TRONIC 3000C Pro US3
Bosch TRONIC 3000C Pro US3, TRONIC 3000C Pro US6, TRONIC 3000C Pro US7 Installation Manual And Operating Instructions
[en] Installation Manual and Operating Instructions 2
[es] Instrucciones de instalación y funcionamiento 17
[fr] Instructions d'installation et d'utilisation 33
Electric water heaters
TRONIC 3000C Pro
Models:US3, US6, US7 & US9
6 720 647 005 (2014/04) US
IMPORTANT: This booklet should be given to the customer after installation and demonstration.
For Service & Installation contact:
BOSCH Thermotechnology Corp.
50 Wentworth Avenue, Londonderry
NH 03053
Phone
603-552-1100
www.bosch-climate.us
6 720 647 005 (2014/04) TRONIC 3000C 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 . . . . . 3
2 Information about the heater . . . . . . . . . . . . . . . . . . . 3
2.1 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Technical identification code . . . . . . . . . . . . 4
2.3 Package contents . . . . . . . . . . . . . . . . . . . . . 4
2.4 Model name and number identification . . . . 4
2.5 General description . . . . . . . . . . . . . . . . . . . . 5
2.6 Electrical diagram . . . . . . . . . . . . . . . . . . . . . 6
2.7 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Important information . . . . . . . . . . . . . . . . . . 8
4.2 Installing the Tronic 3000C Pro . . . . . . . . . . 9
4.3 Water connections . . . . . . . . . . . . . . . . . . . . 9
4.4 Electrical connections . . . . . . . . . . . . . . . . . 10
4.5 Securing the unit to the wall . . . . . . . . . . . . 11
5 Starting up the Tronic 3000C Pro . . . . . . . . . . . . . . 12
5.1 Sink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 Adjusting the flow . . . . . . . . . . . . . . . . . . . . 13
6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1 For the Installer . . . . . . . . . . . . . . . . . . . . . . 14
6.2 For the User . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Interior components and parts list . . . . . . . . . . . . . 16
6 720 647 005 (2014/04)TRONIC 3000C 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:
• 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 IMPORTANT SAFETY INSTRUCTIONS
When using this electrical equipment, 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: Do not install the heater in a location where it may
be subject 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 conform to current 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 or installing the
appliance in any other application.
Additional Canadian Safety Instructions
• A green terminal (or wire connector marked "G", "GR",
"GROUND", or "GROUNDING") is provided within the
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
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
• List entry
– List entry (second level)
Table 1
6 720 647 005 (2014/04) TRONIC 3000C Pro
4 | Information about the heater
the cold water side, by a licensed plumber MGL 142 Section
19.
(Approval number: P1-09-25).
2.2 Technical identification code
[US] Electronic Instantaneous
[3] Maximum output (kW)
[M] Mechanical temperature control
[W] Wall hung
[I] Indoor
[H] Horizontal installation
[B] Water connections
2.3 Package contents
• Electric water heater
• 4 No. 8 wood screws
2.4 Model name and number identification
US 3 - 1 MW IHB
US 6 - 1 MW IHB
US 7 - 1 MW IHB
US 9 - 1 MW IHB
Table 2
Model Name Model Number
Tronic 3000C Pro US 3-1 Pro M W I H B
Tronic 3000C Pro US 6-1 Pro M W I H B
Tronic 3000C Pro US 7-1 Pro M W I H B
Tronic 3000C Pro US 9-1 Pro M W I H B
Table 3
6 720 647 005 (2014/04)TRONIC 3000C Pro
Information about the heater | 5
2.5 General description
Fig. 1
[1] Mounting hole
[2] Heat exchanger tube
[3] Thermal cut-out (manual re-set)
[4] Heating elements
[5] Terminal block
[6] Cable rear entry
[7] Ground stud
[8] Cable clamp
[9] Filter and water pipe mounting
[10] Cable side entry
[11] Flow switch
[12] Power selector
[13] Cover fixing screw
[14] Neon light
[15] Outlet
[16] Inlet
6 720 647 005 (2014/04) TRONIC 3000C Pro
6 | Information about the heater
2.6 Electrical diagram
Fig. 2 Internal wiring plan
[1] Power selector and flow switch
[2] Heating elements
[3] Electrical supply
[4] Neon
[5] Manual reset Thermal cut-out
DANGER: Risk of electric shock!
