Dimplex DEE 1521 User manual

Assembly and
operating instructions
English
DEE 1521
DEE 2127
DEE 1521, DEE 2127
Instantaneous water heater

EN-2 6721873500 (2023/07) www.dimplex.de
English DEE 1521, DEE 2127
1 Notes on safe operation .....................................................................................................................3
1.1 General safety instructions ..........................................................................................................3
2 Information on the device .................................................................................................................4
2.1 Declaration of conformity.............................................................................................................4
2.2 Included in the scope of supply .................................................................................................4
2.3 Dimensions ........................................................................................................................................5
2.4 Device overview ...............................................................................................................................5
2.5 Transport and storage....................................................................................................................5
3 Operating manual.................................................................................................................................6
3.1 Control panel.....................................................................................................................................6
3.2 Before commissioning the device .............................................................................................6
3.3 Switching the device on/off ........................................................................................................6
3.4 Setting the temperature................................................................................................................6
3.5 Re-commissioning after a blackout ..........................................................................................7
3.6 Re-commissioning after an interruption to the water supply ..........................................7
3.7 Cleaning..............................................................................................................................................7
3.8 After-sales service ...........................................................................................................................7
4 Installation...............................................................................................................................................8
4.1 Important notes ...............................................................................................................................8
4.2 Selecting an installation location................................................................................................8
4.3 Unpacking the device and removing the casing ..................................................................9
4.4 Water connection ......................................................................................................................... 10
4.5 Attaching the rear of the device.............................................................................................. 10
4.6 Cable entry, device alignment.................................................................................................. 11
4.7 Mounting the hydraulic block .................................................................................................. 13
4.8 Purging the device ....................................................................................................................... 14
4.9 Specifying the operating parameters .................................................................................... 14
5 Electrical connection........................................................................................................................ 16
5.1 Electrical connection................................................................................................................... 16
5.2 Installing the device covers....................................................................................................... 18
6 Commissioning the device............................................................................................................. 19
7 Maintenance ....................................................................................................................................... 19
8 Faults ..................................................................................................................................................... 20
9 Technical data .................................................................................................................................... 21
9.1 Technical device information ................................................................................................... 21
9.2 Energy consumption related product data.......................................................................... 22
10 Disposal................................................................................................................................................. 22
11.Warranty, service ............................................................................................................................... 24

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1 Notes on safe operation
1.1 General safety instructions
1.1.1 General notes
Read this manual prior to use and keep it safe.
Observe the safety instructions and warnings.
Comply with national and regional regulations,
technical rules and guidelines.
Document any work carried out.
1.1.2 Intended use
The device has been developed to heat up potable
water. The device is designed for domestic use only.
If the use is identical to domestic use, the device can
also be used in non-domestic environments, e.g. in of-
fices.
Any other use is not intended.
Mount and use the device as described in the text
and illustrations.
This device is intended to be used at altitudes up
to 2,000 m above sea level.
The device must only be installed in rooms pro-
tected from frost.
Only install the device in closed systems.
Observe the country specific regulations, guide-
lines and standards applicable to potable water.
ATTENTION!
In the event of faults or water leaking from
the device, immediately disconnect it from
the power supply and shut the cold water
inlet.
1.1.3 Installation
The installation instructions are designed for profes-
sionals in water installations, heating and electrical
engineering. The instructions in all system-relevant
manuals must be followed. Failure to observe the in-
structions can leads to property damage or injury and
even loss of life.
Read the installation instructions prior to installa-
tion (see chapter 4.).
You must comply with the legal regulations appli-
cable in the country of installation as well as the
regulations of the local energy and water supply
companies.
Install the device in cold water and potable water
circuits (closed circuits).
Only a licensed professional may perform the in-
stallation.
Always switch off the power supply before open-
ing the device.
To avoid dangerous situations, repairs and main-
tenance may only be performed by licensed pro-
fessionals.
The device is suitable for connection to plastic
pipes tested by the DVGW (German Technical and
Scientific Association for Gas and Water).
The device belongs to protection class 1 and must
be connected to the protective earth.
The device must be permanently connected to
the power supply.
The conductor cross section must be adapted to
the power to be installed (see chapter 9.).
NOTE
i
The earthed pipes of the device can make it appear as
though the device is earthed. The device must be
connected to the protective earth.
An all-pole circuit breaker must be provided to
meet applicable safety standards. The contact
opening must be at least 3 mm.
Ensure that the maximum and minimum inlet
water pressure matches the value specified by the
manufacturer (see chapter 9.).
Taps and fittings must be approved for use with
equipment that operates in a closed circuit (under
pressure).
NOTE
i
The inlet temperature must be no more than 55 °C.
ATTENTION!
If the device receives heated water, e.g. via
a solar system, the selected or maximum
permissible temperature may be exceeded.
In this case, place a thermostat valve up-
stream of the device to limit the temperature.

