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SDW275S6BN shown above
Manual 238-48244-00A 11/09
EcoStor2
™
Gas Water Heaters
SERVICE
MANUAL
SUPPLEMENT
Solar
Troubleshooting Guide
and Instructions for Service
(To be performed ONLY by
qualified service providers)
Models Covered
by This Manual:
SDW2504T*F(BN,SX)
SDW265T*F(BN,SX)
SDW275S*(BN,SX)
SDW2TW50T*F(BN,SX)
SDW2TW65T*F(BN,SX)
SDW2TW75T*(BN,SX)
(*) Denotes Warranty Years
Save this manual for future reference
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Summary of Contents for Bradford White ECOSTOR2 SDW2504T
- Page 1 SDW275S6BN shown above Manual 238-48244-00A 11/09 EcoStor2 Solar ™ Gas Water Heaters SERVICE MANUAL SUPPLEMENT Troubleshooting Guide and Instructions for Service (To be performed ONLY by qualified service providers) Models Covered by This Manual: SDW2504T*F(BN,SX) SDW265T*F(BN,SX) SDW275S*(BN,SX) SDW2TW50T*F(BN,SX) SDW2TW65T*F(BN,SX) SDW2TW75T*(BN,SX) (*) Denotes Warranty Years Save this manual for future reference...
- Page 2 How to use this manual Introduction Thermistor Wiring Thermistor Wiring Test Procedure Gas Control Temperature Sensor Temperature Sensor and Harness Testing Temperature Sensor Measurement Solar Thermal Troubleshooting Solar Thermal Parts List (Atmospheric) Solar Thermal Parts List (Ultra Low NOx) Solar Thermal Parts List (TTW) Notes The Bradford White EcoStor2™...
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Page 3: How To Use This Manual
This manual serves as a water heater supplement to service and troubleshoot specifically the solar features of the water heater. Please refer to the table below to determine which base model service manual is appropriate for the non-solar features of the water heater. - Page 4 temperature.
- Page 5 3. Solar Thermistor Wiring The solar with gas backup water heater comes provided with two sets of twisted thermistor wiring. They are color coded for ease of use.
- Page 6 If the wiring cannot be fixed, the wiring for the thermistor may have to be ran on the outside of the water heater. Replace the wiring, and reconnect it to the solar control. Turn on the power to the solar control.
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Page 7: Gas Control
This allows the solar thermal heating system to maximize the ability to heat the water inside the tank. Only when the upper portion of the water heater tank reaches the water temperature to turn on the gas control, does the backup heat begin. - Page 8 “OFF” position. Then follow the lighting instructions and return the gas control knob to the desired setpoint. Observe the water heater operation. If the gas control continues to lockout due to excessive tank temperature, proceed to thermal sensor and harness testing to determine the cause.
- Page 9 Prior to draw- ing water from drain valve, turn off the cold water supply to the water heater. This will prevent cold water flow into the tank affecting the resistance value of the temperature sensor.
- Page 10 EcoStor2™ Solar This troubleshooting chart serves as a water heater supplement to troubleshoot specifically the solar features of the water heater. Please refer to page 3 to determine which base model service manual is appropriate for the non-solar troubleshooting chart for the water heater.
- Page 11 EcoStor2™ Solar Thermostat Sensor Wire Harness Solar Sensor Wire Harness Burner Assembly Complete Burner Main Burner Orifice Pilot Assembly Pilot Orifice Solar Thermal Parts List (Atmospheric) Draft Hood Hex Head Anode Aluminum Heat Trap Insert Hot Water Outlet Anode Aluminum Cold Water Inlet Polysulfone (NC Code) Flue Baffle Complete Junction Box Cover...
- Page 12 EcoStor2™ Solar Inner Door Gasket Kit ASSE Approved Mixing Valve (Optional) Universal Integrated Mixing Device Kit (IMD) Burner Assembly Manifold Mount Orifice Flexible Gas Feedline Resettable Thermal Switch Burner Pilot Assembly Kit Screw-#8-18 X 1/2 TEK Solar Thermal Parts List (Ultra Low NOx) Pilot Orifice Thermopile Kit...
- Page 13 EcoStor2™ Solar Inner Door Gasket Kit ASSE Approved Mixing Valve (Optional) Universal Integrated Mixing Device Kit (IMD) Thermostat Sensor Wire Harness Solar Sensor Wire Harness Solar Thermal Parts List Burner Assembly Complete Burner Main Burner Orifice Pilot Assembly Pilot Orifice (TTW) Blower Complete Air Mixing Inlet...
- Page 14 NOTES...
- Page 15 NOTES...
- Page 16 Email parts@bradfordwhite.com techserv@bradfordwhite.com www.bradfordwhite.com...