STIEBEL ELTRON DHC 8 EL User manual

This water heater must be installed (water and electrical installation),
commissioned and serviced by approved service technicians in
accordance with these instructions.
English
Instantaneous water heater - Operation and installation instructions
DHC 8 EL

STIEBEL ELTRON
2

STIEBEL ELTRON 3
General information
The chapter Operation is intended
for users and qualied installers.
The chapter Installation is intended
for qualied installers.
Read these instruction
carefully before using the
appliance and retain them for
future reference. If the appliance
is passed on the third party please
hand these instructions to the new
user.
- This appliance is not
intended for use by
persons (including children) with
reduced physical, sensory or men-
tal capabilities, or lack of experi-
ence and knowledge, unless they
have been given supervision or
instruction concerning use of the
appliance by a person responsible
for their safety.
- Children should be
supervised to ensure that
they do not play with the appliance.
Warning:
For continued safety of this
appliance it must be installed,
operated and maintained in
accordance with the
manufacturer’s instructions.

Description of the unit (External)
Operation Instruction for the user and the qualied installer
1. Operation and installation
instruction
1.1Description of the unit.
The DHC 8 EL fully electronic instanta -
neous water heater heat the water while it
is owing through the unit. The indicator
light will show when the heater is in opera-
tion, and the temperature can be adjusted
by turning the knob at the front of the unit,
which controls the operation of the heater
electronically.
1.2 Using the unit
1. Adjust the temperature using at
the selector.
Levelheats the water to a
temperature of~ 40 C
Level heats the water to a
medium temperature
of ~ 50 C
Level heats the water to a
maximum temperature
of ~ 60 C
Note : Incase incoming water ow is
too high or cold water
temperatures are too low
temperatures may not be reached.
2. Turn the hot water on. The indicator
light will show at the front of the unit (a).
Fig 1
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1.3 Description of the unit (External)
a. Indicator Light d. Cold Water Inlet Pipe
b. Temperature Control knob
c. Hot Water Outlet Pipe

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Operation Instruction for the user and the qualied installer
The DHC 8 EL water heater unit is
to be installed in a closed, frost-free
room (disconnected units are to be stored in
a frost-free location, since there will always
be some water left in the unit) The water
heater is to be installed vertically on a wall
(water connection downwards).
Warning :
For electrical heating appliances
equipped with a heat cuto device that
does not reset automatically, if you would
like to reset the unit, the mains power
supply must be disconnected rst.
In the event that the thermostat
cut o from operating, please
refrain from taking any action. Please contact
the Stiebel Eltron Service Centre for further
inspections and repairs to be made.
1.4 This model features an automatic
cuto device that functions when the
water temperature is unusally high.
Call 0114936910 (South Africa).

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Operation Instruction for the user and the qualied installer
2. First Operation
The water heater should rst be operated
by an expert technician only.
Before turning on the water
heater to start operation,
open all of water valves fully at
every point, so that water is able to ow
through the heater and expel air from the
pipe and the tank, until the water ow is
constant. Please ensure that the water
heater is functioning correctly, and close
the valve again.
WARNING:
When selecting an appropriate
water temperature, the temperature may
be dangerously high, especially for children.
Keep away from the hot water outlet, as it
may cause a potential scalding hazard.
- The indicator light will show.
- The DHC 8 EL Water Heater features
a temperature control knob at the front
of the unit, whereby 3 temperature levels
may be selected.
2.1 Adjusting Water Flow
If the required temperature is not
reached, you may adjust the ow rate by
turning the combination valve or water
ow control device (Fig 3, No.15).
The hot water temperature
depends on the power of the
unit, the cold water temperature and the
ow volume.

STIEBEL ELTRON 7
Operation Instruction for the user and the qualied installer
3. Technical Data
Type DHC 8 EL
Norminal capacity l. 0.45
Design Close outlet
Max. water pressure 1000 kPa
Min. water pressure to activate unit 200 kPa
Water connection G ½“ (External Thread) (15mm)
Dimension (W x H x D) mm. 360 x 200 x 110
Weight kg. 2.0
Electrical connection 1/N/PE/AC 220..240 V.
Rated power (kW) Rated current (A.) kW - A
220 V 8.0 - 36.4
230 V 8.7 - 37.8
240 V 9.5 - 39.6
Safety device -
4. Regulations and Provisions
- Regulations of the local power
supply company should be
observed.
- Regulations of the water supply
company should be observed
- Read & study the technical data.
- Install the unit vertically on the
wall.
- Electrical connection to be
secured.
The device must be capable of
being isolated from the mains,
for example by fuses, with an isolating
distance of at least 3.5 mm. in all poles.
5. Important notes
- Make sure the data on the unit rating
plate is current
- Install the unit so that it is ush with
the wall
- Material for the water installation:
Steel, copper, or plastic piping
systems. If plastic piping systems are
being used, the following instructions
are to be respected.
- Temperature : max 60 ˚C
- Pressure : 1000 kPa
The unit must be connected to
the protective earth conductor
(see electric circuit diagram).
Installation must comply with
AS/NZS 3500.4

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Operation Instruction for the user and the qualied installer
Guarantee
6. Installation location
The instantaneous water heater
should be installed in an enclosed
frost-free area, if possible close to the
drawing-o point (when dismantled, the
unit is to be stored in a place not subject to
frost, because there will always be some
residual water left inside). The unit is to be
installed vertically, as in Example (Fig 1)
7. Care and maintenance
All the information in these
instructions for operation and
installation must be followed carefully.
They provide important information
regarding safety, operation, and
maintenance of the unit.
A damp cloth is sucient to clean the
unit. Do not use any foaming or abrasive
cleaning agents!
Maintenance work may only be
carried out by a qualied installer.
When carrying out any work,
disconnect the unit from the
mains.
8. Guarantee
For guarantees please refer to the respec-
tive terms and conditions of supply for
your country.
The installation, electrical
connection and rst operation
of this appliance should be carried
out by a qualied installer.
The company does not accept
liability for any failure caused
by inproper installation and / or
unauthorized installers.