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ATTENTION!
Before installing the device, ensure that the
power supply is disconnected and the water
supply is shut off.
Establish the water connection before connecting
the electricity.
According to standard EN 60335-2-35, instanta-
neous water heaters used for shower applications
must be limited to a maximum of 55 °C (see
chapter 4.9.2.).
The specific electrical resistance of the water
must not be less than 1300 Ohm/cm. Ask the
local water utility company about the electrical re-
sistance of the water.
The device is suitable for the water supply of sev-
eral points of use, including bathtubs.
On the rear of the device, create only those open-
ings that are necessary for installation. If you are
re-installing the device, any openings that are not
used must be sealed water tight.
Live parts must not be accessible after mounting.
1.1.4 Cleaning, maintenance
Do not use any abrasives or solvents or alcohol-
based products for cleaning.
Do not use steam cleaners.
Maintenance may only be performed by licenced
professionals.
Prior to any maintenance work, disconnect the
device from the power.
If limescale forms, clean or replace the spray reg-
ulator or shower heads.
1.1.5 Children and impaired persons
This device may be used by children aged 3 years and
above as well as persons with reduced physical, sen-
sory or mental capabilities or lack of experience and
knowledge provided that they have been given super-
vision or instruction concerning use of the device in
a safe way and understand the risks involved.
Children must no play with the device.
Cleaning and maintenance must not be performed by
unsupervised children.
2 Information on the device
2.1 Declaration of conformity
This product complies with European and national re-
quirements in terms of design and operating behaviour.
The CE marking declares the conformity of
the product with all applicable EU legisla-
tion providing for the affixing of this mark-
ing.
The full text of the declaration of conform-
ity is available on the internet at: www.dimplex.de.
2.2 Included in the scope of supply
Isolating valve
Connecting nipple ½" (2x)
Screws (4x)
Dowels (4x)
Flat gaskets (4x)
Flow limiter disc
Jumpers (2x)
Fastening material
Documents for the device

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2.3 Dimensions
All dimensions are in mm
Cable entry, mounting dimensions in mm
2.4 Device overview
2.5 Transport and storage
The device must be stored in a dry place that is pro-
tected from frost.
During handling:
Do not drop the device.
Transport the device in its original packaging and
use a suitable means of transport.
Only remove the device from its packaging at
the installation area.
1 Jumpers (device configuration)
2 Reset button
3 Volume flow meter
4 Water filter and flow limiter
5 Feeding the power supply line
6 Cold water inlet ½"
7 Hot water outlet ½"
8 Lower cable entry
9Clamp
10 Temperature sensors
11 Heating resistors
12 Upper cable entry
13 Fixing position

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3 Operating manual
Carefully read and observe the detailed safety instruc-
tions at the start of this manual.
NOTE
i
The device heats the water flowing through it.
3.1 Control panel
3.2 Before commissioning the device
NOTE
i
The initial commissioning of the device must be per-
formed by a qualified professional. All required infor-
mation for the proper operation of the device must be
made available to customers.
NOTE
i
Never operate the device without water supply. This
can damage the heating elements.
3.3 Switching the device on/off
Switching on
Open the hot water tap.
The device is switched on. The water heats up as it
flows through the device.
Switching off
Close the hot water tap.
3.3.1 LED status display
3.4 Setting the temperature
The setting range for the domestic hot water temper-
ature is 20 °C to 60 °C.
To select a hot water temperature within this range,
turn the temperature selection dial left or right.
To avoid wasting energy and prevent premature calci-
fication of the device, select the desired temperature
as precisely as possible on the device.
NOTE
i
The device makes it possible to regulate the potable
water temperature precisely and can therefore be
connected directly to the shower. If the device is
nevertheless operated with a thermostatic fitting, the
temperature recommended by the fitting’s manufac-
turer must be set on the device. If there are no clear
specifications, we recommend setting a temperature
of 50 °C.
1 Operating status LED
2 Temperature preselection for the bathtub
3 Temperature preselection for washing dishes
4 Maximum temperature
5 Temperature selection dial
6 Minimum temperature
7 Temperature preselection for washing hands
8 Temperature preselection for showering
LED Device status
Off The device is switched off
White LED The device is switched on
The white LED
flashes
(once a second)
The device is not reaching the set
temperature. The device has reached
the performance limit (see
chapter 8.).
The white LED
flashes
(twice a second)
Ventilation mode is active, the device
switches on with a delay.
Red LED Malfunction of the device (see
chapter 8.)
The white LED
flashes 4 times
The water inlet temperature is higher
than the temperature selected on the
device (solar). The device does not
heat up.

