The controller drives the actuator with 2 relay outputs. One of the outputs is used for
opening the valve, the other for closing the valve.
For the 2-position actuator, the "2-position switching differential" must also be adapted.
The switching differential has no impact on 3-position actuators.
Sw
itching differential
2-pos
For the 3-position actuator, the running time of the mixin
g valve actuator can be
adjusted. The actuator running time has no impact on 2-position actuators.
ctuator running time
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.
Mix
ing valve in heating
mode
Controls The valve is used for control in heating and cooling mode.
Open.
The valve is used for control in cooling mode, it is open in heating
mode.
Dewpoint monitoring
Line no. Operating line
946 Lock time dewpoint limiter
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.
Lock time de
wpoint limiter
The "Lock time dewpoint lim
iter" set here starts running as soon as the contact
reopens. Cooling can only start after expiry of this locking time.
The dew
point limiter must be assigned to one of the Hx inputs as a "Dewpoint limiter".
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
air humidity exceeds the value set on the hygrostat, the contact closes and the flow
temperature setpoint is increased by the amount set here.
Flow
temp setp incr hygro
The hygrostat must be assig
ned to one of the Hx inputs as "Flow setp increase hygro".
To prevent the formation of condensation due to excess indoor air humidity, a
0…10 V humidity measurement can be used to implement a
proportional increase in
the flow temperature
.
Flow
setp incr start at r.h.
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 increase (949)
and the maximum increase (947) can be set.
The humidity sensor must be assigned to
one of the Hx inputs as "Rel room humidity
10V".
103/258
Siemens Switzerland Ltd User manual RVS61.843, RVS41.813 CE1U2355en_02
HVAC Products 6 The settings in detail 28. September 2009
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