Girard Products GSWH-1 Service Manual
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Girard Products GSWH-1 Service Manual

Lp gas tankless water heater
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See also: Owner's Manual , Installation Manual
Service Manual
Model: GSWH-1
LP Gas
Tankless
Water Heater
For Recreation Vehicles
This manual is intended solely for use by trained personnel who
perform service or repairs on the Model GSWH-1 Water Heater
on behalf of a Girard Products LLC Authorized Service Center.
Girard Products LLC, 1361 Calle Avanazado, San Clemente CA 92673 U.S.A
Service Manual Part No. 1GWH9405 • 9/7/2010
CSA Approved
Patent Pending

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Summary of Contents for Girard Products GSWH-1

  • Page 1 Water Heater For Recreation Vehicles This manual is intended solely for use by trained personnel who perform service or repairs on the Model GSWH-1 Water Heater on behalf of a Girard Products LLC Authorized Service Center. CSA Approved Girard Products LLC, 1361 Calle Avanazado, San Clemente CA 92673 U.S.A Service Manual Part No.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Service Manual - Model GSWH-1 Title Page Product Identification ..................... 3 Description and Features..................4 Normal Operation ....................5 Recommended Tools and Equipment................ 6 Removing Controls Housing ..................7 Schematics and Diagrams a. Ladder Diagram....................8 b. Wiring Diagram ....................9 Circuit Board Operation ..................10...

  • Page 3: Product Identification

    Door Part Number: 1GWHD Serial Number Location: On Rating Label affixed on the inside right of the Controls Housing. Figure 1 Specifications The main performance specifications of the Model GSWH-1 are: BTU/HR 27,000 – 34,000 Fuel Propane (LP Gas) Inlet Pressure 10.5”...

  • Page 4: Description And Features

    DESCRIPTION AND FEATURES The Girard Products GSWH-1 LP Gas Tankless Water Heater is designed to meet ANSI Z21.10.3- 2004 and CSA 4.3-2004 and is certified by the Canadian Standards Association (CSA) to meet these standards for use in recreation vehicles.

  • Page 5: Normal Operation

    The gas control valve of the GSWH-1 and the GSWHAF-1 features a dual BTU solenoid that can operate in ‘High’ mode (34,000 BTUs) or ‘Low’ mode (27,000 BTUs) depending on the input temperature of the cold water.

  • Page 6: Recommended Tools And Equipment

    .75gpm or less .to reach an output temperature above 100 ºF. If the input water temperature is approximately 60ºF or greater, the model GSWH-1 will generate output water in the range of 95 °F to 120 °F depending on the water flow.

  • Page 7: Removing Controls Housing

    Hand Tools: • Phillips and flat head screw drivers • 9/16”, 3/4” and 13/16” S.A.E. open wrenches • 7mm and 5.5mm nut drivers and/or wrenches. • Needle nose pliers, wire crimp and cutter. • Leak Test Solution. REMOVING CONTROLS’ HOUSING No unusual tools and/or equipment are needed to service the Girard Tankless Water Heater.

  • Page 8: Schematics And Diagrams

    SCHEMATICS AND DIAGRAMS The following schematics and diagrams will help to provide a better understanding of the operation of the Model GSWH-1 Water Heater and to trouble shoot the most common malfunctions. Figure 4 P a g e...

  • Page 9: Wiring Diagram

    Please refer to the electrical diagram for a functional understanding of the electrical components and of the Circuit Board control functions. Wiring Diagram Figure 5 P a g e...

  • Page 10: Circuit Board Operation

    CIRCUIT BOARD OPERATION When the user opens a Hot Water faucet, water starts flowing through the unit and activates the Flow Switch which in turn activates the Relay; this applies 12VDC power to the ECO (Emergency Cut-Off Thermostat) and to the “Heat Demand” Connection (5) of the Circuit Board (see below). Change to: ….ECO (Emergency Cut-Off Thermostat) and to the ‘TH’...
  • Page 11 Whenever the Circuit Board senses flame during the ignition trials, sparking stops and the Gas Valve remains energized. The Water Flow Switch, the Sail Switch and the Burner flame are constantly monitored to assure that the system continues to operate properly. When the Hot Water faucet is closed and the Flow Switch opens, the demand for heat ends and the Gas Valve is de-energized immediately;...

  • Page 12: Exploded View

    TROUBLE SHOOTING GUIDE This section includes the most common symptoms that may be found in a model GSWH-1 that is not operating normally. Please refer to the following drawing to locate the components in the unit: Limit Switch Blower Motor Assembly Support...

  • Page 13: Circuit Board Troubleshooting

    CIRCUIT BOARD TROUBLESHOOTING The Circuit Board is the electronic controller for the Water Heater. It is very reliable but it is often diagnosed improperly and replaced. Note: in all cases the replacement of the Circuit Board is the last item. We provide here a list of symptoms and their possible causes to help you to determine if the problem is due to a malfunction of the board or other components.

  • Page 14: General Failures And Possible Causes And Remedies

    6. Flame okay during trial for ignition (TFI), no flame sense (after TFI) a. Check Electrode and High Voltage Wire for Continuity b. Poor ground at burner c. Bad circuit board (check flame current); CONFIRM with Approved Board Tester such as Fenwal part # 05-080224-009) - Replace GENERAL FAILURES AND POSSIBLE CAUSES AND REMEDIES 1.
  • Page 15 4. Water Heater Lockout – Gas present but no Spark a. High Tension Lead Wire Loose: Secure Wire Connection on Circuit Board b. Poor Ground Connection at Burner: Secure Ground Connection to Main Burner c. Improper Electrode Gapping: Re-position Spark Gap Between Electrode Tip and Burner Blade to 1/8˝...

  • Page 16: Routine Maintenance

    ROUTINE MAINTENANCE We recommend that the GSWH-1 water heater be inspected regularly by the user and at least once a year by a qualified service technician. Before an inspection make sure that the LP Gas and Water supply are connected and turned on.

  • Page 17: Winterization

    1GWH6700 Door Assembly 1GWH4400 Door Flange 1GWH4300 Flue Exhaust tube 1GWH4700 Winter Use Device for GSWH-1 (Aftermarket) 1GWH9404 Conversion Flange for Atwood 6 Gallon Polar White 1GWHDA6 Conversion Flange for Atwood or Suburban 10 Gallon Polar White 1GWHDAS10 Figure 10...

  • Page 18: Flat Rate Schedule

    • For any component replacement that does not appear on the above list, contact Girard Products LLC for authorization and instructions. • To process a warranty claim the Service Center must be an authorized Girard Products, LLC Service Center. • Authorized Service Centers must obtain prior approval for work that exceeds the flat rate time allowances.

  • Page 19: Limited Warranty (2 Years)

    1. For a period of two years from the date of purchase, Girard Products will replace any parts that are found defective and will pay a warranty service allowance directly to the recommended Girard Products Water Heater Service Center at rates mutually agreed upon between Girard Products and its recommended service centers.

  • Page 20: Service Procedures

    PRODUCTS, LLC; SUCH PAYMENTS WILL NOT BE REIMBURSED. Be sure to provide purchase documentation regarding your Girard Water Heater. This Girard Products Water Heater is designed for use in recreation vehicles for the purpose of heating water as stated in the “rating plate” attached to the water heater. Any other use, unless authorized in writing by the Girard Products Engineering Department, voids this warranty.

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