Extension module
Line no. Operating line
6020
6021
Function extension modules 1 and 2
None
Multifunctional
Cooling circuit 1
Heating circuit 2
Solar DHW
Primary controller / system pump
DHW primary controller
Instantaneous DHW heater
Connection terminal on module
QX21 QX22 QX23 BX21 BX22 H2
Multifunctional
* * * * * *
Cooling circuit 1
Y23 Y24 Q24 B16 * *
Heating circuit 2
Y5 Y6 Q6 B12 * *
Solar DHW
* * Q5 B6 B31 *
Primary controller / system
pump
Y19 Y20 Q14 B15 * *
DHW primary controller
Y31 Y32 Q3 B35 * *
Instantaneous DHW heater
Y33 Y34 Q34 B38 B39
F
S
* Freely selectable in Q…/ BX...
FS = flow switch
Multifunctional
Functions that can be assigned to the multifunctional inputs / outputs appear on
operating lines 6030, 6031, 6032 and 6040, 6041.
Cooling circuit 1
For this application, the respective settings of menu "Cooling circuit 1" can be adapted.
Heating circuit 2
For this application, the respective settings of menu "Heating circuit 2" can be adapted.
Solar DHW
For this application, the respective settings of menu "Solar" can be adapted.
Primary controller / system pump
For this application, the respective settings of menu "Primary controller / system pump"
can be adapted.
DHW primary controller
For this application, the respective settings of menu "DHW storage tank" can be
adapted.
Instantaneous DHW heater
For this application, the respective settings of menu "Instantaneous DHW heater" can
be adapted.
Frost protection on the extension module
Heating circuit
Frost protection for the heating circuit on the extension module operates the same way
as frost protection for the heating circuit co
nnected to the controller (see page 97).
Frost protection for the plant (see page 194) also acts on the heating circuit of the
ex
tension module.
189/258
Siemens Switzerland Ltd User manual RVS61.843, RVS41.813 CE1U2355en_02
HVAC Products 6 The settings in detail 28. September 2009
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