Buffalo Series Industrial Hot Water Electric Driven Natural Gas and Propane Fired OWNER’S MANUAL Call 1-800-315-5533 E-mail sales@easykleen.com Website: www.easykleen.
2 Easy-Kleen Pressure Systems 1-800-315-5533 This manual contains operational information that is specific for The EZN and EZP Buffalo Series gas fired, electric driven models. Read the following instructions carefully before attempting to assemble, install, operate or service this pressure washer. Failure to comply with these instructions could result in personal injury and/or property damage. Table of Contents IMPORTANT SAFETY INFORMATION ...............................................................
3 IMPORTANT SAFETY INFORMATION The safe operation of our pressure washing systems is the FIRST priority of Easy-Kleen. This will only be achieved by following the operation and maintenance instructions as explained in this manual and all other enclosed manuals. This manual contains essential information regarding the safety hazards, operations, and maintenance associated with this machine. The manual should always remain with the machine, including if it is resold.
4 WARNING: Dangerous Gases DANGEROUS GASES 3. If you smell gas, shut off the gas supply to the appliance, extinguish any open flame, and test all joints with a soap solution. If the odor persists, call your gas supplier immediately. WARNING: Keep water spray away from electrical wiring. 4. Allelectrically powered equipment must be grounded at all times to prevent fatal electric shocks. Do not spray water on or near electrical components.
5 WARNING: Trigger gun kicks back. Hold with both hands. 7. Hold firmly to the gun and wand during start up and operation of the machine. Do not attempt to make adjustments while the trigger gun is in operation. 8. Make sure all quick coupler fittings are properly secured before operating pressure washer. WARNING: Risk of injury from falls when using ladder. 9. Do not overreach or stand on anything unstable. Keep a good balance and make sure to keep a steady footing at all times.
6 15. Never run pump dry of water or oil or let the pump run with the trigger gun released for more than 2 minutes 16. Do not attempt to operate this machine if fatigued or under the influence of alcohol, prescription medications, or drugs. 17. Some of the maintenance procedures involved in this machine require a certified technician (these steps are indicated throughout this manual). Do not attempt to perform these repairs if you are not qualified.
7 MODEL SPECIFICATIONS BUFFALO SERIES: Industrial Hot Water Electric – Natural Gas and Propane Fired MODEL* EZN1502-1 GPM PSI BTU DRIVE HP VOLTAGE 2 1500 195,000 DIRECT 2 120V-1PH EZN2435E-1 3.5 2400 290,000 DIRECT 5 220V-1PH EZN3035E-1 EZN2004F-1 EZN2004-1 EZN2004F-3 EZN2004-3 3.5 3000 290,000 DIRECT 7.
8 Easy-Kleen Pressure Systems 1-800-315-5533 INTRODUCTION Thank you for selecting a quality Easy-Kleen product. We are pleased to have you included among the many satisfied owners of Easy-Kleen cleaning machines. Years of engineering have gone into the development of these fine products and only top quality components and materials are used throughout. Each machine is carefully tested and inspected before leaving our plant to ensure years of dependable performance.
9 OPERATING INSTRUCTIONS 1. Perform pre-start maintenance inspection on all applicable systems prior to operating machine. This is essential for the safe, effective, and efficient operation. You will get optimum performance from your system ONLY if these instructions and inspections are followed. Any indication that the pressure washing system was not operated and maintained according to these instructions may cancel the manufacturers’ warranty.
10 5. Burner operation Be sure water is flowing through water heater coil before turning on burner switch. Turn thermostat to desired temperature. Burner will ignite and remain in operation as long as there is sufficient water flow to satisfy pressure switch and outlet temperature is below the thermostat set point. IF YOU EXPERIENCE IGNITION FAILURE, DO NOT ATTEMPT TO RESTART BURNER! EXCESS FUEL AND VAPORS MAY HAVE ACCUMULATED, AND THE CHAMBER MAY BE HOT.
11 9. Prior to storage – Inspect the pressure washer for any damage or required maintenance. Do not expose machine to temperatures below freezing (0oC/32oF). 10. Warning – If unit is left running while not in use, pump damage will occur. Do not leave unit running while not in use! CHEMICAL APPLICATION Downstream Chemical Injection: Standard (Direct Drive Units) High Pressure Soap (Belt and Flange Driven Units) NOTE: Do not remove back flow preventer as chemical may flow back into potable water source.
12 GENERAL MAINTENANCE Burner Maintenance Repair of the burner is to be done by authorized and trained burner professionals only. See the included hot water heater manual for more information. Water Condition Use a softener on your water system if local water is known to be high in mineral content. The advantages of soft water are very beneficial: prevents scale buildup in heater coil, cleans better with considerably less detergent, prevents streaking on painted surfaces and glass when rinsing.
