en Installation Manual and Operating Instructions
Gas Heaters
GWH 10-2 G.. / GWH 13-2 G.. / GWH 16-2 G..
6 720 608 992 (2011/12) AU
Read installation manual prior to installation of this unit!
Read user manual before putting this unit in operation!
Observe the warnings in the manuals!
The installation room must fulfill the ventilation requirements!
Installation by an authorised person only!
2 | Table of contents
6 720 608 992 (2011/12)
Table of contents
1 Key to symbols and safety instructions . . . . . . . 3
1.1 Explanation of symbols . . . . . . . . . . . . . . . . 3
1.2 Safety information . . . . . . . . . . . . . . . . . . . 3
2 Technical Characteristics and Dimensions . . . . . 4
2.1 General Description . . . . . . . . . . . . . . . . . . 4
2.2 Explanation of Model Code . . . . . . . . . . . . . 4
2.3 Package contents . . . . . . . . . . . . . . . . . . . . 4
2.4 Description of the heater . . . . . . . . . . . . . . 4
2.5 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.6 Functional diagram of the heater . . . . . . . . 6
2.7 Electrical diagram . . . . . . . . . . . . . . . . . . . . 7
2.8 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.9 Technical characteristics . . . . . . . . . . . . . . 8
3 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1 Important information . . . . . . . . . . . . . . . 10
4.2 Selection of the place of installation . . . . 10
4.3 Heater mounting . . . . . . . . . . . . . . . . . . . . 11
4.4 Water connection . . . . . . . . . . . . . . . . . . . 11
4.5 Hydrogenerator operation . . . . . . . . . . . . 11
4.6 Pressure Relief . . . . . . . . . . . . . . . . . . . . . 12
4.7 Gas connection . . . . . . . . . . . . . . . . . . . . . 12
4.8 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Operating instructions . . . . . . . . . . . . . . . . . . . . 13
5.1 Digital display - description . . . . . . . . . . . 13
5.2 Before starting up the heater . . . . . . . . . . 13
5.3 Turning the heater on and off . . . . . . . . . . 13
5.4 Water flow . . . . . . . . . . . . . . . . . . . . . . . . 13
5.5 Gas adjustment . . . . . . . . . . . . . . . . . . . . . 14
5.6 Temperature/flow adjustment . . . . . . . . . 14
5.7 Draining the appliance . . . . . . . . . . . . . . . 14
6 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1 Inlet pressure adjustment . . . . . . . . . . . . . 15
6.2 Burner pressure adjustment . . . . . . . . . . . 15
6.3 Conversion to a different type of gas . . . . 15
7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.1 Flue gas safety device . . . . . . . . . . . . . . . . 16
8 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.1 Problem/cause/solution . . . . . . . . . . . . . . 17
9 Environmental protection . . . . . . . . . . . . . . . . . 19
10 Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . 20
11 Warranty details . . . . . . . . . . . . . . . . . . . . . . . . 21
Key to symbols and safety instructions | 3
6 720 608 992 (2011/12)
1 Key to symbols and safety instructions
1.1 Explanation of symbols
Warnings
Keywords indicate the seriousness of the hazard in
terms of the consequences of not following the safety
instructions.
• NOTICE indicates that material damage may occur.
• CAUTION indicates that minor to medium injury may
occur.
• WARNING indicates that serious injury may occur.
• DANGER indicates possible risk to life.
Important information
Additional symbols
1.2 Safety information
If you smell gas:
B Close the gas supply valve.
B Open the windows.
B Do not operate any electrical appliances or switches
(on/off).
B Extinguish other sources of ignition.
B Go to a different location and call the gas supplier or
an authorised technician.
If you smell combustion gases:
B Turn off the heater.
B Open doors and windows.
B Notify an authorised technician.
Assembly, modifications
B The assembly and modifications to the heater can
only be performed by an authorised installer.
B Do not modify the pipes which conduct combustion
gases.
B Do not close or reduce air circulation vents.
Maintenance
B We recommend the system be serviced regularly to
ensure it functions reliably and safely.
B The installer is responsible for the safety and
environmental compatibility of the installation.
B The heater should be serviced annually.
