Ochsner AIR 85 User manual

TRANSLATION OF THE ORIGINAL MANUAL
HIGH EFFICIENCY AIR/WATER HEAT PUMPS
DESIGN AND INSTALLATION
MANUAL
►
AIR 85

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CONTENTS
PLEASE NOTE
1. Information on documentation 4
1.1 Safety information 4
1.1.1 Arrangement of safety information 4
1.1.2 Symbols and possible dangers 4
1.1.3 Keywords 5
1.2 Other symbols 5
1.3 Units of measurement 5
1.4 Specied performance gures 5
2. Safety 6
2.1 Intended use 6
2.2 General safety information 6
3. How split systems work 8
4. Appliance description 10
4.1 Scope of delivery 10
4.2 Indoor unit hydraulics 10
4.3 Appliance components 10
4.3.1 Indoor unit 10
4.3.2 Outdoor unit 10
4.3.3 Heat pump control unit 11
4.4 Name plate 11
ENGINEERING OF A SPLIT SYSTEM
5. Outdoor unit 12
5.1 Installation location 12
5.2 Minimum clearances 12
5.3 Foundation for the outdoor unit 12
5.4 Sound 13
6. Refrigerant lines 13
6.1 Preparing the refrigerant lines 13
6.1.1 Line lengths 14
6.1.2 Refrigerant pipes passing through open air 14
6.2 Wall conduit 14
7. Indoor unit 15
7.1 Installation location 15
7.2 Maintaining minimum clearances 15
8. Machine-specific engineering and preparation
16
8.1 Outdoor unit 16
8.1.1 Installation location 16
8.1.2 Minimum clearances 16
8.1.3 Installation in coastal areas 17
8.1.4 Foundation for the outdoor unit 17
8.2 Refrigerant lines 19
8.2.1 Line lengths and height di󰀨erentials 19
8.2.2 Material requirements 19
8.3 Indoor unit 20
8.3.1 Minimum clearances 20
8.3.2 Minimum area of clear oor space in the installation room
20
8.4 Preparing the electrical connection 20
8.4.1 Heat pumps for three-phase power supply 21
8.4.2 Cables from main distributor to indoor unit 22
8.4.3 Cables from indoor unit to sensors and actuators 22
8.4.4 Cables from indoor to outdoor unit 22
8.4.5 Temperature sensor 22
8.4.6 Pumps and servomotors (230 VAC) 23
8.4.7 PSU signal contact 23
8.4.8 Smart grid 23
8.4.9 High limit safety cut-out 23
INSTALLATION
9. Appliance installation 24
9.1 Installation of indoor unit 24
9.1.1 Delivery and transportation 24
9.1.2 Removing the transport packaging 24
9.1.3 Fitting the adjustable feet 25
9.1.4 Positioning the appliance 25
9.1.5 Dismantling the appliance casing 25
9.1.6 Assembling the appliance casing 28
9.2 Installing the outdoor unit 29
9.2.1 Delivery and transportation 29
9.2.2 Fitting the outdoor unit feet 29
9.2.3 Connecting the appliance halves 30
9.2.4 Positioning the appliance 30
9.2.5 Dismantling the appliance casing 30
9.3 Connecting the heat sink system 30
9.3.1 Flow rate 31
9.3.2 Connecting the heating water 31
9.3.3 Safety valve drain 32
9.3.4 Filling the heating system 32
9.3.5 Diaphragm expansion vessel (DEV) 32
9.3.6 Cooling version 32
10. Electrical connection 33
10.1 General 33
10.2 Electrical connection of the indoor unit 33
10.3 Electrical connection of the outdoor unit 35
11. Initial start-up 36
11.1 Before initial start-up 37
11.2 Testing the control circuit 37
12. Completion and commissioning 37
12.1 Requirements 37
12.2 System completion 38
12.3 Commissioning the system 39
12.3.1 Activities carried out by OCHSNER 39
SPECIFICATION
13. Data table 40
13.1 Temperature sensor pressure drop curve 42
13.1.1 Indoor unit 42
13.1.2 Outdoor unit 42
14. Limits of use for heating 43
15. Limits of use for cooling 43
16. Performance diagram for heating 43
17. Performance diagram for cooling 44
18. System principle schematic 46
18.1 Heat consumption 46
19. Voltage quality in isolated mode 48
20. Dimensions and connections 49
20.1 Indoor unit 49
20.2 Outdoor unit 50
20.2.1 Outdoor unit with Super Silent Package (SSP) 51
ENVIRONMENT AND RECYCLING

