Bosch AE125 User Manual

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Page 1

BBT

NORTH AMERICA

Bosch Group

Bosch Water Heating 340 Mad River Park Waitsfield, VT 05673

www.boschhotwater.com

Page 2

Existen restricciones en las tuberías de fontanería.

Compruebe la fontanería. Utilice sólo cinta de teflón para sellar las juntas de las tuberías. Compruebe y limpie la pantalla del filtro de aire en el calentador.

Presión de suministro de agua demasiado baja.

Compruebe que las válvulas de cierre de entrada están totalmente abiertas.

Caudal de agua demasiado bajo

Las válvulas de cierre de salida tienen un ajuste demasiado bajo.

Ajuste las válvulas de cierre de salida según se describe en la sección "Ajuste del caudal" (véase la Página 8).

La temperatura del agua fluctúa

Fluctuación en la presión del agua o en el caudal

Evite utilizar al mismo tiempo varias salidas de agua caliente, ya que esto puede ocasionar fluctuaciones en la temperatura.

Si el problema no se soluciona

La persona que instaló inicialmente la unidad es la más adecuada para proporcionar

ayuda.

También puede llamar al número de teléfono de llamada gratuita de BBT 866-330-2729. Tenga a

mano esta guía cuando llame.

PowerStar GARANTÍA LIMITADA DE 10 AÑOS

COBERTURA

APPLIED ENERGY PRODUCTS, A TRAVÉS DE SU DISTRIBUIDOR EN LOS EE.UU., BOSCH WATER HEATING (en lo sucesivo denominado BBT) garantiza este calentador de agua al propietario

original del mismo y en la ubicación de instalación original contra defectos en los materiales y en la fabricación durante el período de tiempo indicado a continuación.

PERÍODO DE GARANTÍA

1. Intercambiador de calor: si existen pérdidas o fallos en el intercambiador de calor antes de los diez (10)

años a partir de la fecha de instalación original del calentador de agua que estén ocasionados

por un defecto en el material o la fabricación, BBT proporcionará al propietario un nuevo calentador del modelo actual equiparable.

Sin embargo, si el calentador de agua se instala en otra ubicación distinta de una vivienda familiar individual, esta garantía está limitada a dos (2) años a partir de la fecha de la instalación y funcionamiento originales.

Nota: La garantía no cubre los daños ocasionados por congelación. Nota: La garantía no cubre los daños ocasionados por la formación de incrustaciones.

2. Otros componentes que no sean el intercambiador de calor: si otro componente (que no sea el intercambiador de calor) presenta defectos en el material o la fabricación antes de un (1) año a partir de la fecha de instalación original del calentador de agua, BBT proporcionará al propietario nuevos componentes.

Important Safety Instructions

When using this electrical equipment, basic safety precautions should always be followed, including the following:

1. READ AND FOLLOW ALL INSTRUCTIONS.

2. This appliance must be grounded.

3. Disconnect this product from the electrical supply before cleaning, servicing or removing the cover.

4. To reduce the risk of injury, close supervision is necessary when the product is used near children or elderly persons.

5. Warning: Do not install the heater in a location where it may be subject to freezing.

6. Warning: Do not install a check valve or any other type of back flow preventer within ten feet of the cold water inlet.

7. The electrical installation must conform to current National Electrical Codes.

8. Warning: 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.

9. The PowerStar is designed to heat potable cold water for domestic purposes. The maximum inlet water temperature it can handle is 86 degrees F. Contact Bosch Water Heating before specifying or installing the appliance in any other application.

10. Additional Canadian safety instructions:

a) 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 6).

b) 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.

c) This product shall be protected by a Class A ground fault circuit interrupter.

Contents

Using the PowerStar 3 Installing the PowerStar 3 Spare Parts 7 Starting up the PowerStar 7 How the PowerStar works 8

Specifications 9 If you have a problem 10 Warranty 11

SAVE THESE INSTRUCTIONS

Keep this guide in a safe place once your unit has been installed.

You may need to refer to it for general instructions or future maintenance.

Page 3

Using the PowerStar

WARNING

Do not use the unit if you think it may be frozen, as this could result in serious damage to the unit. Wait until you are sure that it has completely thawed out before you switch it on.

