Hotsy 9450 User manual

OPERATOR’S MANUAL
For technical assistance or the dealer nearest you,
consult our web page at www.hotsy.com or call 1-800-525-1976
OIL FIRED BURNER MODULES
9450
9460
#89143640 / 97-6263

9450 SPECIFICATIONS
Maximum Inlet Pressure: 3200 PSI
Burner Type: Oil Fired 700,00 BTU/Hr.
Burner Fuel Pressure: 130 PSI
Machine Voltage: 120V
Total Machine Amperage: 8
Machine Weight: 9450, 495 lbs.
Shipping Weight: 9450, 525 lbs.
Exhaust Stack Size: 10"
Machine Dimensions: Length = 32.5", Width = 25", Height = 50.5"
9460 SPECIFICATIONS
Maximum Inlet Pressure: 3200 PSI
Burner Type: Oil Fired 920,000 BTU/Hr.
Burner Fuel Pressure: 130 PSI
Machine Voltage: 120V
Total Machine Amperage: 8
Machine Weight: 9460, 865 lbs.
Shipping Weight: 9460, 920 lbs.
Exhaust Stack Size: 12"
Machine Dimensions: Length = 40.5", Width = 32", Height = 65"

3
CONTENTS
Model Number ______________________________
Serial Number ______________________________
Date of Purchase ____________________________
The model and serial numbers will be found on a decal attached
to the machine.You should record both serial number and date of
purchase and keep in a safe place for future reference.
8.914-364.0/97-6263 • Hotsy 9450/9460OF • Rev. 3/09
Introduction & General Safety Information 4-5
Component Identification 6
Installation 7
Operating Instructions 8
Detergents & General Cleaning Techniques 9
Shutting Down & Clean-Up 10
Troubleshooting 11-12
Preventative Maintenance 13-15
Exploded View & Parts List - 9450 16-19
Exploded View & Parts List - 9460 20-23
Exploded Burner Assembly & Parts List 24
Control Panel Exploded View & Parts List 25
Electrical Wiring Diagrams 26
Warranty 27

8.914-364.0/97-6263 • Hotsy 9450/9460OF • Rev. 3/09
OPERATOR’S MANUAL PRESSURE WASHER
4
INTRODUCTION & SAFETY INFORMATION
Thank you for purchasing a Hotsy heating module.
This manual covers the operation and maintenance of
the 9450 and the 9460 oil fired heater modules. All in-
formation in this manual is based on the latest product
information available at the time of printing.
Hotsy, Inc. reserves 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 Hotsy heating module.Warning infor-
mation should be emphasized and understood. If the
operator is not fluent in English, the manufacturer’s in-
structions 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 manufacturers’ instructions.
This manual should be considered a perma-
nent part of the machine and should remain
with it if machine is resold.
When ordering parts, please specify model
and serial number.
MACHINE SAFETY
CAUTION:To reduce the risk of
injury, read operating instruc-
tions carefully before using.
1. Read the owner's manual
thoroughly. Failure to follow
instructions could cause mal-
function of the machine and
result in death, serious bodily
injury and/or property damage.
Read owner’s manual of at-
tached pressure washer before
operating.
2. All installations must comply with local codes.
Contact your electrician, plumber, utility company
or the selling distributor for specific details.
WARNING: Flammable liquids
can create fumes which can
ignite causing property dam-
age or severe injury.
WARNING: Do not use gaso-
line, crankcase drainings or oil
containing gasoline, solvents
or alcohol. Doing so will result
in fire and/or explosion.
WARNING: Do not spray flammable liquids. Op-
erate only where an open torch is permitted.
3. This oil burning machine shall be installed only in
locations where combustible dusts and flammable
gases or vapors are not present.
4. In these oil burning models, use only kerosene,
No. 1 home heating fuel, or diesel.
5. Risk of explosion - do not spray flammable liquids.
Operate only where open flame or torch is per-
mitted.
WARNING: Keep water spray,
wand and high pressure hose
away from electric wiring or
fatal electric shock may result.
Read warning tag on electrical
cord.
6. To protect the operator from
electrical shock, the machine
must be electrically grounded.
It is the responsibility of the owner to connect this
machine to a UL grounded receptacle of proper
voltage and amperage ratings. Do not spray water
on or near electrical components. Do not touch
machine with wet hands or while standing in water.
Always disconnect power before servicing.
7. Grip cleaning wand of the attached pressure
washer securely with both hands before starting
the cleaner. Failure to do this could result in injury
from a whipping wand.
WARNING: Spray gun kicks back — hold with both
hands.
WARNING: High pressure
stream of fluid from the pres-
sure washer attached to this
equipment can produce can
pierce the skin and its un-
derlying tissues, leading to
serious injury and possible
amputation.
8. High pressure developed
by the attached pressure washer can cause bodily
injury or damage. Use caution when operating. Do
not point the spray gun at anyone or at any part
of the body. This machine is to be used only by
qualified operators.
9. Never make adjustments on machine while it is in
operation.
WARNING: High pressure spray
can cause paint chips or other
particles to become airborne
and fly at high speeds.
10. Eye, hand and foot safety de-
vices must be worn when using
this equipment.
WARNING
READ OPERATOR’S
MANUAL
THOROUGHLY
PRIOR TO USE.
WARNING
HIGH PRESSURE
SPRAY CAN PIERCE
SKIN AND TISSUES.
WARNING
KEEP WATER SPRAY
AWAY FROM ELEC-
TRICAL WIRING.
WARNING
RISK OF FIRE.
DO NOT USE WITH
FLAMMABLE LIQUIDS.
WARNING
PROTECTIVE EYEWEAR
AND CLOTHING MUST
BE WORN.