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Information on documentation
PLEASE NOTE
►Connection to the mains electricity supply must be
by means of a xed connection. It must be possible
to isolate the appliance from the mains supply with
a multi pole switch which has a gap of at least 3 mm
across all poles.
►You must not disconnect the power supply even if
heating is not required. If the power supply is discon-
nected, active frost protection of the system cannot
be guaranteed.
►You do not need to switch o󰀨 the system for the
summer. The heat pump controller changes over au-
tomatically between summer and winter.
►Observe the minimum clearances in order to ensure
fault-free operation of the appliance and to allow for
maintenance work on the appliance.
►In bivalent mode, the return water from the second
heat generator can ow through the heat pump. Note
that the return water temperature must not exceed
65°C.
►Maintenance work such as checking the electrical
safety of the appliance may only be carried out by a
qualied contractor.
►We recommend an annual inspection (to assess the
appliance’s actual state) and if necessary any main-
tenance (to reinstate it to its expected state) by a
qualied contractor.
►We guarantee trouble-free function and operational
reliability only if the original accessories and spare
parts intended for the appliance are used.
►Observe all applicable national and regional regula-
tions and provisions.
1. Information on documentation
This documentation is aimed at qualied contractors and
specialist design engineers. It is not intended for use by
appliance user.
Unless otherwise stated, all content of this documentation
applies to the following appliances:
Appliance Article number
AIR 85 C14A 288800V
This documentation describes appliances that are not al-
ways in the standard scope of delivery. Therefore there
may be di󰀨erences to your specic appliance.
Information
Read all of this documentation carefully before us-
ing the appliance and keep the documents safe.
Pass this documentation on to any new user.
Information
A separate operating manual is available for op-
erating the system. This also includes the ERP
data. This document is attached to the machine
in printed form or can be found in digital form on
the OCHSNER homepage in the download area.
1.1 Safety information
1.1.1 Arrangement of safety information
KEYWORD: Type of risk
The possible consequences of not observing the
safety information are shown here.
»
Instructions for action to remedy or remove
the source of danger are shown here.
1.1.2 Symbols and possible dangers
Symbol Type of risk
Injury
Electrocution
Burns
(burns, scalding)
Material damage
(appliance, consequential and environmental dam-
age)

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Information on documentation
1.1.3 Keywords
Keyword Meaning
DANGER Failure to observe this information will result in seri-
ous injury or death.
WARNING Failure to observe this information may result in se-
rious injury or death.
CAUTION Failure to observe this information may result in
non-serious or minor injury.
1.2 Other symbols
►This triangular symbol is used as a bullet point.
»
These two arrows represent the symbol for an in-
struction. This shows that there is something you
must do. The actions required are described step by
step.
 These symbols show you the level of a software
menu. In this example, 3 menu levels are
indicated.
Symbol Notes
Must not be disposed of with household waste
Low flammability
Additional documents are available and must be
used
1.3 Units of measurement
Information
In these documents, unless otherwise specied, all
lengths (e.g. in tables and illustrations) are given
in millimetres.
1.4 Specied performance gures
The performance gures of the appliance indicated in
these documents (text, tables and diagrams) have been
calculated according to standardised measurement con-
ditions. However, these measurement conditions often do
not completely correspond to the plant-specic conditions
applicable in the respective user’s system. System-specic
factors that can a󰀨ect the conditions include, for example,
the specic design of the system, the age of the system
and the actual ow rates. For this reason, the stated perfor-
mance gures can di󰀨er from plant-specic performance
data.
The stated performance gures can be conrmed only
if the measurements taken for the appliance are carried
out according to the relevant standardised measurement
conditions.

