Burner T roubleshooting22-23
Preventativ e Maintenance Schedule & Oil Change Record24
Hose & Spray Gun Assembly25
Exploded Vie w , Left Side26
Exploded Vie w , Right Side27
Exploded View , Parts List28-30
TNG Float Tank Assembly31
Burner Assembly , Exploded View32
Burner Assembly, Exploded Vie w, Parts List33
Control Panel34
Control Panel, P arts List35
Electrical Box, Standard36
Electrical Box, Standard, Parts List37
3
97-610, 97-6152 • REV. 4/04
Page 4
CONTENTS
Electrical Box, Time Dela y38
Electrical Box, Time Dela y, Parts List39
Electrical Box, Auto Start40
Electrical Box, Auto Start, Parts List41
Warranty
Model Number ______________________________
Serial Number ______________________________
Date of Purchase ____________________________
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 f or future reference.
4
97-610, 97-6152 • REV. 4/04
Page 5
INTRODUCTION
WARNING
WARNING
Thank you for purchasing our Pressure Washer.
This manual covers the operation and maintenance of
the 301001D , 301007D, 352001A, 352007A, 402001A,
402007A, 402001B, 402007B, 402001C, 402007C,
502001A, 502007A, 502001B, 502007B, 502001C,
502007C, 353001A, 353007A, 353001B, 353007B,
353001C, 353007C, 503001B , 503007B, 503001C and
503007C model washers. All information in this manual
is based on the latest product information available at
the time of printing.
We reserve the right to make changes at any time without incurring any obligation.
This machine was designed for
maximum use of 4 hours per day,
5 days per week.
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 . W arning 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 manufacturers’ 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 .
IMPORTANT SAFETY
INFORMATION
WARNING: When using this machine basic precautions should always be follo wed, including the f ollowing:
CAUTION
READ OPERATOR’S
MANUAL
THOROUGHLY
PRIOR TO USE.
2. All installations must comply with local codes. Contact your electrician, plumber, utility company or
the selling distributor for specific details.
CAUTION: To reduce the risk of
injury, read operating instructions carefully before using.
1. Read the owner's manual
thoroughly. Failure to follow
instructions could cause malfunction of the machine and
result in death, serious bodily
injury and/or proper ty damage.
97-610, 97-6152 • REV. 4/04
T o comply with the National Electrical code (NFPA
70) and provide additional protection from risk of
electric shock, this pressure washer is equipped
with a UL approved ground f ault circuit interrupter
(GFCI) power cord for machines rated 250V 30
amp or less, single phase.
3. Know how to stop the machine and bleed pressures quickly. Be thoroughly familiar with the controls.
4. Stay alert. Watch what you are doing.
WARNING: Flammable liquids
can create fumes which can ignite causing property damage
or severe injury .
5. Risk of explosion - Do not
spray flammable liquids or
RISK OF EXPLOSION:
DO NOT SPRAY
FLAMMABLE
LIQUIDS.
operate in an explosiv e location. Operate only where
open flame or torch is permitted.
WARNING: Keep water spray
away from electrical wiring or
fatal electric shock may result.
Read warning tag on electrical
cord.
6. To protect the operator from
KEEP WA TER SPRAY
AWAY FROM
ELECTRICAL WIRING.
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. Alwa ys disconnect pow er before servicing.
WARNING: Spray gun kicks back. Hold with both
hands.
7. Grip cleaning wand securely with both hands before starting the cleaner. Failure to do this could
result in injury from a whipping wand.
WARNING
W ARNING: Equipment can produce a high pressure stream of
fluid that can pierce skin and its
underlying tissues, leading to
serious injury and possible
amputation.
RISK OF INJECTION
OR SEVERE INJURY
TO PERSONS. KEEP
CLEAR OF NOZZLE.
8. High pressure developed by
these machines can cause
personal injury or equipment
damage. Use caution when operating. Do not direct discharge stream at anyone or at any part of
the body , or se v ere injury or death will result. This
machine is to be used only by qualified operators.
PRESSURE WASHER
OPERATOR’S MANUAL
5
Page 6
WARNING
CAUTION: Hot discharge fluid.
Do not touch or direct discharge stream at persons.
9. Never make adjustments on
machine while in operation.
EXTREMEL Y HOT :
USE CAUTION WHEN
OPENING LID.
WARNING
PRESSURE W ASHER
WARNING: High pressure can
cause paint chips or other particles to become airborne and
fly at high speeds.
EYEWEAR AND
CLOTHING MUST
OPERATOR’S MANUAL
PROTECTIVE
BE WORN.
WARNING
10. Eye safety devices and foot
protection must be worn
when using this equipment.
WARNING: Risk of asphyxiation. Use this product only in a
well ventilated area.
11. When the machine is working, do not cover or place in
a closed space where venti-
RISK OF
ASPHYXIATION.
USE ONLY IN A WELL
VENTILA TED AREA.
lation is insufficient.
12. Machines with spray guns
should not be operated with
the trigger in the off position
for extensive periods of time as this may cause
damage to the pump.
13. Protect from freezing.
14. Be certain all quick coupler fittings are secured
before using pressure washer.
15. Do not allow acids, caustic, or abrasive fluids to
pass through the pump.
