Pressure Washer Terminology - Delta D2700K Guide De L'utilisateur

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.
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.
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.
D28569
DO NOT allow your unit to operate in bypass mode for more
than two minutes at any time. Overheating of pump can
DO NOT attempt to increase pump pressure. A higher
pressure setting than the factory set pressure may
damage pump.
DO NOT try to turn pressure regulator knob
past the built-in stop or damage to pump
will result.
10- ENG
Thermal
Relief
Valve
Pressure
Regulator
Knob