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Safety
2. Safety
2.1 Intended use
The appliance is intended for use in a domestic environ-
ment. It can safely be used by people who have received
no instruction. The appliance can similarly be used in a
non-domestic environment such as commercial premises,
as long as it is used in the same intended manner.
Any use of the appliance that is di󰀨erent from or goes
beyond this is not regarded as intended use. Intended use
also includes observing this documentation and the docu-
mentation for operation and any accessories used.
2.2 General safety information
Observe the following safety information and instructions
for the appliance.
►Only qualied contractors should carry out the elec-
trical work and installation of this appliance. Only
qualied contractors may open the appliance.
►Commissioning of the appliance may be carried out
only by OCHSNER Customer Service or by customer
service partners authorised by OCHSNER.
►The qualied contractor is responsible for compliance
with all relevant regulations during installation and
commissioning.
►Only operate the appliance when it is fully installed
and with all safety devices tted.
►Protect the appliance from dust and dirt ingress dur-
ing building work.
►Alterations to the appliance may only be carried out
by OCHSNER Customer Service or by customer ser-
vice partners authorised by OCHSNER.
►Functions to protect the heat pump can be enabled
using the controller. However, since the controller
is not certied as a safety device, safety measures
in case of breakdown or damage to the heat pump
(e.g. additional external switching of the safety devic-
es in use) must comply with local regulations. In the
case of upgrades or updates to the controller soft-
ware, all function parameters of the heat pump must
be checked.
►Before commencing electrical connection and instal-
lation work, the heat pump system must be isolated
from the power supply.
►The appliance must not be used as a step or plat-
form. Do not climb on the appliance or place any
loads on it.
►The appliance may be used by children aged 8 and
up and people with reduced physical, sensory or
mental capabilities or a lack of experience provided
that they are supervised or that they have been in-
structed on how to use the appliance safely and have
understood the possible risks. Children must not be
allowed to play with the appliance. Children must not
be allowed to clean or carry out user maintenance on
the appliance without supervision.
►The controller, auxiliary modules, plug-in strips and
controller cables can also be supplied with voltage by
means of external switching (safety cut-out devices,
etc.), if the controller is not connected or no mains
voltage is present at the controller.
►The heat pump has no separate ON/OFF switch. In
an emergency, the system must be shut down via the
specied safety devices.
►If the system has obvious damage, makes a noticea-
ble noise or emits smoke, switch o󰀨 the system and
contact OCHSNER Customer Service immediately.
►Contact with refrigerant can cause serious injuries.
- In the event of a leak, avoid contact with the
refrigerant.
- Bear in mind that refrigerant can be odourless.
►In the event of a fault, refrigerant could enter the
working area through the heat sink system.
- Do not use an open ame within 20 cm of the
quick-action air vent valve and the safety valve
outlet.
- Ventilate the installation room well when enter-
ing it.

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How split systems work
3. How split systems work
An air/water heat pump extracts thermal energy from the
ambient air (low temperature) and transmits it together with
electrical drive energy in the form of useful heat (higher
temperature) to a heating and/or DHW circuit.
The heat pump consists of separated circuits linked togeth-
er via heat exchangers:
►Heat source circuit (extracting heat)
►Refrigerant circuit
►Heat sink circuit (supply of heat for room heating and/
or DHW)
Outdoor air is a heat source that is available everywhere
in unlimited amounts and can be utilised without approval.
It is especially suitable for retrotting.
A split system consists of an indoor unit and a separately
installed outdoor unit. The outdoor air is routed through the
outdoor unit by means of a fan. The indoor and outdoor
units are connected through refrigerant lines.
Due to the defrosting mode integrated into OCHSNER air/
water heat pumps, the system also operates awlessly at
temperatures below -15°C.
For air/water heat pumps, the most e󰀩cient and therefore
most common operating mode is bivalent parallel opera-
tion.
Due to the integral defrosting mode, the monovalent op-
erating mode is also possible. As the heating output of an
air/water heat pump at an outdoor temperature of +15°C
is approx. triple the heating output at -15°C, such systems
are vastly oversized for operation in spring and autumn
and therefore not recommended.
1 Evaporator (outdoor unit)
2 Compressor
3 Condenser (plate heat exchanger)
4 Expansion valve
5 Heat sink (heating, DHW)

