Bosch Compress 3000 AWES 2-6 User manual

6720892204 (2020/06)
Installation manual
Indoor unit for air to water heat pump
Compress 3000 AWES
AWES 2-6 | 8-15

Table of contents
Compress 3000 AWES – 6720892204 (2020/06)
2
Table of contents
1 Explanation of symbols and safety instructions . . . . . . . . . . . 3
1.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 3
2 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1 Supplied parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2 Information on the indoor unit. . . . . . . . . . . . . . . . . . . . . 5
3.3 Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . 5
3.4 Type plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.5 Product overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.6 Product dimensions and minimum clearances. . . . . . . . 6
3.7 Pipe dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Preparing for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Assembly of the indoor unit. . . . . . . . . . . . . . . . . . . . . . . 6
4.2 Checks prior to installation . . . . . . . . . . . . . . . . . . . . . . . 6
4.3 Functional principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.4 Intended use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.5 Minimum volume and execution of the heating
system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.6 Preparatory pipework connections. . . . . . . . . . . . . . . . . 7
4.7 Setting up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1 Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2 Transport and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.3 Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.4 Connect the indoor unit. . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.5 Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.6 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.6.1 Connectingthe indoorunitwithintegratedelectric
booster heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.6.2 Filling the outdoor unit, indoor unit and heating
system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.6.3 Heating pump (PC0) . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.6.4 Heating circuit pump (PC1). . . . . . . . . . . . . . . . . . . . . . 11
5.7 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.7.1 EMS BUS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.7.2 CAN-BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.7.3 Handling printed circuit boards. . . . . . . . . . . . . . . . . . . 13
5.7.4 Fitting temperature sensors . . . . . . . . . . . . . . . . . . . . . 13
5.7.5 Flow temperature sensor T0 . . . . . . . . . . . . . . . . . . . . . 13
5.7.6 Outdoor temperature sensor T1 . . . . . . . . . . . . . . . . . . 13
5.7.7 External connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.7.8 Connections of SEC 20 installer module of indoor
unit with electric heater. . . . . . . . . . . . . . . . . . . . . . . . . 15
5.7.9 Connection alternative for EMS bus . . . . . . . . . . . . . . . 16
6 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1 Venting the indoor unit. . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.2 Adjusting the operating pressure of the heating
system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.3 Pressure switch and overheating protection . . . . . . . . 18
6.4 Function test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.4.1 Operating temperatures . . . . . . . . . . . . . . . . . . . . . . . . 18
7 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.1 Particle filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8 Installation of accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.1 Temperature controller (accessory, see separate
instructions). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.2 External inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.3 Installation of the domestic hot water cylinder . . . . . . 20
8.4 DHW cylinder temperature sensorTW1 . . . . . . . . . . . . 20
8.5 Diverter valve VW1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.6 Several heating circuits (with heating circuit
module) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.7 DHW circulation pump PW2 (accessory). . . . . . . . . . . 21
8.8 Installation with cooling. . . . . . . . . . . . . . . . . . . . . . . . . 21
8.9 Installing the condensation point sensors
(accessory for cooling mode) . . . . . . . . . . . . . . . . . . . . 21
8.10 Installation with swimming pool . . . . . . . . . . . . . . . . . . 21
8.11 Cooling only with fan convectors . . . . . . . . . . . . . . . . . 22
8.12 IP module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9 Operation without the outdoor unit (individual
operation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
10 Environmental protection and disposal . . . . . . . . . . . . . . . . . 23
11 Technical information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
11.1 Specifications – Indoor unit with electric booster
heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
11.2 System solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
11.2.1 Explanations of the system solutions . . . . . . . . . . . . . . 24
11.2.2 Bypass of the heating system . . . . . . . . . . . . . . . . . . . . 24
11.2.3 System solution with heat pump and indoor unit
with integrated immersion heater. . . . . . . . . . . . . . . . . 25
11.2.4 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . 26
11.3 Wiring diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
11.3.1 Overview of electrical connections. . . . . . . . . . . . . . . . 27
11.3.2 CAN & EMS BUS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
11.3.3 230 V/400 V terminal connections . . . . . . . . . . . . . . . 29
11.3.4 400 V~ 3N indoor unit with 230 V~ 1N outdoor
unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
11.3.5 400 V~ 3N indoor unit with 400 V~ 3N outdoor
unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.3.6 EVU/SG wiring diagram for the indoor unit with an
integrated electric booster heater . . . . . . . . . . . . . . . . 32
11.3.7 Photovoltaic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11.4 Kabelplan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11.5 Measurements from temperature sensors . . . . . . . . . . 32
12 System Commissioning Report . . . . . . . . . . . . . . . . . . . . . . . . 34

