White Rodgers 921 manual

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Table of contents for the manual

  • Page 1

    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 . “WHA T T O DO IF Y OU SMELL GAS” • Do not try to light an[...]

  • Page 2

    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 3.5” or 4.0” W .C. Adjustabl[...]

  • Page 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. 9. BEFORE TURNING ON THE APPLIANCE, CHECK THE GAS LINES FOR LEAKS. a. Use a soapy w ater soluti[...]

  • Page 4

    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. HOLDING DO WN THE BUTT ON WILL NO T CONTINUE TO RAISE THE SET[...]

  • Page 5

    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 . Checking the temper ature setpoint ma y be perf ormed at a[...]

  • Page 6

    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 . HIGH LIMIT SWITCH AIR PRESSURE SWITCH COMBUSTION BLOWER BLACK WHITE GREEN TO POWER SUPPLY DISCO[...]

  • Page 7

    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 COMBUSTION BLOWER ON YES IS PRESSURE SWITCH PROVEN CLO SE D WITHIN 5 SECONDS? NO WAIT FOR PRESSURE SWITCH TO OPEN DISPLAY ER RO R NUMBER 3 WAIT FOR PRESSU[...]

  • Page 8

    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. A B C 2 The self diagnosti[...]

  • Page 9

    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. 2. If the abov e step did not cleat the error , the INTEL- LI-VENT™ control must be replaced A B C 8 The self diagnostic test has detected a problem with the internal microc[...]

  • Page 10

    10 NO TES[...]

  • Page 11

    11 NO TES[...]

  • Page 12

    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.[...]