•

Check that the power is switched on at the circuit breaker panel.

•

Turn on the hot water faucet FULLY. The hot water temperature can be changed by adjusting the temperature dial on the bottom surface of the unit. (The dial adjusts the temperature typically between 95°F and 131°F. The factory sets the temperature dial at the lowest position.)

•

There are internal safety thermal cut-outs which will operate if the unit overheats. If a thermal cutout trips, then it must be reset by a qualified electrician.

• If the unit has been used recently, run the water through for a few seconds to let the temperature settle down. You may initially get a short burst of very hot water from the unit.

•

If a second outlet connected to the unit is also turned on, the hot water will be shared between the two.

Installing the PowerStar

WARNING IMPORTANT

Do not install the unit in a room where there Read entire instructions. is a chance of freezing.

Check the pressure of the main water supply. To operate correctly, the unit needs the following running pressures : Minimum: 15 psi (1 Bar) Maximum: 150 psi (10 Bar)

Securing the unit to the wall

Diagram 1 A E115 Unit AE125 Unit

Page 4

• La temperatura del agua de salida también puede variar si se sobrepasa el caudal máximo (consulte el Gráfico 1) o si cambia el voltaje de entrada.

• Cada módulo calefactor está protegido por un disyuntor térmico electromecánico. Si la temperatura de uno de los módulos calefactores sube demasiado, el disyuntor se disparará y cortará el suministro eléctrico en dicho módulo calefactor. Si se dispara el disyuntor, debe ser reajustado por un técnico de mantenimiento cualificado. Este disyuntor sólo se disparará en circunstancias excepcionales.

• La unidad AE115 se suministra con dos voltajes independientes, y la unidad AE125 se suministra con tres voltajes independientes. La unidad puede seguir funcionando si se desconecta o si falla uno de estos voltajes, pero el control de temperatura será deficiente (En Canadá, la unidad sólo dispone de un suministro de voltaje).

• Según el territorio del país, la temperatura del suministro de agua puede variar entre algo más de 4ºC en invierno y 21ºC en verano, con un promedio de 12,7ºC.

Diagrama 4: Diagrama de conexiones internas para una unidad monofásica AE125. (La unidad AE115 tiene dos módulos calefactores dos suministros). (En Canadá, durante la instalación se coloca un bloque de terminales auxiliar).

CUTOUT

L2A

L2C

L2B

L1A

L1B

L1C

Wiring Diagram for AE125, 3 x 240V supply. PowerStar heater.

Thermistor

CUTOUT CUTOUT

Electronic PCB

Temperature

adjustment

potentiometer

MODULE A

Flow

transducer

Brass inlet manifold and Triac heat sink

For clarity

The positions of

terminals shown

here do not

correspond to

their positions on

the installer

terminal blocks

MODULE B

MODULE C

Especificaciones

Unidad AE115

Unidad AE125

Suministro de voltaje

2 x 240V CA (Canadá 240V CA)

3 x 240V CA (Canadá 240V CA) Amperaje

2 x 40 A (Canadá 80 A)

3 x 40 A (Canadá 120 A) Potencia máxima

17,25 kW

26,85kW Intervalo de control de temperatura

35°C a 55°C

Intervalo de presión

15 psi hasta 150 psi

15 psi hasta 150 psi Caudal mínimo

2,26 litros/min

3,02 litros/min Caudal máximo

Véase el Gráfico 1, Página 8

Véase el Gráfico 1, Página 8 Dimensiones (sin acoplamientos de agua)

39,3 cm alto x 38,7 cm ancho x 11,4 cm profundo

39,3 cm alto x 38,7 cm ancho x 11,4 cm profundo Peso (sin agua)

9 kg

10 kg

WARNING

The unit must only be installed in the orientation shown in Diagram 1, i.e., mounted in a vertical position with the water fittings located at the bottom of the unit.

Under no circumstances should the unit be

mounted differently.

•

If being used in a public place, position the unit out of easy reach to discourage vandalism.

•

Mount the unit onto a flat section of wall, well away from any potential splash es of water or spray.

• Position the unit upright with all plumbing and electrical connections at the bottom of the unit.

