STIEBEL ELTRON DHM 6 220 User manual

Hydraulically controlled mini instantaneous water heater
» DHM 6 220
OPERATION AND INSTALLATION

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CONTENTS | SPECIAL INFORMATION
SPECIAL INFORMATION
OPERATION
1. General information �����������������������������������������3
2. Safety����������������������������������������������������������5
3. Appliance description ���������������������������������������6
4. Settings �������������������������������������������������������6
5. Cleaning, care and maintenance ���������������������������6
6. Troubleshooting ����������������������������������������������7
INSTALLATION
7. Safety����������������������������������������������������������7
8. Appliance description ���������������������������������������8
9. Preparations ��������������������������������������������������8
10. Installation����������������������������������������������������9
11. Commissioning ��������������������������������������������� 12
12. Shutting down���������������������������������������������� 13
13. Troubleshooting �������������������������������������������� 13
14. Maintenance ������������������������������������������������ 14
15. Specification ������������������������������������������������ 15
GUARANTEE
ENVIRONMENT AND RECYCLING
SPECIAL INFORMATION
- The appliance may be used by children aged 3
and up and persons with reduced physical, sen-
sory 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 result-
ing risks. Children must never play with the ap-
pliance. Children must never clean the appliance
or perform user maintenance unless they are
supervised.
- 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.
- 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 specified voltage must match the mains
voltage.

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OPERATION
GENERAL INFORMATION
- In the case of damage, the power cable must only
be replaced by a qualified contractor authorised
by the manufacturer using the original spare
part.
- Secure the appliance as described in chapter „In-
stallation/ Installation“.
- Observe the maximum permissible pressure (see
chapter „Specification/ Data table“).
- The specific water resistivity of the mains water
supply must not be undershot (see chapter “In-
stallation / Specification / Data table”).
- Drain the appliance as described in chap-
ter „Installation/ Maintenance/ Draining the
appliance“.
OPERATION
1. General information
The chapter “Operation” is intended for appliance users and qual-
ified contractors.
The chapter “Installation” is intended for qualified contractors.
Note
Read these instructions carefully before using the appli-
ance 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 instructions.
 Steps to prevent the risk are listed.

OPERATION
GENERAL INFORMATION
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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 serious
injury or death.
WARNING Failure to observe this information may result in serious
injury or death.
CAUTION Failure to observe this information may result in non-seri-
ous 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 identified by the symbol
shown on the left.
 Read these texts carefully.
Symbol
Material losses
(appliance damage, consequential losses and environmen-
tal pollution)
Appliance disposal
 This symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
1.3 Units of measurement
Note
Unless specified otherwise, all dimensions are given in
mm.
!
!

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OPERATION
SAFETY
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-do-
mestic 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 hand washbasin.
Any other use beyond that described shall be deemed inappropri-
ate. 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 ex-
cess of 50°C.
There is a risk of scalding at outlet temperatures in ex-
cess of 43°C.
DANGER Electrocution
Any damaged power cables must be replaced by a qual-
ified electrician. This prevents potential hazards from
arising.
!
WARNING Injury
The appliance may be used by children aged 3 and up and
persons with reduced 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 understood
the resulting risks. Children must never play with the
appliance. Children must never clean the appliance or
perform user maintenance unless they are supervised.
!
Material losses
Protect the appliance and tap against frost.
!
Material losses
Only use the special aerator provided. Prevent scale
build-up at the tap outlets (see chapter "Cleaning, care
and maintenance").
2.3 Test symbols
See type plate on the appliance.

OPERATION
APPLIANCE DESCRIPTION
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3. Appliance description
The hydraulically controlled mini instantaneous 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 heat-
ing output and the flow 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 efficient DHW provision
at the hand 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 “Specification/ Data table/ On”.
Increasing the temperature
 Reduce the flow 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 sufficient for cleaning the appliance.
 Check the taps/valves regularly. Limescale deposits at the
spouts can be removed using commercially available descal-
ing 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”).

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INSTALLATION
TROUBLESHOOTING
6. Troubleshooting
Problem Cause Remedy
The appliance will not
start despite the DHW
valve being fully open.
No power to the appli-
ance.
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 qualified contractor. To
facilitate and speed up your request, provide the serial number
from the type plate (000000-0000-000000).
DHM 6-220 Nr.: 000000-0000-000000
INSTALLATION
7. Safety
Only a qualified contractor should carry out installation, commis-
sioning, maintenance and repair of the appliance.
7.1 General safety instructions
We guarantee trouble-free function and operational reliability only
if original accessories and spare parts intended for the appliance
are used.
!
Material losses
Observe the max. permissible inlet temperature. Higher
temperatures may damage the appliance. You can limit
the inlet temperature by means of a central thermostatic
valve (see chapter "Appliance description/ Accessories").

INSTALLATION
APPLIANCE DESCRIPTION
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7.2 Instructions, standards and regulations
Note
Observe all applicable national and regional regulations
and instructions.
The specific electrical resistance of the water must not fall below
that stated on the type plate. In a linked water network, factor in
the lowest electrical resistance of the water (see chapter “Speci-
fication/ Data table”). Your water supply utility will advise you of
the specific 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”
- Connection hose 3/8, 500mm long, with gaskets*
- Tee 3/8*
- Company logo for oversink installation
*for the connection as pressure-tested appliance
8.2 Accessories
Special aerator “SR”*
- SR 5: Part number 270582
* For use in thread M22/M24.
Pressure-tested tap
- WEH Sensor tap for washbasins
ZTA 3/4 - central thermostatic valve
Thermostatic valve for central premixing, for example for operat-
ing an instantaneous water heater with a solar thermal system.
9. Preparations
 Flush the water line thoroughly.
Water installation
A safety valve is not required.
Taps
 Use suitable taps (see chapter “Appliance description/
Accessories”).

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INSTALLATION
INSTALLATION
Note
Fitting the special aerator supplied provides an optimum
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 fixing screws for the cover are always ac-
cessible.
The appliance is only suitable for undersink installation (water
connections at the top).
DANGER Electrocution
Protection rating IP25 is only ensured if the appliance
back panel is fitted.
 Always fit the appliance back panel.
10.2 Installation options
Undersink installation, pressure-tested, with pressure-tested
tap
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INSTALLATION
INSTALLATION
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10.2.1 Appliance installation
 Mount the appliance on the wall.
Note
The wall must have a sufficient load-bearing capacity.
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 Undo the cover fixing screws by two turns.
 Undo the snap fastener using a screwdriver.
 Remove the appliance cover with the heater towards the
front.
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 Using pliers, break out the knock-out for the power cable
in the appliance cover. Correct the contours with a file if
necessary.
 Use the appliance back panel as a drilling template.
 Secure the appliance back panel to the wall with suitable
rawl plugs and screws.
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