Bosch AW 4 OR-S User manual

6721866761 (2023/06) IE, UK
Installation Instructions
Air to water heat pump
AW 4 | 5 | 7 OR-S

Table of contents
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
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 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Standard delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Information about the heat pump . . . . . . . . . . . . . . . . . . 4
2.4 Available accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.5 Product Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.6 Regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.7 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.7.1 Heat pump dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.8 Protection zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.8.1 Protection zone, ground-placedheatpump by wall . . . . . 6
2.8.2 Protection zone, ground-placed heat pump free
standing or on a flat roof . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.8.3 Protection zone, ground-placed heat pump in a
corner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Preparing for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Transport and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Installation location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Positioning clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4 Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.4.1 Quality requirements for the heating water . . . . . . . . . . 9
3.5 Minimum volume and execution of the heating
system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1 Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2 Mounting the heat pump . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Installation on floor stand . . . . . . . . . . . . . . . . . . . . . . . 11
4.4 Installation with installation kit . . . . . . . . . . . . . . . . . . . 11
4.5 Assembly of wall mounted outdoor unit . . . . . . . . . . . . 12
4.6 Foundation plan without floor stand. . . . . . . . . . . . . . . 13
5 Hydraulic connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 Pipe connections, general . . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Drain for condensate . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3 Connect the heat pump to the indoor unit . . . . . . . . . . 16
6 Side cover and transport fitting. . . . . . . . . . . . . . . . . . . . . . . . 17
7 Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.1 CAN-BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.2 Connect the heat pump . . . . . . . . . . . . . . . . . . . . . . . . . 18
8 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.1 Cleaning of the drip tray . . . . . . . . . . . . . . . . . . . . . . . . 20
9 Environmental protection and disposal . . . . . . . . . . . . . . . . . 21
10 Technical information and reports . . . . . . . . . . . . . . . . . . . . . 21
10.1 Specifications – heat pump. . . . . . . . . . . . . . . . . . . . . . 21
10.2 Range for heat pump without booster heater. . . . . . . . 24
10.3 Refrigerant circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.4 Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.4.1 Circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.4.2 Circuit diagram XCU-SRH (XCU-HP). . . . . . . . . . . . . . . 27
10.4.3 Measurements for temperature sensor . . . . . . . . . . . . 28

Explanation of symbols and safety instructions
3
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
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 andcan 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 information where there is no risk to
people or property.
Additional symbols
Table 1
Table 2
1.2 General safety instructions
These installation instructions are intended for plumbers, heating
system installers and electricians.
▶ Read all installation instructions (heat pump, control system etc)
carefully before installation.
▶ Follow safety and warning instructions.
▶ Follow national and regional regulations, technical regulations and
guidelines.
▶ Document all work that has been performed.
HIntended operation
This heat pump is intended to be used in a closed heating system for
households. All other use is considered unsuitable. Any damage that is
caused by such usage is excluded from liability.
HInstallation, commissioning and service
The heat pump may only be installed, brought into operation and
maintained by authorised personnel.
▶ Use only original spare parts.
HSpecial qualifications for refrigerant R290
Action requiring the product to be opened must only be taken by
personnel with knowledge of the properties of and risks associated with
the refrigerant R290.
Work on the refrigerant circuit and involving equipment with flammable
refrigerants requires special training in addition to standard repair
procedures for refrigerant equipment.
▶ Follow instructions in applicable laws and regulations.
HDanger of fire or explosion of flammable gases
The product contains the flammable refrigerant R290. If a leak occurs,
the refrigerant may form a combustible gas due to mixing with air. There
is a risk of fire and explosion.
▶ When working on the opened product, use a gas detector to ensure
that there is no leakage. The detector must be calibrated for R290
and set to ≤ 25% of the lowest flashpoint.
▶ Make sure that there are no sources of ignition in the vicinity of the
product.
▶ If a R290 leakage is detected, call a R290 qualified technician.
HElectrical work
Electrical work may only be performed by authorised electrical
installers.
Before commencing work:
▶ Disconnect mains voltage on all poles and ensure it cannot
reconnect.
▶ Check to ensure that the power is disconnected.
▶ Also check the connection diagram for other parts of the system.
HConnection to supply mains
Means to safely disconnect the unit from supply mains must be
incorporated.
▶ Install a safety switch that disconnects all poles from supply mains.
The safety switch shall be an over voltage category III appliance.
HHandover to the user
Instruct the user on the usage and operating conditions for the heating
system at handover.
▶ Explain how to use the system and in particular provide information
on all safety-related instructions.
▶ Inform the user that rebuilds and repairs may only be performed by
trained installers.
▶ Inform the user that inspections and maintenance are necessary for
ensuring safe and environmentally-friendly operation.
▶ Supply the user with all the installation and maintenance
instructions.
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)
Symbol Meaning
Warning of flammable materials. This appliance uses
the flammable refrigerant R290. If the refrigerant is
leaked and exposed to an external ignition source,
there is a risk of fire.
Warning of moving parts. After front cover removal,
moving parts can be accessed. Serious injury to hands
or fingers. Keep hands away from moving parts.
Disconnect power before servicing.
Maintenance by a qualified person should be done
while following the instructions of the service manual.
For operation follow the instructions of the user
manual.

