Bosch TRONIC 3000 US3-2R Technical Document

6 721 803 545 (2020/02) US
Installation Manual and Operating Instructions
Electric water heaters
TRONIC 3000
Models:US3-2R, US4-2R, US7-2R & US9-2R
IMPORTANT: This booklet should be given to the customer after installation and demonstration.
For Service & Installation contact:
BOSCH Thermotechnology Corp.
65 Grove Street
Watertown, MA 02472
Phone [phone]
Fax [phone]
www.bosch-thermotechnology.us

Table of contents
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Table of contents
1 Explanation of Symbols and Important
Safety Instructions
1.1 Key to symbols
Warnings
In warnings, signal wordsat the beginning of a warning are used 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:
DANGER indicates 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,if notavoided,
could result in minor or moderate injury.
NOTICE:
NOTICE is used to address practices not related to personal
injury.
Important information
The info symbol indicates important information where there is
no risk to people or property.
Additional symbols
Table 1
1 Explanation of Symbols and Important Safety
Instructions. . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .2
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.2 IMPORTANT SAFETY INSTRUCTIONS. . . . . . . . . . . .3
1.3 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.4 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2 Regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3 Information about the product . . . . . . . . . . . . . . . . . . . .4
3.1 Package contents. . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.2 ProductDimensions andInteriorComponents. . . . .5
3.3 Technical Information . . . . . . . . . . . . .. . . . . . . . . . .7
4 Installation . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4.1 Install Location. . . . . . . . . . . . . . . . . . .. . . . . . . . . . .7
4.2 Water connections. . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.3 Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.4 Electrical connections . . . . . . . . . . . . .. . . . . . . . . . .9
4.5 Securing the unit to the wall . . . . . . . . . . . . . . . . . 10
5 Start up and operation . . . . . . . . . .. . . . . . . . . . . . . . . 11
5.1 Adjusting flow and regulating temperature . . . . . 11
5.2 Reset Thermal Cut-out. . . . . . . . . . . . . . . . . . . . . . 12
6 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1 Possible faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.2 Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Interior components and parts list . . . . . . . . . . . . . . . 15
Symbol Meaning
▶ a step in an action sequence
a reference to a related part in the document
•alistentry
–a list entry (second level)

Explanation of Symbols and Important Safety Instructions
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1.2 IMPORTANT SAFETY INSTRUCTIONS
HWhen 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.
▶ Do not install the heater in a location
where it may be subject to freezing.
▶ Do not install a check valve or any
other types of back flow preventer
within six feet of the cold water inlet.
▶ The electrical installation must
conform to current National Electrical
Codes.
▶ 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.
▶ This product shall be protected by a
Class A ground fault circuit
interrupter.
HInstallation and servicing.
▶ The installation and service of this
product must only be carried out by a
qualified person in accordance to
these instructions.
HAdditional Canadian Safety
Instructions
• A green terminal (or wire connector
marked "G", "GR", "GROUND", or
"GROUNDING")isprovidedwithinthe
control box. To reduce the risk of
shock connect a continuous copper
groundwirefromtheterminalblockto
the electric service panel in
accordance with the Canadian
Electrical Code Part 1.
HSAVE THESE INSTRUCTIONS
▶ Keep this guide in a safe place once
your Tronic 3000 unit has been
installed.
▶ You may need to refer to it for general
instructions or future maintenance.