Explanation of symbols and safety instructions
3
Compress 3000 AWES – 6720892204 (2020/06)
1 Explanation of symbols and safety instructions
1.1 Explanation of symbols
Warnings
In warnings, signal words at the beginning of a warning are used to
indicate the type and seriousness of the ensuing risk if measures for
minimizing danger are not taken.
The following signal words are defined and can be used in this document:
DANGER:
DANGER indicates that severe or life-threatening personal injury will
occur.
WARNING:
WARNING indicates that severe to life-threatening personal injury may
occur.
CAUTION:
CAUTION indicates that minor to medium personal injury may occur.
NOTICE:
NOTICE indicates that material damage may occur.
Important information
The info symbol indicates important informationwhere there is no risk to
people or property.
Additional symbols
Table 1
1.2 General safety instructions
HNotices for the target group
These installation instructions are intended for gas,
plumbing, heating and electrical contractors. All
instructions must be observed. Failure to comply with
instructions may result in material damage and
personal injury, including danger to life.
▶ Read the installation, service and commissioning
instructions (heat source, heating controller,
pumps, etc.) before installation.
▶ Observe the safety instructions and warnings.
▶ Follow national and regional regulations, technical
regulations and guidelines.
▶ Record all work carried out.
HIntended use
This product is intended for use in sealed heating
systems in residential buildings.
Any other use is considered unsuitable. Liability will
not be assumed for any resulting damage.
HInstallation, commissioning and service
The product may only be installed, brought into
operation and maintained by trained personnel.
▶ Use only original spare parts.
HElectrical work
Electrical work must only be carried out by electrical
installation contractors.
Before starting electrical work:
▶ Isolate all poles of the mains voltage and secure
against reconnection.
▶ Make sure the mains voltage is disconnected.
▶ Observe the wiring diagrams of other system
components as well.
HHandover to the user
When handing over, instruct the user how to operate
the heating system and inform the user about its
operating conditions.
▶ Explainhowtooperatetheheatingsystemanddraw
the user's attention to any safety relevant action.
▶ In particular, point out the following:
– Alterations and repairs must only be carried out
by an approved contractor.
– Safe and environmentally compatible operation
requires inspection at least once a year and
responsive cleaning and maintenance.
▶ Point out the possible consequences (personal
injury, including danger to life or material damage)
of non-existent or improper inspection, cleaning
and maintenance.
▶ Leave the installation instructions and the
operating instructions with the user for
safekeeping.
2Regulations
This is an original manual. This manual may not be translated without the
approval of the manufacturer.
Follow the directives and regulations given below:
• Local provisions and regulations of the electricity supplier and
corresponding special rules
• National building regulations
•F-Gas regulation
•EN 50160 (voltage properties in power grids for public distribution)
•EN 12828 (heating systems in buildings - Design and installation of
water-based heating systems)
•EN 1717 (Protection of potable water against pollution in potable
water installations)
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)

Product description
Compress 3000 AWES – 6720892204 (2020/06)
4
2.1 Water quality
Water quality in the heating system
Heat pumps work at lower temperatures than other heating systems,
which is why thermal deaerating is less effective and the remaining
oxygen content is always higher than with electric, oil and gas heaters.
This means that the heating system will be more sensitive to rust with
aggressive water.
If heating systems have to be regularly refilled or if hot water samples
from these systems are cloudy, corresponding measures such as
retrofitting magnetic filters and air vents are needed beforeinstalling the
heat pump.
A heat exchanger may be required to protect the heat pump if the
specified limits cannot be reached.
Only use additives to increase the pH value and keep the water
clean.
Table 2 Water quality in the heating system
3 Product description
3.1 Supplied parts
Fig. 1 Supplied parts
[1] Indoor unit
[2] Documentation
[3] Drill template
[4] Cable feeds
[5] Particle filter with strainer
[6] Jumpers for 1-phase installation
[7] Mounting rail
[8] Flow temperature sensor
[9] Packaging includes terminals for the installation module
[10] DHW temperature sensor
[11] Bag with screws
[12] Outdoor sensor
Water quality Limit values for the heating system
Hardness <3 °dH
Oxygen content <1 mg/l
Carbon dioxide, CO2<1 mg/l
Chloride ions, Cl-<250 mg/l
Sulphate, SO4<100 mg/l
Conductivity <350 μS/cm
pH 7.5 – 9

Product description
5
Compress 3000 AWES – 6720892204 (2020/06)
3.2 Information on the indoor unit
The AWES indoor units are intended for installation inside the building
and connection to the outdoor unit.
Possible combinations:
Table 3 Selection table for wall mounted heat pump indoor units AWES
AWES is equipped with an integrated electric booster heater.
3.3 Declaration of Conformity
The design and operation of this product comply with
European Directives and the supplementary national
requirements. Conformityhas beendemonstrated bythe CE
marking.
You can ask for a copy of the Declaration of Conformity for this product.
Please refer to the contact address on the back cover of these
instructions.
3.4 Type plate
The data plate of the indoor unit is on the control device behind the
cover. It contains information on the part number and serial number and
also the date of manufacture of the device.
3.5 Product overview
Fig. 2 Components and pipework connections of the indoor unit with
electric booster heater
[1] Installer module
[2] Resetting the overheating protection
[3] Circulation pump
[4] Electrical heater
[5] Automatic air vent valve (VL1)
[6] Cable feed for sensor, CAN-BUS and EMS BUS
[7] Heat transfer medium out to ODU outdoor unit 3/8" (Liquid)
[8] Heat transfer medium in from ODU outdoor unit 5/8" (Gas)
[9] Flow to heating system
[10] Pressure gauge
[11] Drain of the pressure relief valve
[12] Return from the heating system
[13] Cable feed for power supply
AWES Outdoor unit (ODU)
2-6 4
2-6 6
8-15 8
8-15 11s/t
8-15 13s/t
8-15 15 s/t
9
10
11
12 13