8.914-364.0/97-6263 • Hotsy 9450/9460OF • Rev. 3/09
5
PRESSURE WASHER OPERATOR’S MANUAL
INTRODUCTION & SAFETY INFORMATION
WARNING
RISK OF ASPHYXIATION.
USE ONLY IN A WELL
VENTILATED AREA.
WARNING
RISK OF FIRE.
DO NOT ADD FUEL
WHEN OPERATING
MACHINE.
WARNING: Risk of asphyxi-
ation. Use this product only in
a well ventilated area.
11. When the machine is work-
ing, do not cover or place in
a closed space where venti-
lation is insufficient.
WARNING: Risk of fire. Do not
add fuel when the machine is
operating or still hot.
12. Attached pressure washer
with a spray gun should not
be operated with the spray
gun in the off position for ex-
tended periods of time as this
may cause damage to the
pump. Check to make sure
burner shuts off when spray gun trigger is
closed.
13. Protect from freezing.
14. To prevent a serious injury, make certain quick
coupler on discharge hose has locked before using
pressure washer.
15. Do not allow acids, caustic or abrasive fluids to
pass through the pump.
16. Inlet water must be from a cold, fresh, city water
supply.
17. Do not allow CHILDREN to operate the pressure
washer at any time. THIS MACHINE MUST BE
ATTENDED DURING OPERATION.
18. The best insurance against an accident is pre-
caution, and knowledge of the machine.
19. Do not operate this product when fatigued or under
the influence of alcohol or drugs. Keep operating
area clear of all persons.
20. Hotsy will not be liable for any changes made to
our standard machines, or any components not
purchased from Hotsy.
21. Do not overreach or stand on unstable support.
Keep good footing and balance at all times.
22. Follow the maintenance instructions specified in
the manual.
23. When making repairs disconnect from electrical
source.
24. Turn burner off and open spray gun to allow water
to flow and cool coil to 100° before turning machine
off.
25. Before disconnecting high pressure hose from
9450 or 9460 water outlet, open spray gun to
relieve back pressure in hose.
Caution: This machine produces hot water and
must have insulated components attached to
protect the operator.

8.914-364.0/97-6263 • Hotsy 9450/9460OF • Rev. 3/09
OPERATOR’S MANUAL PRESSURE WASHER
6
COMPONENT IDENTIFICATION
Burner
Exhaust Vent
For
Detail See
Control
Box Illus.
Relief Valve
High Pressure
Outlet
Burner Switch
Fuel Supply
Inlet
Fresh
Water
Inlet
Flow Switch
Power Cord

