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Operations

Installation Instructions

Getting Started

IMPORTANT: Proper initial installation of
equipment will assure more satisfactory perfor-
mance, 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 codes.

The pressure washer should be run on a level surface
and in a protected area where it is not readily influ-
enced 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, adjust-
ments 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 should
comply with the local codes covering such installations.

Venting

DANGER:

Do not run machine indoors or in an

enclosed area without proper ventilation, 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.

DANGER: Some gases are heavier than air and will
spill out on the floor in the time required for the
safety pilot valve to close off gas supply.

There-

fore, always provide adequate space and ventila-
tion around this pressure washer.

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 exhaust to
the outside atmosphere.

Be sure the flue is the same

size as the burner exhaust vent on the pressure washer
lid. 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 gas fired pressure washer must have a draft

diverter installed in the flue (available from most
heating contractors). A draft diverter will permit proper
upward flow of exhaust flue gases.

Using LP Vapor Fuel From A Portable
Bottle

CAUTION: Have a qualified gas service technician
install and service your equipment.

The model 771 has been factory built to use LP Vapor
fuel.

DO NOT USE LIQUID FUEL.

You will need the following items:

•

LP vapor fuel tank. We recommend using a
minimum 30-40 lb. bottle. Bottle must have a
shut-off valve.

•

LP gas hose. Four foot long minimum, 3/4"
inside diameter. Must have 3/4" male NPT
thread end to attach to machine. Available
through Hotsy, Part Number 707452. This hose
is supplied in the 771 Portable Gear/LP Bottle
Rack Kit, Part Number 280771.

•

Gas primary regulator.

Controls the pressure

from the gas bottle into the gas valve.

Regula-

tor must be capable of handling 376,000 BTU/
Hr. with an adjustment range of 12.0 to 14.0
water column inches.

Available through Hotsy,

Part Number 860178.

•

Gas pressure gauge or gas manometer

•

10" Adjustable wrench