Bosch WH36 Technical Document

[en] Installation Manual and Operating Instructions 2

[es] Instrucciones de instalación y funcionamiento 21

[fr] Instructions d'installation et d'utilisation 41

Tankless Electric Water Heaters

TRONIC 5000C Pro

6720647022-00.1V

WH36

6 720 647 022 (2013/04) 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: 800-798-8161

www.bosch-climate.us

6 720 647 022 (2013/04) Tronic 5000C

2 | Table of contents

Table of contents

1 Key to symbols and safety instructions . . . . . . . . . . 2

1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2 Safety precautions . . . . . . . . . . . . . . . . . . . . 3

2 Information about the heater . . . . . . . . . . . . . . . . . . . 3

2.1 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.2 Technical identification code . . . . . . . . . . . . 3

2.3 Model name and number identification . . . . 3

2.4 Package contents . . . . . . . . . . . . . . . . . . . . . 3

2.5 Components Diagram . . . . . . . . . . . . . . . . . . 4

2.6 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.7 Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . 6

2.8 Description of the heater . . . . . . . . . . . . . . . 6

2.9 Technical specifications . . . . . . . . . . . . . . . . 7

3 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.1 Important information . . . . . . . . . . . . . . . . . . 8

4.2 Selection of place of installation . . . . . . . . . . 8

4.3 Mounting the water heater . . . . . . . . . . . . . . 9

4.4 Water connections . . . . . . . . . . . . . . . . . . . 10

4.5 Electrical connections . . . . . . . . . . . . . . . . . 10

4.6 Starting up . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5 Operation instructions . . . . . . . . . . . . . . . . . . . . . . . 14

5.1 Before using the water heater . . . . . . . . . . 14

6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

8 Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1 Key to symbols and safety

instructions

1.1 Key to symbols

Warnings

The following keywords are defined and can be used in this

document:

•NOTICEindicatesasituationthatcould 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

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

ifmeasurestopreventtherisk are nottaken.

Thissymbolindicatesimportant 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

6 720 647 022 (2013/04)Tronic 5000C

Information about the heater | 3

1.2 Safety precautions

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: Mount the unit onto a flat section of wall, well

away from any potential splashes of water or spray and

away from areas where direct moist or wet contact could

occur.

▶ Warning: Indoor installation only, where it will NOT be

exposed to freezing.

▶ Warning: Do not install a check valve or any other type of

back flow preventer within ten 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 aresurethat ithas completely

thawed out.

▶ The Tronic 5000C Pro is designed to heat potable cold

waterfordomesticpurposes.Theheaterisnotdesignedto

accept inlet water temperatures above 86° F. Contact

Bosch Thermotechnology Corp. before specifying or

installing the appliance in any other application.

▶ Warning: Any water heater should be installed in such a

manner that if it should leak, the resulting flow of water will

not cause damage to the area in which it is installed.

National Plumbing codes require a drain pan for any water

heater installation. Failure to install one is the sole

responsibility of owner and/or installer. Reference UPC

2000 (Uniform Plumbing Code) Section 510 - Protection

from Damage or IPC 200 (International Plumbing Code)

Section 504- Safety Devices.

▶ Additional Canadian safety instructions:

– AspertheCanadianElectricalCode,C22.1-02Section

26-744, an auxiliary terminal block must be fitted to

the unit before connecting to the electrical supply (Kit

Part N° “AE Canada Kit”) (See page 10).

– A green terminal (or a wire connector marked “G,”

“GR,” “GROUND” or “GROUNDING”) is provided within

the control. 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.

▶ Keep this manual in a safe place once the unit has been

installed as it may be needed for future reference.

2 Information about the heater

2.1 Disclaimer

2.1.1 Approval number

Commonwealth of Massachusetts

In the Commonwealth of Massachusetts a licensed plumber or

electrician must perform the installation. (Approval number:

P1-09-25).