Preparing for installation
Compress 3000 AWES – 6720892204 (2020/06)
6
3.6 Product dimensions and minimum clearances
Mount the indoor unit high enough so that the control unit is easy to use.
In addition, take into account pipes and connections under the indoor
unit.
Fig. 3 Minimum distance (mm)
Fig. 4 Dimensions and connections
3.7 Pipe dimensions
Table 4 Pipe dimensions
4Preparingforinstallation
The particle filter is installed horizontally in the heating system return
upstream of the inlet of the indoor unit. Note the direction of flow of the
filter.
The drain pipe of the pressure relief valve in the indoor unit must be
installed so that it is protected against frost, and the drain pipe must be
routed to the drain.
▶ Run the connector pipes for the heating system and cold/domestic
hot water in the building up to the installation location of the indoor
unit.
4.1 Assembly of the indoor unit
• Mount the indoor unit on a suitable wall within the house. The length
of piping between the outdoor unit and indoor unit must be as short
as possible. Use insulated pipes.
• Water discharged from the pressure relief valve should be routed
away from the indoor unit to visibly terminate in a frost-free outlet.
• The installation location for the indoor unit must have a drain.
4.2 Checks prior to installation
• Check that all pipe connections are intact and have not come loose
during transportation.
• Beforecommissioningtheindoor unit,checktheheating systemand,
if installed, fill and vent the DHW cylinder.
• All pipework should be as short as possible.
• The low voltage cables must be routed with a minimum clearance of
100 mm from live 230 V/400 V cables.
800
50 50
550
Pipe dimensions (mm) AWES
Heating system flow 1" male thread
CH return 1" female thread
Refrigerant pipe to/from
outdoor unit
5/8" and 3/8"
Drain/discharge ø 32

Installation
7
Compress 3000 AWES – 6720892204 (2020/06)
4.3 Functional principle
Thefunctionisbased on the demand-actuatedcontrolofthecompressor
output by switching in the integrated auxiliary heater via the indoor unit.
The control unit controls the outdoor unit depending on the set heating
curve.
If the outdoor unit is unable to satisfy the house's heat energy demand,
the indoor unit automatically starts the auxiliary heater which produces
the desired temperature in the house together with the outdoor unit.
The DHW heating is controlled via the TW1 sensor in the DHW cylinder.
During the heat-up phase of the DHW cylinder, the heating mode of the
heatingsystemis temporarilyswitched off via a 3-way valve(accessory).
Once the DHW cylinder is heated up, heating mode is continued by the
outdoor unit.
Heating and DHW mode when the outdoor unit is deactivated
When the outdoor temperature is less than –20 °C (adjustable), the
outdoor unit is automatically turned off and is unable to produce any
heat. In this case, the auxiliary heater of the indoor unit adopts the
heating and DHW mode.
4.4 Intended use
The wall mounted indoor unit must only be installed in sealed heating
systems according to EN 12828.
Any other use is considered improper use. Any damage that results from
such use is excluded from liability.
4.5 Minimum volume and execution of the heating
system
Ensure the minimum flow rate according to the specifications in the
chapter 11.1.
To safeguard the heat pump function and avoid an excessive number of
start/stop cycles, incomplete defrosting and unnecessary alarms, it
must be possible to store a sufficient amount of energy in the system.
This energy is stored in the water volume of the heating system,and also
in the components of the system (radiators) and concrete floor
(underfloor heating system).
As the requirements for different heat pump installations and heating
systems vary considerably, a minimum water volume in litres is generally
not specified. Instead, the system volume is considered to be sufficient
if certain conditions are met.
Only an underfloor heating circuit without buffer cylinders, no
mixer:
For the heat pump and defrosting function to work, at least 22 m2of
heatable floor area must be available. Furthermore, a temperature
controller must be installed in the largest room (reference room). The
room temperature measured by the temperature controller is used to
calculatethe flowtemperature(principle: weather-compensated control
with room temperature hook-up). All zone valves of the reference room
must be completely open. In certain situations, the electric booster
heater can be activated to ensure complete defrosting. That depends on
the available floor space.
Only the radiator circuit without a buffer cylinder or mixer
For the heat pumps and defrosting function to work properly, there must
be at least 4 radiators with an output of at least 500 W. Make sure that
the thermostatic valves of these radiators are fully opened. If this
condition can be met within a living area, a temperature controller is
recommended for this reference room so that the measured room
temperature can be used to calculate the flow temperature. In certain
situations, the electric booster heater can be activated to ensure
complete defrosting. This depends on the available radiator surface
area.
Heating system with 1 heating circuit without mixer and 1 heating
circuit with mixer without a buffer cylinder
Forthe heat pumps and defrosting function to work properly, the heating
circuit without mixer must have at least four radiators with an output of
at least 500 W. Make sure that the thermostatic valves of these radiators
are fully opened. In certain situations, the electric booster heater can be
activated to ensure complete defrosting. This depends on the available
radiator surface area.
Special feature
If both heating circuits have different operating times, each heating
circuit must be able to ensure the operation of the heat pump
independently. Make sure that at least 4 radiator valves of the heating
circuit without mixer are completely open and that a floor surface area of
at least 22 m2is available for the (underfloor) heating circuit with mixer.
Inthis case, temperaturecontrollers are recommended for the reference
rooms of both heating circuits so that the measured room temperature
can be used to calculate the flow temperature. In certain situations, the
electric booster heater can be activated to ensure complete defrosting.
If both heating circuits have identical operating times, the heating circuit
withmixerdoes not require a minimum areabecause the 4radiatorswith
a constant flow ensure the operation of the heat pumps. A temperature
controller is recommended in the area of the open radiator valves sothat
the outdoor unit automatically adjusts the flow temperature.
Only heating circuits with mixer (also applies to heating circuits
with fan convectors)
To ensure that a sufficient amount of energy is available for defrosting, a
buffer cylinder with a minimum capacity of 50L for sizes 2-6 and 100L
for sizes 8-15 is required.
An additional heating circuit pump is a prerequisite for this.
4.6 Preparatory pipework connections
The ball valve with particle filter is installed horizontally in the return of
the heating system. Note the direction of flow of the filter.
The drain pipe of the pressure relief valve in the indoor unit must be
installedprotectedagainstfrost,andthedrainpipe must be runtovisibly
terminate in a drain.
4.7 Setting up
▶ Dispose of the packaging according to the instructions on the
packaging.
▶ Take out the enclosed accessories.
5 Installation
NOTICE:
Residue in the pipework can damage the system.
Residue and particles in the heating system impair the flow rate and lead
to faults.
▶ Before connecting the indoor unit, flush the pipe system to remove
any foreign bodies.

