Wen PW21 User manual

Model # PW21
2030 PSI ELECTRIC
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Your new tool has been engineered and manufactured to WEN’s highest standards for dependability,
ease of operation, and operator safety. When properly cared for, this product will supply you years
of rugged, trouble-free performance. Pay close attention to the rules for safe operation, warnings,
and cautions. If you use your tool properly and for intended purpose, you will enjoy years of safe,
reliable service.
IMPORTANT:
NEED HELP? CONTACT US!
Have product questions? Need technical support?
Please feel free to contact us at:
800-232-1195
[email protected]
WENPRODUCTS.COM
(M-F 8AM-5PM CST)
PRESSURE WASHER
For replacement parts visit
WENPRODUCTS.COM
234350

TABLE OF CONTENTS
Technical Data 2
3
4
5
6
7
8
10
11
12
14
Important Safety Instructions
Specific Rules for Pressure Washers
Electrical Information
Get to Know Your Pressure Washer
Assembly
Operation
Maintenance & Storage
Troubleshooting
Exploded View and Parts List
Warranty Statement
TECHNICAL DATA
Model Number:
Motor:
Rated Pressure:
Max Pressure:
Max Flow Rate:
Rated Water Temperature:
Max Inlet Pressure:
Hose Length:
Power Cord Length:
Soap Tank Capacity:
Assembled Product Dimensions:
Weight:
PW21
120V, 60Hz, 14.5A
1450 PSI
2030 PSI
1.76 GPM
32° to 104° F
101 PSI
20 ft
36 ft
40.6 fl. oz. (0.32 gal)
15.4 x 13.9 x 35.5 in
28 lbs
2

IMPORTANT SAFETY INSTRUCTIONS
Safety is a combination of common sense, staying alert and knowing how your tool works.
SAVE THESE SAFETY INSTRUCTIONS.
WARNING: To avoid mistakes and serious injury, do not plug in your tool until the following steps
have been read and understood.
1. READ and become familiar with this entire instruction manual. LEARN the tool’s applications, limitations, and
possible hazards.
2. STAY ALERT. Watch what you are doing and use common sense when operating your tool.
3. DO NOT USE the tool while you are tired or under the influence of drugs, alcohol, or medication. A moment
of inattention during operation may result in serious bodily injury.
4. NEVER LEAVE YOUR UNIT RUNNING WHILE UNATTENDED. Unplug the unit before leaving for
extended periods of time.
5. DO NOT OVERREACH. Keep proper footing and balance at all times. This enables better control of the unit
in unexpected situations and will also prevent you from falling down and embarrassing yourself in front of your cool
neighbor Greg. Hold the handles firmly to avoid injury. When stepping backwards, be cautious about any obstacles
beneath your feet or behind you in order to avoid falling.
6. LEARN YOUR TOOL’S APPLICATIONS AND LIMITATIONS as well as the specific potential hazards
related to this machine. Do not use this machine for any purpose other than the one for which it was designed.
Otherwise, you may cause mechanical defaults, serious damage or personal injury.
7. PRELIMINARY UNIT INSPECTION: thoroughly inspect the unit before operation. Make sure all the parts
are secured and installed correctly. If you notice any abnormalities, do not use the machine until it has been prop-
erly repaired. Always perform a test run the first time you use the tool or after replacing parts to ensure that the unit
is functioning properly.
8. MALFUNCTIONING SWITCH: do not use the tool if the switch does not turn it on and off. Any electrical
appliance that cannot be controlled by the switch is not safe to use and must be repaired.
9. BEFORE SERVICING, cleaning or removing of any part, shut off power and relieve pressure.
3

