Siemens AVS75.39 Series User Manual page 67

Excess heat draw
Buffer storage tank /
primary controller
With buffer
With primary controller /
system pump
Siemens
Building Technologies
Line no.
HC1 HC2 HC3
861 1161 1461
The source, input Hx or a storage tank can trigger an excess heat draw.
If excess heat draw is activated, excess heat can be made available to heat
transfer. This can be selected separately for each heating circuit.
Off
Excess heat draw is deactivated.
Heating mode.
Excess heat is drawn only when the controller operates in heating mode.
Always
Excess heat is drawn in all operating modes.
Line no.
HC1 HC2 HC3
870 1170 1470
872 1172 1472
No
Hydraulically speaking, the heating circuit is connected upstream of the buffer
storage tank and cannot draw any heating or cooling energy from it. The heat or
refrigeration request is forwarded to the heat/refrigeration source upstream of the
buffer storage tank.
Yes
The heating circuit is connected after the buffer storage tank. It draws heat or
cooling energy from the buffer storage tank and its temperature request is taken
into account by buffer management.
No
Hydraulically speaking, the heating circuit is connected upstream of the primary
controller / system pump and cannot draw any "precontrolled" heating or cooling
energy. The heat or refrigeration request is always forwarded to the
heat/refrigeration source upstream of the primary controller.
Yes
The heating circuit is connected downstream of the primary controller / system
pump. The primary controller ensures control of a valid heat or refrigeration
request, or the system pump is activated.
User manual RVS43.345
The settings in detail
Operating line
Excess heat draw
Off ¦ Heating mode ¦ Always
Operating line
With buffer
With prim contr/system pump
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CE1U2354en_021
2013-09-02