Product description
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
4
2 Product description
2.1 Standard delivery
Fig. 1 Standard delivery
[1] Heat Pump
[2] Condensate drain connector
[3] Straps for transport
[4] Ground brackets
[5] Cable ties for fastening the cables in the electric box at installation
[6] Set of documents
A drilling template is printed on the carton of the accessory box. This
template can be used to place the necessary anchor points for the heat
pump.
2.2 Declaration of Conformity
The design and operating characteristics of this product comply with the
British, European and supplementary national requirements.
TheUKCAandCE markingsdeclarethatthe product
complies with all the applicable British and
European legislation, which is stipulated by
attaching these markings.
You can request the complete text of the Declaration of Conformity from
the UK address indicated in this document.
2.3 Information about the heat pump
AW OR are heat pumps intended to be connected to the indoor units 12
M, 12 E or 12 MB.
12 M has an integrated electric booster heater, DHW cylinder and a small
buffer cylinder.
12 E has an integrated electric booster heater.
12 MB has an integrated electric booster heater and a buffer cylinder.
2.4 Available accessories
• Installation kit with insulation and pipe cover is recommended for all
installations where the pipes are routed downward.
• A short heating cable is integrated, but in case of an extended
condensate drain pipe is needed an accessory heating cable should
be installed if there is a risk of frost.
• Wall brackets are available for wall mounting of the heat pump.
• Floor stand is available for mounting on the ground, in cases where a
higher ground clearance is needed.
2.5 Product Overview
The heat pump is equipped with a transport fitting (screw). The
transport fitting prevents the heat pump from being damaged in transit.
▶ Remove the transport fitting at installation (Chapter 6).
Fig. 2 Product Overview front view
[1] Compressor
[2] Receiver
[3] Electronic expansion valve VR1
[4] 4-way valve
[5] Pressure sensor low pressure
[6] Service port low pressure
[7] Service port high pressure
[8] Transport fitting, to be removed at installation
1
0010039095-005
2
3
4
5
6
0010039862-006
3
4
1
2
5
6
7
8

Product description
5
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
Fig. 3 Product Overview back view
[1] Condenser
[2] Pressure sensor high pressure
[3] Pressure switch sensor high pressure
[4] Dry filter (mounted at service action)
[5] Manual de-airing valve
[6] Evaporator
Open the de-airing valve when filling the system and close it when no
more air is coming out.
2.6 Regulations
Follow the directives and regulations given below:
• Local provisions and regulations of the electricity supplier and
corresponding special rules
• National building regulations
•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)
•EN 378 (Refrigerating systems and heat pumps - Safety and
environmental requirements)
•EN60335-2-40 (Particular requirements for electrical heat pumps,
air-conditioners and dehumidifiers)
•PED, 2014/68/EU (Pressure equipment directive)
2.7 Dimensions
2.7.1 Heat pump dimensions
Fig. 4 Heat pump dimensions and connections, rear
[1] Type plate
The type plate contains information on the output, part number and
serial number and also the date of manufacture.
Fig. 5 Heat pump dimensions, top
Fig. 6 Distances to drain connector, bottom view
[F] front
0010039863-004
6
1
4
23
5
1100
802
0010042487-002
202
87 90
1
0010039106-003
107
540 580
20
0010044592-003
330
97
F
881
350

