LANDA ENG5-3000 Hot Water Electric Powered Natural Gas or LP Heated User Manual

ENG5-3000 Hot Water Electric Powered Natural Gas or LP Heated

Operator’s Manual

Hot Water – Electric Powered – Natural Gas or LP Heated

MODELS: ENG4-2000, ENG4-2200, ENG4-3000, ENG5-2300, ENG5-3000, ENG6-3200, ENG8-3200, ENG10-3000

For the Landa Dealer nearest you, consult our web page at
www.landa.com

Machine Data Label

Identification of Operational Label Symbols

How To Use This Manual

This manual contains the following sections:

• How to Use This Manual
• Safety
• Operations
• Maintenance

The HOW TO USE THIS MANUAL section will tell you how to find important information for ordering correct repair parts.

Parts may be ordered from authorized dealers. When placing an order for parts, the machine model and machine serial number are important. Refer to the MACHINE DATA box which is filled out during the installation of your machine. The MACHINE DATA box is located on the inside of the front cover of this manual.

The model and serial number of your machine are located on the back of the machine.

The SAFETY section contains important information regarding hazardous or unsafe practices of the machine. Levels of hazards are identified that could result in product damage, personal injury, or severe injury resulting in death.

The OPERATIONS section is to familiarize the operator with the operation and function of the machine.

The MAINTENANCE section contains preventive main-tenance to keep the machine and its components in good working condition. They are listed in this general order:

• Maintenance And Service
• Spray Nozzles
• Unloader Valves
• Winterizing Procedure
• Low Pressure Diagnosis
• High Limit Hot Water Thermostat
• Pumps
• Heating Coils
• Pressure Relief Valve
• Propane Gas
• Burner Features
• Basic Facts
• Pressure Equivalents
• Oil Change Record
• Troubleshooting

NOTE: The manual part number is located on the lower right corner of the front cover.

Safety

Introduction & Safety Information

Thank you for purchasing this Pressure Washer.
We reserve the right to make changes at any time without incurring any obligation.

Owner/User Responsibility:
The owner and/or user must have an understanding of the manufacturer’s operating instructions and warnings before using this pressure washer. Warning information should be emphasized and understood. If the operator is not fluent in English, the manufacturer’s instructions and warnings shall be read to and discussed with the operator in the operator’s native language by the purchaser/owner, making sure that the operator comprehends its contents.
Owner and/or user must study and maintain for future reference the manufacturers’ instructions.

The operator must know how to stop the machine quickly and understand the operation of all controls. Never permit anyone to operate the engine without proper instructions.

SAVE THESE INSTRUCTIONS

This manual should be considered a permanent part of the machine and should remain with it if machine is resold.
When ordering parts, please specify model and serial number. Use only identical replacement parts.

This machine is to be used only by trained opera-tors.

Important Safety Information

WARNING: If you do not follow these instructions exactly, a fire or explosion may result, causing property damage, personal injury or loss of life.

WARNING: To reduce the risk of injury, read operating instructions carefully before using.

1. Read the owner’s manual thoroughly. Failure to follow instructions and warnings could cause malfunction of the machine and result in death, serious bodily injury and/or property damage.

2. Know how to stop the machine and bleed pressure quickly. Be thoroughly familiar with the controls.
3. Stay alert — watch what you are doing.
4. Use only your hand to push in or turn the gas control knob. Never use a tool. If the knob will not push in or turn by hand, don’t try to repair it; call a qualified service technician.
5. All installations must comply with local codes. Contact your electrician, plumber, utility company or the selling dealer for specific details.

DANGER: Improper connection of the equipment-grounding conductor can result in a risk of electro-cution. Check with a qualified electrician or service personnel if you are in doubt as to whether the outlet is properly grounded.

DANGER: Keep wand, hose, and water spray away from electric wiring or fatal electric shock may result.

6. To protect the operator from electrical shock, the machine must be electrically grounded. It is the responsibility of the owner to connect this machine to a grounded receptacle of proper voltage and amperage ratings. Do not spray water on or near electrical components. Do not touch machine with wet hands or while standing in water. Always disconnect power before servicing.

WARNING: Flammable liquids can create fumes which can ignite, causing property damage or severe injury.

WARNING: Risk of explosion — Operate only where open flame or torch is permitted. Do not spray flammable liquids.

WARNING: Risk of fire — Do not change LP tanks when the product is operating or still hot.

WARNING: Use vapor fuel only.
7. Gas appliances shall be installed only in locations where combustible dusts and flammable gases or vapors are not present. Do not store or use flammable materials near this machine.

WARNING: In the event of a pilot outage, wait at least five minutes to clear out any gas before relighting.

8. Keep operating area clear of all persons.

WARNING: High pressure spray can cause paint chips or other particles to become airborne and fly at high speeds. To avoid personal injury, eye, hand and foot safety devices must be worn.

9. Always wear properly rated eye protection such as safety goggles or face shield while spraying.
(Safety glasses do not provide full protection)

WARNING : Risk of injury. Hot surfaces can cause burns. Use only designated gripping areas of spray gun and wand. Do not place hands or feet on non-insulated areas of the presasure washer.

10. To reduce risk of injury, close supervision is necessary when a machine is used near children. Do not allow children to operate pressure washer. This machine must be attended during operation.

WARNING: Grip cleaning wand securely with both hands before starting. Failure to do this could result in injury from a whipping wand.

11. Never make adjustments on machine while in operation.
12. Be certain all quick coupler fittings are secured before using pressure washer.

WARNING : High pressure developed by these machines will cause personal injury or equipment damage. Keep clear of nozzle. Use caution when oper-ating. Do not direct discharge stream at people or animals, or severe injury or death will result.

WARNING : Protect machine from freezing.

13. To keep machine in best operating conditions, it is important you protect machine from freezing. Failure to protect machine from freezing could cause malfunction of the machine and result in death, serious bodily injury, and/or property damage. Follow storage instructions specified in this manual.

DANGER : Risk of asphyxiation. Use this product only in a well ventilated area.

