STIEBEL ELTRON DHC 6 EC 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 6 EL / 6 EC / 8 EL / 8 EC / 10 EL

STIEBEL ELTRON
2
General information

General information
The chapter Operation is intended for
users and qualified installers.
The chapter Installation is intended for
qualified installers.
Read these instructions
carefully before using the
appliance and retain them for
future reference. If the appliance
is passed on to a third party please
hand these instructions to the new
user.
This appliance can be
used by children aged
from 8 years and above and
persons with reduced
physical, sensory or mental
capabilities or lack of
experience and knowledge if
they have been given
supervision or instruction
concerning use of the
appliance in a safe way and
understand the hazards
involved.
Children shall not play
with the appliance.
Cleaning and user
maintenance shall not be
made by children without
supervision.











 














STIEBEL ELTRON
3
Content

English
1. Installation Instruction ................................................................................................................................................ 4
1.1 Description of the unit (internal) ................................................................................................................... 6
1.2 Installing the unit ................................................................................................................................................ 7
2. Operation instruction ................................................................................................................................................... 11
2.1 Description of the unit ...................................................................................................................................... 11
2.2 Using the unit ....................................................................................................................................................... 11
2.3 Description of the unit (External) .................................................................................................................. 12
2.4 Earth Leakage Circuit Breaker (ELCB) .............................................................................................................. 13
2.5 First Operation ...................................................................................................................................................... 14
2.6 Adjusting Water Flow......................................................................................................................................... 14
2.7 Technical data ...................................................................................................................................................... 15
2.8 Regulations and Provisions ............................................................................................................................. 16
2.9 Important notes .................................................................................................................................................. 16
2.10 Installation location ........................................................................................................................................ 16
2.11 Care and maintenance ................................................................................................................................... 16
3. Guarantee ........................................................................................................................................................................... 17
4. Fault elimination for user ........................................................................................................................................... 17

 ............................................................................................................................................................................. 18
  
  
 ............................................................................................................................................................................... 25
  25
  25
  26
2.4  ......................................................................................................................................................................... 27
  
2.6  ..................................................................................................................................................... 28
  
  
  
  
  
 ............................................................................................................................................................................................ 31
 ................................................................................................................................................................................. 31

STIEBEL ELTRON
4
1. Installation Instruction for the qualied installer
Installation to a bath / sink.
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
Dimension Cable
Fig 1
Fig 2 Fig 3

STIEBEL ELTRON
5
min. 4.5 mm
max. 5.5 mm
mm6
4 x 35 mm
6 mm
4 x 35 mm
6 mm
17
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)
4 x 35 mm
4.3 mm
1. Installation Instruction for the qualied installer
Using the installation template to
drill the holes
Wall Mounting
Wiring diagram
Fig 4 Fig 5
Fig 6

STIEBEL ELTRON
6
1.1 Description of the unit (internal)
1. Installation Instruction for the qualied installer
1. Upper mounting hole
2. Terminal block
(Electronic Control)
3. Thermostat
4. Cable entry with seal
5. Copper tank
6. ELCB (option)
7. Reed switch
8. Flow Limiter
9. Lower mounting hole
10. Plug connecting the
circuit board to the
cover
11. Hot water connection
12. Cold water connection
16
14
15
13
1
3
5
7
9
11
2
4
6
8
10
12
13. Plug connecting the
temperature control
to the circuit board
14. ELCB Test (option)
15. ELCB Reset (option)
16. Circuit board cover
Description of the unit (Internal)
Fig 7

STIEBEL ELTRON
7
1.2 Installation the unit
Preparation before installation of the unit:
- Place a drilling guide at the drilling
position in order to drill a hole in the wall
(Fig 4).
- Insert a wall plug and screw in (the
depth of the protruding screw head
must be correct) (Fig 4 No.17).
- Remove the screw from underneath
the water heater.
- Open the cover of the unit.
- Before taking any action, always
switch off the water heater’s main circuit
breaker first.
- Inspect the internal components.
The cable must be in good condition, and
the ELCB must be turned to the“off”
position.
- Remove the plug connecting the
cover of the unit.
- Create an opening for the water inlet
in the case of wall-embedded and
wall-mounted a pipes.
1. Installation Instruction for the qualied installer
(concealed connection)
Fig 8
Fig 9
Fig 10
Fig 11

