Bosch TRONIC 5000C Pro Technical Document

en Installation Manual and Operating Instructions 2

es Instrucciones de instalación y funcionamiento 28

fr Instructions d'installation et d'utilisation 54

PRO tankless electric water heaters

TRONIC 5000C Pro

6720646951-00.1V

Models: WH17 / WH27

6 720 646 951 (2011/09) 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

2| Table of contents US

Copyright6 720 646 951 (2011/09)

Table of contents

1 Explanation of symbols and safety information . 3

1.1 Explanation of symbols . . . . . . . . . . . . . . . . 3

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

2 General information . . . . . . . . . . . . . . . . . . . . . . . 5

2.1 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1.1 Approval number . . . . . . . . . . . . . . . . . . . . 5

2.2 Technical identification code . . . . . . . . . . . 5

2.3 Model name and number identification . . . 5

2.4 Package contents . . . . . . . . . . . . . . . . . . . . 5

2.5 Components Diagram . . . . . . . . . . . . . . . . . 6

2.6 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.7 Wiring diagram . . . . . . . . . . . . . . . . . . . . . . 8

2.8 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.9 Technical specifications . . . . . . . . . . . . . . 10

3 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.1 Important information . . . . . . . . . . . . . . . 12

4.2 Selection of place of installation . . . . . . . 12

4.2.1 Freeze prevention . . . . . . . . . . . . . . . . . . . 12

4.2.2 Recommended minimum clearances

for servicing . . . . . . . . . . . . . . . . . . . . . . . 13

4.3 Mounting the water heater . . . . . . . . . . . . 13

4.4 Water connections . . . . . . . . . . . . . . . . . . 14

4.4.1 Water quality . . . . . . . . . . . . . . . . . . . . . . . 14

4.5 Electrical connections . . . . . . . . . . . . . . . 14

4.6 Starting up . . . . . . . . . . . . . . . . . . . . . . . . 18

4.6.1 Checking for leaks and purging air . . . . . . 18

4.6.2 Adjusting the temperature dial . . . . . . . . . 18

4.6.3 Adjusting the flow . . . . . . . . . . . . . . . . . . . 18

5 Operation instructions . . . . . . . . . . . . . . . . . . . . 19

5.1 Before using the water heater . . . . . . . . . 19

6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 22

8 Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Explanation of symbols and safety information | 3US

6 720 646 951 (2011/09)Copyright

1 Explanation of symbols and safety information

1.1 Explanation of symbols

Warnings

Signal words at the beginning of a warning are used to

indicate the type and seriousness of the ensuing risk if

measures for minimizing damage are not taken.

•NOTE indicates possible minor to medium personal

injury.

•CAUTION indicates possible minor to medium

personal injury.

•WARNING indicates possible severe personal injury.

•DANGER indicates that severe personal injury may

occur.

Important information

Additional symbols

1.2 Safety precautions

When using this electrical equipment, basic safety

precautions should always be followed, including the

following:

BREAD AND FOLLOW ALL INSTRUCTIONS.

BThis appliance must be grounded.

BDisconnect this product from the electrical supply

before cleaning, servicing or removing the cover.

BTo reduce the risk of injury, close supervision is

necessary when the product is used near children or

elderly persons.

BWarning: 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.

BWarning: Indoor installation only, where it will NOT be

exposed to freezing.

BWarning: Do not install a check valve or any other type

of back flow preventer within ten feet of the cold

water inlet.

BThe electrical installation must conform to current

National Electrical Codes.

BWarning: Do not switch the heater on if you suspect

that it may be frozen. Wait until you are sure that it

has completely thawed out.

BThe Tronic 5000C Pro is designed to heat potable cold

water for domestic purposes. The heater is not

designed to accept inlet water temperatures above

86° F. Contact Bosch Thermotechnology Corp. before

specifying or installing the appliance in any other

application.

Warnings are indicated in the text by a

warning triangle and a gray background.

In case of danger due to electric shock, the

exclamation point on the warning triangle is

replaced with a lightning symbol.

Important information that presents no risk

to people or property is indicated with this

symbol. It is separated by horizontal lines

above and below the text.