16. Inlet w ater m ust be cold and clean fresh w ater.
17. 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 duringoperation.
18. The best insurance against an accident is precaution and knowledge of the machine.
19. Do not operate this product when fatigued or under the influence of alcohol or drugs. K eep operating area clear of all persons.
20. Do not replace LP tank while machine is running.
Serious injury could result.
WARNING
WARNING: Use only vapor pr opane fuel.
21. This equipment is designed
to run on vapor fuel. Do not
use liquid fuel. Ha ve a qualified serviceman install and
RISK OF FIRE.
DO NOT USE WITH
FLAMMABLE LIQUIDS.
service your equipment.
22. Never expose a spark or
flame where unburned gas
may be present.
23. Never attempt to light pilot unless pilot manual
valve has been shut off f or 5 min utes.
24. A conv ersion kit, as supplied by the manuf acturer,
shall be used to convert natural gas to propane.
25. L.P. gases are heavier than air and will spill out on
the floor. Therefore always provide adequate space
and ventilation around these machines. Install
machine 18" above the floor .
26. Manufacturer will not be liable for any changes
made to our standard machines, or any components not purchased from the manufacturer .
27. Do not overreach or stand on unstable support.
Keep good footing and balance at all times .
28. Follow maintenance instructions specified in the
manual.
29. When making repairs disconnect from electrical
source and shut off gas valve.
30. Turn burner off, open spray gun and cool to 100°
F before turning machine off.
WARNING
31. Extinguish any open flame
and test all joints with a soap
solution. If odor persists , call
your gas supplier immediately.
32. Not suitable for connection
RISK OF EXPLOSION:
IF GAS SMELL
PRESENT TURN
OFF SUPPLY
to Type B gas vent if the stack
temperature exceeds 243° C
(470° F).
33. A draft div erter shall be installed if this machine is
going to be permanently installed and vented to
the outside of the building.
6
97-610, 97-6152 • REV. 4/04
Page 7
COMPONENT IDENTIFICATION
Main Gas
Supply Inlet
1/2 psig
PRESSURE WASHER
Wand Quick
Coupler
Detergent
Valve
Pressure
Nozzle
Spray
Wand
Burner
Switch
Pump
Switch
OPERATOR’S MANUAL
Spray
Gun
Trigger
Water Supply
Hose
(not included)
Detergent Bucket
(optional)
Pump — Dev elops high pressure.
Pump/Burner Switch— Controls operation on ma-
chine.
Spray Gun — Controls the application of water and
detergent onto cleaning surface with trigger device. Includes safety latch.
Detergent V alve — Allows you to siphon and mix detergents.
Wand — Must be connected to the spra y gun.
High Pressure
Hose
High Pressure Hose — Connect one end to water
pump discharge nipple and the other end to spray gun.
Wand Quick Coupler — Pulling the br ass collar back
allows the insertion of pressure nozzle.
Note: If trigger on spray gun is released for more
than 2 minutes, water will leak from valve. Warm
water will discharge from pump protector onto
floor. This system prevents internal pump damage.
7
97-610, 97-6152 • REV. 4/04
Page 8
PRESSURE W ASHER
OPERATOR’S MANUAL
INSTALLATION
9.57" I.D.
11-3/4"
High Pressure Out
Fresh Water
In 1.0" GHF
1-1/4"
3.0"
44-1/4"
49-0"
38-3/8"
Gas In
1-1/2" NPT-M
27-1/2"
8
97-610, 97-6152 • REV. 4/04
Page 9
INSTALLATION
PRESSURE WASHER
INSTALLATION
Place machine in a convenient location providing ample
support, drainage and room for maintenance (see page
6).
Location:
The location should protect the machine from damaging
environmental conditions, such as wind, rain and freezing.
1. The machine should be run on a level surface
where it is not readily influenced by outside sources
such as strong winds, freezing temperatures, rain,
etc. The machine should be located consider ing
accessibility for the replacing of components and
the refilling of detergents, adjustments and maintenance. Normal precautions should be taken by
the operator of the machine to prevent excess
moisture from reaching the power unit or electrical controls.
2. It is recommended that a partition be made between the wash area and the machine to prev ent
direct spray from the spray gun from coming in
contact with the machine. Excess moisture reaching the power unit or electrical controls will reduce
the machine’s lif e 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. If it is necessary to
install a machine in a poorly ventilated area, outside fresh air may hav e to be piped to the burner
and a fan installed to bring the air into the area.
4. Do not locate near any combustible material. K eep
all flammable material at least 20 feet awa y.
Allow enough space for servicing the machine.
Local code will require certain distances from floor
and walls. (Two feet awa y should be adequate).
WARNING: A void small areas or near exhaust fans.
Gas Piping:
Figure 1: DRIP LEG
Drop
Gas
Valve
3"
(7.62 mm)
Minimum
Sediment trap (drip leg) must be
installed in the supply line.
Install a union in the gas line adjacent to and upstream
from the control manifold and downstream from the
manual main shut-off valve. A 1/8" NPT plugged tapping accessible for test gauge connection shall be installed immediately upstream of the gas supply connection for the purpose of determining the gas supply
pressure to the burner, and to pre vent damage to gas
valve.
If a manual gas shut off valve is not in the gas supply
line within six feet of the machine and in an accessible
location, one shall be installed.
