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 Temperature selector with LCD
2 Device cap
3 Lower section, back panel
4 DHW compression fitting
5 Cold water compression fitting
6 Top, back panel
7 Electronics
8 Coding card for output selection for
the DDLE LCD 18/21/24
9 LED diagnostic "traffic light" for operating
and fault indications
10 Plug-in position from the temperature
selector cable
11 Safety pressure limiter (AP 3) with reset
button
12 Mains terminal
13 Knock-out for power connection from above
14 Fixing toggle
15 Outlet sensor
16 High limit safety cut-out (STB) with reset
button
17 Heating system
2.2
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
Important information
!
2.4
Instructions and regulations
equipment, must only be carried out by a qualified contractor in accordance with these instructions.
intended for this equipment.
26
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A
O
18 Flow sensor
19 Temperature selector plug "set T"
20 Type plate
21 Mounting bracket
22 Stud for mounting bracket
23 Cable grommet (power cable from above/below)
24 Twin nipple (cold water with shut off valve)
25 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 Installation template
30 Sieve
31 Flow limiter
32 Profile washer
33 Support panel