Assessments - 5, GPA: 4.4
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Protect OFF OFF to 104 .F 27 Sys Sense Fault Enable system sensor error reporting ON ON/OFF Setting 28 Freeze Protect Heater freeze protection, enables heater pump at return temps below 44 .F, fires heater if temps drop below 37 .F. ON ON/OFF 29 DHW Demand Start Max for normal DHW operation, Min for low fire start DHW Maximum Maximum/Minimum 30 Extra Boiler Off if no extra boiler, 100 for extra on/off boiler. OFF OFF/50-100 Setting 31 Sing Boil Casc Enable single boiler cascade for single boiler primary/secondary operation with a system sensor OFF ON/OFF 32 Maintenance Mode Installers only -Enable maintenance mode alert by date or running hours OFF OFF/RH/Date 33/34/35 Maintenance Setting Running hours or date 36 Maintenance Setting Telephone numbers 000-000-0000 Will not display if all 0's 38 Installer Menu The installer menu consists of several items that can be adjusted. To access the installer menu, press and hold the ENTER/MENU key for 5 seconds. Using the UP and DOWN, and LEFT and RIGHT arrow keys, enter 925, then press ENTER/MENU. Scroll through the list of adjustable items by pressing the LEFT or RIGHT arrow keys. Once the desired item is displayed, press the ENTER/MENU key to select it. The screen will begin to flash. Press the DOWN arrow key to decrease the values, and the UP arrow key to increase them. To store the changes, press the ENTER/MENU key. The display returns to normal mode after one minute. Pressing the ESC/RESET key before storing changes will restore the original value. The central heating demand is detected when the room thermostat closes. When an outside sensor is also connected, the supply temperature will depend on the factory default central heating curve which is sufficient for most applications. OUTDOOR RESET CURVE Factory Default To set your own custom heat curve you will have to set the following parameters. Use the graphs in Figs. 33 and 34 to assist you in the design of the curve. 1. Minimum outside design temperature: Function 8 2. Design Supply water temperature at the minimum design outside temperature: Function 9 3. Maximum outside design temperature: Function 10 4. Design Supply Water Temperature at the maximum outside temperature: Function 11 NOTE: It is important to note that the user can adjust the heat curve down by adjusting the central heating temperature to a lower setting. OUTDOOR RESET CURVE Plot your Curve 212 212 203 203 201° 194 194 185 185 176 FUNCTION 9 176 167 167 158 158 DEFAULT RESET CURVE F) 149 149 URE ( 131 (F) 131URE RAT122 122 ERATEMPE113 113EMPET T104 104ET TOUTL95 FUNCTION 11 95OUTL86 86SUPPLY 77 FUNCTION 8FUNCTION 10 SUPPLY 77 68 68 59 59 50 50 41 41 32 -59 -41 -24 -9 0 9 27 45 63 81 99 32 -59 -41 -24 -9 0 9 27 45 63 81 99 5° 68° OUTSIDE TEMPERATURE (F) OUTSIDE TEMPERATURE (F) Fig. 33: Outdoor Reset Curve Factory Default Fig. 34: Outdoor Reset Curve Plot Your Curve 39 40 WIRING DIAGRAM NOTE: The wiring diagrams in this manual show all standard options. Refer to the large wiring diagram provided with your boiler for options installed on your specific unit(s). START-UP Pre Start-up Filling System (Heating Boilers) Fill system with water. Purge all air from the system. Lower system pressure. Open valves for normal system operation, and fill system through feed pressure. Manually open air vent on the compression tank until water appears, then close vent. Air Purge (Domestic Hot Water Heaters) CAUTION: An air vent should be installed at the highest point in the system for proper operation. If water piping is located higher than the boiler, it should be relocated to the highest point in the installed system. Purge all air from system before lighting heater. This can be normally accomplished by opening a downstream valve. Venting System Inspection 1. Check all vent pipe connections and flue pipe material. WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. 2. Make sure vent terminations are installed per code and are clear of all debris or blockage. For Your Safety This appliance has a direct spark igniter. It is equipped with an ignition device which automatically lights the burners. Do not try to light the burners by hand. BEFORE OPERATING, smell all around the appliance area for gas. Be sure to smell near the floor because some gas is heavier than air and will settle on the floor. WHAT TO DO IF YOU SMELL GAS: • Do not try to light any appliance. • Do not touch any electrical switch; do not use any telephone in your building. ± Immediately call your gas supplier from a neighbor’s telephone. Follow the gas supplier’s instructions. ± If you cannot reach your gas supplier, call the fire department. ± Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not turn by hand, do not try to repair it, call a qualified service technician. Forced or attempted repair may result in a fire or explosion. ± Do not use this applianc...
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