Regulations
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1.3 Safety information
Fig. 1
The chart below shows the relationship between water
temperature and time until there is a risk of scalding. It can be
used as the basis for determining the safest water temperature
for your application.
Table 2 Approximate time-temperature relationship until
there is a risk of scalding
WARNING:
Thisproduct canexpose youto chemicalsincluding lead, which
is known to the State of California to cause cancer and birth
defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
1.4 Disclaimer
Commonwealth of Massachusetts
As a condition of installing this product in the Commonwealth
ofMassachusetts apressurereliefvalve shall beinstalled onthe
cold water side, by a licensed plumber MGL 142 Section 19.
2Regulations
Any federal, state, and local laws and regulations pertaining to
installation and use of electric water heater appliances must be
observed.
• The electrical installation must conform to current National
Electrical Codes.
• To reduce the risk of electrical shock, connect the GR
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.
• 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 circuitbreakerlockoutoradditional localmeans
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.
3 Information about the product
3.1 Package contents
• Electric water heater
• 4 No. 8 wood screws and anchors
• Documentation
Temperature Time to severe scalding1)
1) Source: Moritz, A.R. and Henriques, F.C., Jr. (1947).
Studies of thermal injury. II. The relative importance of
time and surface temperature in the causation of
cutaneous burns, Am J of Pathol, 23, 695-720.
120 °F (49 °C) longer than 5 minutes
125 °F (51 °C) 1.5 to 2 minutes
130°F(54°C) approx.30seconds
135 °F (57 °C) approx. 10 seconds
140 °F (60 °C) less than 5 seconds
145 °F (62 °C) less than 3 seconds
150 °F (65 °C) approx. 1.5 seconds
155 °F (68 °C) approx. 1 second

Information about the product
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3.2 Product Dimensions and Interior Components
Fig. 2 Product dimensions (mm)

Information about the product
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Fig. 3 Interior Components
[1] Mounting hole (backplate)
[2] Upper trim
[3] Thermal cut-out (manual re-set)
[4] Neon light
[5] Heating elements
[6] Terminal block
[7] Cable grommet
[8] Cable clamp
[9] Cable entry
[10] Serial and model sticker
[11] Cold water inlet
[12] Hot water Outlet
[13] Flow switch
2
9
11
12
1345
6
7
8
6721803545-01.1V
10
13

Installation
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3.3 Technical Information
Table 3 Technical data and temperature rise information
The temperature rises are based on the higher voltage values
(i.e. 240 and 120):lower voltages will cause a lower
temperature rise.
To operate correctly the unit needs the following running water
pressures:
Table 4 Water pressure requirements
4 Installation
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
withthemost recentedition oftheNational ElectricalCode.
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.
4.1 Install Location
NOTICE:
Appliance damage!
▶ The water heater must be mounted on a vertical wall or
surface and positioned with water and power connections
shown in Fig. 13.
Protection areas 1 and 2
▶ Do not install the heater in protection areas 1 and 2
(Fig. 4).
Model Volts Amps
1)
1) Current draw for maximum voltage
Element
Resistance
Loading (watts) Temperature Rise (deg F) at Flow rate (GPM)
For high Rated Power
Low High 0.3
GPM
0.4
GPM
0.5
GPM
0.75
GPM
1.0
GPM
1.5
GPM
2.0
GPM
2.5
GPM
US3-2R 110-120 15 1x8 1513 - 1800 41 31 24 16 12 865
US3-2R 110-120 30 2x8 3025 - 3600 82 61 49 33 24 16 12 10
US4-2R 208-240 91x25 1891 - 2250 2)
2) Value is below the activation flow.
38 31 20 15 10 8 6
US4-2R 208-240 19 2x25 3781 - 4500 2) 76 61 41 31 20 15 12
US7-2R 208-240 15 1x16 3025 - 3600 2) 2) 2) 33 24 16 12 10
US7-2R 208-240 30 2x16 6050 - 7200 2) 2) 2) 65 49 33 24 20
US9-2R 208-240 20 1x12 3576 - 4760 2) 2) 2) 43 32 22 16 13
US9-2R 208-240 40 2x12 7151 - 9521 2) 2) 2) 86 65 43 32 26
Model Running pressures
US 3 Minimum: 25 psi (1,7 bar)
US 4/7/9 Minimum: 10 psi (0,7 bar)
All models Maximum: 150 psi (10,3 bar)