14. Avoid installing machines in small areas or near exhaust fans. Adequate oxygen is needed for combustion or dangerous carbon monoxide will result.

15. Manufacturer will not be liable for any changes made to our standard machines or any compo-nents not purchased from us.
16. The best insurance against an accident is precau-tion and knowledge of the machine.

WARNING: Be extremely careful when using a ladder, scaffolding or any other relatively unstable location. The cleaning area should have adequate slopes and drainage to reduce the possibility of a fall due to slippery surfaces.

17. Do not overreach or stand on unstable support. Keep good footing and balance at all times.
18. Do not operate this machine when fatigued or under the influence of alcohol, prescription medica-tions, or drugs.
19. Follow the maintenance instructions specified in the manual.
20. The LP models are designed to run on vapor propane fuel. Do not use liquid fuel. Have a qualified serviceman install and service your equip-ment.
21. Never expose a spark or flame where there may be unburned gas present.
22. Install this machine about 2 feet from wall to provide adequate ventilation and servicing space. This equipment incorporates parts such as snap switches or similar parts that tend to produce arcs or sparks. Therefore, when located in a garage, it should be in a room or enclosure provided for the purpose or should be installed 18″ (457mm) or more above the floor.

WARNING : To reduce the risk of electric shock, disconnect all electrical connections and shut-off gas valve before servicing.

23. Install this machine on non combustible flooring.
24. Exhaust gases should not be vented into a wall, a ceiling or a concealed space of a building. A draft diverter must be installed to prevent down draft and to allow cooling of exhaust temperatures. Down draft diverters shall be installed in the vents and located at a distance from the pressure washer stack to achieve maximum draft of 36″ minimum. Exhaust gases that exceed 470°F (243°C) are not suitable for connection to Type B gas vents.

Example of Down Draft Diverter for Gas Fired Machines

WARNING : Do not spray machine or any people, animals or elec-trical parts.

Follow the maintenance instructions specified in the manual.

Propane Tank Safety Instructions

CAUTION: Only qualified persons should fill your LP-gas containers.

1. Never allow your LP-gas container to be filled above the maximum safe level as indicated by a scale or the fixed liquid level gauge (outage). Do not use the visible gauge for filling.
2. Do not use a wrench or pliers to close the service valve or fixed liquid level gauge. These valves are designed to be closed leak-tight by hand or screw-driver as appropriate. If wrenches are necessary to stop a leak, the valve needs repair or replacement.
3. When tightening the POL Nut (left hand thread) on the service valve, draw it up snug with a proper wrench. This is a machined male brass fitting which seats securely against a female seat in the POL valve – no pipe dope is necessary. Acme/Type 1 valves have right handed threads which are secure when hand tight, and on the Quick Discon-nect/Type 2 Valves, the male connection is inserted into the female connection on the cylinder valve. (No wrenches required for both the Acme and the Quick Disconnect.)
4. When using container, slowly open service valve all the way. Listen to the regulator. A continuous hiss may indicate a leak or an open valve on an appliance.
5. Check all tank and the line connections periodically to be sure they are tight. When testing for leaks, use approved leak detector solution – not matches.
6. Make certain your container is properly fastened in place.
7. Turn container with open part of container guard towards frame. This protects valves and regulator against flying rocks and mud. Transport container in the proper position in which it is used, with the valves closed and POL Plugs inserted for POL Valves or Dust Caps for Acme Valves. Secure the tank against falling or rolling.
8. Check for leaks after connecting. Apply approved leak detector solution to connection, turn off all burners and pilots, and open service valve. Leaks will be detected by the growth of the bubbles. If bubbles grow, tighten or repair the connection as needed. Repeat leak test until problem is corrected.

9. LP-gas is normally non-corrosive – you need not worry about the inside of your container. However, the outside should be kept free from rust by a periodic coat of paint in a light reflective color. It is very important to inspect and maintain the bottom and foot ring on the container.
10. Do not store LP-gas containers indoors or in enclosed areas. Do not expose LP-gas container to heat. Always store with service valve closed and plugged as required.
11. Do not attempt to repair any containers, container valves, regulator or appliances by yourself. Use only trained certified LP-gas service personnel to perform repairs.

Install optional LP gas regulator assembly, item 9.802-633.0 or obtain a proper size regulator.

Operations

Component Identification – All Models

Pump — Delivers a specific gpm to the high pressure nozzle which develops pressure. (Not Shown)
Spray Gun — Controls the application of water and detergent onto cleaning surface with trigger device. Includes safety latch.
Detergent Valve— Allows you to siphon and mix detergents.
Wand — Must be connected to the spray gun.
High Pressure Hose — Connect one end to water pump high pressure discharge nipple and the other end to spray gun.

Rupture Disk — Secondary pressure release in the unlikely event the unloader valve fails. (Not Shown)
Unloader Valve — Safety device which, when the spray gun closes, prevents over pressurization. (Not Shown)

NOTE: If trigger on spray gun is released for more than 3 minutes, water will leak from the pump protector. Warm water will discharge from pump protector onto floor. This system prevents internal pump damage.

Installation Eng 4-2000, 4-2200, 4-3000, 5-2300, 5-3000

Installation Eng 6-3200, 8-3200, 10-3000

Installation

Place machine in a convenient location providing ample support, drainage and room for maintenance.

Location

The location should protect 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 tempera-tures, rain, etc. The machine should be located considering accessibility for the replacing of components and the refilling of detergents, adjust-ments and maintenance. Normal precautions should be taken by the operator of the machine to prevent excess moisture from reaching the machine.
2. It is recommended that a partition be made between the wash area and machine to prevent 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 life and may cause electrical shorts.
3. During installation of the machine, beware of poorly ventilated locations or areas where exhaust fans may cause an insufficient supply of oxygen. Sufficient combustion can only be obtained when there is a sufficient supply of oxygen available for the amount of fuel being burned. If it is necessary to install a machine in a poorly ventilated area, outside fresh air may have 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. Keep all flammable material at least 20 feet away. Allow enough space for servicing the machine. Local code will require certain distances from floor and walls. (Two feet away should be adequate).