WARNING: Risk of injection or injury to persons - do not direct discharge stream at persons or animals.
CAUTION: Misuse of this pressure washer can damage it and shorten its life. Only use the pressure washer for its
intended purposes.
1. INJECTION HAZARD: The high pressure stream of water can cut through skin and cause serious injury. Do
not point the gun at yourself or at any one else, including animals. In case of skin penetration, seek medical aid
immediately.
2. Hoses and tubes can become damaged from coming in contact with hot surfaces. Always double check the hose
for perforations or other defects before starting up the machine.
3. This system is capable of producing pressure up to 2030 PSI/14,000 kPa. To avoid rupture and injury, do not
operate this pump with components rated less than 2030 PSI/14,000 kPa working pressure (including but not
limited to spray guns, hoses and hose connections).
4. Kickback from operation can cause the user to fall down. Always operate the pressure washer on a level and non-
elevated surface to prevent the risk of falling.
5. Don’t pressure wash the pressure washer. Do not spray the power source or the outlet. Wear rubber-soled shoes
during operation.
6. Always wear safety goggles to protect from possible mishaps with the stream or detergents. Always be aware of the
dangers associated with the detergents and chemicals that you are working with.
7. Attach all hoses before starting the unit. Have damaged items repaired or replaced as necessary. Do not use plugs
or cords that show signs of damage such as broken or cracked insulation.
8. To reduce the risk of injury, close supervision is necessary when the pressure washer is used near children.
9. Know how to stop the water pressure quickly. Be thoroughly familiar with the controls.
10. Keep operating area clear of all persons and animals.
11. Do not overreach or stand on unstable support. Keep good footing and balance at all times.
12. Before servicing, cleaning, or removal of any part, shut off power and relieve pressure in the washer by squeezing
the trigger to empty the washer of any residual water.
13. This product is provided with a ground fault circuit interrupter built into the power cord plug. If replacement of
the plug or cord is needed, use only identical replacement parts.
14. WARNING: Do not connect to potable water system.
15. WARNING: If connection is made to a potable water system, the system MUST be protected against backflow.
Safety is a combination of common sense, staying alert and knowing how your tool works.
SAVE THESE SAFETY INSTRUCTIONS.
SPECIFIC RULES FOR PRESSURE WASHERS
4

2. Make sure your extension cord is properly wired and in good condition. Always replace a damaged extension
cord or have it repaired by a qualified person before using it. Protect your extension cords from sharp objects, ex-
cessive heat and damp/wet areas.
3. Use a separate electrical circuit for your tools. This circuit must not be less than a #12 wire and should be protect-
ed with a 15 A time-delayed fuse. Before connecting the motor to the power line, make sure the switch is in the OFF
position and the electric current is properly rated for this item. Running at a lower voltage will damage the motor.
4. Do not abuse extension cord and do not yank on any cord to disconnect. Always disconnect the extension cord
from the receptacle before disconnecting the product from the extension cord.
GROUND FAULT CIRCUIT INTERRUPTER PROTECTION (GFCI)
This pressure washer is provided with a ground-fault circuit-interrupter (GFCI) built into the plug of the power-
supply cord. This device provides additional protection from the risk of electric shock. Should replacement of the
plug or cord become necessary, use only identical replacement parts that include GFCI protection.
SERVICING OF A DOUBLE-INSULATED APPLIANCE
In a double-insulated product, two systems of insulation are provided instead of grounding. No grounding means
is provided on a double-insulated product, nor should a means for grounding be added to the product. Servicing a
double-insulated product requires extreme care and knowledge of the system, and should be done only by qualified
service personnel. Replacement parts for a double-insulated product must be identical to the parts they replace. A
double-insulated product is marked with the words “DOUBLE INSULATION” or “DOUBLE INSULATED.”
The symbol (right) may also be marked on the product.
WARNING: DO NOT MODIFY THE PLUG PROVIDED. If it will not fit the outlet, have the proper
outlet installed by a licensed electrician.
EXTENSION CORDS
WARNING: Do not immerse the pressure washer in water. Do not expose power plug or outlet to rain
or water. Only use with an extension cord suitable for outdoors.
NOTE: Because the electric pressure washer already includes a 36 foot power cord, we do not recommend using
any additional extension cord longer than 25 feet.
Extension Cord Recommendations
Cord Length 25 ft.
Wire Gauge 14 gauge
ELECTRICAL INFORMATION
1. When using an extension cord, be sure to use one heavy enough to
carry the current your product will draw. An undersized cord will cause
a drop in line voltage resulting in loss of power and overheating. The ta-
ble to the right shows the correct size to be used according to cord length
and nameplate ampere rating. When in doubt, use a heavier cord. The
smaller the gauge number, the heavier the cord.
5