B Only original spare parts must be used.
Explosive and highly inflammable material
B Do not store or use inflammable material (paper,
solvents, paints, etc) near the heater.
Combustion air and surrounding air
B To avoid corrosion, the combustion air and
surrounding air must be free from harmful substances
(e.g. halogenated hydrocarbons which contain
chlorine and fluorine compounds).
B Do not spray pressure pack or use chemicals around
the heater
Information to the customer
B Inform the customer about how to operate the heater.
B This appliance is not intended for use by persons
(including children) with reduced physical sensory or
mental capabilities.
Children should be supervised to ensure they do not
play with the appliance.
B Caution customers against performing modifications
or repairs themselves.
To be installed and serviced only by an authorised
person
The “authorised installing person” is responsible for:
B Correct commissioning of this appliance.
B Ensuring the appliance performs to the specifications
stated on the rating label.
B Demonstrating the operation of the appliance to the
customer before leaving.
B Handing these instructions to customer.
THIS APPLIANCE IS NOT FOR USE AS A POOL OR SPA
POOL HEATER.
THIS APPLIANCE IS ONLY TO BE INSTALLED INDOORS.
Warnings in this document are framed and
identified by a warning triangle which is
printed on a grey background.
Electrical hazards are identified by a
lightning symbol surrounded by a warning
triangle.
Important information in cases where there
is no risk of personal injury or material
losses is identified by the symbol shown on
the left. It is bordered by horizontal lines
above and below the text.
Symbol Meaning
B a step in an action sequence
Æ a reference to a related part in the
document or to other related documents
• a list entry
– a list entry (second level)
Table 1
4 | Technical Characteristics and Dimensions
6 720 608 992 (2011/12)
2 Technical Characteristics and Dimensions
2.1 General Description
2.2 Explanation of Model Code
2.3 Package contents
• Gas heater
• Fixing Brackets
• flexible water pipes
• Gas regulator
• Heater documentation
2.4 Description of the heater
Designed for convenience, the heater is ready to operate
by simply pressing a switch.
• Heater for wall-mounting
• Ignition by electronic device triggered when the water
valve opens
• Hydrodynamic generator produces sufficient energy
to ignite and control the heater.
• Gauge to display temperature, burner operation and
error codes
• Temperature sensor to monitor the water
temperature at the heater outlet
• Available in Natural gas or LP gas
• Temporary pilot burner which only functions during
the period between the opening of the water valve
and the ignition of the main burner
• Water valve made of fibreglass-reinforced polyamide,
and is 100% recyclable
• Automatic control of the water flow to allow for
variable water supply pressure.
• Gas flow adjustment proportional to the water flow to
maintain a constant temperature.
• Safety devices:
– Ionisation probe to check for accidental extinction
of the burner flame
– Flue gas safety device which turns off the heater in
cases where the evacuation of flue gases is
inadequate
– Overtemperature switch which prevents
overheating of the heat exchanger.
Model GWH 10/13/16 -2 G..