WARNING: Avoid small areas or near exhaust fans.
AVERTISSEMENT: Éviter les petites superficies ou les surfaces à proximité des ventilateurs d’extraction.

Gas Codes
Confer with local gas company and with proper municipal officials regarding any specific code or regu-lations governing the installation. The installation must conform to local codes (NFPA 54).

Electrical
The machine, when installed, must be electrically grounded in accordance to local codes. Check for proper power supply using a volt meter; check the serial plate for the correct requirements.

Gas Piping
This machine shall be rigidly connected to the gas piping outlet and equipped with external manual shut-off valves adjacent to such machine. All gas piping shall be approved and installed in accordance with the Uniform

Mechanical Code.
Install a gas 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 prevent 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.

Union Location

Union Connection
The following pipe sizes are just recommendations. Always consult a local plumber and venting contractor for local codes and regulations during installation.

Pipe Sizing Chart for Natural Gas
The following chart is based on gas pressure in the range 0-0.5 psi, specific gravity of 0.6 and pressure loss of 0.5″ W.C. Numbers are for straight schedule 40 pipe; fittings further reduce capacity. For example, in 1″ size, an elbow is equivalent to about 2.6 feet of pipe and a tee is equivalent to about 5.2 feet of pipe.

Maximum capacity of pipe in cubic feet/hr of natural gas (Multiply values by 1000 to get nominal BTU/hr capacity).

LP-Gas (Liquid Petroleum Gas or Propane)
LP-gas is gas compressed into liquid form for easy transportation and storage. It is also known as propane or bottle gas.
(Propane tanks are not supplied with this equipment.)

LP-gas is flammable, is always contained under pressure and the liquid can freeze skin. Therefore, in the interest of safety, it is important to understand the basic facts about LP-gas and LP-gas containers.
Federal DOT (Department of Transportation) regula-tions require periodic inspections and re-qualifications of cylinders. DO NOT USE damaged or rusted containers.
DO NOT store LP-gas containers indoors or in enclosed areas. Do not expose LP- gas container to heat. Always store with service valve closed and plugged as required.

CAUTION: Use LP-gas containers in proper position.

Most LP-gas pressure washer heaters are designed to operate on LP-gas vapor only. Therefore, all LP-gas containers designed for vapor service must be trans-ported, installed and used in the proper position. Do not transport, install or use a vertical cylinder in a horizontal or upside down position. Proper care must be taken to position a horizontal container in the correct position for vapor withdrawal. Liquid LP-gas could enter the system designed for vapor only, possibly creating a hazardous condition.

Always use a POL plug installed on a POL valve or a dust cap on an ACME/Type 1 valve when transporting or storing disconnected containers (full or empty). Check for leaks after connecting. Apply approved leak detector solution to connection, turn off all burners and pilots and open service valve. Leaks will be detected by the growth of bubbles. If bubbles grow, tighten or repair the connection as needed. Repeat leak test until problem is corrected.
Check all tank and the line connections periodically to be sure they are tight. When testing for leaks, use approved leak detector solution — not matches.
Improved Regulation: The second stage regulator receives a relatively uniform pressure from the first stage regulator. This helps the second stage regulator to maintain appliance pressure at a nearly constant 11″ W.C.

Filling the LP-Gas Container

Only qualified persons should fill your LP-gas containers.

CAUTION : Overfilling is hazardous!

DO NOT allow your LP-gas container to be overfilled. Stop filling when liquid appears at the fixed level gauge. Bleed off excess propane in a safe area. Most LP-gas containers are equipped with a fixed liquid level gauge which contacts the liquid level at 80% of container capacity, allowing 20% for expansion. LP-gas containers not equipped with a fixed liquid level gauge can only be filled by weight.
In cold climates, in order to keep vaporization of LP-gas at the highest level, keep the fuel levels above 50%.

Propane Tank Disposal

Propane tanks present a real danger in the waste stream, so it is essential to properly dispose of old tanks so they do not injure you or sanitation workers. The best way to dispose of unused propane tanks is by calling a propane company to pick it up. Propane tanks are not picked up by garbage collectors, and improper disposal is illegal in some areas. If a propane tank is unfit for service, one should contact a propane company.

Room Vents for Combustion and Ventilation Air

Properly sized vents are vital for the safe and efficient operation of a pressure washer installed in a confined space. When combustion and ventilation air are supplied from inside the building, each opening must have an area of one square inch for every 1,000 BTUH input. When combustion air is supplied from the outside, each opening must have an area of one square inch for every 2,000 BTUH for horizontal ducts and one square inch for every 4,000 BTUH for vertical ducts (refer to NFPA 54).

NOTE: Air vents for combustion and ventilation and exhaust flue sizing must conform to methods outlined in current American Standard (ANSI-Z223.1), National Fuel Gas Code of National Standard of Canada CSA-149.1 and CSA-149.2 “Installation Code for Gas Burner Appliances”.

Exhaust Stack

The purpose of venting a gas-fired pressure washer is to completely remove all products of combustion and to vent gasses to the outside air without condensation in the vent or spillage at the draft hood (except in cases of downdraft or poor stack conditions). Always use strong, gas-tight, insulated pipe.
The design of this pressure washer depends on natural draft (heat induced) to pull combustion gas out of the combustion chamber. The design of the exhaust stack can have a significant impact on the proper operation of the burner and coil.

During vent installation, avoid sharp turns, long hori-zontal runs and improper pitches. Maintain proper support of vent connectors and joints, observe clear-ances from all combustibles and top the vent outlet with an approved cap.