Figure 2: UNION LOCATION
Manual
Shut-Off Valve
1/8" NPT Plugged
Pressure Gauge
Flow
Port Location
1/4" Test Port
(6" - 14 W.C.
or 1/2" PSIG)
Gas
Valve
3" (7.62 mm)
Minimum
To
Gas Valve
OPERATOR’S MANUAL
Gas Codes:
Confer with local gas company and with proper municipal officials regarding any specific code or regulations governing the installation. The installation must
conform to local codes.
Electrical:
The machine, when installed, must be electrically
grounded in accordance to local codes. Check for
proper power supply using a volt meter; chec k the serial plate for the correct requirements.
3" (7.62 mm)
Minimum
97-610, 97-6152 • REV. 4/04
Tee
Union
Control Manifold
Pipe
Cap
Floor Level
9
Page 10
INSTALLATION
The following pipe and stac k sizes are just recommendations. Always consult a local plumber and venting
contractor for local codes and regulations during installation.
The following tables are maximum capacity of final
stage pipe in thousands of Btu/hr of commercial propane
From first stage regulator (at tank) to second stage
PRESSURE W ASHER
regulator
The chart below is based on incoming gas pressure of
10 PSI and a pressure drop of 1 PSI. Numbers are f or
straight schedule 40 pipe; fittings further reduce capacity.
The following chart is based on incoming gas pressure of 11 w.c.i. and a pressure drop of .5 w.c.i. Numbers are for straight schedule 40 pipe; fittings further
reduce capacity .
The chart below is based on gas pressure in the range
0-.5 PSI, specific gravity of .6, and pressure loss of
.5 w.c.i. Numbers are for straight schedule 40 pipe;
fittings further reduce capacity.
This machine is used indoors which requires ventilation.
When venting the machine, if the machine is to be in
an enclosed area with a vent pipe, be sure it is the
same size as the stack on the machine. P oor dr aft will
cause the machine to soot and not operate efficiently .
When placing the machine for installation, position the
vent pipe to be as straight as possible and to protrude
through the roof of the building at a proper location
and at sufficient height to eliminate down-draft. Venting of a gas fired machine shall be installed with a downdraft diverter located about 3 ft. abo ve machine.
Input - BTU Per HourDraft Hood & Flue Pipe
Size
250,000 - 320,0008 inch
320,000 - 410,0009 inch
410,000 - 600,00010 inch
600,000 - 750,00012 inch
NOTE: If the vent pipe e xceeds 10 ft. in length, or contains more than two elbows, use ne xt size larger pipe
and draft diverter or the burner will not ignite. No mo vable vent pipe damper should be used on any installation.
the ceiling, each to be sized on the basis of one square
inch or more of free area for each 1,000 BTU input per
hour (see Figure 4).
When a room is of unusually tight construction and
has a ventilating fan, which ma y be used f or e xhausting air outdoors -or has a vented exhaust — it is recommended that combustion air be supplied to the enclosed room through intakes extending to the outside
of the building and terminating in down-turned fittings.
These should be suitably arranged to prev ent obstruction from snow or rain, and include a protecting screen
not smaller than 1/4 inch mesh.
Figure 4
Ventilating Air Opening.
1 square inch for each
1000 BTU per hour input.
OPERATOR’S MANUAL
Draft Diverter:
Install the draft diverter above the heating coil. The
diverter enhances the draft through the burner by severing the chimney effect created in sections of vent
pipe positioned below . It also helps prevent freezing of
the coil due to wind chill factors.
Figure 3
Optional
When in a tightly closed room without ventilation openings to the outdoors or other rooms, provisions shall
be made for supplying air for comb ustion through special openings, one near the floor and the other near
Illustration showing air openings necessary
to supply air for combustion when installed
in an enclosed room.
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 w ater supply is inadequate,
or if the garden hose is kinked, the machine will run
very rough and the burner will not fire.
Water Connection:
Connect the high pressure hose by pulling the coupler
collar back and then inserting it onto the discharge
nipple. Secure it b y pushing the collar f orward.
Attach the wand into the spray gun using teflon tape
on the pipe threads to avoid leaks .
Inspection and Testing Gas Piping:
The building structure should not be weakened by installing the gas piping. The piping should not be supported by other piping, but should be firmly supported
with gas hooks, straps, bands or hangers. Butt or lap
welded pipe should not be run through or in an air duct
or clothes chute.
11
97-610, 97-6152 • REV. 4/04
Page 12
INSTALLATION
Before turning gas under pressure into piping, all openings from which gas can escape should be closed. Immediately after turning on gas, the system should be
checked for leaks. This can be done by watching the
1/2 cubic foot test dial for 5 minutes f or any mov ement
or by soaping each pipe connection and watching for
bubbles. If a leak is found, make the necessary repairs and repeat the above test.
PRESSURE W ASHER
Defective pipes or fittings should be replaced and not
repaired. Never use a flame or fire in any form to locate gas leaks — use a soap solution.
After the piping and meter have been checked completely , purge the system of air. DO NOT bleed the air
inside an enclosed room.
