User ManualTable of ContentsSoftware version11Safety instructions11Intended use11Requirements for start-up11Power supply12Connection conditions12Cable cross-sections12Maximum cable lengths12Cable installation12Grounding and zeroing13Hot-water temperature greater than 60 °C13Connection of accessory parts14Maintenance and cleaning14Safety precautions for EMC-compliant installation15Overview20Abbreviations21Operation22Display and operating elements22Display (basic display)23Operating elements245.1.2.1 Input button (press / turn)245.1.2.2 "Daytime room temperature" button245.1.2.3 "Night-time room temperature" button255.1.2.4 "Daytime hot-water temperature" button255.1.2.5 "Operating mode" button (basic display)265.1.2.6 "Switching time programs / Holiday programs" button335.1.2.7 "System information" button355.1.2.8 "Manual mode" / "Emission measurement" button445.1.2.9 Access to the technician / OEM area465.1.2.10 Heating curve47Menu-selection level48"Time - Date" menu54"Timeprograms" menu555.2.2.1 Selection of the control circuit565.2.2.2 Selection of the program565.2.2.3 Selection of day of the week and cycle565.2.2.4 Programming switching times and cycle temperatures57"System Parameters" menu725.2.3.1 Language selection725.2.3.2 Time program735.2.3.3 Operating mode745.2.3.4 Parameter reset765.2.3.5 Complete reset77"DHW" menu775.2.4.1 Night-time hot-water temperature785.2.4.2 Legionella protection day78Heating Circuit 2" menu785.2.5.1 Reduced operation795.2.5.2 Heating system80Error messages80Parameter settings81"Hydraulics" menu (HYDRAULIC)81"System parameters" menu (SYSTEM)85"Hot-water circuit" menu (DHW)89"Direct heating circuit" menu (UNMIXED CIRC)92menus95"Heat generator" menu (HEAT GENER99"District hot water" menu (DIST.HEATING)104"Return increase" menu (RETURN CONTR)105"Solar" menu (SOLAR)1065.4.10 "Solid" menu (SOLID FUEL)1075.4.11 "Buffer" menu (BUFFER)1085.4.12 "Total flow regulation" menu (MAIN SUPPLY)1095.4.13 "Cascading" menu (CASCADE)1105.4.14 "Data bus" menu (BUS)1115.4.15 "Relay test" menu (RELAY TEST )1115.4.16 "Error messages" menu (ALARM)1125.4.17 "Error messages 2" menu (ALARM 2)1135.4.18 "Sensor calibration" menu (SENSOR ADJ.)113Control Functions114outputs)114Connection and settings table116Switching time program enabling117Suppressing the cycle temperature on time program level118Enabling "Separate Control Mode"118Switching from SDC to DHC119Selection of hydraulic parameter presettings119The variable inputs and outputs of device series SDC/DHC 43119General functions and their operation120Outside temperature sensing1206.8.1.1 Building type120Heating circuit outside temperature assignment121Outside temperature emergency operation value121Outside temperature disable122Climate zone122Design temperature122Summer switch-off123System frost protection124Pump forced operation127Hydraulic Components128Heat generator: Boiler128Heat generator start-up protection128Heat generator minimum temperature limit129Maximum temperature limit heat generator130Heating circuits minimum temperature limit130Heat generator sensor control mode130Minimum burner runtime131Switching: Multi-stage heat generator/Switching differential131Operation for modulating burners136Modulation of P part (Xp)1377.1.10 Modulation of sample time Ta1377.1.11 Modulation of integral action time Tn1387.1.12 Modulation of runtime1387.1.13 Modulation of start time1387.1.14 Modulation of start power1397.1.15 OpenTherm1407.1.16 Use of boiler sensor 21417.1.17 External heat generator cut-off1417.1.18 Heat generator forced discharge1417.1.19 Exhaust gas temperature monitoring1427.1.20 Burner counter mode143Heat generation, heat exchanger, district heating144On/Off operation of the district heating valve145Continuous heat exchanger valve control145District heating return temperature limit147Return temperature limit for hot-water loading149Hot-water pre-regulator with district heating systems150Mode of operation: Hot-water pre-control151Quick hot-water control152operation"154Conditional parallel operation for mixed heating circuits1557.2.10 Circulation pump control mode1557.2.11 Switch-off of district heating control1567.2.12 Return interval flushing156or thermal output1567.2.14 Charging pump (CHP)1577.2.15 Primary pump1587.2.16 Boiler circuit pump1587.2.17 Return increase1597.2.17.1 Bypass pump (RBP)1607.2.17.3 Indirect return increase161Heating circuit161General heating circuit functions1617.3.1.1 Heating curve1617.3.1.2 Heating curve setting (heating curve)1627.3.1.3 Reduced operation1647.3.1.4 Heating system1647.3.1.5 Heating circuit temperature limit1647.3.1.6 Heating circuit temperature offset1657.3.1.7 Heating circuit pump extended running time1657.3.1.8 Screed function165Heating circuit constant temperature control168Fixed-value control168Consideration of the room temperature/room influence1697.3.4.1 Heating circuit room connection1697.3.4.2 Heating circuit room factor1707.3.4.3 Heating circuit room controller1717.3.4.4 Switch-on/switch-off optimisation1717.3.4.5 Room setpoint ramp1757.3.4.6 Heating limit function1757.3.4.7 Heating circuit room frost protection limit1777.3.4.8 Mixed heating circuits cooling switch-over1777.3.4.9 Heating circuit name180temperature limit)181Hot-water production1877.3.5.1 Hot-water tank loading (SLP)1877.3.5.2 Circulation pump (CIR.)194Solar/Solid fuel/Buffer1967.3.6.1 Solar function1967.3.6.2 Buffer tank function1997.3.6.3 Solid fuel function212Tank loading switch-over213Hydraulic buffer relief (HBR)215Easy enabling and disabling of a heating pump2167.3.10 Other system components2177.3.10.1 Global fault message input2177.3.10.2 Global fault message output2177.3.10.4 External switching modem2187.3.10.5 External information2197.3.10.6 Demand contact2197.3.11 Bus communication2217.3.11.1 Bus address of central device2217.3.11.2 Control functions via the data bus2227.3.11.3 Operation of wall devices2277.3.12 Cascading of heat generators in the bus system2327.3.12.1 General description of cascading of control devices2327.3.12.2 Function of the cascade parameters2337.3.12.3 Mode of operation of cascade control2347.3.13 Commissioning, maintenance and troubleshooting help2377.3.13.1 Automatic set function2377.3.13.2 Emission measurement (not for DHC 43)2387.3.13.3 Relay/function test239Error messages243Basic display/fault stack fault messages2487.4.1.1 Sensor calibration2497.4.1.2 Full controller reset2497.4.1.3 Controller time correction249Technical data250General250Installation recommendations251Sensor resistance values251NTC 20251PT 1000252Sensor measurement ranges252Digital inputs253Log254Index255Size: 2.65 MBPages: 258Language: EnglishOpen manual