▶ Always switch off the electrical supply to
the unit before removing cover or
performing any maintenance and
service.
6 720 647 005 (2014/04)TRONIC 3000C Pro
Information about the heater | 7
2.7 Function
How the water heater works:
• Water comes in through the cold water inlet.
• The flow switch senses how much water is passing through
the unit. If it detects more than the preset level, the unit’s
heating elements switch on. This is shown by the neon light
glowing.
• The water is heated instantly as it passes through the
copper heat exchanger tube.
The temperature of the water coming out of the unit depends
on:
• The voltage of the electrical supply,
• The temperature of the incoming water supply,
• The setting of the power selector,
• The flow rate,
• The power rating of the unit.
• Depending on the region of the country, the temperature of
the water supply can vary between 40 °F in winter to 70 °F
in summer, with an average of 50 °F.
Fig. 3
[A] Manual reset thermal cut out
The table below shows the rise in water temperature you can
expect from the unit:
Manual reset thermal cut-out
The unit has a thermal cut-out (Fig. 1 ) which is mounted on
the heat exchanger tube. This will switch off the heater
elements if the water temperature goes above 194 °F.
If the cut-out trips it will need to be reset manually inside the
unit. This cut-out will only operate in exceptional
circumstances (Fig. 3 ). Call your service person or Bosch
Water Heating if this happens frequently.
The heater is designed for cold water supply
only. Do not supply with pre-heated water.
Model Volts Amps
Element
Resistance
High
Setting
Low Setting Temperature Rise (deg F) at Flow Rate (GPM)
0,5
GPM
0,75
GPM
1,0
GPM
1,5
GPM
2,0
GPM
2,5
GPM
US9 240 40 2x12 9,5kW - NA 84F 64F 42F 32F NA
US9 240 20 1x12 - 4,75kW NA 42F 32F 21F 16F NA
US9 208 35 2x12 7,1kW - NA 64F 48F 32F 24F NA
US9 208 18 1x12 - 3,5kW NA 32F 24F 16F 12F NA
US6 277 22 2x25 6,0kW - 81F 55F 42F 27F NA NA
US6 277 11 1x25 - 3,0kW 41F 28F 21F 14F NA NA
US3 120-110 27 2x8 3,4-3,0kW - 41F 28F 20F NA NA NA
US7 240-220 30 2x16 7,2-6,1kW - NA 63F 48F 32F 24F NA
US7 240-220 15 1x16 - 3,6- 3,05kW NA 32F 24F 16F 12F NA
Table 4
6 720 647 005 (2014/04) TRONIC 3000C Pro
8 | Regulations
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.
• The electrical installation must conform to current National
Electrical Codes.
• To reduce the risk of electrical shock, connect this terminal
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.
• In the Commonwealth of Massachusetts a licensed
plumber or electrician must perform the installation.
(Approval number: P1-09-25).
• 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).
• 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
4.1 Important information
Please follow these instructions. Failure to follow instructions
may result in:
• Damage or injury.
• Improper installation/operation.
• Loss of warranty.
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.
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:
▶ The installation must only be performed
by a qualified person in accordance with
these instructions.
▶ Bosch Thermotechnology Corp. is not
responsible for improperly installed
appliances.
WARNING:
▶ The heater must only be wall mounted
and positioned with the water
connections located either at bottom or
the right side of the unit see Fig. 6.
Under no circumstances should the
heater be mounted differently.
6 720 647 005 (2014/04)TRONIC 3000C Pro
Installation | 9
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
be installed with service 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.
▶ 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 a sink, we recommend that you use
aerators, which you can get from your local distributor/
dealer.
▶ If the unit is to supply more than one sink, the aerator
should be the same at each tap if they are to be used at the
same time. If not, one outlet will take all the water.
▶ 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.
WARNING:
▶ ELECTRICITY IS EXTREMELY
DANGEROUS. TAKE EXTRA
PRECAUTIONS AND ENSURE ALL
CIRCUIT BREAKERS ARE OFF BEFORE
PERFORMING ANY WORK TO THE
HEATER.
Use of agents like anti-freeze are not allowed
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.
