Bosch AD HP270-1 Bedienungsanleitung

DOMESTIC HOT WATER HEAT PUMP

This document is confidential and restricted to exclusive use by the official technical

assistance of Bosch in the countries of destination of this product.

MANUAL FOR AFTER SALES TECHNICIANS

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1. INTRODUCTION...........................................................................................3

1.1 GENERAL DESCRIPTION ............................................................................................................ 3

1.2 ADVANTAGES,ARGUMENTS AND APPLICATIONS.......................................................................... 4

1.3 PRODUCT PRESENTATION ......................................................................................................... 7

2. COMMISSIONING AND START UP..............................................................8

2.1 PACKAGE RECEPTION /IDENTIFICATION OF THE APPLIANCE........................................................ 8

2.2 PRE-COMMISSIONING CHECK LIST............................................................................................ 11

3. INSTALLATION ACCESSORIES VENTING................................................13

4. VENTILATION ACCESSORIES ..................................................................17

5. COMPONENTS CHARACTERISTICS AND REPAIRS ...............................27

5.2COMPONENTS AND CHECKS IN THE STORAGE TANK................................................................... 30

5.3 HYDRAULIC CONNECTIONS –COLD WATER INLET ...................................................................... 31

5.4 HYDRAULIC CONNECTIONS –RECIRCULATION........................................................................... 33

5.5 HYDRAULIC CONNECTIONS -OPTIONAL ACCESSORIES .............................................................. 35

5.6 HYDRAULIC CONNECTIONS –HOT WATER OUTLET ................................................................... 36

5.7 STORAGE TANK ELEMENTS .................................................................................................... 37

6. HYDRAULIC SCHEMES –HEAT PUMP INTEGRATION ...........................38

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1. Introduction

Domestic Hot Water Heat Pumps (DHW-HP), with or without air connections ducts, use the heat existing in the

surrounding air, or the waste heat from the indoor air, as an energy source for DHW preparation.

These machines are commonly known as air-source hot water heat pump and they are energy-saving and

environmentally friendly equipments. They have an efficiency which is usually 3 times higher than the traditional

gas water heaters, oil-fired and gas boilers, electric water heaters, with a plug-and-play system structure and easy

maintenance.

The heat pump has generally three operation modes:

-normal mode –only heat pump operation

-combi mode–heat pump and electric resistance operation

-electric heater mode–only electric resistance operation

The heat source can be the waste heat as referred, but also the potential energy of unheated rooms, or the air

discharged from rooms with high humidity such as bathrooms, toilets and laundry rooms.

1.1 General description

This model of domestic hot water heat pump provides hot water for residential purposes using a closed refrigerant

unit filled with a refrigerant gas (R134a). This ensures the energy production, by taking out the energy from a cold

source - air, and delivering this energy to a secondary circuit –water - where a simple circulation pump, ensures

the water flow through a heat exchanger, heating the water stored in a tank.

(a) (b)

Pict.1 Refrigeration Unit (a) and Storage Tank (b)

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1.2 Advantages, arguments and applications

- The Heat pump works, even at night, producing hot water in a continuous way to store for the time of usage;

- Easy installation, similar with current installation of indirect storage tanks;

- Heat pump can deliver more hot water amount (continuous recovery);

- Can be installed in a cellar or ground division in the house, doing dehumidification and cooling of the place;

- Works well in humid climates or in cloudy humid days due to the wide range of air temperature;

- The efficiency increases as the surrounding air temperature increases.

Best applications of a heat pump

- Replacing electric water heaters or storage tanks;

- In residences with 4 or more people, with high hot water consumption;

- In commercial applications, where heat can be extracted from a hot plant room;

- In locations with humid conditions like laundries;

- Taking air from outside, especially to walls facing equator (warm and stable outdoor temperatures due to sun

exposition).

Where do not to install a heat pump

- In applications for low hot water demand;

- In unventilated cupboards or small rooms, unless a ducted air source is available;

- In heated rooms;

- Outdoor, with extreme freezing conditions;

- In living places, where the compressor noise can disturb.

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Application 1

Surrounding indoor air (Waste Heat) is a useful and free heat to use in this kind of air source Heat Pumps.

Pict.4 –Application 1

Application 2

Dehumidified air in laundry rooms can be used to dry the ambient air and prevent moisture damage caused by

dampness.

Pict.5 –Application 2

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Application 3

Indoor air of a room is extracted out from other places, like storage rooms, wine cellars, hobby rooms, furnace and

laundry rooms over an air duct, and is then cooled and dehumidified in the hot water heat pump and blown into the

room again.

This air ducting in the heated section of the system should be insulated with water-proof insulation to prevent

condensates creation.

Pict.6 –Application 3

Application 4

A pipe duct system with integrated by-pass flap, allows variable use of the heat contained in the air, extracted from

outdoor or indoor location, for hot water preparation.

Pict.7 –Application 4

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1.3 Product presentation

Apart of the main function of the heat pump operation with the required mandatory components of a air/water heat

pump with electrical backup installed for any eventual need, some models have an integrated internal coil for

external energy source a standing or wall hung boiler or even solar energy installation.

Picture 8 shows the internal constitution and main components:

1) Fan and evaporator group

2) Compressor

3) Condenser (Plate Heat Exchanger)

4) Filter dryer and expansion valve

5) Water circulation pump

6) Storage tank

7) Electrical resistance for backup

8) Internal coil for external backup (eg. solar)

Pict.8 –Elements of the Bosch Heat Pump

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2. Commissioning and start up

2.1 Package Reception / Identification of the Appliance

The Heat Pump has following information stickers:

-Packaging label (Pict. 9, 10 or 11)

-Type Plate –appliance identification type plate label (Pict. 15)

Packaging label includes following information:

Brand

Recycling and certification stamps

Order number

Countries of destination

Product designation

Weight

Bar code

Transport and storage conditions

Production date

Pict.9 –Packaging Label Junkers

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Pict.10 –Packaging Label Buderus

Pict.11 –Packaging Label Bosch

In order to ensure the correct transport conditions from factory to the end-user installation place, it is strongly

recommended the use of special and adequate transportation devices in order to ensure the minimum tilting, even

during transport in stairs and / or other obstacles, without damaging the appliance or any particular component.

Attention! Before switching the appliance on, ensure 30minutes rest time, in the final vertical installation position.

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Pict.12 –Example of transportation device

Pict.13 –Example of use

Attention: if the appliance is tilted more than 20º when touching the floor, the bottom of the tank cover can be

damaged and the feet can be deformed.

The type plate has the main important information about the product identification, indispensable for installers and

after sales technicians.

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