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6 Care and maintenance
14 Operating instructions geoTHERM 0020250185_00
Menu Information Total operating
hours
In each case, you can display the oper-
ating hours for the heating mode, the do-
mestic hot water mode, the cooling mode
and the overall operation.
5.11 Displaying contact data
Menu Information Contact details
If your competent person has entered
their telephone number during the in-
stallation, you can read this data under
Contact data.
5.12 Displaying the serial number
and article number
Menu Information Serial number
The unit's serial number is displayed.
The article number is found in the
second line of the serial number.
Note
The serial number can also be
found on a plate, which is in a
plastic fish plate behind the front
flap on the underside of the unit.
5.13 Setting the display contrast
Menu Basic settings Display con-
trast
You can use this function to adjust the
display contrast to suit your needs.
5.14 Calling up the installer level
Caution.
Risk of damage caused by
incorrect handling.
Incorrect settings may cause
damage to the heating installa-
tion.
Only make settings in the in-
staller level if you are author-
ised to do so.
The installer level is reserved for the com-
petent person and secured against unau-
thorised access with a password because
incorrect parameter settings at this level
may cause malfunctions and damage to
the heating installation.
5.15 Setting the target flow
temperature in heating mode
in a system control
The target flow temperature is automatic-
ally set by the system control (you can find
further information about this in the operat-
ing instructions for the system control).
6 Care and maintenance
6.1 Maintenance
An annual inspection and biennial main-
tenance of the product carried out by a
competent person is a prerequisite for
ensuring that the product is permanently
ready and safe for operation, reliable,
and has a long service life. The inspec-
tion may require maintenance to be carried
out earlier, depending on the results.
6.1.1 Concluding an inspection and
maintenance contract
Vaillant recommends that you sign an in-
spection and maintenance contract.
6.2 Fulfilling requirements for the
installation site
The installation site must be dry and frost-
proof throughout.
You are not permitted to make any sub-
sequent structural alterations which
may result in a reduced room volume
or a change to the temperature at the
installation site.
14


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