Bosch ES4, ES8 Installation Manual

Tronic 3000T

ES 2.5/4/8...

Use this manual for installations in the United States of America: Utilice este manual para las instalaciones en los Estados Unidos de América:

[3] Installation Manual and Operating Instructions [14] Instrucciones de Instalación y Funcionamiento

6 720 801 072 (2013/05) US

2 | Table of contents

1 Explanation of symbols and safety information . . . . . . . . . . . . 3

1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Information about the product . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Models overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.3 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1 Mounting the heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.2 Pipe connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.3 Closed system thermal expansion . . . . . . . . . . . . . . . . . . 7

3.4 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.1 Starting and testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.2 Temperature setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.1 Removing the cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.2 Draining the heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.3 Inspecting the anode rod . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.4 Removing the heating element . . . . . . . . . . . . . . . . . . . . . 9

5.5 Descaling the heating element . . . . . . . . . . . . . . . . . . . 10

6 Replacement of parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6.1 Changing the anode rod . . . . . . . . . . . . . . . . . . . . . . . . 10

6.2 Changing the heating element . . . . . . . . . . . . . . . . . . . 10

6.3 Changing the thermostat . . . . . . . . . . . . . . . . . . . . . . . 10

7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7.1 Resetting High Limit Switch . . . . . . . . . . . . . . . . . . . . . 11

8 Bosch interior components diagram . . . . . . . . . . . . . . . . . . . 12

9 Bosch Tronic 3000T

LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Tronic 3000T6 720 801 072 (2013/05)

1 Explanation of symbols and safety

information

1.1 Key to symbols

Warnings

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.

The following keywords are defined and can be used in this document:

• NOTICE indicates that damage to property may occur.

• CAUTION indicates that personal injury may occur.

• WARNING indicates that severe personal injury may occur.

• DANGER indicates that severe personal injury or death may occur.

Important information

This symbol indicates important information where there is no risk to people or property.

Additional symbols

Symbol Explanation

▶ Step in an action sequence  Cross-reference to another part of the document

• List entry – List entry (second level)

Table 1

Explanation of symbols and safety information | 3

1.2 Safety information

CAUTION:

When using electrical appliances, safety precautions to reduce the risk of fire, electric shock or injury to persons should be followed, including:

▶ READ ALL INSTRUCTIONS BEFORE USING THIS WATER HEATER. ▶ This water heater must be grounded. Connect only to properly

grounded outlet. See “GROUNDING INSTRUCTIONS” found on “INSTALLATION INSTRUCTIONS”.

▶ Install or locate this water heater only in accordance with the

provided installation instructions.

▶ Use this water heater only for its intended use as described in this

manual.

▶ The models ES2.5 and ES4 come equipped with a power cord. Do

not use an extension cord. If no outlet is available adjacent to the water heater, contact a qualified electrician to have one properly installed near the heater. The model ES8 must be hard-wired. See installation instructions.

▶ As with any appliance, close supervision is necessary when used by

children.

▶ Do not operate this water heater if it is has a damaged cord or plug, if

it is not working properly, or if it has been damaged or dropped.

▶ This water heater should be serviced only by qualified service

personnel. Contact a service person for examination, repair or adjustment.

▶ Failure to inspect the anode rod at least once a year could cause the

tank to fail and leak. This condition is not covered under the manufacturer's warranty.

▶ 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 2006 (Uniform Plumbing Code) Section 508.1, or IPC 2006 (International Plumbing Code) Section 504.7.

NOTICE:

The installer should review the contents of this manual with the owner upon completion of installation, and the manual should be left with the owner and placed in a location close to the installation.

NOTICE:

The manufacturer cannot be responsible for the damages caused by improper installation or by failure to follow instructions in this manual. Comply with the installation instructions before completing electric connection.

NOTICE:

The thermostat has been pre-set at the factory at a temperature equal or below 51.7 °C (125 °F) ( Fig. 1).