2.2 Technical identification code

[EI] Electronic Instantaneous

[36] Maximum output (kW)

[E] Electronic temperature control

[W] Wall hung

[I] Indoor

[H] Horizontal installation

[B] Water connections

2.3 Model name and number identification

2.4 Package contents

• Tankless electric water heater

• 4 screws and gaskets

EI 36 EWIHB

Table 2

Model Name Model Number

WH36 EI 36 E/M W I H B

Table 3

6 720 647 022 (2013/04) Tronic 5000C

4 | Information about the heater

2.5 Components Diagram

Fig. 1

[A] Heating module

[B] Heating element assembly

[C] Heating module PCB

[D] Hot water outlet

[E] Cold water inlet

[F] Temperature adjustment knob

[G] Flow transducer

[H] Terminal block (CANADA ONLY)

[I] 6 way terminal block

[J] Temperature sensor

[K] Control PCB

[L] Double pole thermal cut-out

[M] Inlet water filter

[N] Flow regulator

6720647022-01.1V

F K

6 720 647 022 (2013/04)Tronic 5000C

Information about the heater | 5

2.6 Dimensions

Fig. 2

[1] Outlet ¾ " NPT (hot water)

[2] Temperature knob

[3] LED

[4] Inlet ¾ " NPT (cold water)

Dimensions

(inches) WH36

A (Width) 20 "

B (Height) 12½ "

C (Depth) 4½ "

D 17 5/8"

E 17 5/8"

5/8"

G 3 3/8"

H 11 1/8"

5/8"

7/8"

Water connections ¾ "

Table 4 Dimensions

6 720 647 022 (2013/04) Tronic 5000C

6 | Information about the heater

2.7 Wiring diagram

Fig. 3 Internal wiring schematic for single phase WH36 unit.

2.8 Description of the heater

How the Tronic 5000C Pro works;

• The Tronic 5000C Pro heats water continuously as it flows

through the heater modules.

• The electronic control PCB monitors the flow rate and the

incoming water temperature and then switches on the

required number of heater elements to reach the

temperature set by the temperature adjustment dial.

• As the flow rate or the incoming water temperature

changes, the electronic control adjusts the number of

heater elements used so that the outlet temperature is

maintained.

• The outlet water temperature can change slightly as the

flow rate changes due to the steps in power as different

heater elements are switched on and off.

• The outlet water temperature can also vary if the maximum

flow rate is exceeded (see Fig. 8) or if the supply voltage

changes.

• Each heater module is protected by an electro-mechanical

thermal cut-out. If the temperature of any of the heater

modules gets too high, then the cut-out will trip and cut the

power to that heater module. If the cut-out trips, it must be

reset while the circuit breakers are off. If you are not

comfortable or qualified to perform this task, consult the

original installer or a licensed electrician. This cut-out will

only trip in exceptional circumstances.

• Dependingon theregionof thecountry,the temperatureof

thewatersupplycan varybetween 40°Fin winterto 80°Fin

summer, with an average of 55°F. The output temperature

at maximum flow of the heater is dependent on inlet water

temperature.

DANGER: Risk of electric shock!

▶ Always switch off the electricity supply to the unit before any

intervention in the heater.

6 720 647 022 (2013/04)Tronic 5000C

Regulations | 7

2.9 Technical specifications

3 Regulations

Any local by-laws and regulations pertaining to installation and

use of electric water heating appliances must be observed.

Please refer to the laws that should be attended in your

country.

• Theelectricalinstallation must conform to current National

Electrical Codes.

• Asper the CanadianElectricalCode, C22.1-02 Section26-

744, an auxiliary terminal block must be fitted to the unit

before connecting to the electrical supply.

• A green terminal (or wire connection marked “G”, “GR”,

“GROUND” or “GROUNDING”) is provided within the

control box. Aditional Canadian safety instructions, 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.

• In Canada, 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.

Technical characteristics Units WH36

Voltage supply V 3 X 240 (Canada 240VAC)

Amperage A 3 x 60A (Canada 180A)

Maximum output kW 36.0kW

Temperature control range 95 °F to 131 °F

Minimum water pressure psi 15psi

Maximum water pressure psi 150psi

Minimum flow rate gal/min 0.8 US gal / min

Maximum flow rate (refer to Fig. 8)

Weight (without water) lbs 26.5 lbs

The unit will work at lower supply voltages but the following changes will apply:

Maximum output 30.2kW at 220V

27.0kW at 208V

Temperature control range 87 °F to 116 °F at 220V

82 °F to 108 °F at 208V

Maximum power

(refer to Fig. 8)

84% of maximum at 220V

75% of maximum at 208V

Table 5

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.