Mounting on the wall

• Undo the retaining screws on the front cover and take the cover off the unit. Hold the back plate in position against the wall and mark the four mounting holes.

•

Drill the holes and secure the unit using the four wood screws supplied or an appropriate alternative method.

Plumbing the unit

WARNING

Do not install a non-return check valve within 10 feet of the inlet. Do not apply heat or solder to connections or pipes if they are already directly connected to the unit.

Fitting the pipes

• The unit should be connected directly to the main cold water supply and not to pre-heated water. (The inlet water temperature must not be greater than 86°F.) The unit should be installed with shutoff valves on both the inlet and outlet connections.

• It is recommended that you use ¾ inch or ½ inch copper or high-pressure flex connections.

•

Use Teflon tape for sealing pipe threads. Do NOT use pipe dope.

•

Remember to keep the hot water pipe runs as short as possible.

• After the unit has been plumbed, and before you wire it, flush it with water to remove any debris or loose particles. Failure to do so may make the unit inoperable.

Connecting the unit to the pipes

• The inlet and outlet connections are clearly marked on the unit. They each have a ¾ inch NPT connector.

• Install a ball valve in the cold water line. This valve 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.

DISCLAIMER

As a condition of installing this product in the Commonwealth of Massachusetts a pressure relief valve shall be installed on the cold water side, by a licensed plumber MGL 142 Secti on 19 Approval number: P1-09-25

Wiring to the unit in the United States of America

WARNING

The unit must be installed by a qualified electrician, in accordance with the current version of the National Electrical Code. The unit must be grounded.

Page 5

IMPORTANT

When the PowerStar 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.)

The AE115 requires two independent 240V AC circuits protected by two separate and independent double pole breakers (as shown) rated at 40 A each.

OFFOFF

OFF

ON ON ON ON

The AE125 requires three independent 240V AC circuits protected by three separate and independent double pole breakers (as shown) rated at 40 A each.

OFFOFF OFF OFF

OFF

ON ON ON ON ON ON

• The minimum recommended wire size is 8 AWG. (The terminal block will accept cables up to 6 AWG size.)

• The cable entry is via the 1 ¼ inch cable entry hole on the bottom right hand edge of the backplate.

• Strip back the insulation on the power wires about ½ inch. Connect the live wires to the terminals

marked “L1” and “L2.” There are two pairs of live wires in the AE115 and three pairs of live wires in the AE125.

• Any insulation on the ground wire should be stripped back about ¾ inch. The ground lead must be connected to the pillar terminal marked “GR”. (See Diagrams 2 and 3 below).

• Make sure the terminal block screws are tightened securely. Loose c onnections can cause wires to heat up.

•

Make sure that the ground wire is wrapped around its terminal stud and into the saddle washer. The nut should be tightened securely.

• Attach the front cover and tighten the retaining screws.

Page 6

• Pele el aislamiento del cable de toma de tierra, aproximadamente 1,9 cm. El hilo de toma de tierra

debe conectarse al terminal de poste con la marca "GR".

• Asegúrese de que los tornillos de los bloques de terminales están firmemente apretados. Las

conexiones sueltas pueden provocar el calentamiento de los cables.

• Asegúrese de que el cable de toma de tierra está enrollado en el vástago del terminal y en la

arandela de asiento. La tuerca debe apretarse firmemente.

• Coloque la cubierta delantera y apriete los tornillos de fijación.

Piezas de recambio

Nº de pieza

Descripción

(Consulte el Diagrama 1,

Página 3)

93 793770

Bloque terminales 4 salidas (AE115)

93 793771

Bloque terminales 6 salidas (AE125)

93 793772

Tapa frontal (blanca)

93 793773

Disyuntor térmico

93 793774

Transductor de flujo

93 793775

Caja de PCI (tapa)

93 793776

Caja de PCI (base)

93 793777

PCI de control (AE115)

93 793778

PCI de control (AE125)

93 793779

Pomo de ajuste

93 793784

Filtro de entrada _”

Para obtener información

adicionales, consulte con su

distribuidor local.