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3.4.1 Temperature preselection
The following positions are recommended for hand
washing, showering, bathing and dishwashing uses:
To make the selection, turn the temperature selection
dial to the corresponding symbol and select the de-
sired operating mode.
3.4.2 Minimum and maximum temperature
In addition to the specified temperatures, it is possible
to set another temperature in the range of 20 °C to
60 °C.
Minimum temperature
To set the minimum temperature of 20 °C, turn the
dial as far left as possible.
Maximum temperature
To set the maximum temperature of 60 °C, turn the
dial as far right as possible.
NOTE
i
Under certain usage conditions and for short periods
of time, the water temperature can reach up to 70 °C.
The hot water outlet pipes can reach equally high
temperatures and there is a risk of scalding if you
come into contact with them.
Temperature reduction see chapter 4.9.2..
ATTENTION!
Risk of scalding in case of contact with hot
water. Always check the pre-set water tem-
perature.
3.4.3 Winter mode
NOTE
i
In winter, the inlet temperature can be particularly low
and the selected temperature might not be reached.
In this case, reduce the volume flow on the hot water
tap until the desired hot water temperature is
reached.
3.5 Re-commissioning after a blackout
After a blackout, leave the hot water tap running until
hot water comes out.
3.6 Re-commissioning after an interruption to
the water supply
Disconnect the device from the power supply
(switch off the fuses).
Open the hot water tap until all air has been
flushed out of the pipes.
Close the hot water tap.
Switch the fuses back on.
Open the hot water tap and let the water run for at
least one minute.
It is only then that the device is in operation again.
3.7 Cleaning
Do not use any abrasives or solvents or alcohol-
based products.
Do not use steam cleaners.
Clean the outer cases with a mild detergent.
Remove dirt and calcium residue.
3.8 After-sales service
Whenever you call after-sales service, state the
Enumberofthedevice.TheE number is on the type
plate underneath the front plate.
Remove the front plate and make a note of the E num-
ber on the type plate.
Operation Approximate
temperature
Washing hands 35 °C
Showering 38 °C
Filling the bathtub 42 °C
Washing dishes 48 °C
A
B

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4 Installation
4.1 Important notes
NOTE
i
Installation, electrical connection and commissioning
may only be carried out by licensed professionals.
NOTE
i
For proper installation and operation of the product,
comply with all applicable national and regional regu-
lations, technical rules and directives.
ATTENTION!
Before commencing installation work, switch
off the power supply in the distribution cabi-
net and turn off the water supply.
ATTENTION!
If preheated water is used, the hot water
temperature on the device may exceed the
set maximum temperature. To avoid scald-
ing, install a thermostatic valve upstream of
the device to limit the inflow temperature.
NOTE
i
Only remove the device from its packaging at the in-
stallation area. Handle the device with care.
NOTE
i
Establish the water connections first.
Disconnect the electrical connections from the power
supply and ensure that they are grounded.
NOTE
i
Flush the device before turning on the power supply.
To do this, open the hot water tap completely and let
the water run for about 1 minute.
4.2 Selecting an installation location
NOTE
i
Choose a wall that is sufficiently stable to bear the
weight of the device. Use the fastening material sup-
plied with the device.
Select dowels to suit the wall composition.
Mount the device vertically so that the hydraulic con-
nections are at the bottom.
Installation location.
Comply with applicable guidelines.
Install the device in a room where the temperature
never drops below 5 °C.
Do not install the device in locations that are more
than 2,000 m above sea level.
Install the device near the most frequently used
tap to minimise heat loss and waiting times.
Install the device in a place where maintenance
work can be performed.
Install the device under consideration of the volt-
age specified on the type plate.
Protection area
Protection areas
Electrical connection Degree of
protection
Acceptable
mounting area
See section “5.1 Elec-
trical connection”
IP 25 Protection area 1
and above
0Protectionarea0
1Protectionarea1
2Protectionarea2
2* Without the wall, protection area 2 must extend to
600 mm from the bathtub
A 600 mm radius from bathtub or shower