Preparing for installation
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
6
2.8 Protection zone
The product contains the refrigerant R290 that has a density greater
than air. If a leak occurs, the refrigerant could accumulate near the
ground. The refrigerant must therefore be prevented from collecting in
niches, drains, gaps, other sinks, hollows or depressions in the building.
No building openings such as light shafts, hatches, valves, down pipes,
cellar entrances, windows or doors are permitted within the defined
protection zone around the product. The protection zone must not
overlap general areas or adjacent plots.
No sources of ignition such as contactors, lamps or electrical switches
are permitted within the protection zone.
2.8.1 Protection zone, ground-placed heat pump by wall
Fig. 7 Protection zone ground-placed
[A] 1000 mm
[B] 1000 mm
2.8.2 Protection zone, ground-placed heat pump free standing or
on a flat roof
Fig. 8 Protection zone ground-placed on plot or roof
[A] 1000 mm
[B] 1000 mm
[F] Front
2.8.3 Protection zone, ground-placed heat pump in a corner
Fig. 9 Protection zone ground-placed in a corner
[A] 1000 mm
[B] 2000 mm
3Preparingforinstallation
3.1 Transport and storage
DANGER
Danger to life due to fire!
The product contains the flammable refrigerant R290. If a leak occurs,
the refrigerant may form a combustible gas due to mixing with air. There
is a risk of fire and explosion.
▶ The product must be stored in a well-ventilated room without
continuous sources of ignition (e.g. an open flame, a wall-mounted
conventional gas boiler or an electric heater).
The heat pump must always be transported and stored in an upright
position. However, the heat pump may be temporarily tilted ≤ 45°, but
not laid flat.
The heat pump cannot be stored in temperatures below – 30 °C or above
+60 °C.
A A
B
0010037106-006
A
A
0010037107-005
B
F
A
0010037110-005
B

Preparing for installation
7
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
The heat pump must be stored so that it is not subject to mechanical
damage.
Use the delivered straps when transporting the heat pump without the
packaging. Remove the straps after the heat pump has been placed at
the mounting foundation.
Fig. 10 Attach the straps and remove the screws
NOTICE
Risk of damage!
The metal brackets and the wooden parts are not firmly attached to the
heat pump, there is thus a risk that it can slide while carrying.
▶ Be at least two persons while carrying the heat pump.
▶ Observe that the heat pump is heavier on the compressor side (
graphic 11).
Fig. 11 Use the straps when transporting the heat pump without
packaging
[1] Compressor side
The wooden parts, metal brackets and straps can be reused to carry the
indoor unit 12 M (Installation instructions of the Indoor unit).
Fig. 12 Wooden parts, metal brackets and straps
CAUTION
Risk of corrosion!
Corrosion, particularly on the condenser and evaporator fins, could
cause product malfunction or inefficient performance.
▶ Donotinstall theoutdoor unitinareaswherecorrosivegases,suchas
acid or alkaline gas, are produced.
▶ Do not install the product where it could be exposed to direct sea
wind (salty wind).
▶ Do not install the outdoor unit in the immediate vicinity of the sea, a
minimum distance to sea of500 m is required.ForFrance andIreland
the minimum required distance to sea is 1000 m.
3.2 Installation location
▶ The heat pump has to be placed outside, on a flat and solid surface.
▶ When positioning the heat pump, make sure that it can be accessed
at all times so that maintenance can be carried out. If access is
restricted, e.g. due to the ceiling height, a plan must be drawn up to
ensure that maintenance can be carried out without additional time
expenditure or costly aids.
▶ Attention in connection with placement must be paid to the heat
pump's sound pressure level, for example, in order to prevent
neighbours from exposure to disturbing sounds.
▶ Avoid placing the heat pump outside sound-sensitive rooms.
▶ Do not position the heat pump in a corner where it is enclosed by
walls on 3 sides as this may lead to increased noise levels and
abnormal soiling of the evaporator.
Fig. 13 Avoid placement with surrounding walls
0010044521-001
0010044710-001
1
0010048275-001
0010018524-002

Preparing for installation
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
8
▶ For freestanding heat pumps (not near buildings or on a roof):
- Protect the intake side with a wall or similar.
Fig. 14 Free standing heat pump
▶ Do not position the heat pump in a location where its front is exposed
to the wind.
▶ The heat pump must not be positioned where there is a risk of large
amounts of snow or water sliding down from the house roof. If this
cannot be avoided, a protective roof must be installed.
– Install the roof at least 1000 mm above the heat pump.
3.3 Positioning clearances
Fig. 15 Recommended space between the heat pump and surrounding solid objects (mm)
[*] Minimum clearance. The space can be reduced on the back and
one of the sides at the same time or only at the front, but please
note that this may lead to a higher noise level and/or a lower
thermal performance.
0010039864-002
1000
1000
≥
2000
(
≥
800*)
1000
≥
2000
(≥800*)
≥400
(≥
200*)
≥
2000
(
≥
400*)
≥
2000 (800*)
≥400
(≥
200*)
1000 1000
1000
1000
1000 1000
1000
1000
0010038327-006
10001000
≥400
(≥
200*)