SI TIENE ALGUNA PREGUNTA

SOBRE MANTENIMIENTO O

INSTALACIÓN, LLAME AL

TELÉFONO

866-330-2729

Fax: 802-496-6924

www.boschhotwater.com

Empezar a utilizar el PowerStar

Comprobación de pérdidas

• Deje circular el agua por la unidad durante unos segundos. Compruebe que no haya pérdidas en las juntas de las tuberías.

Ajuste del disco de temperatura

• El ajuste de la temperatura se realiza con el disco situado en el borde inferior de la unidad. El ajuste está entre 35ºC y 55ºC aproximadamente. Si se gira el disco en el sentido de las agujas del reloj se aumenta el ajuste de temperatura según lo indica la marca en la unidad.

Ajuste del caudal

• Abra completamente las válvulas de cierre de entrada y salida en el calentador, y luego:

• Abra completamente la llave de agua caliente (ej.: bañera) más próxima a la conexión de salida.

• Ajuste la válvula de cierre de salida hasta que el caudal de agua de la llave de agua caliente

coincida con el valor indicado en el Gráfico 1 en la Página 8.

Wiring to the unit in Canada

WARNING

The unit must be installed by a qualified electrician, in accordance with the current version of the Canadian Electrical Code. The unit must be grounded.

IMPORTANT

•

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. This is available as a kit from BBT, Part Number "AE Canada Kit". (Contact 866-330-2729).

Fitting the auxiliary terminal block (see diagram below ).

AE115 AE125

•

Connect the red wires from the left hand terminal of the new block to the L1 terminals in the unit. (There are two red wires required in the AE115 and three in the AE125).

• Connect the blue wires from the right hand terminal of the new block to the L2 terminals in the unit. (There are two blue wires required in the AE115 and three in the AE125).

• Push and click the auxiliary terminal block onto the louvered rail in the backplate.

Connecting the supply cable

• The AE115 requires an 80A 240V AC single phase supply protected by an 80A double pole circuit breaker.

• The AE125 requires a 120A 240V AC single phase supply protected by a 120A double pole circuit breaker.

•

The power cable size and the installation must be in accordance with the Canadian Electrical Code, C22.1-02.

• The incoming hole diameter on auxiliary terminal block can accept up to 1/0 AWG size cables.

•

The cable entry is via the 1 ¼ inch cable entry hole on the bottom right hand edge of the backplate.

• Strip back the insulation on the power wires about ½ inch. Connect the ungrounded conductors to the terminals “L1” and “L2” on the auxiliary terminal block.

Page 7

• Any insulation on the ground wire should be stripped back about ¾ inch. The ground lead must be connected to the pillar terminal marked “GR.”

•

Make sure the terminal block screws are tightened securely. Loose connections can cause wires to heat up.

• Make sure that the ground wire is wrapped around its terminal stud and into the saddle washer. The nut should be tightened securely.

• Attach the front cover and tighten the retaining screws.

Spare Parts

Part Number

Description

(Refer to Diagram 1, Page 3)

93 793770 4 way term. block (for AE115) 93 793771 6 way term. block (for AE 125) 93 793772 Front cover (white) 93 793773 Thermal cut-out 93 793774 Flow transducer 93 793775 PCB enclosure (lid) 93 793776 PCB enclosure (base) 93 793777 Control PCB (for AE115) 93 793778 Control PCB (for AE125) 93 793779 Adjustment knob 93 793784 ¾” Inlet filter

For further information ask your

local dealer .

FOR SERVICE AND INSTALLATION

QUESTIONS CALL TOLL FREE:

866-330-2729 (Toll Free)

Fax: 802-496-6924

www.boschhotwater.com

Starting up the PowerStar

Checking for leaks

•

Let the water run through the unit for a few seconds. Check that no pipe joints leak.

Adjusting the temperature dial

• The temperature adjustment is made using the dial on the bottom edge of the unit. The adjustment is between approximately 95°F and 135°F. Turning the dial clockwise increases the temperature setting as indicated by the marking on the unit.

Adjusting the flow

• Open fully both inlet and outlet shut-off valves at the heater, then :

•

Turn on fully the highest flowing hot water faucet (e.g., bathtub) closest to the outlet connection.

• Adjust the outlet shut-off valve until the water flow rate from the hot faucet corresponds to the value given in Graph 1 on Page 8.

