Installation Instructions

Operating and display functions 8
0020237057_00 Installation instructions 19
Depending on the configuration of the VR 70 or VR 71, there
is one external input for each heating circuit. You can con-
nect an external zone controller, for example, to this external
input.
8.7.22 Reading the heating pump status
Menu → Installer level → System configuration → [HEAT-
ING1 ----] → Pump status
– You can use this function to read the current status (On,
off) of the heating pump for the heating circuit.
8.7.23 Reading the status of the heating circuit
mixer
Menu → Installer level → System configuration → [HEAT-
ING2 ----] → Mixer status
– You can use this function to read the current status
(Opening, Closing, Stationary) of the heating circuit
mixer from HEATING2.
8.8 ZONE1
8.8.1 Deactivating the zone
Menu → Installer level → System configuration → [ZONE1
----] → Zone activated
– You can use this function to deactivate the zone that you
do not require.
All available zones appear on the display if the existing heat-
ing circuits are activated in the Type of circuit function.
Setting the type of circuit (→ Page 16)
8.8.2 Setting the day temperature
Menu → Installer level → System configuration → [ZONE1
----] → Day temperature
– You can use this function to set the required day temper-
ature for the zone.
8.8.3 Setting the set-back temperature
Menu → Installer level → System configuration → [ZONE1
----] → Set-back temp.
– You can use this function to set the required set-back
temperature for the zone.
The set-back temperature is the temperature to which the
heating is to be reduced at times of low heat demand (e.g.
overnight).
8.8.4 Reading the room temperature
Menu → Installer level → System configuration → [ZONE1
----] → Room temperature
– If the controller is installed outside of the heat generator
and is assigned to a zone, you can read the current room
temperature.
The controller has an integrated temperature sensor, which
determines the room temperature.
8.8.5 Assigning a zone
Menu → Installer level → System configuration → [ZONE1
----] → Zone assignment
– You can use this function to assign the unit (controller
or remote control unit) that is installed in the zone to the
selected zone. The control system also uses the room
temperature sensor for the assigned unit.
If you have assigned a remote control unit, the remote con-
trol unit uses all of the values for the assigned zone.
If you do not assign any zones, the Room temp. mod. func-
tion is ineffective.
8.8.6 Reading the zone valve status
Menu → Installer level → System configuration → [ZONE1
----] → Zone valve status
– You can use this function to read the current status of the
zone valve (Open, Closed).
8.9 DHW circuit
8.9.1 Setting the cylinder
Menu → Installer level → System configuration [DHW cir-
cuit ----] → Cylinder
– You can use this function to activate or deactivate a cylin-
der for the hot water circuit.
If a cylinder is connected to the heating installation, the set-
ting must always be active.
8.9.2 Reading the hot watwer circuit's target flow
temperature
Menu → Installer level → System configuration → [DHW
circuit ----] → Target flow temp.
– You can use this function to read the target flow temper-
ature of the hot water circuit.
8.9.3 Setting the cylinder set target temperature
(domestic hot water)
Danger!
Risk of death from Legionella.
Legionella multiply at temperatures below
60 °C.
▶ Ensure that the operator is familiar with all
of the Anti-legionella measures in order
to comply with the applicable regulations
regarding legionella prevention.
Menu → Installer level → System configuration [DHW cir-
cuit ----] → Domestic hot water
Menu → Installer level → System configuration [HEAT-
ING1 ----] → Domestic hot water
– You can use this function to define the set target temper-
ature (Domestic hot water) for a connected domestic
hot water cylinder. Set the set target temperature on the
controller in such a way that the heat demand of the op-
erator is covered.
8.9.4 Reading the current temperature of the
domestic hot water cylinder
Menu → Installer level → System configuration [DHW cir-
cuit ----] → Current cyl. temp.