ZANKER MDO 35 User manual

Operation and installation
Hydraulically controlled, open
small instantaneous water heater
with bare-wire heating system
MDO 35
MDO 44
MDO 57

2
Inhalt - Special information
SPECIAL INFORMATION
OPER ATION
1. General information .................................................... 4
2. Safety ............................................................................ 5
3. Appliance description................................................. 6
4. Settings......................................................................... 6
5. Cleaning, care and maintenance ............................... 6
6. Troubleshooting ..........................................................7
INSTALLATION
7. Safety ............................................................................8
8. Appliance description................................................. 8
9. Preparations................................................................. 9
10. Installation.................................................................... 9
11. Commissioning.......................................................... 12
12. Shutting down............................................................ 13
13. Troubleshooting ........................................................ 13
14. Maintenance............................................................... 13
15. Specication .............................................................. 14
GUAR ATEE
ENVIRONMENT AND RECYCLING
SPECIAL
INFORMATION
◦The appliance may be used by children
aged 3 and up and persons with re-
duced physical, sensory or mental capa-
bilities or a lack of experience and know-
how, provided that they are supervised
or they have been instructed on how to
use the appliance safely and have un-
derstood the resulting risks. Children
must never play with the appliance. Chil-
dren must never clean the appliance or
perform user maintenance unless they
are supervised.
◦The tap can reach temperatures in
excess of 50 °C. There is a risk of scal-
ding at outlet temperatures in excess of
43 °C.

Special information
3
◦The appliance is not suitable for sup-
plying a shower (shower operation).
◦Ensure the appliance can be separated
from the power supply by an isolator that
disconnects all poles with at least 3 mm
contact separation.
◦ The specied voltage must match the
mains voltage.
◦Connect the appliance permanently to
xed wiring, exception MDO 35.
◦Connect the appliance to earth.
◦In the case of damage, the power cable
must only be replaced by a qualied
contractor authorised by the manufactu-
rer using the original spare part.
◦Secure the appliance as described in
chapter „Installation / Installation“.
◦ Observe the maximum permissible pres-
sure (see chapter „Specication / Data
table“).
◦ The specic water resistivity of the
mains water supply must not be un-
dershot (see chapter “Installation / Spe-
cication / Data table”).
◦ Drain the appliance as described in
chapter „Installation / Maintenance /
Draining the appliance“.

4
Operation
OPER ATION
1. General information
The chapter „Operation“ is intended for appliance users
and qualied contractors.
The chapter „Installation“ is intended for qualied cont-
ractors.
Note
Read these instructions carefully before using the
appliance and retain them for future reference.
Pass on the instructions to a new user if required.
1.1 Safety instructions
1.1.1 Structure of safety instructions
KEYWORD Type of risk
Here, possible consequences are listed that may
result from failure to observe the safety instruc-
tions.
» Steps to prevent the risk are listed.
1.1.2 Symbols, type of risk
Symbol Type of risk
Injury
Electrocution
Burns
(burns, scalding)
1.1.3 Keywords
KEYWORD Meaning
DANGER Failure to observe this information will result in seri-
ous injury or death.
WARNING Failure to observe this information may result in seri-
ous injury or death.
CAUTION Failure to observe this information may result in
non-serious or minor injury.
1.2 Other symbols in this documentation
Note
Notes are bordered by horizontal lines above and
below the text. General information is identied by
the symbol shown on the left.
» Read these texts carefully.
!

Operation
5
Symbol
Material losses
(appliance damage, consequential losses and en-
vironmental pollution)
Appliance disposal
» This symbol indicates that you have to do something.
The action you need to take is described step by
step.
1.3 Units of measurement
Note
Unless specied otherwise, all dimensions are given
in mm.
2. Safety
2.1 Intended use
This appliance is intended 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.
This appliance is designed to heat DHW. The appliance
is designed for one washbasin.
Any other use beyond that described shall be deemed
inappropriate. Observation of these instructions and of
instructions for any accessories used is also part of the
correct use of this appliance.
2.2 General safety instructions
DANGER Scalding
During operation, the tap can reach temperatures in
excess of 50 °C.
There is a risk of scalding at outlet temperatures in
excess of 43 °C.
!
WARNING Injury
The appliance may be used by children aged 3 and
up and persons with reduced physical, sensory or
mental capabilities or a lack of experience and know-
how, provided that they are supervised or they have
been instructed on how to use the appliance safely
and have understood the resulting risks. Children
must never play with the appliance. Children must
never clean the appliance or perform user main-
tenance unless they are supervised.
DANGER Electrocution
Any damaged power cables must be replaced by a
qualied electrician. This prevents potential hazards
from arising.
!
Material losses
Protect the appliance and tap against frost.
!