Category CONTINUOUS FLOW
Type INTERNAL
Table 2
Type l/min Series Ignition Gas Types
GWH 10 2GNG / LP gas
GWH 13 2GNG / LP gas
GWH 16 2GNG / LP gas
Table 3
Technical Characteristics and Dimensions | 5
6 720 608 992 (2011/12)
2.5 Dimensions
Fig. 1
1 Front cover
2 Opening in rear panel for mounting on the wall
3 Temperature/volume selector
4 Gas adjustment
5 Digital display
6 Switch/LED - Low water pressure indicator
7 LED - Burner status check
8 Gas connection
9 Connection collar for flue
10 Draught diverter
11 Copper Heat exchanger
12 Burner
13 Gas valve
14 Ignition unit
Dimensions
(mm)
A B C D E F G
H (Ø)
Natural gas LP gas
GWH10... 310 580 228 115 463 60 25 20 15
GWH13... 350 655 228 140 510 95 30 20 15
GWH16... 425 655 334 140 540 65 30 20 15
Table 4 Dimensions
6 | Technical Characteristics and Dimensions
6 720 608 992 (2011/12)
2.6 Functional diagram of the heater
Fig. 2 Functional diagram
1 Pilot burner
2 Ignition Electrode
3 Ionisation probe
4 Heat exchanger
5 Main burner
6 Injector
7a Burner pressure test point
7b Gas inlet pressure test point
8 Slow ignition valve
9 Venturi
10 Temperature/volume selector
11 Water valve
12 Plunger
13 Water flow regulator
14 Water filter
15 Hydrogenerator
16 Cold water pipe
17 Diaphragm
18 Main gas valve
19 Maximum gas adjusting screw
20 Gas supply pipe
21 Gas filter
22 Hot water pipe
23 Ignition unit
24 Temperature sensor
25 Servo valve
26 Power selector
27 Gas valve
28 Pilot valve
29 Pilot injector
30 Pilot gas pipe
31 Overtemperature switch
32 Flue gas safety device
33 Relief Valve/Drain screw
12
3
4
5
6
8
9
10
15
7a
11
12
13
14
16
171819207b21
23
22
25
24
26
27
28
29
30
31
32
33
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Technical Characteristics and Dimensions | 7
6 720 608 992 (2011/12)
2.7 Electrical diagram
Fig. 3 Electrical diagram
1 Ignition electrode
2 Ignition unit
3 Switch/LED - Low water pressure indicator
4 Digital display
5 Ionisation probe
6 Flue gas safety device
7 Overtemperature switch
8 Temperature sensor
9 Pilot solenoid (Normally Closed)
10 Diaphragm valve
11 Main Solenoid (Normally Open)
12 Hydrogenerator
13 LED - Burner status check
2.8 Function
This gas heater is equipped with automatic electronic
ignition to simplify operation.
B To activate, just turn on the switch (Fig. 8).
After this, automatic ignition occurs whenever a hot
water tap is opened. First, the pilot burner is lit and
approximately four seconds later the main burner
ignites. The pilot burner flame is extinguished after the
main burner lights.
This is a way of saving a great amount of energy as the
pilot burner only operates for the minimum necessary
time to ignite the main burner.
8 | Technical Characteristics and Dimensions
6 720 608 992 (2011/12)
2.9 Technical characteristics
Technical characteristics Units GWH10 GWH13 GWH16
Gas Consumption
Nominal Gas Consumption MJ 79
100 (NG)
127
97 (LP gas)
Supply pressure
Natural gas H kPa 1.13 1.13 1.13
LP gas kPa 2.75 2.75 2.75
Number of injectors 12 14 18
Water data
Maximum permissible pressure kPa 1000 1000 1000
Temperature selector in fully clockwise position
Temperature rise °C 50 50 50
Flow range l/min 2.2 - 4.6 2.2 - 6.2 2.2 - 8.6
Minimum operating pressure kPa 35 35 50
Minimum pressure for maximum flow kPa 50 60 80
Temperature selector in fully anti-clockwise position
Temperature rise °C 25 25 25
Flow range l/min 4 - 10 4 - 13 4 - 15
Minimum operating pressure kPa 45 45 50
Minimum pressure for maximum flow kPa 100 140 170
Table 5
Regulations | 9
6 720 608 992 (2011/12)
3Regulations
Any local by-laws and regulations pertaining to
installation and use of gas-heated appliances must be
observed.
This appliance must be installed in accordance with the
manufacturers installation instructions, AS5601,
NZ5261 and all Local Building & Gas fitting regulations
It is recommended that for sanitary fixtures used for the
purpose of personal hygiene, that a temperature
limitingl device be fitted (such as a tempering valve) as
per AS3498.
This appliance must not be installed in a bedroom,
bathroom, toilet, or combined living/sleeping room as
per AS5601 5.12.5.2
Failure to install this appliance in accordance with these
installation instructions will void the warranty.
10 | Installation
6 720 608 992 (2011/12)
4 Installation
4.1 Important information
B Install in accordance with AS5601, AS/NZS3500.4.2,
NZS5261 and all local building, water and gas fitting
regulations particularly with regard to ventilation
requirements.
B Install gas and water isolation valves as close as
possible to the heater.
