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Firman WH03662OF Operator's Manual
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Firman WH03662OF Operator's Manual

Dual fuel inverter generator
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OPERATOR'S MANUAL
DUAL FUEL INVERTER GENERATOR
MODEL NUMBER
WH03662OF
Rev Level:00
Record product information to reference when ordering parts or
obtaining warranty coverage.
P/N:336745482 Rev:02

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Summary of Contents for Firman WH03662OF

  • Page 1 OPERATOR’S MANUAL DUAL FUEL INVERTER GENERATOR MODEL NUMBER WH03662OF Rev Level:00 Record product information to reference when ordering parts or obtaining warranty coverage. P/N:336745482 Rev:02...
  • Page 2 NOTE: The FIRMAN WH03662OF inverter generator has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.

  • Page 3: Table Of Contents

    Register your FIRMAN generator online at www.firmanpowerequipment.com INTRODUCTION Thank you for purchasing a FIRMAN generator. You have selected a high-quality, precision engineered generator set designed and tested to give you years of satisfactory service. This generator is Dual Fuel and capable of running on gasoline and liquid petroleum gas (LPG). This generator is not intended to be run unattended or to supply power to life safety support.

  • Page 4: Introduction

    INTRODUCTION SIGNAL WORDS DANGER WARNING CAUTION NOTICE Indicates a hazard Indicates a hazard Indicates information Indicates a hazard which, if not avoided, considered Important, which, if not avoided, which, if not avoided, could result in minor or but not hazard-related. will result in death or could result in death moderate injury.
  • Page 5 NOTICE If you have questions about intended use, contact FIRMAN customer service. This inverter generator is designed to be used only with FIRMAN authorized parts. System Ground The generator neutral is floating, which means that the AC stator winding is isolated from the grounding fastener and the AC receptacle ground pins.
  • Page 6 INTRODUCTION 1. Only use grounded cords marked for outdoor use rated for your loads. To provide power using extension cords Minimum Gauge, Outdoor Rated Total Amperage Up to 50 FT (15m) Up to 13A Up to 15A Up to 20A Up to 30A 2.

  • Page 7: Features And Controls

    FEATURES AND CONTROLS ② ① ③ ⑯ ④ ⑮ ⑤ ⑭ ⑥ ⑦ ⑫ ⑧ ⑬ ⑪ ⑩ ⑨ 6.0 Gallon(23L) Capacity 10- Battery Fuel Tank 11- Accessory Box- Parallel Cable Fuel Cap 12- Adapter L5-30 to TT-30 Fuel Gauge 13- 9.0"(23cm) Flat Free Wheel Bottle Opener 14- Outlet Cover...
  • Page 8 FEATURES AND CONTROLS ⑧ English Customer Service: 1-844-FIRMAN1...
  • Page 9 FEATURES AND CONTROLS English Customer Service: 1-844-FIRMAN1...
  • Page 10 FEATURES AND CONTROLS ⑧ English Customer Service: 1-844-FIRMAN1...
  • Page 11 FEATURES AND CONTROLS Control Panel 5 6 7 NOTICE Total power drawn from all receptacles must not exceed the name plate rating. 1. Engine Start Switch – To start engine, press and hold the switch in the START (ll) position, the engine will crank and attempt to start.
  • Page 12 14. 120V, 50A RV – NEMA 14-50R (Not for 240V use) A maximum of 30.4 Amps current may be drawn from this receptacle. 15. Parallel Operation Outlets - These outlets are used for connecting two FIRMAN inverter generators for parallel operation. A FIRMAN parallel kit(optional equipment) is required for parallel operation.