13 GLOSSARY OF TERMS AUTO START/STOP – Unit will automatically start when the trigger is pulled, and it will stop the motor on time delay after the trigger has been released in order to prevent the pump from bypassing and overheating. PSI – Pounds per square inch. Pressure washers are designed and rated to operate at a specific PSI. Operating at pressures exceeding the maximum rating could result in damage to the unit and/or SEVERE PERSONAL INJURY. GPM – Gallons per minute.
14 COMPONENT IDENTIFICATION Closed Shroud: Hot Water Outlet Quick Connector Electrical Box with Switches Hot Water Coil & Tank Water Pump Gas Regulator and Inlet Adjustable Burner Thermostat Water Inlet to float tank Shroud (Closed) Chemical Valve and Regulator PUMP & BURNER Switches Buffalo Series • Rev.
15 Open Shroud: Integrated Belt Guard Pump Shroud (Tipped Ahead) Motor Belt Drive Buffalo Series • Rev.
16 Hot Water Heater: Flue Outlet Hot Water Outlet Quick Connector Coil Skin Rupture Disk High Limit Switch Gas Valve Water Inlet Safety Relief Valve Buffalo Series • Rev.
17 Pressure Wand Assembly: Nozzle Quick Coupler Spray Gun Trigger High Pressure Hose Black Nozzle (for Downstream Chemical Applications only) Wand Nozzles Buffalo Series • Rev.
18 Flow Activated Pump Assembly: Unloader Pump Head Pressure Gauge Burner Control Pressure Switch Flow Switch Ball valve GP Pump Water Inlet from Float Tank Line from Chemical Injector (High Pressure Soap) (EK models also available) Buffalo Series • Rev.
19 Pressure Switch Pump Assembly: Unloader Pump Head Pressure Gauge Auto Start/Stop Pressure Switch Burner Control Pressure Switch GP Pump Auto Start/Stop Pressure Switch Water Inlet (EK models also available) Ball valve Line from Chemical Injector (High Pressure Soap) Buffalo Series • Rev.
20 Direct Driven Pressure Switch Pump Assembly: Auto Stop/Start Pressure Switch Safety Relief Valve Unloader Burner Control Pressure Switch Chemical Injector (Downstream) Auto Stop/Start Pressure Switch Water Pump Water Inlet High Limit Switch Hot Water Outlet Quick Connector Buffalo Series • Rev.
21 QUICK DIAGNOSTICS AND SOLUTIONS GUIDE PROBLEM No pressure or Very low pressure PUMP TYPE OF OIL EK Pump Hydraulic 68 (650ml) GP Pump 30W SAE Non-Detergent POSSIBLE CAUSES SOLUTIONS Metal in oil - Examine oil in pump to see if there is metal in the oil. - If you find traces or pieces of metal, your pump has damaged components. PRESSURE Dirt in water - Verify if there is dirt in nozzle tip or in valves in the pump. - If nozzle is plugged, clean it or replace it.
22 PROBLEM POSSIBLE CAUSES SOLUTIONS BURNER Damaged thermostat No hot water Damaged pressure switch - Make sure thermostat is connected properly. - If burner fan does not come on when you turn the thermostat dial, replace thermostat. - Make sure the pressure switch is connected properly to burner unit. Take cover off pressure switch by unscrewing the 4 screws on the front part of the switch (switch is located on pump).
MANUFACTURER’S WARRANTY The manufacturer warrants all original equipment of the manufacturer to be free from defects in material and workmanship as follows: Pump Head Pump Crankcase Internal Pump Parts Heating Coil Honda Engine* Kohler Engine* Others Electric Motor* Frame and Body Materials Burner Assemblies Wheels and Castors Accessories, Unloader, Safety Valves Hoses, Fittings, O’Ring, and Elastomers Pressure Gauges 10 years 5 years 90 days 5 years, 1 prorated 3 years, 1 year 1 year Lifetime 1 year 90 da
Easy-Kleen Pressure Washers Service Manual This manual is intended for technical personnel to assist in the diagnosis and repair of issues with pressure washers. This manual is not intended for use by non-technical personnel. It is advised to always refer to competent technical personnel when repairs are advised to avoid equipment damage or potential personnel injury. If you have any technical questions please do not hesitate to call us at 1- 800-315-5533.
POWER SYSTEM DIAGNOSTICS - Gas Motor Not Starting PROBLEM Gas motor not starting Spark Plug - strong gas smell Fuel POSSIBLE CAUSE No ignition Check ignition by removing spark plug from cylinder. If electric start, try starting using the recoil starter. Electric Starter/Battery Fuse blown in key switch Recharge or replace battery. 18 amp engine, open key switch, replace 30 amp fuse Flooded Wait 5 minutes before attempting to restart.
