INSTALLATION
7. Safety
7.1
Instructions and regulations
◦ All steps until the commissioning is completed as
well as the maintenance of this appliance must only
be carried out by a qualified contractor in accord-
ance with these instructions.
◦ Perfect function and operational safety can only be
assured when using original accessories and spare
parts intended for this appliance.
◦ Observe all locally applicable instructions and reg-
ulations regarding water and electrical connections,
such as.
◦ Observe all regulations of your local water and
power supply utilities.
◦ The specific electrical resistance of the water used
must not fall below that stated on the type plate. In a
linked water network, observe the lowest electrical
water resistance (see chapter "Application areas").
Your water supply utility will advise you of the specif-
ic electrical water resistivity or conductivity.
◦ Install the appliance only in an enclosed room free
from the risk of frost. Store the dismantled appliance
in a room free from the risk of frost, as water resi-
dues remain inside the appliance.
◦ The IP 25 (hoseproof) rating can only be ensured
with a correctly fitted cable grommet.
WARNING Electrocution
This appliance contains capacitors which are dis-
charged when disconnected from the power supply.
The capacitor discharge voltage may briefly reach
> 60 V DC.
7.2
Shower operation
CAUTION Burns
» When supplying a shower, set the internal tem-
perature limit to 55 °C or lower; see chapter "Ap-
pliance description / Customer service mode /
Anti-scalding protection / Temperature limit
menu".
CAUTION Burns
If the water supplied to the appliance is preheated,
please note the following:
The internally adjustable temperature limit may be
exceeded.
» Limit the temperature with an upstream central
thermostatic valve.
7.3
Water installation
◦ Cold water line
Permissible materials: Galvanised steel pipe, stain-
less steel pipe, copper pipe or plastic pipe.
◦ DHW line
Permissible materials: Stainless steel pipe, copper
pipe or plastic pipe.
◦ Operating temperatures can reach up to 65 °C. If a
fault arises, loads of up to 95 °C / 1.2 MPa can tem-
porarily occur in the installation. Any plastic pipework
used must be suitable for these conditions.
◦ Safety valves are not permissible in the DHW line of
the instantaneous water heater.
◦ Never use taps/valves for open vented appliances.
◦ If you are using thermostatic valves, observe chapter
Recommended settings.
Note
The appliance is suitable for preheated water up to
65 °C.
The maximum permissible inlet temperature is 65 °C.
Higher temperatures may damage the appliance.
With the "central thermostat" (see chapter "Special
accessories"), the maximum inlet temperature can
be limited to 65 °C.
7.4
Electrical installation
◦ The power supply must be connected permanently.
◦ The appliance must be able to be separated from the
power supply, for example by fuses that disconnect
all poles with at least 3 mm contact separation.
Installation
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