Mi-T-M HG-SERIES User manual

Operator's Manual 1
©Copyright 2006, Mi-T-M Corporation® Form #37-0749-E/F/S-082106
OPERATING INSTRUCTIONS FOR
HG-SERIES
HOT WATER PRESSURE WASHERS
- NATURAL GAS
- L.P. - GAS (VAPOR ONLY)
CAUTION
RISK OF INJURY!
READ MANUAL BEFORE OPERATING!
This manual is an important part of the
pressure washer and must
remain with the unit when you sell it!
®
C US
201473

2 Operator's Manual
TABLE OF CONTENTS
INTRODUCTION ................................................................................................................................................3
IMPORTANT SAFETY WARNINGS................................................................................................................4-9
RISK OF EXPLOSION OR FIRE.....................................................................................................4
RISK OF ASPHYXIATION ...............................................................................................................5
RISK OF ELECTROCUTION OR ELECTRICAL SHOCK ...............................................................6
RISK OF INJECTION OR SEVERE CUTTING INJURY .................................................................7
RISK OF BURNS.............................................................................................................................8
RISK OF BURSTING.......................................................................................................................8
RISK FROM MOVING PARTS ........................................................................................................8
RISK OF BODILY INJURY ..............................................................................................................9
FEATURES..................................................................................................................................................10-11
INSTALLATION ...........................................................................................................................................12-17
LOCATION AND PLACEMENT .....................................................................................................12
ELECTRICAL.................................................................................................................................12
GAS PIPING..................................................................................................................................13
VENTILATION ...............................................................................................................................14
WATER SUPPLY ...........................................................................................................................15
HIGH PRESSURE CONNECTION................................................................................................15
INSPECTING AND VERIFYING CONDITIONS ............................................................................16
PRE-OPERATION CHECKLIST....................................................................................................17
PREPARATION ...........................................................................................................................................18-20
ATTIRE ..........................................................................................................................................18
PRE-START...................................................................................................................................18
UNLOADER...................................................................................................................................18
QUICK-CONNECT NOZZLES.......................................................................................................19
NOZZLE CONNECTION ...............................................................................................................19
DUAL LANCE ASSEMBLY WITH ADJUSTABLE PRESSURE......................................................20
PRE-START SAFETY INSPECTION.............................................................................................20
OPERATING INSTRUCTIONS .......................................................................................................................................22-24
FLUSHING THE SYSTEM ............................................................................................................22
COLD WATER OPERATION .........................................................................................................22
HOT WATER OPERATION............................................................................................................23
CLEANING WITH DETERGENTS ................................................................................................23
SHUTDOWN .................................................................................................................................24
OPTIONS ......................................................................................................................................24
MAINTENANCE ..........................................................................................................................................25-27
PREVENTIVE MAINTENANCE ....................................................................................................25
DELIME COIL................................................................................................................................26
WINTERIZING...............................................................................................................................27
MAINTENANCE CHARTS ...............................................................................................................................28
TROUBLESHOOTING ................................................................................................................................29-30
STATEMENT OF WARRANTY.........................................................................................................................31
NOTES.........................................................................................................................................................32-33
NATIONAL CODES:
ANSI Z223.1 (NFPA NO. 54) NATIONAL FUEL GAS CODE.
NFPA NO. 70 (NEC) NATIONAL ELECTRICAL CODE.
CSA B149.1 GAS INSTALLATION CODE.
CSA C22.1 CANADIAN ELECTRICAL CODE PART 1.

Operator's Manual 3
INTRODUCTION
Congratulations on the purchase of your new HG-SERIES pressure washer! You can be assured your pressure washer
was constructed and designed with quality and performance in mind. Each component has been rigorously tested to
ensure the highest level of acceptance.
This operator's manual was compiled for your benet. By reading and following the simple safety, installation, operation,
maintenance and troubleshooting steps described in this manual, you will receive years of trouble free operation from
your new pressure washer. The contents of this manual are based on the latest product information available at the time
of publication. Manufacturer reserves the right to make changes in price, color, materials, equipment, specications or
models at any time without notice.
! IMPORTANT !
Theseparagraphsaresurroundedbya"SAFETYALERTBOX." Thisboxisusedtodesignateand
emphasize Safety Warnings that must be followed when operating this pressure washer.
Accompanying the Safety Warnings are "signal words" which designate the degree or level
of hazard seriousness. The "signal words" used in this manual are as follows:
DANGER: Indicates an imminently hazardous situation which, if not avoided, WILL
result in death or serious injury.
WARNING: Indicates a potentially hazardous situation which, if not avoided, COULD
result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided MAY
result in minor or moderate injury.
The symbols set to the left of this paragraph are "Safety Alert Symbols." These symbols
are used to call attention to items or procedures that could be dangerous to you or other
persons using this equipment.
ALWAYS PROVIDE A COPY OF THIS MANUAL TO ANYONE USING THIS EQUIPMENT. READ
ALL INSTRUCTIONS BEFORE OPERATING THIS PRESSURE WASHER AND ESPECIALLY
POINT OUT THE "SAFETY WARNINGS" TO PREVENT THE POSSIBILITY OF PERSONAL
INJURY TO THE OPERATOR.
Once the unit has been removed from the box, immediately write in the serial number of your unit in the space provided
below.
SERIAL NUMBER_________________________________
Inspect for signs of obvious or concealed freight damage. If damage does exist, le a claim with the transportation
company immediately. Be sure that all damaged parts are replaced and that the mechanical and electrical problems are
corrected prior to operation of the unit. If you require service, contact Customer Service Representative.
CUSTOMER SERVICE
CALL OUR TOLL-FREE NUMBER
for the Sales or Service Center nearest you!
800-553-9053
Please have the following information available for all service calls:
1. Model Number
2. Serial Number
3. Date and Place of Purchase