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▶ Install the heater outside the protection areas and keep a
minimum distance of 24" (60cm) from the bathtub.
Fig. 4 Protection areas for bathtub or shower stall
DANGER:
Risk of electric shock!
▶ Ensure that the appliance is disconnected from power and
all circuits breakers are off before performing any work.
4.1.1 Freeze prevention
If the heater must be left in a space that is subject to freezing
temperatures, all water must be drained from the heater.
Freezing damage is not covered under the warranty.
NOTICE:
Appliance damage!
▶ Use of agents like anti-freeze are not allowed as they may
cause damage to the water heater’s internal components.
Draining the heater
Follow the procedure below to best minimize the chance of
freeze damage:
▶ Disconnect electric supply.
▶ Disconnect cold and hot water pipes from fittings on
bottom of heater. Allow water to drain out.
▶ After allowing all water to drain out, the heater should be
blown out with low pressure compressed air to remove as
much water as possible.
4.2 Water connections
▶ The unit should be connected directly to the main cold
water supply and not to pre-heated water. The unit should
be installed with service valves on both the inlet and outlet.
These valves can be used to turn off the water supply to the
unit if it needs servicing, or to reduce the water flow if it is
too high.
▶ We recommend that you use ½" copper or high pressure
flex connections rated to a minimum of 150 psi.
▶ Use Teflon tape for sealing pipe threads. Do NOT use pipe
dope.
▶ The inlet and outlet are clearly marked on the unit. They
each is a male ½" NPT fitting.
▶ If the unit is to supply a sink, we recommend that you use
aerators.
▶ If the unit is to supply more than one sink, the aerator
should be the same at each tap if they are to be used at the
same time.
▶ Before the unit is connected to the water supply flush the
pipes to remove, flush the incoming pipework with water to
remove any debris or loose particles. Failure to do so may
make the unit inoperable.
4.3 Water quality
Water quality will have an impact on appliance longevity.
If water quality exceeds one or more of the values specified on
table 5, water softening/conditioning is required.
Table 5 Maximum acceptable water quality parameters
24 in
(60 cm)
(225 )cm
6721803545-23.1V
(60 cm)
24 in
89 in
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

Installation
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4.4 Electrical connections
Table 6 Electrical requirements
Connecting the unit to power
▶ Strip back the outer insulation on the power wires about
1 3/8" (35mm) and the conductor 3/8" (9.5mm)
(Fig. 5).
Fig. 5
▶ Undotheretainingscrewson thecover(x4)and removethe
cover of the unit.
Fig. 6
▶ Remove lower trim held by a single screw (Fig. 7).
Fig. 7
▶ Break off relevant plastic piece of lower trim to allow cable
to enter the product (Fig. 8 and fig. 9). For acceptable
installation positions and cable entry points fig. 13.
Fig. 8
Fig. 9
▶ Feed the cable through the cable grommet.
Model Rated
Voltage
(V)
Rated
Current
(A)
Minimum
requiredwire
Size (AWG)
Fuse
Protection
(A)
US3-2R 120 30 10 30
US4-2R 240 20 10 30
US7-2R 240 30 10 30
US9-2R 240 40 850
x 1
6721803545-06.1V

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▶ Connect the cables to the terminal block (Fig. 10):
insulation needs to be through the end of the grommet to
provide a good seal.
Fig. 10
▶ Ensure that all the terminal block screws are tightened
securely.
▶ Set the Power Selector Screw to the desired setting. If it is
set to LO (Fig. 12), only one heating element will
operate and the output will be half power. See the Table 3
for temperature rise at various flow rates. If the element is
set on HI (Fig. 11), both heating elements will operate
and the output will be full power (default setting). When
setting the Power Selector Screw, ensure that the screw is
adjusted all the way to the end of the slot and that it is well
tightened.
Fig. 11 Full power (HI)
Fig. 12 Half power (LO)
4.5 Securing the unit to the wall
4.5.1 Deciding the position
▶ If being used in a public place, position theunit out of reach
to discourage vandalism.
▶ Mount the unit onto a flat section of wall away from any
potential splashes of water or spray.
Keep the lengths of hot water pipe to a minimum in order to
reduce thermal loss.
▶ If the unit is to supply a sink, install it either above or below
the sink.
6721803545-18.1V
6721803545-21.1V
6721803545-22.1V