  • Page 13: Operation

    OPERATION 1.Location DANGER! Engine exhaust contains carbon monoxide, a poisonous gas that could kill you in minutes. You CANNOT smell it, see it, or taste it. Even if you do not smell exhaust fumes, you could still be exposed to carbon monoxide gas. •...
  • Page 14 OPERATION Reduce Risk of Fire WARNING! Exhaust heat/gases could ignite combustibles, structures or damage fuel tank causing a fire, resulting in death or serious injury. • Keep portable generator at least 5 ft. (1.5 m) from any structure, trees or vegetation over 12 in.
  • Page 15 2. Oil and Gasoline/LPG Add Engine Oil We recommend using FIRMAN SAE 10W-30 API SJ oil for best performance. Other high-quality detergent oils (API SJ or higher) are acceptable. Do not use special additives. Ambient temperature determines the proper oil viscosity for the engine. Use the chart to select the proper oil for the outdoor temperature range expected.
  • Page 16 Make sure the sump is completely full of oil to the upper limit (H). Do not operate engine until oil level issue is corrected. Contact Firman customer service. Add Gasoline WARNING! Fuel and its vapors are extremely flammable which could cause burns or fire resulting in death or serious injury.
  • Page 17 High altitude may cause hard starting, increased fuel consumption and sparkplug fouling. To operate at high altitudes FIRMAN can provide a high altitude carburetor main jet. The alternative main jet and installation instructions can be obtained by contacting Customer Support.
  • Page 18 OPERATION Connecting LPG Fuel WARNING! Liquid Petroleum gas (LPG) is extremely flammable which could cause burns or fire resulting in death or serious injury. • The fuel supply line must always be shut off when the engine is not running. Failure to shut off fuel may allow fuel to leak at the generator.
  • Page 19 OPERATION Indicator light - Battery Power Saving Mode This generator is equipped with an electronic module which consumes battery power. When the main fuel selector switch is turned to the GAS or LPG position, the indicator light will turn RED for up to 4 minutes (before going off). Starting the engine successfully anytime during the 4 minutes will turn the indicator light OFF.
  • Page 20 OPERATION NOTICE When the main fuel selector switch is turned to the GAS position, the indicator light will turn RED for up to 4 minutes (before going off). Starting the engine successfully anytime during the 4 minutes will turn the indicator light OFF. See Indicator light-Battery Power Saving Mode section for more information.
  • Page 21 OPERATION 4.Starting the Generator on LPG 1. Before starting the generator, check for loose or missing parts and for any damage which may have occurred during shipment. Ensure spark plug, muffler, fuel cap, and air cleaner are all in place. 2.
  • Page 22 OPERATION 7. Pull the choke knob out to the “START” position.(For electric start move to step (11)) 8. For recoil start only - PULL-TO-PRIME Pull the starter cord 1-2 times. Pull slowly until resistance if felt and then pull rapidly. 9.For recoil start only - Move the choke knob to the “RUN”...
  • Page 23 OPERATION 12. For electric start only - Move the choke knob to the RUN position. 13. Allow portable generator to run at no load for a few minutes to stabilize before plugging in any electrical devices. NOTICE If engine starts but fails to run, or if portable generator shuts down during operation, check oil level.
  • Page 24 OPERATION 5. Connecting Electrical Loads This inverter generator has been pretested and adjusted to handle its full capacity. WARNING! Generator voltage could cause electrical shock or burn resulting in death or serious injury. • Damaged or overloaded extension cords could overheat, arc, and burn resulting death or serious injury.
  • Page 25 OPERATION Economy Control Switch The Economy Control switch can be activated in order to minimize fuel consumption and noise while operating the unit during times of reduced electrical output, allowing the engine speed to idle during periods of non-use. The engine speed returns to normal when an electrical load is connected.
  • Page 26 OPERATION 5. Stopping the generator 1. Turn off and remove all electrical loads. Never stop the generator with electrical devices plugged in and turned on. Never stop the engine by moving the choke to the start position. Let the generator run at no-load for one minute to stabilize internal temperatures of the engine and generator.
  • Page 27 Any two FIRMAN inverter generators with parallel ports, including two FIRMAN inverters model WH03662OF can be paralleled to increase the total available electrical power to 6000 Watts. A FIRMAN Parallel kit (not included) is required for parallel operation. For Kit availability, call customer Service at 1-844- 347-6261 or visit: www.firmanpowerequipment.com.

  • Page 28: Maintenance - Storage

    Maintenance - Storage MAINTENANCE SCHEDULE Every Daily(Before Initial Every Every 100 hours ITEM NOTES operation) 25 hours 50 hours 250 hours (or annual) Check condition. Adjust gap √ Spark Plug and clean. Replace if necessary. Check oil level. √ Engine Oil Replace.
  • Page 29 (b) Reinstall the drain plug and fill the engine with oil until it reaches the HIGH(H) level on the oil filler dipstick. DRAIN PLUG NOTICE We recommend using FIRMAN SAE 10W-30 API SJ oil for best performance. Other high- quality detergent oils (API SJ or higher) are acceptable. See Oil and Gasoline / LPG. English...
  • Page 30 Maintenance - Storage Air Filter Maintenance (a) Carefully remove foam air filter element and wash it with liquid detergent and water only. Squeeze dry in a clean cloth. (b) Saturate foam air filter element with clean engine oil and squeeze in a clean cloth to remove excess oil.
  • Page 31 (d-1) For spark plug FIRMAN P/N 330723001 - Adjust the electrode gap to 0.020 - 0.024 in. ( 0.5 - 0.6 mm). (d-2) For spark plug CHAMPION N9YC - Adjust the electrode gap to 0.028 - 0.031 in. ( 0.7 - 0.8 mm).
  • Page 32 3. Carefully remove the carbon deposits from the spark arrester screen with a wire brush. 4. Replace the spark arrester if it is damaged. If replacement parts are required, make sure to use only FIRMAN original equipment replacement parts. 5. Position the spark arrester in the muffler and attach with the screws.
  • Page 33 Maintenance - Storage Battery Replacement A(M6X12) 1. Remove the spark plug wire from spark plug. 2. Remove the nut and bolt from the negative(-) and positive(+) posts. 3. Loosen and remove the screw A on the battery holding bracket. 4. Remove the battery and recycle and dispose of properly. 5.
  • Page 34 Maintenance - Storage Long Term Storage It is important to prevent gum deposits from forming in essential fuel system components such as the carburetor, fuel hoses or tank during storage. Ethanol-blended fuels (called gasohol, ethanol or methanol) attract moisture, which leads to separation and formation of acids during storage. Acidic gas can damage the fuel system of an engine while in storage.

