Ochsner OLWI 9 Operating instructions

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Operating Instructions/Installation
Instructions
OLWI
Air/Water Heat pump
Heating/hot water

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Contents
1Notes on the documentation................. 4
1.1 Symbols........................................................4
2Safety instructions................................. 4
2.1 CE Labelling..................................................4
3Description of the appliance ................. 5
3.1 Heat pump OLWI ..........................................5
3.2 Function........................................................5
3.3 Scope of delivery...........................................5
4Preparation ............................................ 6
4.1 Noise emission..............................................6
4.2 Air ducting.....................................................6
4.3 Minimum clearances.....................................7
4.4 Foundation....................................................7
4.5 Foundation....................................................7
4.6 Buffer tank.....................................................7
5Installation ............................................ 8
5.1 Transport.......................................................8
5.2 Placing and connecting the appliance...........8
6Heating water connection ...................10
6.1 Oxygen diffusion .........................................10
6.2 Second heat generator................................10
6.3 Filling the heating system............................10
6.3.1 Properties of the water................................10
6.3.2 Filling10
6.4 Bleeding the heating system.......................11
6.5 Condensate drain........................................11
6.5.1 Check the condensate drain .......................12
6.6 Flow rate measurement ..............................12
7Electrical connection ........................... 13
7.1 Cable cross sections...................................13
7.2Power supply wiring....................................13
7.3 Switching off via tariff relay: ........................14
7.4 Utility control contact...................................14
7.5 Control wiring..............................................14
7.6 eBus wiring .................................................14
7.7 Sensor wiring ..............................................14
7.8 Pumps, drives 230 VAC..............................15
7.9 Pumps, drives 400 VAC..............................15
8Assembling the cladding .....................16
8.1 Sealing the appliance..................................16
8.2 Assembling the insulation ...........................16
8.2.1 Insulation mats............................................16
8.2.2 Insulation.....................................................17
8.3 Mounting the cladding.................................17
8.4 Installing the air hoses ................................17
8.4.1 General.......................................................17
8.4.2 Installing the air hoses ................................17
8.4.3 Insulating the wall........................................17
9Commissioning .................................... 18
9.1 Required on-site personnel.........................18
9.2 Non-self-resetting safety thermostat ...........18
9.3 Appliance function.......................................18
10 Operation ............................................. 19
10.1 Safety functions ..........................................19
10.2 Running costs .............................................19
10.2.1 Flow temperatures......................................19
10.2.2 Ventilation...................................................19
11 Maintenance........................................ 20
11.1 Service work...............................................20
11.2 Cleaning......................................................20
11.3 Customer Service .......................................20
12 Decommissioning and disposal........... 21
12.1 Disposal of transport packaging..................21
12.2 Decommissioning .......................................21
12.3 Disposal of the appliance............................21
13 Trouble shooting ................................. 22
13.1 Error Codes OTE3 for Airstation.................23
14 Technical data ..................................... 24
14.1 Dimensions and connections......................24
14.2 Hydraulic diagram.......................................25
14.3 Electric circuit diagrams OTE......................26
14.4 Wiring overview ..........................................29
14.5 Electric circuit diagrams IWS circuit board..30
14.6 Performance diagram OLWI 9...................32
14.7 Performance diagram OLWI 13 .................32
14.8 Performance diagram OLWI 18.................33
14.9 Performance tables.....................................34
14.10 Voltage quality in the stand-alone operation36
15 Declaration of Conformity................... 37
16 ERP-Data ............................................. 39
17 Warranty.............................................. 42
18 ANNEX ................................................. 44
18.1 Setting the flow rate....................................44
18.2 Flow rates OLWI (A) ...................................45
18.3 Pump characteristics Yonos Para/ Stratos
Para 45
19 Directory of Illustrations .................... 46
20 Directory of Tables .............................. 46

