alphainnoTec LWV Series User manual

www.alpha-innotec.com
83059100kUK
OPERATING MANUAL
LWV – SERIES
UK
Air/Water heat pumps
Indoor installation

2Subject to change without notice | 83059100kUK | ait-deutschland GmbH
Table of contents
1 About this operating manual ...................... 3
1.1 Validity....................................................... 3
1.2 Reference documents............................... 3
1.3 Symbols and markings.............................. 3
1.4 Contact...................................................... 4
2 Safety ............................................................... 4
2.1 Intended use ............................................. 4
2.2 Personnel qualifications............................ 4
2.3 Personal protective equipment ................. 4
2.4 Residual risks............................................ 5
2.5 Disposal .................................................... 5
2.6 Avoid damage to property......................... 5
3 Description...................................................... 6
3.1 Delivery condition ..................................... 6
3.2 Layout ....................................................... 6
3.3 Accessories............................................... 7
3.4 Function .................................................... 7
4 Operation and care....................................... 8
4.1 Energy-conscious and environmentally-
aware operation ........................................ 8
4.2 Care .......................................................... 8
5 Delivery, storage, transport and
installation ....................................................... 8
5.1 Scope of supply ........................................ 8
5.2 Storage...................................................... 9
5.3 Unpacking and transport........................... 9
5.4 Installation............................................... 10
5.5 Installation of air ducting ......................... 12
5.6 Attach side walls, rear wall and cover..... 12
6 Installation of hydraulic system................ 12
7 Electrical installation................................... 13
8 Flushing, filling and venting...................... 17
8.1 Heating water quality .............................. 17
8.2 Flush, fill and vent the heating circuit...... 18
9 Insulate hydraulic connections ................ 18
10 Set the overflow valve................................ 18
11 Commissioning ............................................ 19
12 Maintenance................................................. 20
12.1 Basic principles....................................... 20
12.2 Maintenance after commissioning .......... 20
12.3 Maintenance as required ........................ 20
12.4 Clean and flush condenser ..................... 21
12.5 Yearly maintenance................................. 21
13 Faults.............................................................. 21
14 Dismantling and disposal.......................... 21
14.1 Dismantling ............................................. 21
14.2 Disposal and recycling ............................ 21
Technical data / Scope of supply................... 22
Performance curves.......................................... 23
LWV 82R1/3 ..................................................... 23
LWV 122R3 ...................................................... 25
Dimensonal drawings........................................ 27
Installation plans................................................. 29
Coastal installation............................................. 37
Hydraulic integration.......................................... 38
LWV with hydraulic station ............................... 38
LWV with buffer tank in series
and hydraulic module.............................. 39
LWV with separation tank ................................ 40
Keys hydraulic integration ................................ 41
Circuit diagrams.................................................. 42
LWV 82R1/3 ..................................................... 42
LWV 122R3 ...................................................... 47

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1 About this operating manual
This operating manual is part of the unit.
Before working on or with the unit read the
operating manual carefully and follow it for all
activities at all times, especially the warnings and
safety instructions.
Keep the operating manual to hand at the unit and
hand over to the new owner if the unit changes
hands.
If you have any questions or anything is unclear,
ask the local partner of the manufacturer or the
factory’s customer service.
Note and follow all reference documents.
1.1 Validity
This operating manual refers solely to the unit identified
by the nameplate ( “Nameplates”, page 7).
1.2 Reference documents
The following documents contain additional
information to this operating manual:
Planning & design manual, hydraulic integration
Operating manual of the hydraulic unit or the wall-
mounted controller
Operating manual of the heating and heat pump
controller
Brief description of the heat pump controller
Operating manual of the expansion board
(accessories)
Log book
1.3 Symbols and markings
Identification of warnings
Symbol Meaning
Safety-relevant information.
Warning of physical injuries.
Safety-relevant information.
Warning of physical injuries.
Flammable materials /

Safety-relevant information.
Warning of physical injuries.
Flammable materials /

Symbol Meaning
Safety-relevant information.
Warning of physical injuries.
Danger of fatal injury due to
electric current.
DANGER Indicates an imminent danger re-
sulting in severe injuries or death.
WARNING Indicates a potentially dangerous
situation, which can result in se-
vere injuries or death.
CAUTION Indicates a potentially dangerous
situation, which can result in mod-
erate or minor injuries.
IMPORTANT Indicates a potentially dangerous
situation, which can result in ma-
terial damage.
Symbols in the document
Symbol Meaning
Information for specialist
Information for operator
Prerequisite for an action
Procedural instructions:
Single-step instruction for action
1., 2., 3., … Procedural instructions:
Numbered step within a multi-step
instruction for action. Adhere to
the given sequence.
Additional information, e.g. a note
for making work easier, informa-
tion on standards
Reference to further information
elsewhere in the operating manual
or in another document
List
Secure connections against twisting

