Bosch HydroPower TF250-8G(10H) Technical Document

Installation Manual and Operating Instructions
Continuous Flow Gas Water Heaters (External Models)
HydroPower
TF250-8G(10H)/ TF325-8G(13H)/ TF400-8G(16H)
8 716 473 071 (2015/04) 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!

8 716 473 071 (2015/04) HydroPower
2 | Table of contents
Table of contents
1 Safety information and symbols . . . . . . . . . . . . . . . . 3
1.1 Key to 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 Product overview . . . . . . . . . . . . . . . . . . . . . 4
2.5 Description of the Hot Water Unit . . . . . . . . 4
2.6 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.7 Electrical scheme . . . . . . . . . . . . . . . . . . . . . 7
2.8 Technical characteristics . . . . . . . . . . . . . . . 7
3 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Important information . . . . . . . . . . . . . . . . . . 9
4.2 Requirements of the installation location . 10
4.3 Hot Water Unit mounting . . . . . . . . . . . . . . 11
4.4 Water connection . . . . . . . . . . . . . . . . . . . . 12
4.5 Gas connection . . . . . . . . . . . . . . . . . . . . . . 12
4.6 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.1 Before starting up the heater . . . . . . . . . . . 12
5.2 Remove the front cover . . . . . . . . . . . . . . . . 12
5.3 Inlet pressure adjustment . . . . . . . . . . . . . . 13
5.4 Burner pressure adjustment . . . . . . . . . . . . 13
5.5 Conversion to a different type of gas . . . . . 14
6 Operating instructions . . . . . . . . . . . . . . . . . . . . . . . 14
6.1 Consumer gas adjustment . . . . . . . . . . . . . 14
6.2 Consumer temperature/flow adjustment . 14
7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.1 Problem/cause/solution . . . . . . . . . . . . . . . 16
9 Environmental protection . . . . . . . . . . . . . . . . . . . . 17
10 Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
11 Warranty details . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

8 716 473 071 (2015/04)HydroPower
Safety information and symbols | 3
1 Safety information and symbols
1.1 Key to symbols
Warnings
The following keywords are defined and used in this document:
•NOTICE indicates a situation that could result in damage to
property or equipment.
•CAUTION indicates a situation that could result in minor to
medium injury.
•WARNING indicates a situation that could result in severe
injury or death.
•DANGER indicates a situation that will result in severe
injury or death.
Important information
Additional symbols
1.2 Safety information
If you smell gas:
▶ Close the gas supply valve to the appliance.
▶ Isolate gas supply from gas meter or LPG bottle.
▶ Do not operate any electrical appliances or switches (on/
off).
▶ Extinguish other sources of ignition.
▶ Go to a different location and call the gas supplier or an
authorised technician in order to check the gas supply.
If you notice dark combustion gases or sooting:
▶ Isolate the Gas supply to the heater.
▶ Notify an authorised technician.
Installation, Assembly and Modifications
▶ The installation, assembly and modifications to the heater
must only be performed by an authorised installer.
Maintenance
▶ The water heater is required to have a service and safety
inspection every two years.
▶ The Installer is responsible for the safety and
environmental compatibility of the installation.
▶ The Owner/User is responsible for keeping the area around
the water heater free from debris.
▶ Safe access to inspect and service the water heater is the
responsibilty of the property owner.
▶ Only original spare parts must be used, supplied by an
authorised distributor of Genuine Bosch parts.
Explosive and highly flammable material
▶ Do not store or use flammable material (paper, spray cans,
solvents, paints, etc) near the heater.
Combustion air and surrounding air
▶ To avoid corrosion, the combustion air and surrounding air
must be free from harmful substances.
▶ Do not spray aerosols or use chemicals around the heater
unless heater is isolated. (All valves closed).
Risk of damage due to operator error
Operator errors can result in injury and damage to property.
▶ Ensure that children never operate this appliance
unsupervised.
▶ Ensure that only personnel who can operate this appliance
correctly have access to it.
▶ Refer to the operating and user instructions before
adjusting the water heater.
To be installed and serviced only by an authorised person
The “authorised installing person” is responsible for:
▶ Correct installation and commissioning of this appliance.
▶ Ensuring the appliance performs to the specifications
stated on the rating label.
▶ Demonstrating the operation of the appliance to the
customer before leaving.
▶ Handing these instructions to customer.
THIS APPLIANCE IS NOT SUITABLE FOR POOL, SPA POOL OR
SOLAR BOOSTER APPLICATION.
NOT SUITABLE FOR COMMERCIAL BOOSTING OF A WARM
WATER RECIRCULATION SYSTEM.
Warnings in this document are identified by
a warning triangle printed against a grey
background.
Keywords at the start of a warning indicate
the type and seriousness of the ensuing risk
if measures to prevent the risk are not taken.
This symbol indicates important information
where there is no risk to people or property.
Symbol Explanation
▶ Step in an action sequence
Cross-reference to another part of the document
•Listentry
– List entry (second level)
Table 1

