Siemens RDG2 KN Series Basic Documentation

Functions
Fan control
4
A6V11545892_en--_c
109 | 180
● The output for the 1
st
stage (YHC1) in heating mode is also the 1
st
stage in
cooling
● This function is available for DC/3-speed/1-speed fans
We recommend enabling the swap function on applications with fan coil units and
floor heating/cooling. In this application, the fan runs during cooling demand (fan
coil unit and floor cooling) and only in the 2
nd
heating stage (with the fan coil unit).
Set P254 to On or Off, depending on the selected control signal (swap function),
and set P350 to 4 (fan in the 2
nd
stage).
The fan runs during heating demand and only in the 2
nd
cooling stage, e.g. for
applications with fan coil units and radiant heating/cooling panels.
This setting is available only when P350 is set to 5, and the swap function is
selected (P254 to On or Off).
Example 2:
P350=4
Example 3:
P350=5
Heating mode
Cooling mode
● Swap function: The output for the 1
st
stage in heating mode is the 2
nd
stage for
cooling
● This function is available for DC/3-speed/1-speed fans
The following table shows the relation between fan behavior (switching range fan
XpH
Fan
/XpC
Fan
as per reference table or proportional band XpH/XpC) for 2-pipe / 2-
stage applications depending on the selected output signals and synchronization of
the fan to the first or second sequence.
Combination
1
st
stage
signal
2
nd
stage
signal
Fan
type
Fan
synchro
Fan behavior
1
On/off
On/off
DC
1
st
sequence
XpH
Fan
/XpC
Fan
,
P-control
2
DC
DC
DC
1
st
sequence
XpH/XpC,
P/PI control
3
On/off
On/off
DC
2
nd
sequence
XpH
Fan
/XpC
Fan
,
P-control
4
DC
DC
DC
2
nd
sequence
XpH/XpC,
P/PI control
5
On/off
DC
DC
1
st
sequence
XpH
Fan
/XpC
Fan
,
P-control
Notes
Example 2
Example 3
Notes
Examples, other
combinations

Siemens RDG2 KN Series Specifications

General

Brand	Siemens
Model	RDG2 KN Series
Category	Thermostat
Language	English