Installation
Compress 3000 AWES – 6720892204 (2020/06)
8
CAUTION:
Risk of injury!
During transport and installation there are a risk of crushing injury.
During maintenance internal parts of the appliance can become hot.
▶ The installer are obliged to wear gloves during transport, installation
and maintenace.
The indoor unit is part of a heating system. Faults in the indoor unit can
occur from poor water quality in the radiators or pipework of the
underfloor heating system, or when the oxygen content in the system is
persistently high.
Oxygen causes corrosion products in the form of magnetite and
sediment.
Magnetite is an abrasive material which affects pumps, valves and
components with turbulent flow characteristics, e.g. in the condenser.
If heating systems have to be regularly refilled or if hot water samples
from these systems are cloudy, corresponding measures such as
retrofitting magnetite separators and air vents are required.
▶ Ensure the insides of the pipes are clean and do not contain any
harmful contaminants such as sulphuric compounds, oxidants,
debris and dust.
– Never store refrigerant pipes outdoors.
– Only unseal the pipe ends when you are ready to connect them to
the cold side.
– Utmost care must be taken when routing refrigerant lines.
– Only shorten refrigerant lines using pipe cutters and seal the ends
afterwards to prevent the ingress of dirt and moisture.
Dust, foreign bodies and moisture inside the refrigerant lines can be
detrimental to oil quality or can result in compressor failure.
▶ After cutting, immediately reseal reusable lengths of refrigerant
lines.
NOTICE:
Danger of faults due to contaminants in pipework!
Solids, metal/plastic filings, flax and thread tape residue and similar
material can get stuck in pumps, valves and heat exchangers.
▶ Keep foreign bodies from entering the pipework.
▶ Do not leave pipe parts and connections directly on the ground.
▶ When deburring, make sure that no residue remains in the pipe.
NOTICE:
Make sure that you use the right sensor with the appropriate
characteristics when exchanging a sensor (Chapter 11.5). Using
sensors with other characteristics leads to problems since the system is
controlled with reference to the incorrect temperature. Personal injury
such as scalding as well as damage to property can occur due to an
excessively high or low temperature. Comfort can also be adversely
affected by using the incorrect sensors.
5.1 Insulation
All heat-conducting pipework must be provided with suitable thermal
insulation according to the applicable regulations.
NOTICE:
Material damage from frost!
In case of a power outage the water in the pipes may freeze.
▶ All heat-conducting pipework must be provided withsuitable thermal
insulation according to applicable regulations.
If it is envisaged that the cooling operation be carried out below the dew
point, all connections and cables must be appropriately insulated in
accordance with the valid regulations (minimum insulation thickness
13 mm).
5.2 Transport and storage
The indoor unit must always be transported and stored in an upright
position. It can be tilted provisionally if required.
Do not store or transport the indoor unit at temperatures below
– 10 °C.
5.3 Unpacking
▶ Remove the packaging according to the instructions on the
packaging.
▶ Take out enclosed accessories.
▶ Check that all package contents are present.
5.4 Connect the indoor unit
Fig. 5 Remove front cover
▶ Remove front cover (start at bottom)
▶ Remove the lock of the control device.
▶ Feed the connecting lead through the cable feeds to the control
device.
▶ Connect the cable as shown in the wiring diagram.
▶ Reinstall the control device lock and front cover of the indoor unit.

Installation
9
Compress 3000 AWES – 6720892204 (2020/06)
Fig. 6 Cable feeds (view from below)
[1] Cable feed for sensor, CAN-BUS and EMS BUS
[2] Cable feed for power input
5.5 Checklist
Each installation is different. The following checklist contains a general
description of the recommended installation steps.
The refrigerant line should be connected before the hydraulic
connections as a recommendation.
1. Install the incoming and outgoing pipes of the indoor unit.
2. Mount the leakage water hose or pipework of the indoor unit.
3. Connect the ODU outdoor unit and indoorunit (instructions for the
outdoor unit).
4. Connect the indoor unit to the heating system. (chapter 5.4).
5. Fill and vent DHW cylinder.
6. Before starting operation, fill the heating system and vent it (
Chapter 5.6.2 and 6.1).
7. Vent heating system (Chapter 5.7).
8. Install the outside temperature sensor (Chapter 5.7.6) and, if
necessary, the room temperature-dependent controller.
9. Connect the CAN-BUS pipework between the outdoor unit ODU and
indoor unit (Chapter 5.7.2).
10.Install any accessories (heating circuit module, solar module, etc.).
11.If needed, connect the EMS BUS cable to the accessory (Chapter
5.7.1).
12. Connect the heating system to the mains power supply (Chapter
6.1).
13.Bring the heating system into operation. Use the control unit to make
the necessary settings (instructions for control unit).
14.Check that all sensors display the appropriate values (Chapter 7).
15.Check and clean the particle filter (Chapter 7).
16.Check the operation of the heating system after starting up (
Chapter 6.4).