8 716 473 071 (2015/04) HydroPower
4 | Technical Characteristics and Dimensions
2 Technical Characteristics and Dimensions
2.1 General Description
2.2 Explanation of Model Code
2.3 Package contents
•Gashotwaterunit
• Documentation
2.4 Product overview
HydroPower Ignition is exclusive to Bosch - it does not require
a 240V power supply.
• HydroPower uses the energy created by the water flow to
ignite the burner and begin the heating process. The unit
only starts when a hot water tap is opened. Once the tap is
turned off, the unit turns off.
2.5 Description of the Hot Water Unit
• Hot Water Unit for external wall-mounting only
• Available in Natural gas or LP gas
• Hydrogenerator produces sufficient energy to ignite and
control the heater
– Water enters the Hydrogenerator
– The turbine spins with water flow
– A voltage is generated by the turbine
– This voltage causes the ignition control unit to light a
temporary pilot
– The water pressure opens the main burner gas valve
and the pilot ignites the main burner, the pilot then
goes out
– The water flows through the heat exchanger where it is
heated
•Safetydevices:
– Flame rod to check for accidental extinction of the
burner flame
– Overtemperature switch to prevent overheating.
• Water filter on the inlet water supply
Economical
Only heating water when required, the Bosch range is
extremely economical to run.
Versatile
LPG models are particularly popular in country areas, where
Natural Gas is not available.
Low Temperature Areas
In areas where the atmospheric temperature may drop to 0 °C
for brief periods, the installation of an EXOGEL valve (part
number H707 060 151) will minimise the possibility of
damage to the appliance if the water freezes.
Fig. 1 EXOGEL valve
[1] Hot water
[2] Cold water
[3] EXOGEL valve
Models Bosch Hydropower TF250/325/400
Category CONTINUOUS FLOW
Type GAS - EXTERNAL INSTALLATION
Table 2
TF (Top Flue) 250 (10 litres/min
@ 25 °C Rise)
G (Hydrogenerator)
TF (Top Flue) 325 (13 litres/min
@ 25 °C Rise)
G (Hydrogenerator)
TF (Top Flue) 400 (16 litres/min
@ 25 °C Rise)
G (Hydrogenerator)
Table 3
NOTICE:
This water heater MUST NOT be installed in
areas where the temperature remains below
0 °C for extended periods.

8 716 473 071 (2015/04)HydroPower
Technical Characteristics and Dimensions | 5
Low Flow Rates
This gas water heater is designed to operate at a minimum flow
rate between 3.2 to 4.0 litres per minute. Sufficient flow must
be provided to ensure the correct operation of the appliance.
There are various causes of a low flow rate including, but not
limited to:
• Low flow tapware
• Flow restrictors/aerators
•Handheldshowers
• Poor inlet pressure to property
• Restrictive pipework and/or fittings
Water fixtures with a flow rate of 7.5 litres per min for hand
basins and 9 litres per min for shower roses are recommended.
Failure of the unit to operate correctly due to poor flow rate will
not be covered by warranty.

