Siemens RDF800KN Series User Manual

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Siemens RDF800KN.., RDF800KN/VB, RDD810KN/NF Basic documentation CE1P3174en
Smart Infrastructure 2020-02-21
In automatic fan mode and with the room temperature in the dead zone, the control
valve is normally closed and the fan disabled. With the "Fan kick" function, the fan
can be released from time to time at low speed for minimum on-time (see above)
even if the valve is closed.
This function can be used to avoid damage from moisture due to a lack of air circu-
lation, or to allow a return air temperature sensor to acquire the correct room
temperature.
Y
t [h:mm]
Q1
0
10385D22en
Periodic fan kick Minimum
on-time
Periodic fan kick Minimum
on-time
The periodic fan kick time can be selected individually for Comfort mode via P60,
and for Economy mode via P61.
· A fan kick value of 0 means the fan runs continuously in the dead zone.
· A fan kick value OFF means the fan does not run in the dead zone.
Using P15 at the Service level, the fan speed in the dead zone (in Comfort mode)
can be set according to customer preference.
The following options are available:
· Fan does not run in the dead zone (P15=0).
· Fan runs at low speed in heating and cooling mode (P15=1).
· Fan runs at low speed in cooling mode only (P15=2).
The functions "Fan in dead zone" (P15) and "Fan kick" (P60) are combined as
follows:
· P60 = 0 Fan runs continuously in the dead zone, P15 has no influence.
· P60 = OFF Fan operation in dead zone according to P15.
The fan first starts at speed 3 for 1 second to ensure safe fan motor start by
overcoming inertia and friction (selected using P58).
Q
Q3
Q2
Q1
0
T
1 sec
3181D22
When the electric heater is switched off, the fan overruns for 60 seconds (P54) to
either avoid overtemperature of the electric heater or to prevent the thermal cutout
from responding.
In case of fan failure, the thermostat cannot protect the electric heater against
overtemperature. For this reason, the electric heater must be equipped with a
separate safety device (thermal cutout).
Fan operation in dead
zone
(
f
an kick)
Note
s
:
Fan operation in dead
zone P15, Comfort
mode
Fan start
kick
Fan overrun for electric
heater
CAUTION
Fan failure

Siemens RDF800KN Series Specifications

General

Brand	Siemens
Model	RDF800KN Series
Category	Thermostat
Language	English