Instruction/ maintenance manual of the product GB/GW-750 A.O. Smith
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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.
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.
3 Lighting Instructions for the G(B/W) 650 and 750 models ..
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.
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 L.
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.
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.
8 T roubleshooting The WHC1502 Series Control System has many inherent diagnos- tic and fault detection routines built into its operating hardware and software.
9 FIGURE 3. POINT TO POINT WIRING DIAGRAM.
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.
An important point after buying a device A.O. Smith GB/GW-750 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought A.O. Smith GB/GW-750 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data A.O. Smith GB/GW-750 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, A.O. Smith GB/GW-750 you will learn all the available features of the product, as well as information on its operation. The information that you get A.O. Smith GB/GW-750 will certainly help you make a decision on the purchase.
If you already are a holder of A.O. Smith GB/GW-750, 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 A.O. Smith GB/GW-750.
However, one of the most important roles played by the user manual is to help in solving problems with A.O. Smith GB/GW-750. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device A.O. Smith GB/GW-750 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
