Hotsy 1075BE CAL User manual

8.931-236.0 - BD 03/01/23
965B, 1075BE, 1080BE Series
Hot Water - Gas Engine
Operator’s Manual Pressure Washer
CHAUD!
MODELS: 965B
1.110-565.0
1075BE
1.110-566.0
1075BE CAL
1.110-082.0
1080BE
1.110-567.0
1080BEK
1.110-094.0
For the Hotsy Dealer nearest you,
consult our web page at
www.hotsy.com

2 Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD
Machine Data Label

3
Table of Contents
Machine Data Label . . . . . . . . . . . . . . . . . . . . . . . . . .2
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
How To Use This Manual . . . . . . . . . . . . . . . . . . . . . 4
Safety
Introduction & Safety Information . . . . . . . . . . . . . . . 5
IMPORTANT SAFETY INFORMATION . . . . . . . . . .6
Operations
Technical Specifications . . . . . . . . . . . . . . . . . . . . . .9
Component Identification . . . . . . . . . . . . . . . . . . . . 10
Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . .11
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Oil Fired Burner. . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Gasoline Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Water Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Operation Instructions. . . . . . . . . . . . . . . . . . . . . . .14
Detergents & General Washing Techniques. . . . . .15
Thermal Pump Protection . . . . . . . . . . . . . . . . . . . .15
Cleaning Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Rinsing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Shutdown Instructions & Storage . . . . . . . . . . . . . . 16
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Maintenance
Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Burner Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Heating Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Engine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Oil Burner Blower Motor . . . . . . . . . . . . . . . . . . . . .17
Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Parts
Wiring Diagram - 965B All Models . . . . . . . . . . . . 21
Wiring Diagram -1075SSBE . . . . . . . . . . . . . . . . . 22
Wiring Diagram - 1080SSBE . . . . . . . . . . . . . . . . 23
Wiring Diagram - 1075BE CAL . . . . . . . . . . . . . . . 24
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD

4
How To Use This Manual
This manual contains the following sections:
• How to Use This Manual
• Safety
• Operations
• Maintenance
• Parts List
The HOW TO USE THIS MANUAL section will tell you
how to find important information for ordering correct
repair parts.
Parts may be ordered from authorized dealers. When
placing an order for parts, the machine model and
machine serial number are important. Refer to the
MACHINE DATA box which is filled out during the
installation of your machine. The MACHINE DATA box
is located on the inside of the front cover of this manual.
The model and serial numbers will be found on a decal
attached to the pressure washer. You should record
both serial number and date of purchase and keep in a
safe place for future reference.
The SAFETY section contains important information
regarding hazardous or unsafe practices of the
machine. Levels of hazards are identified that could
result in product damage, personal injury, or severe
injury resulting in death.
The OPERATIONS section is to familiarize the operator
with the operation and function of the machine.
The MAINTENANCE section contains preventive main-
tenance to keep the machine and its components in
good working condition. They are listed in this general
order:
• Pump
• Burner Fuel Filter
• Heating Coil
• Engine
• Oil Burner Blower Motor
• Battery
• Troubleshooting
The PARTS LIST section contains assembled parts
illustrations and corresponding parts list. The parts lists
include a number of columns of information:
•REF – column refers to the reference number
on the parts illustration.
•PART NO. – column lists the part number for
the part.
•QTY – column lists the quantity of the part used
in that area of the machine.
•DESCRIPTION – column is a brief description
of the part.
•NOTES – column for information not noted by
the other columns.
NOTE: If a service or option kit is installed on your
machine, be sure to keep the KIT INSTRUCTIONS
which came with the kit. It contains replacement parts
numbers needed for ordering future parts.
NOTE: The manual part number is located on the
lower right corner of the front cover.
Model:
Date of Purchase:
Serial Number:
Dealer:
Address:
Phone Number:
Sales Representative:
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD

5
Safety
Introduction & Safety Information
Thank you for purchasing this Pressure Washer. We
reserve the right to make changes at any time
without incurring any obligation.
Owner/User Responsibility:
The owner and/or user must have an understanding of
the manufacturer’s operating instructions and warnings
before using this pressure washer. Warning information
should be emphasized and understood. If the operator
is not fluent in English, the manufacturer’s instructions
and warnings shall be read to and discussed with the
operator in the operator’s native language by the
purchaser/owner, making sure that the operator
comprehends its contents. Owner and/or user must
study and maintain for future reference the manufac-
turers’ instructions. The operator must know how to
stop the machine quickly and understand the operation
of all controls. Never permit anyone to operate the
engine without proper instructions.
SAVE THESE INSTRUCTIONS
This manual should be considered a permanent
part of the machine and should remain with it if
machine is resold.
When ordering parts, please specify model and
serial number. Use only identical replacement
parts. This machine is to be used only by trained
operators.
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD

6
Safety
IMPORTANT SAFETY INFORMATION
WARNING: To reduce the risk of
injury, read operating instructions
carefully before using.
AVERTISSEMENT: Pour réduire le
risque de blessures, lire
attentivement les instructions de
fonctionnement avant l'utilisation
1.Read the owner's manual thor-
oughly. Failure to follow instructions
could cause malfunction of the machine and result
in death, serious bodily injury and/or property
damage.
2. Know how to stop the machine and bleed pressure
quickly. Be thoroughly familiar with the controls.
3. Stay alert — watch what you are doing.
DANGER: Keep wand, hose, and
water spray away from electric
wiring or fatal electric shock may
result.
DANGER: Garder la lance, le
boyau et le jet d'eau à l'écart de
tout câblage électrique ou des
chocs électriques mortels
pourraient survenir
4. All installations must comply with local codes.
Contact your electrician, plumber, utility company
or the selling dealer for specific details.
WARNING: This machine exceeds
85 db appropriate ear protection
must be.
AVERTISSEMENT: Cette machine
excède 85 dB et une protection de
l'ouïe appropriée doit être portée.
WARNING: High pressure spray
can cause paint chips or other
particles to become airborne and
fly at high speeds. To avoid
personal injury, eye, hand and foot
safety devices must be worn.
AVERTISSEMENT: Un jet haute
pression peut écailler la peinture
ou provoquer l'émission d'autres
particules dans l'air et leur projection à hautes
vitesses. Pour éviter les lésions corporelles, une
protection des yeux, du visage, des mains et des
pieds doit être portée lors de l'utilisation de cet
équipement.
5. Always wear properly rated eye protection such as
safety goggles or face shield while spraying.
(Safety glasses do not provide full protection.).
6. Keep operating area clear of all persons.
WARNING: Flammable liquids can
create fumes which can ignite,
causing property damage or
severe injury.
AVERTISSEMENT: Des liquides
inflammables peuvent produire
des vapeurs qui peuvent
s'enflammer, causant ainsi des
dommages à la propriété ou des
blessures graves.
WARNING: Risk of explosion — Operate only
where open flame or torch is permitted.
AVERTISSEMENT: Risque d'explosion- Utiliser
uniquement dans des endroits où l'utilisation d'une
flamme nue ou d'une torche est permise.
WARNING: Risk of fire — Do not add fuel when the
product is operating or still hot.
AVERTISSEMENT: Ne pas changer les réservoirs
pendant que le produit est en marche ou encore
chaud.
WARNING: Do not use gasoline crankcase draining
or oil containing gasoline, solvents or alcohol.
Doing so will result in fire and/or explosion.
AVERTISSEMENT: Ne pas utiliser d'essence, de
drainage du carter de moteur ou d'essence contenant
de l'huile, de solvants ou de l'alcool. Agir de la sorte
risquerait de créer un incendie et/ou une explosion.
WARNING: Risk of fire — Do not
Spray flammable liquids.
AVERTISSEMENT: Risque
d'incendie — Ne pas pulvériser de
liquides inflammables.
7.Allow engine to cool for 2 minutes
before refueling. If any fuel is spilled,
make sure the area is dry before
testing the spark plug or starting the
WARNING
READ OPERATOR’S
MANUAL THOROUGHLY
PRIOR TO USE.
OPERATIONS
SAFETY
MAINTENANCE
DANGER
KEEP WATER
SPRAY AWAY FROM
ELECTRICAL WIRING.
WARNING
EAR PROTECTION
MUST BE WORN
WARNING
USE PROTECTIVE
EYE WEAR
AND CLOTHING
WHEN OPERATING
THIS EQUIPMENT.
WARNING
RISK OF FIRE.
DO NOT ADD FUEL
WHEN OPERATING
MACHINE.
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD
WARNING
RISK OF EXPLOSION:
OPERATE ONLY WHERE
OPEN FLAME OR TORCH
IS PERMITTED

