STIEBEL ELTRON DHC-E12 User Manual [en, es, fr]
OPERATION AND INSTALLATION
OPERACIÓN E INSTALACIÓN
UTILISATION ET INSTALLATION
ELECTRONICALLY CONTROLLED INSTANTANEOUS WATER HEATER | CALENTADOR INSTANTÁNEO
CON CONTROLADO ELECTRÓNICA | CHAUFFE-EAU INSTANTANÉ À GESTION ÉLECTRONIQUE
»DHC-E 8/10
»DHC-E 12
The DHC-E series is
tested and certifi ed
by WQA against NSF/
ANSI 372 for lead free
compliance.
STIEBEL ELTRON, Inc.
17 West Street | West Hatfi eld, MA 01088
Tel. 413-247-3380 | Fax 413-247-3369
Email info@stiebel-eltron-usa.com
www.stiebel-eltron-usa.com
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. General ________________________________________________________4
4. Troubleshooting ______________________________________________4
OPERATION
1. General information
Note
Read these instructions carefully before using the appliance and familiarize yourself with its functions. Keep
these instructions safe. Pass on the instructions to a new
user if required.
INSTALLATION
5. Mounting the appliance _____________________________________5
5.1 Application ________________________________________________________ 5
5.2 Mounting __________________________________________________________ 5
5.3 Water connections _______________________________________________ 5
6. Electrical connection _________________________________________6
6.1 DHC-E 8/10 - Appliance with output power options ______ 6
6.2 Temperature setting/anti-scalding protection ____________ 7
7. Commissioning _______________________________________________7
7.1 Appliance handover _____________________________________________ 7
8. Troubleshooting ______________________________________________7
8.1 Display options LED diagnostic „traffi c lights“ _____________ 7
8.2 Fault table _________________________________________________________ 7
9. Normal maintenance _________________________________________7
10. Technical Data ________________________________________________8
10.1 Dimensioned drawing __________________________________________ 8
10.2 Wiring diagram __________________________________________________ 8
10.3 Maximum temperature increase above ambient water
temperature ______________________________________________________ 9
10.4 Data table ________________________________________________________ 10
11. Spare parts _________________________________________________ 10
WARRANTY | ENVIRONMENT AND RECYCLING
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.
Steps 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.
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OPERATION
SAFETY
1.2 Other symbols in this document
Note
Notes are bordered by horizontal lines above and below
the text. General information is identifi ed by the symbol
shown on the left.
Read these notes carefully.
Symbol
Damage to the appliance and environment
!
Appliance disposal
This 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 fi tted.
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 inappropriate.
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, instructions and rules could cause personal injury or property damage.
Improper installation, adjustment, alteration, service and use of
this appliance can result in serious injury.
Damage to the appliance and the environment
!
The appliance must be installed by a licensed electrician
and plumber. The installation must comply with all national, state and local plumbing and electric codes.
Service of the appliance must be performed by qualifi ed
service TECHNICIANS.
DANGER Electrocution
Before proceeding with any installation, adjustment. alteration, or service of this appliance all circuit breakers
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 electricity
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 appliance
is set too high. Households with small children, disabled
or elderly persons may require that the thermostat be
set at 113°F (45 °C) or lower to prevent possible injury
from hot water.
WARNING Injury
!
Where children or persons with limited physical, sensory
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 person
responsible for their safety.
Children should be supervised to ensure that they never
play with the appliance.
2.4 Test symbols
ENGLISH
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 responsibility 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 operation of this water heater, or if you need any additional installation
manuals, please call our technical service line, see last side.
See type plate on the appliance.
2.3 Safety Precautions
DANGER Injury
!
Please read and follow these instructions.
Failure to follow these instructions could result in serioius personal injury or death.
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OPERATION
GENERAL
3. 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 fl ows through the appliance.
Due to the absence of stand-by losses, the appliance offers greater
energy effi ciency than storage type water heaters.