8.914-364.0/97-6263 • Hotsy 9450/9460OF • Rev. 3/09
7
PRESSURE WASHER OPERATOR’S MANUAL
INSTALLATION
Place machine in a convenient location providing
ample support, draining and room for maintenance.
Location:
The location should protect the machine from dam-
aging environmental conditions such as wind, rain,
and freezing temperatures.
These machines are designed for indoor
use. They must be stored indoors when
not in use.
1. The machine should be run on a level surface
where it is not readily influenced by outside
sources such as strong winds, freezing tempera-
tures, rain, etc. The unit should be located to al-
low accessibility for refilling of fuel, adjustments
and maintenance. Normal precautions should be
taken by the operator of the unit to prevent excess
moisture from reaching the power unit or electrical
controls.
2. It is recommended that a partition be made be-
tween the wash area and the machine to prevent
direct water spray from coming in contact with the
machine. Excess moisture reaching any electric
components or electrical controls will reduce ma-
chine life and may cause electrical shorts.
3. During installation of the machine, beware of
poorly ventilated locations or areas where exhaust
fans may cause an insufficient supply of oxygen.
Sufficient combustion can only be obtained when
there is a sufficient supply of oxygen available for
the amount of fuel being burned.
Electrical:
This machine, when installed, must be electrically
grounded in accordance to local codes. Check for
proper power supply using a volt meter.
Placement:
Do not locate near any combustible material. Keep all
flammable material at least 20 feet away.
Allow enough space for servicing the machine.
Local code will require certain distances from floor and
walls. (Two feet away should be adequate.)
Water Source:
The water source for the machine 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 inad-
equate, or if the garden hose is kinked, the attached
pressure washer will run very rough and the burner
will not fire.
Connection:
Connect the wand, nozzle, hose and spray gun (where
applicable). On pipe thread connections, use teflon
tape to avoid water leaks. (See Component Identifi-
cation.)
Venting:
Adding exhaust vent pipe to your oil fired burner is
not recommended. It restricts air flow, causing carbon
build-up, which affects the operation, and increases
maintenance on the coil. If a stack must be used,
refrain from using 90° bends. If the pipe can not go
straight up then use only 45° bends and go to the next
size pipe. The overall pipe length must not exceed 6
feet in length.

8.914-364.0/97-6263 • Hotsy 9450/9460OF • Rev. 3/09
OPERATOR’S MANUAL PRESSURE WASHER
8
OPERATION INSTRUCTIONS
STEP 1: Review installation instruc-
tions prior to connecting water sup-
ply and checking fuel tank and pump
oil level on both machines.
STEP 2: Connect high pressure
hose from pressure washer (not
included) to burner module.
STEP 3: Connect high pressure
hose from pressure washer when
connecting to burner module out-
let.
STEP 4: Attach high pressure wand
to spray gun of connected pressure
washer (Not Included).
STEP 5: Connect the power cords
into proper electrical outlet (See
Serial Port).
STEP 6: Turn on burner switch. Pilot
ignition will begin to spark. Confirm
pilot light ignition, if unsuccessful,
turn off switch and turn on again. If
pilot continues to spark, but not light,
consult troubleshooting guide.

8.914-364.0/97-6263 • Hotsy 9450/9460OF • Rev. 3/09
9
PRESSURE WASHER OPERATOR’S MANUAL
Refer to operation manual of machine that is to be con-
nected to the oil fired heating module for instructions
on applying detergent. Follow instructions when using
detergent injectors from the supplier of the injector.
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 overlapping 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 wash-
ing.
CAUTION - Never use:
• Bleach, chlorine products and other corrosive
chemicals
• Liquids containing solvents (i.e., paint thinner,
gasoline, oils, etc.)
• Tri-sodium phosphate products
• Ammonia or Acid-based products
These chemicals will harm the machine and will dam-
age the surface being cleaned.
RINSING
It will take a few seconds for the detergent to clear.
Apply safety latch to spray gun. Select and install de-
sired high pressure nozzle. NOTE: You can also stop
detergent from flowing by removing detergent siphon
tube from bottle.
DETERGENTS & GENERAL CLEANING TECHNIQUES

8.914-364.0/97-6263 • Hotsy 9450/9460OF • Rev. 3/09
OPERATOR’S MANUAL PRESSURE WASHER
10
SHUTTING DOWN & CLEAN-UP
STEP 1: To clean detergent from
hose and wand, insert end of
detergent hose in clean bucket of
water and run for a few minutes
until steady stream of clean water
is evident.
STEP 4: Open spray gun to relieve
remaining pressure.
STEP 2: Turn Burner Switch “Off”
and continue spraying water until
temperature reaches 100°.
STEP 3: Turn water off.

