Maintenance

through pressure washer and into HPB coils and back into the bucket. Solution should be allowed to circulate 2-4 hours.

Step 4 After circulating solution flush entire system with fresh water.

Removal of Soot In Heating Coil:

In the heating process, fuel residue in the form of soot deposits may develop between the heating coil pipe and block air flow which will affect burner combustion. When soot has been detected on visual observation, the soot on the coil must be washed off after coil has been removed using the following steps:

1.Remove the tank head assembly by unscrewing the three tek screws and lifting the tank head off.

2.Remove the two pipe nipples and associated fit- tings.

3.Lift the coil out of the outer wrap.

CAUTION:The coil weighs about 80 lbs. Use proper lifting techniques.

4.Clean, repair and replace the coil by reversing the above steps.

Coil Reinstallation

Reinstall by reversing the above steps 4 through 1.

Rupture Disk

If pressure from pump or thermal expansion should exceed safe limits, the rupture disk will burst, allowing high pressure to be discharged through hose to ground. When the disk ruptures, it will need to be replaced.

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 Kerosene No. 1 or No. 2 Heat- ing Fuel (ASTM D306) or diesel only. NEVER use gaso- line in your burner tank. Gasoline is more combustible than fuel oil and could result in a serious explosion. NEVER use crankcase or waste oil in your burner. Fuel unit malfunction could result from contamination.

Ignition Circuit:

Periodically inspect wires, spring contact and electrodes for condition, security and proper spacing. For trans- former test (CAUTION 10,000VOLTS) use defect free

insulated screwdriver and keep fingers off blade! Lay blade across one contact: OK if arc will span 1/2" be- tween end of blade and other contact.

Electrode Setting - Wayne:

(See illustration below)

Gap 1/8"

1/8"

Electrodes

3/8"
1/2"	2-7/8"
3/16"	Nozzle
	Adapter

Top View

Side View

Electrodes Check: Periodically check wiring connections. If necessary to adjust electrodes, use diagram.

Electrode Setting - Beckett:

(See illustration below)

5/32" Gap	Electrode
5/16"
	Nozzles
	1/16"
Top View	Side View

Electrodes Check: Periodically check wiring connections. If necessary to adjust electrodes, use diagram.

Burner Nozzle:

Keep the tip free of surface deposits by wiping it with a clean, solvent-saturated cloth, being careful not to plug or enlarge the nozzle. For maximum efficiency, replace the nozzle each season.

Fuel Control System:

This machine utilizes a fuel solenoid valve located on the fuel pump to control the flow of fuel to the combus- tion chamber. This solenoid is activated by a pressure switch located on the unloader valve. When an operator releases the trigger on the spray gun, the pressure drops, allowing the pressure switch to activate the fuel sole- noid.The solenoid then closes, shutting off the supply of fuel to the combustion chamber. Controlling the flow of fuel in this way gives 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.Periodic inspec- tion is recommended to insure that the fuel solenoid valve

PRESSURE WASHER OPERATOR’S MANUAL

97-6068, 97-6131 • REV. 3/06

HPB-3530, HPB-2011, HPB-4020, HPB-3520 specifications

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