During pressure testing of the system at test pressures
in excess of 1/2 PSIG, the appliance and its individual
shut-off valve must be disconnected from the gas supply piping system or damage to the gas valve will oc-
OPERATOR’S MANUAL
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Gas Pressure:
The ideal incoming gas pressure is 11 water column
inches or w.c.i. (min. 6 wc”, max. 14 wc” or 1/2 PSIG).
The correct operating manifold pressure f or natural gas
is 3.5 wc” The operating manifold pressure f or propane
gas is 10 wc” By adjusting the gas valv e pressure regulator between 3 and 4 wc” a side range can be achie ved
for natural gas. Propane is 6-10 wc”.
If the desired input rating cannot be obtained within
the above manif old pressure adjusting range, then the
next size larger or smaller burner orifice should be
used.
CHECK LIST BEFORE
CAUTION! If “NO” is checked on an y of the following sixteen questions, do not operate this machine.
hose to the spray gun using teflon
tape on hose threads.
Pressure
Nozzle
Wand
Coupler
STEP 2: Pull the spring-loaded col-
lar of the wand coupler back to insert your choice of pressure nozzle.
CAUTION: Never replace nozzles
without engaging the safety latch
on the spray gun trigger .
Cold
Water
Source
Garden
Hose
Pressure
Nozzle
Wand
Coupler
Wand
Collar
STEP 3: Release the coupler col-
lar and push the nozzle until the
collar clicks. Pull the nozzle to
make sure it is seated properly.
Garden
Hose
Water Inlet
OPERATOR’S MANUAL
STEP 4: Connect the high pressure
hose to the pump discharge fitting.
Push coupler collar forward until secure.
STEP 5: Connect garden hose to the
cold water source.
STEP 6: Check inlet filters, remove
debris, then connect the garden
hose to pump water inlet.
CAUTION: Do not run the pump
without water or pump damage
will result.
13
97-610, 97-6152 • REV. 4/04
Page 14
PRESSURE W ASHER
OPERATING INSTRUCTIONS
Cold
Water
Source
Garden
Hose
STEP 1: Review installation instruc-
tions prior to connecting garden
hose to the cold water source and
turn water on completely . Ne ver use
hot water .
OPERATOR’S MANUAL
STEP 4: Depress control knob and
hold it in. After 5 seconds, depress
the red ignitor until you hear a loud
click. Repeat 3 or 4 times if necessary until pilot is lit. If pilot does not
remain lit, repeat operation, allowing a longer period of time before
releasing the knob. After the pilot
lights, continue to hold the control
knob down for 1 minute. Note: Sufficient time must be allowed for a
proper size pilot flame to heat the
thermocouple and hold the safety
magnet in a locked-up position.
STEP 2: Trigger the spray gun to
eliminate trapped air then wait for a
steady flow of water to emerge from
the spray nozzle.
STEP 5: Turn gas cock dial to “PILOT” position.Release dial and turn
to full ON. Push pump s witch ON, or
turn to pump position and pull the
trigger on the spray gun allowing
cold water to flow . T o activ ate the gas
control valve f or hot water , push the
burner switch to the ON position and
pull the trigger on the spray gun.
STEP 3: Have an electrician connect
power supply into junction box according to information shown on the
serial plate before turning gas valve
dial to “pilot” position.
Safety
Latch
WARNING! Never replace
nozzles without engaging the
safety latch on the spray gun trigger.
NOZZLES
The five color-coded quick connect nozzles provide a
wide array of spra y widths from 0° to 45° and are easily
accessible when placed in the conv enient rubber nozzle
holder, which is provided on the front of the machine .
NOTE: For a more gentle rinse, select the white 40° or
green 25° nozzle. To scour the surface, select the yellow 15° or red 0° nozzle. To apply detergent select the
14
black nozzle.
AUTO IGNITION OPTION
If your machine has A uto Ignition option,
follow these steps.
1. Have electrician connect power supply into junction box according to information shown on serial
plate and open main gas supply.
2. Push pump switch to “ON” position, pull trigger on
spray gun.
3. After water and pressure is e xiting pressure nozzle
push burner switch “ON”.
be set at 200°.
4. The pilot will ignite first then you will notice a flash
of light indicating complete ignition.
should hear a clicking sound before the pilot
ignites.
97-610, 97-6152 • REV. 4/04
Note: thermostat should
Note: You
Page 15
DETERGENTS AND GENERAL CLEANING TECHNIQUES
PRESSURE WASHER
WARNING
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 .
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.
STEP 2: Place siphon tube strainer
into detergent container open detergent valve . Place the filter end of detergent suction tube into the detergent container.
Detergent
Valve
Siphon
Strainer
STEP 3: Pull trigger to operate
machine. Liquid detergent is
drawn into the machine and
mixed with water. Apply detergent to work area. Do not allo w
detergent to dry on surface. Follow operating instructions.
IMPORTANT: You must flush
the detergent siphoning system after each use by
placing the suction tube into a bucket of clean water, then run the pressure washer for 1-2 minutes.
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 f eet 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 y ou
clean and rinse any surface. For best surf ace 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 ma y remove
the loose paint from the surface.
• Keep the spray nozzle a saf e distance from the surface you plan to clean. High pressure w ash a small
area, then check the surface f or damage. If no damage is found, continue to pressure washing.
CAUTION - Never use:
• Bleach, chlorine products and other corrosive
chemicals
These chemicals will harm the machine and will damage the surface being cleaned.