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1 Notes on the documentation
The following pointers are a guideline for the
whole documentation.
This manual is to be stored in the vicinity of the
heat pump and must be easily accessible.
1.1 Symbols
The precautionary pointers below will be
used in this document.
WARNING
Pointer 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 dam-
age (to system components, building, ...).
These pointers must be heeded without fail.
2 Safety instructions
Read this manual carefully before you begin to com-
mission/adjust the heat pump!
Converting or altering the appliance is
not allowed. Work on the appliance (re-
pairs, alterations) may only be carried
out by the manufacturer or by a special-
ist authorised by the manufacturer.
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 (wiring). The heating sys-
tem consists of the control, the auxilia-
ry modules and the components that
are connected to the control (heat gen-
erator, pumps, safety thermostats, etc.)
Contact with the terminal strips, wires
connected to them, or non-connected
wires by persons or by means of elec-
trically conductive
materials is prohibited as the terminals
strips could be live (danger of touching
power supply).
The control, auxiliary modules, terminal
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 car-
ried out by personnel which are authorised
by OCHSNER.
The installation of the appliances and
their electrical wiring may only be car-
ried out by a specialist according to lo-
cal regulations and codes of practice.
Protective functions for the heat pump can
be activated by the control. However, as
the control is not certified as a safety ap-
pliance, the protection against failure or
damage to the heat pump must be
adapted to the local instructions (for in-
stance, by additional external switching of
the safety appliances used.
In the event of Upgrades/Updates to the
control software, all parametered
heat pump functions are to be controlled
once again.
2.1 CE Labelling
The product you have purchased conforms to the
technical regulations valid at the time of manufacture,
and is CE-conform.

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3 Description of the appliance
3.1 Heat pump OLWI
The appliance is an air/water heat pump which oper-
ates as a heat pump for heating purposes. The appli-
ance extracts heat at a low temperature from the out-
side air and emits it at a higher temperature to the
water in the heating system.
The water for heating can be heated to a flow tempera-
ture of up to 60 °C.
The appliance has an electrical emergency/auxiliary
heater (DAE) with 8.8 kW rating. In the monovalent
mode, the electrical emergency/auxiliary heater is
activated as soon as the temperature falls below the
bivalent point, so that the heating operation and hot
water heating is guaranteed. In the mono-energetic
operation, the electrical emergency/auxiliary heater is
activated as an auxiliary heater.
Further properties
- Suitable for under-floor and radiator heating
- Low-temperature heating systems are preferred.
- Heat can be extracted down to -20°C outside air
temperature
- The external cladding is of corrosion-protected,
galvanised steel plate with additional stove enam-
elling.
- All components and safety equipment necessary
for operation are built in to the appliance.
- Contains non-flammable safety refrigerant
If the heat pump is to be installed in the
proximity of the sea, ensure that a distance
>2km is maintained between the sea and
the place of installation!
3.2 Function
The heat from the outside air is extracted by means of
an air heat exchanger (evaporator). The refrigerant
vaporises and is then compressed by means of the
compressor. Electrical energy is necessary for this.
The refrigerant is now at a higher temperature level
and transfers the heat from the air via a further heat
exchanger (condenser) to the heating system. The
refrigerant expands and the process begins again.
At air temperatures below ca. +7 °C, the humidity in
the air forms icing on the evaporator fins. This icing is
automatically thawed. The water formed by de-icing is
collected in a thawing sump and drained away by
means of a hose.
The fan switches off during the de-icing phase and the
heat pump circuit is reversed. The heat required for de-
icing is extracted from
the buffer storage tank or heating circuit. At the end of
the de-icing phase the heat pump switches automati-
cally back to the heating circuit
3.3 Scope of delivery
The appliance cladding is delivered in a separate
package.
•Basic appliance
•Rating label.
•Functional module with diverter valve and
heat generator pump
•Front panel
•Rear panel
•Side panels left/right
•Pipe bend heating circuit flow
•Pipe bend heating circuit return
Necessary accessories
•Hydraulic connection group, consisting of:
oImmersion sleeve
o 
Nut
oT---
•Sensor set OTE Thermostat
•Cable temperature sensor
•Flow rate sensor DN 20 kvs 10
•Air hoses
•Wall conduit

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4 Preparation
4.1 Noise emission
The appliance is louder on its air-inlet and air-outlet
sides than on both closed sides. Take the following
pointers into consideration when selecting the place of
installation:
Installation on beamed roofs is not permitted.
Do not place the appliance directly under or beside
living or bedrooms.
Make sure that the air inlet and outlet openings in
the outside walls are not pointed at living room or
bedroom adjacent windows.
We recommend placing the heat pump on suitable
rubber matting in the event of reverberating bases
such as tiling.
A more suitable noise reduction can be achieved
with a concrete foundation plate with rubber mat-
ting.
Pipework conduits through walls and ceilings must
be noise insulated.
Our heat pumps are distinguished by their especial-
ly quiet operation. Incorrect integration by the instal-
lation can, however, lead to undesired increase in
the sound level under unfavourable circumstances.
NOTE:
You can find information on the sound
power level in the "Technical Data / Data
Table" section.
4.2 Air ducting
Short circuiting between air inlet and outlet must be
avoided in all events.
It is practical to construct the ducting across a cor-
ner.
If necessary, a separating wall or suitable plants
should be placed between air inlet and outlet.
The weather and/or bird protection grilles should be
easily removed for cleaning.
The hose length on the suction and exhaust sides
must not exceed 8m. Do not make more than four
90° bends. The bending radius must be at least
600mm, based on the hose middle.
Due to its flexibility, the hose tends to sag and must
therefore be fixed at ca. 1m intervals.
The ducting of the air inlet and air outlet to and from
the appliance takes place by means of special air
hoses. These are highly flexible, heat insulated and
are self-extinguishing.
Fig.1: Cross-corner air ducting without a shaft
Fig.2: Cross-corner air ducting with a shaft
Fig.3: Air ducting on an external wall

