8
3.1 General installation infor-
mation
The equipment is prepared at the fac-
tory for standard installation (see fi gs.
C
-
I
):
• Installation above a worktop
C
(a).
• Water connection, unfinished walls, com-
pression fitting
G
(4 and 5).
• Electrical connection, unfinished walls, in
the lower equipment area
F
(6).
3.2 Place of installation
Install the DHE vertically in accordance with
C
(a – above or b – below worktop) in a
room free from the risk of frost.
3.3 Equipment preparation
for installation
• Open the appliance
D
:
a Open the flap downwards.
b Release the fixing screws.
c Remove the equipment cap.
• Remove the back wall base
E
:
a Press down both snap-in tabs.
b Remove the back wall base by pulling
forwards.
• Remove the fixing toggle
F
(13) .
3.4 Securing the mounting
bracket
F
• Mark out the fixing holes for the moun-
ting bracket using the installation template
supplied.
• Secure the mounting bracket with 2
screws and rawl plugs (not supplied;
selection subject to the material of the
relevant wall).
3.5 Trimming the power
cable to size
Trim the power cable to size in accordance
with
H
.
Note:
Cap (a) should be used as an aid for installing
the power cable.
3.6 Equipment installation
F
• Route the power cable through the cable
grommet (6) and press the back wall over
the threaded studs of the mounting bra-
cket.
• Fit the equipment, secure the fixing toggle
(14).
3.7 Water connection
G
Important information:
Thoroughly fl ush the cold-water sup-
ply pipe.
Always incorporate the strainer supplied
(19, bag on the cold-water fi tting) into
the cold-water compression fi tting. When
replacing the installation, check that the
strainer is in place.
If the correct function cannot be assured
because the fl ow pressure is too low, e.g.
< 0.2 Mpa (< 2 bar), replace the fl ow li-
miter (20) with the washer supplied (21);
if necessary, increase the water supply
pressure.
Please note:
Never replace the fl ow limiter (20) with
the washer (21) when using a thermo-
static valve.
Never use the three-way shut-off valve (5)
to reduce the fl ow rate.
3.8 Electrical connection
Connect the electrical supply cable to the ter-
minal strip (see Wiring diagram
I
).
Important information:
The protection level IP 25 (hose-
proof) can only be ensured with a cor-
rectly fi tted cable grommet
A
(6) and seal
on the cable bush.
Connect the equipment to earth.
• Electrical connection with power cable
> 6 mm²:
– Enlarge the hole in the cable grommet
F
(6).
– power cable 16 mm² - from below:
Remove the webs and secure the mains
terminals with a screw
K1
.
3. Standard installation for contractors
Electrical: unfi nished walls – from below; water: unfi nished walls
3.9 Completing the installa-
tion
1. Open the three-way shut-off valve
G
(5).
2. Fit the back wall base
E
(3).
3.10 Initial start-up
(only by a qualified contractor)
1
Fill and vent the equipment.
Please note: risk of running dry!
Open and close all connected draw-off
valves several times, until the air has
been purged from the pipework and
the equipment, see “2.2 Important
information”.
2
Activate the safety pressure
limiter AP 3. The DHB-E electronic
is supplied with the safety pressure
limiter in tripped state (press the reset
button).
3
Push set value transducer cable
plug onto the PCB.
4
Fit the equipment cap and secure
with the screw.
5
Switch on the mains power.
6
Turn the temperature selector
clockwise and anti-clockwise, to
calibrate the set value transducer.
6
Check the instantaneous water
heater function.
8
Remove the protective fi lm from
the user interface.
Possible displays by the LED “traffi c
light” indicators (
A
10, see also “7. Trou-
bleshooting”):
red illuminates in case of faults
yellow illuminates when heater is on
green fl ashing: power on
Equipment handover
Explain the equipment function to the user
and familiarise the user with its operation.
2.
1.
e
le
c
t
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