Porter-Cable A17914-05-10-06 - Manual (Page 10)

10- ENG A17914
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
through the pressure washer.
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 can rise to a
dangerous level and may 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 and will void the pump
warranty.
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. The thermal relief
valve is part of the pump and is not
visible to the user.
Chemical Injection: Feeds cleaning
agents into the pump to mix with
the pressurized water and help in
cleaning.
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 op ti mum pres sure
and cleaning. If you need to lower the
pres sure, it can be accomplished by
these meth ods.
1. Back away from the sur face to
be cleaned. The further away you
are, the less the pressure will be
on the surface to be cleaned.
2. Change to a wider spray
pattern nozzle. See How to Use
Wand paragraph in this section-
-
DO NOT attempt
to increase pump
pressure. A higher pressure setting
than the factory set pressure may
damage pump.