Type “B”, due to its temperature rating, can only be used with natural draft pressure washers. A “B” vent is designed for exhaust temperatures not to exceed 470°F (245°C).
All venting installations must conform to local codes. In the absence of local codes, refer to “National Fuel Gas Code” NFPA 54 and be constructed of materials approved by the Uniform Building Code.
Vents penetrating ceilings or walls should be double-wall approved appliance vents and should be one to two inches from combustibles. Vents passing through enclosed spaces and vents exposed to the weather should also be the double- wall type. Sometimes vents have to be built of such great length that they come apart at their joints under their own weight. These should be screwed together at the joints with sheet metal screws, usually three per joint. If the inspector indicates that the vent is too close to combustibles, it may be necessary to chisel away some of the combus-tible or route the vent pipe around the combustible. The cross-sectional area of any flue shall not be less that the cross-sectional area of the flue vent connection outlet of machine.

Ventilation

Illustration showing air openings necessary to supply air for combustion when installed in an enclosed room.

The pressure washer includes a collar that will mate with standard HVAC ducting. The user will be respon-sible for installation of an exhaust stack. The exhaust stack should include a Draft Diverter/Inducer, Damper, Sampling Port and Rain Cap. An adapter can be installed between the collar and stack to adjust the diameter from 10” to 8” or 12” to 10”.
Size the stack according to the following (see also applicable local and national standards regarding installation of gas-fired appliances):

• 3.5 to 4.4 gpm 10” Collar 8” Stack
• 4.5 to 5.5 gpm 10” Collar 10” Stack
• 6.3 gpm 12” Collar 10” Stack
• 8 – 10 gpm 12” Collar 12” Stack

8.717-728.0 8″
9.801-040.0 10″
8.717-730.0 12″

Draft Diverter/Hood The draft required to vent combustion gases is created by the heat inside the pressure washer coil. A draft diverter helps improve draft into the stack without pulling more air through the combustion box and decreasing combustion efficiency.

The draft diverter can also help prevent back drafting that can inhibit combustion. The draft diverter should be installed a minimum of 36” above the flue collar.
Power Vent (Draft Inducer) If this machine is going to be installed on a 90° or extended exhaust vent run length which may restrict air flow it is recommended that a contractor install a power vent. When a contractor has found it impossible to vent straight through the roof power venting is recommended to help eliminate exhaust restriction of this natural draft machine. This draft inducer (power vent) must be installed by a licensed contractor who can calculate size, operation connections and associated damp- eners. Since we are a manufacturer and not a licensed contractor and as such we are unable to make recom-mendations for suitable make and model of power vents and compliance with local building codes.

Damper An exhaust stack can reduce thermal effi-ciency by drawing in too much combustion air. This can be controlled by adding a damper just below the draft diverter. 8.753-473.0 – 8″ Damper, 8.753-474.0 -10″ Damper, 8.753-418.0 – 12″ Damper.

NOTE: Closing the damper can create high levels of CO in the exhaust. Adjustments to the damper should only be performed by a trained technician using a flue gas analyzer. If an analyzer is not used the damper should be set in the fully open position.

Sampling Port A port for sampling flue gases and measuring the flue gas temperature should be placed 18” above the flue collar. The port should be covered when sampling is not being performed. The size of the port should be only slightly larger than the probe for the flue gas analyzer.

Rain Cap A rain cap should be installed on top of the stack to prevent rain water, leaves and debris from entering the stack. Your installer may also recommend specialty caps for high wind areas or cold weather zones to help prevent back drafting. 8.717-731.0 – 10″ Raincap, 8.717-732.0 – 12″ Raincap

Water Source
The water source for the machine should be supplied by a 5/8″ I.D. garden hose with a city water pressure of not less than 30 PSI. If the water supply is 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 by pushing the collar forward.

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.

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 for any movement or by soaping each pipe connection and watching for bubbles. If a leak is found, make the necessary repairs and repeat the above test.
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 pressure washer and its indi-vidual shut-off valve must be disconnected from gas supply piping system or damage to the gas valve will occur.

Gas Pressure

The incoming gas pressure must be a minimum of 9.0 wc-in and must not exceed 13.8 wc-in or ½ psig to the control valve. Line pressure above ½ psig must be regulated prior to the machine. The ideal supply pressure is 13.0-13.5 wc-in. If the required BTU input can not be achieved consult the factory for instructions regarding changes to the nozzle orifice size and an appropriate manifold setting.

NOTE: Any changes to the burner and manifold pressure setting should only be performed by a trained technician and adjusted using a flue gas analyzer.
The manifold pressure has been preset at the factory according to the table below for optimum operation at sea-level. The manifold pressure and BTU input will be listed on the specification plate for the machine.

For Tech Tip Instructions
Combustion efficiency in a natural draft pressure washer is significantly influenced by the heat created inside the coil, the design of the coil and flue and the length and diameter of the exhaust stack. The table below shows data included in the operator’s manual for flue and stack sizes and gas manifold pressure settings. These sizes are critical for achieving proper combustion and accept-able emissions.

Testing has shown that simply adding a 36” stack extension to the flue adapter on top of the pressure washer can reduce the outlet temperature by 5-10°F.
This occurs by inducing a higher pressure differential at the exit of the coil and increasing the flow of air into the combustion process and through the stack. Most or all of the lost outlet temperature can be recovered by installing and adjusting a damper in the stack. However this adjustment must only be performed by a trained techni-cian using a combustion analyzer. The analyzer must determine percent oxygen and/or percent excess air as a minimum.
The damper should be installed 24-36” above the flue adapter. The pressure washer can be operated safely with the damper fully open but with the lower outlet temperature. If the damper is closed too far there will not be enough oxygen to burn all of the fuel. This will cause higher and potentially dangerous levels of CO in the flue gas emissions.

To adjust the damper for proper combustion and effi-ciency perform the following:

1. If there is no sample port for the analyzer probe, drill a hole slightly larger than the combustion analyzer probe through the exhaust stack at a point about 18” above the flue adapter.
2. Insert the probe of the combustion analyzer so that the tip is at the center of the stack.
3. Open the damper to the fully open position.

4. Start the pressure washer and allow it to heat up for at least 20 minutes before making any adjustments.
5. Note the values for % Excess Air and/or % Oxygen.
6. Close the damper in small increments until %Excess Air is between 20-30% and/or % Oxygen is 4- 5%.