RINSING
It will take a few seconds f or the detergent to clear. Apply
safety latch to spray gun. Select and install desired high
pressure nozzle. NOTE: You can also stop detergent
from flowing by removing detergent siphon tube from
bottle.
OPERATOR’S MANUAL
THERMAL PUMP PROTECTION
If you run your pressure washer f or 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 pre vents internal damage to the pump.
15
97-610, 97-6152 • REV. 4/04
Page 16
SHUTTING DO WN AND CLEAN-UP
STEP 2: Tur n/push bur ner
switch to "OFF" position.
Open spray gun allowing
water to cool. Then turn/
push pump switch to “OFF”
position.
PRESSURE W ASHER
STEP 1: Remove detergent suction
tube from container and insert into
one gallon of fresh clean water. Pull
trigger on spray gun and siphon water for one minute.
OPERATOR’S MANUAL
STEP 3: Turn off water
supply.
STEP 4: Press trigger to release water
pressure.
STORAGE
CAUTION: Always store your pressure
washer in a location where the temperature
will not fall below 32°F (0°C). The pump in
this machine is susceptible to permanent damage
if frozen. FREEZE DAMAGE IS NOT COVERED BY
WARRANTY.
1. Stop the pressure washer , squeeze spra y gun trigger to release pressure.
2. Detach water supply hose and high pressure hose.
Safety
Latch
STEP 5: Engage
the spray gun saf ety
lock.
3. Turn on the machine for a few seconds, until remaining water exits. Turn off immediately .
4. Do not allow high pressure hose to become kinked.
5. Store the machine and accessories in a room which
does not reach freezing temperatures.
CAUTION: Failure to follo w the above directions will
result in damage to your pressure washer.
16
97-610, 97-6152 • REV. 4/04
Page 17
BASIC FACTS
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PRESSURE EQUIVALENTS
Simply stated, pressure is the force ex erted by a gas or liquid attempting to escape from a container. It is useful
to know how strong this “attempt to escape” is. Pressure can be measured with a manometer or with a pressure
gauge. At the lower lev els, it is e xpressed in “water column inches” i.e . 11 w .c.i. Higher pressures are expressed
in terms of the force ex erted against a square inch of area, for example, 125 lbs. per square inch (125 psi).
No main powerRestore power.
Faulty limit switchTest/replace.
Faulty wiringTest wiring.
No gas supplied to pilot valveCheck for availability of gas.
Manual valves in "OFF" posi tionTurn manual valve and ga s cock to full " ON". Check pilot key
Faulty pilot valveTest gas valve.
Faulty wiringTest wiring.
Restricted p ilot line or clogged pilot orificeClean pilot tubing and orifices.
Broken or shorted electr od e ass emblyTest/replace.
Faulty wiringTest wiring.
Low pilot flameCheck inlet pressure, pilot oriface.
Improper alig nment o f sensor in p i lot flameAdjust align ment - see figure 6, pag e 15.
Faulty main gas operator in gas controlTest gas valve - repair/replace.
Faulty flame sensorTest sensor, wiring - repair /rep lace.
Faulty pilot valveTest gas valve.
Faulty wiringTest wiring.
Low pilot flameCheck inlet pressure, pilot oriface.
Improper alig nment o f sensor in p i lot flameAdjust align ment - see figure 6, pa ge 1 5.
Faulty main gas operator in gas cont rolTest ga s valve - repair/r epl ace.
Faulty flame sensorTest sensor, wiring - repair /rep lace.
Faulty pressure gaugeInstall new gau ge.
Insufficient water suppl yUse larger garden hose. Clean filter washer at water inl e t.
Old, worn or incorrect s pr ay nozzl eMatch nozzle number to machine a nd/ or r ep l ace w i th new
Belt slippageTighten or replace. Use correct belt.
Plumbing or hose lea kCheck plumbing system for leaks. Retape leaks with tef lon
Faulty or misadjusted u nloader valve (where
applicable)
Worn packing in pumpInstall new packing kit.
Fouled or dirty inlet or discharge valves in
pump
Worn inlet or dischar ge valvesReplace with valve kit.
Obstructio n in spr ay nozzleRemove obstruction.
Leaking pressur e contr ol valve (where
applicable)
Detergent meter i ng valve lef t open sucking air
or faulty metering valve
Slow motor RP MCh e ck i n comin g voltag e.
Improper size of gas li nesSee page 8 for sizing of gas l ines.
Low gas pressureIncrease gas p ress ur e to machine.
Improper pressure re gula torSpecify BTU, building gas pressur e 11 w.c.i. to machine for
Low gas pressureIncrease gas p ress ur e as describe d on page 10.
Soot buildup on coi l s no t allowing heat
transfer
Improper burner no zzle
adjustment.
nozzle.
tape.
Adjust unloader for prope r pres sur e. Install repai r kit whe n
Each machine is equipped with one or more spray
nozzles, depending on the model. Different spray
nozzles are calibrated for each machine, depending on
the flow and pressure of that particular model. Spray
nozzles vary in bore size and angle of spray. Popular
spray angles are 0°, 15°, 25°, 40°. When ordering, please
specify size and angle of nozzle. Nozzle size for each
machine is located on the serial plate.
