MAINTENANCE
Rupture Disk:
If pressure from pump or thermal expansion should exceed safe limits, the rupture disk will burst allow- ing high pressure to be discharged through hose to ground. When disk ruptures it will need to be replaced. The replacement rupture disk should be torqued to 35 ft. lbs.
Fuel:
Use clean fuel oil that is not contaminated with water and debris. Replace fuel filter and drain tank every 100 hours of operation.
Use No. 1 or No. 2 Heating Oil (ASTM D306) only. NEVER use gasoline in your burner tank. Gasoline is more combustible than fuel oil and a serious explo- sion could result. NEVER use crankcase or waste oil in your burner. Fuel unit malfunction could result from contamination.
Fuel Control System:
These machines utilize a fuel solenoid valve located on the fuel pump to control the flow of fuel to the com- bustion chamber.This solenoid valve, which is normally closed, is activated by a flow switch when water is flow- ing through it.When an operator releases the trigger on the spray gun, the flow of water through the flow switch stops, turning off the current to the fuel solenoid. The solenoid then closes, shutting off the supply of fuel to the combustion chamber. Controlling the flow of fuel in this way allows for an instantaneous burn or no burn situation, thereby eliminating high and low water tem- peratures, and combustion smoke normally associated with machines incorporating a spray gun.
CAUTION: Periodic inspection is recommended to in- sure that the fuel solenoid valve functions properly.This can be done by operating the machine and checking to see that when the trigger on the spray gun is in the off position, the burner is not firing.
Electrode Setting:
(See illustration below.)
Burner Nozzle:
Keep the tip free of surface deposits by wiping it with a clean,
Air Adjustment:
Machines are preset and performance tested at the factory - elevation 100 feet. A
To adjust: Start machine and turn burner ON. Loosen two locking screws found in the air shutter openings (refer to illustration below) and close air shutter until black smoke appears from burner exhaust vent. Note air band position. Next, slowly open the air shutter until white smoke just starts to appear. Turn air shutter half- way back to the black smoke position previously noted. Tighten locking screws.
If the desired position cannot be obtained using only the air shutter, lock the air shutter in as close a position as can be obtained, then repeat the above procedure on the air band setting.
FUEL AIR ADJUSTMENT
Pressure |
|
Gauge |
|
Port | Air Band |
|
Air Band
Adjustment
PRESSURE WASHER OPERATOR’S MANUAL
5/32" |
1/4" |
Electrode
Screw
Return Line
Pressure
Adjustment
Screw
Pump
Top View
Nozzle
5/32" Side View
To Fuel
Tank
Periodically check wiring connections. If necessary to
adjust electrodes, use diagram.
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