This process can also be used when turning down the firing rate for high altitude installations above 2000 ft.

1. Adjust the gas pressure down 4% for every 1000 ft of elevation.
Example: Recommended firing rate for a 4.8@3000 is 4.2 wc-in. For an installation at 3500 feet reduce this pressure by 16% by setting the manifold pressure to 4.2*.84 = 3.5 wc-in.
A manometer capable of reading to at least the nearest 0.1 wc-in will be required for this adjustment.

2. Follow steps 1-6 above to optimize the outlet temperature of the pressure washer.

Installations Above 2000 ft
Installation at altitudes greater than 2000 ft will require adjustments to the gas manifold pressure.
For installations above 2000 feet the firing rate should be reduced by 4% per 1000 feet. Example: Recommended firing rate for a 4.8@3000 is 4.2 wc-in. For an installation at 3500 feet reduce this pressure by 16% by setting the manifold pressure to 4.2*.84 = 3.5 wc-in. This adjustment should only be made by a properly trained service tech-nician. A manometer capable of reading to the nearest 0.1 wc-in will be required for this adjustment.
In Canada, certification for installation at altitudes over 4500 feet is the jurisdiction of local authorities.

Gas Valve Replacement
If you replace your gas valve the manifold pressure for the new valve will need to be adjusted to match the spec-ification plate for the machine. Follow the installation and adjustment instructions provided with your replacement valve. A manometer capable of reading to the nearest 0.1 wc-in will be required for this adjustment

CAUTION: All gas conversion must be done by a qualified service person in accordance with these instructions and in compliance with all codes and requirements. In Canada, gas conversion shall be carried out in accordance with requirements of the Provincial Authorities having jurisdiction and in accordance with the requirements of the CAN/GGA-B149.1 and .2 installation code.

START-UP

WARNING: Read and follow instructions carefully when installing or servicing machine. Failure to do so may result in damage to property or personal injury.

1. Installation or servicing of gas appliances and controls must only be performed by qualified personnel. After installation or servicing, test the manual valve, operating valves, pressure regulation, and automatic shut-off valve for proper operation.
2. Install in a suitable dry location. Machine must be located in an area properly protected from weather.
3. Shut off gas and electricity before starting installa-tion or service. Turn back on to test or operate.
4. DO NOT connect machine before pressure testing the gas piping. Damage to gas valve may result. (9″ – 14″ W.C.P. or 1/2 PSIG)
5. DO NOT insert any object other than suitable pipe or tubing in the inlet or outlet of the gas valve. Internal damage may occur and result in a hazardous condi-tion.
6. DO NOT short the gas valve terminals.
7. DO NOT grip gas valve body with a pipe wrench or vise. Damage may result causing gas leakage. Use inlet or outlet bosses or a special body wrench.
8. DO NOT allow any flame to impinge on the regulator vent tubing if supplied. It may clog and cause gas valve malfunction.
9. DO NOT use the gas cock to adjust gas flow.
10. If main burner fails to shut off, turn off gas supply.
11. Keep all combustible materials away from gas appli-ances. DO NOT allow lint or dust to collect in burner area.
12. Dials must only be operated by hand. Never use pliers, wrenches or other tools to turn dials.

13. Leak test with a soap solution after installation or service with the main burner on. Coat pipe and tubing joints, gaskets, etc.

FOR YOUR SAFETY READ BEFORE LIGHTING

WARNING
If you do not follow these instructions exactly, a fire or explosion may result, causing property damage, personal injury or loss of life.
A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly.
B. BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
“FOR YOUR SAFETY “WHAT TO DO IF YOU SMELL GAS”
•     Do not try to light any appliance.
•     Do not touch any electrical switch, do not use any phone in your building.
•     Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
•     If you cannot reach your supplier, call the fire dept.
C. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, don’t try to repair it; call a qualified service technician. Forced or attempted repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water. Immediately call a qualified service tech- nician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

Check List Before Starting

CAUTION! If “NO” has been checked on any of the following sixteen questions, do not operate this machine.

| YES| NO
---|---|---
Has gas supply been inspected by an authorized contractor to meet local codes?| |
Is machine protected from downdraft and excessive wind?| |
Is machine shielded from moisture or water spray?| |
Is the voltage correct and are the circuit breaker and supply cord adequate according to specifications and serial plate notation?| |
Is the machine electrically grounded?| |
Is there ample water supply?| |
Have all flammable liquids or gases been removed from installation location?| |
Is there adequate gas supply for the BTU rating of the burner?| |
“Is incoming gas supply pressure between 6″ – 14″ water column inches or 1/2 PSIG?”| |
Has the proper gas regulator been installed for pressure and volume?| |
Have you installed the optional LP
gas regulator assembly 9.802-633.0?| |
Is the machine properly vented to allow adequate air flow?| |
Are the propane tanks large enough, according to rating to prevent freezing?| |
Have gas lines been checked for gas leaks?| |
Have gas lines been checked with local codes?| |
Have all operators using this machine been instructed properly and have they read the manual?| |
Has the machine been installed according to operator’s manual instructions?| |

Assembly Instructions

STEP 1: Attach the high pressure hose to the spray gun using teflon tape on hose threads. Move safety latch into locked position to prevent

STEP 2: Connect the high pressure hose to the discharge fitting. Push coupler collar forward until secure.

STEP 3: Connect garden hose to the cold water source.

spray gun trigger from activating.

STEP 4: Connect the garden hose to pump water inlet. Inspect inlets.

CAUTION: Do not run the pump without water or pump damage will result.

STEP 5: Before installing nozzle, turn on the water supply and run machine allowing water to run from the end of the wand until clear. Turn off machine.

STEP 6: Pull the spring-loaded collar of the wand coupler back to insert pressure nozzle. Release the coupler collar and push the nozzle until the collar clicks. Pull the nozzle to make sure it is seated properly.

Operating Instructions

STEP 1: Have an electrician connect power supply into elec-trical box according to information shown on the serial plate.

