North Star 157597, Owner'S Manual, Page: 29 / 66

Operation
29
warranty.
2. To prevent accidental spraying, engage the safety latch on spray gun
trigger by rotating it to the locked position.
3. Follow the instructions in the Engine Manual for starting the engine.
- If the engine doesn't start on the first try, pressure may build up in
the pump. Relieve pressure by squeezing the spray gun trigger
before attempting to start engine again. This will make starting
easier.
DANGER:
Do not inhale engine exhaust. It contains dangerous carbon monoxide
that can kill you.
Apply cleaning
chemical
(if desired)
If desired, spray cleaning chemical at low pressure (with or without
heated water).
1. Make sure the chemical injector is properly set up according to the
instructions in Step 2, "Set Up for Chemical Spraying".
2. Make sure the low pressure BLACK nozzle is attached before
beginning to spray chemicals --
Only the low pressure black nozzle will
allow chemicals to be drawn through the chemical injector into the
water stream.
Note regarding dual gun chemical spraying: You can spray
chemicals with one gun or both guns (with black nozzles inserted).
However, you cannot spray chemicals out of one gun and plain
water out of the other gun at the same time
–
the chemical-mixed
water flows to both hoses.
3. You can apply chemicals with either warm or cold water. Check
chemical label. If warm water is specified, start burner according to
instructions provided below.
4. Apply chemicals by squeezing the spray gun trigger. The chemical
injector will draw the chemical into the water stream.
5. The chemical concentration of the spray can be changed by turning the
chemical adjustment knob located on the chemical injector.
6. Apply chemicals evenly to the cleaning surface. Never use more
chemical than is necessary to clean the surface.
7. Allow the chemicals time to react with the dirt before rinsing.
8. Prepare to rinse by changing to a high-pressure nozzle. Changing the
nozzle from the low-pressure black nozzle to a high-pressure nozzle
will stop the flow of chemicals into the water stream.
Refer to instructions for selecting and changing the nozzle in Step1,
"Connect Hoses, Water Supply, and Nozzle".
9. Rinse with high-pressure spray, either hot or cold, as instructed in the
next page.