7
Safety
engine. (Fire and/or explosion may occur if this is
not done.)
Gasoline engines on mobile or portable equipment
shall be refueled:
a. outdoors;
b. with the engine on the equipment stopped;
c. with no source of ignition within 10 feet of the
dispensing point; and
d. with an allowance made for expansion of the
fuel should the equipment be exposed to a
higher ambient temperature.
In an overfilling situation, additional precautions are
necessary to ensure that the situation is handled in a
safe manner.
WARNING: Risk of injury. Disconnect battery
ground terminal before servicing.
AVERTISSEMENT: Risque de blessures. Débrancher
la borne de mise à la terre de la batterie avant de
procéder à des opérations d'entretien.
8. When in use, do not place machine near
flammable objects as the engine is hot.
9. Oil burning appliances shall be installed only in
locations where combustible dusts and flammable
gases or vapors are not present. Do not store or
use gasoline near this machine.
10. Use No. 1 or No. 2 heating oil (ASTM D306) only.
NEVER use gasoline in your fuel oil tank. Gasoline
is more combustible than fuel oil and could result in
a serious explosion. NEVER use crankcase or
waste oil in your burner. Fuel unit malfunction could
result from contamination.
11. Do not confuse gasoline and fuel oil tanks. Keep
proper fuel in proper tank.
WARNING: Risk of injury. Hot
surfaces can cause burns. Use
only designated gripping areas of
spray gun and wand. Do not place
hands or feet on non-insulated
areas of the pressure washer.
AVERTISSEMENT: Risque de
blessures. Les surfaces chaudes
peuvent causer des brûlures.
Utiliser uniquement les zones de prise désignées
du pistolet pulvérisateur et de la lance. Ne pas
placer les mains ou les pieds sur des endroits non
isolés de la laveuse à pression.
12. Transport/Repair with fuel tank EMPTY or with fuel
shut-off valve OFF.
CAUTION: Hot discharge fluid. Do
not touch or direct discharge
stream at persons.
ATTENTION: Liquide de décharge
chaud. Ne pas toucher ou
décharger directement le jet vers
des personnes ou des
animaux,car cela risquerait de
causer des blessures graves ou
même la mort.
WARNING: This machine produces hot water and
must have insulated components attached to
protect the operator.
AVERTISSEMENT: Cette machine produit de l'eau
chaude et doit comporter des composants isolés
attachés pour protéger l'opérateur.
13. To reduce the risk of injury, close supervision is
necessary when a machine is used near children.
Do not allow children to operate the pressure
washer. This machine must be attended during
operation.
WARNING: Grip cleaning wand
securely with both hands before
starting. Failure to do this could
result in injury from a whipping
wand.
AVERTISSEMENT: Agripper la
lance de nettoyage avec les deux
mains avant de commencer. Le
non-respect de cette consigne
pourrait mener à des blessures
causées par le mouvement violent de la lance.
14. Never make adjustments on machine while in
operation.
15. Be certain all quick coupler fittings are secured
before using pressure washer.
WARNING: High pressure
developed by these machines will
cause personal injury or
equipment damage. Keep clear of
nozzle. Use caution when oper-
ating. Do not direct discharge
stream at people and animals, or
severe injury or death will result.
CAUTION
HOT DISCHARGE FLUID:
DO NOT TOUCH OR
DIRECT DISCHARGE
STEAM AT PERSONS.
WARNING
TRIGGER GUN KICKS
BACK — HOLD WITH
BOTH HANDS
WARNING
RISK OF INJECTION
OR SEVERE INJURY
TO PERSONS. KEEP
CLEAR OF NOZZLE.
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD
WARNING
RISK OF INJURY.
HOT SURFACES
CAN CAUSE BURNS

8
Safety
AVERTISSEMENT: La haute pression générée par ces
machines causera des lésions corporelles ou des
dommages à l'équipement. Se tenir à l'écart de la
buse. Faire preuve de prudence lors de l'utilis ation.
Ne pas décharger directement le jet vers des
personnes ou des animaux, car cela risquerait de
causer des blessures graves ou même la mort.
WARNING: Protect machine from
freezing.
AVERTISSEMENT: Protéger la
machine contre le gel.
16.To keep machine in best
operating conditions, it is important
you protect machine from freezing.
Failure to protect machine from
freezing could cause malfunction of
the machine and result in death, serious bodily
injury, and/or property damage. Follow storage
instructions specified in this manual.
17. Inlet water must be clean fresh water and no hotter
then 90°F.
WARNING: Risk of asphyxiation.
Use this product only in a well
ventilated area.
AVERTISSEMENT: Risque
d'asphyxie. Ne pas inhaler les
vapeurs.
18.Running this product indoors can
result in death due to carbon
monoxide, a poisonous gas you cannot see or
smell. Never operate indoors, even if windows and
doors are open. Only use outdoor and far away
from windows, doors, and openings or vents.
19. Manufacturer will not be liable for any changes
made to our standard machines or any components
not purchased from us.
The best insurance against an accident is precaution
and knowledge of the machine.
WARNING: Be extremely careful
when using a ladder, scaffolding
or any other relatively unstable
location. The cleaning area should
have adequate slopes and
drainage to reduce the possibility
of a fall due to slippery surfaces.
Do not allow acids, caustic or abrasive fluids to
pass through the pump.
AVERTISSEMENT: Faire preuve d'une extrême
prudence au moment d'utiliser une échelle, des
échafaudages ou toute autre surface relativement
instable. La zone de nettoyage doit avoir une pente
et un drainage adéquats pour réduire la possibilité
d'une chute due à une surface glissante.
20. Never run pump dry or leave spray gun closed
22. longer than 1-2 minutes.Machines with shut-off
spray gun should not be operated with the spray
gun in the off position for extensive periods of time
as this may cause damage to the pump.
23. Protect discharge hose from vehicle traffic and
sharp objects. Inspect condition of high pressure
hose before using or bodily injury may result.
24. Before disconnecting discharge hose from water
outlet, turn burner off and open spray gun to allow
water to cool below 100° before stopping the
machine. Then open the spray gun to relieve
pressure. Failure to properly cool down or maintain
the heating coil may result in a steam explosion.
25. Do not overreach or stand on unstable support.
Keep good footing and balance at all times.
26. Do not operate this machine when fatigued or
under the influence of alcohol, prescription medica-
tions, or drugs.
27. Use only kerosene, No. 1 home heating fuel, or
diesel in burner fuel tank. If diesel is used, add a
soot remover to every tankful.
WARNING: Do not spray machine or any people,
animals or electrical parts.
AVERTISSEMENT: Ne pas vaporiser
sur la machine ou les gens, les
animaux ou les pièces électriques.
Follow the maintenance instructions
specified in the manual.
Technical Specifications
WARNING
PROCTECT FROM
FREEZING
WARNING
RISK OF
ASPHYXIATION.
USE THIS PRODUCT
ONLY IN A WELL
VENTILATED AREA.
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD
WARNING
DO NOT SPRAY
MACHINE OR ANY
PEOPLE, ANIMALS OR
ELECTRICAL PARTS.
WARNING
RISK OF INJURY
FROM FALLS WHEN
USING LADDER.