8 716 473 071 (2015/04) HydroPower
6 | Technical Characteristics and Dimensions
2.6 Dimensions
Fig. 2
[1] Top flue
[2] Front cover
[3] Inspection window
[4] Wall mounting point
[5] Cold water inlet
[6] Gas inlet
[7] Hot water outlet
265
B
9708069951-01.2V
A
C
E
2
D
3
6
1
50
120120
Ø1/2" Ø1/2"
NG: Ø3/4"
LPG: Ø1/2"
4 4
7
5
Dimensions (mm) A B C D E Weight (kg)
TF250(10H) 405 845 533 240 68 21
TF325(13H) 405 845 533 240 68 22
TF400(16H) 460 936 533 240 82 25
Table 4 Dimensions

8 716 473 071 (2015/04)HydroPower
Technical Characteristics and Dimensions | 7
2.7 Electrical scheme
Fig. 3
[1] Main Solenoid Valve
[2] Diaphragm Switch
[3] Pilot Solenoid Valve
[4] Ionisation electrode (Flame Rod)
[5] Ignition electrode (Spark Electrode)
[6] Temperature limiter
[7] Hydrogenerator
[8] LED (green)
[9] LED (red)
2.8 Technical characteristics
45
3
1
2
9
6
8
SHV
9708069951-11.1V
7
Technical characteristics Units TF250H / 10H TF325H / 13H TF400H / 16H
Gas Consumption
Nominal Gas Consumption MJ/h 79 104 130
Supply pressure flowing
Natural gas (When operating) kPa 1.13 1.13 1.13
LP gas (When operating) kPa 2.75 2.75 2.75
Number of injectors 12 14 18
Water data
Maximum permissible pressure (Static) kPa 800 800 800
Temperature selector in fully clockwise position
Temperature rise (Above incoming water temperature) °C 50 50 50
Water flow range (Litres per minute) l/min 3.2 to 5 3.2 to 6.5 3.2 to 8
Minimum operating water pressure kPa 30 40 50
Minimum constant water pressure for minimum flow kPa 60 100 130
Table 5

8 716 473 071 (2015/04) HydroPower
8 | Regulations
3Regulations
All local by-laws and regulations pertaining to installation and
use of gas appliances must be observed.
This appliance must be installed in accordance with the
manufacturers installation instructions, AS/NZS5601, AS/
NZS3500 and all Local Building & Gas fitting regulations.
This appliance must not be installed indoors or in an enclosed
space. This appliance is approved for outdoor installation only.
Do not install this appliance withany modification or alteration.
Failure to install this appliance in accordance with these
installation instructions will void the warranty and may create
an unsafe situation.
4 Installation
Fig. 4 Heat shield
Temperature selector in fully anti-clockwise position
Temperature rise (Above incoming water temperature) °C 25 25 25
Water flow range (Litres per minute) l/min 4 to 10 4 to 13 4 to 16
Minimum operating water pressure kPa 45 45 45
Minimum constant water pressure for maximum flow kPa 100 140 170
Technical characteristics Units TF250H / 10H TF325H / 13H TF400H / 16H
Table 5
DANGER:
This appliance must not be installed indoors
or in an enclosed space in accordance with
AS/NZS5601.
DANGER: Explosion Risk!
▶ Always turn off the gas valve before
carrying out any work on components
which carry gas.
DANGER: Appliance malfunction!
This appliance must be installed with no
obstructions to air entry openings at the
front, rear, side, or top.
▶ Periodic checking of openings to ensure
no blockage or obstruction of the air
openings from plants, debris, or insects
must be carried out.
NOTICE: Property damage!
If the appliance is to be installed on a
combustible surface:
▶ Use a heat shield as per AS/NZS5601 -
accessory
9 708 061 400.ZG1 (Fig. 4).
The installation and the initial startup are to
be carried out only by an authorised person.
Not suitable for pool, spa pool, or solar
booster application.
Not suitable for commercial boosting of a
warm water recirculation system.
This appliance should only be installed in
applications where incoming cold water
temperature does not exceed 40 °C.
400 mm
850 mm
230 mm
=
9708069951-12.1V
=