6 720 801 072 (2013/05)Tronic 3000T

4 | Information about the product

MAX

MIN

OFF

IDEAL

6720801072-07.1V

MAX

E A

6720801072-01.1V

MAX

6720801072-02.1V

Fig. 1

DANGER:

Hydrogen gas can be produced in a hot water system served by this heater that has not been used for a long period of time (generally 2 weeks or more). Hydrogen gas is extremely flammable. To reduce the risk of injury under these conditions, it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system. If hydrogen gas is present, there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow. There should be no smoking or open flame near the faucet at the time it is open.

CAUTION:

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 2006 (Uniform Plumbing Code) Section 508.1, or IPC 2006 (International Plumbing Code) Section 504.7.

2 Information about the product

2.1 Models overview

Models ES2.5 and ES4

Fig. 2

[1] Temperature & pressure relief valve, ¾ NPT male [2] Cold water inlet ½ NPT male [3] Thermostat [4] Temperature & pressure relief valve discharge line to drain [5] ¾ NPT female tapping for relief valve [6] Hot water outlet ½ NPT male

Models ES8 (Horizontal installation)

CAUTION:

Prior to connecting the power supply, ensure tank is full of water and system is purged of air.

NOTICE:

Tank failure due to neglecting to maintain the anode rod is not covered under warranty (see Section 5 Maintenance).

Fig. 3

[1] Temperature & pressure relief valve, ¾ NPT male [2] Cold water inlet ¾ NPT male [3] Thermostat [4] Temperature & pressure relief valve discharge line to drain [5] ¾ NPT female tapping for relief valve [6] Hot water outlet ¾ NPT male [7] ¾ NPT male plug [8] ¾ NPT female tapping for tap

Tronic 3000T6 720 801 072 (2013/05)

Models ES8 (Vertical installation)

6720801072-03.1V

M A

IDEAL

10 ¾”

6¼”

3½”

13 ½”

9”

3½”

2½”2 ½”

3¾”

13 ¾”

½ NPT male

13 ¾”

5”

1”

6720801072-04.1V

ES2.5 ES4

Fig. 4

Information about the product | 5

2.2 Dimensions

Models ES2.5 and ES4 (Vertical installation only)

Fig. 5

6 720 801 072 (2013/05)Tronic 3000T

6 | Information about the product

14 ½”

4½”

8½”

6720801072-06.1V

17.6”

A X

17.6”

1”

11.4”

¾ NPT MALE

2½”

6½”

14 ½”

4½”

8½”

17.6”

6720801072-05.1V

MAX

3”

11.4”

¾ NPT MALE”

1”

Models ES8 (Vertical installation)

Fig. 6

Models ES8 (Horizontal installation)

Fig. 7

2.3 Technical data

Technical data Units ES 2.5 ES 4 ES 8

Capacity gallons 2.7 4.0 7.0 (Vert) / 5.1 (Hor)

Voltage VAC 110/120 for each model Power at 120 VAC Watts 1440

Maximum water pressure psi 150 Weight (empty) Lbs 15.5 17.3 29.5

Amperage Amps Phases

Temperature range °F Recovery rate gallons/hour

Table 2

12.0 for each model

65 - 145

6.8

Tronic 3000T6 720 801 072 (2013/05)

3 Installation instructions

The ES2.5 and ES4 water heaters are designed to be installed under the sink.

3.1 Mounting the heater

3.1.1 Wall mounting

▶ Fasten the supplied mounting bracket to the wall.

NOTICE: Material damages! Use screws that are suitable for the wall material and the

weight of the heater.

▶ Hang the water heater on the bracket. ▶ Tug down wards on the heater to ensure that both “fingers”of the

bracket are seated in the mounting slots.

3.1.2 Floor mounting

▶ Heater can sit on floor.

3.2 Pipe connections

▶ Connect the cold water inlet pipe to the inlet tapping (marked with a

blue ring).

▶ Ensure a isolation valve is installed on the cold water supply to the

water heater.

