Honeywell SDC heating and district heating controller User manual

EN2H-0221GE51 R0808
Smile SDC heating and
district heating controller
SERVICE MANUAL

EN2H-0221GE51 R0808

SDC / DHC Contents
EN2H-0221GE51 R0808 3
Contents
1Software version ..........................................................................................................11
2Safety instructions.......................................................................................................11
2.1 Intended use .....................................................................................................11
2.2 Requirements for start-up..................................................................................11
2.2.1 Power supply ........................................................................................12
2.2.2 Connection conditions ..........................................................................12
2.2.3 Cable cross-sections ............................................................................12
2.2.4 Maximum cable lengths ........................................................................12
2.2.5 Cable installation ..................................................................................12
2.2.6 Grounding and zeroing .........................................................................13
2.3 Hot-water temperature greater than 60 °C ........................................................13
2.4 Connection of accessory parts ..........................................................................14
2.5 Maintenance and cleaning ................................................................................14
2.6 Safety precautions for EMC-compliant installation ............................................15
3Overview.......................................................................................................................20
4Abbreviations ...............................................................................................................21
5Operation......................................................................................................................22
5.1 Display and operating elements ........................................................................22
5.1.1 Display (basic display)..........................................................................23
5.1.2 Operating elements ..............................................................................24
5.1.2.1 Input button (press / turn)........................................................24
5.1.2.2 "Daytime room temperature" button ........................................24
5.1.2.3 "Night-time room temperature" button.....................................25
5.1.2.4 "Daytime hot-water temperature" button .................................25
5.1.2.5 "Operating mode" button (basic display) .................................26
5.1.2.6 "Switching time programs / Holiday programs" button ............33
5.1.2.7 "System information" button....................................................35
5.1.2.8 "Manual mode" / "Emission measurement" button ..................44

Contents SDC / DHC
4 EN2H-0221GE51 R0808
5.1.2.9 Access to the technician / OEM area ......................................46
5.1.2.10 Heating curve..........................................................................47
5.2 Menu-selection level..........................................................................................48
5.2.1 "Time - Date" menu ..............................................................................54
5.2.2 "Timeprograms" menu ..........................................................................55
5.2.2.1 Selection of the control circuit .................................................56
5.2.2.2 Selection of the program .........................................................56
5.2.2.3 Selection of day of the week and cycle ...................................56
5.2.2.4 Programming switching times and cycle temperatures ...........57
5.2.3 "System Parameters" menu..................................................................72
5.2.3.1 Language selection .................................................................72
5.2.3.2 Time program..........................................................................73
5.2.3.3 Operating mode ......................................................................74
5.2.3.4 Parameter reset ......................................................................76
5.2.3.5 Complete reset........................................................................77
5.2.4 "DHW" menu ........................................................................................77
5.2.4.1 Night-time hot-water temperature............................................78
5.2.4.2 Legionella protection day ........................................................78
5.2.5 "Direct Heating Circuit" / "Mixed Heating Circuit 1" / "Mixed
Heating Circuit 2" menu........................................................................78
5.2.5.1 Reduced operation..................................................................79
5.2.5.2 Heating system .......................................................................80
5.3 Error messages.................................................................................................80
5.4 Parameter settings ............................................................................................81
5.4.1 "Hydraulics" menu (HYDRAULIC) ........................................................81
5.4.2 "System parameters" menu (SYSTEM) ................................................85
5.4.3 "Hot-water circuit" menu (DHW) ...........................................................89
5.4.4 "Direct heating circuit" menu (UNMIXED CIRC) ...................................92
5.4.5 "Mixed heating circuit 1 / 2" (MIX.VALVE - 1 / MIX.VALVE - 2)
menus ...................................................................................................95
5.4.6 "Heat generator" menu (HEAT GENER................................................99