8.914-364.0/97-6263 • Hotsy 9450/9460OF • Rev. 3/09
11
PRESSURE WASHER Troubleshooting Guide
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
BURNER WILL NOT
LIGHT
Disconnected or short in electrical
wiring
All wire contacts should be clean and tight. No
breaks in wire.
Burner motor thermal protector
tripped
If tripped, check voltage, connections and
extensions for cause. Check fuel pump shaft
rotation for binding, causing motor to
overheat.
Flex-coupling slipping on fuel pump
shaft or burner motor shaft
Replace if needed.
On-off switch defective Check continuity through burner switch.
Heavy sooting on coil and burner,
can cause interruption of air flow
and shorting of electrodes
Clean as required.
Improper electrode setting Clean and test according to diagram in
operator's manual.
Fuel not reaching combustion
chamber
Check fuel pump for proper flow. Check
solenoid flow switch on units with spray gun
control for proper on-off flow switch.
Fuel solenoid malfunction Check by placing screwdriver inside coil then
turn machine on, open spray gun and check
for magnetic pull.
Clogged burner nozzle Replace.
Water not turned on Turn on water to activate burner flow switch.
Flow switch malfunction Remove, test for continuity and replace as
needed.
MACHINE SMOKES Improper fuel or water in fuel Drain tank and replace contaminated fuel.
Improper air adjustment Readjust air bands on burner assembly.
Low fuel pressure Adjust fuel pump pressure to specifications.
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 to specifications.
Fuel filter partially clogged Replace as needed.
Obstruction in smoke stack Check for insulation blockage or other foreign
objects.
Soot build up on coils Clean coils with soot remover.
Lime build up in coils Clean inside of coils using coil cleaner.
Improper burner nozzle See exploded view parts list.

8.914-364.0/97-6263 • Hotsy 9450/9460OF • REV.9/08
PRESSURE WASHER Troubleshooting Guide
12
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
LOW WATER
TEMPERATURE
Improper fuel or water in fuel Drain fuel tank and replace with proper fuel.
Low fuel pressure Increase fuel pressure.
Weak fuel pump Check fuel pump temperature. Replace
pump if needed.
Fuel filter partially clogged Replace as needed.
Soot build up on coils Clean coils with soot remover.
Lime build up on coils Clean inside of coils using coil cleaner.
Improper burner nozzle See exploded view parts list.
WATER
TEMPERATURE
TOO HOT
Incoming water to machine warm or
hot
Lower incoming water temperature.
Fuel pump pressure too high Lower fuel pressure.
Fuel pump defective Replace fuel pump.
Chemical line sucking air Tighten all clamps. Check chemical line for
holes.
Defective high limit switch Replace.
Incorrect fuel nozzle size See exploded view parts list.
Insufficient water supplied Check GPM to machine.
Restricted water flow Check nozzle for obstruction, proper size.