4 Operator's Manual
POTENTIAL CONSEQUENCE PREVENTION
SAFETY WARNINGS
WARNING: When using this product, basic precautions should always be observed, including the following:
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER
HAZARD
RISK OF
EXPLOSION OR FIRE
Serious injury or death may
occur from normal sparks in the
multiple ignition sources.
If you smell gas, extinguish any open ame
and test all joints with a soap solution. If the
odor persists, turn off gas supply and call for
service.
L.P.-Gas is heavier than air and will gravitate
to the oor. Always provide adequate oor
space and ventilation with L.P.-Gas systems
and sniff oor area for gas before operating.
Do not operate unit if smell exists.
Never leave operating machine unattended.
When servicing this machine, be especially
careful to properly shut off gas supply.
Install the pressure washer where open ame
or torch is permitted.
Always operate pressure washer in a well
ventilated area free of ammable vapors,
combustible materials including dust or
gases.
Do not allow lint or dust to collect in burner
area.
Do not use this pressure washer to spray
ammable liquids! Flammable liquids can
create fumes which can ignite.
This pressure washer has multiple safety
devices which should never be altered,
modied, removed or made inoperative. If
a device fails, replace immediately with only
genuine manufacturer replacement part.
Serious injury or death may
occur if system safety's are not
properly maintained.
Serious injury or death may
occur from gas leaks.
Serious injury or death may
occur from improper installation. Installation of this unit including all gas piping must comply with all local, state and national
codes. (Standards to be followed include the
National Fuel Gas Code ANSI Z223.1/NFPA
No. 54. In Canada; Refer to the CSA B149.1
Gas Installation Code).
Use appropriate fuel (natural gas or L.P.-Gas
Vapor) for the machine you are using.
Do not connect gas lines to the pressure
washer before testing gas piping pressure or
there may be damage to the gas valve.
Do not adjust gas pressure above recom-
mended levels. Excessive pressure may
cause damage to the valve.
Liquid propane models are designed to run
on vapor propane fuel. Do not use liquid
fuel.
Do not replace or rell L.P.-Gas tank while unit
is running.

Operator's Manual 5
POTENTIAL CONSEQUENCE PREVENTION HAZARD
Serious injury or death may occur
from inhaling burner exhaust or
dangerous vapors.
Installation of this unit including the
ventilation of the combustion gases must
comply with all local, state and national
codes. (Standards to be followed include
the National Fuel Gas Code ANSI Z223.1/
NFPA No. 54. In Canada; Refer to the CSA
B149.1 Gas Installation Code).
Always make certain there is adequate
ventilation (fresh outside air) for breathing
and combustion. This will prevent the
buildup of dangerous carbon monoxide
gases. Beware of poorly ventilated areas,
or areas with exhaust fans which can
cause poor air exchange.
If you smell gas, shut off the gas supply to
the appliance, extinguish any open ame,
and test all joints with a soap solution. If
the odor persists, call you gas supplier
immediately.
Follow all safety instructions provided with
the materials you are spraying. Use of a
respirator may be required when working
with some materials. Do not use this
pressure washer to dispense hazardous
materials.
RISK OF ASPHYXIATION
SAFETY WARNINGS
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER

6 Operator's Manual
POTENTIAL CONSEQUENCE PREVENTION
HAZARD
RISK OF
ELECTROCUTION
OR
ELECTRIC SHOCK
Serious injury or death could occur if
the pressure washer is not properly
grounded. Your pressure washer
is powered by electricity and may
cause electric shock or electrocution
if not used properly.
Installation of this unit including all
electrical connections must comply
with all local, state and national codes.
(Standards to be followed include NFPA
No. 70/NEC National Electrical Code.
In Canada; Refer to the CSA C22.1
Canadian Electrical Code Part 1)
This unit must be connected to a
grounded, permanent wiring system; or
an equipment-grounding conductor must
be run with the circuit conductors and
connected to the equipment-grounding
lead on the unit.
Make sure the pressure washer is
connected to a properly grounded source
which provides correct voltage and
adequate fuse protection. Disconnect
from power source when not in use or
when making repairs.
Do not attempt to light the pilot manually
as the electronic spark ignition lights the
pilot automatically.
Never operate pressure washer with
electrical enclosures open, removed or
damaged.
Do not touch machine while standing in
water or with wet hands. Never let the
electrical supply or any connections lay
in the water.
DO NOT direct spray on or into electrical
installations of any kind! This includes
electrical outlets, light bulbs, fuse boxes,
transformers, the unit itself, etc.
DO NOT allow metal components of the
pressure washer to come in contact with
live electrical components.
Any electrical wiring or repairs performed
on this pressure washer should be
done by authorized service personnel
in accordance with local and national
electrical codes.
Before opening any electrical enclosure,
always shut off the pressure washer,
relieve pressure and disconnect the
pressure washer from the power source.
Allow pressure washer to cool down.
Never assume the pressure washer is
safe to work on just because it is not
operating. It could restart at any time!
Electrical shock may occur if
pressure washer is not operated
properly.
Serious injury or death may occur
from contact with electricity.
Serious injury or death may occur if
electrical repairs are attempted by
unqualied persons.
Serious injury or death could result
from improper installation.
SAFETY WARNINGS
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER

Operator's Manual 7
Serious injury or death could
occur from high pressure spray
penetrating the skin.
Keep clear of nozzle and spray! Never put
your hand, ngers or body directly over the
spray nozzle.
Never point the high pressure discharge
stream at persons.
This equipment is to be used only by
trained operators.
Always keep operating area clear of all
persons.
To reduce the risk of injury, close
supervision is necessary when using this
equipment near children. DO NOT allow
children to operate this unit.
SEEK EMERGENCY MEDICAL CARE if
the spray appears to have penetrated the
skin! DO NOT TREAT AS A SIMPLE CUT!
Be prepared to tell a physician exactly what
kind of cleaning agents you were using
by reading the Material Safety Data Sheet
(MSDS) provided with your detergent.
High pressure hoses should be inspected
daily for signs of wear. If evidence of
failure exists, promptly replace all suspect
hoses to prevent the possibility of injury
from the high pressure spray. If a hose or
tting is leaking, NEVER PLACE YOUR
HAND DIRECTLY ON THE LEAK.
Before using pressure washer, or when
quick connecting high pressure hoses and
spray nozzles, be certain the "collar" on the
female quick connect is locked securely to
prevent accidental discharge and that all
quick coupler ttings are secure.
NEVER operate the gun with the trigger
wired in the open position. To prevent
accidental discharge, the trigger gun
should be securely locked when not in use.
Before removing the spray nozzle or
servicing the unit, ALWAYS shut off the
unit and trigger the gun to release trapped
pressure. (Even after you shut off the
unit, there is high pressure water left in the
pump, hose and gun until you release it by
triggering the gun.)
POTENTIAL CONSEQUENCE PREVENTION
HAZARD
SAFETY WARNINGS
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER
RISK OF INJECTION
OR
SEVERE CUTTING INJURY

8 Operator's Manual
RISK OF BURNS
RISK OF BURSTING
RISK FROM MOVING PARTS
Serious injury may occur from
touching the heat exchanger or
vent piping. These areas can
remain hot for some time after the
pressure washer is shutdown.
Never make adjustments to the factory
set pressures.
If burner fails to shut off, turn off the gas
supply and contact your serviceman.
Never exceed manufacturers maximum
allowable pressure rating of attachments.
Do not allow any hoses to make contact
with the heat exchanger to prevent the
possibility of bursting. Avoid dragging the
hoses over abrasive surfaces such as
cement.
Use only manufacturer recommended
repair parts for your pressure washer.
In freezing temperatures, the unit must
always be warm enough to ensure there
is no ice formation in the unit. Do not
start the pressure washer without rst
allowing the unit to thaw.
Never allow any part of your body to
contact the heat exchanger or the vent
piping.
POTENTIAL CONSEQUENCE PREVENTION
HAZARD
Serious injury may occur to the
operator from moving parts on the
pressure washer.
Do not operate the unit without all
protective covers in place or make any
adjustments without shutting off the
pressure washer, relieving pressure
and disconnecting the pressure washer
from the power source. Allow pressure
washer to cool down. Never assume
the pressure washer is safe to work on
just because it is not operating. It could
restart at any time!
Serious injury may occur from a
pressure washer malfunction or
exploding accessories if incorrect
system components, attachments
or accessories are used.
Serious injury or death may occur
if attempting to start the pressure
washer when the unit is frozen.
SAFETY WARNINGS
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER

Operator's Manual 9
RISK OF BODILY INJURY
Serious injury or death may occur
from detergents contacting or
penetrating the skin.
SEEK EMERGENCY MEDICAL CARE if
the spray appears to have penetrated the
skin! DO NOT TREAT AS A SIMPLE CUT!
Be prepared to tell a physician exactly what
kind of cleaning agents you were using
by reading the Material Safety Data Sheet
(MSDS) provided with your detergent.
Never use any solvents or highly corrosive
detergents or acid type cleaners with this
pressure washer.
Protective equipment such as rubber suits,
gloves and respirators are advisable,
especially when using cleaning detergents.
Keep all detergents out of the reach of
children!
ALWAYS wear protective goggles when
operating the unit to shield the eyes from
ying debris and detergents.
DO NOT direct spray toward fragile
materials such as glass for shattering could
occur.
Stay alert-watch what you are doing. Do
not operate the unit when fatigued or under
the inuence of alcohol or drugs.
NEVER squeeze the trigger unless
securely braced.
DO NOT overreach or stand on unstable
support.
Wet surfaces can be slippery, wear
protective foot gear and keep good footing
and balance at all times.
NEVER trigger the gun while on a ladder
or roof.
ALWAYS hold on rmly to the gun/lance
assembly when starting and operating the
unit. Failure to do so can cause the lance
to fall and whip dangerously.
Know how to stop the pressure washer and
bleed pressures quickly. Be thoroughly
familiar with controls.
DO NOT leave pressurized unit
unattended. Shut off the pressure washer
and release trapped pressure before
leaving.
DO NOT operate the unit if you see any
oil or water leaks from the machine. DO
NOT resume operation until the unit has
been inspected and repaired by a qualied
serviceman.
Never make adjustments on the machine
while in operation.
Before servicing the unit: shut off the
pressure washer, relieve pressure and
disconnect the pressure washer from the
power source. Allow pressure washer to
cool down. Never assume the pressure
washer is safe to work on just because it is
not operating. It could restart at any time!
POTENTIAL CONSEQUENCE PREVENTION
HAZARD
Serious injury can occur from
loose debris being propelled at a
high speed from the spray gun.
Injury may occur if the operator
loses his balance caused by the
thrust of water traveling through
the spray nozzle.
Injury may occur from the
pressure washer.
SAFETY WARNINGS
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER
SAVE THESE INSTRUCTIONS

10 Operator's Manual
HG-SERIES FEATURES
HG SERIES FEATURES-032905-RZ

Operator's Manual 11
FEATURES LISTING
1. Exhaust Outlet
2. Draft Diverter
3. Heat Exchanger
4. Pressure Switch
5. Pressure Trapping Unloader
6. Heat Dump Valve
7. High Pressure Pump
8. Gas Shut Off Valve
9. Gas Valve
10. High Pressure Outlet
11. Fork Truck Access
12. Nozzle Storage
13. Detergent Metering Valve
14. Pump Switch w/Indicator Light
15. Burner Switch w/Indicator Light
16. Detergent Strainer
17. Electrical Enclosure
18. Adjustable Thermostat
19. Electrical Junction Box
20. Float Tank w/Filter
21. Water Inlet
22. Gas Supply Inlet
23. Pressure Relief Valve
24. Decal- Nozzles
25. Decal- Electric Box Switches (Pump/Burner)
26. Decal- Operation
27. Decal- Detergent Valve
28. Decal- Warning/Caution
29. Decal- Warning: Risk of Injury/Exposed Pulleys
30. Decal- Warning: Hot Surfaces
31. Access Panel
32. High Pressure Hose
33. Trigger Gun
34. Trigger Safety Lock
35. Insulated Lance
36. Adjustable Pressure Dual Lance
37. High Pressure Nozzles

