Bosch Compress 3000 AW Operating Instructions Manual

Air-Water Split Heat Pump

6 720 814 470-00.2I

VOGEL&NOOT

CLIMATE CONTROL SYSTEMS

Compress 3000 AW

230V 1N~ / 400V 3N~

Operating instructions

6 720 818 009(2015/07)

2 | Table of Contents

VOGEL&NOOT

CLIMATE CONTROL SYSTEMS

Table of Contents

1 Key to symbols and safety instructions . . . . . . . . . . . . . . . . . . . 2

1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . 3

2 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1 Control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.2 Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 Overview of system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.1 Description of the functions . . . . . . . . . . . . . . . . . . . . . . . 4

4 Overview of the most frequently used functions . . . . . . . . . . . 6

4.1 Changing the room temperature . . . . . . . . . . . . . . . . . . . 7

4.2 DHW settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.3 Setting the operating mode . . . . . . . . . . . . . . . . . . . . . . . 8

4.4 Selecting a heating circuit for the standard display . . . . 8

4.5 Favourite functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.1 Remove dirt and leaves . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.2 Protective covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.3 Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.4 Snow and ice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.5 Moisture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.6 Leakage tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.7 Checking the safety valves . . . . . . . . . . . . . . . . . . . . . . . . 9

5.8 Particle filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.9 Pressure switch and overheating protection . . . . . . . . 10

1 Key to symbols and safety instructions

1.1 Key to symbols

Warnings

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.

The following keywords are defined and can be used in this document:

• NOTICE indicates a situation that could result in damage to property
or equipment.

• CAUTION indicates a situation that could result in minor to medium
injury.

• WARNING indicates a situation that could result in severe injury or
death.

• DANGER indicates a situation that will result in severe injury or
death.

Important information

This symbol indicates important information where
there is no risk to people or property.

Additional symbols

Symbol Explanation

▶ Step in an action sequence
 Cross-reference to another part of the document

• List entry
– List entry (second level)

Table 1

6 Internet connection via integrated IP module . . . . . . . . . . . 12

7 Environment / disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Technical terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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CLIMATE CONTROL SYSTEMS

1.2 General safety instructions

These operating instructions are intended for the user of the heating
system.

▶ Read any operating instructions (heat pump, heating controls, etc.)

carefully before operation and keep them.

▶ Observe the safety instructions and warnings.

Intended use

This heat pump must only be used as a heat appliance in a sealed hot
water heating system for domestic purposes.

Any other use is considered inappropriate. Any damage that results from
such use is excluded from liability.

Safety of electrical appliances for domestic use and similar
purposes

The following requirements apply in accordance with EN 60335-1 in
order to prevent hazards from occurring when using electrical
appliances:

“This appliance can be used by children of 8 years and older, as well as
by people with reduced physical, sensory or mental capabilities or
lacking in experience and knowledge, if they are supervised and have
been given instruction in the safe use of the appliance and understand
the resulting dangers. Children must not play with the appliance.
Cleaning and user maintenance must not be performed by children
without supervision.”

“If the power cable is damaged, it must be replaced by the manufacturer,
its customer service department or a similarly qualified person, so that
risks are avoided.”

Inspection and maintenance

If there is a lack of cleaning, inspection or maintenance, or if these are
carried out incorrectly, this may result in material damage and/or
personal injury, including possible loss of life.

▶ Have work carried out only by an approved contractor.
▶ Have any defects rectified immediately.
▶ Have the heating system inspected once a year by an approved

contractor, and have any required maintenance or cleaning work

carried out.
▶ Have the heat source cleaned at least every two years.
▶ We recommend that you enter into a contract covering an annual

inspection and needs-based maintenance with an approved

contractor.

Modifications and repairs

Unprofessional modifications to the heat pump or other parts of the
heating system can result in injury and/or damage to property or
equipment.

▶ Have any work carried out only by an authorised contractor.
▶ Do not remove the casing of the heat pump.
▶ Do not modify the heat pump or other parts of the heating system in

any way.

2General

Compress 3000 heat pumps belong to a series of heating systems that
recover energy from the outdoor air for heating and DHW heating.

By reversing this process and removing heat from the heating water and
releasing it to the outdoor air, the heat pump can also be used for cooling
if necessary. To do this however, the heating system must be configured
for cooling mode.

In order to obtain a complete heating system, the heat pump which is set
up outdoors must be connected to an indoor unit in the building and in
some cases also to an existing external heat source, a boiler for example.
The indoor unit with integrated electric booster heater or external heat
source serve as auxiliary heating when the heat energy demand is
particularly high, e.g. if the outside temperature is too low for the heat
pump to operate effectively.

The heating system is controlled by a user interface which is located in
the indoor unit. The user interface controls the system using a range of
different settings for the heating, cooling, DHW and other operations.
The monitoring function switches the heat pump off in the event that
faults occur for example, as this prevents the main components being
damaged.

2.1 Control unit

The user interface in the indoor unit controls the heat production based
on the outdoor sensor values, possibly in combination with the room
controller (accessory). The temperature in the building is adapted
automatically, based on the outside temperature.

The user specifies the temperature of the heating system by setting the
required room temperature at the user interface or room controller.

Various accessories (e.g. swimming pool, solar and room controller) can
be connected to the indoor unit. Additional functions and setting options
therefore become available and can also be controlled via the user
interface. For more information on accessories, refer to the relevant
instructions.