GET TO KNOW YOUR PRESSURE WASHER
Use the illustrations below to become familiar with the locations and functions of the various components and
controls of this electric pressure washer.
1.
2.
3.
4.
5.
6.
7.
8.
Trigger Gun
Trigger with Safety Lock
High Pressure Hose Connector
Gun Holder
Spray Lance
Quick-Connect Collar
Gun Stock
Handle
1
2
8
3
9
4
10
5
11
6
12 15
7
13
16
14
9.
10.
11.
12.
13.
14.
15.
16.
Hose Reel
High Pressure Hose
High Pressure Hose Coupler
ON/OFF Switch
Detergent Adjustment Switch
Water Inlet Adapter
Nozzles (0°, 15°, 25°, 40°, Soap Nozzle)
Onboard Detergent Tank
6

ASSEMBLING THE PRESSURE WASHER
1. Slide the gun holder into position and snap it in place (Fig. 1).
2. Slide the gun stock in place and tighten it with the 4.8 mm x 12 mm screw using
a Phillips screwdriver (Fig. 2).
3. Install the water inlet adapter to the water inlet by rotating the silver inner collar
clockwise until it is securely tightened (Fig. 3).
4. Fit the spray lance into the trigger gun and rotate it until the two parts are se-
curely connected (Fig. 4).
5. Attach the high pressure hose coupler to the hose connector on the trigger
gun by pressing the coupling stogether and rotating the sleeve until the two are
securely mated (Fig. 5).
CONNECTING WATER SUPPLY HOSE TO THE PRESSURE WASH-
ER
1. Inspect the inlet screen on the water inlet adapter and remove any debris.
2. Turn on the water, allowing it to run through the hose for a few seconds to flush
out any debris.
WARNING: The intake water temperature must not exceed 104°F
(40°C). The water supply must not exceed 101 PSI (700 kPa).
CAUTION: Only use clean water for the pressure washer. Use of unfiltered
water containing corrosive chemicals will damage the unit.
3. Turn off the water. Connect the water supply hose to the orange part of the
water inlet adapter and tighten by hand.
NOTE: There must be a minimum of 10 feet of unrestricted hose between pres-
sure washer and the water faucet or shut off valve.
ASSEMBLY
WARNING: Do not attempt to assemble or operate this pressure washer until you have read and understood this
entire manual. If you have any problems assembling or operating this unit, please call [phone] M-F 8-5 CST
for customer service or email us at [email protected].
7
PACKING LIST
• Pressure Washer Body
• Trigger Gun
• Spray Lance
• Gun Holder
• Gun Stock
• Screw 4.8 mm x 12 mm
• Water Inlet Connector
• Nozzles (0°, 15°, 25°, 40° and soap nozzle)
• Nozzle Cleaner
• Operator’s Manual
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Spray Lance

WARNING: Never make changes to the nozzle while the trigger is engaged. Doing so could result in
serious injury or damage to the pressure washer.
WARNING: Use extreme caution when pressure washing. Do not pressure wash when people or ani-
mals are around. Do not point the spray gun at others, as serious injury or even death could occur.
INSTALLING THE SPRAY NOZZLE
WARNING: Always turn off the pressure washer and engage the safety lock on the trigger gun before
connecting and disconnecting spray nozzles to avoid injuries from accidental startups.
This electric pressure washer is equipped with five quick-connect nozzles. Determine the spray nozzle that best suits
your cleaning task. Test a small area first to avoid surface damage.
• 40° nozzle (gray) - for gentle cleaning on cars, trucks, boats, patio furniture, or lawn equipment.
• 25˚ nozzle (green) - for general cleaning on home siding, brick patios, wood decks, driveways, or sidewalks.
• 15˚ nozzle (yellow) - for tough jobs like stripping paint, removing oil stains, grease or rust.
• 0˚ nozzle (red) - for powerful spot cleaning or hard-to-reach areas. Use extreme caution when using this nozzle!
• Soap nozzle (black) - for detergent application.
1. Make sure the pressure washer is turned off and the water supply is shut off.
OPERATION
8
USING THE SPRAY GUN
1. To apply safety, flip open the safety lock behind the trigger until it clicks into the slot (Fig. 6). To release safety,
return the safety lock until it snaps onto the trigger.
2. Pull back the trigger to begin operating the pressure washer. Release trigger to stop the water flow.
Fig. 6
Fig. 7
Trigger
Quick-Connect
Collar
Safety Lock
2. Pull the trigger to release any pre-existing water pressure in the machine.
3. Engage the gun safety lock by flipping it open until it clicks into the slot (Fig. 6).
4. To connect the nozzle, snap the desired nozzle onto the quick-connect collar until it
clicks into place (Fig. 7).
5. To disconnect the nozzle, place one hand over the nozzle and use the other hand to pull back on the quick-
connect collar. CAUTION: the nozzle may spring out when the collar is pulled back.