Unloader V alves:
Unloader valves relie ve pressure in the line when a spray
gun is closed. Unloader v alves are preset and tested at
the factory before shipping. Occasional adjustment of
the unloader may be necessary to maintain correct pressure. For valv e adjustment contact y our nearest dealer
or call technical support.
Winterizing Procedure:
Damage due to freezing is not covered by warranty.
Adhere to the following cold weather procedures whenever the washer must be stored or operated outdoors
under freezing conditions.
PRESSURE WASHER Troubleshooting Guide
It is necessary to protect your machine against freezing when temperatures drop below 32° F. Siphoning a
small amount of antifreeze into the system is recommended. This is done by pour ing a 50-50 mix of antifreeze and water into the float tank and then siphoning
100% antifreeze through the detergent line with the
pump on. If compressed air is available, an air fitting
can be screwed into the float tank strainer fitting, and
by injecting compressed air , all w ater will be blo wn out
of the system. The use of a draft diver ter will prevent
the wind chill factor from freezing the coil.
Low Pressure Diagnosis:
(Machines with spray gun)
Refer to Troubleshooting Chart for low pressure. If the
trouble is found to be either the unloader or the pump ,
your next step is to determine which is the problem.
This can be done by eliminating the unloader from the
system and attaching the 50' discharge hose directly to
the pump. If high pressure is dev eloped in this manner ,
the pump is good and the unloader needs to be repaired
or replaced. If low pressure is still present, then the pump
needs repairing.
CAUTION: When using this procedure to test components keep the spray gun open at all times.
High Limit Hot Water Thermostat:
For safety, each machine is equipped with an adjustable thermostat. In the e vent the temperature of the w ater should exceed its operating temperature, the thermostat will turn the burner off until the water cools.
20
97-610, 97-6152 • REV. 4/04
Pumps:
Use only SAE30 weight non-detergent oil. Change oil
after first 50 hours of use. Thereafter , change oil e v ery
three months or at 500 hour intervals. Oil level should
be checked through use of the dipstic k found on the top
of the pump or by the red dot visible through the oil
gauge window . Oil should be maintained at that level.
HEATING COILS
To Check Water Heater Coil for Leaks:
With the main burners "OFF" start the pumping unit and
allow it to run for a few minutes. With a drop light or
flashlight, check the burner compartment. If no leaks
are visible and water is dripping from the coils, then it is
condensation from the flue gases when the burners are
on.
Condensation from Heating Coil:
When cold water is being pumped into the water heater
coils and the burners are on, condensation will form on
the coils and drip down into the burner compartment.
This will give the appearance of a leaking coil, particularly on cold humid days.
Deliming Coils:
In alkaline water areas, lime deposits can accumulate
rapidly inside the coil pipes. This gro wth is increased by
the extreme heat build up in the coil. The best prevention for liming conditions is to use high quality cleaning
detergents. In areas where alkaline water is an extreme
problem, periodic use of Manufacturers Deliming P o wder (part #9-028008) will remove lime and other deposits before coil becomes plugged. (See following Instructions for use of Deliming P o wder .)
Periodic flushing of coils is recommended.
1. Fill a container with 4 gallons of water, then add 1
lb. of deliming po wder. Mix thoroughly .
2. Remove nozzle from spray gun assembly and put
spray gun into container. Secure the trigger on the
spray gun into the open position.
3. Attach a short section (3-5 ft.) of garden hose to
machine to siphon solution from an elevated container, or add mixture to the float tank. Tur n pump
switch on allowing solution to be pumped through
coils and back into the container. Solution should
be allowed to circulate 2-4 hours.
4. After circulating solution, flush entire system with
fresh water. Reinstall w and assembly to spray gun.
Page 21
MAINTENANCE & SERVICE
PRESSURE WASHER Troubleshooting Guide
Gas Valve Regulator Adjustment:
(See Fig. 5)
Adjustment of the built-in regulator isn’t normally necessary, since it is preset at the factory. However, field
adjustment may be accomplished as follo ws:
1. Attach manometer at both inlet and outlet pressure
ports.
2. Remove manifold pressure adjustment scre w cap .
3. With small screwdriver, rotate manifold pressure adjustment screw clockwise to increase or counterclockwise to decrease gas pressure.
4. Replace manifold pressure adjustment screw cap .
Figure 5
Control
Knob
Inlet
View
Pressure
Inlet
Port
Line to
Pilot Light
Outlet
Pressure
Pilot Key
Adjustment
Gas Valve Adjustment
Manifold Pressure
Adjustment Screw
Under Cap
Outlet
View
Port
Pilot Burner Adjustment:
1. Remove pilot adjustment cap.
2. Adjust pilot key to provide properly sized flame.
3. Replace pilot adjustment cap.
Rupture Disk:
If pressure from pump or if thermal expansion should
exceed safe limits, the rupture disk will burst, allowing
high pressure to be discharged through hose to ground.
When the disk ruptures, it will need to be replaced.
Torque to 35 ft. lbs.
PROPANE GAS (Vapor Fuel Only)
General Safety Precautions:
Have a qualified gas service person assist in any gas
burner installation or service. Fe w maintenance people
or mechanics are knowledgeable in gas controls or related safety practices. Since propane gas is heavier than
air, unb urned propane gas will gravitate to the floor rather
than rise out of the stack. Hence , adequate floor space
and good ventilation are especially important with propane systems.