6
Operation
!
Material losses
Ensure that the non-pressurised appliance is not
exposed to any pressure as this could cause irre-
parable damage:
» Only use the special aerator provided.
» Never use aerators or hoses with aerators.
» Never seal the tap outlets.
» Prevent scale build-up at the tap outlets (see
chapter "Cleaning, care and maintenance").
3. Appliance description
The hydraulically controlled, non-pressurised small in-
stantaneous water heater heats the water directly at the
draw-off point. The heating system starts automatically
when the tap is opened. The short pipe runs ensure that
energy and water losses are minimal.
The DHW output depends on the cold water temperature,
the heating output and the ow rate.
The bare wire heating system is suitable for hard and soft
water areas. This heating system has a low susceptibility
to scale build-up. The heating system ensures quick and
efcient DHW provision at the washbasin.
Fitting the special aerator supplied provides an optimum
water jet.
4. Settings
The appliance heating system switches on automatically
as soon as you open the DHW valve at the tap or activate
the sensor of a sensor tap. The water is heated. The water
temperature can be adjusted at the tap:
For the start volume, see chapter „Specication / Data
table / On“.
Increasing the temperature
» Reduce the ow rate at the tap.
Reducing the temperature
» Open the tap further or add more cold water.
Following an interruption of the water supply
See chapter „Commissioning / Recommissioning“.
5. Cleaning, care and maintenance
» Never use abrasive or corrosive cleaning agents. A
damp cloth is sufcient for cleaning the appliance.
!
Material losses
Scale build-up at the tap outlets can put the appli-
ance under pressure and may cause irreparable
damage.
» Check the taps/valves regularly. Limescale deposits
at the spouts can be removed using commercially
available descaling agents.
» Have the electrical safety of the appliance regularly
checked by an electrician.
» Regularly descale or replace the special aerator (see
chapter „Appliance description / Accessories“).

Operation
7
6. Troubleshooting
Problem Cause Remedy
The appliance will not
start despite the DHW
valve being fully open.
No power to the ap-
pliance.
Check the fuses/
MCBs in your fuse
box.
The aerator in the tap
is scaled up or dirty.
Clean and/or descale
the aerator or replace
the special aerator.
The water supply has
been interrupted.
Vent the appliance
and the cold water
inlet line (see chapter
"Settings").
If you cannot remedy the fault, notify your qualied con-
tractor. To facilitate and speed up your request, provide
the serial number from the type plate (000000-0000-
000000).
MDO ...
Model: 000000
E-Nr:
F-Nr: 0000-00000

8
Installation
INSTALLATION
7. Safety
Only a qualied contractor should carry out installation,
commissioning, maintenance and repair of the appliance.
7.1 General safety instructions
We guarantee trouble-free function and operational relia-
bility only if original accessories and spare parts intended
for the appliance are used.
!
Material losses
Observe the max. permissible inlet temperature. Hig-
her temperatures may damage the appliance. You
can limit the inlet temperature by means of a central
thermostatic valve.
!
Material losses
Only operate the appliance with non-pressurised
taps.
7.2 Instructions, standards and regulations
Note
Observe all applicable national and regional regula-
tions and instructions.
The specic electrical resistance of the water must not fall
below that stated on the type plate. In a linked water net-
work, factor in the lowest electrical resistance of the water
(see chapter „Specication / Data table“). Your water sup-
ply utility will advise you of the specic electrical water
resistance or conductivity.
8. Appliance description
8.1 Standard delivery
The following are delivered with the appliance:
◦Sieve inside the cold water inlet
◦ Special aerator „SR“
◦Company logo for oversink installation
8.2 Accessories
Special aerator „SR“*
◦ SR 3: Part number 289591
for MDO 35 and MDO 44
◦ SR 5: Part number 270582
for MDO 57
* For use in thread M22/M24.
Non-pressurised taps
◦Ü 136 Twin lever basin tap
◦ AHo 40 MTH Oversink installation

Installation
9
9. Preparations
» Flush the water line thoroughly.
Water installation
A safety valve is not required.
Taps
» Use suitable taps (see chapter „Appliance descripti-
on / Accessories“).
Note
Fitting the special aerator supplied provides an op-
timum water jet.
10. Installation
10.1 Installation site
Install the appliance in a room free from the risk of frost
and near the draw-off tap.
Ensure that the lateral xing screws for the cover are al-
ways accessible.
The appliance is suitable for undersink installation (water
connections at the top) and oversink installation (water
connections at the bottom).
DANGER Electrocution
Protection rating IP25 is only ensured if the applian-
ce back panel is tted.
» Always t the appliance back panel.
10.2 Installation options
10. 2.1 Undersink installation, non-pressurised, with
non-pressurised tap
26_02_05_0035
Appliance installation
» Mount the appliance on the wall.
Note
The wall must have a sufcient load-bearing capa-
city.