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4.3 Unpacking the device and removing the casing
NOTE
i
If transport damage is visible, the device must not be
installed.
Unpack the device.
Dispose of the packaging according to the applicable
recycling regulations.
Remove the front panel of the device (A, B).
Loosen the fastening screw of the casing (C).
Loosen (D, E) and remove the casing (F).
Turn the domestic hot water pipe (G).
Open the side fastening elements of the hydraulic
block (H).
Remove the hydraulic block from the back side (J).
A
B
C
D
E
F
G
H
H
J

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4.4 Water connection
NOTE
i
Ensure that the piping can withstand a maximum
pressure of 10 bar and a maximum temperature of
90 °C.
NOTE
i
Any dirt present can lead to a reduction in the volume
flow or even clogging. Flush the water circuit prior to
installing the device.
Accessories
NOTE
i
The accessories included in the scope of supply of
supply must be used as shown in the “Water connec-
tion accessories” graphic.
NOTE
i
Only use taps and fittings that are approved for use
with equipment that operates in a closed circuit (un-
der pressure).
Water connection markings
Mark cold water and hot water lines accordingly to
avoid confusion.
Installing water connection accessories
NOTE
i
When installing the isolating valve, ensure that the
handle of the isolating valve faces downwards.
Water connection accessories
4.5 Attaching the rear of the device
Establish an opening (A) on the rear of the device.
1 Cold water inlet (G ½")
2 Hot water outlet (G ½")
A

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Support the device on the cold water accessory to
make it easier to mark the wall (B).
Mark the drill hole (C). Make sure that the device is
straight and aligned vertically.
Separate the parts for attaching the device.
Drill marking, insert dowel and screw the device
mounting parts onto the wall.
Mount the rear of the device onto the wall.
4.6 Cable entry, device alignment
The power supply line can be inserted at three differ-
ent positions:
a. upper connection
b. lower connection
c. lower connection for short cables
Possible positions for cable entry
B
C

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NOTE
i
The opening of the cable entry must tightly enclose
the power supply line so that no water can enter. If
necessary, seal the cable entry.
Adjust the cable entry to the diameter of the power
supply line.
Feed the power supply line through the cable entry,
making sure that it is well sealed.
Correct cable entry (top section of the graphic)
NOTE
i
The power supply cable must be inserted at least 40
mm into the device, unless you have chosen the lower
connection point for short cables.
Unevenness between the device and the wall in the
range of 2-8 mm can be compensated by adjusting
the upper mounting device.
If necessary, use the lower spacers (1) to align the rear
of the device parallel to the wall.

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If the power supply cable has to be laid behind the
rear wall of the device, sufficient space must be left
between the device and the wall. A maximum of
16 mm can be compensated by adjusting the upper
mounting device.
Use the lower spacers to align the rear of the device
parallel to the wall.
For additional safety, the spacers can be screwed to
the wall.
Finally, tighten the upper fastening device.
4.7 Mounting the hydraulic block
Fit the cold water flexi hose (A) and hot water pipe (B)
into the sealing diaphragm.
Swivel the hydraulic block upwards (C).
A
C
B

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Engage the hydraulic block in the lateral holders (D).
Attach flat gaskets (E) to the water connections and
tighten water connections.
Check that the system is sealed tight.
4.8 Purging the device
Open the water inlet.
Open the hot water valve (1) for one minute to purge
the device.
4.9 Specifying the operating parameters
The following parameters can be pre-set:
maximum electrical power
maximum hot water temperature
Priority switching in connection with other con-
sumers (e.g. electric heating, stove).
Several parameters can be defined.
ATTENTION!
This must only be performed by licensed
professionals. Disconnect the device from
the power supply prior to performing any
work.
Set the parameters with the included link cables.
Retain removed link cables.
D
D
EE

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4.9.1 Specifying the maximum electrical power
Specify the maximum power of the device using link
cables J2 and J3 according to the table below.
If you change the default setting, note the new maxi-
mum power on the type plate of the device.
NOTE
i
If you are changing the power of the device, check
which flow limiter should be used (see chapter 9.).
4.9.2 Specifying the maximum temperature
Set the maximum hot water temperature generated
by the device using link cables J4 and J5 according to
the table below.
DEE 1521 DEE 2127 Link cables J2 / J3
21 kW
(Default setting)
27 kW
(Default setting)
18 kW 24 kW
15 kW 21 kW
Maximum temperature Link cables J4 / J5
60 °C
=> default setting
53 °C
=> required if the device is oper-
ated on a shower
48 °C
=> power saving setting
42 °C
=> special protection of persons
in need

