Bosch Tronic 3000 C Pro US12 User manual

[en] Installation and Operating instructions 2
[es] Instrucciones de instalación y funcionamiento 15
[fr] Instructions d'installation et d'utilisation 29
Electric water heaters
Tronic 3000 C Pro
Model US12
6 720 647 088 (2017/05) US
IMPORTANT: This booklet should be given to the customer after installation and demonstra-
tion.
For Service & Installation contact:
BOSCH Thermotechnology Corp.
50 Wentworth Avenue, Londonderry

6 720 647 088 (2017/05) Tronic 3000 C Pro
2 | Table of contents
Table of contents
1 Explanation of Symbols and Important Safety
Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 IMPORTANT SAFETY INSTRUCTIONS . . . . . 4
2 Information about the heater . . . . . . . . . . . . . . . . . . . 4
2.1 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Technical identification code . . . . . . . . . . . . 5
2.3 Model name and number identification . . . . 5
2.4 Package contents . . . . . . . . . . . . . . . . . . . . . 5
2.5 General description . . . . . . . . . . . . . . . . . . . . 5
2.6 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Important information . . . . . . . . . . . . . . . . . . 7
4.2 Installing the Tronic 3000C Pro . . . . . . . . . . 7
4.3 Water connections . . . . . . . . . . . . . . . . . . . . 7
4.4 Electrical connections . . . . . . . . . . . . . . . . . . 8
4.5 Securing the unit to the wall . . . . . . . . . . . . . 9
5 Starting up the Tronic 3000C Pro . . . . . . . . . . . . . . 10
5.1 Sink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2 Adjusting the flow . . . . . . . . . . . . . . . . . . . . 11
5.3 Appendix Flow vs. Temperature
Setting Guide . . . . . . . . . . . . . . . . . . . . . . . 12
6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1 For the Installer . . . . . . . . . . . . . . . . . . . . . . 13
6.2 For the User . . . . . . . . . . . . . . . . . . . . . . . . . 13
7 Interior components and parts list . . . . . . . . . . . . . 14

6 720 647 088 (2017/05)Tronic 3000 C Pro
Explanation of Symbols and Important Safety Instructions | 3
1 Explanation of Symbols and Important
Safety Instructions
1.1 Key to symbols
Warnings
The following keywords are defined and can be used in this
document:
•NOTICEindicatesasituationthatcouldresult 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
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
ifmeasurestopreventtheriskarenottaken.
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
• List entry
– List entry (second level)
Table 1

6 720 647 088 (2017/05) Tronic 3000 C Pro
4 | Information about the heater
1.2 IMPORTANT SAFETY INSTRUCTIONS
Whenusingthiselectricalequipment,
basic safety precautions should
always be followed, including the
following:
▶READ AND FOLLOW ALL
INSTRUCTIONS.
▶ This appliance must be grounded.
▶ Disconnect this product from the
electrical supply before cleaning,
servicing or removing the cover.
▶ To reduce the risk of injury, close
supervision is necessary when the
product is used near children or
elderly persons.
▶ Warning: Indoor installation only,
where it will NOT be exposed to
freezing.
▶ Warning: Do not install a check valve
or any other types of back flow
preventer within six feet of the cold
water inlet.
▶ The electrical installation must
conformtocurrent National Electrical
Codes.
▶ Warning: Do not switch the heater on
if you suspect that it may be frozen.
Wait until you are sure that it has
completely thawed cut.
▶ The Tronic 3000C Pro is designed to
heat potable cold water for domestic
purposes. Contact Bosch
Thermotechnology before specifying
orinstallingtheapplianceinanyother
application.
Additional Canadian Safety
Instructions
• A green terminal (or wire connector
marked "G", "GR", "GROUND", or
"GROUNDING")isprovidedwithinthe
control box. To reduce the risk of
electric shock, connect this terminal
or connector to the grounding
terminal of the electric service of
supply panel with a continuous
copper wire in accordance with the
Canadian Electrical Code, Part I.
• This product shall be protected by a
Class A ground fault circuit
interrupter.
SAVE THESE INSTRUCTIONS
▶ Keep this guide in a safe place once
your Tronic 3000C Pro unit has been
installed.
▶ You may need to refer to it for general
instructions or future maintenance.
2 Information about the heater
2.1 Disclaimer
2.1.1 Approval number
Commonwealth of Massachusetts
As a condition of installing this product in the Commonwealth
of Massachusetts a pressure relief valve shall be installed on
the cold water side, by a licensed plumber MGL 142 Section
19.
(Approval number: P1-09-25).

