Instruction/ maintenance manual of the product 921 White Rodgers
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Do not use this Natural Gas control on LP Gas water heater . Improper operation could occur , resulting in personal injury and/or death due to Carbon Mono xide (CO) poisoning, fire, or explosion. Check for proper gas type as listed on the rating plate affixed to the water heater .
2 SPECIFICA TION ELECTRICAL RA TINGS: Input and Frequency: 120 V AC , 60 Hz Output Ratings: Ignitor Load: 2 Amps maximum Inducer Draft Motor: 3 Amps Full Load, 4 Amps Lock ed Rotor Current: 0.2 Amps @ 120 V A C Range of Regulation (Btu/Hr) Minimum: 30,000 Maximum: 150,000 Pressure Regulator Setting: F actor y set to 3.
3 GROUND JO IN T UNION IN TE LLI-VE NT ™ CONTROL GAS SUPPL Y PI PE TE E DRIP LE G (SEDIMET TR AP ) 3" MINIMU M (M ANDA TO RY ) PIPE CA P SHUT -O FF VALV E d. Check all ne w water piping f or leaks. Repair as needed. 8. Open the gas shutoff valv e.
4 TEMPERATURE INDICATORS TEMPERATURE ADJUSTMENT BUTTONS b . T o increase the temperature press and release the HO TTER button once. The temper ature indicators will now displa y the new temperature setting. Press and release the HO TTER button until you ha ve reached the desired setting.
5 They are the people most commonly hurt in scald injur ies and in need of lower temper ature and other protection like super vision, point-of-use temperature control equipment or a system mixing valv e. A point-of-use v alve or system mixing valv e can be obtained from your local plumber .
6 A typical system wiring diagram is shown belo w . Use the water heater manuf acturer’ s wir ing diagram f or details of the installation. Alwa ys follo w the instructions supplied with the water heater , and those of the water heater man uf acturer .
7 SEQUENCE OF OPERA TIONS APPLY POWER TO APPLIA NC E IS FIELD WIRING CORRECT? DISPLAY ERROR CODE 1 OR 2 NO YES REQUEST FOR HEAT PRESENT? NO IS PRESSURE SWITCH PROVEN OPEN WITHIN 5 SECONDS? YES NO COMB.
8 Error Indication Check, Repair , or Replace A B C 1 An open ear th ground cir- cuit to the ignition system 1. Check that the earth ground conductor is properly connected at the fuse bo x or breaker panel and the water heater . 2. Check that the g rounding conductors on the water heater are properly connected and secure.
TROUBLESHOO TING A B C 7 The self diagnostic test f ound a problem with the gas valv e driver circuit 1. Cycle power to the w ater heater off for 10 seconds and then back on.
10 NO TES.
11 NO TES.
www .white-rodgers.com www .emersonclimate.com White-Rodgers is a division of Emerson Electric Co. The Emerson logo is a trademark and service mar k of Emerson Electric Co.
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If you already are a holder of White Rodgers 921, 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 White Rodgers 921.
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