Delta D28569 User Manual download pdf (Page 10)

10- ENG

D28569

PRESSURE WASHER TERMINOLOGY

PSI: Pounds per Square Inch. The unit of measure for water pressure. Also used

for air pressure, hydraulic pressure, etc.

GPM: Gallons Per Minute. The unit of measure for the flow rate of water.

CU: Cleaning Units. GPM multiplied by PSI.

Bypass Mode: In Bypass Mode, the pump is recirculating water because the

trigger of the spray gun is not pulled. If unit is left in bypass mode for more than

two (2) minutes, the water temperature will rise to a dangerous level and could

damage internal components of the pump. Any damage to pump due to these

causes will not be covered under warranty.

DO NOT allow your unit to operate in bypass mode for more

than two minutes at any time. Overheating of pump can

cause damage to pump.

Thermal Relief Valve: In an effort to prevent extreme damage,

pumps are equipped with a thermal relief valve. This valve will

open when the temperature inside the pump rises too high. This

valve will then release a gush of water in an effort to lower the

temperature inside the pump. Immediately after this occurs, the

valve will close.

Chemical Injection System: Mixes cleaners or cleaning solvents with the

pressurized water to improve cleaning effectiveness.

Water Supply: All pressure washers must have a source of water. The minimum

requirements for a water supply are 20 PSI and 5 gallons per minute.

PRESSURE WASHER OPERATING FEATURES

PRESSURE ADJUSTMENTS

The pressure setting is preset at the factory to achieve optimum pressure and

cleaning. If you need to lower the pressure, it can be accomplished by these

methods.

1. Back away from the surface to be cleaned. The further away you are, the

less the pressure will be on the surface to be cleaned.

2. Change to the 40º nozzle - white, this nozzle delivers a less powerful

stream of water and a wider spray pattern.

DO NOT attempt to increase pump pressure. A higher

pressure setting than the factory set pressure may

damage pump.

3. Adjust the pressure regulator on the pump. Turn the

pressure regulator knob counterclockwise to lower

pressure. Refer to the illustrations to identify your pres-

sure regulator. Once you have finished using your pres-

sure washer, return the pressure regulator to its original

position by turning it clockwise.

DO NOT try to turn pressure regulator knob

past the built-in stop or damage to pump

will result.

Pressure

Regulator

Knob

Thermal

Relief

Valve

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 59 60

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Delta D28569 User Manual Page 10

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