STIEBEL ELTRON PHB 18 Instruction Manual

OPERATION AND INSTALLATION
OBSLUHA A INSTALACE
OBSŁUGA I INSTALACJA
ОБСЛУЖВАНЕ И ИНСТАЛИРАНЕ
ЭКСПЛУАТАЦИЯ И УСТАНОВКА

Hydraulically controlled comfort instantaneous water heater| Komfortní hydraulicky řízený průtokový
ohřívač| Hydraulicznie sterowany komfortowy przepływowy ogrzewacz wody| Хидравлично
контролиран комфортен проточен бойлер| Проточный водонагреватель повышенной
комфортности с гидравлическим управлением|

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Made in Germany

CONTENTS | SPECIAL INFORMATION
SPECIAL INFORMATION
OPERATION
1. General information �����������������������������������������3
1.1 Safety instructions����������������������������������������������� 3
1.2 Other symbols in this documentation ����������������������� 3
1.3 Units of measurement ������������������������������������������ 3
2. Safety����������������������������������������������������������3
2.1 Intended use������������������������������������������������������ 3
2.2 General safety instructions ������������������������������������ 3
2.3 Test symbols ������������������������������������������������������ 3
3. Appliance description ���������������������������������������4
4. Settings �������������������������������������������������������4
4.1 Recommended tap/valve settings ���������������������������� 4
5. Cleaning, care and maintenance ���������������������������4
6. Troubleshooting ����������������������������������������������5
INSTALLATION
7. Safety����������������������������������������������������������5
7.1 General safety instructions ������������������������������������ 5
7.2 Instructions, standards and regulations �������������������� 5
8. Appliance description ���������������������������������������5
8.1 Standard delivery������������������������������������������������ 5
9. Preparation ���������������������������������������������������6
9.1 Installation location ��������������������������������������������� 6
9.2 Water installation������������������������������������������������ 6
10. Installation����������������������������������������������������7
10.1 Standard installation�������������������������������������������� 7
10.2 Alternative installation methods������������������������������ 9
10.3 Completing the installation����������������������������������� 10
11. Commissioning ��������������������������������������������� 11
11.1 Initial start-up��������������������������������������������������� 11
11.2 Recommissioning����������������������������������������������� 11
12. Appliance shutdown��������������������������������������� 11
13. Troubleshooting �������������������������������������������� 11
14. Maintenance ������������������������������������������������ 12
15. Specification ������������������������������������������������ 12
15.1 Dimensions and connections��������������������������������� 12
15.2 Wiring diagram ������������������������������������������������� 13
15.3 DHW output������������������������������������������������������ 13
15.4 Application areas/ Conversion table ����������������������� 13
15.5 Pressure drop ��������������������������������������������������� 14
15.6 Fault conditions ������������������������������������������������� 14
15.7 Energy consumption data������������������������������������� 14
15.8 Data table �������������������������������������������������������� 14
GUARANTEE
ENVIRONMENT AND RECYCLING
SPECIAL INFORMATION
- The appliance may be used by children aged3
and up and persons with reduced physical,
sensory or mental capabilities or a lack of ex-
perience 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.
- During operation, the tap can reach temper-
atures in excess of 60°C. There is a risk of
scalding at outlet temperatures in excess of
43°C.
- The appliance is not suitable for supplying a
shower (shower operation).
- Ensure the appliance can be separated from
the power supply by an isolator that discon-
nects all poles with at least 3mm contact
separation.
- The specified voltage must match the mains
voltage.
- The appliance must be connected to the earth
conductor.
- The appliance must be permanently connect-
ed to fixed wiring.
- Secure the appliance as described in chapter
"Installation/ Installation".
- Observe the maximum permissible pressure
(see chapter "Installation/ Specification/ Data
table").
- The specific water resistivity of the mains
water supply must not be undershot (see
chapter "Installation/ Specification/ Data
table").
- Drain the appliance as described in chapter
"Installation/ Maintenance/ Draining the
appliance".