Preparing for installation
9
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
3.4 Water quality
3.4.1 Quality requirements for the heating water
The quality of thefill and top-up water is an essential factor for increased
efficiency, functional reliability, long service life and for maintaining the
operational readiness of a heating system.
Unsuitable water can damage the heat exchanger or cause a fault in the
heat generator or DHW supply!
Unsuitable or contaminated water can lead to sludge formation,
corrosion or scaling. Unsuitable antifreeze or hot water additives
(inhibitors or anti-corrosion agents) can damage the heat generator and
heating system.
▶ Only fill the heating system with potable water. Do not use well or
groundwater.
▶ Determine the water hardness of the filling water, before filling the
system.
▶ Flush the heating system prior to filling.
▶ If magnetite (iron oxide) is present, anti-corrosion measures are
required and the installation of a magnetite separator and a de-airing
valve in the heating system is recommended.
▶ The limit values in table 3 must not be exceeded, even if national
directives contain higher limits.
Table 3 Boundary conditions for potable water (filling water)
▶ Check the pH value after > 3 months of operation. Ideally at the first
service.
Table 4 pH value ranges after > 3 months of operation
▶ Treat the fill and top up water according to the instructions in the
following section.
Depending on the hardness of the filling water, the system water volume
and the maximum heat output of the heat generator, water treatment
may be required to avoid a damage in water heating installations, due to
the formation of lime scale.
Requirements on the fill and top-up water
Fig. 16 Heat generators < 50 kW-100 kW
[x] Total hardness in °dH
[y] Maximum possible water volume over the service life of the heat
source in m3
[1] Above the curve, only use desalinated fill and top-up water, with a
conductivity of ≤ 10 μS/cm
[2] Below the curve, untreated fill and top-up water according to
drinking water regulation can be used
For systems with a specific system water content >40 l/kW, water
treatment is mandatory. If there are several heat generators in the
heating system, then the system water volume must be related to the
heat generator with the lowest output.
Table 5 Water hardness unit conversion
A recommended and approved method for water treatment is
desalination of the fill and top-up water to a conductivity of ≤ 10 μS/cm.
Prevention of corrosion
In most cases, corrosion plays only a minor role in heating systems. A
precondition for this is however, that the system is a corrosion-sealed
water heating installation. This means that there is practicallyno access
of oxygen to the system during operation.
Continuous introduction of oxygen leads to corrosion and can thus cause
rusting and rust sludge formation. Sludge formation can not only cause
blockages and therefore a diminished heat supply but also deposits
(similar to lime scale deposits) on the hot surfaces of the heat exchanger.
The amount of oxygen introduced by the fill- and top-up water are
generally very small and can therefore be ignored.
To avoid oxygenation, connection pipes must be diffusion-tight!
The use of rubber hoses should be avoided.
The intended connection accessories should be used in the installation.
During operation, pressure maintenance with regard to oxygen ingress
and in particular the function, correct sizing and correct setting (pre-
Water quality Unit Value
Conductivity μS/cm ≤ 2500
pH ≥ 6,5... ≤ 9,5
Chloride ppm ≤ 250
Sulphate ppm ≤ 250
Sodium ppm ≤ 200
Material of heat
generator
Heating water pH value range
Copper brazed
heat exchangers
•Untreated potable water
•Fully softened water
7.51) – 10.0
1) If pH value is < 8.2 an on-site test for ferrous corrosion is necessary
• Low-salt operation < 100 μS/
cm
7.01) – 10.0
Water hardness unit conversion
°dH °e °fH ppm mmol/l
1°dH= 11,25 1,8 17,8 0,1783
1°e= 0,798 1 1,4 14,3 0,142
1°fH= 0,56 0,7 1 10 0,1
1 ppm
CaCO3
(USA)
0,056 0,07 0,1 1 0,01
1mmol/l= 5,6 7,02 10 100 1
0010048707-001
0,00
0,20
0,40
0,60
0,80
1,00
1,20
1,40
1,60
1,80
2,00
2,20
2,40
2,60
2,80
3,00
0 5 10 15 20 25 30
x
y
< 50 kW
< 100 kW
1
2