Installation
Compress 3000 AWES – 6720892204 (2020/06)
10
5.6 Connection
5.6.1 Connecting the indoor unit with integrated electric booster
heater
Install the following connections at the indoor unit:
1. Run the drain hose from [6] fig. 7 to a frost protected outlet.
2. Connect heat transfer medium pipes from the heat pump to [2] fig.
7.
3. Connect heat transfer medium pipes to the heat pump [1] fig. 7.
4. Connect the return from the heating system to [7] fig. 7.
5. Connect the flow from the heating system to [5] fig. 7.
Fig. 7 Connection of an indoor unit with an immersion heater to a heat pump and heating system
[1] Heat transfer medium out to ODU outdoor unit 3/8" (Liquid)
[2] Heat transfer medium in from ODU outdoor unit 5/8" (Gas)
[5] Flow to heating system
[6] Waste water outlet, outlet from pressure relief valve
[7] Return from heating system
[8] Water/air filter
5.6.2 Filling the outdoor unit, indoor unit and heating system
Purge the heating system first. If the DHW cylinder is connected to the
system, it must be filled with water and also purged.
Then fill the heating system.
After the system has been filled, vent it thoroughly and clean the water
filter.
▶ Fill the system according to these instructions.
▶ Start the system according to the instructions for the control unit.
▶ Vent the system according to the chapter 6.1.
▶ Clean the particle filter as described in chapter 7.1.

Installation
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Compress 3000 AWES – 6720892204 (2020/06)
Fig. 8 Indoor unit with integrated immersion heater and heating system
[Z1] Heating system (without mixing valve)
[1] Heat pump, outdoor unit
[2] Manual air vent valve
[PC0] Heating pump
[VC2] Drain valve
[VC3] Valves for the heating system
[VL1] Automatic air vent valve
[GC1] Pressure gauge
[SC1] Water/air filter
[VW1] 3-way mixing valve
[VW2] Fill valve
See fig. 8:
1. Make sure the power supply to the heat pump and indoor unit is not
connected before the system has been completely filled and vented.
2. Activate automatic venting of VL1 by unscrewing the screw a couple
of turns without removing it.
3. Connect a hose to the heating system drain valve VC2.
4. Open the valve VC3, drain valve VC2 and fill valve VW2 to fill the
heating system.
5. Open the manual air vent valve on top of the electric heater until
water discharges without air. Close the valve afterwards.
6. Continue filling until only water comes out of the outlet hose and
bubbles no longer form in the heating system. Where appropriate,
take additional measures to vent the heating system.
7. Close the drain valve VC2.
8. Keep filling until the pressure display GC1 shows 2 bar.
9. If a DHW cylinder is installed, also fill and vent this.
10.Close the fill valve VW2.
11.Remove the hose from VC2.
12.Chapter 6.1.
5.6.3 Heating pump (PC0)
The PC0 heating pump (integrated into AWES) is equipped with a PWM
control (speed-controlled). The pump settings are made at the control
unit of the indoor unit for the given heating system (instructions of the
control unit).
The pump speed is automatically adjusted for optimum operation.
5.6.4 Heating circuit pump (PC1)
Depending on the hydraulic layout and configuration of the heating
system, a pump is needed that is selected depending on the flow rate
and pressure drop requirements.
The pump PC1 must always be connected to the installation module of
the indoor unit according to the wiring diagram.
Maximum load at the relay output of the pump PC1: 2 A, cos>0.4.If
the load is higher, install an intermediate relay.
VW1

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Compress 3000 AWES – 6720892204 (2020/06)
12
5.7 Electrical connection
DANGER:
Electrical shock!
The heat pump components conduct electricity.
▶ Before working on the electrical system,disconnect the components
from the power supply.
NOTICE:
The system will be damaged if it is turned on without water.
If the system is turned on before it is filled with heating system water, the
heating system components can overheat.
▶ Fill, vent and establish the correct operating pressure in the DHW
cylinder and heating system before turning on the heating system.
The electrical connection for the indoor unit must be safely
interruptable.
▶ Install a separate safety switch that completely de-energizes the
indoor unit. When the power supply is separate, a separate safety
switch is needed for each supply line.
▶ Select the appropriate conductor cross-sections and cable types for
the respective fuse protection and routing method.
▶ Connect the heat pump according to the wiring diagram. No
additional consumers may be connected.
▶ When changing the PCB, note the colour coding.
▶ Ensure to install residual current device based on normative
requirementsin each country. Werecommendtouse residualcurrent
device type B.
5.7.1 EMS BUS
NOTICE:
Malfunction due to faults!
High-voltage lines (230/400 V) in the vicinity of communication lines
can cause the heat pump to malfunction.
▶ Route the EMS-BUS cable separately to the power cables. Maintain a
minimum distance of 100 mm. Routing alongside sensor cables is
permitted.
EMS-BUS and CAN-BUS are not compatible.
▶ Do not connect EMS-BUS units to CAN-BUS units.
The control unit is connected via the EMS BUS to the installation module
in the indoor unit.
The control unit is supplied with power via the BUS cable. The polarity of
the two EMS BUS cables is irrelevant.
The following applies for accessories that are connected to the EMS BUS
(see also the installation instructions for the respective accessories):
▶ Ifseveral BUS unitsareinstalled, theremustbea minimumspacingof
100 mm between them.
▶ If several BUS units are installed, connect them in parallel or in a star
configuration.
▶ Use cable with a minimum cross-section of 0.75 mm2.
▶ In case of external inductive interferences (e.g. from PV systems),
use screened cables. Only earth the shielding to the casing on one
side.
5.7.2 CAN-BUS
NOTICE:
Malfunction due to faults!
High-voltage lines (230/400 V) near communication lines can cause the
indoor unit to malfunction.
▶ Run the screened CAN-BUS cable separate from the power cables.
Maintain a minimum distance of 100 mm. Routing alongside sensor
cables is permitted.
CAN-BUS: do not connect 12 V direct voltage output "Out 12 V DC" on
the installation module.
NOTICE:
Mixing up the 12 V and CAN-BUS connections will result in a system
fault!
The communication circuits are not designed for a constant voltage of
12 V.
▶ Make sure that both cables are connected to the correspondingly
marked connections on the printed circuit board (CAN high / CAN
low).
The outdoor unit and indoor unit are connected via a communication
cable, the CAN-BUS.
A LIYCY cable (TP) 2 x 2 x 0.75 (or equivalent) is suitable as an
extension cable outside of the unit. Alternatively, twisted pair cables
approved for outdoor use with a minimum cross-section of 0.75 mm2
can be used. The shield should be earthed at both ends:
▶ At casing of the indoor unit
▶ To the earth terminal of the outdoor unit.
The connection between the printed circuit boards is by two wires
because the 12 V supply from the installer module must not be
connected.
The Term switch marks the start and end of the CAN-BUS connection.
Make sure that the right boards are terminated and that all other boards
within the CAN-BUS connection are not terminated.