Gas Pressure Requirements:
All propane fired machines operate on gas phase only .
They are designed to operate at a pressure of 11 w .c.i.
(between 1/3 and 1/2 of one PSI), and are often operated at even higher pressures when extra heat is
needed.
Exterior regulators are needed to control the system.
Propane bottles are not included with the machine. A
high pressure regulator should be installed on the propane bottle and a low pressure regulator attached to
the pressure washer.
Propane Cylinder Capacity:
An important consideration with propane systems is the
capacity of the supply cylinder relative to the needs of
the burner. The burner operates on propane as a gas.
As gas is used from the propane cylinder, the liquid in
the cylinder boils to maintain gas pressure. This boiling
process cools the liquid, and in a heavy, continuousdemand situation, the liquid temperature can fall to the
point at which it cannot provide gas as rapidly as is
needed. In this case , it may be necessary to warm the
propane cylinder by directing a warm spray, not over
120°, on the cold cylinder, or by manifolding two propane bottles together to increase total vaporization capacity. It is recommended that a minimum 100 lb. propane bottle be used on the machine, depending on the
length of running time desired.
BURNER FEATURES
Operated Automatic Valve:
This machine is equipped with a thermopile self-powered combination gas control. This system is designed
as a constant burning pilot. Lighting of the pilot is accomplished by manually lighting the pilot. A thermostat
and flow switch control the main solenoid v alv e.
Care of Main Burner:
Because of condensation from the heater coils dripping
down on the burners, scale buildup may occur in the
burner jet orifices.
1. TO REMOVE BURNER MANIFOLD FROM
WATER HEATER COIL:
Tur n off the gas at the main burner by tur ning the
knob to the “OFF” position on the gas valve and
main gas supply.
21
97-610, 97-6152 • REV. 4/04
Page 22
MAINTENANCE & SERVICE
Disconnect the pilot and ignition lines from the gas
valve. Disconnect union in main burner line. (Remove the nuts from the U-bolts, item 21 on page
24). Slide b urner manifold out through shell open-
ing.
2. TO CLEAN B URNER JETS:
Select proper size drill for type of gas inv olved. Use
vise to hold drill and to ream out each jet orifice.
If the water heater will be exposed to freezing weather ,
an antifreeze solution should be circulated through the
coils by whatever means are a vailable f or the particular
system the water heater is used on.
BURNER TROUBLESHOO TING
Millivolt System Check:
This machine has a thermopile self-powered combination gas control. Before checking the millivolt system,
the following operations should be performed and observations made:
1. Inspect system for proper wiring.
PRESSURE WASHER Troubleshooting Guide
2. The switch leads and all wire connections should
be cleaned and tightened to eliminate all unnecessary resistance.
3. Clean and/or adjust pilot for maximum flame impingement on the thermopile.
4. If pilot will not remain lit when gas cock dial is released, check automatic pilot (Step D).
TERM
TH
TH
TP
TERM
The millivolt system and individual components may be
checked with a DC milliv olt meter having a 0-1000 MV
range. Conduct each check as shown in the chart below by connecting the meter test leads to terminals as
indicated. All readings are closed circuit.
A. Complete Millivolt System Chec k
(“A” Reading = Switch contacts CLOSED - Gas
Cock Dial “ON” - Main burner should come ON).
1. If the reading is more than 100 millivolts and the
automatic valve still does not come on, replace
the automatic valve operator.
2. If the closed circuit reading (“A” Reading) is less
than 100 millivolts, determine cause for low reading - proceed as follows:
B. Thermopile Output Reading Check
(“B” Reading = Switch contacts OPEN - Main burner
OFF).
If the minimum 250 millivolt reading is not obtainable, readjust pilot for maximum milliv olt output. If millivolt reading is still below minimum
specified, replace thermopile.
2 Lead Thermopile
Equivalent
To (CP-2)
To Burner
Flow Switch
Igniter
Pilot 2CH-2
or
Equivalent
22
MILLIVOLT
Check
Test
A
B
C
D
TERMINAL
Complete
Thermopile
Resistance
Auto/Pilot
OPERATOR
PANEL
To Test
System
Output
System
Dropout
TP
Connect
Meter
Leads To
Terminals
2 & 3Cl osed
1 & 2Open
1 & 3Closed
1 & 2Open
Switch
Flow &
Burner
Contacts
TERM
Meter
Reading
Should
Be
100 MV or
More
Greater
than 250
Less than
35
Between
120 - 30
MV
97-610, 97-6152 • REV. 4/04
2 Lead
Thermopile
Connections
Gas
Valve
Page 23
MAINTENANCE & SERVICE
PRESSURE WASHER Troubleshooting Guide
C. System Resistance Check
(“C” Reading = Switch contacts CLOSED - Gas
Cock “ON” - Main burner should be ON)
If the “C” Reading is more than that specified
for the system being checked, this indicates the
resistance in the system is excessive and must
be reduced. To correct:
a. Clean and tighten switch leads and connec-
tions.
b. Shorten switch lead wires and/or replace
with heavier gauge wire.
c. Cycle switch r apidly to clean contacts .