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How split systems work

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Appliance description
4. Appliance description
4.1 Scope of delivery
The scope of delivery of your appliance includes the fol-
lowing components:
►1 indoor unit:
The following components are installed in the indoor
unit:
- Starting current limiter
- Master controller
- OTE heat pump controller
- Compressor
►1 outdoor unit:
The outdoor unit comprises a left-hand and a right-
hand part. These are connected via a connection line
for suction gas and liquid lines. The following compo-
nents are installed in the outdoor unit:
- Evaporator
- Expansion valve
- Fan
►1 ow meter (heat sink side)
►2 exible hoses
►1 outdoor temperature sensor (TA)
►1 contact sensor:
For a mixed circuit (TMK)
►2 pocket sensors:
For a heat pump bu󰀨er tank (TPO, TPM)
►1 pocket sensor:
For a DHW tank (TB)
4.2 Indoor unit hydraulics
The system must be engineered using an OCHSNER
standard hydraulic schematic or an OCHSNER special
hydraulic system.
1 Suction gas line
2 Liquid line
3 Heating water ow
4 Heating water return
5 Heat exchanger (heat sink side)
4.3 Appliance components
4.3.1 Indoor unit
The indoor unit is intended to be installed inside the build-
ing only. The indoor unit contains the compressor which
is acoustically decoupled from casing at multiple points.
The casing is acoustically optimised and allows particularly
quiet operation.
Compressor:
The fully hermetically sealed compressor is designed for
high e󰀩ciency heat pump applications. A suitable starting
current limiter for the compressor is installed in the indoor
unit.
Condenser:
The condenser takes the form of a plate heat exchanger.
The plate heat exchanger is built of stainless steel (alloy
316) and insulated on all sides against condensation and
heat loss.
4.3.2 Outdoor unit
The outdoor unit is intended to be installed outside. The
outdoor unit is designed as a horizontal split evaporator.
The indoor unit is connected to the outdoor unit with refrig-
erant lines, along with electrical control and power supply
cables.
Evaporator:
The evaporator is part of the outdoor unit and consists of
copper pipes in a set of aluminium ns.

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Appliance description
Information
With an air/water heat pump, frost may form on
the evaporator ns of the outdoor unit, depending
on the air temperature (below approx. +7°C), air
humidity and the operating point. The evaporator
ns are automatically de-iced again in cyclical de-
frosting mode of the heat pump.
Fan:
The outdoor air is drawn through the evaporator by a quiet
fan.
4.3.3 Heat pump control unit
The OCHSNER heat pump controller includes devices
capable of controlling heat pump heating systems with a
cooling function as well as DHW heating. In its standard
version, the heat pump control unit consists of the OTE
controller and the master controller, both of which are in-
stalled in the indoor unit.
The OTE controller can control the following system circuits
and heat generators:
►1x direct circuit (heating and/or cooling)
►1x mixed circuit (heating and/or cooling)
►1x directly heated DHW tank (with electric auxiliary
heater)
►1x heat pump (heating and cooling)
►1x additional heat generator (electric auxiliary heater
or enable contact for external heat generator)
4.4 Name plate
To identify your heat pump, name plates are attached to
the indoor and outdoor unit.
1 Name plate on indoor unit
1 Name plates on outdoor unit

