Siemens AVS75.39 Series User Manual page 125

Auto heat gen lock SD
Temp diff buffer/HC
Temp diff buffer/CC
Siemens
Building Technologies
The switching differential can be adjusted. If there is only a sensor (B4) in the
buffer, a min switching differential of 2 K applies to the minimum, even if the value
selected at the parameter is less.
If 2 or more sensors are used, the parameterized value applies (see graph shown
at ?????4722 and 4722) .
A mixing valve boost is often set for plant with a high switching differential for
switching on/of generation. This mixing valve boost is not required for heat source
from a storage tank and can be compensated using the parameter "Temp'diff
buffer/HC" (line 4722).
If the temperature differential T between the buffer storage tank and the cooling
request from the cooling circuit is sufficiently large, the cooling energy required by
the cooling circuit is drawn from the buffer storage tank. The refrigeration source is
locked.
Released
The refrigeration source is released as soon as the temperature at both buffer
storage tank sensors lies by "Temp diff buffer/CC" plus 1 K above the required flow
temperature.
Locked
The refrigeration source is locked as soon as the temperature at both buffer
storage tank sensors lies by less than "Temp diff buffer/CC" above the required
flow temperature.
T
B41
TVLKw
E
TVLKw Flow temperature setpoint in cooling mode
R Refrigeration source
User manual RVS43.345
The settings in detail
B4
1K
4723
t
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CE1U2354en_021
2013-09-02