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4.3 Minimum clearances
Dimensions in mm
Fig.4: Minimum clearances inside installation
Adhere to the minimum clearances in order to en-
sure a trouble-free operation and to allow service
work to be carried out.
Appliance and environmental damage
Make sure that the outside air can enter
and exit the appliance freely without hin-
drance
Should the air inlet and outlet be hindered, a thermal
short circuit could occur.
Appliance and environmental damage
The minimum air flow rate of the appliance
must be maintained at all times. Should the
air flow fall below the minimum, a trouble-
free operation cannot be guaranteed.
Ensure that the minimum air flow is maintained.
See the information in the "Technical Data / Data
Table" section.
4.4 Foundation
General
Make sure that the appliance is accessible from all
sides.
Make sure that the foundation is horizontal, level,
firm and permanent.
Ensure that the appliance frame fits uniformly on the
foundation Uneven ground can influence the noise
level of the heat pump.
4.5 Foundation
1 Concrete base
2 Footfall sound insulation
3 Floating floor screed
4 Floor coating
5 All-round cut-out
Fig.5: Base for inside installation
De-couple the installation area
Observe the following pointer:
- Construct the pipework fixing and the wall
conduit in a sound-insulated fashion.
NOTE:
Dimension and positioning specifications for the air
inlet and outlet openings as well as the water and
electrical feed through can be found in the Section
"Technical Data / Dimensions and Connections".
4.6 Buffer tank
The use of a buffer tank is necessary in order to guar-
antee a trouble-free heat pump operation.
The buffer tank serves not only as a hydraulic decou-
pling of the water flow in the heat pump and heating
circuits, but also as a source of energy for defrosting.

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5 Installation
5.1 Transport
Be aware of the centre of gravity of the appliance
during transport. The centre of gravity is to be found
in the region of the condenser.
Lifting straps for transporting the basic appliance
can be hooked at any point way to the bottom frame
of the heat pump.
Protect the appliance during transport from heavy
bumps. If you have to tilt the appliance during
transport, this may only be done for a short time on
the long side. The longer the appliance is tilted, the
more the refrigerant oil is distributed in the system.
Wait for ca. 30 minutes before you operate the
appliance after it has been tilted.
The appliance must not be placed
on its side!
5.2 Placing and connecting the appli-
ance
NOTE:
- Two screws are provided in the top of the
heat pump frame. These are for fixing the
cowling to the frame.
- Two screws are provided in the bottom of the
heat pump frame, one for each side panel.
Unscrew the 6 fixing screws in the frame and keep
them for later use.
Place the appliance on the prepared foundation.
Pay attention to the direction of the air outlet.
By fitting the pressure hoses supplied between the
functional unit and the heat pump, no further pres-
sure hoses must be fitted as vibration dampeners.
Air hoses are fitted to the functional module. These
are for connecting the air inlet and outlet openings
in the wall.
Wall conduits AWG 560H or AWG 560L are to be
used for the wall feed-through.
Installing the functional module:
Fig.6: Installing the functional module:
Place the functional module on to the heat
pump and fix it with two screws.
Stick the rating label supplied at the top front
of the right-hand side panel of the functional module so
that it is clearly visible.
Opening the functional module:
Fig.7: Opening the functional module:
Remove the safety screw.
Pull the level forward and the left hand flap opens.
Open the right hand flap by pulling firmly.

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Hydraulic connection:
Connect the functional module to the heat
pump with the pressure hoses supplied.
1 Pressure hose flow
2 Pressure hose return
Fig.8: Hydraulic connection functional module:
Check the plug connections on the safety
group for firmness and seal.

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6 Heating water connection
Appliance and environmental damage
The 3 electrical circuits for the appliance, the control
wiring and the electric emergency/auxiliary heater must
be protected separately.
Flush out the system pipework thoroughly before
connecting up the heat pump. Foreign bodies (e.g.
rust, sand or sealant material) influence the opera-
tional safety of the heat pump.
Connect the heat pump to the heating system.
Make sure all connections are sealed.
Connect the flexible pressure hoses to their con-
necting sleeves.
The pressure hoses must be at least 1 metre in length.
The low-vibration design of the heat pump and the
flexible hoses, which act as vibration dampeners, pre-
vent the transfer of vibration from the heat pump to the
pipework to a large extent.
6.1 Oxygen diffusion
Appliance and environmental damage
Avoid open heating systems or steel pipe installations
in connection with diffusion-sealed plastic-pipe under-
floor heating systems.
Diffusion-sealed plastic-pipe underfloor heating sys-
tems or open heating systems in conjunction with steel
pipework can lead to oxygen diffusion corrosion of the
steel pipework.
The products of such corrosion, such as rust silting,
can be deposited on the heat pump condenser and
lead to loss of performance or switching off due to the
restriction in the pipe cross section.
6.2 Second heat generator
In bivalent systems, the heat pump must always be
installed in the return from the external second heat
generator, for instance an oil furnace.
6.3 Filling the heating system
6.3.1 Properties of the water
In order to prevent damage due to scaling, the hard-
ness of the water must be tested before filling the
heating system.
The total hardness of the water must be < 1 °dH (0.18
mmol/l alkaline earths).
The water must be softened if this value is exceeded.
Filling with prepared water
to VDI 2035 / Ö Standard5195
Appliance and environmental damage
Desalinated water or rainwater must not be used as
this leads to increased corrosion. Suitable appliances
for softening as well as for filling and flushing the heat-
ing system can be obtained in specialist shops.
6.3.2 Filling
1 Emptying
Fig.9: Filling the heating system
Filling the heating system via the drain valve.
After filling the heating system, check the
connections for seal (visual inspection and feel).

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6.4 Bleeding the heating system
1 Automatic air-vent
Fig.10: Bleeding the heating system
Bleed the pipework system carefully
Operate the automatic air vent on the appliance
6.5 Condensate drain
A condensate drain hose is attached to the de-icing
sump The condensate drain hose is in the compressor
space on delivery.
Make sure that the condensate hose is not bent.
Install the hose with a constant slope downwards.
If the slope is not sufficient, a suitable condensate
pump must be installed Take the constructional fac-
tors into consideration.
When using a condensate pump, make sure that its
rating is at least 6l/min.
Condensate drain:
1 Drain with odour trap
2 Drain hose with continuous gradient
3 Condensate drain connection
Fig.11: Condensate drain
Condensate drain with a condensate pump
1 Screed and floor covering
2 Footfall sound insulation
3 Condensate drain pipe
4 Plinth
Fig.12: Condensate drain with a condensate pump
The condensate drain hose can be led out of the appli-
ance to the left or the right through the "Durchführung
Kondensatablauf" (condensate drain feed through)
Dimensions in mm
1 Breakout plate for condensate drain
Fig.13: Breakout plate for condensate drain

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Break out the breakout plate from the left hand side
panel using pliers.
Thread the condensate drain hose to the left or right
from the appliance.
Drain the condensate into a drain
If drainage into the ground is provided, lead the con-
densate hose through the breakout plate downwards
from the appliance.
1 
(supply pipework feed through)
Fig.14: Breakout plate for supply pipework
Lead the condensate drain hose at an
oblique angle through the hole in the "Durchführung
Versorgungs
Fix the condensate drain hose in such a way
that it cannot slip.
Drain the condensate into a drain
6.5.1 Check the condensate drain
After laying the condensate hose, make sure that the
condensate is draining freely. Proceed as follows:
Pour water onto the evaporator so that it flows into
the de-icing sump. Ensure the maximum conden-
sate flow of 6l/min.
Check that the water drains away via the conden-
sate drain hose.
6.6 Flow rate measurement
The heat use system flow rate sensor is part of the
heat pump and must be
installed by the system installer according to the
OCHSNER installation instructions.
Please observe the instructions for the adjustment of
the flow rate (see Annex 18.1 - adjustment
of the flow rate).
If the flow rate meter is either not installed,
or incorrectly installed, OCHSNER will not
undertake the commissioning of the sys-
tem.
OCHSNER accepts no liability for possible
damage which may occur if the flow rate
meter is either not installed, incorrectly in-
stalled, sized or wired up.
Fig.15: Flow meter installation in heating system

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7 Electrical connection
DANGER of electrocution
Install all electrical connections according
to national and local Standards
The regulations of the responsible energy
utility and the relevant EN-standards are to
be strictly adhered to.
Connecting work may only be carried
out by a certified specialist according
to this instruction!
The heat pump connection must have
been approved by the competent utility
before it is carried out.
The stated voltage must be the same as the house
circuit voltage. Observe the rating label!
The circuit breaker for the main power supply circuit is
to be a 4-pole fuse that switches off all poles in the
event of a malfunction (for currents, see technical data
Pt. 14/). The supply cable must be protected against
overload and short circuiting. The control cable is also
to be protected by means of an all pole circuit breaker
C16A.
The values for the circuit breaker fuses in the Annex
are guideline values only! The correct sizing of the
safety measures is the sole responsibility of the electri-
cian connecting the heat pump.
OCHNSER provides no guarantee in cases of system
damage occurring due to incorrectly sized safety de-
vices!
Fig.16: Power supply to the heat pump
All three-phase drives (compressor,
pumps, fans) MUST be connected to a
CLOCKWISE field of rotation.
7.1 Cable cross sections
Position
min. cross-
section
Connection cable 230V~:
(pumps, valve motors)
Connecting cables are always to
be sized according to on-site
conditions
1.5 mm².
Sensor cables:
(outside sensors, etc.) must al-
ways be run separately (min. 20
cm) from 230V/400V cables.
The maximum cable length must
not exceed 50 m.
1.0 mm².
Bus cables
(e.g. room remote control) bus
cables must always be laid as
sheathed cables. The sheathing is
to be earthed on one end -- > to
the heat pump on PE.
OCHSNER recommends the
following conventional cables:
Y(ST)Y) 2x2x0.8
0.8 mm².
Signal cables:
(5x 1.0mm², 2x 1.0mm²)
The signal cables between the
switching box Airstation and the
OTE control can be run according
to the hydraulic plan, without
sheathing.
1.0 mm².
Table 1: Wiring cross sections
Should the minimum clearances between
sensor wiring and 230V/400V (100mm)
not be able to be adhered to, sheathed
wiring is to be used.
This is to be especially considered for the outside
sensor wiring. OCHSNER accepts no warranty claims
for damage caused by insufficient protection against
electro-emission
7.2 Power supply wiring
The voltage supplies 400V~ and 230V~ are to be run
separately according to the circuit diagram. See also
Fig. 15
•400V~ for the compressor
•230V~ control voltage
•400V~ DAE
•400V~ optional for auxiliary heater for Le-
gionella treatment (outside unit).

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The power supply 230V~ to the OTE control is on the
terminal strip X1 in the Airstation distribution box (L N
PE). This ensures that the OTE and the control in the
Airstation distribution box have the same phase and
neutral. This cable, as well as the signal cable between
OTE and the Airstation distribution box is already fitted
in the functional module and only has to be connected
to the Airstation distribution box with the flat connect-
ors (L, N) and to the earthing block (PE).
1 OTE
2 Airstation distribution box
Fig.17: OLWI distribution box
7.3 Switching off via tariff relay:
For switching by means of a tariff relay (sealed by the
Utility on site) the 3-phase power supply to the heat
pump is switched off. The heat pump signal contact
must be executed via the auxiliary contact on the tariff
relay
7.4 Utility control contact
In the case of tariff switching (interrupted power sup-
ply) the heat pump will be temporarily switched off by
the utility. For this, the control input Utility (PIN 21) is to
be connected to the control in the heat pump.
The appliance is delivered with PIN21 connected to
PIN 12 on the OTE. When using the Utility control
contact, this cable is disconnected from both PINs and
the Utility control contact connected to PIN 21.
7.5 Control wiring
Digital signals will be transmitted between the control
(OTE) and the Airstation A 5-pole control cable (W5 =
5x 1.0mm²) is used for this. This is already fitted in the
functional module and only has to be connected to the
Airstation distribution box.
1. Wire OTE Pin.11 --> DHC1 and DHC2
2. Wire OTE Pin.20 --> De-icing
3. Wire OTE Pin.4 --> RESET
4. Wire OTE Pin.24 --> HP-ON
5. Wire OTE Pin.19 --> working (Relay K1/A1)
7.6 eBus wiring
An eBus connection is required
between the OTE control and the auxiliary OTE mod-
ule or to the room remote controls and the room termi-
nal with Touch Display.
The communication between the eBus users is by
means of 4 x 1.0mm² wire.
For instance: EIB 4x0.8mm², whereby 2 wires can be
used together, thus providing a cross-section of >=
1.0mm². Ochsner recommends using sheathed wiring.
7.7 Sensor wiring
Do not place line voltage on the sensor
terminals! The control will otherwise be
destroyed.
The Type NTC5K temperature sensors of the OTE
control are supplied with 4.0m cables. Should this
4.0m not suffice, the cables can be extended to the
length required. Please use 2x 1.0mm² flexible cable.
When installing the sensor cable, ensure that the ca-
bles do not run parallel to alternate current >230VAC
cables.
Buffer sensors (TPO, TPM)
A minimum of 2 immersion sensors are to be installed
in the sleeves in the buffer tank. When selecting the
length of the immersion sleeves, take the thickness of
the insulation into consideration as well. 2 buffer sen-
sors are to be used:
Top buffer sensor (TPO)
Middle buffer sensor (TPM)
Fig.18: Heating buffer

BA_OLW I OTE3_SW5x_EN_20160815_V2 15 / 48
Outside sensor TA
The outside sensor (TA) of the control 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. Do not place the sensor in the direct
vicinity of the evaporator either. Possible danger of
adverse influence on the control.
Sensors TQE and TQA
The flow and return sensors for the heating system
(WNA) are to be installed close to the switching box
inside unit. Sensor length 1.5m
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 is supplied as a
contact sensor with band clamp and conductive paste.
The mixing valve sensor is to be mounted directly after
the mixer pump. If multi-layer or plastic pipework is
being used, a suitable metal bridge must be provided.
Hot water sensor TB
The hot water sensor 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.
The current electromagnetic compatibility guidelines
are to be adhered to during laying.
The sensors are to be checked after wiring up.
- plausible values
- correct position
- sensors mixed up?
7.8 Pumps, drives 230 VAC
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!
The hydraulics must be filled!
Danger of destroying the circulation pump!
A relay test can be carried out on the OTE control in
order to test the appropriate outputs (actuators).
The diverter modules from ESBE, which are delivered
by Ochsner, are not mixer motors, even when they
look similar.
7.9 Pumps, drives 400 VAC
3-phase pumps (heat source pump, charge pumps)
with higher ratings will not be directly connected to the
control. Power relays are provided in the distribution
box for this. See electrical circuit diagram Section 14.3
A separate circuit breaker is to be provided in the dis-
tribution box for the optional electrical auxiliary heater
in the hot water tank (Legionella protection). This func-
tion is optional and thus not in the heat pump's scope
of delivery.
A test-run may only be undertaken on a fully-prepared
system that is ready for commissioning!

BA_OLW I OTE3_SW5x_EN_20160815_V2 16 / 48
8 Assembling the cladding
8.1 Sealing the appliance
Before you assemble the cladding, you must seal the
appliance by adhering tape in order to avoid conden-
sate in the appliance during all operational conditions.
The tape is in the cladding.
Fig.19: Seal the appliance inside (1)
Tape over the hole in the bottom of the frame on the
left hand side with the fabric tape. The tape is in the
accessory "heat insulated air hose".
Fig.20: Seal the appliance inside (2)
Hang the foil with the pre-cut
holes on the hooks on the appliance.
Fig.21: Seal the appliance inside (3)
Remove the support layer of the tapes on the frame
and on the foil.
Fix the foil by applying it to the basic appliance.

with fabric tape.
8.2 Assembling the insulation
8.2.1 Insulation mats
Fig.22: Insulation mats
         
the function module with the insulation mat supplied
after connecting up the hydraulics and electrics.

BA_OLW I OTE3_SW5x_EN_20160815_V2 17 / 48
8.2.2 Insulation
Fig.23: Insulation
Fix the insulation over the pump head as shown in
Fig. 22
8.3 Mounting the cladding
1 Side panel
2 Rear panel
3 Front panel
4 Rating label.
Fig.24: Mounting the internal cladding.
Place the top plate on to the heat pump and fix it
with two screws.
Hang the side panel, the front and rear panels into
the hooks on the basic appliance. Fix the cladding
panels each with one screw.
Stick the rating label supplied to an easily visible
point on one of the panels.
8.4 Installing the air hoses
NOTE:
The ducting of the air inlet and air outlet to and from
the appliance takes place by means of air hoses.
These are highly flexible, heat insulated and are self-
extinguishing.
8.4.1 General
The air hose can be extended by twisting the spirals.
The overlap must be ca. 30 cm. The total hose length
must not exceed 8 m on the air inlet and air outlet
sides.
Do not make more than four 90°- bends. The bend-
ing radius must be at least 600 mm, based on the
hose middle.
Use a sharp knife to cut the hose. The wire spirals
can be cut with wire cutters.
Fix the air hose at ca. 1 m intervals in order to pre-
vent the hose from sagging.
Offer up the ends of the air hoses to the oval form of
the connecting sleeves of the cladding and the hose
connecting plates or wall conduits.
8.4.2 Installing the air hoses
Fix the air hoses to the functional module by means
of the wing nuts provided.
Mark up the fixing holes on the outside wall of the
building using the drill template provided.
Use suitable wall plugs and screws to fix the air
hoses according to the wall structure.
8.4.3 Insulating the wall
Make sure that there are no thermal bridges between
the wall and the air connecting plates or wall conduits.
Thermal bridges can lead to condensation in the wall.
If required, install a suitable heat insulation between
the wall and the air connecting plates or wall con-
duits.
Observe the installation instructions for the wall
conduits.
2
2
3

BA_OLW I OTE3_SW5x_EN_20160815_V2 18 / 48
9 Commissioning
Commissioning must be carried out by Ochsner Cus-
tomer Service or a service partner authorised by
Ochsner. The Ochsner commissioning guidelines must
be adhered to. Operating the system without a correct
commissioning will lead to a forfeiture of the guarantee
and warranty rights.
9.1 Required on-site personnel
Electrician, installer and future system supervisor
MUST be present for the system orientation during
commissioning.
INSTRUCTIONS for the system installer.
•The OCHSNER Customer Service engineer /
Customer Service partner will execute the user-
specific settings according to the specifications
in the system data sheet.
•Should the system installer not be present during
commissioning, or if there is no fully completed
system data sheet present, the system will be
commissioned using the control's factory settings.
•OCHSNER accepts no liability for possible mal-
functioning (heating curve too low, bivalent point
too high, etc.). Any claims resulting from this will
be invoiced to the system installer.
•In order to run the system economically,
it is absolutely necessary that the system be bal-
anced hydraulically and that the control settings
are coordinated to the system requirements.
•Other necessary work performed, such as bleed-
ing the system, electrical wiring, additional instruc-
tion etc., that do not fall within the realm of the

ly
9.2 Non-self-resetting safety thermostat
At outside temperatures below - 15 °C, the non-self-
resetting safety thermostat can trigger the electric
emergency/auxiliary heater. Check whether the safety
thermostat has been activated.
Reset the safety thermostat by pressing the reset
button.
1 safety thermostat reset button
2 electric emergency/auxiliary heater
Fig.25: Non-self-resetting safety thermostat
9.3 Appliance function
Electric emergency/auxiliary heater in the heat pump
flow:
•Mono-energetic operation
The electric emergency/auxiliary heater guaran-
tees the heating operation as well as higher water
temperatures if the outside temperature falls be-
low the bivalent point.
•Emergency operation
If the heat pump malfunctions, the heating will be
taken over by the electric emergency/auxiliary
heater.
•Heat-up program
(underfloor heating only)
For return temperatures <25 °C, the electric emergen-
cy/auxiliary heater must take over the drying out of the
flooring screed!
The drying out cannot be carried out using the heat
pump as the system temperatures are too low and,
during the de-icing cycle the frost protection cannot be
guaranteed.
At the end of the drying out program, the electric
emergency/auxiliary heater can be disconnected if it is
not needed for the normal appliance operation.
Please note that the emergency operation cannot be
activated during the drying out program.
Anti-legionella switching
The electric emergency/auxiliary heater will be auto-
matically switched on if the anti-legionella program is in
place. The water will be regularly heated to 60 °C as
protection against Legionella.

BA_OLW I OTE3_SW5x_EN_20160815_V2 19 / 48
10 Operation
The heat pump operation takes place by means of the
basic operating panel. This is easily accessible in a
plastic housing mounted on the heat pump. The user
has 2 knobs and a lit display at his disposal
(Fig. 26).
Fig. 26 : Basic control panel
The heat pump has no
separate main switch. In emergency the
system MUST be switched off by means
of the specified circuit breakers.
The circuit breakers MUST be so reachable as to en-
sure a switching off at any time.
Further notes on the control operation can be found
in the current OTE Operating Instructions,
which are supplied with every heat pump.
10.1 Safety functions
Following safety features are implemented from both
Hard- and Software:
- Electronic control and safety devices for the
compressor
- High pressure pressostat
- Start delay to avoid
compressor chopping.
- Frost protection function
- Start-up- and run-down times of the fans
10.2 Running costs
During the first heating season, higher running costs
can generally be expected, depending on the residual
moisture in the building - up to 50%.
10.2.1 Flow temperatures
In order to achieve an optimum heat pump operation,
the lowest possible heating system flow temperatures
(and hot water temperatures) are to be aimed at. The
max. system temperature for heat pumps of the
OLW Series is to be limited to 60°C.
NOTE:
An increase of the room temperature by 1°C means a
5-7% increase in energy consumption.
10.2.2 Ventilation
Intermittent intensive ventilation according to own
requirements should be carried out, especially during
the heating period. Intermittent intensive ventilation is
much more energy-efficient
and thus more economical.
Continuous ventilation should be avoided on principle.

BA_OLW I OTE3_SW5x_EN_20160815_V2 20 / 48
11 Maintenance
11.1 Service work
Accessibility of the heat pump and ancillary appli-
ances is to be ensured for service work at all
times!
The heat pump operates essentially maintenance-free.
It must, however, be ensured that:
- the evaporator is free from leaves and twigs
or any other foreign bodies,
- the condensation can drain off,
- the heating circuit contains enough water
NOTE:
In order to prevent additional costs, it is recommended
to have the heat pump serviced at least once per year.
Furthermore,
legal regulations require that heating appliances be
checked and serviced regularly by the user.
OCHSNER can, if desired, offer a service contract in
order to carry out any necessary leakage tests and
checking of safety equipment of
the heat pump.
If required, please contact our customer service de-
partment.which will test the functionability, efficiency
and safety functions of the machine as well as check-
ing the control and regulation equipment. Your ad-
vantages of servicing: Correctly carried out servicing
not only saves energy, it also protects the environ-
ment. Furthermore, the correct care of the heating
system is a necessary prerequisite in order to safe-
guard the operational life of the heat pump for many
years. This gives the system user increased protection
against malfunctioning and ensures guarantee claims.
A
service contract provides continuity. In order to ensure
that
the monitoring and care of the heat pump is carried out
at regular intervals,
it is recommended to conclude a service contract. A
fully filled out protocol documents the working results
and the machine's condition.
The water pressure in the heating system is to be
monitored by the system operator and adjusted if the
the pressure is too high or too low.
The flow rates in the heating system are to be moni-
tored with the flow meters specified by OCHSNER.
Furthermore, the specified system service intervals as
well as the system checks must be adhered to.
If, during larger reconstruction work or after burst pip-
ing the majority of the water in the heating system has
to be drained off and refilled, this must be carried out in
the presence of the OCHSNER works customer ser-
vice / OCHSNER authorised partner (see Logbook)
If exceptional refilling work is to be carried out (e.g.
reconstruction work or after burst piping), a current
water test report is to be made and, if necessary, using
this report, additives must be used when refilling the
heating system.
Note
On request, OCHSNER can offer a maintenance con-
tract. If required, please contact our customer service
department.
11.2 Cleaning
Appliance and environmental damage
Service work, for instance checking the electrical safe-
ty, must only be carried out by a specialist electrician.
Protect the appliance from dust and dirt during the
construction phase.
A moist cloth is sufficient to care for the plastic
and metal parts. Do not use scouring or dissolving
cleaning agents.
Check the condensate drain function once per
month (visual control). Check whether water has
accumulated under or alongside the appliance. Ob-
serve the Section "Troubleshooting".
We recommend an annual inspection (determination of
current condition) and, if required, servicing (estab-
lishment of correct condition) by a specialist installer or
the OCHSNER Customer Service.
11.3 Customer Service
Should defects occur in your appliance,
in spite of the high-quality components used and the
diligence shown during production, please inform your
contractual partner or the OCHSNER customer service
with information on the serial number and the heat
pump module under the following telephone numbers:
Customer Service Austria:
Tel.: [phone]
E-Mail: [email protected]
Customer Service Germany:
Tel.:[phone] - 495
E-Mail: [email protected]
Customer Service Switzerland:
Tel.:[phone] - 99
E-Mail: [email protected]
The serial number and the heat pump model are to be
found on the rating label. The rating label is on the
outer rear panel of the heat pump.