OPERATION
General information
ENGLISH
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OPERATION
1. General information
The chapters "Special information" and "Operation" are intended
for both users and qualified 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.
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 General information is identified by the adjacent symbol.
 Read these texts carefully.
Symbol Meaning
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 All measurements are given in mm unless stated oth-
erwise.
2. Safety
2.1 Intended use
The appliance is intended for domestic use. It can be used safely
by untrained persons. The appliance can also be used in non-do-
mestic environments, e.g.in small businesses, as long as it is
used in the same way.
This pressure appliance is designed to heat DHW. The appliance
can supply one or more draw-off points.
Any other use beyond that described shall be deemed inappro-
priate. Observation of these instructions and of the instructions
for any accessories used is also part of the correct use of this
appliance.
Note This appliance is not approved for reheating preheated
water.
2.2 General safety instructions
CAUTION Burns During operation, the tap can reach temperatures in
excess of 60°C. There is a risk of scalding at outlet tem-
peratures 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 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
The user should protect the appliance and its tap against
frost.
2.3 Test symbols
See type plate on the appliance.
!
!

OPERATION
Appliance description
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3. Appliance description
The hydraulically controlled instantaneous water heater heats the
water as it flows through the appliance. The heating output starts
automatically as soon as a tap is opened and the starting flow rate
is exceeded (see chapter "Specification/ Data table"). The water
volume and temperature can be adjusted at the tap.
You can choose between 2 output stages. Two further output stages
are hydraulically controlled in relation to the flow rate.
The flow rate controller compensates for pressure fluctuations,
thereby ensuring largely stable temperatures. The controller limits
the throughput, thereby ensuring an adequate increase in the
DHW temperature at all times.
Heating system
The bare wire heating system has a pressure-tested plastic cas-
ing. The heating system is suitable for hard and soft water areas
and is largely insusceptible to scale build-up. This heating system
ensures rapid and efficient DHW availability.
4. Settings
D0000041612
2 1
1 Partial load
At low throughput 1/3 of the heating output is activated; at
higher throughput 2/3 of the available heating output is ena-
bled. This setting is suitable for hand washing at a basin, for
example.
2 Full load
At a low throughput, 1/2 of the heating output is applied; at
a higher throughput the full heating output is activated. This
setting is suitable for washing dishes, for example.
 Click the output selector into the required position.
Recommended settings when using a thermostatic valve
 Set the output selector to full power.
4.1 Recommended tap/valve settings
Note If the outlet temperature is not sufficiently high at full
load and with the draw-off valve fully open, then more
water is flowing through the appliance than can be heat-
ed by the heating system (appliance is at its output limit).
 Reduce the water volume at the draw-off valve.
Low draw-off rate = high outlet temperature
High draw-off rate = low outlet temperature
Twin lever tap
Output stage Application range
Partial load Washbasin
Full load Bath, sink
 Add cold water if the temperature is too high when the tap is
fully open.
Mono lever mixer
Output stage Application range
Full load All
 Turn the tap lever to the highest temperature.
 Fully open the tap.
 Increase the outlet temperature by closing the tap slowly.
 Reduce the outlet temperature by adding cold water or open-
ing the tap further, if possible.
Following an interruption to the water supply
!Material losses
Following an interruption of the water supply the appli-
ance must be recommissioned by carrying out the follow-
ing steps, in order to prevent the destruction of the bare
wire heating system.
 Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
 Open the tap for one minute until the appliance and
its upstream cold water inlet line are free of air.
 Switch the mains power back on again.
5. Cleaning, care and maintenance
 Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning the appliance.
 Check the taps regularly. Limescale deposits at the tap out-
lets can be removed using commercially available descaling
agents.

INSTALLATION
Troubleshooting
ENGLISH
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6. Troubleshooting
Problem Cause Remedy
The appliance will not
start despite the DHW
valve being fully open.
There is no power. Check the fuses/MCBs in
your fuse box/distribu-
tion board.
The flow rate is too low
for switching on the
heating output. The aer-
ator in the tap.
Clean and/or descale the
aerator.
If you cannot remedy the fault, notify your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate (000000-0000-00000):
Nr.: 000000-0000-00000
D0000041614
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 maximum inlet temperature. Higher tem-
peratures may damage the appliance. You can limit the
maximum inlet temperature by installing a central ther-
mostatic valve.
7.2 Instructions, standards and regulations
Note Observe all applicable national and regional regulations
and instructions.
- The IP 25 (hoseproof) rating can only be ensured with a cor-
rectly fitted cable grommet.
- The specific electrical resistivity of the water must not fall
below that stated on the type plate. In a linked water net-
work, observe the lowest electrical water resistivity (see
chapter "Specification/ Application areas/ Conversion
table"). Your water supply utility will advise you of the specif-
ic electrical water resistivity or conductivity.
8. Appliance description
8.1 Standard delivery
The following are delivered with the appliance:
- Wall mounting bracket
- Threaded stud for wall mounting
- Installation template
- 2 twin connectors (cold water with shut-off valve)
- Flat gaskets
- Cable grommet (power cable from above/ below)
- Screws/ rawl plugs for securing the back panel to allow for
water connection on finished walls
For appliance replacement:
- 2 tap extensions