9
Operations
Model # Pump Volume @
Pump Head
Pump Pressure at
Pump Head Burner Type Burner Exhaust
Stack
1075BE/
BE CAL 3.8 GPM 3500 PSI Fuel Oil Fired,
338,300 BTU/HR 8”
965B 3 GPM 3000 PSI Fuel Oil Fired,
309,900 BTU/HR 8”
1080BE/
BEK 4.6 GPM 3500 PSI Fuel Oil Fired,
338,300 BTU/HR 8”
Model # Machine Power Machine Weight Shipping Weight Machine Dimensions
965B Honda GX270 535 Lbs 650 Lbs L 42” X W 27.5” X H 39”
1075BE Honda GX390 560 Lbs 625 Lbs L 42” X W 27.5” X H 39”
1075BE
CAL Vanguard 14HP 560 Lbs 625 Lbs L 42” X W 27.5” X H 39”
1080BE Vanguard 16HP 555 Lbs 655 Lbs L 42” X W 27.5” X H 39”
1080BEK Karcher V-Twin 590 Lbs 690 Lbs L 42” X W 27.5” X H 39”
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD

10
Operations
Component Identification
Pump — Delivers a specific gpm to the high pressure
nozzle which develops pressure.
Spray Gun — Controls the application of water and
detergent onto cleaning surface with trigger device.
Includes safety latch.
Wand — Must be connected to the spray gun.
High Pressure Hose — Connect one end to water
pump high pressure discharge nipple and the other end
to spray gun.
Unloader Valve — Safety device which, when the
spray gun closes, prevents over pressurization.
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD
CHAUD!
Burner
Exhaust
Relief
Valve
Pump
Unloader
Valve
Control Bo
x
Fuel Oil
Tank
Gasoline
Tank
High
Pressure
Hose
Spr
ay
Gun
Spray Wand

11
Operations
Assembly Instructions
Unpacking
Unpack carefully. Wear safety glasses or goggles while
unpacking, assembling, or operating pressure washer.
If there are missing components or hidden damage,
immediately contact carrier concerning discrepancies.
Parts Included
• Pressure Washer
• Pressure Hose
• Pressure Nozzles (3 Ea.)
• Wand
• Trigger Gun
• Operations Manual
• Gasoline Engine Manual
Pressure Hose, Trigger Gun and Wand
1. Install the pressure hose on the pressure washer
as shown.
NOTE: The pressure nozzle is not to be installed at
this time.
2. Assemble wand components as shown below.
3. Make sure all connections are secure.
Installation
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 back-flow 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 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 fluids, adjust-
ment 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 high-
pressure wand from coming in contact with the
pressure washer. Moisture reaching the pressure
washer will reduce its service life. All installations
should comply with the local codes covering such
installations.
IMPORTANT: DO NOT run machine indoors or in an
enclosed area where high ambient temperatures
exist. High ambient temperatures (above 100° F)
can cause engine oil failure and will greatly reduce
the engine’s performance.
Venting
CAUTION: All venting must be in accordance with
applicable federal and state laws, and local ordi-
nances. Consult local heating contractors.
ATTENTION: Toute la ventilation doit être conforme
aux lois fédérales et de l'État ou de la province, et aux
réglementations locales applicables.
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 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 combus-
tion can only be obtained when there is a sufficient
supply of oxygen available for the amount of fuel being
burned.
High
Pressure
Nozzle
Wand
Spray Gun
High Pressure Hose
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD
Hose Quick
Disconnect
Outlet
Nipple
Relief
Valve
Manifold
Coil Outlet
Discharge