BBT

NORTH AMERICA

Bosch Group

Page 8

IMPORTANTE

Cuando el PowerStar se instale fuera de la vista de interruptores eléctricos, se debe suministrar un bloqueo de interruptor u otra forma de desconexión para todos los conductores sin toma de tierra, a la vista del equipo. (Ref NEC 422.31.)

El AE115 requiere dos circuitos independientes de CA de 240V protegidos por dos conmutadores bipolares separados e independientes (según se muestra) con un régimen de 40 A cada uno.

OFFOFF OFF OFF

ON ON ON ON

El AE125 requiere tres circuitos de CA de 240V protegidos por tres conmutadores bipolares separados e independientes con un régimen de 40 A cada uno.

OFFOFF OFF OFF OFF OFF

ON ON ON ON ON ON

• El tamaño mínimo de cable es de 8 AWG. (El bloque de terminales acepta cables de hasta 6 AWG).

• La entrada del cable se realiza a través del orificio de entrada de 1 _" situado en el borde inferior

derecho de la placa posterior.

• Pele el aislamiento de los cables de alimentación, aproximadamente 1,2 cm. Conecte los cables con corriente a los terminales con la marca “L1” y “L2”. Existen dos pares de cables con corriente en el AE115 y tres pares de cables con corriente en el AE125.

• Pele el aislamiento del cable de toma de tierra, aproximadamente 1,9 cm. El hilo de toma de tierra debe conectarse al terminal de poste con la marca "GR" (consulte los Diagramas 2 y 3).

• Asegúrese de que los tornillos de los bloques de terminales están firmemente apretados. Las conexiones sueltas pueden provocar el calentamiento de los cables.

• Asegúrese de que el cable de toma de tierra está enrollado en el vástago del terminal y en la arandela de asiento. La tuerca debe apretarse firmemente.

• Coloque la cubierta delantera y apriete los tornillos de fijación.

Graph 1

Outlet Temperature vs Maximum Flow Rate S etting

(based on incoming water temperature of 55°F)

AE1 25 H eate r

AE1 15 H eate r

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

5.00

95 100 105 110 115 120 125 130 135

Outlet Temperature (°F)

Max Flow Rate (US gal / min)

For example:

•

For the AE115 unit, using a ball valve, ensure the flow rate does not exceed 2.3 US gallons / minute.

• For the AE125 unit, using a ball valve, ensure the flow rate does not exceed 3.5 US gallons / minute.

Note: These figures are based on an inlet water temperature of 55°F and a supply voltage of 240 volts. If the inlet water temperature is lower than 55°F, or if the supply voltage is less than 240 volts, then the outlet temperature will be lower than what is shown in Graph 1. If a higher outlet water temperature is desired, then reduce the flow rate and/or supply the unit with 240 volts.

IMPORTANT

Before leaving the site, the installer should demonstrate the unit to the user and give them this guide.

How the PowerStar works

• The PowerStar heats water instantaneously as it flows through the heater modules.

• The electronic control monitors the flow rate and the incoming water temperature and then switches

on the required number of heater modules to reach the temperature set by the adjustment dial.

• As the flow rate or the incoming water temperature changes, the electronics adjust the number of heater modules 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 modules are switched on and off.

Page 9

• The outlet water temperature can also vary if the maximum flow rate is exceeded (see Graph 1) or if the supply voltage changes.

• Each heater module is protected by an electro-mechanical thermal cut-out. If the temperature of any of the heater modules gets too high, then the cut-out will trip and cut the power to that heater module. If the cut-out operates, it must be reset by a qualified service person. This cut -out will only trip in exceptional circumstances.

• The AE115 unit is supplied from two independent voltage supplies and the AE125 unit from three independent voltage supplies. The unit may continue to work if one of these supplies is switched off or fails, but the temperature control will be poor. (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.

Diagram 4: Internal wiring schematic for single phase AE125 unit. (AE115 has two heater modules and

two supplies). (In Canada an auxiliary terminal block is fitted during installation).

CUT OUT

L2A

L2C

L2B

L1A

L1B

L1C

Wi ring Dia gra m for AE12 5, 3 x 240 V su pply. Pow erSta r he ater.