STEP 2: Turn on main gas supply and depress and turn control knob to the ‘ON’ position.

STEP 3: Push pump ‘ON’ switch, or turn to pump position and pull the trigger on the spray gun allowing cold water to flow. To activate the gas control valve for hot water, push the burner switch to the ‘ON’ position and pull the trigger on the spray gun.

STEP 4: To apply detergent open the detergent valve counterclock-wise making sure that the detergent pick-up tube is in the detergent solution and not sucking air.

STEP 5: To Stop: Turn the burner switch off and place the detergent pick- up tube into fresh water. Open the detergent valve and trigger spray gun allowing detergent lines to be flushed and the burner to cool. Otherwise, coil damage will result. After water has cooled, turn pump switch to OFF position. If the machine is going to be off for an extended period of time, put the manual valve on the gas valve into the OFF position.
Turn the water off. Protect from freezing.

NOTE: Do not allow acids, caustic or abrasive fluids to pass through the pump.
NOTE: Never run pump dry or leave spray gun closed longer than 3 minutes.

NOTE: High Pressure Nozzle Must Be Attached At End Of Wand To Obtain High Pressure. To Apply Soap, See Applying Detergent & General Operating Techniques.

Applying Detergent & General Operating Techniques

WARNING: Some detergents may be harmful if inhaled or ingested, causing severe nausea, fainting or poisoning. The harmful elements may cause property damage or severe injury.

STEP 1: Use detergent designed specif-ically for pressure washers. Household detergents could damage the pump. Prepare detergent solution as required by the manufacturer. Fill a container with pressure washer detergent. Place the filter end of detergent suction tube into the detergent container.

STEP 2: Open detergent valve counter-clockwise until you obtain desired mixture. Detergent will mix with the high pressure water stream.

STEP 3: With the motor running, pull trigger to operate machine. Liquid detergent is drawn into the machine and mixed with water. Apply detergent to work area. Do not allow detergent to dry on surface.

STEP 3: With the motor running, pull trigger to operate machine. Liquid detergent is drawn into the machine and mixed with water. Apply detergent to work area. Do not allow detergent to dry on surface.

NOTE: If you remove detergent siphon tube from container or allow container to empty, it will cause low pressure by sucking air, which will damage the pump.

Thermal Pump Protection

If you run the engine for 3-5 minutes without pressing the trigger on the spray gun, circulating water in the pump can reach high temperatures. When the water reaches this temperature, the pump protector engages and cools the pump by discharging the warm water onto the ground. This thermal device prevents internal damage to the pump.

Cleaning Tips
Pre-rinse cleaning surface with fresh water. Place detergent suction tube directly into cleaning solution and apply to surface. For best results, limit your work area to sections approximately 6 feet square and always apply detergent from bottom to top. Allow detergent to remain on surface 1-3 minutes. Do not allow detergent to dry on surface. If surface appears to be drying, simply wet down surface with fresh water. If needed, use brush to remove stubborn dirt. Rinse at high pressure from top to bottom in an even sweeping motion keeping the spray nozzle approximately 1 foot from cleaning surface. Use overlap-ping strokes as you clean and rinse any surface. For best surface cleaning action spray at a slight angle.

Recommendations:

• Before cleaning any surface, an inconspicuous area should be cleaned to test spray pattern and distance for maximum cleaning results.
• If painted surfaces are peeling or chipping, use extreme caution as pressure washer may remove the loose paint from the surface.
• Keep the spray nozzle a safe distance from the surface you plan to clean. High pressure wash a small area, then check the surface for damage. If no damage is found, continue to pressure washing.

CAUTION – Never use:

• Bleach, chlorine products and other corrosive chemicals
• Liquids containing solvents (i.e., paint thinner, gasoline, oils)
• Tri-sodium phosphate products
• Ammonia products or acid-based products

These chemicals will harm the machine and will damage the surface being cleaned.

Rinsing
Turn detergent valve clockwise to close. Operate pressure washer and allow a few seconds for the detergent to clear.

Shutting Down And Clean Up

STEP 1: Turn the burner switch to the ‘OFF’ position.

STEP 2: Place the detergent tube in fresh water and open the detergent valve and spray gun, allowing the detergent lines to be flushed and the burner to cool. Otherwise coil damage may occur.

STEP 3: After water has cooled, push or turn pump switch to ‘OFF’ position. If the machine will be turned off for an extended period of time, put the gas cock on the gas valve in the ‘OFF’ position.

STEP 4: Turn off water.

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.

1. Stop the pressure washer, squeeze spray gun trigger to release pressure.
2. Detach water supply hose and high pressure hose.
3. Turn on the machine for a few seconds, until remaining water exits. Turn pump 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 follow the above directions will result in damage to your pressure washer.

After Extended Storage

CAUTION: Prior to restarting, thaw out any possible ice from pressure washer hoses, spray gun or wand.

Maintenance

Maintenance And Service

Spray Nozzles
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 Valves
Unloader valves relieve pressure in the line when a spray gun is closed. Unloader valves are preset and tested at the factory before shipping. Occasional adjustment of the unloader may be necessary to maintain correct pressure. For valve adjustment contact your nearest dealer or call technical support. Tampering with the factory setting may cause personal injury and/or property damage, and will void the manu-facturer’s warranty.

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.
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 recom-mended. This is done by pouring a 50-50 mix of anti-freeze 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 water will be blown out of the system. The use of a draft diverter 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 developed 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 a high limit control switch. In the event the temperature of the water should exceed its operating temperature, the high limit control will turn the burner off until the water cools.

Pumps
Use only SAE 10W-40 weight non-foaming oil. Change oil after first 50 hours of use. Thereafter, change oil every year or at 500 hour intervals. Oil level should be checked through use of the dipstick 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. Check into the burner compartment with a drop light or flashlight. If no leaks are visible, then water dripping from coils is condensa-tion 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, giving the appearance of a leaking coil, particularly on cold humid days.