12
Operations
If it is necessary to install the machine in a poorly venti-
lated area, outside fresh air will have to be supplied to
the machine. Locate the pressure washer so that the
flue will be as straight as 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.
Battery
WARNING: Batteries generate explosive gases
during normal battery operation. DO NOT expose
the battery to flame or sparks as these gases may
ignite.
AVERTISSEMENT: Les batteries génèrent des gaz
explosifs au cours de leur fonctionnement normal. NE
PAS exposer la batterie aux flammes ou aux étince-
lles, car ces gaz pourraient s'enflammer.
WARNING: Battery fluid is highly acidic. If battery
fluid contacts skin or clothing, wash immediately
with soap and water. If battery fluid enters eye,
immediately flood eye with running cold water for
at least 15 minutes and get immediate medical
attention.
AVERTISSEMENT: Le liquide de batterie est très
acide. Si le liquide de batterie entre en contact avec la
peau ou les vête ments, laver immédiatement à l'eau
et au savon. Si le liquide de la batterie entre en
contact avec les yeux, rincer immédiatement les yeux
avec de l'eau froide pendant au moins 15 minutes,
puis obtenir des soins médicaux immédiats.
1. Install battery (not included) in battery box as
shown. Use a standard automotive battery 45 AH
minimum 500 CCA (Cold Cranking Amps).
2. To reduce the possibility of sparking attach the
battery cables in the following order. First attach
the positive battery cable (red) to the positive “+”
terminal of the battery. Next, attach the negative
battery cable (black) to the negative “-” terminal of
the battery. To disconnect the battery, remove the
cables in the opposite order as installed.
3. Install battery box lid and secure with strap
provided.
Oil Fired Burner
Burner Air Adjustment: The oil burner on this
machine is preset for operation at altitudes near 500
feet. If operated at higher altitudes, it may be necessary
to adjust the air band for a #1 or #2 smoke spot on the
Bacharach scale.
To adjust, Loosen locking screw found on the air band.
Start machine and turn burner ON and close air band
until black smoke appears from burner exhaust vent.
Note air band position. Next, slowly open the air band
until white smoke just starts to appear and note air
band position, again. Rotate the air band halfway
between to the previously noted positions. Tighten
locking screws. Typical distance from the ‘black smoke’
position is roughly 3/8”-1/2” more open from the point of
visible black smoke, but may vary based upon local
operating conditions.
• For higher altitudes, the air band opening may
need to be increased; for lower altitude, the air
band may need to be decreased.
• For higher humidity, the air band opening may
need to be increased; for lower relative
humidity, the air band may need to be
decreased.
• For higher ambient temperatures the air band
opening may need to be increased; for lower
ambient temperatures, the air band opening
may need to be decreased.
Adjust the burner to your operating location’s environ-
ment as-needed for best smoke spot and performance
compliant with local, state, and federal regulations.
Example: a unit preset at a factory at 1700 feet altitude
with an air band of 1.1” and fuel pressure of 190 PSI
with Ambient temperature of 72 °F and a relative
humidity of 84% using #2 Diesel fuel oil. The unit is
shipped to a location at 5300 feet altitude with ambient
air temperature of 59 °F and a relative humidity of 25%.
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD
Black
Cable
Red
Cable