FLUID SYSTEM DIAGNOSTICS - Flow and Pressure PROBLEM No Flow POSSIBLE CAUSE No power Trigger gun valve No water source Clogged spray nozzle Clogged inlet filter Float Valve stuck (optional) Faulty unloader valve Incorrect or no spray nozzle Low pressure, adequate flow Worn spray nozzle Debris in valves Lance on low pressure Unloader is not adjusted correctly Pressure gauge inaccurate Low pressure, low flow Pump packings bad Volume Improperly adjusted Discharge leaks Downstream chemical injector (Dema)
PROBLEM POSSIBLE CAUSE Improperly adjusted unloader Faulty unloader SOLUTION Nozzle must be properly sized for the rated flow and pressure. Reset unloader or pressure relief if nozzle size is changed. Check the pressure gauge using a properly calibrated pressure gauge on quick connects at the equipment outlet. Adjust to the proper pressure using pressure gauge. Check the unloader action. If it is not working properly, it may need repaired or replaced.
FLUID SYSTEM DIAGNOSTICS - Unloader PROBLEM POSSIBLE CAUSE Very low or no flow Unloader stuck in bypass Unloader will not unload Debris in unloader Sever leak on the outlet of unit Improper flow Unloader (flow) cycles with system under pressure Nozzle to small Nozzle clogged Improper unloader orifice Unloader orifice clogged Injector orifice clogged Other downstream restriction Pump not delivering the rated pressure High water supply pressure Unloader (flow) cycles with system in bypass No restrict
Unloader (pressure) produces low flow and normal pressure Unloader (flow) produces low flow & normal pressure Unloader (pressure) leaks from main spring or adjusting bolt Unloader (flow) pressure increases when trigger released Unloader (flow) leaks water around adjusting bolt Unloader adjusted too low If the unloader is diverting flow to bypass it may be adjusted too low, readjust as necessary.
FLUID SYSTEM DIAGNOSTICS - Leaking ANY LEAKS SHOULD BE REPAIRED ASAP TO PREVENT DAMAGE TO THE SYSTEM. PROBLEM From inlet From low pressure (inlet) line fittings POSSIBLE CAUSE Garden hose washer SOLUTION Ensure the washer is present and in good condition. Loose clamps or connections Low pressure line should be properly sealed on barb and tightly clamped.
FLUID SYSTEM DIAGNOSTICS - Trigger Gun/Spray Nozzle PROBLEM POSSIBLE CAUSE Broken piston rod in trigger gun No nozzle flow from nozzle when trigger depressed.
BOILER SYSTEM DIAGNOSTICS - Oil Burner Will Not Fire PROBLEM POSSIBLE CAUSE Not reaching rated pressure Not activating boiler controls flow Thermostat on low setting Thermostat set too low Burner no getting adequate fuel No or low fuel in tank Low fuel shut-off control activated.
PROBLEM Steady fuel flow at bleed valve but none in combustion chamber Boiler controls activating Solenoid valve energizing Air and fuel flow proper POSSIBLE CAUSE SOLUTION Remove the solenoid cover and place blade of an insulated screwdriver in the coil with the system operating in hot water mode. A good working solenoid will hold the screwdriver in the solenoid. If not it may need replaced. Oil pump may have debris, replace as necessary.
BOILER SYSTEM DIAGNOSTICS -Gas Burner Will Not Fire PROBLEM No arc at the ignition pilot assembly Ignition operating properly Boiler controls operating properly POSSIBLE CAUSE SOLUTION Spark gap incorrect Check the spark gap and reset if necessary. Check for air in the propane line. Ignition module bad Boiler controls malfunctioning Check the ignition module and replace if necessary. Check boiler controls for good operation and correct problems.
BOILER SYSTEM DIAGNOSTICS - Boiler Controls PROBLEM No voltage solenoid Solenoid coil does not energize Solenoid coil energizes POSSIBLE CAUSE SOLUTION Boiler control or electrical problem A multimeter can be used to check continuity through controls and pinpoint the problem areas. Bad connection to solenoid coil Electrical connections to solenoid valve coil should be tight and not corroded. Coil bad Check to see if fuel solenoid will energize when the proper voltage is applied.
BOILER SYSTEM DIAGNOSTICS - Flow Switch - Optional PROBLEM Reed switch activates when tested with external magnet Reed switch does not activate when tested with external magnet POSSIBLE CAUSE SOLUTION Magnet fouled and will not move If magnet does not move freely within its housing, remove debris to unstick it.