8 716 473 071 (2015/04)HydroPower
Installation | 9
4.1 Important information
▶ Determine most suitable location for the appliance. Install
only on an external wall as close as possible to the most
frequently used hot water outlet. If the unit is to be installed
on a combustible surface, use a heat shield. (part number
9708 061 400.ZG1). Allow a minimum air gap of 10mm
between the flue and the heat shield.
▶ Ensure the mounting structure is capable of supporting the
weight of the appliance once installed. Secure the
appliance to the wall using fixings suitable for the weight of
the appliance and the wall material.
▶ As the water temperature at the outlet may exceed 50 °C, a
temperature limiting device (such as a tempering valve)
must be fitted to pipework feeding sanitary fixtures used
for the purpose of personal hygiene as per AS3498.
▶ Install gas and water isolation valves as close as possible to
the heater. Only use gate valve or full flow ball valve (fixed
mechanism type) for cold water.
▶ Check the cold water supply pressure to ensure it meets
the required supply pressure for the appliance. (
table 5).
▶ If the inlet water pressure exceeds 800 kPa, a pressure
limiting valve (500 kPa) MUST be fitted. The preferable
location for the pressure limiting valve is at the water
meter.
▶ Where the pressure limiting valve is less than 3 metres from
the hot water unit, it must be fitted in conjunction with a
cold water expansion valve (700 kPa), between the water
heater and the pressure limiting valve.
▶ Failure to comply with this requirement may void the
warranty.
▶ Refer to AS/NZS5601 for the relevant gas pipe sizing.
▶ After finishing the gas piping system, the pipes must be
thoroughly purged and leak tested. This test must be
performed with the gas isolation valve of the appliance
closed.
▶ Ensure the gas pressure and flow through the regulator are
appropriate for the consumption of the heater (à table 5).
Refer to AS/NZS5601 and AS3500.1 for the relevant pipe
size.
Note: Incorrect pipe sizing or gas supply pressure may cause
the appliance to underperform. Service calls for incorrect pipe
sizing and/or gas pressure, will NOT be covered under
warranty.
Minimum water supply pressure must meet
the requirements set out in table 5.
Water fixtures with a flow rate of 7.5 litres
per min for hand basins and 9 litres per min
for shower roses are recommended.
To reduce the chance of corrosion,
installation in a marine environment should
be avoided. Premature corrosion due to the
installation environment would not be
covered by warranty.
All gas appliances require adequate air
intake to ensure correct combustion. Insects
and dirt ingress may affect combustion
causing sooting. If you notice sooting from
the flue outlet the unit would require
servicing.
Pest and dirt ingress is not covered by the
manufacturers warranty.

8 716 473 071 (2015/04) HydroPower
10 | Installation
4.2 Requirements of the installation location
• Comply with the specific instructions for each State.
• Install the appliance in an outdoor location where it will not
be exposed to temperatures below zero.
• Install the appliance in accordance with the minimum
installation clearances indicated in Fig. 5, according to
AS5601.
• The gas heater must not be installed over a heat source.
• Do not obstruct the openings at top, bottom and rear of
appliance.
• Maximum of 2 meters from the ground to the base of the
appliance.
• Top and bottom areas must be clear from any obstacles at
least 30 cm.
Fig. 5 Minimum clearances (use as a guide only, always refer to AS/NZS5601)
[D] Openable Door
[T] Flue terminal
[M] Gas meter
[I] Mechanical air inlet
[P] Electricity meter or fuse box
[W] Openable window
c
j
j
d
a
n
b
ef
h
g
k
W
T
M
T
I
P
D
9708069951-14.2V

