620-622 • 9.800-187.0 • Rev. 9/10
7
PRESSURE WASHER
OPERATOR’S MANUAL
SET UP PROCEDURES
Place machine in a convenient location providing ample
support, drainage and room for maintenance.
Location:
1. Location of machine is important. Avoid installing
near combustible material or in poorly ventilated
areas. Machines are intended to be protected from
the outside environment.
2. Electrical connection to machine should be the
proper voltage, phase and amperage. See spec-
ifications for particular model. A power plug is
not provided to ensure proper connection by an
electrician.
3. Water source for machines should be supplied by a
5/8" I.D. garden hose with a city water pressure of
not less than 30 PSI. If the water supply is inade-
quate, or if the garden hose is kinked, the machine
will run very rough and the burner will not fire.
CAUTION: Use only fresh water in pressure
washer.
4. Fill diesel fuel tank with kerosene, No. 1 home
heating fuel or diesel.
OPERATING INSTRUCTIONS
1. Read safety, installation and preventative mainte-
nance instructions before starting machine.
2. Connect the water supply hose to the float tank
inlet swivel connector and turn on water supply.
3. Check fuel tank level.
4. Connect the high pressure hose quick coupler to
the discharge nipple by sliding quick coupler col-
lar back and inserting the quick coupler onto the
coupler nipple and pushing the quick coupler collar
forward to secure it.
5. Connect the wand, nozzle, hose and spray gun
(where applicable). Use teflon tape on pipe thread
connections to avoid water leaks (see component
identification).
6. Plug the power cord into the proper power supply.
(Refer to serial plate for information.)
7. Grip spray gun and wand handle securely.
8. Before installing pressure nozzle into wand
coupler, run machine allowing water to flush
through the system until clear.
9.
For auto start machines only: Press the pump
switch “ON” and then pull trigger on the spray gun
to activate pressure switch which starts machine.
When a steady stream of water flows from the
spray gun and wand, turn the thermostat knob
to the 200° mark, then push the burner switch.
(Burner will light automatically.)
For time delay shut down machines: Simply
press pump switch "ON" and the machine will
start.
10. Turn the variable pressure control handle
clockwise to increase pressure.
11. To apply detergent, place detergent hose into
detergent container and open detergent valve.
GENERAL WASHING
TECHNIQUES
These machines are equipped with a spray gun and
various nozzle patterns. Use the wide patterns on easy
soil removal jobs and the narrow patterns on the more
difficult jobs or tight areas such as cracks and holes.
In most cases faster results and better detergent
economy will be obtained by applying the detergent
and letting it “set” for a few minutes prior to rinsing.
This enables it to do its soil penetrating and loosening
work.
Most cleaning work terminates with a high pressure
rinse as part of the normal cleaning procedure. In
some cases, however, the last operation may be the
application of a detergent (a sanitizer, for example).
After such work, run the machine using rinse water for
20-30 seconds to clear the pump and lines.
SHUTDOWN PROCEDURES
1. Place detergent line in a bucket of clear water al-
lowing detergent to be flushed from system. Then
turn detergent valve off.
2. Push burner switch off and pull spray gun allowing
water to flow, which will cool down the heating
coil.
3. After water has cooled, release the trigger on the
spray gun, which will activate a timer to shut the
machine off after one minute. Turn the pump switch
off if the machine is going to be left unattended.
4. Turn water off.
5. Protect from freezing (see Winterizing
Procedures).
STEAM COMBINATION
1. Turn the steam unloader valve counterclockwise
lightly until you feel resistance. (Detergent will not
siphon when the steam unloader valve is open.)
NOTE: The steam mode is built into the unloader.
Just turn the unloader adjustment knob counter-
clockwise until you feel resistance.
OPERATING INSTRUCTIONS