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13
PRESSURE WASHER OPERATOR’S MANUAL
PREVENTATIVE MAINTENANCE
1. Use clean fuel - kerosene, No. 1 home heating
fuel or diesel. Clean or replace fuel filter every
100 hours of operation. Avoid water contaminated
fuel as it will seize up the fuel pump. De-soot coils
monthly. Use an additive if diesel is being used.
2. Check to see that the attached pressure washer
water pump is properly lubricated.
3. Follow Winterizing Procedures to prevent freeze
damage to pump and coils.
4. Always neutralize and flush chemical from system
after use.
5. If water is known to be high in mineral content, use
a water softener on your water system, or de-scale
as needed.
6. Do not allow acidic, caustic or abrasive fluids to
be pumped through system.
7. Always use high grade quality Hotsy cleaning
products.
8. Never run attached pressure washer pump dry for
extended periods of time.
9. If machine is operated with smoky or eye burning
exhaust, coils will soot up, not letting water reach
maximum operating temperature. (See section on
Air Adjustments).
10. Never allow water to be sprayed on or near the
motor or burner assembly or any electrical com-
ponent.
11. Delime coils per instructions.
It is advisable, periodically, to visually inspect the
burner. Check air inlet to make sure it is not clogged
or blocked.Wipe off any oil spills and keep this equip-
ment clean and dry.
The areas around the Landa washer should be kept
clean and free of combustible materials, gasoline and
other flammable vapors and liquids.
The flow of combustion and ventilating air to the burner
must not be blocked or obstructed in any manner.
MAINTENANCE AND SERVICE
Winterizing Procedure:
Damage due to freezing is not covered by warranty.
Adhere to the following cold weather procedures when-
ever the washer must be stored or operated outdoors
under freezing conditions.
During winter months, when temperatures drop be-
low 32°F, protecting your machine against freezing is
necessary. Store the machine in a heated room. If this
is not possible, use compressed air to blow all water
out of the system.
High Limit Thermostat:
For safety, each machine is equipped with a high limit
control switch. In the event the temperature of the water
should exceed its operating temperature the high limit
control will turn the burner off until the water cools.
Cleaning of Coils:
In alkaline water areas, lime deposits can accumulate
rapidly inside the coil pipes. This growth is increased
by the extreme heat build up in the coil. The best
prevention for liming conditions is to use high quality
cleaning chemicals. In areas where alkaline water is
an extreme problem, periodic use of Deliming Pow-
der will remove lime and other deposits before coil
becomes plugged.
Deliming Coils:
Periodic flushing of coils or optional float tank is rec-
ommended.
Step 1 Fill a container or float tank with 4 gallons
of water, then add 1 lb. of deliming powder. Mix
thoroughly. Verify mixing ratio on deliming powder
package.
Step 2 Remove nozzle from wand assembly and
put spray gun and wand assembly into float tank.
Attach a nylon stocking to the end of the wand to
collect debris.
Step 3 Attach a short section (3-5 ft.) of garden hose
to the attached pressure washer to siphon solution
from an elevated container.Turn attached pressure
washer switch on, allowing solution to be pumped
through coils back into the container. Solution
should be allowed to circulate 2-4 hours.
Step 4 After circulating solution flush entire system
with fresh water. Reinstall high pressure nozzle
into wand.
Removal of Soot and Heating Coil:
In the heating process, fuel residue in the form of soot
deposits may develop between the heating coil pipe
and block air flow which will affect burner combustion.
When soot has been detected on visual observation,
the soot on the coil must be washed off after following
the coil removal steps.
Relief Valve
WARNING:The relief valve on this pressure washer
has been factory set and sealed and is a field non-
adjustable part.Tampering with the factory setting
may cause personal injury and/or property dam-
age and will void the manufacturer warranty. For
replacement parts refer to exploded views.

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OPERATOR’S MANUAL PRESSURE WASHER
14
Fuel:
Use clean fuel oil that is not contaminated with water
and debris. Replace fuel filter and drain tank every
100 hours of operation. Use No. 1 or No. 2 Heating
Oil (ASTM D306) only. NEVER use gasoline in your
burner 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.
Ignition Circuit:
Periodically inspect wires,
spring contact and elec-
trodes for condition, se-
curity and proper spacing.
Transformer test: (CAU-
TION 10,000 VOLTS)
use defect free insulated
screwdriver and keep fin-
gers off blade! Lay blade
across one contact: OK if
arc will span 1/2" between
end of blade and other
contact.
Electrode Setting:
(See illustration below)
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.
Fuel Control System:
The 9450 and 9460 both utilize a fuel solenoid valve
located on the fuel pump to control the flow of fuel
to the combustion chamber. This solenoid, which is
normally closed, is activated by a flow switch when
water is flowing through it.When an operator releases
the trigger on the spray gun, the flow of water through
the flow switch stops, turning off the current to the fuel
solenoid. The solenoid then closes, shutting off the
PREVENTATIVE MAINTENANCE
supply of fuel to the combustion chamber. Controlling
the flow of fuel in this way gives an instantaneous burn
or no burn situation, thereby eliminating high and low
water temperatures, and combustion smoke normally
associated with machines incorporating a spray gun.
Periodic inspection is recommended to insure that
the fuel solenoid valve functions properly. This can
be done by operating the machine and checking to
see that when the trigger on the spray gun is in the off
position, the burner is not firing.
AIR ADJUSTMENT
Fuel Pressure Adjustment:
To adjust fuel pressure, turn the adjusting screw
(located at the regulator pressure port) clockwise to
increase, counterclockwise to decrease. Do not exceed
250 psi. NOTE: When changing fuel pump, a by-pass
plug must be installed in return line port or fuel pump
will not prime.
Burner Air Adjustment: The oil burner is preset for
operation at altitudes below 3000 feet. If operated at
higher altitudes, it may be necessary to adjust the air
band setting. Adjust the air band for a #1 or #2 smoke
spot on the Bacharach scale.
To adjust, start machine and turn burner ON (refer to
Operation for details). Loosen two locking screws found
in the air shutter openings (refer to figure below) and
close air shutter until black smoke appears from burner
exhaust vent. Note air band position. Next, slowly open
the air shutter until white smoke just starts to appear.
Turn air shutter halfway back to the black smoke position
previously noted. Tighten locking screws.
If the desired position cannot be obtained using only the
air shutter, lock the air shutter in as close a position as
can be obtained, then repeat the above procedure on
the air band setting.
Electrodes Check : Periodically check wiring connections.
If necessary to adjust electrodes, use diagram.
5/32”
1/16”
7/16”
Electrode
Nozzle
10
8
6
4
2
Air Shutter
Locking Screw Air Shutter Air Band
Air Band
Locking Screw
Air Shutter
Locking Screw