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Outdoor unit
ENGINEERING OF A
SPLIT SYSTEM
Information
The machine-specic information on engineering
and preparation can be found in this document’s
machine-specic engineering and preparation sec-
tion.
Information
Plan the installation sites for the outdoor and indoor
units so that the refrigerant lines are as short as
possible and the pipes are routed as straight and
simply as possible.
Information
If the pipe liner is laid empty, inserting the refriger-
ant lines afterwards will be di󰀩cult if not impossible,
depending on the position layout of the connection
line.
»
When laying refrigerant lines in the ground,
schedule the work so that the pipe liner can
be laid together with the pre-inserted refrig-
erant lines in the trench between the outdoor
and indoor units.
Information
Observe national and regional regulations regard-
ing the requirement for and design of lightning
protection.
Information
Observe the machine-specic limits of use.
5. Outdoor unit
5.1 Installation location
The outdoor unit is intended to be installed only out of
doors. Please note the following with regard to the instal-
lation location of the outdoor unit:
►Select the outdoor unit installation location so that the
appliance can be safely accessed from all sides all
year round.
►Installation in a hollow or ditch is not permissible (cold
air pocket).
►High wind loads on the outdoor unit can cause
problems with defrosting in defrosting mode. Avoid
installation in an open and exposed location with high
expected wind loads (e.g. at roof of a house in a
raised location).
►Select an installation location where the appliance is
on the side of the building facing away from the wind
(“leeward side”).
Material damage
The air ow through the evaporator must not be
obstructed by surrounding buildings. A reduced air
ow rate can lead to loss of e󰀩ciency in the system.
»
Observe the machine-specic requirements
regarding the installation location.
Material damage
The intake air must not be contaminated with corro-
sive substances (ammonia, sulphur, chlorine, etc.).
This can destroy machine components.
5.2 Minimum clearances
Observing the specied minimum clearances for the out-
door unit ensures:
►Correct installation of the appliance
►That it operates fault-free
►Ability to carry out maintenance on the appliance
»
Observe the machine-specic minimum clearances.
5.3 Foundation for the outdoor unit
A permanent foundation is required beneath the outdoor
unit. The foundation must meet the structural requirements
of the outdoor unit.
»
Provide frost-free drainage (e.g. a gravel bed con-
nected to a drain) for condensate that forms on the
outdoor unit.
»
Where refrigerant lines are to be laid in the ground,
ensure correct positioning of the pipe liner when lay-
ing the foundations.
»
Use rigid underground sewer pipes (with a smooth
inner surface) for the pipe liner.
»
Ensure that the outdoor unit is adequately secured,
with regard to the wind load occurring at the installa-
tion location.
»
When constructing the foundations, observe the ma-
chine-specic guidelines.

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Refrigerant lines
CAUTION: Risk of slipping
If drainage for condensation is inadequate, ice can
build up in winter in the area around the outdoor
unit.
»
Ensure drainage for condensation is su󰀩cient
even at low temperatures.
»
Ensure that no ice is formed, especially on
paths and entrances around the outdoor unit.
Information
Insulation used beneath the soil must be of a
closed-cell material construction. Otherwise, the
thermal insulation value of the material will be im-
paired.
5.4 Sound
Please note the following with regard to sound emissions
from the outdoor unit:
►Avoid installing on reverberant ooring.
►Avoid installing between two building walls or in cor-
ners. Walls can increase the noise level.
►Avoid placing the unit directly below or next to rooms
that are sensitive to sound (e.g. bedrooms).
Information
Plants and cultivated areas around the outdoor
unit, subject to minimum clearances, can reduce
its noise level.
Information
The maximum permitted sound levels are partly
subject to legal limitations.
»
Observe all applicable national and regional
regulations and provisions.
6. Refrigerant lines
6.1 Preparing the refrigerant lines
Information
Only OCHSNER customer service or authorised
OCHSNER customer service partners may con-
nect the refrigerant lines to the indoor and outdoor
units.
Information
If the appliance, the refrigerant lines, the pipe
xings and the wall conduits are not installed cor-
rectly, structure-borne sounds can be transmitted
to the building.
»
Ensure that the refrigerant lines are in-
stalled in a way that ensures insulation from
structure-borne noise. The system installer
carrying out the work is responsible for this.
»
Never lay the refrigerant lines in a bricked-in
sleeve tube. Noise transmission to the living
space is unavoidable when bricked-in sleeve
tubes are used, due to the resonating body
e󰀨ect.
»
Use insulating refrigerant pipe clamps for ver-
tical installation of the refrigerant lines. The
distance between the refrigerant pipe clamps
must not exceed 1.25 m.
Material damage
Thin-walled pipes are at risk of bursting.
»
Only use copper pipes suitable for refrigerant
(EN 12735-2).
Material damage
Dirt and contamination in the refrigerant lines can
result in a clogged expansion valve or compressor
damage.
Incorrect or premature opening of the refrigerant
connections can allow dirt and moisture to enter
the refrigerant circuit.
»
Only use copper pipes suitable for refrigerant
(EN 12735-1).
»
Do not open the connections on the indoor
and outdoor units.
»
Ensure that no dirt enters the refrigerant
pipes.
Information
Systems with incorrectly sized refrigerant pipes
cannot be commissioned.
»
Observe the machine-specic dimensions for
the refrigerant pipes.
The refrigerant connections (suction gas and liquid lines)
on the indoor and outdoor units are supplied soldered
closed.
Information
Appropriate copper pipes for refrigerant lines are
supplied sealed at both ends and lled with nitro-
gen.
Please note the following with regard to routing of the re-
frigerant pipes:

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Refrigerant lines
»
Keep the distance between the indoor and outdoor
units to a minimum to prevent heat loss from the re-
frigerant pipes.
»
Select the installation sites for the indoor and outdoor
units so that the maximum permissible line lengths
and height di󰀨erentials are observed.
»
Avoid routing the lines in the vicinity of rooms that are
sensitive to sound (e.g. bedrooms). The refrigerant in
the lines can generate noise under certain operation-
al conditions.
»
Use the largest possible bending radii to avoid high
pressure losses.
6.1.1 Line lengths
»
Observe the maximum permissible line lengths for
the refrigerant lines.
»
Observe the maximum permissible height di󰀨erential
between the indoor and outdoor units.
Information
The machine-specic information on engineering
and preparation can be found in this document’s
machine-specic engineering and preparation sec-
tion.
6.1.2 Refrigerant pipes passing through open air
1 Appropriately sealed wall conduit (particularly where
there is a risk of ooding)
2 Appropriate sealing of the refrigerant lines as they
pass through the wall conduit
3 Refrigerant lines in open air (enclosed in thermal in-
sulation with UV protection)
4 Reinforced strip foundation
5 Drainage pipe (frostproof)
6 Foundation
Information
All solder joints on the refrigerant copper pipework
must be accessible all year round for mainte-
nance purposes (according to Regulation (EU) No
517/2014).
»
Run the refrigerant pipes between the indoor and out-
door units.
»
Allow some surplus length in the refrigerant pipes
between the connections at the indoor and outdoor
units.
»
Use suitable sound-insulating pipe xings to secure
the refrigerant pipes.
»
Do not install the pipe xings in the vicinity of bending
radii.
»
Insulate the refrigerant pipes with suitable insulating
material where they pass through open air between
the indoor and outdoor units, to prevent the forma-
tion of condensation. When passing above ground
outside, the insulating material must also have UV
protection.
Information
Where the refrigerant pipes run horizontally through
open air, use suitable supports. Take steps to pre-
vent above-ground refrigerant pipes from being
walked or driven on.
6.2 Wall conduit
Whether the refrigerant pipes between the indoor and
outdoor units are to be routed above or below ground,
appropriate and system-specic wall conduits need to be
created through the outer wall of the building.
»
Ensure that the wall conduit is installed in an appro-
priate, plant-specic position layout.
»
Take the construction of the wall (tiles, concrete) into
account.
»
Take the prevailing groundwater situation into
account.