6 720 647 088 (2017/05)Tronic 3000 C Pro
Information about the heater | 5
2.2 Technical identification code
[US] Electronic Instantaneous
[12] Maximum output (kW)
[M] Mechanical temperature control
[W] Wall hung
[I] Indoor
[H] Horizontal installation
[B] Water connections
2.3 Model name and number identification
2.4 Package contents
• Electric water heater
• 4 No. 8 wood screws
2.5 General description
Fig. 1
[1] Mouting hole
[2] Heat exchanger tube
[3] Control P.C.B
[4] Heating elements
[5] Terminal block
[6] Cable rear entry
[7] Ground stud
[8] Cable clamp
[9] Cable side entry
[10] Neon light
[11] Hi temp thermal cut-out (manual re-set)
[12] Cover fixing screw
[13] Flow switch
[14] Outlet
[15] Inlet
2.6 Function
• Water comes in through the cold water inlet.
• The flow switch senses water is passing through the unit. If
it detects more than the pre-set level, the unit’s heating the
elements switch on. This is shown by the neon light
glowing.
US 12 M W I H B
Table 2
Model Name Model Number
Tronic 3000 C Pro US 12 M W I H B
Table 3
The heater is designed for cold water supply
only. Do not supply with pre-heated water.

6 720 647 088 (2017/05) Tronic 3000 C Pro
6 | Regulations
• The water is heated instantly as it pas ses through the
copper heat exchanger tube.
• The unit is Thermostatic i.e. it will switch the elements on
and off in order to maintain a constant outlet temperature.
The temperature of the water coming out of the unit depends
on:
• The voltage of the electrical supply,
• The temperature of the incoming water.
• The setting of the temperature dial.
A high flow rate can also negatively effect the hot water
temperature.
Dependingontheregion of the country, the temperature of the
water supply can vary from 40°F in winter to about 70°F in the
summer, with an average of about 50°F. Extreme weather
conditions can cause the inlet temperature to go outside these
boundaries, making it necessary to adjust the Temperature
Adjustment Spindle and/or the inlet water flow
Manual reset thermal cut-out
• The unit has one double pole thermal cut out which is
mounted on the heat exchanger tube.
• When tripped the cut out needs to be reset manually inside
the unit.
• The cut-out will trip only in exceptional circumstances (Fig.
2 ). Call your service person or Bosch Thermotechnology
Corp. if this happens frequently.
Fig. 2
[A] Thermal cut out
3 Regulations
Any local by-laws and regulations pertaining to installation and
use of electric water heater appliances must be observed.
Please refer to the laws that should be attended in your
country.
• Theelectrical installation must conform to current National
Electrical Codes.
• Toreducetheriskofelectricalshock,connectthisterminal
or connector to the grounding terminal of the electrical
service of supply panel with a continuous copper wire in
accordance with the Canadian Electrical Code, Part I.
• This product shall be protected by a Class A ground fault
circuit interrupter.
• The unit must be wired by a qualified electrician, in
accordance with the current version of the National
Electrical Code US) or Canadian Electric Code (Canada).
• When the heater is not within sight of the electrical circuit
breakers, a circuit breaker lockout or additional local
means of disconnection for all non-grounded conductors
must be provided that is within sight of the appliance. (Ref
NEC 422.31.).
• The power cable size and the installation must be in
accordance with the Canadian Electrical Code, C22.1-02.
4 Installation
WARNING:
▶ Alwaysswitchofftheelectricalsupplyto
the unit before you remove the cover.
WARNING:
California Proposition 65 lists chemical
substances known to the state to cause
cancer, birth defects, death, serious illness
or other reproductive harm. This product
may contain such substances, be their
origin from fuel combustion (gas, oil) or
components of the product itself.
DANGER: Risk of electric shock!
▶ For safety reasons, disconnect the
power supply to the heater before any
service or testing is performed.