INSTALLATION
Preparation
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9. Preparation
9.1 Installation location
!Material losses
Install the appliance in a room free from the risk of frost.
 Always install the appliance vertically and near the draw-off
point.
The appliance is suitable for undersink and oversink installation.
Undersink installation
26�02�02�1345
1
2
1 Cold water inlet
2 DHW outlet
Oversink installation
12
26�02�02�1344
1 Cold water inlet
2 DHW outlet
Note  Mount the appliance on the wall. The wall must have
sufficient load bearing capacity.
9.2 Water installation
- Never operate with preheated water.
- No safety valve is required.
- Safety valves are not permissible in the DHW pipe.
 Flush the water line thoroughly.
 Ensure that the flow rate for switching on the appliance is
achieved (see chapter "Specification/ Data table", On). In-
crease the mains water pressure if the required flow rate is
not achieved with the draw-off valve fully opened.
Taps
Use appropriate pressure taps. Open vented taps are not per-
missible.
Thermostatic pressure valves must be suitable for hydraulically
controlled instantaneous water heaters.
Note Never use the shut-off valve in the cold water inlet to
reduce the flow rate. It is intended for shutting off the
appliance.
Permissible water line materials
- Cold water inlet pipe:
Pipes made from galvanised steel, stainless steel, copper or
plastic
- DHW outlet line:
Pipes made from stainless steel, copper or plastic
!Material losses
If plastic pipework systems are used, take into account
the maximum inlet temperature and the maximum pres-
sure (see chapter "Specification/ Data table").
Flexible water connection lines
 If the appliance is installed with flexible water connection
lines, ensure that the pipe bends with bayonet fittings do not
become twisted inside the appliance.
 Secure the back panel at the bottom with two additional
screws.

INSTALLATION
Installation
ENGLISH
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10. Installation
10.1 Standard installation
- Electrical connection from above; installation on unfinished
walls
- Water connection on unfinished walls
For further installation options, see chapter "Alternative instal-
lation methods":
- Electrical connection from below on unfinished walls
- Electrical connection on finished walls
- Connecting a load shedding relay
- Water installation on finished walls
- Water connection on unfinished walls for appliance
replacement
Opening the appliance
D0000041615
 Open the appliance by releasing the snap lock.
NT
T-
so
X1
26�02�02�0762
 Remove the back panel by pressing the two locking tabs and
pulling the lower section of the back panel forwards.
Preparing the power cable
160
≥ 30
26�02�02�0887
Fitting the wall mounting bracket
26�02�02�0972
 Mark out the holes for drilling using the installation tem-
plate. If the appliance is to be installed with water connec-
tions on finished walls, also mark out the fixing holes in the
lower part of the template.
 Drill the holes and secure the wall mounting bracket with
2screws and 2rawl plugs (screws and rawl plugs are not
part of the standard delivery).
 Fit the threaded stud provided.
 Fit the wall mounting bracket.
Fitting the cable grommet
26�02�02�0950
 Fit the cable grommet. For connecting cables >6mm², en-
large the hole in the cable grommet.

INSTALLATION
Installation
8| PHB www.stiebel-eltron.com
Making the water connection
!Material losses
Carry out all water connection and installation work in
accordance with regulations.
26�02�02�0948
 Seal and insert the twin connectors.
!Material losses
Never use the shut-off valve in the cold water inlet to
reduce the flow rate.
Preparing the back panel
!Material losses
If you break open the wrong knock-out in the back panel
by mistake, you must use a new back panel.
D0000041896
 Break out the cable grommet knock-out in the back panel.
Deburr any sharp edges with a file if necessary.
Installing the appliance
D0000041897
 Push the back panel over the threaded stud and the cable
grommet. Pull the cable grommet by the locking hooks into
the back panel using pliers, until both locking hooks audibly
click into place.
 Remove the protective transport plugs from the water
connections.
 Press the back panel firmly into place and lock the fixing tog-
gle by turning it clockwise through 90°.
D0000041925
 Screw the water connection pipes with flat gaskets onto the
twin connectors.
!Material losses
The strainer must be fitted for the appliance to function.
 When replacing an appliance, check whether the
strainer is installed (see chapter "Maintenance").