5. Attach the desired nozzle onto the spray lance (see “Using Spray Nozzle”).
6. Point the gun at a safe direction, aimed away from any bystanders or ani-
mals. Turn the power switch to ON and pull the trigger to begin pressure
washing (Fig. 8).
IMPORTANT:
The pressure washer is equipped with a Total Stop System (TSS) that senses
water flow in the pump. When the trigger is released and no water is flowing
through the pump, the motor will automatically shut off to protect the pump
from overheating, thus saving energy and prolonging pump life. When the pow-
er switch is in the ON position, engage the trigger to start the pump.
WARNING: Beware of kickback when pressing the trigger!
OPERATION
9
USING PRESSURE WASHER DETERGENT
1. The onboard detergent tank is located on the back of the pressure washer. Open the rubber cap and fill the res-
ervoir with your preferred pressure washer detergent. The soap tank capacity is 40.6 fl. oz. (0.32 gallons).
CAUTION: Use only detergents designed for pressure washers. Use of other detergents or solvents could damage
the pressure washer. Follow the instructions included with your detergent about how it should be prepared and
used.
PREPARING AND RUNNING THE PRESSURE WASHER
1. Make sure that the washer is standing on a secure, stable surface to prevent it from tipping during operation.
2. Check that all connections are secure:
• The water supply hose is properly fastened to the pressure washer’s water inlet adapter.
• The high pressure hose is properly fastened to the hose connector on the trigger gun.
• The spray lance is properly attached to the trigger gun.
3. Turn on the water to its maximum flow.
4. Release the trigger safety lock and pull the trigger for a few seconds until water flow is steady. This will allow air
to escape and discharge any pre-existing pressure from the gun and the hose. Then turn off the water.
Fig. 8
Fig. 9
2. Only use the black soap nozzle when applying detergent.
3. Control the amount of soap dispensed by turning the detergent adjustment
switch (Fig. 9).
4. To drain detergent from the unit, take out the detergent tank and dump the
contents out. Afterwards, spray the gun to flush out all of the soap remaining
in the unit.
THERMAL SENSOR
The pressure washer is equipped with a thermal sensor that protects the motor from overloading. When overload-
ed, the machine will shut down and restart after a few minutes once the motor has cooled down.

5. Disconnect the water hose. WARNING: Only disconnect the high-pressure hose from the trigger gun or the
pressure washer when there is no pressure in the system.
6. Engage the gun safety lock before storing the pressure washer.
MAINTENANCE & STORAGE
NOTE: Replacement parts for your pressure washer can be ordered at WENproducts.com. Use only identical
replacement parts.
HIGH PRESSURE HOSE
The high pressure hose can be easily damaged and should be stored carefully. Do not kink the hose. Do not drive
vehicles over the hose. Do not expose the hose to sharp objects. Inspect hose for cuts, bulges, or leaks which can
develop from kinking or wear. If damage is found, replace the hose immediately.
WARNING: If the hose is damaged, do not use the unit or try to repair the hose. Always replace with an
identical part before operation.
SPRAY NOZZLES
Regularly clean the nozzles, preferably after every use, to prevent nozzles
from clogging and ensure good performance of the machine.
1. Release the trigger, shut off the unit, unplug the power plug and turn off
the water.
2. Remove the nozzle from the spray lance. CAUTION: the nozzle may
spring out when released from the lance.
3. Use the nozzle cleaner or a small paper clip to dislodge any foreign
materials that are clogging or restricting the spray tip (Fig. 11). Flush water
through the back end of the nozzle and spray wand with your garden hose
for 30-60 seconds to remove any debris.
Nozzle Cleaner
WARNING: Risk of electric shock. Always switch off the pressure washer, disconnect the power plug
and turn off the water before performing any maintenance.
10
SHUTTING DOWN THE UNIT
1. Turn the power switch to the OFF position (Fig 10).
2. Unplug the power plug from the outlet.
3. Turn off the water source.
4. Pull the trigger to relieve all the built-up pressure in the pressure washer.
OPERATION
Fig. 10
Fig. 11
WATER INLET ADAPTER
Routinely check and clean the water inlet adapter. Remove the water inlet adapter and rinse with warm water to