B After finishing the gas piping system, the pipes must
be thoroughly purged and leak-tested. To avoid
damaging the gas valve by excess pressure, this test
must be performed with the gas valve of the heater
closed.
B Check if the heater corresponds to the type of gas
provided.
B Ensure the flow and pressure through the regulator
are appropriate for the consumption of the heater
(see technical data in the table 5).
4.2 Selection of the place of installation
Requirements regarding the place of installation
• Comply with the specific instructions for each State.
• Install the gas heater in a well-ventilated location
where it will not be exposed to temperatures below
zero. Ensure combustion gases are flued to outside
atmosphere in accordance with AS5601.
• To avoid corrosion, the combustion air must be free
from harmful substances. Examples of particularly
corrosive substances: halogenated hydrocarbons
contained in solvents, paints, glues, hairsprays and
various domestic detergents. If necessary, take
adequate measures.
• Install the appliance in accordance with the minimum
installation clearances indicated in Fig. 4.
• The gas heater must not be installed over a heat
source.
• Do not obstruct the openings at top and bottom of
appliance.
• Top and bottom areas must be clear from any
obstacles at least 30 cm.
In case of a frost risk:
B Turn off the heater.
B Drain the heater (see section 5.7)
Fig. 4 Minimum clearances
DANGER:
This appliance must not be installed in a
bedroom, bathroom, toilet or combined
living/sleeping room in accordance with
AS5601.
DANGER: Explosion Risk
B Always turn off the gas cock before
carrying out any work on components
which carry gas.
The gas installation, connection of the flue
and supply pipes, as well as the initial
startup are to be performed exclusively by
an authorised person.
This appliance should only be installed in
applications where cold water temperature
does not exceed 40 °C.
The use of these heaters with water supply
pressure values below 50 kPa is not
recommended. This appliance requires a
minimum flow rate of 2.5lpm to operate.
Water fixtures with a flow rate of 6lpm for
hand basins and 8.5lpm for shower roses
are recommended.
Installation in a marine environment should
be avoided.
Not suitable for pool, spa pool or solar
application.
3
40
³
6720608992-01.1Av
180
£
140
³
100
³
30
3 3
³
30
Installation | 11
6 720 608 992 (2011/12)
Combustion gases
If any of these conditions cannot be met, a different
location must be selected.
Surface temperature
The maximum surface temperature of the heater is less
than 85 °C, with the exception of the flue piping. No
special protection measures are required for flammable
construction materials or built-in furniture items.
Air intake
The place where the heater is to be installed must have
an adequate air supply as per AS5601.
4.3 Heater mounting
B Remove the temperature/flow selector and the gas
selector knobs.
B Unscrew the cover fixing screws.
B With a simultaneous movement forwards and
upwards, release the cover from the two lugs at the
back.
B Fix the heater vertically, using the provided screw
hooks and plugs or use fixings appropriate for the
material & weight.
4.4 Water connection
It is advisable to purge the water pipes before
connection, because the presence of dirt may reduce the
flow and, in extreme cases, cause a blockage.
B Identify the cold water pipe (Fig. 5, item A) and the
hot water pipe (Fig. 5, item B), so as to avoid any
possible cross-connection.
B Connect the water pipes to the water valve using the
connection accessories provided.
Fig. 5 Water connection
4.5 Hydrogenerator operation
The hydrogenerator (hydrodynamic generator or HDG) is
located in the water circuit between the water valve and
the heat exchanger. This component has a turbine that
rotates when water flows past its blades. This
movement is transmitted to an electric generator which
powers the heater ignition unit.
The electrical voltage value supplied by the HDG is
approximately 3.0 VAC.
Ventilation requirements as per AS5601.
Use single or twin skin flue in accordance
with AS5601.
DANGER: Make sure that all flue
connections are sealed.
B Fit the flue pipe with an approved flue
cowl.
B Failure to follow this requirement may
cause dangerous exhaust gases to enter
living space which may result in personal
injury or loss of life.
DANGER:
Every part of the flue system must be in the
vertical plane.
CAUTION:
Ensure that the flue is installed to the
requirements of AS5601, including the
requirement to terminate the flue above the
roof level.
CAUTION:
Never support the gas heater on the water
or gas connections.