Start up and operation
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Tronic 3000 – 6 721 803 545 (2020/02)
Fig. 13 Unit position
[P] Power
[C] Cold
[H] Hot
4.5.2 Mounting on the wall
▶ Hold the backplate in position against the suitable wall
while you mark the four mounting holes.
▶ Drill the holes and securethe unit to the wall using the four
no. 8 wood screws supplied.
NOTICE:
Appliance damage!
▶ Do not install a non-return check valve within 6 feet of the
inlet.
5Startupandoperation
NOTICE:
▶ Do not use the unit if you think it may be frozen, as this
couldresultin seriousdamage tothe unit.Wait until youare
sure it has completely thawed out before you switch it on.
NOTICE:
Appliance Damage!
Before turning on power:
▶ Open cold water shutoff valve to the unit and turn on all hot
water taps supplied by the unit. Flow water out the tap(s)
until all air has purged from the unit and plumbing.
▶ Turn on the power to the unit.
▶ Turn on the hot tap FULLY.
If the tap is not full on, the temperature of the water may
vary. The hot water temperature can then be set by
adjusting the flow.
If the unit has been used recently:
▶ Run the water through for a few seconds to let the
temperature settle down.
The water temperature coming out of the unit may be very
hot.
If a second tap connected to the unit is also turned on, the hot
waterwillbe sharedbetween the two, thereforethe flowand/or
the temperature of the water will decrease.
5.1 Adjusting flow and regulating temperature
▶ Ensure the service valves are open.
▶ Turn on the hot tap fully at the sink.
▶ Adjust the outlet service valve until the water comes out of
the tap at the required temperature, (increase flow for
cooler, decrease for hotter). Refer to table 3, for
expected temperature rise at given flow rates.
6721803545-13.1V

Start up and operation
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▶ Check that the unit works correctly when the sink tap is
closed and then opened again.
▶ Use the outlet service valve to regulate the flow and
temperature.
When using the hot water at a fixture, open tap fully. To regulate
hot water temperature, adjust water flow accordingly as
directed in Section 5.1.
If the unit is servicing a single lever faucet you may need to
restrict the cold water supply to the faucet to balance water
pressure and improve performance.
5.2 Reset Thermal Cut-out
The unit has a thermal cut-out (fig. 3) which is mounted on
the heat exchanger tube. The Thermal cut-out opens at 194 °F
interrupting power to the elements.
If the cut-out trips it will need to be reset manually inside the
unit.Thiscut-outwill onlyoperateinexceptionalcircumstances
(fig. 14). Call your service person or Bosch Water Heating if
this happens frequently.
Fig. 14
[A] Manual reset thermal cut out
A
PRESS TO
RESET
PRESS TO
RESET
6721803545-04.1V

