STIEBEL ELTRON DHC-E 8/10-2 CLASSIC Specification sheet

OPERATION AND INSTALLATION
OPERACIÓN E INSTALACIÓN
UTILISATION ET INSTALLATION
ELECTRONICALLY CONTROLLED ELECTRIC TANKLESS WATER HEATER
CALENTADOR INSTANTÁNEO CON CONTROLADO ELECTRÓNICA
CHAUFFE-EAU INSTANTANÉ À GESTION ÉLECTRONIQUE
» DHC-E 8/10-2 CLASSIC
» DHC-E 12-2 CLASSIC
Certified to ANSI/UL Std. 499
Conforms to CAN/CSA Std. C22.2 No. 64
Certificación con ANSI/UL Std. 499
Conforme a CAN/CSA Std. C22.2 No. 64
Certifié à la norme ANSI/UL Std. 499
Conforme à la norme CAN/CSA Std. C22.2 No. 64
Tested and certified by WQA to NSF/ANSI372
for lead free compliance.
Probado y certificado por WQA NSF/ANSI 372 para
el cumplimiento de las regulaciones sin plomo.
Testé et certifié par WQA à la NSF/ANSI 372 pour une
utilisation sans plomb.

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CONTENTS | OPERATION
OPERATION
1. General information _________________________________________2
1.1 Safety information����������������������������������������������� 2
1.2 Other symbols in this document������������������������������ 3
2. Safety__________________________________________________________3
2.1 Intended use������������������������������������������������������ 3
2.2 General Information��������������������������������������������� 3
2.3 Safety Precautions����������������������������������������������� 3
2.4 Test symbols ������������������������������������������������������ 3
3. Register your product _______________________________________4
4. General________________________________________________________4
5. Troubleshooting ______________________________________________4
INSTALLATION
6. Description____________________________________________________5
6.1 Application�������������������������������������������������������� 5
7. Mounting______________________________________________________5
8. Water connections ___________________________________________6
9. Electrical connection_________________________________________6
9.1 DHC-E 8/10 Classic switchable power output �������������� 6
9.2 Temperature setting/anti-scalding protection ������������� 7
9.3 Terminal block���������������������������������������������������� 7
10. Commissioning _______________________________________________7
10.1 Appliance handover ��������������������������������������������� 7
11. Troubleshooting ______________________________________________7
11.1 Diagnostic lights ������������������������������������������������� 7
11.2 Fault table��������������������������������������������������������� 7
11.3 Resetting the safety thermal cutout ������������������������� 8
12. Normal maintenance_________________________________________8
13. Technical Data ________________________________________________8
13.1 Dimensions diagram �������������������������������������������� 8
13.2 Wiring diagram �������������������������������������������������� 9
13.3 Maximum temperature increase above ambient water
temperature ����������������������������������������������������� 10
13.4 Data table �������������������������������������������������������� 11
14. Spare parts _________________________________________________ 12
15. Warranty ____________________________________________________ 13
OPERATION
1. General information
Note Read these instructions carefully before using the ap-
pliance and familiarize yourself with its functions. Keep
these instructions safe. Pass on the instructions to a new
user if required.
1.1 Safety information
1.1.1 Structure of safety information
KEYWORD: Type of risk Here, possible consequences are listed that may
result from not observing the safety information.
fSteps to prevent the risk are listed.
1.1.2 Symbols. type of risk
Symbol Type of risk
!Injury
Electrocution
Burns or scalding
1.1.3 Keywords
KEYWORD Description
DANGER If this information is not observed, it will result in serious
injury or death.
WARNING If this information is not observed, it can result in serious
injury or death.
CAUTION If this information is not observed, it can lead to medium
or minor injury.

OPERATION
SAFETY
ENGLISH
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1.2 Other symbols in this document
Note Notes are bordered by horizontal lines above and below
the text. General information is identified by the symbol
shown on the left.
fRead these notes carefully.
Symbol
!Damage to the appliance and environment
Appliance disposal
fThis symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
2. Safety
Observe the following safety information and regulations.
Operate the appliance only when fully installed and with all safety
equipment fitted.