INSTALLATION
Installation
ENGLISH
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Making the electrical connection
WARNING Electrocution Carry out all electrical connection and installation work
in accordance with relevant regulations.
WARNING Electrocution The connection to the power supply must be in the form
of a permanent connection in conjunction with the re-
movable cable grommet. Ensure the appliance can be
separated from the power supply by an isolator that dis-
connects all poles with at least 3mm contact separation.
WARNING Electrocution Ensure that the appliance is earthed.
!Material losses
Observe the type plate. The specified voltage must match
the mains voltage.
 Connect the power cable to the mains terminal (see chapter
"Specification/ Wiring diagram").
Fitting the base part of the back panel
3
L3’
4
L2’
1
L1’
2
LLL
NT C
T- sol l
X11
26�02�02�1348
 Position the lower back panel on the main back panel and
click it into place.
 Align the mounted appliance by undoing the fixing toggle,
aligning the power supply and back panel, and then re-tight-
ening the fixing toggle. If the back panel is not flush with the
wall, the appliance can be secured at the bottom with two
additional screws.
10.2 Alternative installation methods
10.2.1 Electrical connection from below on unfinished walls
D0000041898
 Fit the cable grommet.
!Material losses
If you break open the wrong knock-out in the back panel
by mistake, you must use a new back panel.
 Break out the cable grommet knock-out in the back panel.
Deburr any sharp edges with a file if necessary.
 Reposition the mains terminal in the appliance from the top
to the bottom.
 Push the back panel over the threaded stud and the cable
grommet. Pull the cable grommet by the locking hooks into
the back panel using pliers, until both locking hooks audibly
click into place.
 Press the back panel firmly into place and lock the fixing tog-
gle by turning it clockwise through 90°.

INSTALLATION
Installation
10 | PHB www.stiebel-eltron.com
10.2.2 Electrical connection on finished walls
Note This type of connection changes the IP rating of the ap-
pliance.
 Change the type plate. Cross out "IP 25" and mark
the box "IP 24". Use a ballpoint pen to do this.
!Material losses
If you break open the wrong knock-out in the back panel
by mistake, you must use a new back panel.
 Cleanly cut or break out the required cable entries in the
back panel (for positions, see chapter "Specification/ Dimen-
sions and connections"). Deburr any sharp edges with a file if
necessary.
 Route the power cable through the cable grommet and con-
nect it to the mains terminal.
10.2.3 Connecting a load shedding relay
When operating additional electric appliances, such as electric
storage heaters, install a load shedding relay in the distribution
board. The relay responds when the instantaneous water heater
starts.
!Material losses
Connect the phase that switches the load shedding relay
to the indicated terminal of the mains terminal in the
appliance (see chapter "Specification/ Wiring diagram").
10.2.4 Water installation on finished walls
Note This type of connection changes the IP rating of the ap-
pliance.
 Change the type plate. Cross out "IP 25" and mark
the box "IP 24". Use a ballpoint pen to do this.
26�02�02�0765
 Fit water plugs with gaskets to seal the concealed
connections.
 Fit a suitable pressure tap.
26�02�02�1006
 Click the lower section of the back panel into place in the
upper section of the back panel.
 Secure the connection pipes to the appliance.
 Secure the back panel at the bottom with two additional
screws.
 Cleanly break out the knock-outs in the appliance cover. De-
burr any sharp edges with a file if necessary.
 Slide the lower back panel under the connection pipes of the
tap and click the lower back panel into place.
 Secure the connection pipes to the appliance.
10.2.5 Water installation on unfinished walls for appliance
replacement
If the existing twin connectors of the old appliance only protrude
from the wall by approx.16mm, you cannot use the twin con-
nectors provided.
Note With this connection, the cold water supply can only be
shut off within the domestic installation.
16
D0000041634
 Seal and fit the screw-in tap extensions provided.
 Connect the appliance.
10.3 Completing the installation
 Open the shut-off valve in the twin connector or the cold
water inlet line.