Installation
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
10
charge pressure) of the expansion vessel is of highest importance.
Check the pre-charge pressure and function annually.
Furthermore, the function of automatic air vents should also be checked
during maintenance.
It is also important to check and document the top-up water quantities
via a water meter. Larger and regularly required water top-up quantities
indicate insufficient pressure maintenance, leaks or continuous oxygen
input.
Antifreeze
Unsuitable antifreeze can damage the heat exchanger or cause a fault in
the heat source or DHW supply.
Unsuitable antifreeze can damage the heat source and heating system.
Only use antifreeze as listed in the document 6720841872, which
contains antifreeze products approved by us.
▶ Only use antifreeze according to the specifications of the
manufacturer, e.g with regard to the minimum concentration.
▶ Follow the instructions of the manufacturer of the antifreeze about
regular checking of the concentration and corrective measures.
▶ The use of antifreeze reduces the efficiency.
Heating water additives
Unsuitable heating water additives can cause damage to the heat source
and heating system or cause a fault in the heat source or DHW supply.
The use of a heating water additive, e.g. corrosion inhibitor, is only
allowed, if the manufacturer of the heating water additive certifies its
suitability for all materials in the heating system.
▶ Only use heating water additives in accordance with the instructions
of its manufacturer about concentration, regular checking of the
concentration and corrective measures.
Sealants in the heating water can cause deposits in the heat generator,
therefore it is not advisable to use it.
Suitable water treatment products (inhibitors/cleaners) can be
obtained from the following manufacturers:
Follow the guidance of BS7593:20191) for treatment of water in
domestic hot water heating systems.
Table 6
3.5 Minimum volume and execution of the heating
system
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).
Check the Installer instructions for the respective Indoor unit (IDU) for
the conditions of the heating system.
4 Installation
NOTICE
Damage to the heat pump due to water!
Electrical connections and electronics can be damaged if they are
exposed to water. The outer casing is a prerequisite for meeting the heat
pump's IP rating.
▶ The heat pump must not be placed outdoors without its back panel,
side panels, front plate and roof.
▶ Mount side panels without delay after the electric connections are
done.
▶ The heat pump may not be operated without the outer casing.
CAUTION
Risk of injury!
During transport and installation there isa risk of crushing injury. During
maintenance, internal parts of the appliance may become hot.
▶ The installer is obliged to wear gloves during transport, installation
and maintenance.
CAUTION
Risc of injury!
For installation it is not necessary to remove the front panel. Access to
the refrigerant circuit and electrical cabinet is possible from the side. In
case there is a need to remove the front panel, be aware of moving parts.
Serious injury to hand or fingers may occur.
▶ Keep hands away from moving parts.
▶ Disconnect power before servicing.
4.1 Checklist
Each installation is different. The checklist below provides a general
description of the installation process.
1. Install, level and fix the heat pump on a solid surface. The drill
template on the carton box can be used for this.
2. Remove the transport fitting (screw) for the compressor plate
(bild 31).
3. Pull out the loop of the drip tray heater and push it through the drain
connector (bild 25). Attach the drain connector to the heat pump.
4. Install a condensate tube from the heat pump and possibly a pipe
trace heater (accessory heating cable instructions).
5. Connect the pipes between the heat pump and the indoor unit.
6. Connect CAN-BUS cable to heat pump and indoor unit.
7. Connect power supply of the heat pump.
1) Only applicable in the United Kingdom
ADEY 01242 546700
www.adey.com
FERNOX 0330 100 7750
www.fernox.com
SENTINEL 01928 704330
www.sentinelprotects.com/uk