2.1 Intended use
The appliance is intended for heating domestic hot water and can
supply several draw-off points.
Any other use beyond that described shall be deemed inappro-
priate.
Observation of these instructions is also part of the correct use
of this appliance.
2.2 General Information
Read this entire manual. Failure to follow all the guides, instruc-
tions and rules could cause personal injury or property damage.
Improper installation, adjustment, alteration, service and use of
this appliance can result in serious injury.
This appliance must be installed by a licensed electrician and
plumber. The installation must comply with all national, state and
local plumbing and electric codes. Proper installation is the re-
sponsibility of the installer. Failure to comply with the installation
and operating instructions or improper use voids the warranty.
Save these instructions for future reference. Installer should leave
these instructions with the consumer.
If you have any questions regarding the installation, use or opera-
tion of this water heater, or if you need any additional installation
manuals, please call our technical service line, see last side.
2.3 Safety Precautions
!DANGER: Injury
Please read and follow these instructions.
Failure to follow these instructions could result in seri-
ous personal injury or death.
!Damage to the appliance and the environment
The appliance must be installed by a licensed electri-
cian and plumber. The installation must comply with all
national, state and local plumbing and electric codes.
Service of the appliance must be performed by qualified
service TECHNICIANS.
DANGER: Electrocution Before proceeding with any installation, adjustment.
alteration, or service of this appliance all circuit break-
ers and disconnect switches servicing the appliance
must be turned off. Failure to do so could result in
serious personal injury or death.
DANGER: Electrocution Never remove the appliance‘s cover unless the electric-
ity servicing the appliance is turned off. Failure to do
so could result in personal injury or death.
DANGER: Electrocution The appliance must be properly grounded. Failure to
electrically ground the product could result in serious
personal injury or death.
DANGER: Burns Water temperatures over 125°F (52°C) can cause severe
burns instantly or death from scalding. A hot water
scalding potential exists if the thermostat on the ap-
pliance is set too high. Households with small children,
disabled or elderly persons may require that the ther-
mostat be set at 113°F (45°C) or lower to prevent pos-
sible injury from hot water.
!WARNING: Injury
Where children or persons with limited physical, sen-
sory or mental capabilities are to be allowed to control
this appliance, ensure that this will only happen under
supervision or after appropriate instructions by a per-
son responsible for their safety.
Children should be supervised to ensure that they never
play with the appliance.
2.4 Test symbols
See type plate on the appliance.

OPERATION
REGISTER YOUR PRODUCT
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3. Register your product
You must register this product within 90 days of purchase on our web site in order to activate the standard
warranty or to be eligible for the extended warranty. Go to
our web site at www.stiebel-eltron-usa.com and click on
“Register Your Product.”
Before beginning the registration process, we suggest that
you gather the necessary information which will be as
follows:
Type, Example: DHC-E Classic
Number listed after “Nr.”
Place of Purchase
Purchase Date
First & Last Name
Email address
Physical Address
Phone Number
Installation Date
If you have any questions concerning the registration process
or warranty options, please contact Stiebel Eltron USA di-
rectly at 800.582.8423.
4. General
The tankless water heater differs from conventional storage type
water heaters in several ways. It does not store hot water. Instead,
water is heated instantaneously as it flows through the appliance.
Due to the absence of stand-by losses, the appliance offers greater
energy efficiency than storage type water heaters.
D0000099697-a
The input of heat into the water is electronically controlled. The
appliance will deliver any water temperature between 86 °F (30 °C)
and 140°F (60°C). Please set the desired temperature using the
knob on the front cover.
Note: For reasons of appliance efficiency and durability (scal-
ing), the optimum temperature setting lies between 86 °F
(30°C) and 120°F (50°C).
In case the “Power” light is flashing while the appliance operates,
the water flow rate exceeds the heating capacity of the appli-
ance. Reduce the hot water flow rate in order to let the appliance
achieve the set point temperature. The maximum temperature is
electronically limited to 140 °F (60 °C). In case you have questions
regarding the way you plan to use the appliance, please call our
technical service line, see last side.