6 720 647 022 (2013/04) Tronic 5000C

8 | Installation

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.

4.2 Selection of place of installation

• If being used in a public place, locate the heater out of easy

reach to discourage vandalism.

• Mount the unit onto a flat section of wall, well away from

any potential splashes of water or spray and away from

areas where direct moist or wet contact could occur.

• Install the heater in a place that provides easy access for

any service or maintenance.

4.2.1 Freeze prevention

Introduction

Please note 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. See Section 6.

Freeze damage is not covered under the warranty.

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

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:

▶ The appliance should be located in an

area where leakage of the heater or

connections will not result in damage to

the area adjacent to the appliance or to

lower floors of the structure.

WARNING: Risk of freezing!

▶ Donot installthewater heaterin an area

where there is a chance of freezing.

Damage to the water heater as a result

of freezing will not be covered under

warranty.

WARNING:

▶ ELECTRICITY IS EXTREMELY

DANGEROUS. TAKE EXTRA

PRECAUTIONS AND ENSURE ALL

CIRCUIT BREAKERS ARE OFF BEFORE

PERFORMING ANY WORK TO THE

HEATER.

WARNING:

▶ Indoor installation only, where it will

NOT be exposed to freezing.

Use of chemical agents such as anti-freeze

arenotallowedastheymaycausedamageto

the water heater’s internal components.

6 720 647 022 (2013/04)Tronic 5000C

Installation | 9

4.2.2 Recomended minimum clearances for servicing

Should it be necessary to service the Tronic 5000C Pro,

observe the following clearances. These are not required

clearances, but would facilitate any service work.

Fig. 4 Recommended minimum clearances

4.3 Mounting the water heater

▶ Undo the retaining screws on the front cover and take the

cover off the heater. Hold the back plate in position against

the wall and mark the four mounting holes.

▶ Drill the holes and secure the heater using the four wood

screws supplied.

Fig. 5 Vertical mounting position

WH36

Top (A) 12”

Sides 0”

Bottom (B) 6”

Front (C) 12”

Table 6 Recommended minimum clearances

WARNING:

▶ The heater must only be installed in the

orientationshowninFig. 5i.e.,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.

6 720 647 022 (2013/04) Tronic 5000C

10 | Installation

4.4 Water connections

▶ The heater must be connected directly to the main cold

water supply and not to pre-heated water. (The inlet

water temperature must not be greater than 86 °F).

▶ Theheatermustbeinstalled withshutoff valvesonboththe

inlet and outlet connections.

▶ It is recommended that you use ¾ inch or ½ inch copper or

high-pressure flex connections.

▶ Do not use plastic piping within 3 feet on either side of

heater.

▶ Use Teflon tape for sealing pipe threads. Do NOT use pipe

dope.

▶ Remember to keep the hot water pipe runs as short as

possible.

After the heater has been plumbed, and before you wire it,

flush it with water to remove any debris or loose particles.

Heater must be full of water and air purged before power is

turned on. Failure to do so may result in damage to the

product that is not covered by warranty.

▶ After flushing and filling the heater with water, (with power

off) disconnect the inlet connection and inspect the filter

screen for any debris that may have been flushed through

the system.

▶ Check the pressure of the main water supply. To operate

correctly, the heater needs the running pressures

mentioned in 5.

4.4.1 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.

4.5 Electrical connections

WARNING:

▶ Do not install a non-return check valve

within 10 feet of the inlet.

WARNING:

▶ Do not apply heat or solder to

connections or pipe if they are already

connected to the unit.

NOTICE: Disclaimer

▶ Inthe Commonwealth ofMassachusetts

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 inlet and outlet connections are clearly

marked on the heater. They each have a

¾ inch NPT connector.

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 7

WARNING:

▶ The unit must be wired by a qualified

electrician, in accordance with the

currentversion of theNationalElectrical

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.).

This manual suits for next models

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