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Indoor unit
Material damage
Inadequate wall conduits can cause signicant
damage to property, due to water penetrating the
building or stonework (seepage, condensation,
ood water). With wall conduits created below
ground level, the breach must be appropriate to
local conditions at the site (e.g. non-accumulating
or accumulating seepage water, groundwater un-
der pressure).
»
Use a suitable pipe liner or wall sleeve for the
wall conduit.
»
Integrate the external end of the wall conduit
into the external waterproof seal of the build-
ing.
»
Ensure that the pipe liner is arranged with a
slight fall (at least 2%) to the outside.
»
Use appropriate ring seals to seal the space
between the wall sleeve and the refrigerant
pipes and electrical cables passing through,
on both the outer and inner edge of the wall.
Material damage
PU foam is not suitable as a sealant for the pipe
liner.
7. Indoor unit
7.1 Installation location
Material damage
The indoor unit is intended to be installed inside the
building only. It must not be installed in rooms with
high levels of humidity (permanently above 70%).
The installation room for the indoor unit must meet the
following requirements:
►A dry and frost-free room
►Sound optimised environment
►A horizontal oor with adequate load bearing capacity
for the weight of the indoor unit
►Not directly below or next to rooms that are sensitive
to sound (e.g. bedrooms)
►Max. room temperature 30°C
►Installation room must not be subject to a risk of ex-
plosion arising from dust, gas or vapour
7.2 Maintaining minimum clearances
Observing the specied minimum clearances for the indoor
unit ensures:
►Correct installation of the appliance
►That it operates fault-free
►Ability to carry out maintenance on the appliance
»
Observe the machine-specic minimum clearances.
Information
The machine-specic information on engineering
and preparation can be found in this document’s
machine-specic engineering and preparation sec-
tion.

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Machine-specic engineering and preparation
8. Machine-specic engineering
and preparation
Material damage
Air pressure and air humidity will a󰀨ect the opera-
tional reliability of the electrical components in the
heat pump system (dielectric strength).
»
Observe the maximum installation altitude of
the heat pump system.
Unit Max. installation altitude (above
sea level)
AIR 85 m 1000
8.1 Outdoor unit
8.1.1 Installation location
►The outdoor unit must not be surrounded by walls/
objects on all four sides.
►The outdoor unit must not be surrounded by walls/
objects on three sides.
►The outdoor unit must not be positioned immediately
adjacent to walls/objects on two sides.
►The outdoor unit may be positioned adjacent to walls/
objects on two sides, provided the machine-specic
minimum clearances are observed.
►It is permissible to install the outdoor unit under a roof
if the unit is permanently surrounded by open space
on three sides and the machine-specic minimum
clearances are observed.
8.1.2 Minimum clearances
ABC Minimum clearance
between outdoor
units
Unit
AIR 85 ≥ 3 ≥ 1 ≥ 1 ≥ 1 m

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Machine-specic engineering and preparation
8.1.3 Installation in coastal areas
Please note the following with regard to installation in
coastal areas:
►The standard version of the outdoor unit must be in-
stalled at least 1 km from the sea.
►Outdoor units with special coating, suitable for coast-
al locations, must be installed a minimum of 200 m
from the sea.
►The installation location selected should always be on
the leeward side of the building (the side facing away
from the sea).
8.1.4 Foundation for the outdoor unit
Spot foundation
1 Gravel bed
2 Drainage pipe (frostproof)
3 Spot foundation (with underground sewer pipe)
ABCD
AIR 85 1870 250 935 2045
Use underground sewer pipes when installing spot foun-
dations.
When installing spot foundations, we recommend the fol-
lowing approach:
»
Dig out the foundation trench.
»
Lay the underground sewer pipes in position.
»
Ensure correct horizontal and vertical positioning of
the underground sewer pipes.
»
Place a drainage pipe along the base of the trench.
1 Underground sewer pipe
2 Drainage pipe (frostproof)
3 Gravel bed
»
Fill the foundation trench with coarse gravel.
»
Fill the underground sewer pipes with concrete.