6 720 647 088 (2017/05)Tronic 3000 C Pro
Installation | 7
4.1 Important information
Please follow these instructions. Failure to follow instructions
may result in:
• Damage or injury.
• Improper installation/operation.
• Loss of warranty.
4.1.1 Freeze prevention
Introduction
Please note that the installation manual states that the water
heater must not be installed in a location where it may be
exposed to freezing temperatures. If the heater must be left in
a space that is likely to experience freezing temperatures, all
water must be drained from the heater.
Freeze damage is not covered under the warranty.
Draining the heater
Due to the shape of the heat exchangers and connecting pipe,
it is extremely difficult to get all of the water out of the heater.
Follow the procedure below to best minimize the chance of
freezing:
▶ Disconnect electric supply.
▶ Disconnect cold and hot water pipes from fittings on
bottom of heater. Allow water to drain out (have a catch
basin ready).
▶ After allowing all water to drain out, the heater should be
blown out with low pressure compressed air to remove as
much water as possible from water heater modules. Bursts
of air work better than continuous flow.
Remember, these suggestions are only made to help minimize
the potential for freeze damage and are not to be construed as
the guaranteed method for dealing with freeze possibilities.
4.2 Installing the Tronic 3000C Pro
To operate correctly the unit needs the following running
pressures:
Sink
• Min: 10 psi (0,7 bar)
• Max: 150 psi (10,3 bar)
4.3 Water connections
▶ The unit should be connected directly to the main cold
water supply and not to pre- heated water. The unit should
beinstalledwithservice valves on both the inlet and outlet.
These valves can be used to turn off the water supply to the
unit if it needs servicing, or to reduce the water flow if it is
too high.
WARNING:
▶ This heater must be electrically
grounded in accordance with the most
recent edition of the National Electrical
Code. NFPA 70. In Canada, all electrical
wiring to the heater must be in
accordance with local codes and the
Canadian Electrical Code, CSA C22.1
Part 1.
DANGER:
▶ Theinstallationmustonlybeperformed
byaqualifiedpersoninaccordancewith
these instructions.
▶ Bosch Thermotechnology Corp. is not
responsible for improperly installed
appliances.
WARNING:
▶ The heater must only be mounted in a
vertical position with the water fittings
located at the bottom of the heater.
Under no circumstances should the
heater be mounted differently.
WARNING:
▶ ELECTRICITY IS EXTREMELY
DANGEROUS. TAKE EXTRA
PRECAUTIONS AND ENSURE ALL
CIRCUIT BREAKERS ARE OFF BEFORE
PERFORMING ANY WORK TO THE
HEATER.
Useofagentslikeanti-freezearenotallowed
as they may cause damage to the water
heater’s internal components.
WARNING:
▶ Do not install the Tronic 3000C Pro in a
room where there is a chance of
freezing.
NOTICE:
▶ Read entire instructions.
▶ Check the pressure of the main water
supply.

