Graco 308692N, Instruction Manual

Page: 15 / 24

308692 15
Operation
Flushing
WARNING
FIRE AND EXPLOSION HAZARD
Before flushing, read the section FIRE
AND EXPLOSION HAZARD on page
5. Be sure the entire system and flush-
ing pails are properly grounded. Refer to
Grounding on page 7.
Flush the pump:
D
Before the first use
D
When changing colors or fluids
D
Before fluid can dry or settle out in a dormant pump
(check the pot life of catalyzed fluids)
D
Before storing the pump.
Flush with a fluid that is compatible with the fluid you
are pumping and with the wetted parts in your system.
Check with your fluid manufacturer or supplier for
recommended flushing fluids and flushing frequency.
CAUTION
If you have a carbon steel package, never leave
water or water-base fluid in the pump overnight. If
you are pumping water-base fluid, flush with water
first, then with a rust inhibitor such as mineral spirits.
Relieve the pressure, but leave the rust inhibitor in
the pump to protect the parts from corrosion.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 10.
WARNING
HOT SURFACE HAZARD
Do not touch the heater while it is oper-
ating. Allow the heater to cool for at least
10 minutes before flushing or servicing
it.
WARNING
FIRE AND EXPLOSION HAZARD
Do not
plug in or unplug the power cord
in any area containing flammable fluids
or fumes, to avoid fire or explosion
resulting in serious injury.
1. Unplug the heater power cord and circulate the
fluid for at least 10 minutes to cool the heated fluid
and the heater.
2. Relieve the pressure.
3. Remove the tip guard and spray tip from the gun.
See the gun manual.
4. Remove the filter element from the fluid filter (16).
Reinstall the filter bowl.
5. Open the back pressure regulator (40). Set the
3-way valve (45) to CIRC.
6. Place the suction tube (26) in a container of sol-
vent.
7. Hold a metal part of the gun firmly to the side of a
grounded
metal pail.
8. Start the pump. Always use the lowest possible
fluid pressure when flushing.
9. Trigger the gun. Flush the system until clear
solvent flows from the gun.
10. Release the gun trigger and lock the trigger safety.
The pump will continue to cycle as long as air is
supplied and the back pressure regulator is open.
11. Set the 3-way valve (45) to DRAIN. Hook the drain
hose (46) onto a waste container and continue
flushing until clear fluid comes from the hose.
12. Relieve the pressure.
13. Clean the tip guard, spray tip, and fluid filter ele-
ment separately, then reinstall them.
14. Clean the inside and outside of the suction tube
(26).