Siemens AVS75.39 Series User Manual page 81

Example
Priority
Siemens
Building Technologies
Time program 4 / DHW
DHW heating makes use of time program 4 of the local controller. The set
switching times of that program are used to switch between the nominal DHW
setpoint and the reduced DHW setpoint. This way, the DHW storage tank is
charged independently of the heating circuits.
0 6
Line no. Operating line
1630 Charging priority
Absolute ¦ Shifting ¦ None ¦ MC shifting, PC absolute
When both space heating and DHW heating demand heat, the "DHW priority"
function ensures that during DHW charging the boiler's capacity is used primarily
for DHW.
Absolute priority
Mixing and pump heating circuits are locked until the DHW reaches the required
temperature level.
Shifting priority
If the heat source is no longer able to meet the demand, the mixing and pump
heating circuits are restricted until the DHW reaches the required temperature
level.
No priority
DHW charging occurs in parallel to heating mode.
In the case of tightly sized boilers and mixing heating circuits, it can occur that the
DHW setpoint will not be reached if space heating demands considerable amounts
of heat.
Mixing heating circuit shifting, pump heating circuit absolute
The pump heating circuits remain locked until the DHW storage tank is heated up.
If the heat source is no longer able to meet the demand, the mixing heating circuits
will be restricted as well.
User manual RVS43.345
The settings in detail
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h
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CE1U2354en_021
2013-09-02