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For contractors
2.
Installation instructions
Only trained and authorised experts must install the device and make the electrical connection under full
observance of these installation instructions.
2.1
Equipment layout
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
2.2
A - O
Temperature selector with LCD
Device cap
Lower section, back panel
DHW compression fitting
Cold water compression fitting
Top, back panel
Electronics
Coding card for output selection for
the DDLE LCD 18/21/24
LED diagnostic “traffic light” for operating
and fault indications
Plug-in position from the temperature
selector cable
Safety pressure limiter (AP 3) with reset
button
Mains terminal
Knock-out for power connection from above
Fixing toggle
Outlet sensor
High limit safety cut-out (STB) with reset
button
Heating system
18
19
20
21
22
23
24
25
Flow sensor
Temperature selector plug “set T”
Type plate
Mounting bracket
Stud for mounting bracket
Cable grommet (power cable from above/below)
Twin nipple (cold water with shut off valve)
Flat packing
26 Screws/rawl plugs for fixing the back panel in
case of water connection on finished walls
27 Flow limiter, only for theDDLE LCD 18/21/24
(secured to the cold water pipe)
28 Installation and operating instructions
29
30
31
32
33
Installation template
Sieve
Flow limiter
Profile washer
Support panel
Brief description
This electronically regulated instantaneous water heater is a pressure device for the heating of cold water to
DIN 1988 / EN 806 that can supply one or several draw-off points.
The bare wire heating system is suitable for hard and soft water areas (for application range, see
"5.2 Application areas").
2.3
!
2.4
Important information
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4HESECONTAINIMPORTANTINFORMATIONREGARDINGSAFETYOPERATIONINSTALLATIONANDMAINTENANCEOFTHIS
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Instructions and regulations
s 4HEINSTALLATIONWATERANDELECTRICALWORKANDCOMMISSIONINGASWELLASTHEMAINTENANCEOFTHIS
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26