Bosch TRONIC 3000C Pro US7 Technical Document

[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:

•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

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:Donotinstalltheheaterin a location whereitmay

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.

▶ Theelectricalinstallation must conform to current National

Electrical Codes.

▶ Warning: Do not switch the heater on if you suspect that it

maybe frozen.Wait untilyou aresurethatithas 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

• 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.

▶ Youmay need to refer to itforgeneral 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

ifmeasures to preventtherisk are nottaken.

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!

▶ Alwaysswitch offtheelectrical 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

heatingelementsswitchon.Thisisshownbytheneonlight

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.

• Dependingon theregionof thecountry,the temperatureof

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.

• Theelectricalinstallation must conform to current National

Electrical Codes.

• Toreducetheriskof 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

maycontainsuchsubstances,betheirorigin

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

bya qualified person in accordancewith

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

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.

▶ 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.

Useofagentslike 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.

Asaconditionof installingthisproductinthe

Commonwealth of Massachusetts a

pressurerelief valve mustbeinstalled 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.

▶ Forwater analysis data callyourlocal water department, or

if on a well, have well water analyzed periodically.

Ifwaterqualityexceedsone 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".Anyinsulation 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

terminalstudandintothesaddlewasher.Thenutshouldbe

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)

RatedCurrent

(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

meansofdisconnectionfor allnongrounded

conductors must be provided that is within

sight of the appliance. (REF NEC 422.31)

Table of contents

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