12 Operator's Manual
1. This unit should be installed indoors by a qualied serviceman in a non-
freezing, dry environment away from damaging winds and rain. If any part of
the unit becomes frozen, excessive pressure may build up in the unit which
could cause it to burst resulting in possible serious injury to the operator or
bystanders. Normal precautions should be taken so that excess moisture
does not reach the electrical controls or the power unit.
2. It should be placed in an area away from ammable or combustible material.
These types of material should be kept at least 20 feet away from the gas-
red units.
3. Avoid small areas and exhaust fans. Combustion becomes difcult and
carbonmonoxidemayresultintheseareas. Allow enoughspace forservicing.
Some codes will require certain distances from walls and ooring. Two feet
away from the walls should sufce.
4. This unit should only be placed on a level surface to ensure proper lubrication
for the water pump while operating. NEVER spray water directly on the
unit.
5. DO NOT place unit in an area:
a. where ammable gas vapors may be present.
b. with insufcient ventilation.
c. where there is evidence of oil or fuel leaks.
RISK OF EXPLOSION OR FIRE!
DO NOT PLACE UNIT IN AN
AREA WHERE FLAMMABLE
GASVAPORSMAYBEPRESENT.
A SPARK COULD CAUSE AN
EXPLOSION OR FIRE!
RISK OF UNIT BURSTING!
DO NOT LOCATE THE UNIT IN
FREEZING ENVIRONMENTS!
RISK OF ASPHYXIATION!
USE THIS PRODUCT ONLY IN
WELLVENTILATEDAREAS! THE
EXHAUST CONTAINS CARBON
MONOXIDE, A POISONOUS,
ODORLESS AND INVISIBLE
GAS. BREATHING THIS GAS
CAN CAUSE SERIOUS INJURY,
ILLNESS & POSSIBLE DEATH.
INSTALLATION
ELECTRICAL:
1. Installation of this unit should be performed by a qualied serviceman and
all electrical installation must conform to all local, state and national codes,
including NFPA No. 70 (NEC) National Electrical Code. In Canada; Refer
to the CSA C22.1 Canadian Electrical Code Part 1.
2. This unit comes to you with the wires terminating in a junction box inside
the cabinet. You must supply the incoming power source.
3. Ensure electrical supply is identical to the specications listed on the pressure
washer data plate.
4. Ensure all connections are secure and covers are replaced.
LOCATION AND PLACEMENT:
RISK OF ELECTROCUTION!
THISUNITMUSTBECONNECTED
TO A PROPERLY GROUNDED
OUTLET.
DANGER
WARNING
WARNING

Operator's Manual 13
INSTALLATION
1. Installation of this unit should be performed by a qualied serviceman
and all gas piping must conform to all local, state and national codes,
including the National Fuel Gas Code ANSI Z223.1/NFPA No. 54. In
Canada; Refer to the CSA B149.1 Gas Installation Code.
2. Turn off gas and electricity before starting installation or service.
3. The gas line to the burner should be a separate supply from the meter
because of the burner demand. Use new pipe and locate it with future
service in mind. Use only black pipe or tubing suitable for gas applications
and make sure the pipe is free from cutting burrs and defects. Use joint
compound (not teon tape) only on male ttings, leaving clean the rst
two threads to be engaged. DO NOT use compound on female threads
where it can be pushed into the line and cause gas valve failure.
RECOMMENDED PIPE SIZES FOR GAS SUPPLY LINE
(Refer to illustration #1 for the following:)
4. Following the gas line from the meter or regulator, before the machine,
install a manual main shut-off valve.
5. Down stream from the main shut-off valve, a tee and drip leg should be
installed to catch debris and moisture. This leg must be capped.
6. A 4" nipple and gas regulator should be installed off of the tee. This
regulator should control gas pressure down to 3"-12" W.C.P.
7. On the other side of the regulator, another 4" nipple and union should
be installed.
8. After the union and before the gas valve on the unit, a manual shut-off
valve should be installed with a 1/8" NPT plugged tapping accessible for
test gauge connection between it and the union.
GAS PIPING:
ILLUSTRATION #1
GAS SUPPLY PIPING
NATURAL GAS L.P.-GAS
DISTANCE TO UNIT
FROM REGULATOR
PIPE SIZE DISTANCE TO UNIT
FROM REGULATOR
PIPE SIZE
0-50 Feet 1-1/2" 1PS 0-50 Feet 1" 1PS
50-100 Feet 2" 1PS 50-100 Feet 1-1/2" 1PS
100-200 Feet 2-1/2" 1PS 100-200 Feet 1-3/4" 1PS

