SPRAYING
1 Connect the hose and gun.
2 Check the electrical service.
Be sure the electrical service matches the rating
on the machine’s nameplate and that the outlet you use is properly grounded.
3 Fill the packing nut/wet cup with a few drops of QLube Piston Lubricant.
4 Flush the sprayer
a
Prepare the media to be sprayed according to the material manufacturer's
recommendations.
b
Place the suction tube into the media container.
c
Prime Valve must be ‘Open’ in the priming position.
d
When you have ensured that the gun safety latch is engaged, attach tip
and safety guard.
e
Turn the power switch to the ‘On’ position.
f
Allow the pump to prime. After the pump is primed, immediately turn
the Prime Valve to the ‘Closed’ position.
g
Turn Pressure Control Knob to the desired spray pressure.
h
Disengage the gun safety latch and you are ready to spray.
5 Adjusting the pressure
a
Turn the Pressure Control Knob clockwise to increase pressure and
counterclockwise to decrease pressure.
b
Always use the lowest pressure necessary to completely atomize the
material.
Note: Operating the sprayer at higher pressure than needed,
wastes material, causes early tip wear, and shortens sprayer life. It will
also result in the motor cycling on and off to maintain pressure. This
cycling will result in poor and inconsistent spraying results.
c
If more coverage is needed, use a larger tip rather than increasing
the pressure.
d
Check the spray pattern. The tip size and angle determines the pattern
width and flow rate. Spray a test pattern and then adjust the pressure to
eliminate heavy edges. Use a smaller tip size if the pressure adjustment
cannot eliminate heavy edges.
e
While spraying, hold the gun perpendicular, about 25-30cm (10-12 inches)
away from the surface. Spray back and forth. Trigger the gun before
moving and release the trigger after each stroke. Overlap by 50%.
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QTech
QT190 Airless Sprayer
WARNING
When you spray into the paint bucket, always use the lowest spray pressure
and maintain firm metal to metal contact between gun and container. To stop
the unit in an emergency, turn the motor off. Then relieve the fluid pressure in
the pump and hose as instructed in the ‘Pressure Relief Procedure’.
WARNING
Follow the ‘Pressure Relief Procedure’. To reduce the risk of injection, never
hold your hand, body, fingers or hand in a rag in front of the spray tip when
cleaning or checking for a cleared tip. Always point the gun toward the ground
or into a waste container when checking to see if the tip is cleared or when
using a self cleaning tip.
Shutting off the sprayer
a
Whenever you stop spraying, even for a short break, follow the ‘Pressure
Relief Procedure’.
b
Flush the sprayer at the end of each work day, if the material you are
spraying is water-based, or if it could harden in the sprayer overnight. See
‘Flushing’. Use a compatible solvent to flush, and then fill the pump and
hoses with an oil based solvent such as QTector pump conditioner.
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