2.2 Use

Following the installation and commissioning of the heat pump and
indoor unit, specific tasks must be performed at regular intervals. These
include checking whether alarms have been triggered and simple
maintenance tasks. These actions can normally be performed by the
user unassisted. However, if problems persist it may be necessary to
contact the system installer.

Room air

The air in the installation room must be free of combustible or chemically
aggressive substances.

▶ Do not use or store combustible or explosive materials (paper,

propellants, thinners, paints, etc.) within the vicinity of the

appliance.
▶ Do not use or store corrosive substances (solvents, adhesives,

chlorinated cleaning agents, etc.) within the vicinity of the appliance.

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4 | Overview of system

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3 Overview of system

The heating system consists of two parts: the heat pump outdoors and
the indoor unit with or without integrated electric booster heater in the
building (AWES/AWMS/AWMSS).

An external heat source can also be connected, in which case an existing
electric, gas-fired or oil-fired boiler (AWBS) can be used as the auxiliary
heater.

The heating systems are normally designed with one of these
alternatives in mind. However, as the system is highly flexible, countless
other configurations are possible.

3.1 Description of the functions

In a house with water based heating a difference is made between
heating water and domestic hot water (DHW). The heating water is for
radiators and floor coils and hot water is for showers and taps.

If the system contains a DHW cylinder, the user interface ensures that
DHW heating has priority over heating mode.

The heat pump switches off at an outside temperature of
approx. – 20 °C. The indoor unit or an external heat
source then take over the heating and DHW heating.

3.1.1 Heat pump (outdoor unit)

The heat pump has the task of recovering energy from the outdoor air
and transferring it to the indoor unit.

The heat pump is equipped with an inverter control, i.e. it varies the
speed of the compressor automatically so that precisely the required
amount of energy is supplied in each instance. The speed of the fan can
also be controlled and it regulates its speed according to the
requirements. This keeps the energy consumption as low as possible.

defrosting

Ice can form on the evaporator at low outside temperatures. If the layer
of ice becomes so thick that it impedes the flow of air through the
evaporator, an automatic de-icing process is initiated. As soon as all the
ice has melted, the heat pump reverts to normal mode.

At outside temperatures greater than +5 °C, defrosting takes place when
heating mode is active with an increased output rate of air via the fan. At
low outside temperatures, defrosting is achieved by reversing the flow

direction of the refrigerant in a circuit via a 4-way valve; this type of
defrosting is referred to as 'reverse circulation'.

Working principle

The principle of operation in heating mode is as follows:

• The fan draws air through the evaporator.

• The energy in the air causes the refrigerant to boil. The gas which
forms is routed to the compressor.

• The pressure of the refrigerant in the compressor increases and its
temperature rises. The heated gas is routed under pressure to the
condenser.

• In the condenser, the water in the heat transfer medium circuit
absorbs the energy in the gas. The gas cools down and reverts to
liquid.

• The pressure in the refrigerant falls as it is controlled via expansion
valves and it is then routed back to the evaporator. It changes back to
gas when it enters the evaporator.

• The hot water arriving in the indoor unit from the heat transfer
medium circuit is then routed to the building heating and DHW
heating.

3.1.2 Indoor unit

The purpose of the indoor unit is to distribute the heat from the heat
pump to the heating system and DHW cylinder. The speed of the pump
in the indoor unit is controlled so that it automatically reduces when
demand is low. The energy consumption falls as a result.

If the heat energy demand is higher at low outside temperatures, an
auxiliary heater may be required. Auxiliary heaters can be integrated or
external and are switched in or disconnected via the user interface in the
indoor unit. If the heat pump is in operation, the electric booster heater
only produces enough heat to make up the shortfall between the heat
pump output and the required heat. As soon as the heat pump is once
again producing the required output on its own, the auxiliary heater is
switched off automatically.

Internal unit AWMS/AWMSS

If the external heat pump is combined with the AWM indoor unit,
together they constitute a complete heating and DHW system as the
indoor unit contains a DHW cylinder. The changeover between heating
and DHW is effected by an internal 3-way valve. The integrated electric
booster heater in the indoor unit is started if required.

Fig. 1 Heat pump for outdoor unit, indoor unit AWMS/AWMSS with integrated DHW cylinder and electric booster heater

Compress 3000 AW6 720 818 009 (2015/07)

Overview of system | 5

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CLIMATE CONTROL SYSTEMS

Indoor unit AWES

If the outdoor unit is combined with the indoor unit AWE and DHW is also
to be produced via the heat pump, an external DHW cylinder must be

connected. The changeover between heating and DHW is then effected
by an external 3-way valve. The integrated electric booster heater in the
indoor unit is started if required.

Fig. 2 Heat pump for outdoor unit, indoor unit AWE with electric booster heater and external DHW cylinder

AWBS

If the outdoor unit is combined with the indoor unit AWB and DHW is also
to be produced via the heat pump, an external DHW cylinder must be

by an external 3-way valve. The indoor unit is equipped with a mixe r. This
controls the heat from the external auxiliary heater which can be started
from the indoor unit if required.

connected. The changeover between heating and DHW is then effected

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Fig. 3 Heat pump for outdoor unit, indoor unit AWB without electric booster heater, external DHW cylinder and external auxiliary heater

6 720 818 009 (2015/07)Compress 3000 AW