Siemens DF301 Basic Documentation page 49

Look-up table with
ON/OFF control
1-speed / 3-speed fan
Fan operation as per
heating / cooling mode,
or disabled
Fan minimum
on- time
Fan operation in dead
zone (fan kick)
Fan operation in dead
zone P15, Comfort
mode (RDF600KN...)
Siemens.........................RDF301, RDF301.50..., RDF600KN, RDF600KN/VB, RDF600KN/S
Smart Infrastructure
SDH/SDC [K] 0.5
XpH /XpC [K] 2
Fan Fan
The thermostat can control a 1- or 3-speed fan (selected via control parameter
P53). A 1-speed fan is connected to terminal Q1, a 3-speed fan to terminals Q1,
Q2 and Q3.
Fan operation can be limited to be active with cooling only or heating only, or even
be totally disabled via control parameter "Fan operation" P52.
When fan operation is disabled, the fan symbol on the display disappears and
pressing the fan button has no impact.
This function allows you to use the thermostat on universal applications such as
chilled / heated ceilings and radiator, etc. (see section 3.6.6).
In automatic mode, a dwelling time of 2 minutes (factory setting) is active. The fan
maintains each speed for at least 2 minutes before it changes to the next speed.
This minimum on-time can be adjusted from 1...6 minutes via parameter P59.
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
Q1
0
Periodic fan kick
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 "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).
XpH
"Heating"
XpC
"Cooling"
1.0 1.5 2.0 2.5
3 4 5 6
Minimum Periodic fan kick
on-time
Basic Documentation
Switching range for fan
Fan
Switching range for fan
Fan
3.0 3.5 4.0 >4.5
7 8 9 10
10385D22en
t [h:mm]
Minimum
on-time
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2020-02-21
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