8 716 473 071 (2015/04)HydroPower
Installation | 11
Combustion gases
4.3 Hot Water Unit mounting
▶ Fix the appliance vertically, using the fixings appropriate
for the wall material and appliance weight.
Fig. 6 Heater mounting
[A] Appliance upper right corner position
Ref. Item
Minimum
clearances (mm)
a Below eaves, balconies and other projections:
- Appliances over 50 MJ/h input 500
b From the ground, above a balcony or other surface1)
1) Unless appliance is certified for closer installation
300
c From a return wall or external corner1) 500
d From a gas meter (M) (see 5.11.5.9 of AS/NZS5601 for vent terminal location of regulator) 1000
e From an electricity meter or fuse box [P] 500
f From a drain pipe or soil pipe 150
g Horizontally from any building structure1) or obstruction facing a terminal 500
h From any other flue terminal, cowl, or combustion air intake [T]1) 500
j Horizontally from an openable window, door, non-mechanical air inlet, or any other opening into a building with the
exception of sub-floor ventilation [W] [D] [T]:
- Appliances up to 150 MJ/h input 500
k From a mechanical air inlet, including a spa blower [I] 1500
n Vertically below an openable window, non-mechanical air inlet, or any other opening into a building with the exception of
sub-floor ventilation [W] [T]
- Appliances over 50 MJ/h input and up to 150 MJ/h input 1000
Table 6
Observe/comply with the minimum
clearances as in AS/NZS5601.
Draw a cross in the wall (Fig. 6, [A]) to
identify the appliance upper right corner
positioning.

8 716 473 071 (2015/04) HydroPower
12 | Commissioning
4.4 Water connection
Purge the water pipes before connection, because the
presence of dirt may reduce the flow and, in extreme cases,
cause a blockage.
▶ Identify the cold water pipe and the hot water pipe, so as to
avoid any possible cross-connection.
▶ Check and ensure water filter cleanness.
Fig. 7 Water connection
[A] Hot Water Outlet
[B] Cold Water Inlet
4.5 Gas connection
Gas regulator
The appliance is supplied with a gas pressure regulator already
installed. A regulator must be fitted to LPG cylinders to supply
the correct pressure to the appliance regulator.
The gas pressures require setting upon installation.
4.6 Testing
▶ Turn on the gas and water valves and check all connections
for leaks. If all connections are sound then follow
procedures set out in Section 5 for adjustment of Gas
Pressures to complete appliance commissioning.
5 Commissioning
5.1 Before starting up the heater
5.2 Remove the front cover
▶ Loosen the two knurled screws located on the rear side of
the front panel.
Fig. 8 Front cover removal
CAUTION:
Never rest the gas heater on the water or gas
connections.
CAUTION:
Isolating valve on the water inlet line must be
a Gate or ¼ turn full flow Ball Valve. A Stop
Valve, Duo Valve or Non-Return Valve must
not be fitted.
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 AS/NZS5601.
Incorrect gas pipe sizing will not be covered
by the warranty.
▶ Open all water and gas isolation valves.
▶ Purge the pipes.
CAUTION:
▶ 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.
970806995-08.2V

8 716 473 071 (2015/04)HydroPower
Commissioning | 13
5.3 Inlet pressure adjustment
Gas pressure adjustment (commissioning) MUST be carried
out upon installation.
▶ Check the gas indicated on the rating plate and front cover
label is the same as the gas to which the heater is
connected.
▶ Loosen the pressure test point screw on the left hand side
of the gas valve (Fig. 10, [A]) and attach a manometer.
Static Pressures should be greater than or equal to the figures
in table 7.
Adjust the appliance regulator to achieve the figures in table 7
with the unit operating and all hot water taps open for full water
flow through the unit.
If the operating inlet pressure cannot be achieved there may be
an issue with the gas supply meter (NG), cylinder regulator
(LPG), or pipe sizing (Ref AS/NZS5601). This must be resolved
before proceeding.
▶ Remove manometer and tighten test point screw.
5.4 Burner pressure adjustment
▶ Loosen the burner test point captive screw (Fig. 9 [D]).
▶ Connect a manometer to the burner pressure measuring
point.
Fig. 9 Burner pressure measurement point
Maximum gas flow adjustment
▶ Turn on the water heater with the gas control slide set to the
Right (maximum gas flow).
▶ Ensure the water control knob is fully open (anticlockwise).
▶ Adjust appliance regulator to the maximum burner
pressure figure on the rating plate (See table 8 below).
▶ Turn the water control knob fully clockwise and check that
the burner pressure does not exceed the maximum.
Minimum gas flow adjustment
▶ With the heater operating, move the gas selector to the Left
(minimum gas position).
▶ Ensure the water control knob is fully closed (clockwise).
▶ Open various hot water taps.
▶ Using the adjusting screw (Fig. 11, [B]) to adjust the gas
pressure to the values indicated in table 9.
▶ Close the hot water taps.
DANGER:
The following procedures must only be
performed by a qualified technician.
Measurements should be made with unit
operating with all hot water taps opened to
achieve maximum water flow through the
unit.
If possible all other gas appliances (ducted
heating etc.) should be operating at the same
time.
Natural gas LP gas
Inlet Pressure
(kPa)
TF250/10H
1.13 2.75TF325/13H
TF400/16H
Table 7 Inlet pressure
Natural gas LP gas
Max. Burner
Pressure (kPa)
TF250/10H 0.89 2.60
TF325/13H 0.84 2.60
TF400/16H 0.78 2.60
Table 8 Maximum burner pressure
D
9708069951-9.1V

