8
Finish 230 AC Compact
GB
Operation
4.
Operation
Use the following procedures to operate the spray system.
4.1
Preparing to Prime
1. Fill the inlet valve with water or with a light household oil.
2. Make sure that the PRIME/SPRAY valve is set to PRIME and that
the pressure control knob is turned counterclockwise to its
lowest pressure setting.
3. Turn on the pump by moving the pump ON/OFF switch to the
ON position.
4. Increase the pressure by turning the pressure control knob
clockwise 1/2 turn.
5. Force the inlet valve to open and close by pushing on it with a
screwdriver or the eraser end of a pencil. It should move up and
down about 1.5 mm. Continue until water or oil is sucked into
the pump. This will wet the moving parts and break loose any
old paint residue.
6. Put the palm of your hand over the inlet. Turn the pressure
control knob clockwise to its maximum setting. You should
feel suction coming from the inlet valve. If you do not, refer to
the “Removing and Cleaning the Outlet Valve” procedure in the
Maintenance section.
7. Turn the pressure control knob counterclockwise to the
minimum pressure setting.
8. Turn the pump ON/OFF switch to OFF.
4.2
Priming with Hopper Assembly
1. Attach the hopper assembly to the pump.
a. Screw the return tube fitting into the return tube port on
the side of the pump.
i
Do not over-tighten. Hand tighten only. Some
threads will be visible even when fully tightened.
b. Thread the return hose onto the return hose fitting on the
pump.
c. Turn the paint hopper clockwise to thread it onto the inlet
valve. Continue to turn the paint hopper until it is secure
on the inlet valve.
i
Make sure the threads are straight and the hopper
turns freely on the inlet valve. Do not cross-thread.
d. Place the filter screen into the bottom of the paint hopper
and snap it in position.
e. Make sure that the motor ON/OFF switch is turned to OFF.
f. Place the straight end of the return tube into the return
tube fitting.
g. Thread the nut on the return tube fitting and tighten until
the return tube is secure.
h. Place the hook end of the return tube into the hole in the
paint hopper cover.
2. Turn the pressure control knob counterclockwise to its lowest
pressure setting.
3. Remove the paint hopper cover and fill the paint hopper with
material or place the suction set into a bucket of material.
4. Turn the PRIME/SPRAY valve to PRIME.
5. Move the motor ON/OFF switch to ON.
6. Turn the pressure control knob clockwise to between half and
full pressure. Let the unit prime 1 to 2 minutes after material
begins to flow through the return tube.
1
2
5
4.1
4.1
4.2
1a
1f
1b
1g
1c
1h
Attention
Always reduce the pressure to zero by triggering
the spray gun before changing the position of the
PRIME/SPRAy valve. Failure to do so may cause
damage to the paint pump diaphragm.
If the pressure control knob is reduced to zero and
the PRIME/SPRAy valve is still on SPRAy while the
pump is operating, there will be high pressure in the
hose and spray gun until the PRIME/SPRAy valve is
turned to PRIME or until the spray gun is triggered to
relieve the pressure.
