Vaillant geoTHERM VWS Series, Installation Instructions Manual

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Installation instructions geoTHERM VWS/VWW 0020057444_01
8.4.3 Buffer cylinder charging principle
The buffer cylinder is controlled depending on the set-
point flow temperature. The heat pump heats when the
temperature measured by the sensor at the top of the
buffer cylinder, VF1, is lower than the setpoint tempera-
ture. It heats until the temperature measured by the
sensor at the base of the buffer cylinder, RF1, has
reached the setpoint temperature plus 2 K.
With reference to heating the DHW cylinder, the buffer
cylinder is likewise heated when the temperature of the
sensor at the top of the cylinder, VF1, is less than 2 K
above the setpoint temperature (early reheating):
VF1 < T VL se 2 K.
8.4.4 Resetting to factory settings
a
Caution!
Inadvertent deletion of specific settings!
When you reset the control system to
the default settings, specific system
settings can be deleted and the system
can sut down. The system cannot be
damaged.
• Press both dials simultaneously for at least 5 seconds
in the top-level display of the graphics display.
After that you can select whether to reset only the
timer programs, or all values, to the default settings.
8.4.5 Controller organisation
The top level display is a graphics display . It is the
starting point for all the available screens. This display
reappears automatically if you do not actuate any of the
dials for a long time when setting values.
In the following illustrations you can see all the control-
ler screens in an overview in the form of a flow chart.
You will find descriptions of the individual screens in the
sections that follow them.
Controller operation is subdivided into three levels:
The Operator level is intended for the operator.
The Code level (Menus C1 - C9, D1 - D5, I1 - I5 and
A1 - A9) is reserved for the specialist and is protected
against unintentional adjustments by means of a code
input.
The following parameters can be displayed in the indi-
vidual menus, but the values cannot be changed if no
password is entered, i. e. access to the code level is dis-
abled.
In Menus C1 to C9 you can set parameters for the vari-
ous functions of the heat pump for the heating circuit.
In Menus D1 to D5 you can operate and test the heat
pump in diagnostic mode.
In Menus I1 to I5 you can obtain general information re-
garding the settings for the heat pump.
In Menus A1 to A9 you are guided through the installa-
tion menu during the initial commissioning of the heat
pump.
Furthermore it is possible to display and select special
functions, such as the energy saving function. To do
this, press the dial once , twice, or three times, starting
from the top-level display (see Fig. 8.1).
The third level contains functions for optimising the sys-
tem and can only be set by a specialist using
vrDIALOG 810/2 (see Chap. 8.10).
Controller 8