10
Installation



26_02_05_0042
» Undo the cover xing screws by two turns.
» Undo the snap fastener using a screwdriver.
» Remove the appliance cover with the heater towards
the front.
» Using pliers, break out the knock-out for the power
cable in the appliance cover. Correct the contours
with a le if necessary.
26_02_05_0084
» Use the appliance back panel as a drilling template.
» Secure the appliance back panel to the wall with sui-
table rawl plugs and screws.

Installation
11



26_02_05_0085
» Route the power cable through the cable entry in the
back panel.
» Hook in the appliance cover with the heater at the
bottom.
» Click the heater into place using the snap fastener.
» Secure the appliance cover with the cover xing
screws.
Tap installation
!
Material losses
When making the connections, counter the torque
on the appliance using a size 14 spanner.
» Install the tap. For this, also observe the tap opera-
ting and installation instructions.
10.2.2Oversink installation, non-pressurised, with
non-pressurised tap
26_02_05_0081_
Tap installation
» Install the tap. For this, also observe the tap opera-
ting and installation instructions.
!
Material losses
» When making the connections, counter the tor-
que on the appliance using a size 14 spanner;
see chapter "Installation alternatives / Under-
sink installation".
Appliance installation
» Fit the appliance to the tap with the water
connections.

12
Installation
10.3 Connecting the power supply
DANGER Electrocution
Carry out all electrical connection and installation
work in accordance with regulations.
DANGER Electrocution
Ensure that the appliance is earthed.
Ensure the appliance can be separated from the
power supply by an isolator that disconnects all
poles with at least 3 mm contact separation.
DANGER Electrocution
The appliances are delivered with a power cable
(MDO 35 with plug).
Connection to a permanent power supply is pos-
sible, provided the xed cable has a cross-section
that is at least equal to that of the standard power
cable of the appliance. A maximum cross-section of
3 x 6 mm² may be used.
» If the appliance is installed over the sink, route
the power cable behind the appliance.
!
Material losses
When making the connection to a standard safety
socket (in the case of a power cable with plug), en-
sure that the socket is freely accessible after the
appliance has been installed.
!
Material losses
Take note of the type plate. The specied voltage
must match the mains voltage.
» Connect the power cable as shown in the wiring dia-
gram (see chapter „Specication / Wiring diagram“).
11. Commissioning
11.1 Initial start-up
26_02_05_0087
» Fill the appliance by running the tap several times
until the pipework and appliance are free of air.
» Carry out a tightness check.
» Insert the power cable plug, if present, into the stan-
dard safety socket or set the fuse/MCB.
» Check the function of the appliance.
» In the case of oversink installation, afx the company
logo supplied over the existing company logo.
11.2 Appliance handover
» Explain the appliance function to users and familiari-
se them with its operation.
» Make users aware of potential dangers, especially
the risk of scalding.
» Hand over these instructions.

Installation
13
11.3 Recommissioning
!
Material losses
Following an interruption of the water supply, recom-
mission the appliance by carrying out the following
steps, in order to prevent irreparable damage to the
bare wire heating system.
» Isolate the appliance from the power supply. Pull the
power cable plug, if present, from the socket, or re-
move the fuse/reset the MCB.
» See chapter „Initial start-up“.
12. Shutting down
» Isolate the appliance from the power supply by
means of the fuse/MCB in your fuse box or by pulling
the power cable plug from the socket.
» Drain the appliance (see chapter „Maintenance“).
13. Troubleshooting
Problem Cause Remedy
The appliance will not
start despite the DHW
valve being fully open.
The aerator in the tap
is scaled up or dirty.
Clean and/or descale
the aerator or replace
the special aerator.
The sieve in the cold
water line is blocked.
Clean the sieve after
shutting off the cold
water inlet line.
The heater is faulty. Check the resistance
of the heating system
and replace the appli-
ance if required.
14. Maintenance
DANGER Electrocution
Before any work on the appliance, disconnect all
poles from the power supply.
14.1 Draining the appliance
DANGER Scalding
Hot water may escape during the draining process.
If the appliance needs to be drained for maintenance or to
protect the whole installation when there is a risk of frost,
proceed as follows:
» Close the shut-off valve in the cold water inlet line.
» Open the draw-off valve.
» Undo the water connections on the appliance.