13
Operations
The air band required adjustment to 1.8” opening and
fuel pressure lowered to 150 PSI for a high altitude
adjustment for both heat input adjustments and
combustion air intake with the same fuel type.
Fuel Pressure Adjustment:
To adjust fuel pressure, First install a pressure gage
into the port just after the pump fuel exit. Turn the
adjusting screw (located at the regulator port)
clockwise to increase, and counterclockwise to
decrease. Do not exceed 200 psi or lower the pressure
below 130 PSI, when checked at the post-pump
pressure port.
The fuel pressure may need to be adjusted due to
altitude. For every 500 ft altitude above sea level, the
boiling point of water goes down 1 °F. At high altitude
environments, this boiling point change may require
the heat input to be lowered so the water input does
not turn to steam earlier than at the factory settings and
activate the pressure sensors and pressure relief
equipment when the unit is operated and much higher
altitudes from factory settings or local dealer site
settings. Check with your dealer before making local
site fuel pressure adjustments.
Also, as ambient temperature changes seasonally, the
fuel temperature in the feed tank and air temperature
inlet can impact fuel flow. In more extreme
temperatures, this local-site adjustment may also
require different fuel nozzles for fuel inlet temperatures
that are at seasonal extremes (higher or lower) in
locations where the temperature changes are beyond
moderate temperatures of between 40°F and 90°F.
Colder temperatures will make for a thicker flow and
less fine a fuel spray while hotter temperatures will
make for a thinner flow a more fine spray with the same
nozzle. Consider alternate nozzle configurations from
the baseline factory-supplied nozzle for operating in
such temperature extremes if performance is not
meeting needs with air band and fuel pressure settings
alone.
NOTE: When changing fuel pump, a by-pass plug
must be installed in return line port or fuel pump will
not prime.
Electrode Setting
Burner Nozzle
Keep the tip free of surface deposits by wiping it with a
clean, solvent-saturated cloth, being careful not to plug
or enlarge the nozzle. For maximum efficiency, replace
the nozzle each season.
Gun Setting Instructions
For EHASR Only
SR-Series gage KNA Part
Number 8.717-379.0
CAUTION: If white smoke appears from burner
exhaust vent during start-up or operation, discon-
tinue use and readjust air bands.
ATTENTION: Si de la fumée blanche s'échappe de
l'évacuation du brûleur pendant le démarrage ou le
fonctionnement, cesser d'utiliser et réajuster les
bandes d'air.
NOTE: If a flue is installed, have a professional
serviceman adjust your burner for a #1 or #2 smoke
spot on the Bacharach scale.
Gasoline Engine
This 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.
Water Supply
This machine is designed to be connected to a pressur-
ized (20 to 100 PSI) water supply, capable of maintaining
a minimum of 6.0 GPM. If it is necessary to use a gravity
feed water tank, the following plumbing modifications will
be required.
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14
Operations
A 1/2” NPT 3-way ball valve will need to be installed in
the water inlet line. Hotsy recommends the use of Watts
Regulator Valve #1/2 B6780 M1 (Hotsy P/N 921363) for
this application. With this valve in place this machine
will be capable of using both a pressurized or gravity
feed water supply without additional modifications. For
proper operation it is important that the valve be fully
open for its intended supply. This will prevent air from
being drawn into the system from the non active
source. Also the pressure supply must still be
connected to the float tank. The connection of a pres-
surized supply directly to the 3-way valve will prevent
detergent from being drawn into the system.
Operation Instructions
Before Starting
WARNING: Check hoses, fittings, wand, trigger gun
and fuel connections daily for signs of wear, cracks
and looseness, replace as required.
AVERTISSEMENT: Vérifier les boyaux, les raccords, le
pistolet à gâchette et les connexions de carburant
pour la présence de traces d'usure, de fissures et de
desserrement; remplacer au besoin.
1. Read all manuals provided with this pressure
washer. Become familiar with location and function
of all operating and safety controls.
2. Connect the water supply hose to the float tank water
inlet (standard garden hose connector). The water
faucet and supply hose must be capable of providing
6.0 GPM.
3. Fill the burner fuel tank. Use kerosene, #1 grade
home heating oil, #1 or #2 diesel fuel. DO NOT
USE GASOLINE.
4. Fill the gasoline tank. Use lead free gasoline
minimum 86 octane. DO NOT use gasoline
containing more than 10% ethanol, 15% MTBE, or
5% methanol.
5. Check pump and engine oil levels.
6. If detergents are to be used, only use detergent for
pressure washers. Follow instructions on detergent
container.
IMPORTANT: Before installing the pressure nozzle
on initial start-up, turn on the water supply and
allow water to run from the end of the wand until
clear to prevent the pressure nozzle from clogging.
IMPORTANT: If the pressure washer has not been
used for an extended period of time, remove the
pressure nozzle from the end of the wand and turn
on the water supply. Allow water to run from the
end of the wand until clear.
7. Install the proper pressure nozzle for your cleaning
needs on end of wand, as shown.
IMPORTANT: The trigger gun provided with this
pressure washer is equipped with a manual trigger
lock to prevent accidental operation of the trigger
gun. The manual trigger lock should be used
whenever the trigger gun is not in use.
To Start
DANGER: DO NOT point wand or spray gun at
yourself or at any person. Bodily injury may result
from water under high pressure.
DANGER: NE PAS pointer la lance ou le pistolet
pulvérisateur dans votre direction ou la direction
d'une autre personne. L'eau sous haute pression peut
causer des lésions corporelles.
IMPORTANT: The water must be turned on before
starting. Running the pump dry will cause damage
and void warranty.
IMPORTANT: DO NOT allow the machine to run with
trigger gun closed for more than 3 minutes at any
time or damage to pump may occur.
1. Turn water ON.
2. Hold wand firmly with trigger gun in the closed
position.
3. Turn fuel shut-off valve counterclockwise (CCW) to
open. Move choke lever to full choke position.
Choke may not be needed on warm engine.
4. Move throttle control to half throttle.
5. Turn key on engine clockwise (CW) hold until
engine starts. DO NOT crank engine for longer
than 15 seconds at any one time or starter damage
may occur. If the engine does not start, it may have
air in the gas lines and be unable to pull gasoline
from the fuel tank. This symptom may appear if the
Manual Trigger Lock
Pressure
Nozzle
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15
Operations
engine has not been run recently or had been run
until all gasoline was depleted from gas lines.
6. When the engine starts, move choke lever until
engine runs smoothly. Then move throttle control
to full throttle. When engine warms, move choke to
no choke position.
IMPORTANT: To allow for proper battery charging
and AC generator operation the throttle control
MUST be kept in full throttle position as soon as
choke lever is placed in no choke position.
7. Holding wand firmly, squeeze the trigger gun open.
Allow air to purge from system.
8. If hot water is desired, adjust the thermostat to
proper temperature. Close the trigger gun and turn
burner switch ON.
IMPORTANT: The throttle control must be in the full
throttle position or damage to the AC generator or
burner may result.
9. Open the trigger gun. The burner will fire immedi-
ately with a puff of smoke. If smoke continues,
refer to the Troubleshooting Guide in this manual.
When the trigger gun is closed or the temperature
setting is reached, the burner will automatically
turn off.
Detergents & General Washing Techniques
WARNING: Some detergents may
be harmful if inhaled or ingested,
causing severe nausea, fainting
or poisoning. The harmful
elements may cause property
damage or severe injury.
AVERTISSEMENT: Certains
détergents peuvent être
dangereux s'ils sont inhalés ou
ingérés, provoquant de fortes
nausées, des évanouissements et
l'empoisonnement. Les éléments dangereux
peuvent causer des dommages à la propriété ou
des blessures graves.
STEP 1: Use detergent designed
specifically for pressure washers.
Household detergents could
damage the pump. Prepare
detergent solution as required by the
manufacturer. Fill a container with
pressure washer detergent. Place
the filter end of detergent suction
tube into the detergent container.
STEP 2: With the engine running, pull trigger to operate
machine. Liquid detergent is drawn into the machine
and mixed with water. Apply detergent to work area. Do
not allow detergent to dry on surface.
IMPORTANT: You must flush the detergent after
each use by placing the suction tube into a bucket
of clean water, open detergent valves then run the
pressure washer for 1-2 minutes.
Thermal Pump Protection
If you run your pressure washer for 3-5 minutes without
pressing the trigger on the spray gun, circulating water
in the pump can reach high temperatures. When the
water reaches this temperature, the pump protector
engages and cools the pump by discharging the warm
water onto the ground. This thermal device prevents
internal damage to the pump.
Cleaning Tips
Pre-rinse cleaning surface with fresh water. Place
detergent suction tube directly into cleaning solution
and apply to surface at low pressure (for best results,
limit your work area to sections approximately 6 feet
square and always apply detergent from bottom to top).
Allow detergent to remain on surface 1-3 minutes. Do
not allow detergent to dry on surface. If surface
appears to be drying, simply wet down surface with
fresh water. If needed, use brush to remove stubborn
dirt. Rinse at high pressure from top to bottom in an
even sweeping motion keeping the spray nozzle
approximately 1 foot from cleaning surface. Use over-
lapping strokes as you clean and rinse any surface. For
best surface cleaning action spray at a slight angle.
Recommendations:
• Before cleaning any surface, an inconspicuous
area should be cleaned to test spray pattern
and distance for maximum cleaning results.
• If painted surfaces are peeling or chipping, use
extreme caution as pressure washer may
remove the loose paint from the surface.
• Keep the spray nozzle a safe distance from the
surface you plan to clean. High pressure wash
a small area, then check the surface for
damage. If no damage is found, continue to
pressure washing.
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD
WARNING

