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The standard programmable temperature range for the indirect water tank is 110°F to 190°F. The switching differential of the probe is fixed at 5°F. Tank Probe Temperature Set-point Adjustment Procedure The user can easily change the tank probe water temperature set- point at any time by using the following procedure: 1. Press the SELECT push-button on the display board until both the Set-Pt LED (LED 15, see figure 1) and Inlet Water Temperature LED (LED 12, see figure 1) are illuminated. NOTE 3: When a tank probe is connected to the board at location CN10, the Inlet Water Temperature LED defaults to Tank Water Temperature. 2. The LED display will show the current tank set-point temperature. 3. Press and hold the ADJUST push-button. The displayed temperature will either increase or decrease. To alternate between increasing or decreasing the temperature, release then press and hold the ADJUST push-button. 4. When the desired set-point temperature is reached, release the ADJUST push-button. 5. Press the ENTER/RESET push-button once, this enters the selected tank set-point temperature into controller memory. 6. The appliance will now control the tank water temperature to the desired set-point value. If the ADJUST push-button is held down long enough, the set-point will reach 110°F, the minimum value (or 190°F, the maximum value) and stop. At this point, if the desired set-point is not obtained, release the ADJUST push-button and depress it again. The set-point value will now restart at 110°F (190°F) and once again increase (decrease) in value for as long as the ADJUST push-button is pressed. 6 TANK PROBE JUMPER J33 IS ON AS DEFAULT, READY FOR USE WITH TANK PROBE SUPPLIED WITH THE BOILER (GW MODELS ONLY. SEE FIGURE 3 FOR CONNECTION DIAGRAM). FOR STANDARD TANK CONTROLS (e.g., 24 VAC HONEYWELL AQUASTAT) REMOVE THIS JUMPER AND CONNECT THE CONTROL TO THE BROWN WIRES IN THE JUNCTION BOX ON THE BACK OF THE BOILER. Figure 2. WHC 1502 Ignition Control Board DANGER HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD BURNS RESULTING IN SERIOUS PERSONAL INJURY AND/ OR DEATH. THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH THE PERSON'S AGE AND TIME OF EXPOSURE. THE SLOWER RESPONSE TIME OF DISABLED PERSONS INCREASES THE HAZARDS TO THEM. NEVER ALLOW SMALL CHILDREN TO USE A HOT WATER TAP, OR TO DRAW THEIR OWN BATH WATER. NEVER LEAVE A CHILD OR DISABLED PERSON UNATTENDED IN A BATHTUB OR SHOWER. THE WATER HEATER SHOULD BE LOCATED IN AN AREA WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS TO SET TEMPERATURES. It is recommended that lower water temperatures be used to avoid the risk of scalding. It is further recommended, in all cases, that the water temperature be set for the lowest temperature which satisfies the user's hot water needs. This will also provide the most energy efficient operation of the water heater and minimize scale formation. SETTING THE WATER HEATER TEMPERATURE AT 120°F WILL REDUCE THE RISK OF SCALDS. Some state...

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