CAUTION:
If fitting an isolating valve to the water inlet
line it must be a Gate or Ball Valve, a Stop
Cock or Non-Return Valve must not be
fitted.
B
A
6720608992-03.1Av
12 | Installation
6 720 608 992 (2011/12)
4.6 Pressure Relief
The pressure relief (Fig. 2, pos. 33) will release pressure
from the system whenever the value exceeds 1500 kPa.
4.7 Gas connection
Gas regulator
The appliance is supplied with a gas pressure regulator
that must be installed on the heater before attaching the
gas supply line (see Fig. 6).
B Use sealing tape to assure the complete tightness of
the installation.
Fig. 6 Gas regulator
4.8 Testing
B Turn on the gas and water cocks and check all
connections for leaks. If all connections are sound
then follow procedures set out in Section 6 for
adjustment of Gas Pressures.
DANGER:
If local regulations are not followed, a fire or
explosion could result causing property
damage, personal injury, or loss of life.
Size gas supply as per AS5601.
Incorrect gas pipe sizing will not be covered
by the warranty.
6720608992-02.1JS
Operating instructions | 13
6 720 608 992 (2011/12)
5 Operating instructions
5.1 Digital display - description
Fig. 7 Digital display
1 Temperature/error code
2 Malfunction indicator
3 Temperature measurement units
4 Heater in operation (burner turned on)
5.2 Before starting up the heater
B Check if the gas indicated on the rating plate is the
same as the one used at the location.
B Open the gas valve.
B Open the water valve.
5.3 Turning the heater on and off
Turning on
B Press the switch , position .
Fig. 8
Turn Hot Tap on, LED light on = Main burner on
Fig. 9
Turning off
B Press the switch , position .
5.4 Water flow
If the red LED starts flashing during operation, check the
water flow.
Fig. 10
Open all water and gas isolation valves.
Purge the pipes.
CAUTION:
The front stainless steel panel in the burner
and pilot burner area may reach high
temperatures, with risk of burning in case of
contact, and must not be removed.
CAUTION:
B Initial startup must be performed by an
authorised gas fitter who will provide the
customer with all the necessary
information for optimum operation of the
gas heater.
14 | Operating instructions
6 720 608 992 (2011/12)
5.5 Gas adjustment
Lower water temperature.
Use less gas.
Fig. 11
Higher water temperature.
Use more gas.
Fig. 12
5.6 Temperature/flow adjustment
B Turn anti-clockwise
Increases flow and decreases water temperature.
Fig. 13
B Turn clockwise.
Decreases flow and increases water temperature.
Regulating the temperature to the minimum required
value reduces energy consumption.
5.7 Draining the appliance
There are two ways to drain the appliance if there is a
risk of freezing.
After turning off the inlet water valve and gas supply,
open a hot water tap to relieve pressure then proceed as
follows:
Water valve draining (see fig 14)
B Remove the fixing lock from the filter screw cap (no.
1) situated in the water valve.
B Remove the filter screw cap (no. 2) from the water
valve.
B Empty all the water contained in the heater.
Fig. 14 Draining
1 Lock
2 Filter screw cap
3 Water valve
Cold water inlet pipe drain (see fig 15)
B Remove the pressure relief screw (no. 1) situated in
the water inlet pipe.
B Drain all the water contained in the heater.
Fig. 15 Draining
1 pressure relief screw
CAUTION:
The temperature on the display is not
precise, always check before bathing
children or elderly people.
6720680033-02.1Av
2
1
3
1
6720608992-04.1Av
Commissioning | 15
6 720 608 992 (2011/12)
6 Commissioning
6.1 Inlet pressure adjustment
Burner pressures have been adjusted in the factory,
however adjustment may be required upon installation.
Attach a manometer to the inlet pressure test point
located on the gas inlet pipe.
Inlet gas pressure should be adjusted at the appliance
regulator to 1.13 kPa for Natural Gas and 2.75 kPa for LP
gas.
These measurements must be set while the unit is
operating.
6.2 Burner pressure adjustment
Accessing the adjusting screw
B Remove the front cover from the heater (see 4.3).