As a condition of installing this product in the
Commonwealth of Massachusetts a
pressure relief valve must be installed on the
cold water side by a licensed plumber. MGL
42 Section 19.
Approval number: P1-09-25
6 720 647 005 (2014/04) TRONIC 3000C Pro
10 | Installation
4.3.1 Water quality
Water quality can have an impact on appliance longevity and
may not be covered under the manufacturer's warranty.
▶ For water analysis data call your local water department, or
if on a well, have well water analyzed periodically.
If water quality exceeds one or more of the values specified
below, Bosch recommends consulting a local water
treatment professional for water softening/conditioning
options.
4.4 Electrical connections
Connecting the unit to power
▶ Strip back the insulation on the power wires about
3/8". Any insulation on the ground should be stripped back
about 3/4".
▶ Feed the cable through the cover bottom or backplate rear
entry grommets, as appropriate.
▶ Connect the cables to the terminal block and ground stud
(Fig. 4 ):
Fig. 4 Cable termination
[1] Ground
[2] Rubber sleeve
▶ Make sure that all the terminal block screws are tightened
securely. Loose connections can cause wires to heat up.
▶ Make sure that the ground wire is wrapped around its
terminal stud and into the saddle washer. The nut should be
tightened securely.
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 5
WARNING:
▶ The unit must be installed by a qualified
electrician.
▶ The unit must be grounded.
▶ Connect the unit to power.
Model
Rated Voltage
(V)
Rated Current
(A)
Recommend
Wire Size (AWG)
US3 110 30 10
US6 277 25 10
US7 240 30 10
US9 208 35 8
US9 240 40 8
Table 6
NOTICE:
When the Tronic 3000C Pro 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)
6 720 647 005 (2014/04)TRONIC 3000C Pro
Installation | 11
▶ Set the Power Selector Screw (Fig. 5 ) on the desired
setting. If it is set to LO, only one heating element will
operate and the output will be half power. See the Table
4 on page 7 for temperature rise at various flow rates. If
the element is set on HI, both heating elements will operate
and the output will be full power. When setting the Power
Selector Screw, it is important that the screw be adjusted
all the way to the end of the slot and that it be well
tightened.
Fig. 5 Power selector screw
▶ Attach the front cover and tighten the retaining screws.
4.5 Securing the unit to the wall
4.5.1 Deciding the position
▶ If being used in a public place, position the unit out of reach
to discourage vandalism.
▶ Mount the unit onto a flat section of wall, well away from
any potential splashes of water or spray.
▶ Mount only as shown in Fig. 6, Fig. 7 and Fig. 8 with the
water connections located either at the right side, left side
or bottom of the unit.
Remember to keep the lengths of hot water pipe to a
minimum in order to save energy.
▶ If the unit is to supply a sink, you can fit it either above or
below the sink.
Fig. 6 Example of installation (front view)
[1] Hot water
[2] Cold water
Fig. 7 Example of installation (front view)
[1] Hot water
[2] Cold water
6 720 647 005 (2014/04) TRONIC 3000C Pro
12 | Starting up the Tronic 3000C Pro
Fig. 8 Example of installation (front view)
[1] Hot water
[2] Cold 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. 9 ):
Fig. 9 Cover lug cut out
▶ If it is going through the back of the 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. 10 ):
Fig. 10 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 backdate 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
5.1 Sink
WARNING:
▶ Do not install a non-return check valve
within 6 feet of the inlet.
WARNING:
▶ Do not use the unit if you think it may be
frozen, as this could result in serious
damage to the unit. Wait until you are
sure it has completely thawed out
before you switch it on.
WARNING:
Before turning on power:
▶ Open cold water shutoff valve to the unit
and turn on all hot water taps supplied
by the unit. Flow water out the tap(s)
until all air has purged from the unit and
plumbing.
1
2
6720646914-07.1V
6 720 647 005 (2014/04)TRONIC 3000C Pro
Troubleshooting | 13
▶ Check that the power is switched on at the circuit breaker
panel.
▶ Turn on the hot tap FULLY.
If you do not turn the tap full on, you will find that the
temperature of the water may vary. The hot water
temperature can then be set by adjusting the flow.
