Settable Auxiliary Functions; Auxiliary Functions In The Operator Level; Auxiliary Functions In The Code Level - Vaillant geoTHERM VWS Installation Instructions Manual

8 Control system
Freezing protection function
The outlet temperature of the heat source is constantly
measured. If the heat source outlet temperature falls
below a defined value, the compressor switches off tem-
porarily with error message 20 or 21 (see Chap. 10.4). If
these errors appear three times in succession, a fault-in-
duced shutdown takes place (see Chap. 10.5).
For the geoTHERM VWS heat pumps you can set the
value (Default setting -10 °C) for the freezing protection
in the installation assistant A4.
8.3

Settable auxiliary functions

You can set the following auxiliary functions from the
controller yourself and thus adapt the system to local
circumstances or the operator's wishes.
h Note:
Operation of the controller is sub-divided
into three levels:
- Operator level -> for the operator
- Code level -> for the expert technician
- vrDIALOG -> for the expert technician
8.3.1

Auxiliary functions in the Operator Level:

Time programme
You can set the heating times for each heating circuit.
You can store up to three heating periods per day or
per block (Block = Mon - Fri or Mon - Sun or Sat - Sun).
See Table 8.3, Menu 3 "Timer programs".
Holiday programming
You can programme two holiday periods with date
entry. You can additionally define the set-back tempera-
ture to which the system should be regulated during the
period of absence.
See Table 8.3, Menu 4 "Holiday programming".
Party function
The party function permits you to extend the current
heating and hot water periods beyond the next switch-
off time, to the start of the next heating period.
See Chap. 8.9.
Energy-saving function
This function allows you to set back the heating for an
adjustable period of time.
See Chap. 8.9.
46

8.3.2 Auxiliary functions in the Code Level:

Floor drying
You can dry out a freshly laid screed floor using this
function in accordance with Table 8.1. The flow tempera-
ture corresponds to a routine stored in the controller
and is independent of the outside temperature. All the
selected operating modes are interrupted when this
function is activated. See Table 8.4, Menu C6.
Day after
starting the Target flow temperature for this day
function
Starting 25 °C
temperature 25 °C
1 30°C
2 35 °C
3 40°C
4 45 °C
5 – 12 40°C
13 35 °C
14 30°C
15 25 °C
16 10°C
17 – 23 (frost protection function,
pump in operation)
24 30°C
25 35 °C
26 40°C
27 45 °C
28 35 °C
29 25 °C
Table 8.1 Progress of the screed floor drying
The operating mode is displayed together with the cur-
rent day and the target flow temperature. The current
day can be set manually.
If the brine circuit is not yet finished, the drying of the
screed floor can be accomplished by means of the auxi-
liary heating. In order that the drying of the screed floor
can take place by means of the auxiliary heating, select
the value "ZH only" for the "Heating mode" parameter
in Menu C7, "Auxiliary heating".
a
Caution!
Overloading of the heat source!
If too much energy is extracted from the
heat source while drying out a floor (e.g.
in the winter months), the source can be
overloaded and its
regeneration impaired.
When the function is started, the current time of the
start is saved. The day is changed exactly at this time.
After network-off/-on, the floor-drying begins as follows:
Installation instructions geoTHERM VWS 0020046310_01