Tronic 3000T ES 2.5
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
Tronic 3000T
ES 2.5/4/8...
6 720 801 072 (2013/05) US
2 | Table of contents
Tronic 3000T6 720 801 072 (2013/05)
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
Explanation of symbols and safety information | 3
6 720 801 072 (2013/05)Tronic 3000T
1 Explanation of symbols and safety
information
1.1 Key to symbols
Warnings
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
Additional symbols
1.2 Safety information
▶ 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.
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
CAUTION:
When using electrical appliances, safety precautions to
reduce the risk of fire, electric shock or injury to persons
should be followed, including:
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).
4 | Information about the product
Tronic 3000T6 720 801 072 (2013/05)
Fig. 1
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)
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
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.
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).
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Information about the product | 5
6 720 801 072 (2013/05)Tronic 3000T
Models ES8 (Vertical installation)
Fig. 4
[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
2.2 Dimensions
Models ES2.5 and ES4 (Vertical installation only)
Fig. 5
1
2
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10 ¾”
6¼”
3½”
13 ½”
9”
3½”
2½”2 ½”
3¾”
13 ¾”
½ NPT male
13 ¾”
5”
3
8
1”
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ES2.5 ES4
6 | Information about the product
Tronic 3000T6 720 801 072 (2013/05)
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
12.0 for each model
Phases
1
Temperature range °F
65 - 145
Recovery rate gallons/hour
6.8
Table 2
14 ½”
4½”
8½”
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17.6”
1”
11.4”
¾ NPT MALE
2½”
6½”
14 ½”
4½”
8½”
17.6”
17.6”
6720801072-05.1V
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3”
11.4”
¾ NPT MALE”
1”
Installation instructions | 7
6 720 801 072 (2013/05)Tronic 3000T
3 Installation instructions
3.1 Mounting the heater
3.1.1 Wall mounting
▶ Fasten the supplied mounting bracket to the wall.
▶ 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).
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
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.
The ES2.5 and ES4 water heaters are designed to be
installed under the sink.
NOTICE: Material damages!
Use screws that are suitable for the wall material and the
weight of the heater.
The model ES8 can be piped horizontally from the side or
vertically from the top.
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.
8 | Use
Tronic 3000T6 720 801 072 (2013/05)
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
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.
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.
1
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CAUTION:
▶ DO NOT supply power to water heater until filled with
water.
Maintenance | 9
6 720 801 072 (2013/05)Tronic 3000T
Fig. 9
5 Maintenance
Periodic maintenance
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
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 the
element assembly (Fig. 10).
▶ Remove the element G (Fig. 11).
Fig. 10
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.
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.
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