Troubleshooting
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6Troubleshooting
DANGER:
Risk of electric shock!
▶ Alwaysswitchoffthe electricalsupply totheunit beforeyou
remove the cover.
6.1 Possible faults
Table 7
Symptom Cause What to do
Water too cold -
neon light on.
Water flow too high Adjust water flow (see Table 3).1)
The power selector screw
not all the way to “HI”.
Change the power select screw to “HI” (Fig. 11).1)
One element is not working. Switch off the electricity and check the resistance of the elements (
Table 3).1)
The power supply voltage
has dropped.
Check the supply voltage to the heater (Table 3).1)
Cold water only -
neon light off.
Cut-out has operated. Switch off the electricity. Identify and fix the cause of the cut-out operation and
then reset the cut-out (Fig. 14).1)
Water flow too
low, or tempera-
ture too high.
There are restrictions in the
plumbing.
Check the plumbing.1)
Check that outlet restrictors and aerators on showers and/or faucets are clear.1)
Little or no water
flows.
The water supply is turned
off. Turn on the main supply fully at the stop valve.
Cold water only -
neon light off.
The flow is not high enough
to activate. Open the inlet service valve fully.
Water too cold -
neon light on.
The water flow rate is too
high. Adjust the flow rate with hot water outlet service valve.
The inlet water temperature
has dropped. Adjust the flow rate with hot water outlet service valve.
Water flow rate
too low, or tempe-
rature too high.
The main supply of water
flow is too low. Increase the water flow.
The hot tap is not fully open. Adjust the stop/ball valve so that water is at the right temperature with the tap
fully open (see section 5.1). Always turn the hot tap full on.
Water
temperature
fluctuates.
Fluctuating water pressure
and/or flow is causing the
flow switch to cycle on and
off.
Increase the flow rate.
Be sure that the isolation valves are properly adjusted.
Be sure that the outlet restrictors and aerators on showers and/or faucets are
clear.
Be sure that there is no plumbing crossover by shutting off the inlet isolation
valve and opening all hot water outlets served by the Tronic 3000. If there is a
steady flow, then cold water is flowing into hot water service lines and back-
pressuring the Tronic 3000. This condition must be fixed or the heater will not
work properly.
1) Only to be carried out by qualified contractors.

Troubleshooting
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6.2 Electrical diagram
DANGER:
Risk of electric shock!
▶ Always switch off the electrical supply to the unit before
removing cover or performing any maintenance and
service.
Fig. 15 Internal wiring plan
[1] Flow switch
[2] Heating elements
[3] Electrical supply
[4] Neon light
[5] Manual reset Thermal cut-out
GR L1
L2
1
2
3
4
5
6721803545-03.1V

Interior components and parts list
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7 Interior components and parts list
Fig. 16
Table 8
6721803545-14.1V
1234
7
5
6
Number Code Comp. description
1 8-738-726-324 Flow Switch
28-738-700-866-0 Thermal Cut-Out Assembly (Manual Re-set)
3 8-738-726-321 Upper trim & screw
48-738-726-325 Cover Retaining Screws (x4)
5 8-738-701-695-0 Cable Clamp and Rubber Boot
68-738-726-323 Lower Trim & screw
7 8-738-726-326 Front Cover - (partially shown)

Tabla de contenidos
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Tabla de contenidos
1 Explicación de los símbolos e instruccio-
nes importantes de seguridad
1.1 Explicación de los símbolos
Advertencias
En las advertencias, las palabras de señalización indican el tipo y
la gravedad de las consecuencias que conlleva la inobservancia
de las medidas de seguridad indicadas para evitar riesgos.
Las siguientes palabras de señalización están definidas y pue-
den utilizarse en el presente documento:
PELIGRO:
PELIGRO significa que pueden haber daños personales graves.
ADVERTENCIA:
ADVERTENCIA advierte sobre la posibilidad de que se produz-
can daños personales de graves a mortales.
ATENCIÓN:
ATENCIÓN indica que pueden producirse daños personales de
leves a moderados.
AVISO:
AVISO indica que puede haber daños materiales.
Información importante
La información importante que no conlleve riesgos personales
o materiales se indicará con el símbolo que se muestra a conti-
nuación.
Otros símbolos
Tab. 1
1 Explicación de los símbolos e instrucciones
importantes de seguridad . . . . . . . . . . . . . . . . . . . . . . 16
1.1 Explicación de los símbolos . . . . . . . . . . . . . . . . . 16
1.2 INSTRUCCIONES IMPORTANTES DE
SEGURIDAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
1.3 Instrucciones de seguridad. . . . . . . . . . . . . . . . . . 18
1.4 Número de aprobación . . . . . . . . . . . . . . . . . . . . . 18
2 Reglamentos. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . 18
3 Información sobre el calentador . . . . . . . . . . . . . . . . . 18
3.1 Contenido del paquete . . . . . . . . . . . . . . . . . . . . . 18
3.2 Dimensiones del aparato y diagrama de
componentes interiores. . . . . . . . . . . . . . . . . . . . . 19
3.3 Dados técnicos. . . . . . . . . . . . . . . . . . .. . . . . . . . . 21
4 Instalación . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1 Localización de la instalación . . . . . . . . . . . . . . . . 21
4.2 Conexiones de agua. . . . . . . . . . . . . . . . . . . . . . . . 22
4.3 Calidad del agua. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.4 Conexiones eléctricas . . . . . . . . . . . . . . . . . . . . . . 23
4.5 Asegurar la unidad a la pared . . . . . . . . . . . . . . . . 24
5 Puesta en marcha y operación. . . . . . . . . . . . . . . . . . . 25
5.1 Ajuste del flujo y temperatura de regulación . . . . 25
5.2 Restablecimiento manual del corta circuito
térmico . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6 Solución de problemas . . . . . . . . . . . . . . . . . . .. . . . . . 27
6.1 Posibles fallas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.2 Diagrama eléctrico. . . . . . . . . . . . . . . . . . . . . . . . . 28
7 Componentes interiores y lista de piezas . . . . . . . . . 29
Símbolo Significado
▶Procedimiento
Referencia cruzada a otro punto del documento
• Enumeración/punto de la lista
–Enumeración/punto de la lista (2º. nivel)