STIEBEL ELTRON
8
1. Installation Instruction for the qualied installer
- In the case of laying the cable from
above and from the side, create an open-
ing 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 rub-
ber seal at the rear of the unit. Please
ensure that the power is turned o at
the mains.
- Hang the heater on the screws mounted
on the wall, and slide the heater down
into position.
- A circuit breaker or power control
switch should be installed before the
unit. The size of the circuit breaker must
correspond to the voltage of the heater
(check the size of the circuit breaker in
the Technical Information section).
- 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 ensure that the correct
size of wire is used.
Fig 12 Fig 13
Fig 14 Fig 15

STIEBEL ELTRON
9
1. Installation Instruction for the qualied installer
A
min. 46
max. 50
mm
WW
C
B
KW
Connecting Water Pipes (concealed
connection)
Connecting the water heater to a wall-
embedded water pipe:
- Connect the nipple joints (Fig 16/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 diagram).
- Screw the joints on the unit (Fig 16/A)
to the joints (both hot and cold water),
using a rubber leakage gasket (Fig 16/C)
between the joints.
KW
B
A
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 17/A)
to the pipe (both hot and cold water),
using a rubber leakage gasket (Fig 17/B)
between the joints.
The company does not
accept liability for any failure
caused by improper installation and /
or unauthorized installers.
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.
Fig 16 Fig 17

STIEBEL ELTRON
10
1. 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.
Fig 18
Fig 19
Fig 20

STIEBEL ELTRON
11
2. Operation Instruction for the user and the qualied installer
2.1 Description of the unit.
The DHC_EC / EL fully electronic instan-
taneous water heater heat the water
while it is flowing through the unit. The
indicator light will show when the heater
is in operation, and the temperature
can be adjusted by turning the knob at
the front of the unit, which controls the
operation of the heater electronically.
This appliance is designed for domestic
use. It can be used safely by untrained
persons. The appliance can also be
used in a non-domestic environment,
e.g. in a small business,as long as it is
used in the same way.
Warning Injury
The appliance may be used by
children aged 8 and up and persons
with reduced physical, sensory or
mental capabilities or a lack of experi-
ence provided that they are super-
vised or they have been instructed on
how to use the appliance safely and
have under-stood the resulting risks.
Children must never play with the
appliance.
Children must never clean the appli-
ance or perform user maintenance
unless they are supervised.
2.2 Using the unit
1. Adjust the temperature using at
the selector.
Level •➝heats 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
flow is too high or cold water
temperatures are to low temperatures
may not be reached.
2. Turn the hot water valve on. The
lighting indicator will show at the
front of the unit (a)

STIEBEL ELTRON
12
2.3 Description of the unit (External)
a) Indicator Light
b) Temperature Control knob
c) ELCB Test knob
c
e
a
b
f
d
Description of the unit (External)
The DHC_EC / 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).
d) ELCB Reset knob
e) Cold Water Inlet Pipe
f) Hot Water Outlet Pipe
Warning :
For electrical heating appliances
equipped with a heat cutoff device
that does not reset automatically, if you
would like to reset the unit, the mains
power supply must be disconnected
first.
2. Operation Instruction for the user and the qualied installer
Fig 21

STIEBEL ELTRON
13
2. Operation Instruction for the user and the qualied installer
2.4 This model features an Earth
Leakage Circuit Breaker (ELCB)
(Type EC only), which should be
test a monthly.
How to use the ELCB:
Before operating the water heater. Turn
the ELCB Reset knob (d) at the side of the
heater to start operation.
How to test the ELCB:
Turn the ELCB Test knob (c) at the side of
the unit. ELCB Reset (d) will cease to func-
tion. Please note that the indicator light at
the front of the unit will turn off. Then, turn
the ELCB Reset knob (d) to start operate
again.
ELCB Knob Positioning
Warning !
If the unit does not operate, even
pressing the Reset knob, contact Stiebel
Eltron service for a check and repair.
2.4.1 This model features an automatic
cutoff device that functions when
the water temperature is
unusually high.
In the event that the thermostat
cut off from operating, please
refrain from taking any action. Please
contact the Stiebel Eltron Service Center
for further inspections and repairs to be
made.
Fig 22

