Checking The Filling Pressure In The Heat Pump Circuit; Setting The Heating Flow Temperature; Setting The Domestic Hot Water Temperature; Switching Off The Product's Functions - Vaillant VWL 57/5 IS Operating, Installation And Maintenance Instructions

5 Care and maintenance

4.4.10 Serial number and article number
Menu → Information → Serial number
The product's serial number is displayed.
The article number is found in the second line of the serial
number.
4.4.11 Contact details for the competent person
Menu → Information → Contact data Phone number
If the competent person has entered their telephone number
during the installation, you can read it here.
4.5 Checking the filling pressure in the heat
pump circuit
Note
To avoid operating the installation with insufficient
water volume and to prevent possible damage
associated with this, the product is fitted with a
pressure sensor and a digital pressure display.
To ensure that the heating installation operates
properly, the filling pressure must be between 0.1
MPa and 0.15 MPa (1.0 bar and 1.5 bar) when the
heating installation condition is cold.
If the heating installation extends over several
storeys, a higher filling pressure may be required
for the heating installation. Ask a competent per-
son for details.
Note
If the pressure falls below 0.07 MPa (0.7 bar),
message M32 appears.
If the pressure rises above 0.07 MPa (0.7 bar),
message M32 goes out.
In addition, the
prox. one minute.
If the filling pressure of the heating installation
falls below 0.05 MPa (0.5 bar) for longer than one
minute, fault message F.22 and the current filling
pressure appear alternately in the display.
If the blocking time has elapsed or if the filling
pressure of the heating installation rises above
0.05 MPa (0.5 bar), fault message F.22 goes out.
1. Use Menu Live Monitor Water pressure to display the
filling pressure in the heat pump circuit.
2. If the pressure drops frequently, identify and eliminate
the reason for the pressure loss of heating water. In-
form a competent person of this.
8
symbol is displayed after ap-
4.6

Setting the heating flow temperature

▶
See the table in the appendix.
Overview of the end user operating level
4.7

Setting the domestic hot water temperature

▶
See the table in the appendix.
Overview of the end user operating level
4.8

Switching off the product's functions

4.8.1 Frost protection function
Caution.
Risk of material damage due to frost.
The frost protection function cannot guaran-
tee circulation through the entire heating in-
stallation. Under certain circumstances, there
is therefore a risk of frost to certain parts of
the heating installation, which may cause
damage.
▶
During a period of frost, ensure that the
heating installation remains in operation
and that all rooms are sufficiently heated,
even when you are away.
To ensure that the frost protection devices are permanently
ready for operation, you must leave the system switched on.
Another way to protect the heating installation and the
product from frost for very long switch-off periods is to drain
them completely.
▶
Consult a competent person about this.
4.8.2 Switching off heating mode (Summer mode)
▶
Observe the instructions for the system control.
4.8.3 Switching off domestic hot water generation
▶
Observe the instructions for the system control.
5 Care and maintenance
5.1

Caring for the product

▶
Clean the casing with a damp cloth and a little solvent-
free soap.
▶
Do not use sprays, scouring agents, detergents, solvents
or cleaning agents that contain chlorine.
Operating instructions Hydraulic station 0020257319_02