12
7.3 Water hardness
The recommended water hardness is 5-6
0
e. Use water softening system into the
feed pipes depending on water hardness.
7.4 Water heating
To choose the perfect hot-water storage tank - taking additional tapping points and
simultaneous usage into consideration - it is essential to assess the specific demand
(e.g. in accordance with DIN 4708-2*). If the hot-water temperature in the hot-
water storage tank is set higher than 60
0
C, a thermostatic water mixer must be
connected in series after the storage tank (e.g. with a solar-heated boiler). If the
project requires regular thermal disinfection to be carried out, the customer must
provide a relevant (manually or automatically operated) bypass of the thermostatic
water mixer.
7.5 Floor drain
Drainage capacity/connected rating 0.9 l/sec. Drainage pipe DN 50*.
7.6 Maintenance
The integrated type BA system divider (back flow prevention) as per EN 1717* has
to be serviced on a regular basis by a professional plumber. The correct function
has to be checked after the first year and periodically thereafter, depending on use
conditions, but at least once a year. A test report is to be written. The filters in the
angle valves as well as all other filters have to be cleaned once a year and replaced if
necessary.
7.8 Electrical
Only connect to the electricity supply when the device is voltage-free. Electrical
installation must be carried out by a professional specialist, in accordance with
VDE 0100*. Please conform to national statutory regulations, where different. The
installation of the connecting cable and concealed rough parts for electronic
control elements has to occur at the same time that the pre-wall is closed. Only use
original Dornbracht components to connect the devices. The maximum distance
between the sub-distribution board or main board and FOOT BATH
ATT
is 14 m.
The customer must provide the following circuit breakers and electrical
components:
