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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.

CSA Approved

Girard Products LLC, 1361 Calle Avanazado, San Clemente CA 92673 U.S.A

Service Manual Part No. 1GWH9405 • 9/7/2010

Patent Pending

Summary of Contents for GSWH-1

Page 1: ...ed 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 136...

Page 2: ...Equipment 6 5 Removing Controls Housing 7 6 Schematics and Diagrams a Ladder Diagram 8 b Wiring Diagram 9 7 Circuit Board Operation 10 8 Exploded View 12 9 Troubleshooting Guide 12 10 Circuit Board Tr...

Page 3: ...ht 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 WCI Min to 14 WCI Max Manifo...

Page 4: ...properly installed in a Recreation Vehicle the Girard Tankless Water Heater is connected to The RV s cold water system with its water input from a pressurized 45 psi source such as a shore connection...

Page 5: ...decrease the flow which results in hotter water to obtain the temperature desired Note although the Girard tankless water heater is instantaneous the water in the system pipes must be purged before th...

Page 6: ...ls and or equipment are needed to service the Girard Tankless Water Heater The following equipment is commonly used for service and is readily available Be sure that all instruments are regularly cali...

Page 7: ...owing equipment is commonly used for service and is readily available Be sure that all instruments are regularly calibrated To gain easy access to the serviceable components of the Water Heater you mu...

Page 8: ...ing careful not to damage the tube Set aside for re assembly 5 Lean the Controls Housing to the right to slip it out of the wing nut s post and lift it to clear the bottom posts 6 Remove the assembly...

Page 9: ...functional understanding of the electrical components and of the Circuit Board control functions Wiring Diagram Cold Hot Heat Exchanger GasValve 12VDC Red 12VDC Ground Black Ground Green Gas Valve Br...

Page 10: ...rcuit Board indicating that there is sufficient air flow for combustion The circuit is now complete Try For Ignition TFI The Circuit Board is now ready to try for ignition and applies power to the gas...

Page 11: ...the control will make two more attempts to relight and then go into lockout See Try for Ignition page 10 If flame is established Combustion Airflow Problems If the airflow signal is lost or the ECO o...

Page 12: ...urner Auto Lo Thermostat Gas Control Valve Anti Freeze Thermostat Burner Manifold Power Switch Control Panel Housing Door Flange Door Figure 7 EXPLODED VIEW OF MODEL GSWH 1 AND MAJOR COMPONENTS IDENTI...

Page 13: ...CO d Check Wiring to Board e Defective or Stuck Flow Switch Tap with Wrench If Problem not Solved Replace Flow Switch f Bad circuit board CONFIRM with Approved Board Tester such as Fenwal part 05 0802...

Page 14: ...ester such as Fenwal part 05 080224 009 Replace 2 No Spark and No Gas Blower Operating a Low voltage Correct Power Supply Minimum 10 5 VDC b Check for Flow of Water c Check Relay d Check ECO e Check f...

Page 15: ...lete Ignition of Burner Blades through Sight Hole Remove any Obstructions f Partially Obstructed Burner Manifold Clean Burner Orifices Replace if Necessary g Dirty Connector on Circuit Board Clean Edg...

Page 16: ...ols remove any item present and wipe clean the bottom of the housing 5 Inspect the interior surface of the housing for any cracks or corroded areas that could allow penetration of gases into the inter...

Page 17: ...ning water RV Anti freeze Method Follow the recommendations of the Recreation Vehicle manufacturer and fill the system with a non toxic anti freeze Make sure that the antifreeze flows from each tap to...

Page 18: ...Switch 40 24 Cold Water Inlet Manifold Assembly 30 18 ECO 10 6 Sail Switch 20 12 Relay 30 18 Power On Off Switch 10 6 Mode Switch Hi Low Burner 10 6 Diagnostic LED 10 6 Winter Use Control Unit 30 18...

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