14 Operator's Manual
INSTALLATION
VENTILATION:
1. Installationof this unit inanindoororinanenclosed areashouldbeperformed
by a qualied serviceman and all venting must conform to all local, state and
national codes, including the National Fuel Gas Code ANSI Z223.1/NFPA
No. 54. In Canada; Refer to the CSA B149.1 Gas Installation Code. The
burner exhaust should be stacked to the outside atmosphere and a draft
diverter should be installed as well.
NOTE: There should be no more than 6500 BTU per square inch of ue.
2. A draft diverter must be installed above the exhaust outlet. This diverter
breaks the chimney effect and enhances the draft through the burner for a
more efcient ame. It also helps prevent cold air downdrafts from freezing
the heat exchanger. (See illustration #2)
3. Install the recommended ue pipe per local, state and national codes,
including the National Fuel Gas CodeANSI Z223.1/NFPANo. 54. In Canada;
Refer to the CSA B149.1 Gas Installation Code. If the ue pipe exceeds 10
feet in length or contains more than two elbows, the natural draft may be
eliminated and the burner will not ignite. DO NOT install a movable ue
pipe damper.
4. If the unit is being installed in an enclosed room, provide adequate air for
combustion by installing openings to the room near the ceiling for ventilation
and near the oor for burner combustion. These openings should be sized
using one square inch for each 1000 BTU per inch of the machine.
Example: A pressure washer with a 400,000 BTU input requires openings of 400
square inch or approximately 3 feet x 1 foot. (See illustration #3).
5. If the building in which the unit is being installed seems unusually tightly
constructed,itisrecommendedthatairintakes extending to the outside of the
building be employed to supply combustion air. End the intakes outside the
building with a downward opening to protect these intakes from snow and/or
rain. Include a mesh screen no smaller than 1/4" over the opening.
ILLUSTRATION #2
DRAFT DIVERTER
ILLUSTRATION #3
ENCLOSED ROOM VENTILATION

Operator's Manual 15
INSTALLATION
HIGH PRESSURE CONNECTION:
Connect the high pressure discharge hose by connecting one end to the
pressure washer and the other end to the gun assembly. Make certain the
quick connects are securely locked together. (See illustration #5 and #6)
ILLUSTRATION #5
HIGH PRESSURE HOSE CONNECTION
ILLUSTRATION #6
QUICK CONNECT
ILLUSTRATION #4
HOSE CONNECTION
WATER SUPPLY:
1. Select a water supply hose which is a quality grade of garden hose
measuring at least 3/4" ID and no longer than 50'. (See illustration #4)
2. Connect one end of the water supply hose to the water inlet of the unit.
Connect the other end of the hose to your pressurized water supply.
NOTE: If there is a high mineral content in your water, it is recommended
that a water softener be used to prevent the possibility of excessive
scale buildup inside the heat exchanger coil.
3. Be certain all connections are securely tightened.
a. Water supply hose to the Water Inlet on the unit.
b. Water supply hose to the Pressurized Water Supply.
4. Follow the incoming water requirements listed below:
a. Water pressure must be between a minimum of 20 pounds per
square inch (PSI) and a maximum of 65 PSI.
b. Incoming GPM must be approximately one gallon more than
the outgoing GPM stated on the pressure washer I.D. Plate.
(You can check GPM by timing how long it takes to ll a 5 gallon
container.)
c. Incoming water temperature must not exceed 125°F. Excessive
pump damage may result if the water temperature exceeds this
acceptable level.
NOTE: If the water supply is inadequate or the hose is kinked, the unit will
run rough and the burner will not re.
5. Never allow the unit to operate without the incoming water line attached
and the water supply completely turned on.

16 Operator's Manual
ILLUSTRATION #7
MAKING A MANOMETER
INSTALLATION
INSPECTING AND VERIFYING CONDITIONS:
1. Check to ensure the building is not weakened by the installation of this
unit and make sure the piping is secure.
2. Check gas pressure and check all gas piping for leaks.
a. Ensure all gas connections are made and close the valve before the
gas valve on the machine.
b. Immediately afteropening themainvalve, coatallpiping andconnections
with soapy water to check for gas leaks. Defective piping and ttings
should be replaced immediately.
c. After the meter and all piping have been checked for leaks, purge the
air from the system by removing the test tapping plug and bleeding the
line into a well-ventilated area to protect against potential re hazard.
d. If a commercial manometer is not available, make one by using a clear
tube about 1/2 full of water and shape it like a U. (See illustration #7)
With the main shut-off valve closed, connect a hose barb tting into the
test tapping, connect the hose and mark the water level as shown.
e. Turn on the main gas valve and check the water column level by mea-
suring the distance the two water levels rose and dropped from starting
level. This must not exceed 14" W.C. (See illustration #8) Start the
unit and check pressure with burner running. The gas pressure at this
point should be 3-7" W.C. for N.G. and 8-12" W.C. for L.P.-Gas.
f. Turn off the main shut-off valve, remove test tting and replace plug.
g. Using a 3/16" hex key wrench, remove plug from test port on gas valve
inside the pressure washer (see illustration #9) and connect your ma-
nometer or test tube.
h. Turn on manual shut-off valve and gas regulating valve. Operate the
unit so the burner runs and check the manifold pressure. The gas pres-
sure at this point should be 2"-4" W.C. for N.G. and 8.5"-9.5" W.C. for
L.P.-Gas.
i. Shut off the unit and manual shut-off valve, remove manometer or test
tube and replace plug.
3. Adjusting the gas regulator on the gas valve normally IS NOT necessary
since it is preset at the factory; however, if it is necessary, follow these
instructions:
a. Using a 3/16" hex key wrench, remove plug from test port on gas valve
inside the pressure washer (see illustration #9) and connect your ma-
nometer or test tube.
b. While running the burner, use the screwdriver to adjust the gas pressure
(clockwise to increase and counterclockwise to decrease).
c. When nished, shut off the unit and manual shut-off valve, replace the
adjustment cap, remove manometer or test tube and replace plug.
ILLUSTRATION #8
MEASURING WATER COLUMN
ILLUSTRATION #9
ADJUSTING GAS REGULATOR

