0020313974_00 Compact Operating instructions 9
◁ The target domestic hot water tem-
perature is displayed.
Condition: Control connected
▶ Switch off heating mode on the control
(→ Control operating instructions).
6 Care and maintenance
6.1 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.
6.2 Maintenance
An annual inspection of the product carried
out by a competent person is a prerequis-
ite for ensuring that the product is perman-
ently ready and safe for operation, reliable,
and has a long working life.
6.3 Guaranteeing
the filling pressure of the
heating installation
6.3.1 Checking the filling pressure of
the heating installation
1. In the basic display, press three
times.
◁ The display shows the current filling
pressure value.
◁ The symbol flashes in the
display.
2. Check the filling pressure in the
display.
3. If the filling pressure is lower than
0.5 bar (0.05 MPa), top up the heating
installation. (→ Page 9)
Note
If the heating installation ex-
tends over several storeys, a
higher filling pressure may be
required for the heating install-
ation. Ask a competent person
for details.
6.3.2 Topping up the heating
installation
Note
Filling the heating installation de-
pends on the actual installation
configuration. If the following steps
are not suitable for the installation,
contact a competent person.
1. Use a hose to connect the filling tap to
a cold water pipe.
2. Open all thermostatic radiator valves in
the heating installation.
3. Open the cold water pipe's water tap.
4. Turn the installation's filling tap on
slowly, fill with water until the required
system pressure is reached, and then
close the filling tap again.
– Required system pressure: 1.0 to
1.4 bar (0.10 to 0.14 MPa)
5. Close the cold water pipe's water tap.
6. Purge all of the radiators at the con-
nection provided (top left or right on the
radiator).