14
Installation
14.2 Cleaning the strainer
You can clean the tted strainer after removing the cold
water supply pipe.
26_02_05_0065_
14.3 Tests in accordance with
VDE 0701/0702
Earth conductor check
» Check the earth conductor (in Germany e.g. DGUV
A3) on the earth conductor contact of the power
cable and on the appliance connector.
Insulation resistance
» If an appliance with a rated heating output of
> 3.5 kW does not achieve an insulation resistance
of 300 kΩ, we recommend that the insulating pro-
perties of the appliance are checked by conducting
a differential current test of the earth conductor cur-
rent / leakage current to VDE 0701/0702 (Fig. C.3b).
14.4 Appliance storage
» Store the dismantled appliance in a room free from
the risk of frost, as water residues remaining inside
the appliance can freeze and cause damage.
14.5 Replacing the power cable for the
MDO 57
» If replacing the cable for the MDO 57, use a power
cable with 4 mm² cross-section.
15. Specication
15.1 Dimensions
95
28
30
120
143
190
4,8
165
82
20
b02
b03
c06
c01
D0000018336
b02 Entry electrical cables I
b03 Entry electrical cables II
c01 Cold water inlet Male thread G 3/8 A
c06 DHW outlet Male thread G 3/8 A

Installation
15
15.2 Wiring diagram
15.2.1 MDO 35-57
1/N/PE ~ 200-240 V
L N
V
85_02_05_0002
15.3 Increasing the temperature
At 230 V, the following water temperature increases result:
1,4 1,8 2,2 2,6 3,0 3,4
20,0
22,5
25,0
27,5
30,0
32,5
35,0
37,5
40,0
42,5
45,0
3
2
1
84_02_02_0056
X Flow rate in l/min
Y Temperature increase in K
1 3.5 kW - 230 V
2 4.4 kW - 230 V
3 5.7 kW - 230 V
Example MDO 35 with 3.5 kW
Flow rate l/min 2.0
Increasing the temperature K25
Cold water supply temperature °C 12
Maximum possible outlet temperature °C 37

16
Installation
Note
An outlet temperature of 50 °C can be achieved with
the lowest possible ow rate and the following cold
water inlet temperatures:
◦MDO 35 > 18 °C
◦MDO 44 > 21 °C
◦MDO 57 > 22 °C
15.4 Application areas
For the specic electrical resistance and
specic electrical conductivity, see „Data
table“.
Standard specifica-
tion at 15 °C 20 °C 25 °C
Spec.
re-
sistan-
ce ρ ≥
Spec. conduc-
tivity σ ≤
Spec.
re-
sistan-
ce ρ ≥
Spec. conduc-
tivity σ ≤
Spec.
re-
sistan-
ce ρ ≥
Spec. conduc-
tivity σ ≤
Ωcm mS/m μS/cm Ωcm mS/m μS/cm Ωcm mS/m μS/cm
900 111 1111 800 125 1250 735 136 1361
1000 100 1000 890 112 1124 815 123 1227
1100 91 909 970 103 1031 895 112 1117
1200 83 833 1070 93 935 985 102 1015
1300 77 769 1175 85 851 1072 93 933
15.5 Test symbols
See type plate on the appliance.

Installation
17
15.6 Energy consumption data
The product data complies with EU regulations relating
to the Directive on the ecodesign of energy related pro-
ducts (ErP).
MDO 35 MDO 44 MDO 57
222117 222118 222119
Manufacturer Zanker Haustechnik Zanker Haustechnik Zanker Haustechnik
Load profile XXS XXS XXS
Energy efficiency class AAA
Energy conversion efficiency %39 38 38
Daily power consumption kWh 2.200 2.200 2.200
Annual power consumption kWh 477 478 478
Sound power level dB(A) 15 15 15
Special information on measuring efficiency None None None
15.7 Data table
MDO 35 MDO 44 MDO 57
222117 222118 222119
Electrical details
Rated voltage V220 230 240 220 230 240 220 230 240
Rated output kW 3.2 3.53 3.8 4.0 4.4 4.8 5.2 5.7 6.2
Rated current A 14.5 15.2 15.8 18.2 19.1 20.0 23.6 24.7 25.8
Fuse A16 20 25 25 32
Frequency Hz 50/60 50/60 50/60
Phases 1/N/PE 1/N/PE 1/N/PE
Max. mains impedance at 50 Hz Ω 0.394 0.377 0.361
Specific resistance ρ15 ≥ Ω cm 1100 1100 1100
Specific conductivity σ15 ≤μS/cm 909 909 909