Installation
11
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
4.2 Mounting the heat pump
CAUTION
Risk of trapping or injury!
The heat pump may tilt if it is not fixed correctly.
▶ Fix the heat pump to the floor.
NOTICE
Risk of Installation problems if installed on sloping surface!
The condensate drainage and functionality will be impaired.
▶ Make sure that the inclination of the heat pump in the horizontal and
vertical direction is no more than 1%.
▶ Use the drill template printed on the accessory cartonbox to position
the bolts correctly.
▶ Adjust the height using the adjustable feet so that the heat pump
does not tilt.
▶ Secure the heat pump to the ground using suitable screws.
Fig. 17 Securing the heat pump
[1] 4 pieces M10 X 120 mm (not included)
[2] Ground brackets
[3] Flat and strong surface, e.g. concrete plinths
4.3 Installation on floor stand
The heat pump can be mounted on a floor stand if a higher ground
clearence is needed. For information on how to assemble the floor stand
see the accessory manual.
Fig. 18 Heat pump on floor stand
4.4 Installation with installation kit
The heat pump can be mounted with a pipe and insulation kit both for
ground placement and wall mounted. For information on how to
assemble the kit see the accessory manual.
Fig. 19 Installations kit, ground mounted
1
2
3
0010039878-002
0010044597-001
0010044719-001

Installation
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
12
Fig. 20 Side view with installation kit
Fig. 21 Installation kit, wall hung
4.5 Assembly of wall mounted outdoor unit
CAUTION
Risk of personal injury!
The use of unsuitable fastening elements may result in personal injury.
▶ Use fastening elements suited for the wall material to mount the wall
brackets.
Fig. 22 Wall mounted outdoor unit (mm)
[1] Wall bracket (accessory)
[2] Dampers
[A] Screw the wall brackets to the wall (accessory manual)
[B] Place the outdoor unit on the wall brackets and fix the dampers
[C] Position the outdoor unit with dampers in final place and screw the
outdoor unit to the wall brackets
Make sure that the thickness of the wall is able to support the total load.
If the access to the outdoor unit is via a ladder, do not install the outdoor
unit more than 3m from the ground level.
0010047147-001
145
115
0010044720-001
B C
0010042575-003
>250
A
2
1

Installation
13
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
4.6 Foundation plan without floor stand
Fig. 23 Foundation plan, alternative 1
300
0010047403-005
300
770
<115
881
770
95
580
223
Ø100
117
1 1
1
1 1
200
95
2
2
10 mm
4X
115
110
240
330

Installation
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
14
Fig. 24 Foundation plan, alternative 2
881
770
95
580
223
117
1086
95
10 mm
4X
115
0010047404-005
110
240
330

Hydraulic connections
15
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
5 Hydraulic connections
5.1 Pipe connections, general
NOTICE
Residue in the pipework can damage the system.
Solids, metal/plastic filings, flux 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.
▶ Before connecting the heat pump and indoor unit, rinse the pipe
system to remove any foreign bodies.
NOTICE
Material damage due to frost and UV radiation!
In case of a power outage the water in the pipes may freeze.
The insulation may become brittle due to UV radiation and crack after
some time.
▶ Use insulation with a thickness of at least 19 mm for pipework and
connections outdoors.
▶ Install drain valves so that the water can be drained out of the lines to
and from the heat pump if it is not going to be used for some time or
if there is a risk of frost.
▶ Use UV and moisture-resistant insulation.
Insulation/gaskets.
▶ All heat-bearing lines must be fitted with suitable heat insulation in
accordance with applicable standards.
▶ In cooling mode, all connections and lines must be insulated
according to applicable standards to prevent condensation.
▶ Insulate the wall insertion.
Dimension the pipes according to the instructions (installation
instructions for the indoor unit).
▶ Avoid splicing the heat transfer pipes to minimise pressure drop.
▶ Use PEX pipes for all connections between the heat pump and indoor
unit.
▶ Use only material (pipes and connections) from the same PEX
distributor to avoid leakage.
▶ Pre-insulated AluPEX pipes are recommended since they make
installation easier and prevent gaps in the insulation. PEX or AluPEX
pipes also devibrate and insulate against noisetransfertothe heating
system.
If a different material than PEX is used, the following is required:
▶ Install a particulate filter intended for outdoor use on the heat pump
return line, directly on the heat exchanger.
▶ Insulate the particle filter as other connections.
▶ Devibrate theheat pumpconnection witha hose intendedforoutside
use and insulate it.
5.2 Drain for condensate
NOTICE
Damage due to risk of frost!
If the condensate freezes and cannot be routed away from the heat
pump, the evaporator may be damaged.
▶ Always install pipe trace heating if ice is likely to form in the
condensate hose.
The product contains the refrigerant R290. In the event of a leak, the
refrigerant may end up in the ground via the condensate drain.
▶ Use a frost free siphon if the condensate pipe is connected to an
existing outlet pipe / rain drainage.
Condensate must be routed away from the heat pump via a frost-free
drain; the drain must slope sufficiently to prevent water from
accumulating in the pipe.
The condensate can be drained into a gravel bed or culvert.
A loop of the drip tray heater cable can be pulled out approx. 50 cm and
pushed into the drain pipe. This only applies if pipe trace heating is not
used.
The drain pipe must have a larger diameter than the drain connector and
not be fitted to each other.
Fig. 25 Installation of drain connector
[1] Loop of drip tray heater cable
[2] Drain connector
0010042509-003
1
2

