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Siemens RDF800KN.., RDF800KN/VB, RDD810KN/NF Basic documentation CE1P3174en
Smart Infrastructure 2020-02-21
The table below shows the relation between parameter, temperature source and
temperature display:
P51
External temp.
Source for display of
Output control
Floor temp.
OFF Yes External sensor External temp. sensor Not active
10…50 ˚C Yes Built-in sensor
Built-in sensor + limit by
Active
The "Floor temperature limitation" function influences the outputs listed in the table
below:
"Floor temp. limit" function has impact on…
Output Y11 Output Y21
Heating
(P01 = 0/2/3)
Cooling
(P01 = 1/2/3)
(P01 = 4) Remark
2-pipe H/C valve Y1 N/A
2-pipe and
electric
heater
H/C valve El heater Y1, Y2 Y2
*)
4-pipe Heating
valve
Cooling
valve
Y1 N/A Y1
*)
If P13 = ON à electric heater in cooling mode
Either floor temperature sensor or external room temperature sensor can be used.
Dew point monitoring is essential to prevent condensation on the chilled ceiling
(cooling with fan disabled, P52). It helps avoid associated damage to the building.
A dew point sensor with a potential-free contact is connected to multifunctional
input X1 or X2. If there is condensation, the cooling valve is fully closed until no
more condensation is detected, and the cooling output is disabled temporarily.
The alarm icon flashes during temporary override and the fault "Condensation
in room" is sent using the bus.
The input must be configured accordingly (P38, P40). See section 3.9.
The "Screen lock" function is enabled and disabled only by using P14. There are
three options:
· Unlock
· Locked (all adjustments are locked but can be viewed)
· Setpoint (note: only setpoint adjustment is not locked)
The "Buzzer" function provides audio feedback when you touch the operating icons
on the thermostat (see page 9).
Enable or disable the “Buzzer” function via P16.
Fault state
Fault information
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