Operator's Manual 17
INSTALLATION
QUESTIONS
CODES:
1. Does the electrical supply meet respected codes?
2. Does all gas supply piping meet respected codes?
3. Does the ventilation system meet respected codes?
LOCATION:
1. Is the unit installed indoors on a level surface in a dry area protected
from excessive wind, rain and moisture?
2. Is the unit located away from flammable and combustible
material?
3. Is the unit located in a large enough area for adequate air ow?
ELECTRICAL:
1. Is the unit properly grounded?
2. Do all electrical components used meet requirements shown on
the unit I.D. Plate and is the voltage correct?
GAS SUPPLY:
1. Is the proper fuel type (N.G. or L.P.-Gas) being used for your
pressure washer?
2. Does the gas supply meet the demand of the BTU rating of the
burner?
3. Has the proper gas regulator been installed for the proper pressure
and ow?
4. Isallpipingtherightsizeandhaveallgasconnections been checked
for leaks?
5. Is the gas valve completely open?
6. Is the incoming gas pressure 3"-7" W.C. for N.G. and 8"-12" W.C.
for L.P.-Gas?
7. Are the propane tanks (if applicable) employed large enough to
avoid freezing according to the unit's rating?
VENTILATION:
1. Are the correct ue pipe and draft hood sizes employed?
2. Is there adequate ventilation for burner combustion?
3. Is the unit properly vented to allow adequate air ow?
4. Is exhaust stacked to outside atmosphere?
GENERAL:
1. HavealloperatorsusingthisunitreadtheInstallation and Operator's
Manual and understood all safety warnings?
2. Has the unit been installed by qualied service people who followed
the Installation and Operator's Manual instructions?
3. Is there ample water supply?
YES NO
PRE-OPERATION CHECKLIST:
Before starting the unit, answer the questions in this checklist:
IF NO WAS MARKED FOR ANY OF THESE QUESTIONS, CORRECT THE SITUATION
BEFORE OPERATING THIS GAS-FIRED UNIT.

18 Operator's Manual
PREPARATION
ATTIRE:
Proper attire is essential to your safety. It is advised to utilize whatever means
necessary to protect eyes, ears, and skin. Additional safety attire (such as
respiratory mask) may be required when using detergent cleaning agents with
this pressure washer.
PRE-START:
1. Before lighting, smell all around the machine for gas. Especially, sniff the
oor area because some gas is heavier than air and will settle on the oor.
Do not operate unit if smell exists. Leave the location and contact a qualied
serviceman.
2. Check to ensure the voltage is on.
3. Pump oil level should be checked before each use. Check the oil level with
the dipstick on top of the pump crankcase. (See illustration #10.) The proper
oil level should be at the notch on the dipstick. If the level appears low, use
pump oil SAE20 or 30 non-detergent.
ILLUSTRATION #10
PUMP-REAR OIL GAUGE
DANGER
RISK OF EXPLOSION OR FIRE!
UNLOADER:
The unloader has been preset at the factory and should only be adjusted by a
trained serviceman.
SMELL FOR GAS BEFORE
STARTING UNIT. ALWAYS SNIFF
AREA AROUND THE MACHINE
FOR A GAS SMELL. BE SURE TO
SNIFFFLOORAREA,SINCESOME
GAS IS HEAVIER THAN AIR AND
WILL SETTLE ON THE FLOOR.
IF YOU SMELL GAS:
•DO NOT START UNIT.
•DO NOT OPERATE ANY
ELECTRICAL SWITCH.
•DO NOT LIGHT ANY
APPLIANCE.
•DO NOT USE ANY PHONE IN
THE ROOM OR AREA.
•LEAVE, GO TO ANOTHER
LOCATION AND USE A PHONE
TO CALL YOUR GAS
SUPPLIER.
•FOLLOW THE GAS SUPPLIER'S
INSTRUCTIONS.
•IF YOU CANNOT REACH YOUR
GAS SUPPLIER, CALL THE FIRE
DEPARTMENT.

