Siemens AVS75.39 Series User Manual page 76

Mixing valve in heating
mode
Dewpoint monitoring
Dewpt monitor locking
time
Flow setp increase hygro
Flow setp incr start at r.h.
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This defines the position of mixing valve 1 (Y1 / Y2) when heating mode is active.
This parameter has no impact on systems with hydraulically separate heating and
cooling circuits.
Controls The valve provides control in heating and cooling mode.
Open The valve is used for control in cooling mode, it is open in heating mode.
Line no. Operating line
946 Lock time dewpoint monitor
947 Flow temp setp incr hygro
948 Flow setp incr start at r.h.
950 Flow temp diff dewpoint
When the connected dewpoint monitor detects the formation of condensation it
closes the contact, thereby deactivating the cooling.
The "Lock time dewpoint monitor" set here starts when the contact opens again.
Cooling can be resumed only when the locking time has elapsed.
The dewpoint monitor must be assigned to the H.. input as "dewpoint monitor".
To prevent the formation of condensation due to excess indoor air humidity, a
hygrostat can be used to implement a fixed increase in the flow temperature.
As soon as the room humidity exceeds the value set on the hygrostat, its contact
closes and the flow temperature setpoint is increased by the set amount.
The hygrostat must be assigned to the H input as "Flow setpt increase hygro".
To prevent the formation of condensation due to excess indoor air humidity, a DC
0...10 V humidity measurement can be used to implement a continuous increase
in the flow temperature.
If the relative humidity in the room exceeds the value defined by "Flow setp incr
start at r.h." the flow temperature setpoint is increased continuously. The start of
the increase (BZ 948) and the maximum increase (BZ 947) can be programmed.
The humidity sensor must be assigned to the H.. input as "Relative room humidity
10V".
dT TVKw Increase of flow temperature setpoint
r.F. Relative humidity
BZ Operating line
User manual RVS43.345
The settings in detail
CE1U2354en_021
2013-09-02