If the unit has been used recently:
▶ run the water through for a few seconds to let the
temperature settle down.
If the unit has been used recently, You may initially get a
short burst of very hot water from the unit.
If a second tap connected to the unit is also turned on, the hot
water will be shared between the two, therefore the flow and/
or the temperature of the water will decrease.
5.2 Adjusting the flow
Checking for leaks
▶ Ensure the service valves are open and check that no pipe
joints leak.
▶ Turn on the hot tap fully at the sink.
▶ Adjust the outlet service valve until the water comes out of
the tap at the required temperature, (increase flow for
cooler, decrease for hotter). Refer to Table 4 , page 7
for expected temperature rise at given flow rates.
▶ Check that the unit works correctly when the sink tap is
closed and then opened again; if not adjust the service
valve slightly.
▶ The inlet service valve should not be used to regulate
temperature.
6 Troubleshooting
If the problem persists:
The person who initially installed the unit is probably the best
one to contact for help. You can also call Bosch
Thermotechnology Corporation at 603-552-1100 or visit
www.bosch-climate.us. Please have this guide with you when
you call.
When using the hot water at a fixture, open
tap fully. To regulate hot water temperature,
adjust water flow accordingly as directed in
Section 5.2.
NOTICE:
If the unit is servicing a single lever faucet
you may need to restrict the cold water
supply to the faucet to balance water
pressure and improve performance.
NOTICE:
▶ Before leaving the site, the installer
should demonstrate the unit to the user
and give him/her this guide.
WARNING: Always switch off the electricity
supply to the unit before you remove the
cover.
6 720 647 005 (2014/04) TRONIC 3000C Pro
14 | Troubleshooting
6.1 For the Installer
6.2 For the User
Symptom Cause What to do
Cold water only -neon
light off.
Electricity not on. Check electrical supply.
The water supply is connected to
the OUTLET of the unit.
Reconnect the water supply to the INLET (marked in blue).
The high temperature thermal cut
out has tripped.
Reset it by opening the unit and pushing the button on the cut out
(Fig. 3 ). Before you do this you must find the cause of the
problem.
The flow switch is not working.
Turn off the power and observe if the flow switch activates when the
water is turned on.
If not contact Bosch Thermotechnology 603-552-1100 www.boschclimate.us
Water too cold -neon
light on.
Water flow too high. Adjust water flow (see Table 4 ).
The power selector screw not all
the way to “HI”.
Change the power select screw to “HI”, see Fig. 5 .
One element is not working.
Switch off the electricity and check the resistance of the elements
(see Table 4 ).
The power supply voltage has
dropped.
Check the supply voltage to the heater (see Table 4 ).
Water flow too low, or
temperature too high.
There are restrictions in the
plumbing.
Check the plumbing. Only use Teflon tape for sealing pipe joints.
Table 7
Symptom Cause What to do
Little or no water
flows.
The water supply is turned off. Turn on the main supply fully at the stop valve.
Cold water only neon light off.
The flow is not high enough to
activate.
Open the inlet service valve fully.
Water too cold neon light on.
The water flow rate is too high. Adjust the flow rate with hot water outlet service valve.
The inlet water temperature has
dropped.
Adjust the flow rate with hot water outlet service valve.
Water flow rate
too low, or
temperature too
high.
The main supply of water flow is too
low.
Increase the water flow.
The hot tap is not fully open. Adjust the stop/ball valve so that water is at the right temperature
with the tap fully open (see section 5.2). Always turn the hot tap
full on.
Table 8
6 720 647 005 (2014/04)TRONIC 3000C Pro
Troubleshooting | 15
Water
temperature
fluctuates.
Fluctuating water pressure and/or
flow is causing the flow switch to cycle
on and off.
Increase the flow rate.
Be sure that the isolation valves are properly adjusted.
Be sure that the inlet filter screen is clean.
Be sure that the outlet restrictors and aeratots on showers and/or
faucets are clear.
Be sure that there is no plumbing crossover by shutting off the inlet
isolation valve and opening an hot water outlets served by the Tronic
3000C Pro. If there is a steady flow, then cold water is flowing into
hot water service lines and back-pressuring the Tronic 3000C Pro.
This condition must be fixed or the heater wil not work properly.
Symptom Cause What to do
Table 8
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