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 effi ciency and durability (scaling), the optimum temperature setting lies between 86°F
(30°C) and 120°F (50°C).
In case the “Power” light is fl ashing while the appliance operates,
the water fl ow rate exceeds the heating capacity of the appliance. Reduce the hot water fl ow 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.
4. Troubleshooting
Symptom Possible Cause Solution
No hot water not enough flow rate to
activate appliance
Water not hot enough water flow too high reduce water flow rate until
clean faucet aerator or shower
head
light on front cover stops
blinking
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If you cannot remedy the fault, notify the contractor who installed
the appliance. To facilitate and speed up your enquir y, please provide the serial number from the type plate (000000-0000-000000).
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INSTALLATION
MOUNTING THE APPLIANCE
INSTALLATION
5. Mounting the appliance
5.1 Application
ENGLISH
One appliance can be used for the following applications:
one or multiple hand washing sinks
one kitchen sink
cabins with fl ow restriction at shower head.
A combination of two appliance 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 fi ttings pointing downward. In this position the
unit is splashproof, so that no water can soak in.
12
3
7
4
5
6
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Remove plastic cover.
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1
7
1 Hot valve (left)
2 Cold valve (right)
3 Sink
4 1/2“ main pipe
5 Water supply line for faucet installation
6 Shut-off valve
7 Electrical junction box
2
3
4
5
6
5.2 Mounting
Install appliance as close as possible to the main hot water
draw-off points.
Install appliance in a frost free area. If frost may occur, re-
move appliance before freezing temperatures set in.
Leave a minimum of 5“ of clearance on all sides for servicing.
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Screw the screws into the wall and hang the appliance.
Screws and plastic wall anchors for mounting on masonry or
wood are provided.
Secure the screws.
5.3 Water connections
Damage to the appliance and the environment
!
Excessive heat from soldering on copper pipes near the
DHC may cause damage.
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INSTALLATION
ELECTRICAL CONNECTION
All plumbing work must comply with national and applicable
state and local plumbing codes.
Notice for Australia / New Zealand:
The installation shall comply with AS/NZS 3500.4.
A pressure reducing valve must be installed if the cold water
supply pressure exceeds 150 PSI (10 bar).
Make certain that the cold water supply line has been fl ushed
to remove any scale and dirt.
Install isolating valve in cold water line as shown in illustra-
tion “Mounting the appliance”. This allows the appliance to
be isolated for maintenance purposes.
Cold water connection (inlet) is on the right side of the ap-
pliance, hot water connection (outlet) is on the left side of
appliance.
Tankless water heaters such as the DHC-E are not required to
be equipped with a Pressure and Temperature Relief Valve
(P&T). If the local inspector will not pass the installation
without a P&T, it should be installed on the hot water outlet
side of appliance.
The appliance is designed for connection to copper tubing,
PEX tubing or a braided stainless steel hose with a ½“ NPT
female tapered thread. If soldering near the appliance is necessary, please direct the fl ame away from the plastic housing
of the appliance in order to avoid damage.
When all plumbing work is completed, check for leaks and
take corrective action before proceeding.
The appliance should be connected to a properly grounded
dedicated branch circuit of proper voltage rating. In installations with several appliances, each appliance requires an
independent circuit. Please refer to the technical data table
for the correct wire and circuit breaker size.
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The 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 terminal 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.
6.1 DHC-E 8/10 - Appliance with output power options
For the DHC-E 8/10 instantaneous water heater, the output power
is adjustable in 2 stages. In its delivered condition the appliance
is set to 7.2 kW@240 V.
6. 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 3mm contact separation.
Damage to the appliance and the environment
!
Observe the type plate. The specifi ed voltage must match
the mains voltage.
DANGER Electrocution
Before beginning any work on the electric installation, 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.
1
1 coding plug
If the appliance should be installed with a different output power,
take the following steps:
Insert the coding plug to the desired performance.
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
Mark the selected output power and voltage on the type plate
with a permanent marker.