D. Automatic Pilot Dropout Check
1. Hold gas cock dial depressed in pilot position
until maximum output is observed. Then extinguish pilot and observe meter.
2. Dropout of automatic pilot magnet (sound should
be audible) should occur between 120 millivolts
and 30 millivolts. If dropout occurs outside these
limits, change the automatic pilot magnet assembly.
23
97-610, 97-6152 • REV. 4/04
Page 24
PREVENTATIVE MAINTENANCE
This pressure washer was produced with the best availab le materials and quality craftsmanship. Howe ver , 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 TUFF, Inc.
dealer for maintenance. Regular prev entative maintenance will add many hours to the life of y our pressure washer .
Perf orm maintenance more often under severe conditions .
Hex1
42-00162Nipple, 3/4" x 3", Black Pipe3
52-00293Elbow, 3/4", Black, 90°4
62-00164Nipple, 3/4" x 6", Black Pipe1
72-00163Nipple, 3/4" x 2", Black1
82-0087Union, 3/4", Black Pipe1
92-00151Nipple, 3/4" x Close, Black2
Auto Start1
206-035210Relay, Socket, IDEC (Remote) 1
216-036210Relay, Latch, IDEC (Remote)1
2290-017Nut, 10/32", Keps13
2390-199940 Screw, 10/32" X 1/4"2
▲ Not Shown
OPERATOR’S MANUAL
41
97-610, 97-6152 • REV. 4/04
Page 42
Page 43
HNG SERIES PRESSURE WASHER
WARRANTY
SHARK LIMITED NEW PRODUCT WARRANTY
PRESSURE WASHERS
WHA T THIS WARRANTY COVERS
All SHARK PRESSURE WASHERS are warranted by SHARK to the original purchaser to be free from defects in materials and
workmanship under normal use, for the periods specified below . This Limited W arranty is subject to the e xclusions sho wn below ,
is calculated from the date of the original purchase, and applies to the original components only. Any parts replaced under this
warranty will assume the remainder of the part’s warranty period. This warranty applies to the original purchaser and is not
transferable.
LIMITED LIFETIME PARTS WARRANTY:
Components manufactured by SHARK, such as frames, handles, coil wraps, float tanks, and belt guards. Forged brass pump
manifold. All heating coils will have a three year w arranty. Internal components on the oil-end of all pressure washer pumps will
have a seven year warranty.
ONE YEAR PARTS WARRANTY:
All other components, excluding normal wear items as described below, will be warranted for one year on parts. Warranty on
these parts will be for one year regardless of the duration of the original component manufacturer’s part warranty.
WARRANTY PROVIDED BY OTHER MANUFACTURERS:
Motors, generators, and engines, which are warranted by their respective manu facturers, are serviced through these manufacturers’ local authorized service centers. SHARK cannot provide warranty on these items.
WHAT THIS WARRANTY DOES NOT COVER
This warranty does not cover the following items:
1. Nor mal wear items, such as nozzles, guns, discharge hoses, wands, quick couplers, seals, filters, gaskets, O-rings,
packings, pistons, pump valve assemblies, strainers, belts, brushes, rupture disks, fuses, pump protectors.
2. Damage or malfunctions resulting from accidents, abuse, modifications, alterations, incorrect installation, improper
servicing, failure to follow manufacturer’s maintenance instructions, or use of the equipment beyond its stated usage
specifications as contained in the operator’s manual.
3. Damage due to freezing, chemical deter ioration, scale buildup, rust, corrosion, or thermal expansion.
4. Damage to components from fluctuations in electr ical or water supply.
5. Nor mal maintenance ser vice, including adjustments, fuel system cleaning, and clearing of obstructions.
6. Transportation to service center, shop labor charges, field labor charges, or freight damage.
WHAT YOU MUST DO TO OBTAIN WARRANTY SERVICE
While not required for warranty service, we request that you register your SHARK pressure washer by returning the completed
registration card. In order to obtain warranty service on items, you must return the product to an Authorized SHARK Dealer,
freight prepaid, with proof of purchase, within the applicable warranty period. If the product is permanently installed, you must
notify your Authorized SHARK Dealer of the defect. The Authorized Dealer will file a claim, which must subsequently verify the
defect. In most cases, the part must be returned to SHARK freight prepaid with the claim. For warranty service on components
warranted by other manufacturers, the Authorized Dealer can help you obtain warranty service through these manufacturers’
local authorized service centers.
LIMIT A TION OF LIABILITY
SHARK’S liability for special, incidental, or consequential damages is expressly disclaimed. In no event shall SHARK’S liability
exceed the purchase price of the product in question. SHARK makes every effort to ensure that all illustrations and specifications are correct, however, these do not imply a warranty that the product is merchantable or fit for a particular purpose, or that
the product will actually conform to the illustrations and specifications. THE WARRANTY CONTAINED HEREIN IS IN LIEU OF
ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. SHARK does not authorize any other party , including authorized Dealers, to mak e any representation or
promise on behalf of SHARK, or to modify the terms, conditions, or limitations in any way. It is the buy er’s responsibility to ensure
that the installation and use of SHARK products conforms to local codes. While SHARK attempts to assure that its products
meet national codes, it cannot be responsible for how the customer chooses to use or install the product.