Calling Up The Installer Level; Heating Mode Flow Temperature Regulation; Calling Up Statistics; Checking That The Product Works Correctly - Vaillant flexoTHERM exclusive VWF 57/4 Installation And Maintenance Instructions Manual

10 Adapting the unit to the heating installation

contain any spaces. If the telephone number is shorter, end
the entry after the last digit by pressing
All of the digits to the right will be deleted.
9.3.8 Ending the installation assistant
▶
Once you have run through the installation assistant suc-
cessfully, confirm by pressing
◁
The installation assistant will close and will not launch
again when the product is next switched on.
9.4

Calling up the installer level

1.
Press and at the same time.
Navigate to Menu → Installer level and confirm by
2.
pressing (OK).
3.
Set the value 17 (code) and confirm by pressing
9.5

Heating mode flow temperature regulation

For economical and fault-free operation of a heat pump, it is
important to regulate the start of the compressor. Using the
energy balance control, it is possible to minimise the num-
ber of heat pump start-ups without having to forgo the con-
venience of a comfortable room environment. As with other
weather-controlled heating controllers, the controller determ-
ines a target flow temperature by recording the outside tem-
perature using a heating curve. The energy balance calcu-
lation is made on the basis of this target flow temperature
and the actual flow temperature – the difference per minute
is measured and added up:
1 degree minute [°min] = 1 K temperature difference in the
course of 1 minute
The heat pump starts up at a defined heat deficit (under the
menu point Configuration→ Compressor starts at) and
only switches off again when the supplied heat is equal to
the heat deficit. The larger the preset negative numerical
value, the longer the periods for which the compressor op-
erates or does not operate.
As an additional condition, if there is a deviation of more
than 7 K between the actual flow temperature and the target
flow temperature, the compressor is directly switched on and
switched off. The compressor always starts immediately if a
heating demand only just arises from the controller (e.g. due
to a time period or switching the gas-fired boiler operation to
heat pump mode).
Time conditions for compressor operation
The following shall always apply for operation:
–
Minimum running time: 3 minutes
–
Minimum rest period: 7 minutes
–
Minimum time from start to start: 20 minutes
30
.
.
.
Installation and maintenance instructions flexoTHERM exclusive 0020213395_00
9.6

Calling up statistics

Menu → Installer level → Test menu → Statistics
–
You can use this function to call up the statistics for the
heat pump.
9.7

Checking that the product works correctly

1. Start up the product in accordance with the relevant
operating instructions.
Navigate to Menu → Installer level → Test menu →
2.
Check programs.
3. Check the heating mode.
4. Check the hot water handling mode.
5. Check the cooling mode.
10 Adapting the unit to the heating
installation
10.1

Setting parameters

The installation assistant is launched when the product is
switched on for the first time. When the installation assistant
is complete, you can further adjust the parameters of the in-
stallation assistant, for example, in the Configuration menu.
Menu → Installer level Configuration
10.2

Setting the high-efficiency pumps

10.2.1 Setting the building circuit pump
Automatic mode
At the factory, the nominal flow is automatically achieved by
volume flow regulation. This volume flow regulation allows
for efficient operation of the building circuit pump because
the pump speed is adjusted to the hydraulic resistance of the
system. Vaillant recommends that you retain this setting.
Manual mode
Menu → Installer level → Configuration → Conf. heat.
build. pump
Menu → Installer level → Configuration → Conf. cool.
build. pump
Menu → Installer level → Configuration → Conf. DHW
build. pump
If you do not want to operate the pump in automatic mode,
you can set it to manual mode in the Configuration menu
for different operating modes. The diagrams below show
how setting the pump actuation affects the remaining feed
head at nominal flow for a temperature spread of 5 K on the
heating side.
Setting the maximum differential pressure in the
building circuit
Menu → Installer level → Configuration → Max. remaining
feed head
If the differential pressure in the building circuit is not per-
mitted to exceed a maximum value, this limit can be set in
the Configuration menu within the range of 0.02 to 0.1 MPa
(200 to 1000 mbar).