22
Installation - for qualified contractors
9.2
Water installation
◦
A safety valve is not required.
» Flush the water line thoroughly.
»
Ensure that the flow rate (see chapter “Specification /
Data table”, On) for switching on the appliance is
achieved.
If the flow rate is not achieved, remove the
flow limiter (see chapter “Installation / Removing the
flow limiter”).
» Increase the mains water pressure if the required
flow rate is not achieved with the draw-off valve fully
opened.
Taps
Use appropriate pressure taps. Open taps are not per-
mitted.
Note
Never use the shut-off valve in the cold water inlet
to reduce the flow rate.
It is intended to shut off the
appliance.
Permissible water pipe materials
◦
Cold water inlet pipe:
Galvanised steel pipe, stainless steel pipe, copper
pipe or plastic pipe
◦
DHW outlet pipe:
Stainless steel pipe, copper pipe or plastic pipe
!
Material losses
If plastic pipework systems are used, take into ac
-
count the maximum inlet temperature and the max
-
imum pressure (see chapter “Specification / Data
table”).
Flexible water connection lines
»
If the appliance is installed with flexible water con
-
nection lines, ensure that the bayonet fittings of
the pipe bends do not become twisted inside the
appliance.
» Secure the back panel at the bottom with two addi-
tional screws.
10.
Installation
10.1
Standard installation
◦
Electrical connection from above; installation on un-
finished walls
◦ Water connection, installation on unfinished walls
◦
DDLE LCD 18/21/24: Connected load 21 kW preset
For further installation options, see chapter “Installation
alternatives”:
◦ Electrical connection from below on unfinished walls
◦ Electrical connection for finished walls
◦
Connecting a load shedding relay
◦
Undersink installation, water connections – from
above
◦ Water installation for finished walls
◦
Operation with preheated water
◦
Temperature limit
Opening the appliance
D
00000
41
61
5
» Open the appliance by releasing the snap lock.
NT
T-
so
X1
26
_0
2_0
2_0
76
2
» Remove the back panel by pressing the two locking
hooks and pulling the lower part of the back panel
forwards.
Preparing the power cable
160
≥ 30
26
_0
2_0
2_0
88
7
Fitting the wall mounting bracket
26
_0
2_0
2_0
97
2
» Mark out the holes for drilling with the installation
template. If the appliance is to be installed with water
connections on finished walls, also mark out the fix
-
ing holes on the lower part of the template.
» Drill the holes and secure the wall mounting bracket
with 2 screws and 2 rawl plugs (screws and rawl
plugs are part of the standard delivery).
» Fit the threaded stud provided.
» Mount the wall mounting bracket.
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