Assessments - 5, GPA: 4.4 ( )

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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 set-point temperature into controller memory. 6. The appliance will now control the temperature to the desired set-point value. NOTE: The boiler must complete a full cycle in order for the new setting to take effect. If the unit is turned off prior to a complete cycle the setting will be lost and the previous setting will remain in effect. If the ADJUST push-button is held down long enough, the set-point will reach 110°F, the minimum value (or 240°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 (240°F) and once again increase (decrease) in value for as long as the ADJUST push-button is pressed. Switching Differential Adjustment Procedure To facilitate proper operation and maximize appliance performance, the control has a programmable operating switching differential or "hysteresis" about the set point. This means a call for heat will become active when the water temperature measured at the outlet temperature sensing probe (Probe #1) drops to the set-point value minus the switching differential value. The burner will remain on until the water temperature measured at probe #1 reaches the set- point value. The switching differential value is fully programmable from 5°F to 50°F using the push-button(s) located on the Display Board. The default is set at 20°F. To change or view the current programmed switching differential: 1. Press the SELECT push-button on the display board until the Set-Pt differential LED (LED 16, see figure 1) is illuminated. 2. The LED display will show the current switching differential. 3. Press and hold the ADJUST push-button. The displayed value will either increase or decrease. To alternate between increasing or decreasing the switching differential, release then press and hold the ADJUST push-button. 4. When the desired switching differential is reached, release the ADJUST push-button. 5. Press the ENTER/RESET push-button once, this enters the selected switching differential value into controller memory. 6. The appliance will now control temperature utilizing the desired switching differential value. If the ADJUST push-button is held down long enough, the switching differential setting will reach 5, the minimum value (or 50, the maximum value) and stop. At this point, if the desired switching differential is not obtained, release the ADJUST push-button and depress it again. The switching differential value will now restart at 5 (50) and once again increase (decrease) in value for as long as the ADJUST push-button is pressed. Circulating Pump Adjustment Procedure The Controller is factory set with a 45 second post circulate function. Using the Display Board, the user has the capability to choose between a 45, 90, or 180 second post cir...

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