SDC / DHC Contents
EN2H-0221GE51 R0808 5
5.4.7 "District hot water" menu (DIST.HEATING) ........................................104
5.4.8 "Return increase" menu (RETURN CONTR)......................................105
5.4.9 "Solar" menu (SOLAR) .......................................................................106
5.4.10 "Solid" menu (SOLID FUEL)...............................................................107
5.4.11 "Buffer" menu (BUFFER)....................................................................108
5.4.12 "Total flow regulation" menu (MAIN SUPPLY)....................................109
5.4.13 "Cascading" menu (CASCADE) .........................................................110
5.4.14 "Data bus" menu (BUS) ......................................................................111
5.4.15 "Relay test" menu (RELAY TEST )....................................................111
5.4.16 "Error messages" menu (ALARM) ......................................................112
5.4.17 "Error messages 2" menu (ALARM 2) ................................................113
5.4.18 "Sensor calibration" menu (SENSOR ADJ.) .......................................113
6Control Functions ......................................................................................................114
6.1 Variable adjustment of the hydraulic parameters (variable inputs and
outputs) ...........................................................................................................114
6.1.1 Connection and settings table ............................................................116
6.2 Switching time program enabling ....................................................................117
6.3 Suppressing the cycle temperature on time program level..............................118
6.4 Enabling "Separate Control Mode"..................................................................118
6.5 Switching from SDC to DHC ...........................................................................119
6.6 Selection of hydraulic parameter presettings ..................................................119
6.7 The variable inputs and outputs of device series SDC/DHC 43 ......................119
6.8 General functions and their operation .............................................................120
6.8.1 Outside temperature sensing..............................................................120
6.8.1.1 Building type .........................................................................120
6.8.2 Heating circuit outside temperature assignment.................................121
6.8.3 Outside temperature emergency operation value...............................121
6.8.4 Outside temperature disable...............................................................122
6.8.5 Climate zone.......................................................................................122
6.8.6 Design temperature ............................................................................122
6.8.7 Summer switch-off..............................................................................123

Contents SDC / DHC
6 EN2H-0221GE51 R0808
6.8.8 System frost protection.......................................................................124
6.8.9 Pump forced operation .......................................................................127
7Hydraulic Components..............................................................................................128
7.1 Heat generator: Boiler .....................................................................................128
7.1.1 Heat generator start-up protection......................................................128
7.1.2 Heat generator minimum temperature limit.........................................129
7.1.3 Maximum temperature limit heat generator ........................................130
7.1.4 Heating circuits minimum temperature limit ........................................130
7.1.5 Heat generator sensor control mode ..................................................130
7.1.6 Minimum burner runtime.....................................................................131
7.1.7 Switching: Multi-stage heat generator/Switching differential...............131
7.1.8 Operation for modulating burners .......................................................136
7.1.9 Modulation of P part (Xp)....................................................................137
7.1.10 Modulation of sample time Ta.............................................................137
7.1.11 Modulation of integral action time Tn..................................................138
7.1.12 Modulation of runtime .........................................................................138
7.1.13 Modulation of start time ......................................................................138
7.1.14 Modulation of start power ...................................................................139
7.1.15 OpenTherm ........................................................................................140
7.1.16 Use of boiler sensor 2.........................................................................141
7.1.17 External heat generator cut-off ...........................................................141
7.1.18 Heat generator forced discharge ........................................................141
7.1.19 Exhaust gas temperature monitoring..................................................142
7.1.20 Burner counter mode..........................................................................143
7.2 Heat generation, heat exchanger, district heating ...........................................144
7.2.1 On/Off operation of the district heating valve......................................145
7.2.2 Continuous heat exchanger valve control...........................................145
7.2.3 District heating return temperature limit..............................................147
7.2.4 Return temperature limit for hot-water loading....................................149
7.2.5 Hot-water pre-regulator with district heating systems .........................150
7.2.6 Mode of operation: Hot-water pre-control ...........................................151

