18StrainerChemical InjectorDilutedChemicalCAUTION: Chemical mixtureThe special NorthStar braided chemical hose whenplaced within a liquid and attached at the pump’schemical injection port will inject 1 part chemical to 15parts water. Chemicals must be pre-diluted inaccordance to instructions to accommodate theadditional 15:1 dilution ratio which will occur in thepump.Chemical Spraying Preparation: Prepare (dilute) cleaning solution as required forthe job. (Recall that this chemical solution will beautomatically mixed in the pump with water at aratio of 15 parts water to 1 part diluted chemicalsolution.) Press braided chemical hose over the pump’schemical injector. Submerge suction strainer connected to braidedchemical hose into chemical solution bucket. Make sure the BLACK nozzle is attached to spraywand before beginning to spray chemicals –High-pressure nozzles cannot apply chemicals. Warm or cold water can be used. If warm wateris specified on chemical label, start burneraccording to the instructions in the followingsection, “Hot Spray Procedure.”Chemical Spraying Procedure: Disengage safety latch and apply chemicalsevenly to the cleaning surface working frombottom upward, using long, even, overlappingpasses. Allow chemicals time to react with dirt beforerinsing. Do not allow the chemical to dry on,reapply as needed to prevent surface from drying.Rinsing: Change to a high-pressure nozzle for rinsing.Changing to a high-pressure nozzle willautomatically stop the flow of chemicals into thewater stream. Rinse with high-pressure spray, either hot or cold. Turn heat switch ON and adjust thermostat to desiredtemperature. (For steam spraying, set temperature at212F or higher and use YELLOW nozzle.) Burner will only fire as trigger is squeezed – followinstructions for spraying.Figure 13Hot Spray ProcedureCAUTION: Metal burn hazardUse of burner will make spray gun hot. Avoid touchingwand. Serious burns from hot metal could occur iftouched. Before starting burner, make sure vicinity is free offlammable vapors, dust, gases, or other potentiallycombustible materials. Operate only where openflame or torch is permitted and neither flammablevapors nor combustible objects are present. Ensure there is fuel in burner fuel tank. Wait before re-lighting burner. NEVER attempt toimmediately re-light the burner if it doesn’t ignite thefirst time. Unburned oil or gas may haveaccumulated, causing potential explosion or firehazard. Burner automatically turns off when trigger isreleased or when temperature setting is reached.Note: If burner exhaust is white, adjust burner forpeak performance. See “Oil Burner Adjustment”section towards the back of this manual.