▶ Connect the hot water outlet pipe to the outlet tapping (marked with

a red ring).

The model ES8 can be piped horizontally from the side or vertically from the top.

Installation instructions | 7

The supplied temperature and pressure relief valve is marked with a maximum set pressure (150 psi) that does not exceed the marked maximum working pressure of the water heater.

▶ Install the valve in the opening provided and marked for this purpose

in the water heater.

▶ Orient it or provide tubing so that any discharge from the valve will

exit within 6 inches above, or at any distance below, the structural floor, and cannot contact any live electrical part. The discharge opening must not be blocked or reduced in size under any circumstances.

National Plumbing codes may require a drain pan for the water heater installation. Failure to install one is the sole responsibility of owner and/ or installer. Reference UPC (Uniform Plumbing Code), or IPC (International Plumbing Code).

3.3 Closed system thermal expansion

Periodic discharge of the temperature and pressure relief valve or failure of the element gasket may be due to thermal expansion in a closed water supply system. The water utility supply meter may contain a checkvalve, backflow preventer or waterpressure reducing valve which will create a closed water system.

During the heating cycle of the water heater, the water expands causing pressure inside the water heater to increase. The temperature and pressure relief valve may discharge hot water under these conditions which results in a loss of energy and a build-up of lime on the relief valve seat.

To prevent this from happening, there are two recommendations:

1. Install a diaphragm-type expansion tank that is suitable for potable water on the cold water supply line. A minimum 0.5 gallon expansion tank should be used.

Contact the local water supplier or plumbing inspector for information on how to control this situation. Do not plug the temperature and pressure relief valve.

Horizontal installation - ES8 Model Only

If you wish to install the unit horizontally, with the piping connections on the right side: ▶ Install supplied brass plug into tap between hot and cold water

connections.

▶ The supplied Temperature and Pressure Relief Valve will need to be

installed on top. See location of T&P relief valve in Fig. 7.

Vertical installation

If you wish to install the unit vertically, with the piping connections on top:

▶ Install supplied brass plug into tap on side of water heater. ▶ The supplied Temperature and Pressure Relief Valve will need to be

installed on top. See location of T&P relief valve in Fig. 5 and 6.

Caution

CAUTION:

To reduce the risk of excessive pressures and temperatures in this water heater:

▶ Install the supplied temperature and pressure

protective equipment required by local codes but not less than a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials, as meeting the requirements for Relief Valves and Automatic Gas Shut-off Devices for Hot Water Supply Systems, ANSIZ21.22.

6 720 801 072 (2013/05)Tronic 3000T

8 | Use

2 3 4 5

6720801072-14.1V

3.4 Electrical connections

The ES8 model must be hard wired. As per the National Electric Code the ES8 needs to be wired with 12 GA. wire to a 20 amp branch circuit.

▶ Unscrew the junction box cover and remove it. ▶ Insert 12 AWG through conduit into junction box and secure with

conduit strain relief (not supplied). ▶ Connect the wires and screw on the cover of the junction box. ▶ Make appropriate wiring connections to the water heater per the

National Electric Code.

The unit must be grounded with supplied grounding cable inside junction box. ▶ Secure junction box cover once wiring connections have been made.

When the ES8 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].

Fig. 8

[1] Cable housing (internal to the unit) [2] Wiring [3] Protection ring for wiring. [4] Additional grounding cable AWG16 (minimum length 152mm) [5] Junction box left cover [6] Nº3 self tapping screw for junction box covers fixing (with lock

washer or serrated head) [7] Junction box right cover [8] Nº1 self tapping screw for grounding (with lock washer or

serrated head) [9] Nº4 screws for junction box fixing [10] Junction box [11] Housing for junction box (in the plastic front cover)

4Use

4.1 Starting and testing

CAUTION:

▶ DO NOT supply power to water heater until filled with

water.

