Heat Request Modulating; Heat Request 2-Position - Siemens Synco 700 Series Basic Documentation

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Building Technologies
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The three 2-position heat requests differ in the type of heat request.
Depending on the selection of the boiler sequence operating mode (... > Main menu >
Boiler sequence manager > Boiler sequence optg mode > Preselection), either all 3 types are
evaluated or only individual ones.
Boiler sequence optg mode
Off
Summer operation
Auto
6.5.1

Heat request modulating

Heat demand can be predefined with a DC 0...10 V signal.
The signal can be matched to the DC 0...10 V signal source:
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Boiler sequence manager > Heat request
Operating line
[Modulating] setpoint at 0 V
[Modulating] setpoint at 10 V
[Modulating] limit value
°C
120
100
80
60
40
20
3
0
-20
0 2 4 6 8
Value in °C at DC 0 V
Value in °C at DC 10 V
Limit value for heat demand (temperatures below this level are interpreted as "no heat demand")
6.5.2

Heat request 2-position

Main menu > Commissioning > Settings > ... or
Main menu > Settings > Boiler sequence manager > Heat request
Main menu > Settings > Primary controller > Heat request
Operating line
[2-pos] setpoint DHW
[2-pos] priority DHW
[2-pos] setpoint frost prot
Boiler Sequence Controller RMK770
6 Boiler sequence management
Only the frost input is considered
Generation of maximum value from the DHW and frost
inputs
Generation of maximum value from all 3 inputs
Range
–150...50 °C
50...500 °C
0...140 °C
2
DC 0...10 V
10
Range
0...140 °C
None [DHW request] /
Shifting [DHW request] /
Absolute [DHW request] /
None [max selection] /
Shifting [max selection]
0...140 °C
Factory setting
0 °C
100 °C
10 °C
Factory setting
70 °C
Shifting [DHW
request]
70 °C
CE1P3132en
23.04.2009