Honeywell SDC heating and district heating controller Service Manual page 7

SDC / DHC
7.2.7
7.2.8
7.2.9
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
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
7.3 Heating circuit .................................................................................................161
7.3.1
7.3.2
7.3.3
7.3.4
EN2H-0221GE51 R0808
Quick hot-water control.......................................................................152
Mode of operation of hot-water control mode "external
operation" ...........................................................................................154
Conditional parallel operation for mixed heating circuits.....................155
or thermal output ................................................................................156
7.2.17.1 Bypass pump (RBP)..............................................................160
7.2.17.2 Return maintenance through controlled feed water
addition 160
7.2.17.3 Indirect return increase .........................................................161
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
Heating circuit constant temperature control ......................................168
Fixed-value control .............................................................................168
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
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