Turning heater on

For models which are not fitted with a switch: ▶ Supply power to the water heater by plugging in the power cord

(models ES2.5, ES4) or turning on the circuit breaker (model ES8). If the light does not come on, turn the control knob in a clockwise direction. The light will come on until water temperature has reached the thermostat temperature setting. The light will come back on any time the water temperature inside the tank drops below the thermostat setting.

4.2 Temperature setting

The temperature of the hot water is adjusted by rotating the knob M (Fig. 9) located on the front cover. Temperature range is 65 - 145 °F.

▶ Turn the knob clockwise to increase temperature. ▶ Turn the knob counter-clockwise to decrease temperature.

To fill the heater: ▶ Open supply valve for water heater to fill with water. ▶ Open hot water tap(s) supplied by the water heater to purge air out

of the system. Once air is purged, close hot water tap.

▶ Visually check for any leaks.

Tronic 3000T6 720 801 072 (2013/05)

Fig. 9

MAX

MIN

OFF

IDEAL

V W

6720801072-08.1V

6720801072-09.1V

5 Maintenance

CAUTION:

Do not attempt to repair this water heater yourself. Call a service person for assistance. Always turn off the power supply to the heater prior to servicing or draining the heater.

Periodic maintenance

For most of these operations, the water will have to be drained from the heater. For all of these operations the cord should be disconnected (ES2.5 and ES4 only) and the front cover removed.

Maintenance | 9

appear smooth. If the rod surface appears pitted, bumpy, rusty, or if the rod is missing completely, then it must be replaced.

To access the anode rod: ▶ Remove the heating element (see Section 5.4 Removing the heating

element).

Original anode rod sizes

• ES2.5, ES4: length 6½ ”, diameter 5/8”

• ES8:length 8¼ ”, diameter 5/8” Certain installations may require more frequent replacement of the

anode rod:

• recirculation applications;

• poor water quality;

• galvanic/electrolytic corrosion

• high flow applications In the event of poor water quality, Bosch recommends consulting a local

water treatment professional for water treatment options. Always ensure the water heater is grounded. Models ES2.5 and ES4 must be connected only to a properly grounded outlet. Damage resulting from

poor water quality or failure to replace the anode rod is not covered under the manufacturer’s warranty. For additional questions, please

call Bosch Technical Service.

5.4 Removing the heating element

▶ Turn off power supply and drain the heater (see previous section). ▶ Remove the front cover plate, disconnect terminals X, Y and T (Fig.

10). ▶ Unscrew the 4 heating element retaining nuts F (Fig. 10). ▶ Remove thermostat temperature sensor from well [B] located on th e

element assembly (Fig. 10).

▶ Remove the element G (Fig. 11).

5.1 Removing the cover

▶ Pry off the round cover plate (Fig. 9, [V]) from its right hand edge

(Fig. 9, [W]) with a small flat-head screwdriver. ▶ Remove the Phillips screw revealed beneath the round cover plate. ▶ The cover (Fig. 9, [C]) can now be removed by pulling out its left-

hand edge. When reassembling, work in the opposite way being

careful to insert the tongue of the cover into the slot.

5.2 Draining the heater

If the heater has been installed with flexible hoses: ▶ Shut off the power supply. ▶ Turn the heater upside down over a sink to drain the water out of it.

-or-

it can also be emptied by: ▶ Siphon through the inlet side hose. ▶ Keep a hot water faucet open while siphoning.

-or-

If the heater has been installed with rigid piping: ▶ Siphon the water out through any (lower) service valve on the (inlet

side). ▶ Keep a hot water faucet open while siphoning the water out.

5.3 Inspecting the anode rod

The purpose of the anode rod (Fig. 12, [N]) is to protect the tank against corrosion. It is critical that the anode rod be inspected once a year to determine whether it requires replacement. To access the anode rod, the heating element must be removed (see Section 5.4 Removing the heating element). Upon inspection, the anode rod surface should

Fig. 10

6 720 801 072 (2013/05)Tronic 3000T

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