Thermistor

CUT OUT CUTO UT

Ele ctroni c PCB

Temp eratu re

adju stmen t

pot entio meter

MODULE A

Flo w

tran sduce r

Bra ss inl et man ifold and T riac h eat si nk

For clarit y

The positi ons o f

term inals show n

here do n ot

corr espon d to

their posi tions on

the instal ler

term inal b locks

MODULE B

MODULE C

Specifications

AE115 Unit AE125 Unit

Voltage supply 2 x 240V AC (Canada 240VAC) 3 x 240V AC (Canada 240VAC) Amperage 2 x 40 A (Canada 80 A) 3 x 40 A (Canada 120 A) Maximum output 17.25 kW 26.85kW Temperature control range 95°F to 131°F 95°F to 131°F Pressure range 15 psi to 150 psi 15 psi to 150 psi Minimum flow rate 0.6 US gal / min 0.8 US gal / min Maximum flow rate See Graph 1, Page 8 See Graph 1, Page 8 Dimensions (excl. water couplers) 15½” H x 15

/4” W x 4½” D 15½” H x 151/4” W x 4½” D

Weight (without water) 20 lbs 22 lbs

Page 10

Uso del PowerStar

ADVERTENCIA

No utilice esta unidad si cree que se puede congelar, ya que se podría dañar gravemente la unidad. Espere hasta que esté seguro de que se haya descongelado completamente.

• Compruebe que está conectado el suministro eléctrico en el panel de interruptores.

• Abra COMPLETAMENTE la llave de agua caliente. La temperatura del agua caliente se puede

cambiar ajustando el disco de temperatura situado en la cara inferior de la unidad (El disco ajusta normalmente la temperatura entre 35ºC y 55ºC. El disco de temperatura viene ajustado de fábrica en la posición más baja).

• Existen disyuntores internos de seguridad que funcionarán si se produce un sobrecalentamiento en la unidad. Si se dispara un disyuntor térmico, se debe reajustar por un electricista cualificado.

• Si se ha utilizado recientemente la unidad, deje circular el agua unos segundos para estabilizar la temperatura. Es posible que se produzca una descarga corta de agua muy caliente de la unidad.

• Si también se abre una segunda salida conectada a la unidad, el agua caliente será compartida entre las dos salidas.

Instalación del PowerStar

ADVERTENCIA IMPORTANTE

No instale la unidad en una habitación donde Lea las instrucciones completas. se pueda congelar.

Compruebe la presión del suministro de agua principal. Para que el funcionamiento sea correcto, la unidad requiere las presiones de funcionamiento siguientes: Presión mínima: 15 psi (1 Bar) Presión máxima: 150 psi (10 Bar)

Instalación de la unidad en la pared

Diagrama 1 Unidad AE115 Unidad AE125

Note: The unit will work at lower supply voltages but the fo llowing changes will apply:

Maximum output 15kW at 220V

13kW at 208V

22.5kW at 220V 20kW at 208V

Temperature control range 87°F to 116°F at 220V

82°F to 108°F at 208V

87°F to 116°F at 220V

82°F to 108°F at 208V Maximum flow rate (refer to Graph 1, Page 8)

84% of maximum at 220V 75% of maximum at 208V

84% of maximum at 220V

75% of maximum at 208V

WARNING

Always switch off the electricity supply to the unit before you remove the cover.

If you have a problem...

Service should only be performed by qualified personnel

Symptom Cause

What to do

Electricity not on or one of the supplies has failed.

Check electricity supply.

The water supply is connected to the outlet of the unit.

Reconnect the water supply to the inlet of the unit (marked blue).

One or more of the heater module cut-outs has tripped.

Turn off the power, open the unit and reset by pushing the button(s) on the top of the heater module(s). Establish and fix the cause of the overheating.

Plumbing crossover.

Test by turning cold water supply off to heater, then open hot water faucet(s). No pressurized water flow should be evident. If it is evident, then that plumbing crossover needs to be corrected for the heater to operate.

Cold w ater only – neon light off.

The flow transducer is not working.

Turn off the power, open the unit and observe if the flow transducer “spins” when the water is turned on. If not, contact BBT toll free at 866-330-2729.

Water flow is too high.

Adjust the water flow (see Graph 1

on Page 8). One of the power supplies is not on.