  • Page 35: Troubleshooting- Specifications

    2. Dirty air cleaner. Engine shuts down when 3. Fill crankcase to proper level or place. 3. Low oil level. running. generator on level surface. For all other issues, contact authorized dealer or Firman customer service. English Customer Service: 1-844-FIRMAN1...
  • Page 36 Troubleshooting – Specifications SPECIFICATIONS Model WH03662OF Starting Watts 4500(GASOLINE)/4100(LPG) Running Watts* 3650(GAS OLINE )/3300(LPG) Rated AC Voltage 120V Rated Fequency 60Hz Phase Single Voltage Regulator Digital Power Factor <3% Total Harmonic Distortion(THD) Magneto Inductor Alternator Type Engine FIRMAN Engine Type...
  • Page 37 PARTS DIAGRAM AND PART LIST WH03662OF PARTS DIAGRAM English Customer Service: 1-844-FIRMAN1...
  • Page 38 208cc ENGINE PARTS DIAGRAM English Customer Service: 1-844-FIRMAN1...

  • Page 39: Parts Diagrams - Parts Lists - Wiring Diagram

    Parts Diagrams - Parts Lists - Wiring Diagram WH03662OF Portable Generator Qty. Qty. NO. Part Number Description NO. Part Number Description 330713574 Rectifier 336718366 Flange Bolt M6×35 Dual Fuel Module 336713817 336713561 Flange Bolt M6×25 330713651 Charger 336728304 Inverter Cover I 330713542 Flange Bolt M5×14...
  • Page 40 Parts Diagrams - Parts Lists - Wiring Diagram FIRMAN 208cc Engine Description Qty. Description Qty. NO. Part Number NO. Part Number 336718329 Flange Bolt M6×15 336723545 Washer,drain Bolt 357723577 Grip,starter 336723610 Locating Pins 336728300 Handle Core 336718310 Flange Bolt M6×25...
  • Page 41 Parts Diagrams - Parts Lists - Wiring Diagram Qty. NO. Part Number Description 317713516 Bolt M4×14 Step Moter Assy 330723589 380713542 Bolt M3×6 336723605 Step Moter Cover Gasket, Air Cleaner 336723554 336418316 Choke Lever Bracket Assy 336418316 Air Cleaner Set 100.1 336723557 Elbow, Air Cleaner...
  • Page 42 Parts Diagrams - Parts Lists - Wiring Diagram Wiring Diagram English Customer Service: 1-844-FIRMAN1...

  • Page 43: Service - Warranty

    FIRMAN GENERATOR will register the warranty upon receipt of your Warranty Registration Card and a copy of your sales receipt from one of FIRMAN’s retail locations as proof of purchase. Please submit your warranty registration and your proof of purchase within ten(10) days of the date of purchase.
  • Page 44 Limits of Implied Warranty and Consequential Damage FIRMAN disclaims any obligation to cover any loss of time, use of this product, freight, or any incidental or consequential claim by anyone from using this product. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANT ABLILITY OR FITNESS FOR A PARTICULAR PURPOSE.
  • Page 45 If any such part fails during the period of warranty coverage, the part will be repaired or replaced by FIRMAN at no charge to the owner. Any such part repaired or replaced under the warranty will be warranted for the remaining warranty period.
  • Page 46 Service – Warranty (8) Throughout the emissions warranty period defined in Subsection (b)(2), FIRMAN will maintain a supply of warranted parts sufficient to meet the expected demand for such parts. (9) Any replacement part may be used in the performance of any warranty maintenance or repairs and must be provided without charge to the owner.
  • Page 47 FIRMAN POWER EQUIPMENT INC. 8716 W. LUDLOW DR. SUITE 6 PEORIA, AZ 85381 All rights reserved. Any reprinting or unauthorized use 1-844-347-6261 without the written permission is expressly prohibited. WWW.FIRMANPOWEREQUIPMENT.COM P/N:336745482 Rev:02...