Symbol Meaning

Ba step in an action sequence

→a reference to a related part in the

document or to other related documents

•a list entry

–a list entry (second level)

Tab. 1

4| Explanation of symbols and safety information US

Copyright6 720 646 951 (2011/09)

BAdditional Canadian safety instructions:

–As per the Canadian Electrical Code, C22.1-02

Section 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 17).

–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.

BKeep this manual in a safe place once the unit has

been installed as it may be needed for future

reference.

General information | 5US

6 720 646 951 (2011/09)Copyright

2 General information

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

17 Maximum output (kW)

E/M Electronic / mechanical temperature control

WWall hung

IIndoor

HHorizontal installation

BWater connections

2.3 Model name and number

identification

2.4 Package contents

•Tankless electric water heater.

•4 screws and gasket.

EI 17 E/M W I H B

EI 27 E/M W I H B

Tab. 2

Model Name Model Number

WH17 EI 17 E/M W I H B

WH27 EI 27 E/M W I H B

Tab. 3

6| General information US

Copyright6 720 646 951 (2011/09)

2.5 Components Diagram

Fig. 1

AHeating module

BHeating element assembly

CHeating module PCB

DHot water outlet

ECold water inlet

FTemperature adjustment knob

GFlow transducer

HTerminal block (CANADA ONLY)

I6 way terminal block

JTemperature sensor

KControl PCB

LDouble pole thermal cut-out

MInlet water filter

NFlow regulator

6720646951-14.1V

MF K

General information | 7US

6 720 646 951 (2011/09)Copyright

2.6 Dimensions

Fig. 2

1Outlet ¾

NPT (hot water)

2Inlet ¾

NPT (cold water)

3Temperature knob

4LED

Dimensions

(inches) WH17 / WH27

A (Width) 15 ¼ "

B (Height) 12 ½ "

C (Depth) 4 ½ "

D12

E12

F2 ½ "

G3 ½ "

I5 ¾ "

J1 ¾ "

Water connections ¾ "

Tab. 4 Dimensions

8| General information US

Copyright6 720 646 951 (2011/09)

2.7 Wiring diagram

Fig. 3 Internal wiring schematic for single phase WH27 unit.

DANGER: Risk of electric shock!

BAlways switch off the electricity supply to

the unit before any intervention in the

heater.

6720646951-02.1V

General information | 9US

6 720 646 951 (2011/09)Copyright

Fig. 4 Internal wiring schematic for single phase WH17 unit.

2.8 Function

How the water heater 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. 11) or if the

supply voltage changes.

•Each heater module is protected by an electro-

mechanical thermal cut-out. This cut-out will only trip

in exceptional circumstances.

Contact Technical Support 800-798-8161 for further

instruction.

•The WH17 unit is supplied from two independent

voltage supplies and the WH27 unit from three

independent voltage supplies. (In Canada the unit has

just one voltage supply).

•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

55 °F. The output temperature and maximum flow of

the heater is dependent on inlet water temperature.

6720646951-03.1V

10 | General information US

Copyright6 720 646 951 (2011/09)

2.9 Technical specifications

Technical characteristics Units WH17 WH27

Voltage supply V 2 X 240VAC (Canada 240VAC) 3 X 240VAC (Canada 240VAC)

Amperage A 2 X 40A (Canada 80A) 3 X 40A (Canada 120A)

Maximum output kW 17.25kW 26.85kW

Temperature control range 95 °F to 131 °F 95 °F to 131 °F

Minimum water pressure psi 15psi 15psi

Maximum water pressure psi 150psi 150psi

Minimum flow rate gal/min 0.6 US gal / min 0.8 US gal / min

Maximum flow rate (refer to Fig. 11) (refer to Fig. 11)

Weight (without water) lbs 20 lbs 22 lbs

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

Maximum output 15kW at 220V 22.5kW at 220V

13kW at 208V 20kW at 208V

Maximum flow rate

(refer to Fig. 11)

84% of maximum at 220V 84% of maximum at 220V

75% of maximum at 208V 75% of maximum at 208V

Tab. 5

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