5. Troubleshooting
Symptom Possible Cause fSolution
No hot water not enough flow rate to
activate appliance
clean faucet aerator or shower
head
Water not hot enough water flow too high reduce water flow rate until
light on front cover stops
blinking
If you cannot remedy the fault, notify the contractor who installed
the appliance. To facilitate and speed up your enquiry, please pro-
vide the serial number from the type plate (000000-0000-000000).

ENGLISH
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INSTALLATION
DESCRIPTION
INSTALLATION
6. Description
6.1 Application
One appliance can be used for the following applications:
One or multiple hand washing sinks
One kitchen sink
Cabins with flow restriction at shower head.
A combination of two appliances can be used for whole apartment
and house applications. Please contact STIEBEL ELTRON for special
installation instructions.
All areas with a ground water temperature likely to exceed 65°F
(18°C) year round:
Whole apartment or house
CAUTION: Electrocution Unit must be installed in a vertical position with the
water fittings pointing downward. In this position the
unit is splashproof, so that no water can soak in.
1 2
3
4
5
6
7
26�02�02�1082
12
3
4
5
6
7
26�02�02�1081
1 Hot valve (left)
2 Cold valve (right)
3 Sink
4 ½˝ main pipe
5 Water supply line for faucet installation
6 Shut-off valve
7 Electrical junction box
7. Mounting
fInstall appliance as close as possible to the main hot water
draw-off points.
fInstall appliance in a frost free area. If frost may occur, re-
move appliance before freezing temperatures set in.
fLeave a minimum of 5˝ (125 mm) of clearance on all sides for
servicing.
26�02�02�1083
fRemove plastic cover.
26�02�02�033126�02�02�1090
fScrew the screws into the wall and hang the appliance.
Screws and plastic wall anchors for mounting on masonry or
wood are provided.
fSecure the screws.

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INSTALLATION
WATER CONNECTIONS
8. Water connections
!Damage to the appliance and the environment:
Excessive heat from soldering on copper pipes near the
DHC-E Classic may cause damage.
fAll plumbing work must comply with national and applicable
state and local plumbing codes.
fA pressure reducing valve must be installed if the cold water
supply pressure exceeds 150 psi (10 bar).
fMake certain that the cold water supply line has been flushed
to remove any scale and dirt.
fInstall an isolating valve in the cold water line as shown in
the diagram in section 6.1 “Mounting the appliance”, pg.
5. This allows the appliance to be isolated for maintenance
purposes.
fCold water connection (inlet) is on the right side of the ap-
pliance, hot water connection (outlet) is on the left side of
appliance.
fTankless water heaters such as the DHC-E are not required to
be equipped with a Temperature and Pressure Relief Valve
(T&P). If the local inspector will not pass the installation
without a T&P, it should be installed on the hot water outlet
side of appliance.
fThe DHC-E’s hot water outlet is designed for connection to
copper tubing, PEX tubing or a braided stainless steel hose
with a ½˝ NPT female tapered thread.
fThe plumbing on the cold water inlet side needs to be such
that it can easily be removed to allow access to the inlet filter
screen. The easiest way to achieve this is to use a stainless
steel braided hose connector. If soldering near the unit is
necessary, please direct the flame away from the housing of
the unit in order to avoid damage.
fWhen all plumbing work is completed, check for leaks and
take corrective action before proceeding.
9. Electrical connection
DANGER: Electrocution Carry out all electrical connection and installation work
in accordance with relevant regulations.
DANGER: Electrocution Only use a permanent connection to the power supply.
The appliance must be able to be separated from the
power supply by an isolator that disconnects all poles
with at least 1/8˝(3mm) contact separation.
DANGER: Electrocution Before beginning any work on the electric installa-
tion, be sure that main breaker panel switch is “off”
to avoid any danger of electric shock. All mounting and
plumbing must be completed before proceeding with
electrical hook-up. Where required by local, state or
national electrical codes the circuit should be equipped
with a “ground fault interrupter”.
DANGER: Electrocution As with any electric appliance. failure to electrically
ground appliance may result in serious injury or death.
