Bosch Tronic 3000T ES2.5 Technical Document

6 720 892 061 2019/02 CA
Tronic 3000T
ES 2.5/4/8 CA...
[2] Installation Manual and Operating Instructions
[18] Manuel d'installation et notice d'utilisation

Table of contents
Tronic 3000T – 6 720 892 061 2019/02
2
Table of contents 1 Explanation of symbols and safety
information
1.1 Key to symbols
Warnings
Inwarnings,signalwordsatthebeginningofawarningareused
to indicate the type and seriousness of the ensuing risk if
measures for minimising danger are not taken.
The following signal words are defined and can be used in this
document:
DANGER:
DANGERindicates a hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING:
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION:
CAUTIONindicatesahazardoussituationwhich,ifnotavoided,
could result in minor or moderate injury.
NOTICE:
NOTICE is used to address practices not related to personal
injury.
Important information
Theinfosymbol indicates important informationwhere there is
no risk to people or property.
Additional symbols
Table 1
1.2 Safety information
1 Explanation of symbols and safety information . . . . . 2
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Information about the product . . . . . . . . . . . . . . . . . . . 5
2.1 Models overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Mounting the heater. . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Pipe connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Closed system thermal expansion . . . . . . . . . . . . . 9
3.4 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . 9
4 Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1 Starting and testing . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2 Temperature setting. . . . . . . . . . . . . . . . . . . . . . . . 10
5 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1 Removing the cover . . . . . . . . . . . . . . . . . . . . . . . . 10
5.2 Draining the heater . . . . . . . . . . . . . . . . . . . . . . . . 10
5.3 Inspecting the anode rod. . . . . . . . . . . . . . . . . . . . 10
5.4 Removing the heating element . . . . . . . . . . . . . . . 11
5.5 Descaling the heating element . . . . . . . . . . . . . . . 11
6 Replacement of parts . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.1 Changing the anode rod. . . . . . . . . . . . . . . . . . . . . 12
6.2 Changing the heating element. . . . . . . . . . . . . . . . 12
6.3 Changing the thermostat. . . . . . . . . . . . . . . . . . . . 12
7 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.1 Resetting High Limit Switch. . . . . . . . . . . . . . . . . . 14
8 Bosch interior component diagram. . . . . . . . . . . . . . . 15
9 Bosch Tronic 3000T LIMITED WARRANTY. . . . . . . . . 16 Symbol Meaning
▶ a step in an action sequence
a reference to a related part in the document
• a list entry
– a list entry (second level)

Explanation of symbols and safety information
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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
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
availableadjacenttothewaterheater,
contact a qualified electrician to have
oneproperlyinstalledneartheheater.
The model ES8 must be hard-wired.
See installation instructions.
▶ As with any appliance, close
supervision is necessary when used
by children.
▶ Donotoperatethiswaterheaterif itis
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
causedamage totheareainwhichit 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/orinstaller.ReferenceUPC2006
(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,andthemanualshouldbe
left with the owner and placed in a
location close to the installation.

Explanation of symbols and safety information
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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 60 °C (140 °F).
DANGER:
▶ Hydrogen gas can be produced in a
hot water system served by this
heater that has not been used for a
longperiodoftime(generally2 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
causedamage totheareainwhichit 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/orinstaller.ReferenceUPC2006
(Uniform Plumbing Code) Section
508.1, or IPC 2006 (International
Plumbing Code) Section 504.7.
CAUTION:
▶ Prior to connecting the power supply,
ensuretank is full of waterandsystem
is purged of air.
NOTICE:
▶ Tank failure due to neglecting to
maintain the anode rod is not covered
under warranty (see Section 5
Maintenance).

Information about the product
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Tronic 3000T – 6 720 892 061 2019/02
2 Information about the product
2.1 Models overview
Models ES2.5 and ES4
Fig. 1
[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. 2
[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
Models ES8 (Vertical installation)
Fig. 3
[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
[7] Hot water outlet ½ NPT male
[8] Hot water outlet ½ NPT male

Information about the product
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2.2 Dimensions
Models ES2.5 and ES4 (Vertical installation only)
Fig. 4
Models ES8 (Horizontal installation only)
Fig. 5
10 ¾”
6¼”
3½”
13 ½”
9”
3½”
2½”
2 ½”
3¾”
13 ¾”
½ NPT male
13 ¾”
5”
38
1”
6720801072-04.1V
ES2.5 ES4

Information about the product
7
Tronic 3000T – 6 720 892 061 2019/02
Models ES8 (Vertical installation only)
Fig. 6
2.3 Technical data
Table 2
Technical data Units ES 2.5 ES 4 ES 8
Capacity gallons 2.7 4.0 7.0 (Hor.) / 5.1 (Vert.)
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

Installation instructions
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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).
▶ Ensurea isolation valveis installedon thecold watersupply
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.
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. 6.
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. 4 and Fig. 5.
Caution
CAUTION:
To reducetheriskofexcessive 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.
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.
▶ Installthevalvein the opening providedand markedforthis
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).

Installation instructions
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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
water pressure 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.
3.4 Electrical connections
TheES8model 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. 7
[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] Nº3self tappingscrewforjunctionboxcoversfixing(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)
1
2 3 4 5
6
7
8
9
10
11
6720801072-14.1V

Use
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4 Use
4.1 Starting and testing
CAUTION:
DO NOT supply power to water heater until filled with water.
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 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.
Fig. 8
5 Maintenance
CAUTION:
Do not attempt to repair this water heater yourself. Call a
service person forassistance. Always turn off the powersupply
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.
5.1 Removing the cover
▶ Pry off the round cover plate [V] from its right hand edge
[W] with a small flat-head screwdriver.
▶ Remove the Phillips screw revealed beneath the round
cover plate.
▶ The cover [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).
▶ Keepa hot waterfaucet open whilesiphoningthewaterout.
5.3 Inspecting the anode rod
The purpose of the anode rod (Fig. 11,[N]) is to protectthe
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