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14. Hotsy will not be liable for any changes made to
our standard machines, or any components not pur-
chased from Hotsy.
15. Read engine safety instructions provided.
16. Never run pump dry or leave trigger gun closed longer
than 5 minutes.
17. Inlet water must be from a cold, clean fresh city
water supply.
WARNING: Only use recom-
WARNING
mended fuel. Using other fuels
may result in a serious explosion
causing personal injury, prop-
erty damage or loss of life.
18. Use No. 1 or No. 2 heating oil
RISK OF FIRE OR
EXPLOSION: USE
VAPOR FUEL ONLY.
result in a serious explosion. NEVER use crank-
case or waste oil in your burner assembly. Fuel unit
malfunction could result from contamination.
19. Do not confuse gasoline and fuel oil tanks. Keep
proper fuel in proper tank.
20. Protect machine from freezing.
21. Be certain all quick coupler fittings are secured be-
fore using pressure washer.
22. Do not allow acids, caustic or abrasive fluids to
pass through the pump.
23. To reduce the risk of injury, close supervision is nec-
essary when a product is used near children. Do not
allow children to operate the pressure washer. This
machine must be attended during operation.
24. Do not operate this product when fatigued or under
the influence of alcohol or drugs. Keep operating
area clear of all persons.
25. Protect high pressure hose from vehicle traffic and
sharp objects.
26. Before disconnecting high pressure hose from water
outlet, turn burner off and pull the trigger on the spray
gun allowing water to cool to below 100° F before
stopping machine. Then open the trigger gun to re-
lieve pressure. Failure to properly cool down or main-
tain the heating coil may result in a steam explosion.
27. Do not overreach or stand on unstable support. Keep
good footing and balance at all times.
28. This machine must be attended during operation.
INSTALLATION
Getting Started
IMPORTANT: Proper initial installation of equipment
will assure more satisfactory performance, longer
service life, and lower maintenance cost.
Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04
(ASTM D306) only. NEVER
use gasoline in your fuel oil
tank. Gasoline is more com-
bustible than fuel oil and could
IMPORTANT: The use of a backflow preventer on
the water supply hose is recommended and may be
required by local code.
The pressure washer should be run on a level surface and
in a protected area where it is not readily influenced by
outside forces such as strong winds, freezing temperatures,
rain, etc. The pressure washer should be located to assure
easy access for filling of fluids, adjustments and
maintenance. Normal precautions should be taken by the
operator to prevent moisture from reaching the pressure
washer. It is recommended that a partition be made between
the wash area and the pressure washer to prevent direct
spray from the wand from coming in contact with the
pressure washer. Moisture reaching the equipment will
reduce the pressure washer's service life. All installations
must comply with the local codes covering such installations.
Venting
DANGER: DO NOT run machine indoors or in an
enclosed area, as exhaust fumes may be hazardous
to your health.
DANGER: DO NOT operate machine in areas where
flammable vapors (gasoline, solvents, etc.) may be
present, as this machine may ignite the vapors.
CAUTION: All venting must be in accordance with
applicable federal and state laws, and local ordi-
nances. Consult local heating contractors.
If the pressure washer is to be used in an enclosed area, a
flue must be installed to vent burner and engine exhaust
to the outside atmosphere. Be sure the flue is the same
size as the burner exhaust vent on the pressure washer.
See Figure 1 for location. Poor draft will cause the pressure
washer to soot and not operate properly. When selecting
the location for installation, beware of poorly ventilated
locations or areas where exhaust fans may cause an
insufficient supply of oxygen. Proper combustion can only
be obtained when there is a sufficient supply of oxygen
available for the amount of fuel being burned. If it is
necessary to install the machine in a poorly ventilated
area, outside fresh air may have to be piped to the burner
and a fan installed to bring sufficient air into the machine.
Locate the pressure washer so that the flue will be as
straight as possible and protrude through the roof at a
proper height and location to provide adequate draft. This
oil fired pressure washer must have a draft regulator
installed in the flue (available from most heating
contractors). A draft regulator will permit proper upward
flow of exhaust flue gases.
In addition, the pressure washer should never be operated
in an enclosed area where high ambient temperatures exist.
High ambient temperatures (above 100
oil failure and will greatly reduce the engine's performance.
Gasoline Engine
The gasoline engine is preset for operation at altitudes
below 3000 feet above sea level. If operated at higher
altitudes, it may be necessary to install a high altitude
main jet in the carburetor. Contact an authorized engine
sales and service center for details.
o
F) can cause engine
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