Installation Instructions - Hotsy 781SS Operating Instructions And Parts Manual

getting Started
IMPORTANT: Proper initial installation of equipment
will assure more satisfactory performance, longer
service life, and lower maintenance cost.
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 ap-
plicable federal and state laws, and local ordinances.
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
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inStaLLatiOn inStructiOnS

97-6642 • HOTSY 781SS, 871SS, 921SS • REV. 7/06
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
cause engine 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.
pre-Operation check
 Pump Oil (SAE 30W non-detergent oil)
 Cold Water Supply (3.5 gpm • 5/8" • 20 psi)
 Hose, wand, nozzles (nozzle size per serial plate)
 Water filter (intact, nonrestrictive)
 Engine fuel (unleaded 86 or higher)
 Engine oil (SAE 10W40)
 Burner fuel (No. 1 or No.2 home heating fuel or die-
sel)
F) can
o