Explicación de los símbolos e instrucciones importantes de seguridad
17
Tronic 3000 – 6 721 803 545 (2020/02)
1.2 INSTRUCCIONES IMPORTANTES DE SEGURI-
DAD
HAl utilizar equipos eléctricos, se
deben seguir la precauciones bási-
cas de seguridad, incluyendo las
siguientes:
▶LEA Y SIGA TODAS LAS INSTRUC-
CIONES.
▶ Este aparato debe estar conectado a
tierra.
▶ Desconecte este producto del sumi-
nistro eléctrico antes de limpiarlo,
darle servicio o quitar la cubierta.
▶ Para reducir el riesgo de lesiones, es
necesaria una estrecha supervisión
cuando el producto se utiliza cerca de
niños o personas mayores.
▶ Instalación en interiores solamente,
donde no quede expuesto a la conge-
lación.
▶ No instale una válvula de retención o
cualquier otro tipo de limitador de
caudal de retorno dentro de seis pies
de la entrada de agua fría.
▶ La instalación eléctrica debe ser con-
forme a los actuales Códigos Eléctri-
cos Nacionales.
▶ No encienda el calentador si sospe-
cha que puede estar congelado.
Espere hasta estar seguro de que se
funda completamente descongelado.
▶ Este producto debe estar protegido
por un interruptor diferencial Clase A.
HInstalación y servicio
▶ La instalación y servicio sólo debe ser
realizada por una persona calificada
de acuerdo con estas instrucciones.
HInstrucciones adicionales cana-
dienses de seguridad
• Una terminal verde (o conector con la
marca "G", "GR", "TIERRA", o "TIE-
RRA") se proporciona dentro de la
caja de control. Para reducir el riego
de descarga eléctrica, conecte la tie-
rra con un cable de cobre desde el
bloque de terminales al panel de ser-
vicio eléctrico de acuerdo con el
Código Eléctrico Canadiense, Parte I.
HGUARDE ESTAS INSTRUCCIONES
▶ Guarde esta guía en un lugar seguro
una vez que su unidad Tronic 3000
secondary ha sido instalada.
▶ Es posible que tenga que referirse a
ella para consultar las instrucciones
generales o de mantenimiento futuro.