6 720 647 088 (2017/05) Tronic 3000 C Pro
8 | Installation
▶ We recommend that you use ½" copper or high pressure
flex connections.
▶ Use Teflon tape for sealing pipe threads. Do NOT use pipe
dope.
▶ Remember to keep the hot water pipe runs as short as
possible. In some cases it may be worth fitting a second
unit to serve an additional fixture.
▶ The inlet and outlet are clearly marked on the unit. They
each have a ½" NPT connector.
▶ If the unit is to supply more than one sink, a similarly flow
restricted aerator should be used at each tap. If not, the
highest flowing outlet will take all the water under dual
usage.
▶ If the unit is to supply a sink, we recommend that you use
aerators, which you can get from your local distributor/
dealer.
▶ After the unit has been plumbed in, and before you wire it,
flush it with water to remove any debris or loose particles.
Failure to do so may make the unit inoperable.
4.3.1 Water quality
Water quality can have an impact on appliance longevity and
may not be covered under the manufacturer's warranty.
▶ Forwateranalysisdatacall your local waterdepartment,or
if on a well, have well water analyzed periodically.
Ifwaterqualityexceedsoneormoreofthevaluesspecified
below, Bosch recommends consulting a local water
treatment professional for water softening/conditioning
options.
4.4 Electrical connections
▶ Strip back the insulation on the power wires about 3/8".
Anyinsulationonthegroundshouldbestrippedbackabout
3/4".
▶ Feed the cable through the cover bottom or backplate
entry grommets, as appropriate.
Asaconditionofinstallingthisproductinthe
Commonwealth of Massachusetts a
pressurereliefvalve mustbeinstalled onthe
cold water side by a licensed plumber. MGL
42 Section 19.
WARNING:
▶ The unit must be installed by a qualified
electrician.
▶ The unit must be grounded.
▶ Connect the unit to power.
Description Max. Levels
pH pH 6.5 - 8.5
TDS (total Dissolved Solids) mg/l or ppm 500
Total hardness mg/l or ppm 100
(6 grains)
Aluminum mg/l or ppm 2.0
Chlorides mg/l or ppm 250
Copper mg/l or ppm 1.0
Iron mg/l or ppm 0.3
Manganese mg/l or ppm 0.05
Zinc mg/l or ppm 5.0
Table 4
Model Rated Voltage
(V)
Rated
Current (A)
Recommend Wire
Size (AWG)
US12 240 50 6
Table 5

6 720 647 088 (2017/05)Tronic 3000 C Pro
Installation | 9
▶ Connect the cables to the terminal block and ground stud
(Fig. 3 ):
Fig. 3 Cable termination
[1] Ground
[2] Rubber sleeve
▶ Make sure that all the terminal block screws are tightened
securely. Loose connections can cause wires to neat up.
▶ Make sure that the ground wire is wrapped around its
terminalstudandintothesaddlewasher.Thenutshouldbe
tightened securely.
▶ Attach the front cover and tighten the retaining screws.
4.5 Securing the unit to the wall
4.5.1 Deciding the position
▶ Ifbeingusedinapublicplace,positiontheunitout of reach
to discourage vandalism.
▶ Mount the unit onto a flat section of wall, well away from
any potential splashes of water or spray.
▶ Position the unit as shown (Fig. 4 ).
Remember to keep the length of hot water pipe to a
minimum in order to save energy.
▶ If the unit is to supply a sink, you can It it either above or
below the sink.
NOTICE:
When the Tronic 3000C Pro is not within
sight of the electrical circuit breakers, a
circuit breaker lockout or additional local
meansofdisconnectionforallnongrounded
conductors must be provided that is within
sight of the appliance. (REF NEC 422.31).
WARNING:
▶ Unit must be mounted as shown in Fig.
4 with plumbing connection on the
bottom.Undernocircumstancesshould
the unit be mounted differently.

6 720 647 088 (2017/05) Tronic 3000 C Pro
10 | Starting up the Tronic 3000C Pro
Fig. 4 Examples of installations (Show front view)
[1] Cold water
[2] Hot water
4.5.2 Deciding the wiring route
You have a choice of whether to feed the electric cable through
the cover bottom or through the back of the unit,
▶ If it is going to be through the cover bottom, cut out the
plastic lug to expose the rubber sleeve (Fig. 5 ):
Fig. 5 Unit cover
▶ If it is going through the back of the cover unit, cut through
the grommet on the backplate with a sharp knife. Make
sure that you do not remove the grommet from the
backplate (Fig. 6 ):
Fig. 6 Back of unit
[1] Grommet
[2] Fixing holes
▶ Feed the cable through the grommet before you mount the
unit to the wall. If you are using an approved cable fitting,
remove the grommet.
4.5.3 Mounting on the wall
▶ Undo the retaining screws on the cover and take the cover
of the unit. Hold the backplate in position against the wall
while you mark the four mounting holes.
▶ Drill the holes and secure the unit to the wall using the four
no. 8 wood screws supplied.
5 Starting up the Tronic 3000C Pro
WARNING:
▶ Do not install a non-return check valve
within 6 feet of the inlet.
12
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