Pressure Relief Procedure - Unimac UM-SP-35 User Manual

Unimac Airless Paint Sprayer UM-SP-35
Adjusting Spray Pressure
NOTE!
Operating the sprayer at higher pressure than needed, wastes material, causes early tip wear
and shortens sprayer life.
1. Turn the "Pressure Control Knob" Clockwise to increase pressure and counter-clockwise to decrease
pressure.
2. Always use the lowest pressure necessary to completely atomize the material.
3. If more coverage is needed, use a larger tip rather than increasing the pressure.
4. Check the spray pattern. The tip size and angle determines the pattern width and flow rate.

Pressure Relief Procedure

IMPORTANT!
To avoid possible serious body injury, always follow this procedure whenever the
sprayer is shut off, when checking it, when installing, changing or cleaning tips, whenever you stop
spraying, or when you are instructed to relieve the pressure.
1. Engage the gun safety latch (if equipped). Refer to the separate instruction manual provided with your
spray gun for information on safety features and how to operate the safety latch.
2. Turn the unit off.
3. Disengage the gun safety latch and trigger the gun to relieve residual fluid pressure.
4. Place the Prime/Pressure Relief Valve (PR valve) to the open (priming) position to relieve residual
fluid pressure.
Note: the valve handle can move both clockwise and counter clockwise and can face different
directions.
5. If the spray tip or hose is clogged, follow step 1 through 4 above. Expect some spray material to be
ejected from the spray gun while the pressure is released at step 4.
6. If you suspect that pressure hasn't been relieved due to a damaged Prime/Pressure Relief Valve or other
reason, engage the gun safety latch and take your unit to an authorized service centre.
Switching the Machine OFF
IMPORTANT! Whenever you stop spraying, even for a short break, follow the "pressure relief
procedure" in this manual.
IMPORTANT! 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" in this manual.
1. After spraying, turn the pressure valve in a counter-clockwise direction to allow pressure to escape
2. Loosen the "prime / spray valve", then shut the motor after the pressure gauge shows "0" pressure.
3. Clean the spray gun and tip.
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