SDC / DHC Contents
EN2H-0221GE51 R0808 7
7.2.7 Quick hot-water control.......................................................................152
7.2.8 Mode of operation of hot-water control mode "external
operation" ...........................................................................................154
7.2.9 Conditional parallel operation for mixed heating circuits.....................155
7.2.10 Circulation pump control mode ...........................................................155
7.2.11 Switch-off of district heating control ....................................................156
7.2.12 Return interval flushing.......................................................................156
7.2.13 Heat meter for additional limitation according to the volume flow
or thermal output ................................................................................156
7.2.14 Charging pump (CHP) ........................................................................157
7.2.15 Primary pump .....................................................................................158
7.2.16 Boiler circuit pump ..............................................................................158
7.2.17 Return increase ..................................................................................159
7.2.17.1 Bypass pump (RBP)..............................................................160
7.2.17.2 Return maintenance through controlled feed water
addition160
7.2.17.3 Indirect return increase .........................................................161
7.3 Heating circuit .................................................................................................161
7.3.1 General heating circuit functions ........................................................161
7.3.1.1 Heating curve........................................................................161
7.3.1.2 Heating curve setting (heating curve)....................................162
7.3.1.3 Reduced operation................................................................164
7.3.1.4 Heating system .....................................................................164
7.3.1.5 Heating circuit temperature limit............................................164
7.3.1.6 Heating circuit temperature offset .........................................165
7.3.1.7 Heating circuit pump extended running time .........................165
7.3.1.8 Screed function .....................................................................165
7.3.2 Heating circuit constant temperature control ......................................168
7.3.3 Fixed-value control .............................................................................168
7.3.4 Consideration of the room temperature/room influence......................169
7.3.4.1 Heating circuit room connection............................................169
7.3.4.2 Heating circuit room factor ....................................................170

Contents SDC / DHC
8 EN2H-0221GE51 R0808
7.3.4.3 Heating circuit room controller ..............................................171
7.3.4.4 Switch-on/switch-off optimisation ..........................................171
7.3.4.5 Room setpoint ramp..............................................................175
7.3.4.6 Heating limit function.............................................................175
7.3.4.7 Heating circuit room frost protection limit ..............................177
7.3.4.8 Mixed heating circuits cooling switch-over ............................177
7.3.4.9 Heating circuit name .............................................................180
7.3.4.10 Room thermostat function (maximum room
temperature limit) ..................................................................181
7.3.5 Hot-water production ..........................................................................187
7.3.5.1 Hot-water tank loading (SLP) ................................................187
7.3.5.2 Circulation pump (CIR.).........................................................194
7.3.6 Solar/Solid fuel/Buffer.........................................................................196
7.3.6.1 Solar function ........................................................................196
7.3.6.2 Buffer tank function ...............................................................199
7.3.6.3 Solid fuel function..................................................................212
7.3.7 Tank loading switch-over....................................................................213
7.3.8 Hydraulic buffer relief (HBR)...............................................................215
7.3.9 Easy enabling and disabling of a heating pump .................................216
7.3.10 Other system components..................................................................217
7.3.10.1 Global fault message input....................................................217
7.3.10.2 Global fault message output .................................................217
7.3.10.3 Timer 217
7.3.10.4 External switching modem ....................................................218
7.3.10.5 External information ..............................................................219
7.3.10.6 Demand contact....................................................................219
7.3.11 Bus communication ............................................................................221
7.3.11.1 Bus address of central device ...............................................221
7.3.11.2 Control functions via the data bus.........................................222
7.3.11.3 Operation of wall devices ......................................................227
7.3.12 Cascading of heat generators in the bus system................................232

SDC / DHC Contents
EN2H-0221GE51 R0808 9
7.3.12.1 General description of cascading of control devices .............232
7.3.12.2 Function of the cascade parameters .....................................233
7.3.12.3 Mode of operation of cascade control ...................................234
7.3.13 Commissioning, maintenance and troubleshooting help ....................237
7.3.13.1 Automatic set function...........................................................237
7.3.13.2 Emission measurement (not for DHC 43) .............................238
7.3.13.3 Relay/function test.................................................................239
7.4 Error messages...............................................................................................243
7.4.1 Basic display/fault stack fault messages ............................................248
7.4.1.1 Sensor calibration .................................................................249
7.4.1.2 Full controller reset................................................................249
7.4.1.3 Controller time correction ......................................................249
8Technical data............................................................................................................250
8.1 General ...........................................................................................................250
8.1.1 Installation recommendations .............................................................251
8.2 Sensor resistance values ................................................................................251
8.2.1 NTC 20 ...............................................................................................251
8.2.2 PT 1000 ..............................................................................................252
8.3 Sensor measurement ranges ..........................................................................252
8.4 Digital inputs....................................................................................................253
9Log ..............................................................................................................................254
Index....................................................................................................................................255

Contents SDC / DHC
10 EN2H-0221GE51 R0808