North Star M157116C.2 Owner's Manual page 27

Apply cleaning If desired, spray cleaning chemical at low pressure (with or without heated water).
chemical
(if desired) 1. Make sure the chemical injector is properly set up according to the instructions in
2. Make sure the low-pressure BLACK nozzle is attached before beginning to spray
3. You can apply chemicals with either warm or cold water. Check chemical label.
4. Apply chemicals by squeezing the spray gun trigger. The chemical injector will
5. Apply chemicals evenly to the cleaning surface. Never use more chemical than is
6. Allow the chemicals time to react with the dirt before rinsing.
7. Prepare to rinse by changing to a high-pressure nozzle. Changing the nozzle from
8. Rinse with high-pressure spray, either hot or cold, as instructed below.
Turn on burner
If HOT spray or steam is desired, turn on the burner:
(If hot spray or
1.
steam is desired)
2.
3.
Operation
Step 2, "Set Up for Chemical Spraying".
chemicals -- Only the low-pressure black nozzle will allow chemicals to be drawn
through the chemical injector into the water stream.
If warm water is specified, start burner according to instructions provided below.
draw the chemical into the water stream.
necessary to clean the surface.
the low-pressure black nozzle to a high-pressure nozzle will stop the flow of
chemicals into the water stream.
Refer to instructions in section select spray nozzle in Step 1, "Connect Hoses,
Water Supply, and spray Nozzle".
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.
Make sure there is fuel in the burner fuel tank.
CAUTION: Do not run the machine in hot mode without fuel in the burner's
fuel tank, or damage can occur.
Always keep at least 1/2 gallon (approximately .75") of fuel in the burner fuel
tank, even when running in cold mode. This will ensure the burner fuel pump
is properly lubricated.
NOTE: Engine must be at full throttle before turning on Heat Switch. If the
throttle is not at full, the engine will not supply adequate air to the burner,
resulting in poor or no combustion.
Turn the heat switch ON and adjust the thermostat to the desired temperature.
(For steam spraying, set the temperature at 212F or higher and use orange
steam nozzle.)
WARNING:
• NEVER attempt to immediately run or re-light the burner if it does
not ignite the first time. Unburned fuel or gas in burner may have
accumulated, causing potential explosion or fire hazard.
• Do not attempt to set temperature limit above the preset limit.
• Never touch hot burner surfaces and stay clear of burner exhaust.
All are extremely hot and will burn you.
• Do not inhale burner exhaust. It contains dangerous carbon
monoxide that can kill you.
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