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PRESSURE WASHER OPERATOR’S MANUAL
PREVENTATIVE MAINTENANCE
CAUTION: If white smoke appears from burner
exhaust vent during start-up or operation, discon-
tinue use and readjust air bands.
NOTE: If a flue is installed, have a professional ser-
viceman adjust your burner for a #1 or #2 smoke spot
on the Bacharach scale.
This pressure washer was produced with the best available materials and quality craftsmanship. However, you
as the owner have certain responsibilities for the correct care of the equipment. Attention to regular preventative
maintenance procedures will assist in preserving the performance of your equipment. Contact your Hotsy, Inc.
dealer for maintenance. Regular preventative maintenance will add many hours to the life of your pressure
washer. Perform maintenance more often under severe conditions.
OIL CHANGE RECORD
MAINTENANCE SCHEDULE
Remove Burner Soot From Heating Coil Annually
Descale Coil Annually - (more often if required)
Replace Quick Connects Annually
Clean Water and Detergent Screen/Filter Weekly
Clean Float/Supply Tank Every 6 months
Replace HP Hose If there is any sign of wear
Grease Motor Every 10,000 hours
Check Burner Pilot Jets Annually
Pressure Relief Valve Annually
Date Oil Changed
Month/Day/Year
Estimated Operating
Hours Since Last Oil
Change
MAINTENANCE SCHEDULE
For additional burner component information, see
burner exploded view. It is recommended that the oil
burner be serviced yearly or as needed. Contact your
local service center.

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OPERATOR’S MANUAL PRESSURE WASHER
16
EXPLODED VIEW - 9450
5
6
17
5
8
9
7
23
26
24
17
22
43
10
21
2
3
30
32
29
28
46
44
34
36
34
35
33
40
39
49
31
47,48
37
5
57
58
52
30
63 64
27
45
26

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PRESSURE WASHER OPERATOR’S MANUAL
EXPLODED VIEW - 9450
GROUND
50
15
16
14
10
11
13
12
12
18,54
See
Control
Box Illus.
For Detail
4
20
Water
Inlet
19
121
41
42
59
60
62
61
38
55
56
42
53
51
59