Check the supply voltages to the

heater and rectify if necessary.

The power supply voltage has dropped.

This is likely an issue with the power

supply. Compensate for this by

increasing the temperature setting

(turn dial clockwise). Temperature dial is turned too low.

Turn the temperature control dial

clockwise.

Water too cold – neon light on

The inlet water temperature has dropped.

Turn temperature knob up or reduce

the flow rate according to Graph 1

on Page 8.

Page 11

There are restrictions in the plumbing.

Check the plumbing. Use only Teflon tape for sealing pipe joints. Inspect and clean inlet filter screen at heater.

Water supply pressure too low.

Check that all inlet shut-off valves are fully open.

Water flow too low

Outlet shut-off valves are set too low.

Adjust outlet shut-off valves as described in the section “Adjusting the Flow” (see Page 7).

Water temperature fluctuates

Fluctuating water pressure or changing flow rate.

Avoid several hot water outlets being used at the same time as this causes the temperature to fluctuate.

If the problem persists

The person who initially installed the unit is the best one to contact for help.

You can also call BBT toll free at 866-330-2729. Please have this guide with you when you call.

PowerStar LIMITED 10 YEAR WARRANTY

COVERAGE

APPLIED ENERGY PRODUCTS THROUGH ITS U.S. DISTRIBUTOR BOSCH WATER HEATING (herein after BBT) guarantees this water heater to the original owner of the water heater at the original installation location against defects in material and workmanship for the periods specified below.

WARRANTY PERIOD

1. The Heat Exchanger – If the original heat exchanger leaks or fails within ten (10) years from the date of original installation of the water heater because of a defect in material or workmanship, BBT will furnish to such an owner a replacement heater of the then-prevailing comparable model.

However, if the water heater is installed in other than a single family dwelling this heat exchanger warranty is limited to two (2) years from the date of original installation and operation.

Note : Damage caused by exposure to freezing conditions is not covered by the warranty. Note : Damage caused by scale formation is not covered by the warranty.

2. Any Component Part Other Than the Heat Exchanger – If any other component part (other than the heat exchanger) proves to be defective in material or workmanship within one (1) year from the date of original installation of the water heater, BBT will furnish the owner with a replacement of the defective part(s).

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PowerStar LIMITED 10 YEAR WARRANTY

(Continued from Page 11)

3. Verification of Date of Original Installation – When owner cannot verify or document the original date of installation, the warranty period begins on the date of manufacture marked on the tag affixed to the water heater.

EXCLUSIONS

1. THIS LIMITED WARRANTY SHALL BE THE EXCLUSIVE WARRANTY MADE BY THE MANUFACTURER AND IS MADE IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED (WHETHER WRITTEN OR ORAL), INCLUDING, BUT NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

2. Manufacturer shall not be liable for incidental, consequential, special or contingent damages or expenses arising, directly or indirectly, from any defect in the water heater or the use of the water heater.

3. Manufacturer shall not be liable for any water damage arising, directly or indirectly, from any defect in the water heater component part(s) or from its use.

4. Manufacturer shall not be liable under this warranty if: a) The water heater or any of its component parts has been subject to misuse, alteration, neglect

or accident, or;

b) The water heater has not been installed in accordance with the applicable local plumbing

and/or building code(s) and/or regulation(s), or;

c) The water heater has not been installed in accordance with the printed manufacturer’s

instructions, or;

d) The water heater is not continuously supplied with potable water.

5. The owner and not the manufacturer or his representative shall be liable for and shall pay for all field damages for labor or other expenses incurred in the removal and/or repair of the product or any expense incurred by the owner in order to repair the product.

SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APP LY TO YOU. THIS W ARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO H AVE OTHERS.

IMPORTANT: OWNER SHALL KEEP THIS CERTIFICATE

NOTE:

A 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.

The person who initially installed the unit is the best one to contact for help.

You can also call BBT toll free at 866-330-2729. Please have this guide with you when you call.

12.14.05

Manual de instrucciones

BBT

NORTH AMERICA

Bosch Group

Bosch Water Heating 340 Mad River Park Waitsfield, VT 05673 TOLL FREE: 866-330-2729 Fax: 802-496-6924

www.boschhotwater.com