Connecting the manometer
B loosen the burner test point captive screw (Fig. 16).
B Connect the manometer to the burner pressure
measuring point.
Fig. 16 Pressure measurement point
Maximum gas flow adjustment
B Remove the seal from the adjusting screw (Fig. 17).
B Turn on the heater with the gas selector set to the left
(maximum position).
Fig. 17 Maximum gas flow adjusting screw
B Open various hot water taps.
B Using the adjusting screw (Fig. 17), regulate the gas
pressure until the values indicated in the table 6 are
achieved.
B Seal the adjusting screw once again.
Minimum gas flow adjustment
6.3 Conversion to a different type of gas
Only use original conversion parts.
The conversion must only be performed by a qualified
technician. Original conversion kits are supplied with
assembly instructions.
DANGER:
The following procedures must only be
performed by a qualified technician.
6720607418-01.3V
The minimum gas flow adjustment is
performed automatically after the
adjustment of the maximum gas flow.
Natural gas H LP gas
MAX Burner
Pressure
(kPa)
GWH10 0.69 2.00
GWH13
0.66 1.90
GWH16
0.44 2.20
Table 6 Burner pressure
6720607418-02.2V
16 | Maintenance
6 720 608 992 (2011/12)
7 Maintenance
To ensure that gas consumption and the environmental
load (pollution, etc.) remain as negligible as possible
over time, we recommend the appliance be maintained
on an annual basis.
These jobs can only be done by a Bosch authorised
service agent.
7.1 Flue gas safety device
Operation and precautions
This probe verifies the condition of flue gas evacuation
and, in case of malfunction, it automatically turns off the
heater. This prevents combustion gases from entering
the room where the gas heater has been installed. The
probe restarts after a reset period.
If the heater turns off during operation:
B Ventilate the room.
B After 10 minutes, turn on the heater once again.
Call a qualified technician if the same thing happens
again.
Maintenance*
If the probe malfunctions, proceed as follows:
B Unscrew the probe fixing screw.
B Detach the ignition unit terminal.
B Replace the faulty part and re-assemble in reverse
order.
Operating check*
To check the correct operation of the flue gas safety
device, proceed as follows:
B Remove the combustion gases flue pipe.
B temporarily replace it with a pipe (approximately 50
cm long) blocked at one end.
B The pipe must be installed vertically.
B Turn on the heater at nominal power and with the
temperature selector adjusted to maximum
temperature.
In these conditions, the heater must turn off no more
than two minutes afterwards, at most. Remove the
pipe and replace the flue pipe.
* These procedures must be performed by a qualified
installer/service agent.
DANGER:
Failure to perform maintenance procedures
can lead to appliance malfunction, errors,
service calls and loss of warranty.
Maintenance must only be performed by a
qualified technician. Maintenance
information is contained in a service manual
available to licenced technicians upon
request from Bosch.
DANGER:
The probe must never be turned off,
modified or replaced with a different part
under any circumstances.
DANGER:
The user must never touch the flue gas
safety device.
Problems | 17
6 720 608 992 (2011/12)
8Problems
8.1 Problem/cause/solution
Assembly, maintenance and repairs must be performed
by qualified technicians only. The following chart offers
solutions to possible problems.
Problem Cause Solution
The heater does not ignite and
digital display is turned off.
Slow and difficult ignition of the
burner.
Red LED in switch flashes.
Switch turned off.
Reduced water flow.
Reduced water flow.
Check switch position.
Call a qualified technician.
Call a qualified technician.
Water at low temperature. Check the temperature selector position
and adjust it according to the desired
water temperature.
Water is not heated, no flame. Insufficient gas supply. Gas
Cylinders may be empty
If sufficient gas appears to be available
call a qualified technician.
Digital display shows “E9”.
Digital display shows “A4”.
Temperature limiter has tripped
Flue gas safety device has tripped
Wait 10 minutes and restart the heater.
If the problem persists, call a qualified
technician.
Vent the area. Wait 10 minutes and
restart the heater. If the problem
persists, call a qualified technician.
Incorrect temperature
information in the appliance
digital display.
Insuficient contact of the
temperature sensor.
Call a qualified technician.