!Damage to the appliance and the environment:
Observe the type plate. The specified voltage must match
the mains voltage.
fThe appliance should be connected to a properly grounded
dedicated branch circuit of proper voltage rating. In installa-
tions with several appliances, each appliance requires an
independent circuit. Please refer to the technical data table
for the correct wire and circuit breaker size.
4˝ (100 mm)
26�02�02�1084
fThe wire must be fed through the rubber seal located be-
tween the hot and cold water connections. Then feed wires
through strain relief clamp and tighten clamp down on wire.
The “live” wires must be connected to the slots on the ter-
minal block marked L and L (L and N). The ground wire must
be connected to slot marked with the ground symbol. Strain
relief clamp with screws and rubber seal are provided.
9.1 DHC-E 8/10-2 Classic switchable power output
For the DHC-E 8/10-2 Classic model, the power output is adjustable
in 2 stages. The factory default setting is Stage 1 (7.2 kW@240 V).
1
26�02�02�1088
1 coding plug
If the heater needs to be installed with a different power output,
take the following steps:
fInsert the coding plug to select the desired power output.
Stage 1 208 V 220 V 230 V 240 V
5.4 kW 6.0 kW 6.6 kW 7.2 kW
Stage 2 208 V 220 V 230 V 240 V
7.2 kW 8.1 kW 8.8 kW 9.6 kW
fMark the selected power output and voltage on the type plate
with a permanent marker.

ENGLISH
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INSTALLATION
COMMISSIONING
9.2 Temperature setting/anti-scalding protection
26�02�02�1089
fConnect the lead of the electronic temperature control to po-
sition “A1” in order to get the maximum outlet temperature
of 140 °F (60 °C).
The maximum temperature can be limited to 109°F (43°C):
fConnect the lead of the electronic temperature control to po-
sition “A2”.
fReinstall the plastic cover.
9.3 Terminal block
Consult the chart below for the recommended torque amounts on
the terminal block screws.
Screw Size (mm) Min. Torque (N•cm) Min. Torque (lbf•in)
M6 200–250 17.7–22.1
Using the proper torque specifications to secure wire to the wiring
block helps to avoid personal loss or property damage.
10. Commissioning
DANGER: Electrocution Commissioning must only be carried out by an autho-
rized contractor in accordance with safety regulations.
!Damage to the appliance and the environment:
Open hot water faucet for a few minutes until water flow
is continuous and all air is purged from water pipes. The
appliance’s plastic cover must be installed before the cir-
cuit breaker is turned on.
fTurn on circuit breaker to bring electrical power to the
appliance.
fTurn the temperature selector clockwise and anti-clockwise,
to calibrate the temperature selector.
fAdjust the water temperature to the desired level using the
knob on the front cover of the appliance.
fTurn on hot water and wait twenty seconds until temperature
has stabilized.
fCheck the water temperature with your hand and make sure
that it does not feel too hot. Reduce temperature if this is
necessary. A setting of 108–116°F (42–47 °C) is recommended
for most applications.
fExplain to the user how the appliance works and familiarise
him or her with its use.
fAdvise the user about possible hazards (hot water tempera-
ture up to 140°F (60°C). Hand over these instructions, to be
kept for future reference.
fA setting of 108–116°F (42–47°C) is recommended for most
applications.
10.1 Appliance handover
Explain the functions of the appliance to the user. Draw special
attention to the safety information. Hand the operating and instal-
lation instructions to the user.
11. Troubleshooting
DANGER: Electrocution To test the appliance, it must be supplied with power.
11.1 Diagnostic lights
Display options
red illuminates in case of faults
yellow illuminates when the appliance is heating water
green flashing: The appliance is supplied with power
1
26�02�02�1088
1 LED diagnostic “traffic lights”
11.2 Fault table
Symptom Possible Cause fSolution
No hot water circuit breaker off
safety thermal cut-out
tripped
turn circuit breaker on
reset thermal cut-out
not enough flow rate to
activate appliance
clean filter screen at appli-
ance
clean faucet aerator or
shower head
Not enough hot water filter screen clogged clean filter screen at appli-
ance
Water not hot enough water flow too high reduce water flow rate until
light on front cover stops
blinking
supply correct voltage to ap-
pliance

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INSTALLATION
NORMAL MAINTENANCE
fIf you are not able to resolve a problem please contact us,
(see rear cover), before removing the appliance from the
wall. STIEBEL ELTRON is happy to provide technical assis-
tance. In most instances, we can resolve the problem over
the phone.