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INSTALLATION
COMMISSIONING
6.2 Temperature setting/anti-scalding protection
Connect 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):
Connect the lead of the electronic temperature control to po-
sition „A2“.
Reinstall the plastic cover.
7. Commissioning
7.1 Appliance handover
Explain the functions of the appliance to the user. Draw special
attention to the safety information. Hand the operating and installation instructions to the user.
8. Troubleshooting
Danger of electrocution
To test the appliance, it must be supplied with power.
8.1 Display options LED diagnostic „traffi c lights“
Display options
26_02_02_1089
red illuminates in case of faults
yellow illuminates when the appliance is heating water
green flashing: The appliance is supplied with power
ENGLISH
DANGER Electrocution
Commissioning must onl y be carried out by an authorised
contractor in accordance with safety regulations.
Damage to the appliance and the environment
!
Open hot water faucet for a few minutes until water fl ow
is continuous and all air is purged from water pipes. The
appliance’s plastic cover must be installed before the circuit breaker is turned on.
Turn on circuit breaker to bring electrical power to the
appliance.
Turn the temperature selector clockwise and anti-clockwise,
to calibrate the temperatur selector.
Adjust the water temperature to the desired level using the
knob on the front cover of the appliance.
Turn on hot water and wait twenty seconds until temperature
has stabilized.
Check 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°F - 116°F (42 - 47°C) is recommended for most applications.
Explain to the user how the appliance works and familiarise
him or her with its use.
Advise 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.
A setting of 108°F - 116°F (42 - 47 °C) is recommended for
most applications.
1
1 LED diagnostic „traffi c lights“
8.2 Fault table
Symptom Possible Cause Solution
No hot water
clean faucet aerator or
Not enough hot water filter screen clogged clean filter screen at appli-
Water not hot enough water flow too high
supply correct voltage to
If you are not able to resolve a problem please contact us,
see last side, before removing the appliance from the wall.
STIEBEL ELTRON is happy to provide technical assistance. In
most instances, we can resolve the problem over the phone.
circuit breaker off
safety thermal cut-out
tripped
not enough flow rate to
activate appliance
turn circuit breaker on
reset thermal cut-out
clean filter screen at appliance
shower head
ance
reduce water flow rate until
light on front cover stops
blinking
appliance
9. Normal maintenance
STIEBEL ELTRON tankless water heaters are designed for a very
long service life. Actual life expectancy will vary with water quality and use. The appliance itself does not require any regular
maintenance.
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INSTALLATION
TECHNICAL DATA
However, to ensure consistent water fl ow, it is recommended to
periodically remove scale and dirt that may build up at the aerator of the faucet(s), the fi lter screen in the appliance, or in the
shower head.
10. Technical Data
10.1 Dimensioned drawing
b01
10.2 Wiring diagram
DHC-E 8/10
2/GRD ~ 208 / 240 V
1/N/PE ~ 220 / 230 / 240 V
360 (14.17")
c06
c06 c01
100 (3.94")
8 (0.315")
b01 Electrical cable entry
c01 cold water inlet "NPT 1/2
c06 hot water outlet "NPT 1/2
200 (7.88")
c01
273 (10.75")75 (2.953")
38 (1.5")
110 (4.33")
85_02_03_0001
DHC-E 12
2/GRD ~ 208 / 240 V
1/N/PE ~ 220 / 230 / 240 V
D0000017762
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85_02_03_0002
INSTALLATION
TECHNICAL DATA
10.3 Maximum temperature increase above ambient water temperature