8 716 473 071 (2015/04) HydroPower
14 | Operating instructions
▶ Remove manometer and tighten test point screw.
Fig. 10 Gas pressure measurement point
Fig. 11 Minimum gas flow adjusting screw
5.5 Conversion to a different type of gas
It is not recommended to convert these units to a different type
of gas.
6 Operating instructions
6.1 Consumer gas adjustment
For lower water temperature (Fig. 12).
Slide to the left will give lower water temperature and use less
gas.
Fig. 12
For higher water temperature (Fig. 13).
Slide to the right will give higher water temperature but use
more gas.
Fig. 13
6.2 Consumer temperature/flow adjustment
▶Turnanti-clockwise
Increases flow and decreases water temperature (Fig. 14).
Fig. 14
▶Turnclockwise.
Decreases flow and increases water temperature.
Regulating the temperature to the minimum required value
reduces energy consumption.
The LED light is not normally visible with the cover on,however
the green LED indicates that the appliance has detected a flame
and is operating correctly.
If the red LED is flashing this indicates a fault condition and
should be investigated by a qualified technician.
Natural gas LP gas
Min Burner
Pressure (kPa)
TF250/10H
0.30 0.64TF325/13H
TF400/16H
Table 9 Minimum burner pressure
9708069951-18.1V
A
9708069951-17.1V
B

8 716 473 071 (2015/04)HydroPower
Maintenance | 15
7Maintenance
To ensure ongoing performance and safety, we require the
appliance be serviced every two years.
▶ Your appliance should only be attended by a Bosch
authorised service agent.
▶ Only use original replacement parts.
DANGER:
Failure to perform maintenance procedures
can lead to appliance malfunction, errors,
service calls and loss of manufacturers
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.

8 716 473 071 (2015/04) HydroPower
16 | Troubleshooting
8Troubleshooting
8.1 Problem/cause/solution
Assembly, maintenance, and repairs must be performed by qualified technicians only. The following chart offers possible solutions
to problems.
In most instances it is advisable to have a technician attend and inspect the appliance.
Some further trouble shooting advice may be found at http://www.bosch-climate.com.au
Problem Cause Solution
Fluctuation in hot water temperature. Insufficient flow through the hot water
unit.
Tapware does not give sufficient flow
(section 2.5, Low Flow Rates).
Increase water flow by opening multiple
hot taps.
If fluctuation ceases then check for
blockages, aerators dirty etc.
Change tapware to meet requirements.
Unit not working. (No Hot Water). Locked out due to failure to ignite.
The ignition will lock out after 20 seconds
if a flame is not established.
Turn off all hot water taps and retry.
If unit still does not work - isolate valves at
unit for 20 seconds. Open valves and
retry.
If unit still fails to ignite refer to qualified
technician.
Unit not working after change in Gas
Supply (Maintenance work on Mains or
change of LPG cylinders).
Air in gas lines. Turn on hot water tap inside house.
Isolate water valve at unit for 20 seconds.
Open valve and check if unit lights.
Repeat this operation 3-4 times, if unit
still fails to ignite call your Gas Retailer or
a qualified technician.
Not hot enough. Insufficient Natural Gas supply.
Consumer gas and water controls.
Gas Cylinders may be empty / undersized
(45kg cylinders recommended for LPG).
Requires a service technician to inspect
and test gas supply pressures /
recommission.
Adjust gas and water controls.
Smell of gas. Gas leak. Isolate Gas supply to hot water unit/
premises.
Call your Gas Retailer or a qualified
technician.
Temperature too hot in Summer. Incoming water temperature has
increased with the ambient temperature
and Gas control is on hot position (Fully
right).
Adjust Water and Gas controls at the unit
to achieve desired temperature.
Temperature too cold in Winter. Incoming water temperature has
decreased with the ambient
temperature.Gas control is on warm
position (Fully Left).
Adjust Water and Gas controls at the unit
to achieve desired temperature.
Table 10