16
Operations
CAUTION - Never use:
• Bleach, chlorine products and other
corrosive chemicals
• Liquids containing solvents (i.e., paint thinner,
gasoline, oils)
• Tri-sodium phosphate products
• Ammonia products
• Acid-based products
ATTENTION: Ne jamais utiliser :
• Insecticides, pesticides ou herbicides
• Eau de Javel, produits à base de chlore et
autres produits chimiques corrosifs
• Liquides contenant des solvants (c.-à-d. diluant
à peinture, essence, huiles, etc.)
• Produits à base de tripolyphosphate de sodium
• Ammoniac ou produits à base d'acide
These chemicals will harm the machine and will
damage the surface being cleaned.
Rinsing
It will take a few seconds for the detergent to clear.
Apply safety latch to spray gun and close detergent
valve. Select and install the desired high pressure
nozzle.
Shutdown Instructions & Storage
1. If detergents were used, draw clear water through
the system to purge detergent.
2. If burner was used, turn OFF burner switch, and
allow pump to run cold water through coil.
3. Move throttle control to idle position.
4. Turn key on engine counterclockwise (CCW) to
OFF position.
5. Turn OFF fuel shut-off valve.
6. Turn OFF water supply.
7. Squeeze trigger gun open to relieve system
pressure.
Storage
DANGER: Do not store flammable liquids (gasoline,
solvents, etc.) near pressure washer, or in non-
ventilated areas.
DANGER: Ne pas entreposer de liquides
inflammables (essence, mazout, pétrole, solvants,
etc.) à proximité de la laveuse à pression ou dans des
endroits non ventilés.
Protect from freezing by storing in a heated area, or by
flushing the system with antifreeze. To flush the
system, fill the float tank with antifreeze and remove
spray nozzle from wand. Start the machine and allow it
to run until antifreeze flows from the end of the wand.
Place end of wand into float tank and circulate the anti-
freeze through system for several minutes. Open and
close the trigger gun several times to circulate anti-
freeze through the unloader valve. Place detergent line
into the float tank. Open the detergent metering valve to
draw antifreeze into the detergent system.
If the pressure washer is not to be used for a consider-
able length of time, it is recommended to flush the
system with antifreeze for rust protection.
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17
Maintenance
WARNING: Unauthorized machine modification or
use of non-approved replacement parts may cause
personal injury and/or property damage and will
void the manufacturer warranty.
AVERTISSEMENT: Une modification non autorisée de
la machine ou l'utilisation de pièces de rechange non
approuvées peut causer des lésions corporelles et/ou
des dommages à la propriété, et annulera la garantie
du fabricant.
Pump
Use HOTSY Pump Oil (8.923-422.0) or equivalent
10W-40 Non-Foaming oil for pump crankcase.
Crankcase must be filled to the full mark on the dipstick
or to center of sight glass window found on the rear of
the pump. During the break-in period, make sure the oil
is changed after the first 50 hours of operation. After
that, replace oil every year or 500 hours, whichever
comes first.
DO NOT:
1. Pump acids.
2. Fail to winterize in freezing temperatures.
3. Allow pump to run dry.
4. Allow machine to run with trigger gun closed for
more than 3 minutes at any one time or damage to
pump may occur.
DO:
1. Use a water softener on the water system if known
to be high in mineral content.
2. Use only high quality detergents and follow manu-
facturer's mix recommendations.
3. Immediately after using detergent solutions the
system should be flushed thoroughly with clear
water.
4. Clean strainer screen on detergent line periodi-
cally.
Unloader Valve
WARNING: The unloader valve on this pressure
washer has been factory set and sealed and is a
field nonadjustable part. Tampering with the
factory setting may cause personal injury and/or
property damage, and will void the manufacturer
warranty.
AVERTISSEMENT: La soupape de décompression sur
cette laveuse à pression a été réglée en usine, puis
scellée, et est une pièce non réglable. L'altération du
paramètre de l'usine pourrait causer des lésions
corporelles et/ou des dommages à la propriété, et
annulera la garantie du fabricant.
Burner Fuel Filter
Drain water that has accumulated in fuel filter and clean
filter element as needed.
Heating Coil
Coil De scaling: In hard water areas, scale buildup
within the heating coil will occur. Scale deposits will
decrease the water temperature rise and may eventu-
ally clog the heating coil. Contact your local service
center when de scaling is needed.
Coil De sooting: Poor grades of fuel oil or inadequate
combustion air will cause heavy soot buildup on the
outside surface of the heating coil. This will restrict the
airflow through the coil, further aggravating the soot
buildup. Contact your local service center when de
sooting is needed.
Engine
Refer to engine manual provided with this pressure
washer for recommended maintenance.
Oil Burner Blower Motor
The motor bearings are permanently lubricated and will
not require any additional lubrication.
Battery
Refer to battery manufacturer’s literature for recom-
mended maintenance
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18
Maintenance
Troubleshooting
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
ENGINE WILL NOT RUN
No fuel Replenish supply.
Low battery Charge battery.
Poor battery cable connection Clean battery terminals and check cables.
Refer to provided engine manual for additional troubleshooting
NO WATER FROM
PRESSURE NOZZLE
Pressure nozzle clogged Clean pressure nozzle.
Inlet water screen clogged Clean.
Pump sucking air Fill the detergent container. Check for loose
hose clamps or fittings.
POOR OR NO
DETERGENTFLOW
Low detergent level Replenish supply.
Detergent screen clogged Clean.
Detergent metering valve not
opening
Check that handle or knob is not slipping on
shaft.
Pressure nozzle clogged Clean.
LOW PRESSURE FROM
SPRAY NOZZLE
Inlet clogged Clean.
Spray nozzle worn or incorrect
size Replace.
Inadequate water supply Increase water supply.
Pump sucking air Fill the detergent container. Check for loose
hose clamps or fittings.
UNLOADER VALVE CYCLES
WHEN TRIGGER GUN IS
OPEN OR CLOSED
Air in system Open and close trigger gun several times.
Defective unloader valve Repair or replace.
Water leak between unloader
valve and trigger gun
Check fittings, hose and trigger gun for leaks.
Repair or replace.
BURNER WILL NOT
IGNITE WHEN TRIGGER
GUN IS OPEN
No fuel Replenish supply.
Adjustable thermostat set too low Raise temperature setting.
Defective pressure switch Repair or replace.
Electrodes are dirty or out of
adjustment
Refer to Oil Burner Manual provided with
machine.
No AC generator output Check AC generator.
BURNER SMOKES OR HAS
OBNOXIOUS ODOR
Air bands need to be adjusted Readjust. Refer to Oil Burner Section under
Installation.
Improper fuel
Use kerosene, #1 Grade Home Heating Oil, #1
or #2 Diesel Fuel.
DO NOT USE GASOLINE.
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD

