Instruction/ maintenance manual of the product SDW2TW75T Bradford-White Corp
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Save this manual for future reference Manual 238-48244-00A 11/09 SERVICE MANUAL SUPPLEMENT Troubleshooting Guide and Instructions for Service (To be performed ONLY by qua lified servi ce providers) Mo.
2 The Bradford White EcoS tor2™ Solar Gas W ater Heaters T able of Contents P a g e Service P rocedure How to use this manual 3 - - - Introduction 4 - - - Thermistor Wiring 5 - - - Thermistor Wiring.
3 It is intended for this manual to be used by qualified service personnel for the primary purpose of troubleshooting and repair of the Bradford White EcoStor2™ Solar with Gas Backup Water Heaters. Understanding the solar thermal sequence of operation section of this manual will contribute greatly to troubleshooting the water heater.
4 The Bradford White EcoS tor2 Solar W ater Heater System The new Bradford White Solar with Gas Backup water heaters are designed to provide reliable performance with enhanced standard features.
5 This section is intended to provide a better understanding of the solar thermal design application and how it varies from the base model listed on page 3. Solar Thermistor Wiring The solar with gas backup water heater comes provided with two sets of twisted thermistor wiring.
6 Thermistor Wire T esting Step 1. Disconnect and unplug the solar control. Step 2. Disconnect the thermistor twisted pair from the control or control sensor wiring. Step 3. Connect a multimeter set to read ohms to the twisted wire stripped ends. Determine the resistance value of the attached thermistor.
7 The solar with gas backup water heater senses temperature from the upper portion of the tank. 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.
8 EcoS tor2™ Solar CAUTION DO NOT use standard multimeter probes for this test. Doin g so will damage connector. Use special pin type electronic probes or small diameter wire pi ns inserted into connector.
9 DETERMINE THE WATER TEMPERATURE INSIDE THE STORAGE TANK EcoS tor2™ Solar ° F 01 23456789 40 26109 25400 247 12 24045 23399 22771 22163 21573 21000 20445 50 19906 19383 188 76 18383 17905 17440 16.
10 EcoS tor2™ 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.
11 EcoS tor2™ Solar 29 Thermostat Sensor Wire Harness 30 Solar Sensor Wire Harness 31 Burner A ssembly C omplete 32 Burner 33 Main Burner Orifice 34 Pilot A ssembly 35 Pilot O rifice 1 Draft H ood 2.
12 EcoS tor2™ Solar 1 Draft D iverter 2 Hex Head Anode (Aluminum) 3 Heat Trap Insert 4 Hot Water Outlet Anode (Aluminum) 5 Cold Water Inlet Polysulfone (N C Code) 6 Flue Baffle 7 Junction Box Cover .
13 EcoS tor2™ Solar Solar Thermal Parts List (TTW) 34 Inner Door Gasket Kit 35 ASSE Approved Mixing Valve (Optional) 36 Universal Integrated Mixing Device Kit (IMD) 37 Thermostat Sensor Wire Harness.
NOTES 14.
NOTES 15.
Email parts@bradfordwhite.com techserv@bradfordwhite.com www .bradfordwhite.com.
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If you already are a holder of Bradford-White Corp SDW2TW75T, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bradford-White Corp SDW2TW75T.
However, one of the most important roles played by the user manual is to help in solving problems with Bradford-White Corp SDW2TW75T. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bradford-White Corp SDW2TW75T along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
