A.O. Smith GB/GW-500 manual

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Table of contents for the manual

  • Page 1

    1 LIGHTING INSTRUCTIONS These models have an automatic hot surface ignition system mounted on the combustion chamber panel inside the front jacket. This hot surface igniter ignites the main burner gas whenever the system control calls for heat. Before proceeding with operation of the unit, make sure the boiler and system are filled with water and a[...]

  • Page 2

    2 Lighting Instructions for the G(B/W) 200 through 500 models THE UNIT SHOULD NOT BE INST ALLED DIRECTL Y ON A CARPETED FLOOR. A FIRE HAZARD MA Y RESUL T . Instead, the boiler must be installed on the A. O. Smith Combustible Floor Kit Base or concrete blocks extending beyond the full width and depth of the boiler by at least 3 (76.2mm) inches. If t[...]

  • Page 3

    3 Lighting Instructions for the G(B/W) 650 and 750 models .[...]

  • Page 4

    4 ELECTRONIC HOT SURF ACE IGNITION CONTROL BOARD ALL MODELS - The WHC1502 ignition control board is a fully integrated, state of the art electronic control system. The ignition control board includes a microprocessor , which governs all temperature and ignition control functions for the appliance. Inherent in the design are the normal operating seq[...]

  • Page 5

    5 Figure 1. Dia-Scan II Display Board. Green Status Lights LED 1: Call for Heat LED 2: Flow Switch LED 3: Pressure Switch LED 4: Ignitor Current LED 5: Gas V alve LED 6: Flame Sense Red Fault Lights LED 7: Ignition Fail LED 8: Circulate Failure LED 9: Blower Failure LED 10: Blocked Inlet LED 1 1: Blocked Flue W ater T emperature Set Lights LED 12: [...]

  • Page 6

    6 T o change or view the current programmed post-circulating time: 1 . Press the SELECT push-button on the display board until the LED display reads OPt (Options). 2. T o enter into the options mode, press the ENTER/RESET push- button. 3. The display will illustrate Circ. Enter this mode by pressing the ENTER/RESET push-button. 4 . The display will[...]

  • Page 7

    7 Figure 2. WHC 1502 Ignition Control Board DANGER HOT W A TER TEMPERA TURES REQUIRED FOR AUTOMA TIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD BURNS RESUL TING IN SERIOUS PERSONAL INJURY AND/ OR DEA TH. THE TEMPERA TURE A T WHICH INJURY OCCURS V ARIES WITH THE PERSON'S AGE AND TIME OF EXPOSURE. THE SLOWER RESPONSE TIME OF DISABLED PERSONS INC[...]

  • Page 8

    8 T roubleshooting The WHC1502 Series Control System has many inherent diagnos- tic and fault detection routines built into its operating hardware and software. These routines, in conjunction with the four (4) digit LED display and eleven (1 1) LED status indicators on the Display Board, can greatly assist any service person in quickly pinpointing [...]

  • Page 9

    9 FIGURE 3. POINT TO POINT WIRING DIAGRAM[...]

  • Page 10

    10 NEW BOILER LIMITED W ARRANTY A. O. Smith Corporation, the warrantor , extends the following LIMITED W ARRANTY to the owner of this hydronic boiler: 1. If within TEN years after initial installation of the boiler , the heat exchanger shall prove upon examination by the warranto r to be defective in material or workmanship, the warrantor , at his [...]