18
Installation
MDO 35 MDO 44 MDO 57
Connections
Water connection G 3/8 A G 3/8 A G 3/8 A
Application limits
Max. permissible pressure MPa 000
Values
Max. permissible inlet temperature °C 35 35 35
ON l/min >1.6 >2.0 >2.6
Pressure drop at flow rate MPa 0.05 0.06 0.08
Flow rate for pressure drop l/min 1.6 2.0 2.6
Flow rate limit at l/min 2.2 2.8 4.3
DHW delivery l/min 2.0 2.5 3.2
Δϑ at DHW delivery K25 25 25
Hydraulic data
Rated capacity l0.1 0.1 0.1
Versions
Oversink installation X X X
Undersink installation X X X
Open vented type X X X
Protection class 1 1 1
Insulation block Plastic Plastic Plastic
Heating system heat generator Bare wire Bare wire Bare wire
Cap and back panel Plastic Plastic Plastic
IP-Rating IP25 IP25 IP25
Dimensions
Height mm 143 143 143
Width mm 190 190 190
Depth mm 82 82 82
Length of connecting cable mm 700 700 700

19
Installation | Guaratee | Environment and recycling
MDO 35 MDO 44 MDO 57
Weights
Weight kg 1.4 1.4 1.4
Note
The appliance conforms to IEC 61000-3-12.
Guarantee
The guarantee conditions of our German companies do not
apply to appliances acquired outside of Germany. In countries
where our subsidiaries sell our products a guarantee can only
be issued by those subsidiaries. Such guarantee is only grant
-
ed if the subsidiary has issued its own terms of guarantee. No
other guarantee will be granted.
We shall not provide any guarantee for appliances acquired in
countries where we have no subsidiary to sell our products.
This will not aect warranties issued by any importers.
Environment and recycling
We would ask you to help protect the environment.
After use,
dispose of the various materials in accordance with national
regulations.
GUAR ATEE
ENVIRONMENT AND RECYCLING

Vertriebszentrale
EHT Haustechnik GmbH
Markenvertrieb ZANKER
Gutenstetter Straße 10
90449 Nürnberg
[e-mail]
www.zanker-haustechnik.de
Tel. [phone]
Fax [phone]
Kundendienstzentrale
Holzminden
Fürstenberger Str. 77
37603 Holzminden
Briefanschrift
37601 Holzminden
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den nachfolgenden Telefon- bzw. Telefaxnummern erreichbar:
Kundendienst
Tel. [phone]
Fax [phone]
[e-mail]
Ersatzteilverkauf
Tel. [phone]
Fax [phone]
[e-mail]
[e-mail]
www.zanker-haustechnik.de
© EHT Haustechnik
Datum/Version Was Auftraggeber Bearbeiter
02.02.08/0806 Kontaktadresse Russia angelegt K. Kaufmann M. Me-
ckle
07.02.08/0807 „Russia“ in Kontakt Russia gelöscht K. Kaufmann M. Me-
ckle
23.04.08/0817 EHT Russland NEU Meckle Hai
09.10.2009 Telefonkosten eingefügt M.Risse
30.06.2010 Datum bei Telefonkosten raus Uhl
04.11.2010 Ergänzung Tel und email bei Kundendienst
und Ersatzteilverkauf
Borowski /
Weber
Uhl
22.08.2011 Übersetzungen Disclaimer zugefügt Uhl
Adressen und Kontakte
ZANKER is a registered trademark used under license from AB Electrolux (publ).
Irrtum und technische Änderungen vorbehalten! | Subject to errors and technical changes! | Sous réserve d‘erreurs et de modications
techniques! | Onder voorbehoud van vergissingen en technische wijzigingen! | Salvo error o modicación técnica! | Rätt till misstag
och tekniska ändringar förbehålls! | Excepto erro ou alteração técnica | Zastrzeżone zmiany techniczne i ewentualne błędy | Omyly a
technické změny jsou vyhrazeny! | A muszaki változtatások és tévedések jogát fenntartjuk! | Отсутствие ошибок не гарантируется.
Возможны технические изменения. | Chyby a technické zmeny sú vyhradené! 1606
A 291363-40653-1818 B 272868-40653-1818
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