Siemens RDG100KN Basic Documentation page 35

Application Output Y1
2-pipe H/C valve
2-pipe and H/C valve
electric heater
2-pipe and H/C valve
radiator
4-pipe Heating valve Cooling valve
4-pipe and Heating valve Cooling valve Electric
electric heater
st
2-stage 1 H/C
Note
Supply air temperature
limitation (RDG16..KN)
Note
Dewpoint monitoring
K N X
R
Fault state
Fault information
Siemens
Building Technologies
The "Floor temperature limitation" function influences the outputs listed in the table
below:
Output Y2 Output Y3
Electric
heater
Radiator
heater
nd
2 H/C
*)
If P13 = ON à electric heater in cooling mode
Either floor temperature sensor or external room temperature sensor can be used.
This function increases the comfort in the room by keeping the supply air
temperature of the fan coil unit between the selected minimum and maximum
temperature limits.
If the supply air temperature exceeds a limit, the thermostat reduces the
corresponding valve position until the supply air temperature is back in the limits.
In case the air flow is too low (especially with DC 0...10 V fans), this prevents cold
air from dumping into the room/warm air from bubbling straight up instead of
circulating.
To enable this function, the multifunctional input, to which the supply air sensor is
connected, needs to be set to "Supply air sensor" (e.g. P38 = 9). Then the
parameters for the limits are displayed (P63: minimum supply air temperature,
P64: maximum supply air temperature).
·
This function is only active in Comfort mode and can only be used with
DC 0...10 V actuators
·
This function is unavailable on applications with electric heater
Dewpoint monitoring is essential to prevent condensation on the chilled ceiling
(cooling with fan disabled, P52). It helps avoid associated damage to the building.
A Dewpoint sensor with a potential-free contact is connected to multifunctional
input X1, X2 or D1. If there is condensation, the cooling valve is fully closed until no
more condensation is detected, and the cooling output is disabled temporarily.
If the fan function is enabled (P52
Dewpoint function is active.
Note: when condensation is detected with
P01=5, the 6-port control ball valve will be close (5V)
P01=6, the combi-valve (PICV) will be closed and the 6-port ball valve will not
change position
The condensation symbol
"Condensation in room" is sent via bus.
The input must be commissioned accordingly (P38, P40 and P42).
See 3.9.
RDG100KN, RDG160KN, RDG165KN Basic Documentation
"Floor temp. limit" function has impact on
output
Heating Cooling
(P01 = 0/2/3) (P01 = 1/2/3)
Y1 N/A
*)
Y2 Y2
Y2 Y2
Y1 N/A
Y3 N/A
Y1, Y2 N/A
0), the fan continues to work as long as the
displays during temporary override and the fault
Heat. and cool.
(P01 = 4) Remark
Only electric heater
Only radiator
Y1
Y3 Only electric heater
CE1P3191en
2018-07-03
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