Installation
13
Compress 3000 AWES – 6720892204 (2020/06)
Fig. 9 CAN-BUS connection
[1] indoor unit
[2] outdoor unit
5.7.3 Handling printed circuit boards
Printed circuit boards with control electronics are very sensitive to
electrostatic discharge (ESD). To prevent damage to the components,
special care is therefore required.
CAUTION:
Damage due to electrostatic charge!
▶ Wear an ESD wrist strap when handling unenclosed PCBs.
Fig. 10 Wrist strap
The damage is not normally immediately recognisable. A PCB may
function perfectly during commissioning and problems often only arise
later on. Charged objects are only a problem if they are in the vicinity of
the electronics. Observe a safety clearance of at least one metre from
foam rubber, protective film and other packaging materials, and do not
wear clothing made of synthetic fibres (e.g. fleece pullovers) and similar,
when you start work.
An earthed wrist strap offers good ESD protection when working with
electronics. This wrist strap must be worn when opening the screened
metallic bag/packaging or prior to exposing a fitted PCB. The wrist strap
must be worn until the PCB has been placed inside its screened
packaging or has been connected inside the closed control device.
Replaced PCBs that are returned must be handled in this way.
5.7.4 Fitting temperature sensors
In the default setting, the control unit automatically controls the flow
temperature based on the outdoor temperature. A room temperature-
dependent controller can be installed for greater comfort. If cooling
mode is intended, a temperature controller is absolutely essential.
5.7.5 Flow temperature sensor T0
The temperature sensor is part of the scope of delivery of the indoor unit.
▶ Install the temperature sensor 1-2 metres downstream of the 3-way
valve or on the buffer cylinder, if installed.
▶ Connect the flow temperature sensor on the installation module in
the control device of the indoor unit to terminal T0.
5.7.6 Outdoor temperature sensor T1
A screened cable must be used if the outdoor temperature sensor cable
is longer than 15 m. The screened cable must be earthed in the heat
pump. The max. length of a screened cable is 50 m.
The cable to the outdoor temperature sensor must meet the following
minimum requirements:
• Cable diameter: 0.5 mm2
• Resistance: max. 50 ohm/km
• Number of conductors: 2
▶ Mount the sensor on the coldest side of the house, normally facing
north. The sensor must be protected against direct sunlight,
ventilation air or other factors which could affect temperature
measurement. The sensor may not be installed directly under the
roof.
▶ Connect the outdoor temperature sensor T1to the terminal T1 on the
installer module.

Installation
Compress 3000 AWES – 6720892204 (2020/06)
14
Fig. 11 Outdoor temperature sensor positioning
5.7.7 External connections
NOTICE:
Material damage due to incorrect connection!
The electrical components may become damaged if connected to the
wrong voltage or current.
▶ Only make connections that are adapted for 5 V and 1 mA to the
external connections of the indoor unit.
▶ If coupling relays are required, only use relays with gold contacts.
The external inputs I1 and I4 can be used for remote control of individual
control unit functions.
Functions which areactivated via the externalinputs aredescribed in the
instructions for the control unit.
The external input is either connected to a manual switch or a control
device with a 5 V relay output.
1/2H(min 2m)
H
N
S
WE
NW NE
SW SE
6 720 809 156-23.1I

Installation
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Compress 3000 AWES – 6720892204 (2020/06)
5.7.8 Connections of SEC 20 installer module of indoor unit with electric heater
Fig. 12 SEC 20 installer module of indoor unit with electric heater
Continuous line = connection made at the factory
Dotted line = connection made during installation:
[1] CAN-BUS to outdoor unit
[2] Alarm electric heater/pressure switch (~230 V input voltage)
[3] Power supply 230 V ~1 N
[4] Code switch and LED bus communication
[T0] Flow temperature sensor
[T1] Outside temperature sensor
[TW1] DHW sensor
[TC0] Heat transfer medium in
[TC1] Heat transfer medium out
[TC3] Condenser temperature
[I1] Ex. input
[TR7] Hot gas temperature sensor
[TR3] Liquid temperature sensor
[MK2] Condensation point sensors
[Buzzer] Alarm sounder (accessory)
[PC0] Pump primary circuit PWM signal
[I4] Ex. input
[EE2] Electric heater, step 2
[EE1] Electric heater, step 1
[EE3] Electric heater, step 3
[PW2] DHW circulation pump
[E3] Heating cable (HC), accessory (~230 V output)
[PK2] Heating pump cooling buffer/fan convectors
[VW1] 3-way diverter valve for DHW (accessory)
[PC1] Heating pump (heating system)
[PC0] Heating pump (brine pump)
Max load for relay outputs PW2, PK2, VW1, PC1: 2 A, cos φ > 0.4.
Maximum load for CUHP inst.: 6.3 A
Note regardinginputI1(connection13, 14) and I4 (connection 49, 50).
Contact on the component or relay that is connected to this input must
be suitable for 5 V and 1 mA.
Note regarding [4]:
Coding switches A and P must not be adjusted! Otherwise malfunctions
and faults will occur.
Important: check the coding when a replacement part is used.
TR
TR
7
3