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4.9.3 Providing a load shedding circuit
If the device is to have priority in connection with
other consumers such as electric storage heaters, a
special load shedding relay (accessory BZ 45L21) is
required. Only electronic load shedding relays guar-
antee proper functionality.
In this type of installation, the secondary device is
switched off when the primary device starts
NOTE
i
If installed with other devices, the instantaneous
water heater can only be used as the primary device.
The instantaneous water heater cannot be used as the
secondary device (AUX).
Secondary device connection
Load shedding principle
Remove link cable J1 to activate “load shedding relay”
mode in the electronics of the device, see table below.
Load shedding relay Link cable J1
Deactivated
=> default setting
Activated
=> function of the instantaneous
water heater has priority over
other consumers

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5 Electrical connection
General notes
ATTENTION!
This must only be performed by licensed
professionals. Disconnect the device from
the power supply prior to performing any
work.
ATTENTION!
The device must have a separate connection
in the distribution box and be protected by a
30 mA residual current circuit breaker and
protective earth.
NOTE
i
In areas with frequent lightning strikes, provide addi-
tional lightning protection equipment.
5.1 Electrical connection
The supply connection terminal block can be
mounted at the top or bottom of the device.
The electrical connection can be established in three
different ways:
Connection at the top
Connection at the bottom
Connection at the bottom for short cables
Establish electrical connections according to the po-
sition of the power supply line.
The connection terminals must be arranged to corre-
spond to the figures below.
Connection at the top
Connection at the bottom
Connection at the bottom for short cables
Maximum length for short power line
The maximum cable length for short power lines is
70 mm.
NOTE
i
The opening of the cable entry must tightly enclose
the power supply line so that no water can enter.
If necessary, seal the cable entry.
A > 150 mm
B≤70 mm

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Procedure for the connection at the bottom for short
cables
Loosen the snap-in connection by pushing it with
ascrewdriver.
Remove the sealing membrane of the device.
Pull on the end of the cable entry to unfold the cable
guard.
Cut the end of the cable entry according to the diam-
eter of the power supply cable so that it seals tight.
Guide the power supply line through the cable entry
so that at least 10 mm of the sheathing of the power
supply line is covered.
Dimension for sheathing of the power supply line
A≥10 mm

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Snap the sealing diaphragm back onto the rear wall.
Connect the supply line to the connection terminals
of the device.
NOTE
i
Position the power supply line so that the cover of the
device can be fastened without obstruction.
5.2 Installing the device covers
Before attaching the cover, connect the control cable
of the control panel to the printed circuit board.
NOTE
i
If the control panel is not connected, the device is set
to a temperature of 42 °C.
Affix the cover of the device (A, B, C).
Tighten the fastening screw of the cover (D).
Attach the front panel (E)
A
B
C
D
E

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6 Commissioning the device
NOTE
i
The initial commissioning of the instantaneous water
heater must be performed by a licensed professional.
All required information for the proper operation of
the device must then be made available to the cus-
tomer.
Open the inlet valve.
Check that all connections are tight.
Switch on the fuses in the distribution system.
Initial commissioning
NOTE
i
To start, the device needs a minimum water pressure
and minimum flow rate (see chapter 9.).
Open the hot water tap completely and let the water
run.
First, the LED flashes (twice a second) for venting op-
eration.
For safety reasons, the device only starts heating the
water after approx. 1 minute (LED lights up).
If the device does not heat the water:
Replace the aerators in domestic hot water taps.
Remove the flow limiter of the shower.
Open the closure (A) and clean the filter (B) of the
device (see next figure)
Remove the flow limiter (C) of the device (see next
figure).
Tell users how the device works and show them how
to operate it.
Hand all device documents to the user.
NOTE
i
If the device does not switch on due to the volume
flow in the inlet being too low, remove the flow limiter
of the device.
Removing the flow limiter of the device
7 Maintenance
ATTENTION!
This must only be performed by licensed
professionals. Disconnect the device from
the power supply and shut off the water sup-
ply before carrying out any maintenance
work.
Inspection, maintenance and repair
Inspection, maintenance and repair may only be
performed by authorised professionals.
Only use genuine spare parts from the manufac-
turer. No liability is accepted for damage caused
by spare parts not supplied by the manufacturer.
Replace seals removed during maintenance work
with new ones.
NOTE
i
After performing maintenance work, press the reset
key See section “2.4 Device overview” to restart the
device.
A
C
B