Digital display shows “E1”. Water temperature sensor has
tripped (outlet water temperature
above 85 °C).
Reduce the water temperature using the
gas and/or temperature adjustment
selector. If the problem persists, call a
qualified technician.
Digital display shows “A7”. Temperature sensor incorrectly
connected.
Temperature sensor defective.
Call a qualified technician.
Call a qualified technician.
Digital display shows “F7” or
“E0”.
Blocked Heater. Turn the heater off and on, if the
problem persists, call a qualified
technician.
Table 7
18 | Problems
6 720 608 992 (2011/12)
Digital display shows “EA”. There is spark but the main burner
does not ignite, heater blocked.No
ionisation probe signal .
Check:
• Gas supply, position of valves, empty
LP gas cylinders.
Digital display shows “F0”. Power was activated with a hot
water tap running.
Turn the water off and on. If the problem
persists, call a qualified technician.
Reduced water flow. Insufficient water supply pressure.
Dirty taps or mixers.
Gas valve blocked.
Heat exchanger blocked
(limescale).
Call a qualified technician.
Call a qualified technician
Call a qualified technician
Call a qualified technician
Problem Cause Solution
Table 7
Environmental protection | 19
6 720 608 992 (2011/12)
9 Environmental protection
Environmental protection is a basic company strategy of
Bosch. The quality of our products, profitability and
environmental protection are equal-ranking goals for us.
Laws and regulations concerning environmental
protection are strictly observed. We use the best
possible technology and materials, under economic
considerations, to protect the environment.
Packaging
We participate in the recycling program of the respective
country to ensure optimal recycling. All of our packaging
materials are environmental-friendly and can be
recycled.
Old appliances
Old appliances contain valuable materials that should be
recycled. The assemblies can be easily detached and
synthetic materials are marked accordingly. The
assemblies can therefore be sorted out and passed on
for recycling or disposal.
20 | Water quality
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10 Water quality
All Bosch water heating appliances are constructed from
high quality materials and components and all are
certified for compliance with relevant parts of Australian
and New Zealand gas, electrical and water standards.
Whilst Bosch water heaters are warranted against
defects, the warranty is conditional upon correct
installation and use, in accordance with detailed
instructions provided with the heater. In the case of the
water supplied to the heater, it is important that the
water quality be of acceptable standard.
The water quality limits/parameters listed in water
quality table are considered acceptable and generally,
Australian and New Zealand suburban water supplies fall
within these limits/parameters.
In areas of Australia and New Zealand where water may
be supplied, either fully or partly, from bores, artesian
wells or similar, one or more of the important limits may
well be exceeded and the heater could, therefore, be at
risk of failure.
Where uncertainty exists concerning water quality,
intending appliance users should seek a water analysis
from the water supplying authority and in cases where it
is established that the water supply does not meet the
quality requirements of the water quality table, the
Bosch warranty would not apply.
Water quality table
Maximum levels
pH
Saturation
Index(LSI)
(langelier)
Total
Hardness
Chlorides
Sodium
Iron
6.5-9.0 +0.4 to -1.0
at 65 °C
200
mg/l
250
mg/l
180
mg/l
1
mg/l
Table 8
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11 Warranty details
Robert Bosch (Australia) Pty Ltd
(Bosch) Manufacturer's Warranty
(Applicable for purchases from 1 January 2012)
All Bosch hot water units are carefully checked, tested and subject to stringent quality controls.
1. Warranty
Bosch offers, at its option, to repair or exchange this Bosch hot water unit or the relevant part listed in clause 2 below
at no charge, if it becomes faulty or defective in manufacture or materials during the warranty period also stated in
clause 2. This warranty is offered in addition to any other rights or remedies held by a consumer at law.
2. Warranty periods & coverage
(a) Domestic applications: 2 years (parts and labour)
(b) Heat exchangers used in domestic applications: 10 years (parts only)
(c) Commercial applications: 12 months (parts and labour)
(d) Heat exchangers used in commercial applications: 12 months (part only)
All warranty periods commence on the date of purchase of the hot water unit by the end-user. However, where the
date of purchase by the end-user is more than 24 months after the date of manufacture, all warranty periods will
automatically commence 24 months after the date of manufacture.
