North Star M157310AC.1, Owner'S Manual

Page: 27 / 56

Operation
27
Start engine Start the engine to power the pump.
1. Make sure water supply is connected and primed.
CAUTION: Running the pump dry will cause damage and void the 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 3, "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.
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 Step 1,
"Connect Hoses, Water Supply, and Nozzle".
9. Rinse with high-pressure spray, either hot or cold, as instructed below.
Turn on
burner
(If hot spray or
steam is
desired)
If HOT spray or steam is desired, turn on the burner:
1. First make sure vicinity is free of flammable vapors, dust, gases, or other
potentially combustible materials. Operate only where open flame or torch
is permitted.
2. Make sure there is fuel in the burner fuel tank.