Setting The Anti-Legionella Function; Calling Up The Installer Level; Checking The Configuration; Calling Up Statistics - Vaillant VWL Series Operating Instructions Manual

8 Start-up
8.9

Setting the anti-legionella function

▶
Set the anti-legionella function using the system control.
To ensure sufficient anti-legionella protection, the electric
back-up heater must be activated.
Condition: Internal electric back-up heater deactivated or external back-up
heater
The anti-legionella function can be used without a back-up
heater in the outdoor temperature range of -10 °C to +30 °C;
outside of this temperature range, the function can only be
used with an activated internal or external back-up heater.
An external back-up heater must be protected against over-
heating, for example, so that it is intrinsically safe. An extern-
al back-up heater must be connected to contact X14 via a
cut-off relay. On the indoor unit's control, the setting must be
converted to the external back-up heater under MA relay.
Menu → Installer level → Configuration.
8.10

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 and confirm by pressing
8.11

Checking the configuration

You can recheck and set the most important system para-
meters. Call up Configuration to configure the menu item.
Menu → Installer level → Configuration.
8.12

Calling up statistics

Menu → Installer level → Test menu → Statistics
You can use this function to call up the statistics for the heat
pump.
8.13 Displaying the filling pressure in the building
circuit
The product has a pressure sensor in the heating circuit and
a digital pressure display.
▶
Select Menu Live Monitor to display the filling pressure
in the building circuit.
8.14

Checking function and leak-tightness

Before you hand the product over to the end user:
▶
Check that the heating installation (heat generator and
system) and the domestic hot water pipes are leak-tight.
▶
Check whether the drain pipework for the purging con-
nections has been installed correctly.
8.14.1 Checking the heating mode
▶
Start check programme P.04.
36
8.14.2 Checking the domestic hot water generation
▶
Check whether the cylinder is purged and the domestic
hot water temperature is reached.
8.15

Floor drying

Caution.
Risk of damage to the product caused by
impermissible purging
Without purging the heating circuit, the sys-
tem may become damaged.
▶
You can use this function to "dry heat" freshly laid screed
in accordance with the construction regulations, according
to a defined time and temperature schedule. To do this, the
outdoor unit must be available and connected. The system
control does not have to be connected for this.
It is activated via Installer level → Resets. See overview of
the installer levels in the appendix.
.
When screed drying is activated, all the selected operating
modes are interrupted. The function controls the flow tem-
perature of the controlled heating circuit according to a pre-
set programme, regardless of the outdoor temperature.
The display shows the target flow temperature. You can
manually set the current day.
Days after starting the func-
tion
1
2
3
4
5
6–12
13
14
15
16
17–23
24
25
26
27
28
29
The day is always changed at 00:00, irrespective of when
the function starts.
After a mains Off/On, screed drying starts with the last active
day.
The function ends automatically when the last day of the
temperature profile has elapsed (day = 29) or if you set the
start day to 0 (day = 0).
Installation and maintenance instructions Hydraulic Station 0020291544_01
If the screed drying is activated without a
system control, purge the system manu-
ally. No automatic purging takes place.
Target flow temperature for
this day [°C]
25
30
35
40
45
45
40
35
30
25
10 (frost protection function,
pump in operation)
30
35
40
45
35
25