STIEBEL ELTRON
14
2. Operation Instruction for the user and the qualied installer
2.5 First Operation
The water heater should first be oper-
ated by an expert technician only.
Before turning on the water
heater to start operation, turn
the ELCB Reset knob to the ”off” posi-
tion, and open all of water valves fully
at every point, so that water is able to
flow through the heater and expel air
from the pipe and the tank, until the
water flow is constant. Please ensure
that the water heater is functioning
correctly, and close the valve again.
- Turn the ELCB Reset knob to the “on”
position to start operating the water
heater.
- The indicator light will show.
- The DHC_EC / EL Water Heater fea-
tures a temperature control knob at the
front of the unit, whereby 3 tempera-
ture levels may be selected.
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 scald-
ing hazard.
The appliance is not to be installed
in locations where freezing can
occur.
If the supply cord is damaged,
it must be replaced by the
manufacturer, its service agent or
similarly qualified persons in order to
avoid a hazard.
2.6 Adjusting Water Flow
If the required temperature is not
reached, you may adjust the flow rate
by turning the combination valve or
water flow control device (Fig 7 No.8).
The hot water temperature
depends on the power of the
unit, the cold water temperature and
the flow volume.

STIEBEL ELTRON
15
2. Operation Instruction for the user and the qualied installer
2.7 Technical Data
Type DHC
6 EL
DHC
6 EC
DHC
8 EL
DHC
8 EC
DHC
10 EL
Nominal capacity l 0.45 0.50
Design Close outlet
Min. inlet water pressure MPa(bar) 0.02 (0.2)
Max. inlet water pressure MPa(bar) 1.0(10)
Water connection G ½“ (External Thread)
Dimension (W x H x D) mm 200 x 360 x 110
Weight kg 2.0
Electrical connection 1/N/PE/AC 220..240 V
Recommended circuit breaker A 32 40 50
Recommended cable size Sqmm 4-6 6-8 8-10
Rated power (kW) Rated current (A)
220 V
230 V
240 V
Kw - A
6.0 - 27.3
6.6 - 28.7
7.1 - 29.6
kW - A
8.0 - 36.4
8.7 - 37.8
9.5 - 39.6
kW - A
9.9
Safety device - ELCB - ELCB -
Note:
The cable sizes can only be a guiding value. Always abide by the corresponding
local standards, laws and regulations.
Stiebel Eltron cannot be held liable for any damages.

STIEBEL ELTRON
16
2. Operation Instruction for the user and the qualied installer
2.8 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.
- New hose-sets are to be used* and
old hose-sets should not be reused.
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.
Connection wires in correct
polarity (L,N).
●Connecting wires in wrong polarity
(L,N) causes an abnormal condition
which may lead to electric leaking,
burning, etc.
2.9 Important notes
- Make sure the data on the unit rating
plate is current
- Install the unit so that it is flush
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 : max 10 bar
The unit must be connected to
the protective earth conductor
(see electric circuit diagram).
2.10 Installation location
The instantaneous water heater
should be installed in an enclosed
frost-free area, if possible close to the
drawing-off 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 21)
2.11 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 sufficient to clean
the unit. Do not use any foaming or
abrasive cleaning agents!
Maintenance work may only be
carried out by a qualified installer.
When carrying out any work,
disconnect the unit from the
mains.
* (not included)

STIEBEL ELTRON
17
3. Guarantee
For guarantees please refer to the
respective terms and conditions of
supply for your country.
The installation, electrical
connection and first operation
of this appliance should be carried
out by a qualified installer.
The company does not
accept liability for any failure
caused by improper installation and /
or unauthorized installers.
Fault Cause Rectification
No hot water despite water flow
through the unit.
- The water flow volume
required for the unit
to turn it on has not
been reached.
- Increase flow volume
- Water flow too high Reduce water flow
- Water flow too high
- Heating setting too low
- Turn knob to the right
(max. position)
- ELCB activated. - Turn ELCB Reset
konb.
4. Fault elimination for the user

STIEBEL ELTRON
18

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


 
 

STIEBEL ELTRON
19
min. 4.5 mm
max. 5.5 mm
mm6
4 x 35 mm
6 mm
4 x 35 mm
6 mm
17
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)
4 x 35 mm
4.3 mm

 

 


STIEBEL ELTRON
20

 
 
3. 
4. 
 
 
 
16
14
15
13
1
3
5
7
9
11
2
4
6
8
10
12
 
 
 



12. 
 
 
 

 

 


