Operating and display functions 8
0020237057_00 Installation instructions 15
8.4.2 Configuring the inputs and outputs of the
VR 71
Menu → Installer level → System configuration [System
diagram configuration ----] → Config.: VR71
– You can use this function to configure which inputs and
outputs you can use and which functions the inputs and
outputs have.
Each configuration has a unique setting value, which you
need to enter in the Config.: VR71 function. You can find
the set value and the terminal assignment for the selected
system diagram in the system diagram book.
Connecting the sensors to VR 71 (→ Page 37)
Connecting the actuators to VR 71 (→ Page 37)
8.4.3 Configuring the inputs and outputs of the
VR 70
Menu → Installer level → System configuration [System
diagram configuration ----] → Config.: VR70 addr. 1
– You can use this function to configure which inputs and
outputs you can use and which functions the inputs and
outputs have.
Each configuration has a unique setting, which you need to
enter in the Config.: VR70 addr. 1 function. You can find
the set value and the terminal assignment for the selected
system diagram in the system diagram book.
Connecting the actuators and sensors to VR 70 (→ Page 36)
8.4.4 Configuring the VR 70's multi-function
output
Menu → Installer level → System configuration [System
diagram configuration ----] → MA VR70, addr. 1
– You can use this function to set which functions are to be
assigned to the multi-function output.
Connecting the actuators and sensors to VR 70 (→ Page 36)
If you have set configuration 3 (Config.: VR70 addr. 1) for
the VR 70, you cannot set Charg.pump or Leg. pump.
The MA VR70, addr. 1 function does not appear on the
display if the functions of the multi-function output have been
defined by the system configuration.
8.4.5 Configuring the VR 71's multi-function
output
Menu → Installer level → System configuration [System
diagram configuration ----] → MA VR71
– You can use this function to set which functions are to be
assigned to the multi-function output.
Connecting the sensors to VR 71 (→ Page 37)
Connecting the actuators to VR 71 (→ Page 37)
If you have set configuration 3 (Config.: VR71) for the
VR 71, you cannot set TD con.. For configuration 6, you
cannot set Charg.pump, Leg. pump or TD con..
The MA VR71 function does not appear in the display if the
functions of the multi-function output have been set by the
system configuration.
8.5 Additional module
8.5.1 Configuring the multi-function output
Menu → Installer level → System configuration [Addi-
tional module ----] → Multi-funct. output 2
– You can use the multi-function output 2 to control the
circulation pump, dehumidifier or legionella protection
pump.
Depending on the system diagram specified, multi-function
output 2 is specified with a single function, or you can set a
function from a selection of two or three.
8.5.2 Setting the auxiliary heater output
Menu → Installer level → System configuration [Addi-
tional module ----] → Aux. heater output
– If you have connected an aroTHERM, you can use this
function Aux. heater output. You can use this function
to set the level (max. output) at which the auxiliary heater
should work when heat is required.
You can operate the auxiliary heater at three different levels
(outputs).
8.5.3 Configuring the multi-function input
Menu → Installer level → System configuration [Addi-
tional module ----] → Multi-funct. Input
– If a heat pump is connected, you can use the Multi-
funct. Input function. The controller requests the heat
pump's input for this purpose.
– Input for the aroTHERM is: ME of the additional module
VWZ-AI
– Input for the flexoTHERM is: X41, terminal in the func-
tional drawing
If there is a signal at the input of the heat pump, the following
functionalities are possible.
Not conn.: The controller does not activate any functions.
The controller ignores the signal present.
Circ. boost: The operator has pressed the circulation button.
The controller activates the circulation pump for a short time
period.
PV: The connected photovoltaic system generates surplus
current, which is intended to be used for the heating install-
ation. The controller activates the Cylinder boost function
once. If the signal remains at the input, the controller activ-
ates the charging of the buffer cylinder in the heating cir-
cuit. The buffer cylinder is charged to the flow temperature
and an offset, see Setting the offset for the buffer cylinder
(→ Page 14), until the signal at the input of the heat pump
falls again.