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Machine-specic engineering and preparation
Strip foundation
1 Gravel bed
2 Drainage pipe (frostproof)
3 Strip foundation
A B
AIR 85 2250 1135
When laying strip foundations we recommend the following
approach:
»
Dig out the foundation trench.
»
Place a drainage pipe along the base of the trench.
1 Reinforced strip foundation
2 Drainage pipe (frostproof)
3 Gravel bed
»
Fill the foundation trench with coarse gravel.
»
Construct the two reinforced strip foundations.
Installing on at roofs
WARNING: Risk of falling
Working on a at roof without fall protection con-
stitutes a risk.
»
When working on a at roof, observe the laws
relating to occupational safety in your region.
»
Always be aware of the open edge.
Information
Avoid installing the outdoor unit on the roof above
residential buildings or on car ports attached to res-
idential buildings, due to the risk of structure-borne
noise transmission.
Loads and stresses on roof structure:
»
Do not install the outdoor unit on a roof structure of
lightweight construction.
»
Note that when outdoor temperatures are very low,
ice can form beneath the outdoor unit.
»
In terms of roof structure loads, allow for an ice load
of 400 kg/m² in addition to the dead weight of the
outdoor unit.
1 Flat roof
2 Refrigerant lines in open air (enclosed in thermal in-
sulation with UV protection)
3 2 concrete slabs attached with exible adhesive (per
leg of the outdoor unit). The outdoor unit is a󰀩xed to
the concrete slabs
4 Anti-vibration mounts
When installing the outdoor unit on a freestanding car port,
a garage roof or a storage space roof, please note the
following:
»
Ensure that the outdoor unit is adequately secured,
with regard to the wind load occurring at the installa-
tion location.
»
Take account of the concentrated load arising from
the dead weight of the outdoor unit (including the
roof xings) and the surface load caused by possible
build-up of ice.
»
Ensure suitable structure-borne vibration separation
between the outdoor unit and the installation points
on the roof.

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Machine-specic engineering and preparation
8.2 Refrigerant lines
When laying the refrigerant lines, observe the following
guidelines:
►No bends with centre line radii smaller than 2.5 x the
diameter of the pipe
►Refrigerant lines must be protected from damage in
normal operation and during maintenance, service
work and repair
►Refrigerant lines must not be routed through rooms
that do not comply with the requirements for the mini-
mum area of clear oor space in the installation room
(see page 20, Minimum area of clear oor space in
the installation room)
8.2.1 Line lengths and height di󰀨erentials
Outdoor unit positioned higher
A + B + C
(sum of line lengths)
D
(max. height differ-
ential)
AIR 85 16 m ≤ 5 m
Outdoor unit positioned lower.
A
(max. height differential)
AIR 85 ≤ 0.5 m
Maximum connection line height
8.2.2 Material requirements
The pipe diameter data for refrigerant lines shown below
applies, provided the following is observed:
►Maximum 8x90° bending radii
►Use suitable ttings for bends
►Bending radii of ≥ 1 m are treated as straight runs
Suction gas line
Copper pipes
Requirement Diameter
AIR 85 R290 (hard, in rods) to EN
12735-1
42x2 (1x)
Fittings
Requirement
AIR 85 Max. permissible operating pressure 45 bar
Max. permissible temperature 120°C
Used with refrigerant R410A
Information
The insulation used for the suction gas line must
comply with the requirements for high temperature
applications.
Liquid line
Copper pipes
Requirement Diameter
AIR 85 R220 (soft, in rings) to EN
12735-1
22x1 (1x)

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Machine-specic engineering and preparation
Fittings
Requirement
AIR 85 Max. permissible operating pressure 45 bar
Max. permissible temperature 65°C
Used with refrigerant R410A
8.3 Indoor unit
»
Do not install the indoor unit in a building of light-
weight construction (oors and walls).
Information
The heat pump installation should be sound insu-
lated with sound insulation underlay and exible
connection hoses.
8.3.1 Minimum clearances
8.3.2 Minimum area of clear oor space in the
installation room
Each refrigerant requires a minimum area of clear oor
space in the installation room.
Information
The minimum area of clear oor space in the in-
stallation room varies depending on the country.
»
Observe all applicable national and regional
regulations and provisions.
Information
If the installation area is too small, the following
measures may help:
- Enlarging the space by creating a network of
rooms
- Mechanical ventilation
WARNING
Refrigerant escaping into spaces that are too small
poses a su󰀨ocation hazard.
»
Do not block door gaps and ventilation open-
ings used to enlarge the space.
8.4 Preparing the electrical connection
WARNING: Electrocution
All electrical connection and installation work must
be carried out according to the applicable national
and regional regulations.
WARNING: Electrocution
Before commencing electrical connection and
installation work, the heat pump system must be
isolated from the power supply.