3. Warranty exclusions
This warranty is VOID if any damage to or failure of the hot water unit is caused wholly or partly by:
(a) faulty installation
(b) neglect, misuse, accidental or non-accidental damage, failure to follow instructions
(c) use of the unit for purposes other than which it was designed or approved
(d) unauthorised repairs or alterations to the unit without Bosch's consent
(e) use of unauthorised parts and accessories without Bosch's consent
(f) use of non-potable water or bore water in the hot water unit (see product instructions for further details)
(g) continued use after a fault becomes known or apparent.
This warranty DOES NOT include:
(a) costs of consumables or accessories
(b) wear and tear, normal or scheduled maintenance
(c) to the extent permitted by law, any damage to property, personal injury, direct or indirect loss, consequential
losses or other expenses
(d) changes in the condition or operational qualities of the hot water unit due to incorrect storage or mounting or
due to climatic, environmental or other influences.
NOTE: Any service call costs incurred by the owner or user of the hot water unit for any matter not covered by the
terms of this warranty will not be reimbursed by Bosch, even if those costs are incurred during the warranty period.
If the hot water unit is located outside the usual operating area of a Bosch service agent, the agent's travel, freight or
similar costs are not covered by this warranty and must be paid by the owner or user of the hot water unit.
4. Warranty conditions
(a) Proof of purchase may be required.
(b) The hot water unit must be installed by an authorised and licensed installer.
(c) Proof may be required of the date of installation and correct commissioning of the hot water unit has been
carried out to Bosch's satisfaction (such as a certificate of compliance).
(d) Repair or replacement of the hot water unit or any parts under this warranty does not lengthen or renew the
warranty period.
(e) This warranty is not transferable and is only offered to the original purchaser of the hot water unit.
(f) No employee or agent of Bosch is authorised to amend the terms of this warranty.
(g) This warranty only applies to Bosch hot water units purchased from an authorised reseller and installed in
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Australia or New Zealand.
(g) To the extent that any condition or warranty implied by law is excludable, such condition or warranty is
excluded.
5. How to lodge a warranty claim and warranty procedure
(a) Warranty claims must be made with the Bosch Customer Contact Centre (Australia: ph 1300 307 037; New
Zealand: ph 0800 543 352). Please be ready to provide the model and serial numbers, date of installation, purchase
details and a full description of the problem. Warranty claims must be made before the end of the warranty period.
(b) All warranty service calls must conducted by an authorised Bosch service agent.
(c) Invoices for attendance and repair of a hot water unit by third parties not authorised by Bosch will not be
accepted for payment by Bosch.
6. Privacy Act 1988 (Cth)
A customer's personal information collected during warranty claims may be used for the provision of customer
support, for the provision of information about products and services and for other marketing activities undertaken by
Bosch and its Bosch Service Agents who are authorised to carry out warranty repairs on behalf of Bosch (Purpose).
Bosch is committed to protecting the privacy of its customers' personal information. It will act in compliance with the
National Privacy Principles and Privacy Act 1988 (Cth). Bosch will not forward customers' personal information to third
parties other than for the Purpose. A customer can object at any time to the use of their personal information for the
Purpose. Bosch will cease to use a customer's personal information accordingly if an objection is made.
7. Bosch contact details
If you have any questions about this warranty or to lodge a warranty claim, please contact:
Robert Bosch (Australia) Pty Ltd
1555 Centre Road, Clayton, Victoria 3168
Tel: Australia: 1300 307 037
Tel: New Zealand: 0800 543 352
IMPORTANT NOTE FOR AUSTRALIAN CONSUMERS
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a
replacement or refund for a major failure and for compensation for any other reasonably foreseeable loss or damage.
You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure
does not amount to a major failure.
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Notes
Australia
Robert Bosch (Australia) Pty Ltd
1555 Centre Rd
Clayton, VIC 3168
Phone 1300 30 70 37
Fax 1300 30 70 38
www.bosch.com.au/hotwater
New Zealand
Phone 0800 4 Bosch or 08 543 352
www.bosch.co.nz
6720608992
