Operation - Graco Series B Instructions-Parts List Manual

WARNING
Pressure Relief Procedure
To reduce the risk of serious bodily injury, splashing
in the eyes or on the skin, or injury from moving
parts, always follow this procedure whenever you
shut off the pump, when checking or servicing any
part of the system, when installing, cleaning or
changing spray nozzles, and whenever you stop
spraying.
1. Shut off the air to the pump.
2. Close the bleed–type master air valve (required
in your system).
3. Close the pump air valve.
4. Close the pump restrictor valve.
5. Shut off the air to the agitator (if used).
6. Hold a metal part of the spray gun firmly to the
side of a grounded metal pail, and trigger the
spray gun to relieve pressure.
7. Open the drain valve, having a container ready
to catch the drainage.
8. Leave the drain valve open until you are ready to
spray again.
Flush the Pump
WARNING
For your safety, read the warning section, FIRE
OR EXPLOSION HAZARD, page 3, before flush-
ing, and follow all recommendations given there.
The pump is tested with lightweight oil, which is left in to
protect the pump parts. If the fluid you are using may be
contaminated by the oil, flush it out with a compatible sol-
vent before using the pump.
Start and Adjust the Agitator
1. Turn on the main air supply and slowly open the agi-
tator air control valve (78). DO NOT exceed 100 psi
(7 bar) MAXIMUM INCOMING AIR PRESSURE to
the agitator.
2. Use the lowest speed possible to thoroughly agitate
the fluid. If the agitator is operated at too high a
speed, the paint may foam. Agitate the fluid thor-
oughly before using it.
3. Operate the agitator continuously while you are
spraying or circulating the fluid.
4. Stop the agitator by closing the air control valve (78).
For overnight shutdown, close the main air supply
valve first.
Start and Adjust the Pump
NOTE: Refer to Typical Installation drawing on page 4.
Reference numbers and letters in the text corre-
spond to the callouts in the drawings.
1. Close the pump air regulator (21) and the agitator air
control valve (78).
2. Turn on the main air supply and open the bleed–type
master air valve (A).
6 306560

OPERATION

When using the pump in a circulating system:
3. Open the air motor restrictor valve (Q) by turning the
knob counterclockwise as far as possible.
4. Slowly open the pump air regulator (21) until you ob-
tain the desired pump speed and pressure. To re-
duce system wear, always use the lowest pump
speed and pressure needed for the results you want.
5. Turn the restrictor valve (Q) clockwise until the fluid
pressure at the pump is about three times the fluid
pressure needed at the last outlet of the circulating
system.
For example, if 12 psi (0.8 bar) is needed at the last
spray gun, adjust the outlet pressure to 36 psi (2.4
bar).
Adjust the pump air regulator (21) while adjusting the
fluid pressure to maintain pump speed and pressure.
6. When the pump speed and fluid pressure have been
adjusted, tighten the restrictor valve locknut.
7. Trigger the gun until all air has been purged from the
system. The pump will run continuously and speed
up or slow down as supply demands until the air sup-
ply is shut off.
When using the pump in a direct supply system:
3. Trigger the gun into a waste container and slowly
open the pump air regulator (21) until you obtain the
desired pump speed and pressure. To reduce sys-
tem wear, always use the lowest pump speed and
pressure needed for the results you want.
4. After all the air is purged, close the gun. The pump
will start and stop as the gun is opened and closed.
All systems:
To reduce the risk of overpressurizing your system,
which could result in component rupture and cause
serious bodily injury, NEVER exceed the maximum
air and fluid working pressure of the lowest rated
component in your system. See EQUIPMENT MIS-
USE HAZARD, System Pressure, on page 3.
For your safety, NEVER raise the elevator or drum
cover until after the pump and agitator are shut off
and the pressure has been relieved. Follow the
Pressure Relief Procedure Warning, above.
NEVER allow the pump to run dry of the fluid being
pumped. A dry pump will quickly accelerate to a high
speed, possibly damaging itself. If your pump acceler-
ates quickly, or is running too fast, stop it immediately and
check the fluid supply. If the supply container is empty
and air has been pumped into the lines, refill the container
and prime the pump and the lines with fluid, or flush and
leave it filled with a compatible solvent. Be sure to elimi-
nate all air from the fluid system.
WARNING
WARNING