Descaling Coils
In alkaline water areas, lime deposits can accumulate rapidly inside the coil pipes. This growth is increased by the extreme heat build up in the coil. The best preven-tion for liming conditions is to use high quality cleaning detergents. In areas where alkaline water is an extreme problem, periodic use of Landa Coil Descaler (part # 8.914-296.0) will remove lime and other deposits before coil becomes plugged.

Periodic descaling of the heating coil is recom-mended so please consult your local Landa Dealer for instructions.

Gas Valve Regulator Adjustment

Adjustment of the built-in regulator isn’t normally necessary, since it is preset at the factory. However, field adjustment may be accomplished as follows:

1. Attach manometer at pressure tap port.
2. Remove regulator adjustment screw cap.
3. With a small screwdriver, rotate the adjustment screw clockwise to increase or counterclockwise to decrease gas pressure.
4. Replace regulator adjustment screw cap.

Pressure Relief Valve

Each machine is equipped with a relief valve to relieve pressure in the system when higher than normal operating pressures are encountered. If operating pressure of machine is found to be normal and relief valve continues to leak, repair or replace the valve.

CAUTION: Relief valve can become obstructed by deposits and must be unscrewed at least once per year to allow discharge.

Propane Gas

General Safety Precautions
Have a qualified gas service person assist in any gas burner installation or service. Few maintenance people or mechanics are knowledgeable in gas controls or related safety practices. Propane gas is heavier than air; unburned 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 vapor propane fuel 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 gas pressure. Propane bottles are not included with the machine. A pressure regulator should be installed between propane bottle and gas valve.

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 vapor gas. As gas is used from the propane cylinder, the liquid in the cylinder boils to maintain vapor gas pressure. This boiling process cools the liquid, and in a heavy, continuous-demand situation, the liquid temperature can fall to the point at which it cannot provide vapor 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°F, on the cold cylinder or by manifolding two propane bottles together to increase total vaporization capacity. It is recom-mended that a minimum 100 lb. vapor 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 an Intermittent Pilot Ignition System. This system is designed to eliminate the need for a constant burning pilot. Lighting of the pilot is accomplished through electronic spark ignition each time the burner switch is turned on. Do not attempt to light the appliance manually as a burn injury or electrical shock may result. The pilot light will remain on and the main gas valve is turned off when the spray gun is closed.

Care of Main Burner
Due to condensation from heater coils dripping down on the burners, scale build-up may occur in the burner jet orifices.

1. To Remove Burner Manifold From

Water Heater Coil
Turn off the gas to the main burner by turning the knob to the “OFF” position on the gas valve and the main gas supply.
Disconnect the pilot and ignition lines from the gas valve. Disconnect union in main burner line below thermostat.
Slide burner manifold out through shell opening.

2. To Clean Burner Jets
Select proper size drill for type gas involved. Use pin vise to hold drill and ream out each jet orifice.

CAUTION: Do not ream out orifices to a larger size.

If the water heater will be exposed to freezing weather, an anti-freeze solution should be circulated through the coil by whatever means are available for the particular system the water heater is used on.

Burner Basic Facts

1 Cu. Ft. NG Approx 1000 BTU
Formula| C3H8| C4H10
Vaporization Point (°F)| -43.7| 31.1
Specific Gravity (Vapor)| 1.522| 2.006
Specific Gravity (Liquid)| 0.508| 0.584
Lbs. per Gal. (Liquid)| 4.23| 4.87
BTU per Cu. Ft. (Vapor)| 2.563| 3.39
BTU per Gal. (Liquid)| 91.547| 102.032
BTU per Lb. (Liquid)| 21.591| 21.221
Cu. Ft. per Lb. (Liquid)| 8.607| 6.53
Cu. Ft. per Gal. (Liquid)| 36.45| 31.8
Octane Number| 125| 91
Molecular Weight| 44.09| 58.12
To Calculate Running Cost:                                    1,000 BTU = 1 Cu. Ft.
100 Cu. Ft. = 1 Therm
1 Therm = 1 Hour
Cost of Gas per Therm = Cost to Run
Example Using Natural Gas at 50¢ Therm:            400,000 BTU Machine
400 Cu. Ft.    (400,000 / 1,000)
4 x 50¢ = $2.00 / Hour to Run     ((400 / 100) x cost of gas)

Pressure Equivalents

Simply stated, pressure is the force exerted 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 levels, it is expressed in water column inches i.e. 11 w.c.i. Higher pressures are expressed in terms of the force exerted against a square inch of area, for example, 125 lbs. per square inch (125 psi).

Oil Change Record

Date Oil Changed Month/ Day/Year| Estimated Operating Hours Since Last Oil Change
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This pressure washer was produced with the best available materials and quality craftsmanship. However, you as the owner have certain responsibilities for the correct care of the equipment. Attention to regular preventative main- tenance procedures will assist in preserving the performance of your equipment.

Contact your dealer for maintenance. Regular preventative maintenance will add many hours to the life of your pressure washer. Perform maintenance more often under severe conditions.

Maintenance Schedule

Replace Fuel Lines| Annually
Pump Oil
10W-40 Non-foaming| Inspect| Daily inspect the oil level
Change| After first 50 hours, then every 500 hours or annually
Clean Burner Filter| Annually
Remove Burner Soot From Heating Coil| Annually
Check Belt Tension| Monthly
De-scale Coil| Annually – (more often if required)
Replace High Pressure Nozzle| Every 6 months
Replace Quick Connects| Annually
Clean Water and Chemical Screen/Filter| Weekly
Clean Float/Supply Tank| Every 6 months
Replace HP Hose| If there is any sign of wear
Grease Motor| Every 10,000 hours
Check Burner Pilot Jets| Annually
Pressure Relief Valve| Annually