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Compress 3000 AWES – 6720892204 (2020/06)
16
5.7.9 Connection alternative for EMS bus
Fig. 13 Connection alternative for EMS bus
[A] Star configuration and connection inseries with external junction
box
[B] Star configuration
[C] Serial connection
[1] Installation circuit board
[2] Accessory modules (room temperature-dependent controller,
heating circuit module and solar module)
B CA
111
222
222
222
222

Commissioning
17
Compress 3000 AWES – 6720892204 (2020/06)
6 Commissioning
6.1 Venting the indoor unit
Fig. 14 Indoor unit with internal immersion heater and heating system
[Z1] Heating system (without mixing valve)
[1] Heat pump, outdoor unit
[2] Manual air vent valve
[PC0] Heating pump
[VC2] Drain valve
[VC3] Valves for the heating system
[VL1] Automatic air vent valve
[GC1] Pressure gauge
[SC1] Water/air filter
[VW1] 3-way mixing valve
[VW2] Fill valve
See fig. 14:
1. Connect the power supply to the heat pump and indoor unit.
2. Activate "Only auxiliary heater" and make sure that the heating pump
PC1 is running.
3. Remove the pulse widthmodulation plug PC0 from the heating pump
PC0 so that it can operate at maximum speed.
4. Deactivate the "Only auxiliary heater" function when no more air is
coming out of the VL1 or the manual air vent valve on top of the
electric heater. Close the manual air vent valve.
5. Connect the PC0 pulse width modulation plug to the heating pump.
6. Clean the particle filter SC1.
7. Also vent via the other air vent valves of the heating system (e.g.
radiators).
8. Check the pressure on the pressure gauge GC1 and top up with the
fill valve VW2 if needed. The pressure should be 0.3–0.7 bar above
the pressure set in the expansion vessel.
9. Check that the heat pump is running and that there are no alarms.
6.2 Adjusting the operating pressure of the heating
system
Table 5 Operating pressure
▶ Top up to 1.5–2.0 bar unless otherwise specified.
▶ If the pressure does not remain constant, check whether the heating
system has any leaks and if the capacity of the expansion vessel for
the heating system is sufficient.
VW1
Display on the pressure gauge
1 bar Minimum charge pressure. When the system is cold, the
operating pressure must be kept at roughly 0.2–0.5 bar
above the pre-charge pressure of the nitrogen cushion in
the expansion vessel. The pre-charge pressure is 0.7–
1.0 bar as a rule.
3bar Maximum charging pressure at maximum heating water
temperature: must not be exceeded (the pressure relief
valve will open).

Maintenance
Compress 3000 AWES – 6720892204 (2020/06)
18
6.3 Pressure switch and overheating protection
The pressure monitor and overheating protection are only installed in
indoor units with integrated electric booster heater.
The pressure switch and overheating protection are connected in series.
Alarms or information triggered at the control unit indicate either that
the operating pressure is too low, or that the temperature of the electric
booster heater is too high.
NOTICE:
Material damage from running dry!
When the heating pump PC0 is operated for a long time when the
operating pressure is too low, it can be damaged.
▶ Eliminate any leaks in the system that are indicated when the
pressure switch is triggered.
The triggering of the pressure switch only blocks the electric booster
heater. The heating pump PC0 and the outdoor unit can continue to run
if there is a risk of frost.
Pressure switch
The indoor unit has a pressure switch which triggers once the pressure in
the heating system falls below 0.5 bar. Once the pressure exceeds
0.5 bar, the pressure switch is automatically reset.
▶ Make sure that the expansion vessel and pressure relief valve are
configured for the indicated operating pressure, and check whether
an additional expansion vessel is necessary in the system.
▶ Check the system for leaks, and use a larger expansion vessel if
necessary.
▶ Slowly increase the pressure in the heating system by adding water
through the fill valve.
Overheating protection
The overheating protectiontriggers when the temperature of the electric
booster heater rises above 95 °C.
▶ Check the operating pressure.
▶ Check the heating and DHW settings.
▶ Reset the overheating protection. To do this, press the button on the
bottom of the terminal box. ([13], fig. 2).
6.4 Function test
▶ Start the system according to the instructions for the control unit.
▶ Vent the system according to chapter 6.1.
▶ Test the active components of the system as described in the
instructions for the control unit.
▶ Check if the start conditions have been met for the outdoor unit.
▶ Check if there is a heating or hot water demand.
-or-
▶ Draw off DHW or increase the heating curve to generate demand (if
necessary, adjust the setting for Heating mode down if the outside
temperature is high).
▶ Check if the outdoor unit starts.
▶ Make sure that there are no current alarms (see control unit
instructions).
-or-
▶ Eliminate any faults according to the control unit instructions.
▶ Check the operating temperatures in accordance with the
instructions for the control unit.
6.4.1 Operating temperatures
The operating temperature check must be performed in heating mode
(not in DHW or cooling mode).
For optimum system operation, the flow rate in the heat pump and
heating system must be monitored. This check should be performed
after 10 minutes heat pump operating time and during high compressor
heating output.
The temperature differential for the heat pump must be set for the
different heating systems.
▶ With underfloor heating system 5 K as temp.diff. Setting heating.
▶ With radiators 8 K as temp.diff. Setting heating.
These settings are optimal for the heat pump.
Check the temperature differential at high compressor heating output:
▶ Open the diagnosis menu.
▶ Select Monitored values.
▶ Select Heat pump.
▶ Select Temperatures.
▶ Readtheprimary flowtemperature(heat transfer medium off, sensor
TC3) and return temperature (heat transfer medium on, sensor TC0)
in heating mode. The flow temperature must be higher than the
return temperature.
▶ Calculate the difference TC3–TC0.
▶ Check whether the difference corresponds to the delta value set for
heating mode.
If the temperature differential is too large:
▶ Vent the heating system.
▶ Clean filters / strainers.
▶ Check pipe dimensions.
Temperature differential in the heating system
▶ Set the output at the heating pump PC1 so that the following
difference is achieved:
▶ With underfloor heating system: 5 K.
▶ With radiators 8 K.
7 Maintenance
DANGER:
Electrical shock!
▶ Before working on the electrics, the main power supply must be
switched off.
NOTICE:
Deformation due to heat!
If the temperature is too high, the insulation (EEP) in the indoor unit
deforms.
▶ When carrying out welding work in the heat pump, protect the
insulation with a heat resistant cloth or damp cloth.
▶ Only use genuine spare parts!
▶ Refer to the spare parts list when ordering spare parts.
▶ Replace removed gaskets and O-rings with new ones.
The tasks described below must be carried out during an inspection.
Display activated alarm
▶Checkthealarmlog(instructions for the control device).
Function test
▶ Carry out function check (Chap. 6.4).