19
Maintenance
When ordering from your dealer, please provide the following:
Model Number: _______________________________________
Machine Serial Number: ________________________________
Component Part Number: _______________________________
Description: __________________________________________
PROBLEM POSSIBLE CAUSE SOLUTION
UNIT SMOKES
WHILE BURNER
IS RUNNING OR
SMOKES AT
COLD-START
WHEN BURNER IS
OFF
Improper fuel or water in fuel Drain tank and replace contaminated fuel.
Improper air adjustment Readjust air bands on burner assembly.
Low fuel pressure if below 140 psi Adjust higher.
Air leaks in fuel lines Check fuel lines for leaks or air bubbles.
Tighten or replace as needed.
Plugged or dirty burner nozzle Replace.
Faulty burner nozzle spray pattern Replace nozzle.
Heavy accumulation of soot on coils
and burner assembly
Remove coils and burner assembly. Clean
thoroughly.
Misaligned electrode Realign electrodes.
Obstruction in smoke stack while
burner is running Check for insulation blockage or other foreign objects.
High fuel pressure if above 140 psi,
when unit is cold started and burner
is off
Reduce fuel pressure, but not below 140 psi
IMPORTANT
If the pressure washer demonstrates other symptoms or the
corrective actions listed do not correct the problem, contact the
local authorized Hotsy Service Center. The Hotsy Service
Center can be identified by visiting www.hotsy.com.
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD

20
Notes
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD