Ochsner AIR 80 C13A User manual

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Operating and Installation Instructions
AIR 80 C13A (OLWP 65 plus)
AIR 80 C22A
Air/Water Heat Pump
for heating, cooling and hot water
TRANSLATION OF THE ORIGINAL MANUAL

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Contents
1Notes on the documentation..........................4
2Safety instructions........................................4
3Description of the appliance........................... 5
Function ..........................................................5
Heat pump AIR 80 C13A and AIR 80 C22A............5
Construction ....................................................5
3.3.1 Compressor....................................................5
3.3.2 Housing..........................................................5
3.3.3 Evaporator......................................................6
3.3.4 Liquid separator with sump ............................6
3.3.5 Condenser......................................................6
4Installation .................................................6
Delivery ...........................................................6
Transport.........................................................6
Tilting dimension of the inside unit.....................6
Installation of the inside unit .............................6
Installing the free-air system..............................7
4.5.1 Important installation instructions...................8
Heating system connection................................9
4.6.1 Flow rate measurement................................10
4.6.2 Cooling version ............................................10
Nominal flow rates in heating system ...............11
Heat source connection (WQA) ........................11
4.8.1 Wall ducting..................................................11
4.8.2 Installation of non-buried connecting pipework
11
4.8.3 Installation of buried connecting pipework....12
4.8.4 Symmetric connecting pipework AIR 80 C22A
14
4.8.5 Sizing the connection pipework....................15
4.8.6 Refrigerant pipework....................................16
4.8.7 Seal test.......................................................16
4.8.8 Insulation......................................................16
Electrical connection.......................................17
4.9.1 Power supply to the heat pump....................17
4.9.2 Cable cross sections....................................18
4.9.3 Evaporator wiring .........................................18
4.9.4 Sensor wiring ...............................................19
4.9.5 Pumps, drives 230VAC................................20
Smart-Grid .....................................................20
Utility signal contact........................................20
Tariff without interruption...............................20
Switching off via tariff relay: ............................20
Off-peak tariff.................................................20
5Commissioning ..........................................21
Before you switch on ......................................21
Check list for commissioning............................21
Required on-site personnel:.............................21
For the system installer ...................................22
Commissioning OCHSNER ................................22
6System operation.......................................23
Safety functions..............................................23
Running costs.................................................24
6.2.1 Flow temperatures........................................24
6.2.2 Ventilation ....................................................24
6.2.3 Set-back program heating............................24
7Service work .............................................25
Cleaning and care ...........................................25
Customer Service............................................26
Service Contract .............................................26
Trouble shooting.............................................26
7.4.1 Error report table ..........................................27
8Decommissioning and disposal..................... 28
Disposal of transport packaging........................28
Decommissioning............................................28
Disposal of the appliance .................................28
9Technical data........................................... 29
Performance data AIR 80 C13A (OLWP 65 plus)..29
Performance data AIR 80 C22A.........................30
Energy consumption data ................................31
Heat pump dimensions....................................32
Dimensions of evaporator VHS 80.....................33
Dimensions of evaporator VHS-M 80.................34
Foundation for VHS 80 (AIR 80 C13A)................35
Foundation for VHS-M 80 (AIR 80 C22A)............36
Fitting the de-icing sensors to the VHS 80..........38
Performance curves ........................................39
Limits of the heat pump deployment ................40
Flow rates ......................................................40
Pump characteristics Stratos Para.....................41
Setting the flow rate........................................42
Wiring diagram AIR 80 C13A.............................43
Wiring diagram AIR 80 C22A.............................44
10 Electrical circuit diagrams AIR 80 C13A .......... 45
11 Electrical circuit diagrams AIR 80 C22A .......... 51
12 Inside unit - preparation for installation......... 57
Disassembling the top cover.............................57
Disassembling the top cladding ........................58
Disassembling the bottom cladding...................59
Disassembling the wooden palette ...................60
Mounting the adjustable feet ...........................61
13 Declaration of Conformity........................... 62
14 ERP-Data.................................................. 64
15 Directory of Illustrations ............................. 66
16 Directory of Tables .................................... 66

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1Notes on the documentation
Please read your heat pump's operating instruc-
tions carefully from front to back. The infor-
mation in this document will help you to operate
the heat pump correctly. This manual is to be
stored in the vicinity of the heat pump and must
be easily accessible. The precautionary pointers
below will be used in this document.
WARNING
Pointers which, if not heeded, can
mean danger to life and limb, and can
also lead to material damage. These
pointers must be heeded without fail.
ATTENTION
Pointer which, if not heeded, can lead
to an appliance malfunction and to
material damage (to system compo-
nents, building, ...). These pointers
must be heeded without fail.
NOTE
Tips which are intended to aid the job
in hand, or mean additional infor-
mation for the user.
ATTENTION
Pointers for work on electrical equip-
ment. These pointers must be heeded
without fail.
Attention - danger to life and limb!
2Safety instructions
Read this manual carefully before you begin to
commission/adjust the heat pump!
Converting or altering the appliance is
not allowed. Work on the appliance
(repairs, alterations) may only be car-
ried out by the manufacturer or by a
specialist authorised by the manufac-
turer.
All circuit breakers in the heating sys-
tem are to be turned off before any
work is carried out on the terminal
strips or electrical connections (wir-
ing).
The control, auxiliary modules, termi-
nal strips and wiring of the
control can also be supplied with line
voltage by external switching (safety
thermostats, etc.), even if the control
is not connected or is receiving no
power.
The commissioning as well as the ser-
vicing of the appliances may only be
carried out by personnel which are
authorised by OCHSNER.
The installation of the appliances and
their electrical wiring may only be
carried out by a specialist according to
local regulations and codes of practice.
Protective functions for the heat pump
can be activated by the control. How-
ever, as the control is not certified as a
safety appliance, the protection
against failure or damage to the heat
pump must be adapted to the local in-
structions (for instance, by additional
external switching of the safety appli-
ances used).
WARNING
The appliance may not be used as a
step or platform. Do not climb on the
appliance or place any loads on it.

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3Description of the appliance
Function
The heat pump converts low temperature heat
(e.g. heat from the outside air) into heat of higher
temperatures (heating water).
The heat pump extracts from ambient
- ground
- ground water
- air
the stored solar energy and returns this, plus
drive energy (electricity for the compressor) in
the form of heat to the heating and hot water
circuits.
The system consists of separate circuits, which
are coupled by means of a heat exchanger.
- Heat source system →extraction of heat from
the environment
- Heat pump →refrigerant circuit.
- Heat use circuit →emission of heat to the
heating system.
Fig. 1: Schematic diagram of the refrigerant circuit
1) Scroll-compressor
2) Condenser
3) Heating
4) Expansion valve
5) Environmental energy
6) Evaporator
The refrigerant circuit consists of:
- finned heat exchanger as evaporator
- compressor, mounted on a noise and vibra-
tion dampening thick metal plate
- plate heat exchanger as condenser
- dryer, refrigerant sump, expansion valve, safe-
ty equipment
- Chlorine-free, non-inflammable safety refrig-
erant and biodegradable special oil for the
compressor.
Heat pump AIR 80 C13A and AIR 80
C22A
The heat pumps of the AIR 80 C13A (OLWP 65
plus) and AIR 80 C22A are split appliances,
whereby the machine unit is installed indoors and
the corresponding evaporator outdoors in the
free air.
The machine unit is suitable for indoor
installation only and is not suited for
outdoors.
The heat extraction (heat source system) normal-
ly takes place from the ambient air via a finned
tube evaporator. The AIR 80 C13A and AIR 80
C22A heat pumps operate at low temperatures in
bivalent-parallel operation. The heat pump can,
however, be combined at any time with a further
heat generator.
Construction
3.3.1 Compressor
The fully hermetic SCROLL compressors are spe-
cially designed for heat pump use, i.e. for the
highest loading. Various important constructive
measures protect the compressor, both under
normal operative conditions as well as overload-
ing. The compressors used by OCHSNER have the
highest performance and are the most durable.
The SCROLL compressors have only a few moving
parts and have no dynamic suction or pressure
valves. Furthermore, they are distinguished by a
very low vibration and noise level.
3.3.2 Housing
A profile frame, corrosion protected and with
elegant cladding plates. The complete cladding is
fitted with noise-dampening mats.

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3.3.3 Evaporator
Consists of copper tubing in an Aluminium fin
package. This is suitable for outside installation.
The intake air must not be subjected to aggres-
sive material (Ammoniac, Sulphur, Chlorine etc.)!
3.3.4 Liquid separator with sump
The liquid separator protects the compressor
from liquid hammering, especially when the re-
frigerant circuit is reversed. Due to the large-sized
liquid sump, an optimum supercooling and thus
an optimum performance is achieved, even at
differing air temperatures (summer opera-
tion/cooling, winter operation/heating, hot water
and de-icing).
3.3.5 Condenser
The heat exchangers are made of stainless steel.
Their special construction allows high stability.
The plate heat exchanger is insulated all round
against condensate and heat loss. The quality of
the water in the heating system must be ensured
by means of testing to VDI 2035 resp. ÖNORM H
9195-1 both before commissioning as well as
during operation. The results are to be docu-
mented in the system log.
4Installation
Delivery
The heat pump is delivered on a one-way palette
and packed in foil (ARA Licence No. 7910). See
Chapter 12 for the removal of the inside unit
from the one-way palette.
Report any transport damage immedi-
ately on receiving the heat pump!
Transport damage that is reported be-
latedly cannot be recognised as a
claim!
Transport
The heat pump is to be stored and transported
packaged up. Careful transport at an angle up to
45° is permitted over short distances. Ambient
temperatures from –20°C to +45°C are permitted
both for transport and storage. The standard
packaging offers no weather or seawater protec-
tion.
Transport damage can only be recognised if this is
made known to the driver of the delivery vehicle
during, or immediately after unloading.
Tilting dimension of the inside unit
The tilting dimension of the heat pump is 209cm:
Fig. 2: Titling dimension of the heat pump
Installation of the inside unit
The heat pumps AIR 80 C13A and AIR 80 C22A
can be installed in any room, provided they are
dry, not endangered by frost and noise opti-
mised.

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Ensure the maximum room temperature does
not exceed 30°C.
Installation must take place on an even, horizon-
tal surface. The place of installation must con-
form to the static requirements of the heat pump
(pressure stress due to point loading of the feet).
OCHSNER cannot assume any warran-
ty for sinking due to a foundation that
was sized too small!
Fig. 3: Minimum clearance to the sides.
Fig. 4: Minimum clearances to front and rear.
Placement of the unit should be such that servic-
ing and maintenance are possible. The overlap
must be ca. 250 cm.
The heat pump must be acoustically de-coupled
from the floor. Reverberant rooms can lead to
increased noise perception. A possible transfer of
noise to adjacent rooms cannot be ruled out and
should be considered when planning the system.
The higher the heating capacity of the heat
pump, the greater the noise emission from the
heat pump's compressor.
Installing the free-air system
The installation of the split outside unit (evapora-
tor) is only permitted in free air and must be car-
ried out in such a way that the air flow is unhin-
dered on all sides. The following installation in-
structions are valid for the three-fold split evapo-
rator VHS 80 with the AIR 80 C13A and both
double split evaporators VHS-M 80 with AIR 80
C22A.
Fig. 5: Installation variant not permitted
The minimum clearance to walls must be adhered
to (Fig. 6)
-Clearance to wall (long side):
10cm or more than 100cm
-Lateral clearance of the short sides to wall:
100cm
-Clearance between two evaporators:
100cm on all sides
NOTE
The connecting side for the evaporator
pipework must be accessible without
danger throughout the year.

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Fig. 6: Minimum clearances to wall for VHS 80
Fig. 7: Minimum clearances to wall for two VHS-M 80,
installation variant 1
A) Connecting side (Liquid/suction gas pipework, electrical
connection)
B) Expansion valve position
Fig. 8: Minimum clearances to wall for two VHS-M 80,
installation variant 2
A) Connecting side (Liquid/suction gas pipework, electrical
connection)
B) Expansion valve position
The clearance from the lower edge of the evapo-
rator and the roof/ceiling must be greater than
3m.
Fig. 9: Minimum clearance to ceiling (VHS 80, VHS-M 80)
4.5.1 Important installation instructions
The higher the heating capacity of the heat
pump, the greater the noise emission from the
heat pump's compressor and the evaporator.
-Avoid installing on reverberant floors
-Installation between two walls can lead to
increased noise levels
-Avoid installing the evaporator near bed-
rooms
-Plants and vegetation can reduce sound
emissions.
-The sound intensity level in a closed room
depends on room size and acoustics.
-When installing the split evaporator, ensure
that it is accessible all year round (special
provisions must be made for roof installa-
tion).
Fig. 10: Installation with gravel bed and drainage pipe
1) Concrete foundation
2) Non-buried connecting pipework
3) Drainage pipe in gravel bed below frost level
3 m

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A frost-free drain is to be constructed to drain off
any condense water. Normally, a condensate
sump or a gravel bed with drainage pipework is
to be constructed under the evaporator.
CAUTION: Slipping hazard
If drainage for condensation is inad-
quate, ice can build up in winter in the
area around the outdoor unit.
-Ensure drainage for condensa-
tion is sufficient even at low
temperatures.
-Ensure that no ice is formed,
especially around walking sur-
faces and entrances around
the outdoor unit.
Warning danger of slipping!
Observe the regional laws concerning
safety at work are to be observed
when working on flat roofs.
Fig. 11: Installation on a flat roof
1) Vibration dampening plates
2) Non-buried connecting pipework
3) per evaporator, 2 pieces washed concrete slabs, connect-
ed by flexible adhesive, evaporator fixed to slabs
Heating system connection
The installation of the appliances may
only be carried out by a specialist ac-
cording to local regulations and codes
of practice.
All heat pump connections are to be mounted in
a flexible fashion. Avoid vibration transmission
bridges when installing pipework. The pipework
sizing as well as the choice of circulation pump is
dependent on the relevant heating system.
Observe the following sizing fundamentals:
The flow rate in the pipe-network
must not exceed 0.8 m/s.
(noise/resistance).In order to ensure a
comfortable and disturbance-free op-
eration, a temperature difference of
5K between the heating system flow
and return is to be maintained.
Fig. 12: Hydraulic and electrical connections to the heat
pump (schematic)
1) Heat use system: Flow 2" (Heating/cooling)
2) Heat use system: Flow 2" (Heating/cooling)
3) Heat source system: Input
4) Heat source system Output
5) Electrical connections
When sizing the heat system circula-
tion pumps (buffer charge pump, hot
water charge pump), the internal pres-
sure differential in the plate heat ex-
changer is to be taken into account
(see 9 Technical data)!

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For air/water heat pumps, a suitably sized de-
coupling tank (heat pump separation tank resp.
buffer tank) is mandatory in order to provide the
necessary de-icing energy. A bleeder valve (man-
ual bleeding) must be fitted at the highest point
in the pipework system. Non-compliance can lead
to the danger of the heat pump not achieving the
catalogue specified performance and being
switched off by means of a safety switching.
→Error report (see OTE Operating Instructions)
It should be ensured that no foreign bodies (dust,
dirt etc.) can enter into the pipework Before fill-
ing the system with prepared water, the com-
plete system is to be flushed through according
to the Standards (VDI 2035 resp. ÖNORM 5195-
1). A sieve can be installed in the return pipework
to the heat pump in order to collect any dirt.
Make sure that the dirt collector is easy to clean
for maintenance purposes. A clogged sieve af-
fects the heat transfer considerably and can lead
to a switch off via the high-pressure safety
switch!
The heating system pipework is to be sized ac-
cording to the technical data of the heat pump.
Valves and thermometers are to be fitted to the
flow and return pipework so that the water flow
and the running condition of the heat pump can
be monitored at all times. A drain pipe is to be
installed at the lowest point in the pipework so
that the system can be drained.
4.6.1 Flow rate measurement
NOTE
The flow rate meter is part of the heat
pump and must be installed by the sys-
tem installer according to the OCHSNER
installation guidelines. No guarantee
and warranty claims can be granted in
the event of malfunctions for systems
that are operated without a flow meter.
Fig. 13: Installing the flow sensor
1) Flow sensor
2) Heat use system flow
3) Heat use system return
4) Straight pipe (min. 5 x pipe diameter)
5) Flow sensor installing position not permitted
The flow rates are monitored by the flow meter.
A safety switch off of the heat pump takes place
if the flow rate is too low (see 7.4 malfunction
remedy).
4.6.2 Cooling version
All cooling system components (pipework, fit-
tings) must be insulated against condensed water
using suitable insulation material. This is to be
taken into consideration even more for flow
pipework from the heat pump to the buffer tank.
In cooling, as well as in de-icing operation, ensure
that there is a sufficient sizing of the hydraulic
safety equipment, especially that the pressure
maintenance system is matched to the opera-
tional requirements with corresponding primary
pressure.
The primary pressure of the diaphragm pressure
vessel as it is supplied must not be used without
checking, but must be calibrated for the corre-
sponding system. Depending on the system
height, the diaphragm vessel primary pressure
and the filling pressure of the heating system
must be determined and calibrated.

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Nominal flow rates in heating system
The nominal flow rates in the heating system are
to be ensured. Deviating flow rates can lead to a
heat pump safety switch off. OCHSNER accepts
no liability for this!
Heat source connection (WQA)
4.8.1 Wall ducting
The ducting through outside walls is to be con-
structed using lined feed pipes. The ducting
should be laid with a gentle slope (min. 2%)
down slightly toward the outside!
The wall ducting must be sealed by the
system installer with suitable sealing
compound in order to avoid water en-
tering the brickwork / living areas.
NOTE
The wall ducting is not part of
OCHSNER's scope of supply. Responsi-
bility for any damage which may be
caused by incorrect sealing will not be
accepted by OCHSNER.
Only thus can it be guaranteed that any con-
dense/rain water can be correctly led away vie
the house drainage, and that no moisture perme-
ates the wall brickwork. It is also of great im-
portance that the "lined conduit" outside the
building should be bevelled from top to bottom
and surrounded by gravel. This will ensure that
no water enters the building in the event of
heavy rainfall.
4.8.2 Installation of non-buried connecting
pipework
Preparations for the system installer:
-Professionally prepared wall conduits
-Construct evaporator foundation
-Fix evaporator to foundation
-Connect up the evaporator electrically
Work to be carried out by OCHSNER customer
service:
Once the evaporator installation has been com-
pleted, the OCHSNER customer service engineers
will install the connections between the inside
unit and the evaporator.
If the connecting pipework is not buried, the re-
frigerant pipework has to be insulated according-
ly with insulation that is UV-resistant and pro-
tects against moisture. If the pipework is to be
laid horizontally, the refrigerant pipework must
be suitably supported.
Walking or driving on the free-
spanning connection pipework is to be
avoided at all costs!
Fig. 14: Installing a non-buried connecting pipework, using
an AIR 80 C13A with a VHS 80 as an example.
1) Connecting pipework insulated against the conduit
2) Insulated against the wall
3) Evaporator
4) Connecting pipework (insulated with UV protection)
5) Point foundation (6 in all), KG pipe 315
6) Gravel bed
7) Drainage pipe
8) Heat pump

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4.8.3 Installation of buried connecting pipework
When using buried connecting pipe-
work, an installation shaft must be
constructed at the connecting point of
the refrigerant and the evaporator for
the Models AIR 80 C13A and AIR 80
C22A.
The diameter of the shaft must be a
minimum of 1.5m and its height must
be a minimum of 1.2 m (2 rings and a
cone). If the collection shaft that is
sized too small, OCHSNER customer
service will not commission the system
(safety at work)!
All brazing points on the copper con-
nection pipework must be accessible
for servicing all-year-round (F-gas
regulation).
Preparations for the system installer:
-Correct construction of the wall conduit
through the cellar wall for the lined conduit
(min. D=200 mm).
-Dig out a channel between the cellar wall and
the installation shaft (max. 4m clearance due
to 5m copper pipework length)
-Construct installation shaft
-Construct evaporator foundation
-Fix evaporator to foundation
-Lay lined conduit sloping towards the installa-
tion shaft
Fig. 15: Installation shaft
1) Drainage
2) Lined conduit
3) Cover (D=800mm)
4) Connection pipework
5) Gravel
It is essential with the heat pump AIR 80 C22A
that the liquid and suction gas pipework is sym-
metrically distributed to both evaporators (see
Section 4.8.4). An appropriate arrangement of
the evaporator connections to the installation
shaft is therefore essential for ground-based
connection pipework.
Fig. 16:Symmetrical arrangement of buried connection
pipework with the installation shaft with AIR 80 C22A.
A) Connecting side (Liquid/suction gas pipework, electrical
connection)
B) Expansion valve position
Work to be carried out by OCHSNER customer
service:
-Soldering the copper pipework knee
-Solder a vertical copper pipe to the copper
knee
-Complete the connection with the evaporator
-Fit the insulation
Once all the work on the connections has been
completed and the pipework has been seal tested
by means of a pressure test, the channel with the
lined conduit can be filled with suitable bulk ma-
terial.

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Fig. 17: Schematic diagram of buried connection pipework with the installation shaft with AIR 80 C22A.
Top: Cross section; bottom: Evaporator and installation shaft, plan view
1)
Heat pump
6)
Liquid pipework (insulated)
2)
Sealing cap
7)
Suction gas pipework with Venturi distributor (insulated)
3)
Sealing (if any ground water pressure or in flood endan-
gered areas, a proper seal is mandatory!)
8)
Installation shaft
4)
Evaporator
9)
Lined conduit, D=200mm, min. 2% gradient to outside
5)
Connection pipework to shaft
10)
gravel
A)
Connecting side (Liquid/suction gas pipework, electrical
connection)
B)
Expansion valve position

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4.8.4 Symmetric connecting pipework AIR 80 C22A
The liquid pipework to the two VHS-M 80 evaporators is to be distributed symmetrically (Fig. 18)
•1 x liquid pipework upstream of the distribution: Cu, 22x1mm
•2 x liquid pipework downstream of the distribution: Cu, 16x1mm
•Pipework lengths downstream of the distribution (s1=s2): max. 3m
•Difference in pipework lengths between s1 and s2: max. 0,5m
Fig. 18: Distribution of the liquid pipework for two VHS-M 80 evaporators
A) Connecting side (Liquid/suction gas pipework, electrical connection)
B) Expansion valve position
The suction gas pipework is also to be distributed symmetrically (Fig. 19):
•1 x suction gas pipework upstream of the distribution: Cu, 42x2mm
•4 x suction gas pipework downstream of the distribution: Cu, 22x1mm
•Pipework lengths downstream of the distribution (s1=s2=s3=s4): max. 3m
•Difference in pipework lengths between s1, s2, s3 and s4: max. 0,5m
Fig. 19: Distribution of the suction gas pipework with a Venturi distributor for two VHS-M 80 evaporators
A) Connecting side (liquid/suction gas pipework, electrical connection)
B) Expansion valve position

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4.8.5 Sizing the connection pipework
Fig. 20: Pipework lengths and max. height difference between the heat pump and the evaporator: Case 1
Valid for AIR 80 C13A and AIR 80 C22A
Fig. 21: Pipework lengths and max. height difference between the heat pump and the evaporator: Case 2
Valid for AIR 80 C13A and AIR 80 C22A
Sizing the connecting pipework in Case 1 (Fig. 20) and in Case 2 (Fig. 21):
•The sum of the partial lengths (s1+s2+s3+....) must not exceed a total length of 16m!
•Fluid pipework: Cu, 22x1mm:
•Suction gas pipework: Cu, 42x2mm
•Max. number of bends: 8 (to be manufactured on bending equipment, at 42mm is 90°-solder fitting to
be used)
•Bending (22mm raw copper) radii of 1 m are deemed to be straight!

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Fig. 22: Max. connecting pipework head of 2.5 mm
Valid for AIR 80 C13A and AIR 80 C22A
4.8.6 Refrigerant pipework
The refrigerant pipework must always be located
on the side of the heat pump (left or right). A rear
connection should only take place in exceptional
circumstances as the connection work is clearly
made more difficult.
4.8.7 Seal test
The seal test is carried out and logged by the
OCHSNER customer service engineers during
commissioning.
4.8.8 Insulation
All refrigerant pipework is to be protected by the
installer against condense water by means of a
workmanlike insulating material. The heat insula-
tion must be additionally UV protected in outside
areas.
Insulation laid in the ground must be
made of closed-pore material. The in-
sulation properties of the material will
otherwise be affected.

BA_AIR_80_C13A_AIR_80_C22A_OTE3_SW5x_EN_V07.docx Page 17 of 68
Electrical connection
The regulations of the responsible en-
ergy utility and the relevant EN-
standards are to be strictly adhered to.
ATTENTION
Before wiring up the unit make sure
that the heating system carries no line
voltage.
DANGER of electrocution
Install all electrical connections accord-
ing to national and local Standards
Connecting work may only be carried
out by a certified specialist according
to this instruction!
The values indicated for fuse protection are given
solely for reference. The correct sizing of the
safety measures is the sole responsibility of the
electrician connecting the heat pump. The choice
of cable size is to be made by the electrician tak-
ing into account the ratings and cable lengths.
4.9.1 Power supply to the heat pump
The stated voltage must be the same as the
house circuit voltage. Observe the specifications
on the rating label!
The approval of the specific utility must be sought
before connecting the appliance
The circuit breaker for the main power supply
circuit 230V and the main circuit (3 v 400VAC) is
to be a circuit breaker that switches off all poles
in the event of a malfunction. Main and control
supply cables are to be run separately. The con-
trol supply circuit (230VAC) is to be protected by
a C13A circuit breaker and the main circuit by a
C80A circuit breaker. The supply cable must be
protected against overload and short circuiting.
ATTENTION
This appliance contains frequency con-
verters (e.g. EC circulation pumps).
Leakage currents may arise in normal
operation. In the event of faults, these
components may cause DC fault cur-
rents. An incorrectly selected RCD may
trip during normal operation or, in the
event of a fault, may not trip at all or
only trip after a delay.
-Make sure that the power
supply for this appliance is
separate from the domestic
installation.
-Install a type B, AC/DC-
sensitive RCD.
Fig. 23: Electrical connection to the heat pump
Should the minimum clearances of
20cm between sensor wiring and
230V/400V not be able to be adhered
to, sheathed wiring is to be used.
OCHNSER provides no guarantee in cases of sys-
tem damage occurring due to incorrectly sized
safety devices!

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All three-phase drives (compressor,
pumps, fans) must be connected to a
CLOCKWISE field of rotation. A short-
term operation in the wrong field of
rotation will lead to compressor dam-
age. OCHSNER accepts no liability for
this.
The leakage current protective
measures and the earth connection
necessary for the system are to be
inspected by a qualified electrician
before commissioning. The compres-
sor motor is not protected by a circuit
breaker in the main supply circuit.
The switching equipment used to
switch off all poles of the power sup-
plies to the system must conform to
the safety requirements of EN 60204-
1, Section 5 and 13.4.5 as well as in-
ternational IEC 60947 standards.
When servicing the system, all power
supplied to the heat pump are to be
switched off and the safety measures
according to EN 50110-1 adhered to.
Should the safety requirements or
precautions not be adhered to, this
could lead to serious bodily injuries or
death.
4.9.2 Cable cross sections
Conventional wiring is to be used for sensors and
actuators. The following guidelines are to be ob-
served:
Position
Minimum
cross sec-
tion
Supply cable 230VAC:
Connecting cables are always to be sized
according to on-site conditions
1.5 mm²
Control cable 230VAC:
(pumps, valve motors)
1.0 mm²
Sensor cables:
(outside sensors, etc.) must always be run
separately (min. 20 cm) from 230V/400V
cables. If separation is not possible,
sheathed cables are to be used. Sheathing
is to be connected to PE on the heat pump.
The maximum cable length must not ex-
ceed 50 m.
1.0 mm²
Bus cables:
Must always be run as sheathed cabling
(e.g.: eBus from OTE control to room re-
mote controls, auxiliary modules or bus
connections for cascading, etc.) The
sheathing is to be earthed.
OCHSNER recommends the following con-
ventional cables: Y(ST)Y) 2x2x0.8
Attention: Always used a twisted core pair!
0.8 mm²
Pulse cables for the stepping motor of an
electronic expansion valve are to be
sheathed.
OCHSNER recommends
ÖLFLEX® CLASSIC 100 CY
1.0 mm²
Table 1: Wiring cross sections
4.9.3 Evaporator wiring
The drives and the sensors on the evaporator are
supplied from the inside unit. For this, the follow-
ing cables are necessary from the inside unit to
the evaporator.
Motors/Sensors
Cable
230V power supply to fan
3 x 1.5 mm²
Fan alarm
2 x 1.5 mm²
De-icing sensors TQA, TQE
4 x 1 mm²
Electronic expansion valve
4 x 1 mm²
S2 sensor for electronic expansion valve
2 x 1 mm²
Table 2: List of cables for evaporator (values in mm²)

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All cables/wiring must be suitable for laying in
free air and also UV protected. Should operation
in star-delta switching be necessary, the operat-
ing currents and especially the settings on the
motor protection relay are to be taking into con-
sideration.
An E-rod as function protection is to be supplied
via a separate all-pole switching circuit breaker
(at best with an additional own leakage current
switch).
If an AIR 80 heat pump is installed, the fans of the
VHS 80 evaporator must be wired on site (see
Chapter 9.15)
4.9.4 Sensor wiring
NOTE
Should the minimum clearances be-
tween sensor wiring and 230V/400V
given in Table 1 not be able to be ad-
hered to, sheathed wiring is to be
used.
OCHSNER accepts no liability for de-
fects on controls which are the result
of incorrect laying/wiring (induc-
tion/electric emission, etc.).
Do not place line voltage on the sensor
terminals! The control will otherwise
be destroyed.
De-icing sensor (TQA,TQE) with AIR 80 C13A:
Two de-icing sensors are to be installed in the fin
package of the evaporator (see Chapter 9.9). A 4-
pole cable is to be run from the inside unit to the
evaporator. The sensors are then fixed together
with the 4-pole cable in a moisture-protected
terminal box (not supplied) (see Chapter 9.15).
De-icing sensor (TQA,TQE) with AIR 80 C22A:
With the AIR 80 C22A, the de-icing sensors are
factory-fitted in both evaporators (VHS-M 80). A
TQE-de-icing sensor and a TQA-de-icing sensor
are needed for the control (see Chapter 11).
External temperature sensor (TA):
The outside sensor (TA) is to be mounted at ca.
2.5 m height on the outside wall of the building
(north-west side). It is to be ensured that the
outside sensor is not directly affected by sun's
radiation or by wind, as this will adversely affect
the control behaviour.
NOTE
Do not fix the sensor housing to the
evaporator housing or in the exhaust
air flow.
Buffer sensors (TPO, TPM)
A minimum of 2 immersion sensors are to be
installed in the sleeves in the buffer tank. 2 buffer
sensors are to be used:
-Top buffer sensor (TPO)
-Middle buffer sensor (TPM)
The heat pump is switched on with TPO and
switched off with TPM.
Hot water sensor TB
The hot water sensor (TB) is packed in the heat
pump on delivery. The sensor should be placed in
the bottom third of the tank, maximum in the
middle. OCHSNER hot water tanks are fitted with
corresponding sleeves for the installation.
NOTE
In order to measure the temperature
correctly, the hot water sensor must
reach past the insulation into the inte-
rior of the tank.
Mixer sensor TMK
If a mixing circuit is installed in addition to the
direct heating circuit, a mixing valve sensor must
also be installed. The mixing valve sensor (TMK) is
supplied as a contact sensor with band clamp and
conductive paste. The mixer sensor is to be
mounted directly upstream of the mixing circuit
pump onto (metallic) pipework material with
good thermal conductivity.

BA_AIR_80_C13A_AIR_80_C22A_OTE3_SW5x_EN_V07.docx Page 20 of 68
4.9.5 Pumps, drives 230VAC
Pumps, (heating circuit pumps, hot water charge
pumps) as well as drives (mixing valves, etc.) are
connected directly to the control.
A test-run may only be undertaken on
a fully-prepared system that is ready
for commissioning! (Hydraulics con-
nected, clockwise rotary field ensured)
Smart-Grid
Special instructions for the Smart-Grid function
are available on request.
Utility signal contact
In the case of tariff switching (interrupted power
supply) the heat pump will be temporarily
switched off by the utility.
ATTENTION!
230VAC control voltage is present on
the utility contact.
Fig. 24: Utility signal contact
Remove the bridge on terminal X3 and connect
the cable to the utility contact. If the EVU contact
is interrupted, the compressor and also, if appli-
cable; the auxiliary heater switch off.
Tariff without interruption
In the case of tariff switching without interrupted
power supply the heat pump will be temporarily
switched off by the utility. The control input EVU
on the inside unit is to be used for this.
(Terminal block X3) To activate the function, re-
move the bridge and connect the cable.
Switching off via tariff relay:
For switching by means of a tariff relay (sealed by
the Utility on site) the power supply to the heat
pump compressor is switched off. In this case, the
EVU input is to be switched without fail via an
auxiliary contact on the tariff relay (NC contact).
Off-peak tariff
If the tariff switching takes place in the meter
(Off-peak Tariff), the EVU contact must not be
activated.