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Installation – for qualied contractors
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 qualied contractor in accord-
ance with these instructions.
Perfect function and safe operation can only be
assured when using original accessories and spare
parts intended for this equipment.
Observe all locally applicable instructions and regu-
lations regarding water and electrical connections.
Observe all regulations of your local water and elec-
tricity supply utilities.
The specic 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 resistance 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 protection IP 25 (hoseproof) can only be en-
sured with a correctly tted cable grommet.
7.2 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 60 °C. In
case of faults, loads up to 95 °C / 1.2 MPa can occur
temporarily in the installation. Any plastic pipework
used must be suitable for these conditions.
A safety valve in the hot water pipe is not
permissible.
Never use taps/valves for open vented equipment.
If you are using thermostatic valves, observe chapter
Recommended settings.
The appliance is suitable for preheated water up to
60 °C.
The maximum permissible supply temperature is
60 °C. The appliance can be damaged by higher
temperatures. With the “central thermostat” (see
chapter “Special accessories”), the maximum sup-
ply temperature can be limited to 60 °C.
7.3 Electrical installation
The power supply must be connected permanently.
The appliance must be able to be separated from
the mains power supply, for example by fuses that
disconnect all poles with at least 3 mm contact
separation.
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