MODEL 771/772 OPERATING INSTRUCTIONS AND PARTS MANUAL Read instructions carefully before attempting to assemble, install, operate or service this pressure washer. Failure to comply with instructions could result in personal injury and/or property damage! SPECIFICATIONS ● Pump Volume At Pump Head: 3.0 GPM/180 GPH ● Pump Pressure At Pump Head: 1500 PSI ● Burner Type: (771) LP Gas Fired, 376,000 BTU/Hr.; LIS T E D ® Conforms To UL Standard 1776 (772) Natural Gas Fired, 378,000 BTU/Hr.
CONTENTS Introduction & Safety Information 4-6 Component Identification 7 Assembly Instructions 8 Installation Instructions 9-12 Operating Instructions 13-14 Maintenance and Service 15 Troubleshooting 16-17 Warranty Model Number _____________________________ Serial Number _____________________________ Date of Purchase ___________________________ The model and serial numbers will be found on a decal attached to the pressure washer.
WASHER OPERATOR’S MANUAL PRESSURE INTRODUCTION & IMPORTANT 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.
WARNING WARNING: This machine exceeds 85 db appropriate ear protection must be worn. EAR PROTECTION MUST BE WORN HOT DISCHARGE FLUID: DO NOT TOUCH OR DIRECT DISCHARGE STREAM AT PERSONS. WARNING RISK OF INJURY. HOT SURFACES CAN CAUSE BURNS WARNING: This machine produces hot water and must have insulated components attached to protect the operator. WARNING: Risk of injury. Hot surfaces can cause burns. Use only designated gripping areas of spray gun and wand.
WASHER OPERATOR’S MANUAL PRESSURE IMPORTANT SAFETY INFORMATION 23. Never expose a spark or flame where there may be unburned gas present. 24. Install the machine 18” above the floor and about 2 feet from wall providing adequate ventilation and space. 25. When making repairs disconnect from electrical source and shut off gas valve. 26. Install this machine on non combustible flooring. 27. Do not allow acids, caustic or abrasive fluids to pass through the pump. 28.
Control Box PRESSURE WASHER COMPONENT IDENTIFICATION Exhaust Stack OPERATOR’S MANUAL Relief Valve ON Wand Unloader Valve Pump UM P LO T LI GH T RES ET F BU RN ER TE MP ER AT UR E A R M E N R E OS E P TV S High Pressure Nozzle W R N N G GFCI 89412460-8 Spray Gun Detergent Screen High Pressure Hose Gas Valve Pump — Delivers a specific gpm to the high pressure nozzle which develops pressure.
WASHER OPERATOR’S MANUAL PRESSURE ASSEMBLY INSTRUCTIONS Unpacking Pressure Hose, Trigger Gun and Wand Unpack carefully. Wear safety glasses or goggles while unpacking, assembling or operating pressure washer. If there are missing components or hidden damage, immediately contact distributor or carrier concerning discrepancies. 1. When assembling, use teflon tape on all plumbing connections to prevent leakage. 2. Install the pressure hose on the pressure washer as shown in Figure 2. 1.
Getting Started from most heating contractors). A draft diverter will permit proper upward flow of exhaust flue gases. IMPORTANT: Proper initial installation of equipment will assure more satisfactory performance, longer service life, and lower maintenance cost. Using LP Vapor Fuel From A Portable Bottle IMPORTANT: The use of a backflow-preventer on the water supply hose is recommended and may be required by local codes. The model 771 has been factory built to use LP Vapor fuel. DO NOT USE LIQUID FUEL.
WASHER OPERATOR’S MANUAL PRESSURE INSTALLATION INSTRUCTIONS 4. Use pipe thread sealing compound at all hose connections and at gauge port pipe plugs to prevent leaks. DO NOT use teflon plumbing tape. 5. Attach a 3/4" inside minimum diameter LP gas hose to the inlet port of the machine. Make sure you use a hose that is suitable for LP gas. 6. Install the gas pressure gauge or manometer into the gas valve inlet pressure tap.
. Enlarge the diameter of each nozzle using a #55 drill bit (.052"). Make sure the holes are drilled straight and all metal shavings are cleared from inside nozzles. Carefully reinstall the nozzles into the burner ring, do not over tighten, do not use pipe thread sealing compound. 11. Remove regulator cap screw, pressure regulator adjustment screw and spring. (Refer to Figure 7.
WASHER OPERATOR’S MANUAL PRESSURE INSTALLATION INSTRUCTIONS Available through Hotsy, Part Number 860178. 1. Refer to Converting to Natural Gas and follow steps 1 through 6. 2. Discard pilot and replace with LP vapor gas pilot, Hotsy Part Number 829858. 3. Carefully remove burner ring nozzles. 4. Replace the natural gas nozzles with the #66 gas nozzles. It is important to replace them as LP vapor gas is required to use smaller orifice gas nozzles than natural gas.
Before Starting 1. Read all manuals provided with this pressure washer. Become familiar with location and function of all operating and safety controls. 8. Install the pressure nozzle on end of wand, (refer to Figure 8). Pressure Nozzle WARNING: Make sure all switches and controls are in the OFF position prior to plugging in electrical cord. DANGER: Do not stand in water while plugging or unplugging electrical cord.
WASHER OPERATOR’S MANUAL PRESSURE OPERATION INSTRUCTIONS at any one time or damage to pump may occur. WARNING: If ignition or flame failure is experienced, discontinue use of burner at once by turning burner switch off. Have cause of failure corrected by an authorized service technician. After corrections are made, refer to OPERATION for start-up instructions. 1. 2. 3. 4. 5. Connect electrical cord and test GFCI device. Turn on water supply. Turn on gas supply. Grasp wand firmly. Turn on pump switch.
Storage DANGER: Do not store flammable liquids (gasoline, diesel fuel, solvents, etc.) near pressure washer, or in non-ventilated areas. MAINTENANCE Pump Motor On a yearly basis, oil pump motor per instructions on motor nameplate. NOTE: Some motors may be equipped with permanently lubricated bearings and will not require additional lubrication. Gas Burner It is recommended that the gas burner be serviced yearly or as needed. Contact your local service center.
Troubleshooting Guide PRESSURE WASHER TROUBLESHOOTING SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION PRESSURE WASHER WILL NOT RUN. Pump switch in OFF position. Place switch in ON position. Electric plug not fully inserted into wall receptacle. Insert plug fully into known working receptacle. GFCI tripped. Reset GFCI. Refer to instructions on GFCI. Fuse blown or circuit breaker tripped in electrical supply line. Replace fuse or reset circuit breaker. Use only circuits of adequate capacity.
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION BURNER WILL NOT IGNITE WHEN TRIGGER GUN IS OPEN Burner switch is off. Turn switch on. Loose electrical connections. Tighten electrical connection. Gas valve off. Turn gas valve on. Pressure switch not operative. Test pressure switch and replace if defective. Manual valve on gas supply line is closed. Open valve. Low service supply pressure.
WHAT THIS WARRANTY COVERS All Hotsy pressure washers are warranted by Hotsy to the original purchaser to be free from defects in materials and workmanship under normal use, for the periods specified below. This Limited Warranty is subject to the exclusions shown below, is calculated from the date of the original purchase, and applies to the original components only. Any parts replaced under this warranty will assume the remainder of the part’s warranty period.
If you are looking for replacement parts for your Hotsy, please contact your local dealer. You can find a dealer by calling Hotsy at 800-525-1976 or by visiting www.hotsy.com.
Form # 8.941-246.0 • Revised 12/10 • Printed in U.S.A.
