the suction tube from the
solvent and place it in the fluid to be pumped.
Pump Shutdown
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure at left.
At the end of the work shift, relieve the pressure.