Troubleshooting

incoming water temperature.
Gas pressure too high| See specifications for proper gas pressure.
Detergent line sucking air| Tighten all clamps. Check detergent lines for
holes.
Defective high limit switch| Replace.
Incorrect burner nozzle size| See serial plate.
Insufficient water supplied| Check water GPM to machine.
Restricted water flow| Check nozzle for obstruction, proper size.
PRESENCE OF WATER IN OIL| Oil seal worn| Check and replace if necessary.
High humidity in air| Check and change oil twice as often.
WATER
DRIPPING FROM UNDER PUMP| Piston packing worn| Check and replace if necessary.
O-Ring plunger retainer worn| Check and replace if necessary.
DETERGENT NOT DRAWING| Air leakTighten all clamps.| Check detergent lines for holes.
Detergent metering valve packing not tight or
packing worn| Tighten nut. Replace valve or packing.
Filter screen on detergent suction hose
plugged| Clean or replace.
Dried up detergent plugging metering valve| Disassemble and clean thoroughly.
High viscosity of detergent| Dilute detergent to specifications.
Restriction behind float tank screen removed| Install restriction.
Hole in detergent line(s)| Repair hole.
Strainer basket plugged| Remove and clean.
Connections on selector valve loose| Put teflon tape on all pipe connections.
Detergent solenoid not opening
(where applicable)| Check flow switch, replace detergent
solenoid.
PUMP  RUNNING NORMALLY BUT PRESSURE LOW ON INSTALLATION| Pump sucking air| Check water supply and possibility of air.
Valves sticking| Check and clean or replace if necessary.
Unloader valve seat faulty| Check and replace if necessary.
Nozzle incorrectly sized| Check and replace if necessary
(See serial plate for proper size).
Worn piston packing| Check and replace if necessary.
FLUCTUATING PRESSURE| Valves worn| Check and replace if necessary.
Blockage in valve| Check and replace if necessary.
Pump sucking air| Check water supply and air seepage at joints
in suction line.
Worn piston packing| Check and replace if necessary.
PUMP NOISY| Air in suction line| Check water supply and connections on suction line.
Broken or weak inlet or discharge valve springs| Check and replace if necessary.
Excessive matter in valves| Check and clean if necessary.
Worn bearings| Check and replace if necessary.
PROBLEM| POSSIBLE CAUSE| SOLUTION
---|---|---
OIL DRIPPING| Oil seal worn| Check and replace if necessary.
LOW OPERATING PRESSURE| Faulty pressure gauge| Install new gauge.
Insuffient water supply| Use larger garden hose. Clean filter washer at water inlet.
Old, worn or incorrect spray nozzle| Match nozzle number to machine
and /or replace new nozzle.
Belt Slippage| Tighten or replace. Use correct belt.
Plumbing or hose leak| Check plumbing system for leaks.
Retape leaks with teflon tape.
Faulty or misadjusted unloader valve
(where applicable)| Adjust  unloader for proper pressure. Install repair kit when needed.
Worn packing in pump| Install new packing kit.
Fouled or dirty inlet or discharge valves in
pump| Clean inlet and discharge valve.
Worn inlet or discharge valves| Replace with valve kit.
Obstruction in spray nozzle| Remove obstruction.
Leaking pressure control valve (where applicable)| Rebuild or replace as needed.
Detergent metering valve left open sucking air or faulty metering valve| Close and /or replace metering valve.
Slow motor RPM| Check incoming voltage.
LOW WATER TEMPERATURE| Improper size of gas lines| See sizing gas lines.
Low gas pressure| Increase gas pressure to machine.
Improper pressure regulator| Specify BTU, building gas pressure 11 w.c.i.
to machine for correct sizing of regulator.
Low gas pressure| Increase gas pressure
Soot buildup on coils not allowing heat transfer| Clean coils.
Improper burner nozzle| See serial plate.
PROBLEM| POSSIBLE CAUSE| SOLUTION
---|---|---
FLOW & BURNER SWITCH ON; NO SPARK,
NO PILOT GAS| A. No main power
B. Faulty transformer
C. Faulty burner & flow switch
D. Faulty ignition control unit| With power switch on, open trigger on spray gun and set your test meter to the 24 volt scale. Probe terminals 24V and 24V(GND). If you do not read 24 volts, the problem is not the ignition system.
Perform normal system checks of main power, transformer, thermostat and the limit control. If you do read 24 volts at TH and GND, the problem is in the ignition system. Check for loose or defective wiring. If wiring is good, replace the ignition control unit.
HAVE SPARK, NO PILOT GAS FLOW| Main gas supply turned off| Set test meter to 24 volt scale.
1. Be sure main gas valve (gas cock or selector arm) is turned on.
2. With gas on and system sparking, probe terminals PV and 24V(GND). If pilot gas does not flow with 24 volts at these terminals, replace gas valve.
3. Probe terminals PV and MV/PV.  If 24 volts not present, replace ignition control box.
HAVE PILOT GAS, NO SPARK| A. Defective ignitor/ sensor and or its wiring| Set test meter to ohm scale.
1. Disconnect the wire from the IGN terminal on the ignition control unit.
B. Faulty ignition control unit| 2. Touch one meter probe to the tip of the ignitor/ sensor rod in the pilot. Touch the other probe to the quick connect at the other end of ignitor/sensor wire.
3. If you have continuity from the tip of the ignitor/ sensor rod to the connector and no spark, replace the ignition control unit.
4. If you do not have continuity through wire and the ignitor/sensor, check for a loose wire connection in the wire. Repair as needed.
5. Check to see if spark shorts to burner ring through a cut in the ignitor wire.

FAQ

How do I order repair parts?

Authorized dealers can provide you with the necessary repair parts. When placing an order, make sure to provide the machine model and machine serial number. You can find this information in the MACHINE DATA box located on the inside of the front cover of the manual.

Where can I find the model and serial number of my machine?

The model and serial number of your machine are located on the back of the machine.

Where can I find important safety information?

Important safety information can be found in the SAFETY section of the manual.

What is the purpose of the thermal pump protection feature?

The thermal pump protection feature helps in maintaining the performance

of the pressure washer by preventing overheating of the pump.

How should I store the pressure washer when not in use?

Refer to the Storage section of the manual for guidelines on proper storage of the pressure washer.

References

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