Warm water fl ow rate [ GPM ]
Warm 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
9.6 kW @ 240 V 1.01 1.21 1.45 1.82 2.42 3.63 6.61 - - - DHC-E 12
12 kW @ 240 V 1.26 1.51 1.82 2.27 3.03 4.31 6.61 - - - -
Warm 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
9.6 kW @ 240 V 0.89 1.04 1.21 1.45 1.82 2.42 3.63 6.61 - - DHC-E 12
12 kW @ 240 V 1.11 1.30 1.51 1.82 2.27 2.88 4.31 6.61 - - -
Warm 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
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
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
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 kW @ 208 V 0.95 1.14 1.36 1.70 2.27 3.23 6.47 - - - -
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 kW @ 208 V 0.83 0.97 1.14 1.36 1.70 2.16 3.23 6.47 - - -
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 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
ENGLISH
Warm water fl ow rate [ l/min ]
Warm 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
9.6 kW @ 240 V 3.82 4.58 5.50 6.87 9.16 13.75 25.00 - - - DHC-E 12
12 kW @ 240 V 4.77 5.73 6.87 8.59 11.46 16.32 25.00 - - - -
Warm water outlet temperature 45 °C
Cold water inlet temperature °C 4 10 1 20 25 30 35 40 45 50 55
DHC-E 8/10
9.6 kW @ 240 V 3.35 3.93 4.58 5.50 6.87 9.16 13.75 25.00 - - DHC-E 12
12 kW @ 240 V 4.19 4.91 5.73 6.87 8.59 10.88 16.32 25.00 - - -
Warm 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
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
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
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 kW @ 208 V 3.58 4.30 5.16 6.44 8.59 12.24 24.49 - - - -
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 kW @ 208 V 3.14 3.68 4.30 5.16 6.44 8.16 12.24 24.49 - - -
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 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
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INSTALLATION
SPARE PARTS
10.4 Data table
DHC-E 8/10 DHC-E 12
Part number 224201 230628
Phase 1 1 1 1 1 1 1 1 1 1 1 1
Voltage V 208 220 230 240 208 220 230 240 208 220 230 240
Frequency Hz 50 / 60 50 / 60 50 / 60 50 / 60 50 / 60 50 / 60 50 / 60 50 / 60 50 / 60 50 / 60 50 / 60 50 / 60
Coding plug Position 1 1 1 1 2 2 2 2 - - - Output power kW 5.4 6.0 6.6 7.2 7.2 8.1 8.8 9.6 9 10 11 12
Ampere A 28 30 31 32 35 37 39 40 44 46 48 50
Min. required circuit breaker size A 30 40 40 40 50 50 50 50 60 60 60 60
Recommended wire size AWG COPPER 10 - - 8 8 - - 8 6 - - 6
Recommended wire size mm² COPPER - 6 6 - - 10 10 - - 10 10 Protection level according to IP 24 IP 24
Min. water flow to activate appliance GPM / l/min 0.37 / 1.4 0.37 / 1.4
Nominal water volume GAL / l 0.13 / 0.5 0.13 / 0.5
Working pressure max. PSI / bar / MPa 150 / 10 / 1 150 / 10 / 1
Tested to pressure PSI / bar / MPa 300 / 20 / 2 300 / 20 / 2
Weight lbs. / kg 5.9 / 2.7 5.9 / 2.7
Water connections “ NPT 1/2 1/2
Suitable for supply with up to 131 °F / 55 °C
Tankless water heaters are considered a non-continuous load
Conductors should be sized to maintain a voltage drop of less than
3 % under load
11. Spare parts
1
15
14
2
12
11
10
35
4
13
6
No. No. Spare par t DHC-E 8/10 DHC-E 12
1 Heating system 292575 292576
2 Safety thermal cut out 286369 286369
3 Electronic control appliance 291851 291852
4 Coding plug 283455 --5 Back panel 292578 292578
6 Flow sensor DFE 286461 286461
7 Cold water connection 291699 291699
8 Filter screen 252430 252430
9 Hot water connection 278634 278634
10 Plastic cover 292577 292577
11 Wiring block 279998 279998
12 Axis connection plug 254312 254312
13 Electronic temperature control 286359 286359
14 Temperature adjustment knob 254307 254307
15 Outlet temperature sensor 280677 280677
987
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