8 716 473 071 (2015/04)HydroPower
Environmental protection | 17
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.
Reduced water flow. Insufficient water supply pressure.
Dirty taps or mixers.
Water valve blocked (filter).
Heat exchanger blocked (limescale).
Requires a service technician to inspect
and test water supply pressures, and
water components of the hot water unit.
Unit makes a loud bang when igniting. Explosive ignition is not normal
behaviour.
Call a qualified technician.
Presence of soot/black marks observed at
top of flue / on wall.
This is not normal behaviour.
This is normally caused by blockages in
the burner causing poor combustion.
One of the causes of blockages is insects
blocking burner orifices, this cannot be
avoided as adequate air flow is required
for complete combustion.
All gas appliances require adequate air
flow for proper combustion. The ingress
of insects or dirt into the unit are not
covered by warranty as a manufacturing
fault is not present. The unit will need
cleaning and servicing at the owners’ cost.
To minimise the chance of the issue
recurring, a surface type insecticide can
be used with care, consultation with a
licensed pest controller is recommended.
Isolate the valves to the unit and spray
surrounds with a surface spray.
Leave for 15 minutes before turning hot
water on.
Water takes a long time to reach hot taps. Location of unit. If the unit is located a long way from the
outlet there will be an amount of cold
water that has to leave the pipe before the
hot water is available. As the hot water
unit does not operate at a large flow rate
this may appear to take a long time,
particularly if it has replaced a mains
pressure storage heater.
Open hot tap to full to increase flow rate
and reduce time.
Problem Cause Solution
Table 10

8 716 473 071 (2015/04) HydroPower
18 | Water quality
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.
While Bosch water heaters are warranted against
manufacturing 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 the 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. 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 11

8 716 473 071 (2015/04)HydroPower
Warranty details | 19
11 Warranty details
Robert Bosch (Australia) Pty Ltd
Thermotechnology Division
Voluntary Repair or Replacement Warranty
All Bosch products are carefully checked, tested and certified to Australian and New Zealand standards.
Important Note: Mandatory Australian Consumer Law statement
If you have purchased your product in Australia, you should be aware that:
This warranty is provided in addition to other rights and remedies held by a consumer at law. 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.
Important Note: New Zealand law
If you have purchased your product in New Zealand, you should be aware that:
This warranty is supplemental to any other rights and remedies you have under the Consumer Guarantees Act 1993 NZ, unless your
purchase is made for commercial purposes, in which case Bosch excludes all consumer guarantees implied in the Consumer
Guarantees Act 1993 NZ in respect of your product.
Warranty
Bosch warrants, at its option, to repair or replace your water heater or relevant part thereof (Product) if such Product are faulty or
defective in manufacture or materials during the warranty period specified below.
The warranty period commences on the date of purchase. If the date of original purchase cannot be determined, then the warranty
period will commence six (6) months after the date of manufacture stamped on the Product. Bosch may require evidence to verify
the date of purchase.
This warranty only covers repair or replacement of defective Product (including labour costs where indicated). It does not cover:
• any costs incurred by the end user in normal or scheduled maintenance of the Product; or
• subject to any law to the contrary, any damage to property, personal injury, direct or indirect loss, consequential losses or other
expenses arising from breach of this warranty. Any end user concerned with this exclusion should consider the "Important Note:
Mandatory Australian Consumer Law statement” above
Warranty Period and Coverage
Bosch will provide warranty service for Product purchased and installed in Australia and New Zealand as follows.
"Parts & Labour" means free of charge repair and/or replacement, including labour.
"Parts only" means a replacement heat exchanger, free of charge. All installation and repair labour costs are the responsibility of
the owner.
Components
The period after purchase within which
the fault must appear
What Bosch will do (see below for
definitions)
Domestic Use (see below for definition)
All components Year [1 to 2] Parts & Labour
Heat exchanger Year [3 to 10] Parts only
Commercial Use (see below for definition)
All components Year [1] Parts & Labour
Heat exchanger Year [1] Parts only
Table 12