11.3 Resetting the safety thermal cutout
DANGER: Electrocution
Do not attempt to reset the safety thermal cutout of
this water heater unless power to the unit has been
completely shut off at the circuit breakers.
26�02�02�1089
The safety thermal cutout on the DHC-E Classic is designed to cut
off electrical power to the heating elements if water of too high a
temperature is encountered. When the safety cutout has tripped,
it must be reset manually.
To reset the safety cutout, use the following procedure:
fTurn off the circuit breaker attached to the water heater
fRemove the front cover of the water heater
fIdentify the safety thermal cutout on the top of the copper
heating canister. The button at the top is the reset button.
fPress down on the button, take note of whether it clicks or
not when pressed.
12. Normal maintenance
STIEBEL ELTRON tankless water heaters are designed for a very
long service life. Actual life expectancy will vary with water qual-
ity and use. The appliance itself does not require any regular
maintenance.
However, to ensure consistent water flow, it is recommended to
periodically remove scale and dirt that may build up at the aera-
tor of the faucet(s), the filter screen in the appliance, or in the
shower head.
13. Technical Data
13.1 Dimensions diagram
b01
c06 c01
c01
c06
4˝(10 cm) 4¼˝(11 cm)
1½˝(3.8 cm)
7¾˝(20 cm)
¼˝(.8 cm) 14¼˝(36 cm)
3˝(7.5 cm) 10¾˝(27.3 cm)
D0000017762
b01 Electrical cable entry
c01 cold water inlet ½˝ NPT
c06 hot water outlet ½˝ NPT
Safety
thermal
cutout

ENGLISH
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INSTALLATION
TECHNICAL DATA
13.2 Wiring diagram
DHC-E 8/10-2 Classic
2/GND ~ 208 / 240 V
1/N/GND ~ 220 / 230 / 240 V
85�02�03�0001
DHC-E 12-2 Classic
2/GND ~ 208 / 240 V
1/N/GND ~ 220 / 230 / 240 V
85�02�03�0002

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INSTALLATION
TECHNICAL DATA
13.3 Maximum temperature increase above ambient water temperature
Hot water flow rate [ gpm ]
Hot water outlet temperature 104 °F
Cold water inlet temperature °F 39 50 59 68 77 86 95 104 113 122 131
DHC-E 8/10-2 Classic 5.4 kW @ 208 V 0.57 0.68 0.82 1.02 1.36 2.04 4.09 - - - -
7.2 kW @ 240 V 0.76 0.91 1.09 1.36 1.82 2.72 5.45 - - - -
7.2 kW @ 208 V 0.76 0.91 1.09 1.36 1.82 2.72 5.45 - - - -
9.6 kW @ 240 V 1.01 1.21 1.45 1.82 2.42 3.63 6.61 - - - -
DHC-E 12-2 Classic 9 kW @ 208 V 0.95 1.14 1.36 1.70 2.27 3.23 6.47 - - - -
12 kW @ 240 V 1.26 1.51 1.82 2.27 3.03 4.31 6.61 - - - -
Hot water outlet temperature 113°F
Cold water inlet temperature °F 39 50 59 68 77 86 95 104 113 122 131