Installation of accessories
19
Compress 3000 AWES – 6720892204 (2020/06)
Install power cable
▶ Check the power cable for mechanical damage. Replace damaged
cables.
7.1 Particle filter
The filter prevents particles and contamination from entering the heat
pump. Over time, the filter can become blocked and must be cleaned.
To clean the filter, the system does not need to be emptied. The filter is
integrated into the shut-off valve.
Cleaning the strainer
▶ Close the valve (1).
▶ Unscrew the cap (manually) (2).
▶ Take out the strainer and clean it by running water over it or by
pressure cleaning.
▶ Reinstall the strainer. For proper assembly, make sure that the guide
bumps fit into the recesses in the valve.
Fig. 15 Cleaning the strainer
▶ Screw the cap back on (tighten handtight).
▶ Open the valve (4).
Check the magnetite indicator
After installation and startup the magnetite indicator must be checked at
more frequent intervals. If a lot of magnetic dirt is clinging to the
magnetic bar in the particulate filter and that dirt frequently causes an
alarm related to the poor flow (e.g., low or poor flow, high flow supply or
HP alarm) a magnetite filter (see list of accessories) must be installed to
avoid regular draining of the indicator. A filter also increases the
longevity of components in the heat pump as well as the remaining parts
of the heating system.
8 Installation of accessories
8.1 Temperature controller (accessory, see separate
instructions)
Ifthetemperaturecontrollerisinstalled aftercommissioning the system,
it must be set in the commissioning menu as control unit for the
corresponding heating circuit (instructions for the control unit).
▶ Before commissioning the system, make the setting for the heating
circuit at the temperature controller, if required (instructions for
temperature controller).
▶ When commissioning the system, specify that a temperature
controller is installed as control unit for heating circuit 1 (
instructions for the control unit).
▶ Set the room temperature as specified in the instructions for the
control unit.
If a component is already connected to the EMS terminal, connect in
parallel to the same terminal according to fig. 16. If several EMS
modules are installed in the system, connect them according to fig. 13,
chapter 5.7.9.
Fig. 16 EMS connection on the installer module
8.2 External inputs
Route all low voltage cables (measuring current) separately from cables
carrying 230 V or 400 V to avoid inductive interference (minimum
separation of 100 mm).
Whenextendingtemperaturesensor cables, use the following conductor
diameters:
• Cable up to 20 m in length: 0.75 to 1.50 mm2
• Cable up to 30 m in length: 1.0 to 1.50 mm2
The relay output PK2 is active in cooling mode and can be used tocontrol
the cooling/heating mode of a fan convector or a heating pump, or to
control underfloor heating circuits in humid rooms.
1.
2.
2.
1.
12
34
6 720 805 915-01.1I
6 720 809 156-42.2I
EMS NSC/IP

Installation of accessories
Compress 3000 AWES – 6720892204 (2020/06)
20
Maximum load at relay outputs: 2 A, cosϕ > 0.4. If the load is higher, it
will be necessary to use an intermediate relay.
WARNING:
Material damage from incorrect connection!
The electrical components may become damaged if connected to the
wrong voltage or current.
▶ Only make connections that are adapted for 5 V and 1 mA to the
external connections of the indoor unit.
▶ If coupling relays are required, only use relays with gold contacts.
8.3 Installation of the domestic hot water cylinder
If the domestic hot water cylinder is installed lower than the heat pump
(e.g. in the cellar), a natural circulation can occur that leads to heat loss
in the cylinder.
▶ Install a non-return valve in the circuit to prevent natural circulation if
the installation height of the domestic hot water cylinder is below the
heat pump.
Fig. 17 Hot water cylinder
[1] Non-return component
The connection instructions are in the cylinder documentation.
When using a DHW cylinder (circuit flow cylinder) in the heating system,
an automatic air vent valve must be mounted on the cylinder. This also
applies to twin wall cylinders.
When using a circuit flow cylinder in the heating system, an automatic air
vent valve must be installed at the inlet to the cylinder with a micro-
bubble separator.
8.4 DHW cylinder temperature sensorTW1
When a DHW cylinder is connected and TW1 is connected to the system,
this is automatically actuated upon starting.
▶ Connect the hot water temperature sensor TW1 on the installation
module in the control device to terminal TW1.
8.5 Diverter valve VW1
System solutions with a domestic hot water cylinder require a diverter
valve (VW1). Connect the diverter valve VW1 on the installer module in
the indoor unit to terminal VW1 (fig. 18).
Fig. 18
Fig. 19
[A] To the domestic hot water cylinder
[B] To the heating system (or buffer cylinder)
[AB] From the indoor unit
Fig. 20 Contact closed, connection A open
During domestic hot water heating,the contact is closed and connection
A is open.
CW1
TW1
1