8 716 473 071 (2015/04) HydroPower
20 | Warranty details
"Domestic use" warranty period applies to Product installed to supply hot water for use by individuals in domestic dwellings. For
Product used for all other uses, the commercial use warranty period will apply. This includes, without limitation, installations such
as centralised or bulk hot systems, hotels, sporting complexes, caravan parks, laundry facilities, restaurants and cafes.
For “Parts only” warranty, the end user will be charged for service call costs andservice technician fees in effecting the replacement.
For valid claims within "Parts & Labour" warranty periods, the end user will not be charged for costs associated with making a
warranty claim, including service call costs, any service technician fees or the cost of replacement parts and freight, provided that:
• the Product is located within the usual operating area of an authorised service technician; and
• the Product has been installed according to the installation instructions so as to provide adequate service access
If the Product is not located within the usual operating area of an authorised service technician, the end user will be required to pay
the service call costs associated with a service call under this voluntary warranty.
Notwithstanding the above, if the Product has not been installed in accordance with the installation instructions in regards to
access, or has been otherwise installed in location where service access is difficult, the end user will be required to pay charges
associated with the difficult access. This includes, but is not limited to, the removal of walls or doors to gain access and the use of
specialised equipment to move the Product or components to safe working levels. Where the Product cannot be safely accessed,
Bosch may refuse to service the Product under this voluntary warranty.
For invalid claims under this voluntary warranty, the end user will be liable for the costs of making the warranty claim including any
service call costs.
Warranty Conditions
This voluntary warranty is subject to the following conditions:
• The Product must have been installed and correctly commissioned by an authorised and licensed installer in compliance with
applicable Australian Plumbing and Gas Standards. Proof may be required of correct commissioning of the Product (such as
certificate of compliance). Claims for failures due to incorrect installation or commissioning are not covered under this
voluntary warranty and may be rejected by Bosch.
• Where a Product or part thereof is replaced or repaired under this voluntary warranty, the balance of the original voluntary
warranty will apply. The replacement Product or part does not carry a new voluntary warranty.
• The Product must have its original serial numbers and rating labels intact.
• The warranty does not extend to any Product that have been completely or partially disassembled.
• These warranty terms cannot be amended except in writing by an authorised officer of Bosch.
• The warranty only applies to Product installed for an end user in Australia or New Zealand and purchased from Bosch or from a
reseller where the Product have been originally sold by Bosch.
• Any claim made under this voluntary warranty meets the requirements set out below in the “How to Make a Warranty Claim”
section.
Warranty Exclusions
This warranty will not apply to a defect or fault to the extent to which it arises:
• due to storage, handling or installation of the Product otherwise than in accordance with instructions provided for the Product
by Bosch or without reasonable care, including installation of a Product which is of inappropriate size or type for the intended
purpose;
• due to operation, use or maintenance of the Product otherwise than in accordance with instructions provided for the Product
by Bosch or without reasonable care, including use of the Product with faulty or unsuitable plumbing, water pressure, power or
gas supply;
• due to accidental damage or use of the Product for a purpose or in environmental conditions for which the Product were not
designed or sold, or use of the products outside the specified or normal operating ranges for such Product.
• as a result of changes which occur in the condition or operational qualities of the Product due to climate or other environmental
influence, foreign material contamination or water entry or as a result of exposure to excessive heat or solvents or because of
use of non-potable water or bore water in the Product or damage as result of an Act of Nature including but not limited to storms,
fires, floods and lightning strikes;
• from normal wear and tear or when replacement or repair of parts would be part of normal maintenance or service of the Product
or where the damage is only to surface coating, varnish or enamel;