DHC-E 8/10-2 Classic 5.4 kW @ 208 V 0.50 0.58 0.68 0.82 1.02 1.36 2.04 4.09 - - -
7.2 kW @ 240 V 0.66 0.78 0.91 1.09 1.36 1.82 2.72 5.45 - - -
7.2 kW @ 208 V 0.66 0.78 0.91 1.09 1.36 1.82 2.72 5.45 - - -
9.6 kW @ 240 V 0.89 1.04 1.21 1.45 1.82 2.42 3.63 6.61 - - -
DHC-E 12-2 Classic 9 kW @ 208 V 0.83 0.97 1.14 1.36 1.70 2.16 3.23 6.47 - - -
12 kW @ 240 V 1.11 1.30 1.51 1.82 2.27 2.88 4.31 6.61 - - -
Hot water outlet temperature 140 °F
Cold water inlet temperature °F 39 50 59 68 77 86 95 104 113 122 131
DHC-E 8/10-2 Classic 5.4 kW @ 208 V 0.36 0.41 0.45 0.51 0.58 0.68 0.82 1.02 1.36 2.04 4.09
7.2 kW @ 240 V 0.49 0.54 0.61 0.68 0.78 0.91 1.09 1.36 1.82 2.72 5.45
7.2 kW @ 208 V 0.49 0.54 0.61 0.68 0.78 0.91 1.09 1.36 1.82 2.72 5.45
9.6 kW @ 240 V 0.65 0.73 0.81 0.91 1.04 1.21 1.45 1.82 2.42 3.63 6.61
DHC-E 12-2 Classic 9 kW @ 208 V 0.61 0.68 0.76 0.85 0.97 1.08 1.29 1.62 2.16 3.23 6.47
12 kW @ 240 V 0.81 0.91 1.01 1.14 1.30 1.44 1.73 2.16 2.88 4.31 6.61
Hot water flow rate [ l/min ]
Hot water outlet temperature 40 °C
Cold water inlet temperature °C 4 10 15 20 25 30 35 40 45 50 55
DHC-E 8/10-2 Classic 5.4 kW @ 208 V 2.15 2.58 3.09 3.87 5.16 7.73 15.47 - - - -
7.2 kW @ 240 V 2.86 3.44 4.12 5.16 6.87 10.31 20.62 - - - -
7.2 kW @ 208 V 2.86 3.44 4.12 5.16 6.87 10.31 20.62 - - - -
9.6 kW @ 240 V 3.82 4.58 5.50 6.87 9.16 13.75 25.00 - - - -
DHC-E 12-2 Classic 9 kW @ 208 V 3.58 4.30 5.16 6.44 8.59 12.24 24.49 - - - -
12 kW @ 240 V 4.77 5.73 6.87 8.59 11.46 16.32 25.00 - - - -
Hot water outlet temperature 45°C
Cold water inlet temperature °C 4 10 15 20 25 30 35 40 45 50 55
DHC-E 8/10-2 Classic 5.4 kW @ 208 V 1.89 2.21 2.58 3.09 3.87 5.16 7.73 15.47 - - -
7.2 kW @ 240 V 2.51 2.95 3.44 4.12 5.16 6.87 10.31 20.62 - - -
7.2 kW @ 208 V 2.51 2.95 3.44 4.12 5.16 6.87 10.31 20.62 - - -
9.6 kW @ 240 V 3.35 3.93 4.58 5.50 6.87 9.16 13.75 25.00 - - -
DHC-E 12-2 Classic 9 kW @ 208 V 3.14 3.68 4.30 5.16 6.44 8.16 12.24 24.49 - - -
12 kW @ 240 V 4.19 4.91 5.73 6.87 8.59 10.88 16.32 25.00 - - -
Hot water outlet temperature 60 °C
Cold water inlet temperature °C 4 10 15 20 25 30 35 40 45 50 55
DHC-E 8/10-2 Classic 5.4 kW @ 208 V 1.38 1.55 1.72 1.93 2.21 2.58 3.09 3.87 5.16 7.73 15.47
7.2 kW @ 240 V 1.84 2.06 2.29 2.58 2.95 3.44 4.12 5.16 6.87 10.31 20.62
7.2 kW @ 208 V 1.84 2.06 2.29 2.58 2.95 3.44 4.12 5.16 6.87 10.31 20.62
9.6 kW @ 240 V 2.45 2.75 3.05 3.44 3.93 4.58 5.50 6.87 9.16 13.75 25.00
DHC-E 12-2 Classic 9 kW @ 208 V 2.30 2.58 2.86 3.22 3.68 4.08 4.90 6.12 8.16 12.24 24.49
12 kW @ 240 V 3.07 3.44 3.82 4.30 4.91 5.44 6.53 8.16 10.88 16.32 25.00