Hydraulic connections
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
16
Fig. 26 Condensation drain in sewage / rain drainage
[1] Siphon
Fig. 27 Condensation drain in gravel bed
[1] Concrete plinths
[2] Shingle 300 mm
[3] Condensation water pipe Ø 100 mm
[4] Gravel bed
5.3 Connect the heat pump to the indoor unit
NOTICE
Material damage due to excessively high tightening torque!
If connections are tightened too tightly, the heat exchanger may be
damaged.
▶ When installing the connections, the tightening torque should be no
more than 150 Nm.
Short connections outside reduce heat loss. Pre-insulated pipes are
recommended.
▶ Connect the flow line to the indoor unit to the heat transfer medium
outlet ([1], Figure 28).
▶ Connect the return line from the indoor unit to the heat transfer
medium inlet ([2], Figure 28).
▶ Tighten the heat transfer medium pipe connections with a 120 Nm
torque. Use a second wrench to apply counter torque while
tightening.
If the connection does not seal properly, the connector can be
torque-tightened to a maximum of 150 Nm. If the connection still
does not seal properly, this is indicative of damage to a gasket or
connecting pipes.
Fig. 28 Heat transfer medium pipe connections; description applies to
all sizes
[1] Heat transfer medium outlet (to indoor unit) DN25
[2] Heat transfer medium inlet (from indoor unit) DN25
0010042191-001
1
900 mm
2
4
3
11
0010039882-002
0010039883-001
1 2

Side cover and transport fitting
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AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
6 Side cover and transport fitting
▶ Remove the side cover.
Fig. 29 Side cover
The heat pump is equipped with a transportation screw. The
transportation screw prevents the heat pump from being damaged in
transit.
▶ Open the refrigerant box.
Fig. 30 Refrigerant box cover
▶ Unscrewthetransport screwand remove ittogetherwiththe marking
strap.
Fig. 31 Transportation screw
[1] Transportation screw, remove at installation
▶ Put back the cover for the refrigerant box.
7 Electrical connection
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 sensor cable and shielded CAN-BUS cable separately to power
cables. Maintain a minimum distance of 100 mm. The BUS cable can
be routed together with sensor cables.
The unit's electrical connection must be able to be disconnected safely.
▶ Install a separate safety switch that disconnects all power to the heat
pump. The safety switch shall be an over voltage category III
appliance.
▶ 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 more
users can be connected.
▶ Install a separate residual current device according to applicable
standards in each country. As manufacturer, we recommend a Type B
AC/DC sensitive residual current device to be used for the appliance
due to an inverter in heat pump.
7.1 CAN-BUS
NOTICE
The system will be damaged if the 24VDC- and the CAN-BUS
connections are incorrectly connected!
The communication circuits are not designed for 24VDC constant
voltage.
▶ Check to ensure that the cables are connected to the contacts with
the corresponding markings on the modules.
NOTICE
Malfunction due to mixed up connections!
If the “High” (H) and “Low” (L) connections are mixed up, there is no
communication between the heat pump and the indoor unit.
▶ Check to ensure that the cables are connected to the connections
with the corresponding markings in both ends of the CAN-BUS cable.
0010040404-001
2.
1.
0010040427-001
0010040016-004
1

Electrical connection
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
18
Fig. 32 CAN-BUS heat pump - indoor unit
[A] Heat pump
[B] Indoor unit
[Vcc] 24V= (24VDC)
[H] HIGH
[L] LOW
[GND] gnd
The heat pump and indoor unit are connected to each other by a
communication line, the CAN-BUS [24VDC, class III (SELV)].
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 maximum permissible cable length is 30 m.
The connection is made with four wires, as the 24VDC supply is also
connected. The 24VDC and CAN-BUS connections are marked on the
module.
The CANBUS cable has two pairs of twisted wires. Vcc and GND is one
pair, H and L is the second pair. Maximum cable insulation striping length
for all cables is 120mm. Maximum wire striping is between 8-10mm.
Fig. 33 Wire striping CAN-BUS
7.2 Connect the heat pump
Properstrain-reliefof theelectric cablesmust beensured.Use cable-ties
to fasten the cables on the back plate of the electric box.
▶ Route the connection cables through the cable ducts.
– Remove the rubber grommet from the outdoor unit for the
respective cable.
– Pierce the rubber grommet and place it on the cable.
– Feed the cable through the cable channel so that a sufficient part
of it comes through.
– Remount the rubber grommet in the hole on the outdoor unit.
▶ Connect the cables according to the wiring diagram.
▶ Tighten the cable-ties firmly.
▶ Reattach the side cover.
Fig. 34 Cable channels
[1] CAN-BUS
[2] Mains feed
B
GND
L
H
Vcc
Vcc
L
H
GND
HIGH LOW gnd
CAN BUS
1234
HIGH LOW gnd
CAN BUS
1234
24V=
A
0010049010-001
≤10 mm
≤120 mm
0010041915-001
0010043069-001
1 2

Electrical connection
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AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
Fig. 35 Electrical box
[1] CAN-BUS connection
[2] Cable ties for the cables
[3] Mains feed connection
Fig. 36 Wire striping mains feed connection
Fig. 37 Heating cable connection (accessory)
N
L1
L1
1L1
2L1
3L1
2F1
1F1
F1
1N
2N
3N
R1
GND
L
H
Vcc
N
0010039885-005
1
3
2
CANBUS
L1
1L1
2L1
3L1
2F1
1F1
F1
1N
2N
3N
R1
GND
L
H
Vcc
N
Vcc
L
H
N
1N
2N
3N
GND
F1
L1
1L1
2L1
2F1
1F1
3L1
R1
≤10 mm
≤120 mm
0010048455-001
L1
1L1
2L1
3L1
2F1
1F1
F1
1N
2N
3N
R1
GND
L
H
Vcc
N
Vcc
L
H
N
1N
2N
3N
GND
F1
L1
1L1
2L1
2F1
1F1
3L1
R1
0010050294-001

Maintenance
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
20
8 Maintenance
DANGER
Danger to life due to fire!
The product contains the flammable refrigerant R290. If a leak occurs,
the refrigerant may form a combustible gas due to mixing with air. There
is a risk of fire and explosion.
▶ Only personnel with special training for refrigerant R290 may
perform work on the refrigerant circuit.
▶ Wear personal protective equipment.
▶ Have access to a fire extinguisher.
▶ Check that tools and equipment are faultless and approved for
refrigerant R290.
DANGER
Electrical shock!
The heat pump contains current-carrying components and the heat
pump capacitor must be discharged once the power supply has been
disconnected.
▶ Isolate the system from the supply.
▶ Wait at least five minutes before carrying out electrical work.
NOTICE
Malfunction due to damage!
The electronic expansion valves are highly sensitive to impacts.
▶ Always protect the expansion valve from impacts and shock.
NOTICE
Deformation due to heat!
If the temperature is too high, the insulation material (EPP) in the heat
pump deforms.
▶ Remove as much insulation (EPP) as possible before carrying out
soldering work.
▶ When carrying out soldering work in the heat pump, protect the
insulation material with heat-resistant materials or a moist cloth.
▶ Use only original spare parts!
▶ Order spare parts using the spare parts list.
▶ Remove and replace old seals and O-rings with new ones.
During service, the activities described below should be performed.
Show activated alarms
▶ Check the alarm log (control unit manual).
Function check
▶ Perform function check (indoor unit manual).
Power cable routing
▶ Check whether the electrical cable has mechanical damage.
▶ Replace damaged cables.
Evacuate refrigerant
▶ This action may only be carried out by trained personnel with
knowledge of the properties of and risks associated with the
refrigerant R290.
▶ Wear personal protective equipment and have a fire extinguisher to
hand.
▶ Only use tools and equipment approved for refrigerant R290.
▶ Followthesafetyinstructions [6721836841]on howthe refrigerant
is to be evacuated from the product.
▶ Recycle the refrigerant according to applicable regulations.
8.1 Cleaning of the drip tray
Use a brush and a cloth with a mild detergent when cleaning. Do not use
a water hose.
1. Take off the left side cover.
2. Unscrew the screw holding the EPP parts together.
Fig. 38 Unscrew
3. Take out the two EPP parts.
Fig. 39 EPP parts
0010044598-001
1.
2.
0010044599-001