Reglamentos
Tronic 3000 – 6 721 803 545 (2020/02)
18
1.3 Instrucciones de seguridad
Fig. 1
En el siguiente gráfico se presenta la relación entre la tempera-
tura del agua y el tiempo hasta cuando hay riesgo de formación
de quemaduras. Se puede tomar como base para determinar
las temperaturas de agua más seguras para su uso.
Table 2 Relación aproximada tiempo-temperatura hasta la
formación de quemaduras
ADVERTENCIA:
Este producto puede exponer le a químicos incluyendo plomo,
que es conocido por el Estado de California como causante de
cáncer y defectos de nacimiento u otros daños reproductivos.
Para mayor información, visite www.P65Warnings.ca.gov.
1.4 Número de aprobación
Estado de Massachusetts
Como condición para instalar este producto en el Estado de
Massachusetts se debe instalar una válvula de alivio de presión
en el lado del agua fría, por un plomero MGL 142 Sección 19.
2Reglamentos
Se debe cumplir cualquier ley y reglamentos locales relativos a
la instalación y el uso de aparatoseléctricos calentadores de
agua. Por favor, consulte las leyes que deben ser atendidas en
su país.
• La instalación eléctrica debe ajustarse a las actuales Códi-
gos Eléctricos Nacionales.
• Para reducir el riesgo de descargas eléctricas, conecte el
terminal GR o conector a la terminal de tierra de servicio
eléctrico del panel de alimentación con un cable de
cobre, de conformidad con el Código Eléctrico Cana-
diense, Parte I.
• Este producto debe estar protegido por un interruptor dife-
rencial Clase A.
• La unidad debe ser conectada por un electricista califi-
cado, de acuerdo con la versión actual del Código Eléctrico
Nacional EE.UU.) o el Código Eléctrico Canadiense
(Canadá).
• Cuando el calentador no está a la vista de los interruptores
de circuito eléctrico, un interruptor de circuitos u otra
forma de desconexión local para todos los conductores sin
puesta a tierra debe estar siempre a la vista del aparato.
(Ref. NEC 422.31.).
• El tamaño del cable de alimentación y la instalación debe
estar de acuerdo con el Código Eléctrico Canadiense,
C22.1-02.
3 Información sobre el calentador
3.1 Contenido del paquete
• Calentador de agua eléctrico
• 4 tornillos y tacos para madera Nº 8
• Documentatión
Temperatura Tiempo hasta quemaduras graves1)
1) Source: Moritz, A.R. and Henriques, F.C., Jr. (1947).
Studies of thermal injury. II. The relative importance of
time and surface temperature in the causation of
cutaneous burns, Am J of Pathol, 23, 695-720.
120 °F (49 °C) más de 5 minutos
125 °F (51 °C) de 1.5 a 2 minutos
130 °F (54 °C) aprox. 30 secundos
135 °F (57 °C) aprox. 10 secundos
140°F(60°C) menosde5secundos
145 °F (62 °C) menos de 3 secundos
150 °F (65 °C) aprox. 1.5 secundos
155 °F (68 °C) aprox. 1 secundo
PELIGROP E L I G R O
QUEMADURA
CALIENTECALIENTE
CALIENTECALIENTE
6 720 809 775-16.1TL
La temperatura del agua por encima de 125ºF
(51,6ºC) puede causar quemaduras graves al
instante o la muerte debido a las escaldaduras.
Los niños y las personas mayores o discapa-
citadas tienen un riesgo mayor de sufrir
quemaduras.
Consulte el manual de instrucciones antes de
fijar la temperatura en el calentador de agua.
Pruebe el agua antes de bañarse o ducharse.

Información sobre el calentador
19
Tronic 3000 – 6 721 803 545 (2020/02)
3.2 Dimensiones del aparato y diagrama de componentes interiores
Fig. 2 Dimensiones del aparato (mm)

Información sobre el calentador
Tronic 3000 – 6 721 803 545 (2020/02)
20
Fig. 3 Componentes
[1] Orificio de montaje
[2] Soporte (o guía) superior
[3] Corta-circuito térmico (restablecimiento manual)
[4] Luz de neón
[5] Elementos de calefacción
[6] Bloque de terminales
[7] Recubrimiento de goma
[8] Abrazadera de cable
[9] Cable de entrada
[10] Placa de características (modelo y número de serie)
[11] Entrada agua fría
[12] Salida agua caliente
[13] Interruptor de flujo
2
9
11
12
1345
6
7
8
6721803545-01.1V
10
13