Operator's Manual 19
PREPARATION
QUICK-CONNECT NOZZLES:
Variousnozzlesmaybequickconnectedintotheendoftheadjustablepressure
dual lance to change the spray pattern or use the detergent feature. When
using Quick- connects (Q.C.), be certain the connection is securely locked.
(See illustration #11). If not, the high pressure water may shoot the nozzle
from the lance, causing severe injury or serious damage. To determine
spray fan, (see illustration #12) refer to the actual number stamped on the
nozzle. The rst two digits indicate the spray fan in degrees, i.e., 00=0°,
15=15°, 25=25°, 40=40°.
1. The0°nozzle (RED): Thisisablastingnozzle.Itdeliversaveryconcentrated
stream of water. Be cautious when using the straight narrow stream. It is
not recommended for use on painted or wood surfaces or items attached
with adhesive backings. Uses: Removing weeds from sidewalk cracks,
stubborn stains from concrete, masonry, aluminum and steel, caked mud
from equipment, and cleaning lawn mower undersides.
2. The 15° nozzle (YELLOW): This is a chiseling nozzle. The spray should
be directed at a 45° angle to the surface and used like a scraper to
remove paint, grease and dirt. Uses: Surface preparation (removing
mildew stains and paint chips).
3. The 25° nozzle (GREEN):
a. This is a ushing nozzle. This pattern is best suited for ushing
dirt, mud, and grime. Uses: Wet sweeping leaves from walk,
curbs and driveways, cleaning stable oors, washing swimmin
pool bottoms, degreasing engines.
b. On units with steam option, this nozzle is used for 250°F Wet
Steam operation. This nozzle is sized for operation with the
unloader and steam valve (where applicable) to provide high
pressure wet steam. Replacement of this nozzle with an improp-
erly sized nozzle may cause operational problems with the
machine.
4. The 40° nozzle (WHITE): This is a wash nozzle. This wide spray pattern
disperses the water pressure over a large area and is recommended
for moderate washing. Uses: Washing down aluminum siding, cleaning
windows, washing vehicles, spraying sidewalks, driveways, and
patios.
ILLUSTRATION #11
QUICK CONNECT
ILLUSTRATION #12
Q.C. NOZZLES
1. Ensure the trigger gun is locked in the OFF position. (See illustration
#13)
2. The quick-connect nozzle should be disconnected from the adjustable
pressure dual lance at this time. As shown in illustration #14, retract the
locking ring on the quick-connect tting to remove the nozzle.
ILLUSTRATION #14
NOZZLE CONNECTION
NOZZLE CONNECTION:
WARNING
RISK OF INJECTION CAUSING
SEVERE INJURY!
THE TRIGGER GUN SHOULD
ALWAYS BE LOCKED IN THE OFF
POSITION WHEN NOT IN USE!
NEVER LOOK DIRECTLY AT
THE NOZZLE UNLESS IT IS
DISCONNECTED FROM THE
TRIGGER GUN/DUAL LANCE
ASSEMBLY!
ILLUSTRATION #13
GUN LOCK

20 Operator's Manual
PREPARATION
1. This unit features a adjustable pressure dual lance with adjustable pressure
which allows the user to select a high or low pressure "fan" spray. Simply
rotate the adjustable grip on the dual lance to achieve the desired pressure
selection.
a. Selection of high pressure can be achieved by turning the adjustable
grip on the dual lance counterclockwise as shown in illustration #15.
b. Selection of low pressure can be achieved by turning the adjustable
grip on the dual lance clockwise as shown in illustration #15. If using
the detergent injector accessory, once the pressure is low enough, this
injector on the pressure washer will draw detergent into the system. A
water/detergent mixture exits from both the spray nozzle and detergent
nozzle.
1. Before starting the unit, perform the following procedures:
a. Check for gas smell. If a gas smell is detected, DO NOT START UNIT!
See "Risk of Explosion or Fire" warnings, pg. 4.
b. Check all hose connections to ensure they are securely tightened.
c. Inspect for system water and oil leaks.
d. Inspect high pressure hoses for kinking, cuts and leaks. If a cut or leak
is found, DO NOT USE HOSE! Replace hose before starting unit. See
"Risk of Injection" warnings, pg. 7. Be sure that all damaged parts are
replaced and that the mechanical problems are corrected prior to opera-
tion of the unit. If you require service, contact your Customer Service
Represenative.
ILLUSTRATION #15
DUAL LANCE
DUAL LANCE ASSEMBLY WITH ADJUSTABLE PRESSURE:
PRE-START INSPECTION PROCEDURES: