Technical data

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.
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
parameter P60, and for Economy mode via parameter P61.
Note: Fan kick value "0" means the fan runs continuously in the dead zone.
Fan kick value 1 and higher: value in minutes
Fan kick value "OFF" means the fan does not run in the dead zone.
Via parameter P15 in "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
When the fan starts from standstill, it starts at speed 3 for 1 second to ensure safe
fan motor start by overcoming inertia and friction (selected via parameter P58).
Q
Q3
Q2
Q1
0
T
1 sec
3181D22
When the electric heater is switched off, the fan overruns for 60 seconds
(parameter P54) to avoid overtemperature of the electric heater or 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 feature a separate
safety device (thermal cutout).
Y
t [h:mm]
Q1
0
Fan kick P60, P61
Fan operation in dead
zone P15 (RDG160KN)
Fan start
Fan overrun for electric
heater
Fan failure
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Siemens RDG100KN, RDG160KN Basic documentation CE1P3191en
Building Technologies Functions 2014-05-23