31
Note:
In the case of thermal disinfection, the thermal disinfection nominal temperature value
LEG01 THM.DISINFECT. TEMP.
is the minimum heat source temperature.
If this temperature is fallen below, thermal disinfection mode will only be activated again
once the heat source is heated to the therm. disinfection nominal temperature value plus
boost.
8.7
Return layering
Functions
Return layering
...is used to ensure the temperature layering, e.g. in solar storage tanks. With the VSR
switching valve, the return water can be charged in the storage tank at 2 different heights.
With parameter SCH04 a fixed value can be set to define the return layering independent
from the buffer sensor.
Function
TPR < TU1 + 2 K, then VSR active; the return flow is charged in the lower zone.
TPR > TU1 +
LAY01 Diff. RET. layering
, then VSR off. the return flow is charged in the
upper zone.
8.8
Recharging, primary
Functions
Recharging / heat request
Heat request on primary side with additional sensor in the heat source.
If the temperature at the top storage tank sensor TO1 is less than the current set point
T1Oset minus
NAC03 Recharging hysteresis
, recharging is enabled or heat requested.
If the current set point is exceeded at the top storage tank sensor TO1, recharging is dis-
abled or the heat request is ended. Recharging can be additionally restricted via a time pro-
gram.
Function
T1O < T1Oset -
NAC03 HYSTERESIS
, then NALAD active
T1O > T1Oset, then NALAD disabled
Setpoint value
T1Oset (normal mode) =
BAS01 TSET DOMESTIC HOT WATER
+ DIFF *
T1Oset (legio. protection) =
LEG01 THERM.DISINFECT.TEMP.
+ DIFF *
*) Dynamic temperature difference
... Flow-dependent determination of the charging boost on the primary side.
SEK04 DHW FLOW RATE
=
STE15 MIN. TAPPING RATE
,
then DIFF =
STE14 MIN. TDIFF HEAT EXCH
.
STE15 MIN. TAPPING RATE
<
SEK04 DHW FLOW RATE
<
STE17 MAX. TAPPING RATE
, then DIFF = calculated linearly between
STE14 MIN. TDIFF HEAT EXCH.
and
STE16 MAX. TDIFF HEAT EXCH.
SEK04 DHW FLOW RATE
=
STE17 MAX. TAPPING RATE
,
then DIFF =
STE16 MAX. TDIFF HEAT EXCH.
Communication
The recharging set point passed on in the active communication on the eBUS network is
T1Oset
PRI02 TSET TANK, TOP
plus 5 K.
Protective function
... see also "8.6.3 Min. heat source temperature", page 30.
Содержание TACOTHERM FRESH PETA ES 5941S
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