SPRAY GUN
Attach spray gun to airless unit and tighten fittings securely. Set the gun safety
latch. The gun safety latch should always be set when the gun is not being
triggered. Read all warnings and safety precautions supplied with the spray gun
and in product manual.
SPRAY TIP ASSEMBLY
1
Be sure
PRESSURE RELIEF
PROCEDURE
is followed before
assembling tip and housing to
the gun.
2
Lock gun safety latch.
3
Insert Tip into the guard housing
assembly. Rotate the tip to the forward
position (the arrow on the tip handle will point forward).
4
Guide metal seat into guard housing
assembly through retaining nut and turn
until it seats against the cylinder.
5
Insert O
-
Ring gasket on metal seat so it fits in the grooves.
6
Finger tighten guard housing retaining nut onto the gun.
7
Turn guard to the desired position.
8
Completely tighten the retaining nut by hand only.
TO REMOVE CLOGS FROM SPRAY TIP
1
Lock gun safety latch.
2
Turn tip handle 180 degrees.
3
Disengage trigger lock & trigger gun into pail.
4
If the tip handle appears locked loosen the retaining nut. The handle will now
turn easily.
5
Engage gun safety latch and return handle to the spray position.
WARNING:
Never attempt to spray with the tip in any position in
-
between either
fully forward or fully reversed. It could cause a high pressure hazard.
20
QTech
Spray.com
Even coat throughout
SPRAYING
Check the quality of the spray pattern on a piece of scrap material, such as
cardboard. Turn the pressure control knob clockwise to increase pressure and
counterclockwise to decrease pressure. Start with a low spray pressure and
slowly increase the pressure until a good spray pattern is achieved. If the
pressure is too low, the pattern will have
“
tails
”,
which is a pattern with heavy,
uneven edges. Keep testing and increasing pressure until a smooth, regular
pattern is achieved. If the pressure is at maximum and the pattern is still not
ideal, either go to a smaller orifice tip or thin the material. Do not raise the
pressure any higher than is necessary. Operating the sprayer at a higher than
necessary pressure wastes material, causes early tip wear, and shortens sprayer
life. Excessive pressure can also result in bounce
-
back of the material and a
rough finish. (Running with the pressure at the absolute maximum setting will
also make the pump run on and off in an irregular way).
NOTE: Do not rely only on the readout to set the pressure.
The preferred method
of setting the pressure is to test spray on scrap materials and observe the spray
pattern. While spraying, hold the gun perpendicular about 25
-
30 cm (10
-
12 inches)
away from the surface. Do not swing or tilt the gun.
Trigger the gun before moving and release the trigger afer each stroke. Overlap
each previous stroke by half. Do this by aiming the tip to the edge of the previous
stroke. Work in sections within your reach. When painting corners, point the gun
parallel to the corner. Cut in edges and corners first. Then paint flat areas. Do not
allow the paint to run out.
Remember to follow the PRESSURE RELIEF PROCEDURE
before refilling material.
If the paint does run out, the pump will suck in air.
This air must be bled out, follow the instructions for PRIMING.
21
QTech
QT830 Airless Sprayer
Light coat
Light coat
Heavy coat
Incorrect
| Wrist being flexed
Correct
| Gun held perpendicular
Approximately 10
-
12 inches