9. Fault elimination for the user
STIEBEL ELTRON 9
Fault elimination for the user
Fault Cause Rectication
No hot water despite water ow
through the unit.
- The water ow volume
required for the unit
to turn it on has not
been reached.
- Increase ow volume
- Water ow too high - Reduce water ow
- Heating setting too low-Turn knob to the right
(max. position)

STIEBEL ELTRON
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Installation Instruction for the qualied installer
Description of the unit (Internal)
Fig 3
Description of the unit
(internal)
1. Upper mounting hole
2. Lower mounting hole
3.
Depth for mounting screw
(Fig 7#3)
4. Distance of the connection
cable (Fig 6#4)
5. Thermostat
6. Cable entry with seal
7. Electrical connection
8. Plug connecting the circuit
board to the cover
9. Reed switch
10. Cold water connection
11. Hot water connection
12. Flow limiter
13. Circuit board cover
14. Cover
1
6
13
5
210
11
7
8
9
12
14

Fig 4
Installation to a shower / sink.
Fig 5 Fig 6
Dimension Cable
4
100 mm
200 mm
35 mm
G1/2
G1/2
110 mm.
59 mm. 280 mm.
360 mm. 270 mm. 264 mm.
9 mm.
50 mm.
65 mm
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Installation Instruction for the qualied installer

Fig 7 Fig 8
Using the installation template to drill the holes Wiring diagram
Wall Mounting
A - Heating Element
B - Electronic control set
C - Control Triac set
D - Thermal cut-out
E - Temperature Sensor (Inlet)
F - Temperature Sensor (Outlet)
G - ELCB (option)
Fig 9
min. 4.5 mm
max. 5.5 mm
m
m
6
4 x 35 mm
6 mm
4 x 35 mm
6 mm
3
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Installation Instruction for the qualied installer
4 x 35 mm
4,3 mm

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Installation Instruction for the qualied installer
Installation
Preparation before installation of the unit:
- Before taking any action, always
switch o the water heater’s main circuit
breaker rst.
- Place a drilling guide at the drilling
position in order to drill a hole in the wall
(Fig 7).
- Insert a wall plug and screw in (the
depth of the protruding screw head must
be correct) (Fig 7#3).
- Remove the screw from underneath
the water heater to open the cover of the
unit.
- Open the cover of the unit.
- Remove the plug connecting the
cover of the unit.
- Inspect the internal components.
The cable must be in good condition.
- Create an opening for the water
inlet in the case of wall-embeded and
wall-mounted pipes.
Fig 10 Fig 12
Fig 11 Fig 13
(concealed connection)

Fig 14
STIEBEL ELTRON
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Installation Instruction for the qualied installer
- In the case of laying the cable from
above and from the side, create an opening
for the electric cable using a pair of pliers to
pinch or break the plastic chip on the side or
on the top of the heater as appropriate, so
that the cable is tightly secured to the unit.
- Insert the cable through the rubber
seal at the rear of the unit. Please ensure
that the power is turned o at the mains.
- A circuit breaker or power control
switch should be installed before the unit.
The size of the circuit breaker must corre-
spond to the voltage of the heater (check
the size of the circuit breaker in the
Technical Information section).
- Hang the heater on the screws
mounted on the wall, and slide the heater
down into position.
- Measure and cut the insulation at the
end of the wire in preparation.
- Insert the wires into the respective
openings according to the diagram, and fasten
the screws to secure the wires tightly. Please en-
sure that the correct size of wire is used.
Fig 16
Fig 15 Fig 17

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Installation Instruction for the qualied installer
Connecting Water Pipes (concealed connection)
Connecting the water heater to a wall-em-
bedded water pipe:
- Connect the nipple joints (Fig 18/B)
to the cold water inlet pipe and the hot water
outlet pipe embedded in the wall at an
appropriate position and depth (please pay
attention to the distances shown in the dia-
gram).
- Screw the joints on the unit (Fig 18/A)
to the joints (both hot and cold water), using a
rubber leakage gasket (Fig 18/C) between
the joints.
Installing Water Heater wall-mounted
Connecting the water heater to a wall-mounted
water pipe:
- Connect the prepared water pipe to the
pre-assembled nipple joint.
- Screw the joints on the unit (Fig 19/A)
to the pipe (both hot and cold water), using a
rubber leakage gasket (Fig 16/B) between
the joints.
The cold water pipe must be turned
on in order to rinse it before
installation. Pressure-resistant equipment
must be used in compliance with accepted
standards.
A
min. 46
max. 50
mm
HW
C
B
CW
Fig 18
CW
B
A
Fig 19

Fig 20
F
Fig 22
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Installation Instruction for the qualied installer
- Install the cover. Connect the power
cord between the circuit board and the cover.
- After installation is complete, close
the casing and screw in tightly.
ig 21Fig 21

STIEBEL ELTRON 17

STIEBEL ELTRON
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STIEBEL ELTRON 19

Part no. 7901-293468
Part name : OPERATING INSTRUCTION DHC 8 EL En
Product code : DHC 8 EL : 233948