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OPERATOR’S MANUAL PRESSURE WASHER
18
EXPLODED VIEW PARTS LIST - 9450
ITEM PART NO. DESCRIPTION QTY
1 236393 8.911-482.0 Chassis Paint 1
2 240860 8.911-494.0 Coil, Oil 22", Weldment 1
3 7-014874 8.717-452.0 Insulation, Cerafelt 6 ft.
4 950519 8.716-112.0 Switch, Toggle, 10A/250V 1
5 935250 8.718-942.0 Screw, #12 x 3/4", Tex 8
6 296391 8.911-600.0 Lid, 24" Painted 1
7 254421 8.911-552.0 Door Heater Paint 1
8 926598 9.804-301.0 Rivet, 1/8" x 1/4", POP 2
9 878961 8.719-081.0 Latch, Spring Flush Head 1
10 2-00101 9.802-015.0 Nipple, 1/2" x 4" Galvanized 2
11 754717 8.706-216.0 Tee, 1/2", Female, Steel Pipe 1
12 715755 8.706-243.0 Plug, 1/2", Square Head, Galvanized 2
13 2-0052 9.802-038.0 Nipple, 1/2" JIC, 1/2" Pipe 1
14 4-02067728 8.711-702.0 Hose, 1/2" x 28", 2 Wire, Pressure 1
15 661357 9.802-039.0 Elbow, 1/2" JIC, 3/8", 90° 1
16 6-021730 8.933-006.0 Switch, 6- Flow MV60, Yellow 1
17 815220 8.706-294.0 Bushing, 1/2" x 3/8", Steel 2
18 826000 8.717-010.0 Cordset, 115V/15A 5-15PX60 1
19 11-0333 8.900-898.0 Label, Control Panel 1
20 859805 8.706-548.0 Grommet, 2-1/8" x 2-7/8" x 7/16" 1
21 703107 9.802-778.0 Nut, Whiz Loc 5/16" Flange 10
22 2-0032 8.706-172.0 Elbow, 1/2", 90° Female Pipe 1
23 898035 4-0211000 Hose, 1/2", Push-On 36"
24 2-0039 8.706-226.0 Cross, 1/2" Forged 1
25 9.802-433.0 Valve, Safety Relief, VSP 1
26 95-07104826 8.912-016.0 Bracket, Insulation Retainer 1
27 2-00742 9.802-047.0 Adapter, 1/2" Hex 1
28 799422 9.803-043.0 Nipple, 1/4" x 2" 1
29 851140 8.709-160.0 Filter, Fuel 1
30 799502 8.706-958.0 Elbow, 1/4" Hose Barb 2
31 824095 8.709-090.0 Clamp, Round, .75 ID 1
32 615279 8.706-297.0 Bushing, 3/8" x 1/4" 1
33 296382 8.911-598.0 Lid, 22-1/2" (9450 Oil Fired Only) 1
34 873757 8.717-451.0 Insulation, 24" x 24" x 1/2" 2
35 104928 8.719-940.0 Insulation, Retainer Ring 1
36 304310 8.911-630.0 Burner Mount 1
37 11-0326 8.900-894.0 Decal, Operating Instruction 1
38 10-08021 9.800-016.0 Label, Warning Disconnect 1
39 834154 8.901-135.0 Label, Winterize 1
40 914903 8.901-215.0 Label, Lexan, Hotsy, 5.6" x 3.25" 1
41 227828 8.911-438.0 Bracket, Coil 4
42 646673 9.800-021.0 Label, Hot Water Outlet 2
43 890849 8.706-236.0 Tee, 1/2" Street 1
44 4-0509 8.712-185.0 Switch, Snap 1
45 389522 8.707-286.0 Well, Thermostat 1

8.914-364.0/97-6263 • Hotsy 9450/9460OF • Rev. 3/09
19
PRESSURE WASHER OPERATOR’S MANUAL
ITEM PART NO. DESCRIPTION QTY
46 90-141 9.804-568.0 Screw, 6/32" x 3/8" 1
47 6-05153 9.802-515.0 Strain Relief 1
48 703127 9.802-525.0 Locknut, 1/2" 1
49 6-04112 8.716-342.0 Cover, Blank 1
50 2-0019 8.706-122.0 Nipple, 3/8" x 1/2" Hex 1
51 646666 9.800-020.0 Label, Cold Water Inlet 1
52 7-00002 8.717-024.0 Burner Assembly 1
53 11-3212 8.901-134.0 Label, Fuel 1
54 10-08018 8.932-969.0 Label, Warning Service Cord 1
55 10-08017 8.932-968.0 Label, Outdoor Use 1
56 10-9999 9.800-034.0 Label, Clear Lexan 1
57 10-02025A 9.800-006.0 Label, Caution Hot 2
58 11-3215 8.901-136.0 Label, Hotsy Detergent 1
59
95-0710861644 8.719-946.0 Hanger, Hose 2
60 90-30021 8.718-945.0 Screw, #14 Tek 1
61 6-0507 8.716-460.0 Lug, Grounding 1
62 11-3479 8.901-191.0 Label, Warning Disconnect 1
63 2-1002 8.706-777.0 Nipple, 1/4" Close 1
64 722731 8.706-812.0 Coupling, 1/4" Hex 1
EXPLODED VIEW PARTS LIST - 9450

8.914-364.0/97-6263 • Hotsy 9450/9460OF • Rev. 3/09
OPERATOR’S MANUAL PRESSURE WASHER
20
EXPLODED VIEW - 9460
5
6
25
5
8
9
7
23
24
17
22
38
10
21
2
28
37
30
32
29
36
31
39
35
41
45
51
42,43 44
47
33
5
46
62
52
56,57,58
55
30
69
70
27
40
17