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1.4 Contact
Addresses for purchasing accessories, for service
cases or for answers to questions about the unit and
this operating manual can be found on the internet and
are kept up-to-date:
www.alpha-innotec.com
2 Safety
Only use the unit if it is in proper technical condition
and only use it as intended, safely and aware of the
hazards, and follow this operating manual.
2.1 Intended use
The unit is designed for household use and is solely
intended for the following functions:
Heating
Domestic hot water preparation (optional, with
accessories)
Cooling, reversible
Proper use includes complying with the operating
conditions ( “Technical data / Scope of supply”,
page 22) and the operating manual and noting
and following the reference documents.
When using the local regulations note: laws,
standards, guidelines, directives.
All other uses of the unit are not as intended.
2.2 Personnel qualifications
The operating manuals supplied with the product are
intended for all users of the product.
The operation of the product via the heating and heat
pump control and work on the product which is intend-
ed for end customers / operators is suitable for all age
groups of persons who are able to understand the ac-
tivities and the resulting consequences and can carry
out the necessary activities.
Children and adults who are not experienced in han-
dling the product and do not understand the neces-
sary activities and the resulting consequences must
be instructed and, if necessary, supervised by persons
experienced in handling the product and who are re-
sponsible for safety.
Children must not play with the product.
The product may only be opened by qualified personnel.
All procedural instructions in this operating manual
are intended excusively for qualified and skilled
personnel.
Only qualified, skilled personnel is able to carry out
the work on the unit safety and correctly. Interference
by unqualified personnel can cause life-threatening
injuries and damage to property.
Ensure that the personnel are familiar with the lo-
cal regulations, especially those relating to work-
ing safely and in awareness of the hazard risks.
Ensure that the personnel are qualified to handle
refrigerant.
Work on the refrigerating circuit may only be car-
ried out by qualified personnel with appropriate
qualifications for refrigeration system installation.
Work on the electrics and electronics may only be
carried out by electrical technicians.
Any other work on the system may only be car-
ried out by qualified personnel (heating installer,
plumbing installer).
During the warranty and guarantee period, service
work and repairs may only be carried out by personnel
authorised by the manufacturer.
2.3 Personal protective equipment
During transport and work on the unit, there is a risk of
cuts due to the sharp edges of the unit.
Wear cut-resistant protective gloves.
During transport and work on the unit, there is a risk of
foot injuries.
Wear safety shoes.
When working on liquid-conveying lines, there is a risk
of injury to the eyes due to leakage of liquids.
Wear safety goggles.

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2.4 Residual risks
Electric shock
Components in the unit are live with life-threatening
voltage. Before opening the unit panelling:
Disconnect unit from power supply.
Protect unit against being switched back on again.
Residual voltage at the inverter. Wait 90 seconds
before opening the device.
Existing earthing connections within housings or on
mounting plates must not be altered. If this should nev-
ertheless be necessary in the course of repair or as-
sembly work:
Restore earthing connections to their original con-
dition after completion of the work.
Injury due to moving parts
Switch device on only with air ducts and weather
and/or rain protection grid fitted.
Injuries caused by high temperatures
Before working on the unit, let it cool down.
Safety instructions and warning symbols
Observe the safety instructions and warning sym-
bols on the packaging and on and in the unit.
Injuries and environmental damage due to
refrigerant
The unit contains harmful and environmentally
dangerous refrigerant. If refrigerant leaks from the unit:
1. Switch off unit.
2. Thoroughly ventilate installation area.
3. Notify authorised after sales service.
2.5 Disposal
Environmentally hazardous substances
Improper disposal of environmentally hazardous sub-
stances (e.g. refrigerant, compressor oil) damages the
environment:
Collect substances safely.
Dispose of the substances in an environmental-
ly-friendly manner according to the local regulations.
2.6 Avoid damage to property
The ambient air at the heat pump installation site, as
well as the air drawn in as a heat source, must not
contain any corrosive constituents!
Constituents such as
Ammonia
Sulphur
Chlorine
Salt
Sewer gasses, flue gasses
can cause damage to the heat pump, which could lead
to the complete failure / destruction of the heat pump!
Cooling
If the heating surfaces are used for heating and cool-
ing, the control valves must be suitable for heating and
cooling.
By cooling with low flow temperatures, condensate
can be expected to form on the heat distribution sys-
tem as the temperature falls below the dew point. If
the heat distribution system is not designed for these
operating conditions, it must be protected by appropri-
ate safety devices, e.g. dew point monitor (purchasa-
ble accessory).
Decommissioning / draining the heating
If the system / heat pump is decommissioned or
emptied, after it has been filled already, it is necessary
to ensure that the condenser and any heat exchangers
present have been completely emptied in the event
of frost. Residual water in heat exchangers and
condensers can result in damage to components.
Empty system and condenser completely, open
vent valves.
Blast out with compressed air if necessary.
Improper action
Requirements for minimum scale and corrosion
damage in hot water heating systems:
Proper planning, design and commissioning
Closed system with regard to corrosion
Integration of an adequately dimensioned
pressure maintaining device
Use of demineralised heating water (VE water) or
water corresponding to the VDI 2035 norm

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Regular servicing and maintenance
If a system is not planned, designed, started up and
operated in accordance with the given requirements,
there is a risk that the following damage and faults will
occur:
Malfunctions and the failure of components, e.g.
pumps, valves
Internal and external leaks, e.g. from heat
exchangers
Cross-section reduction and blockages in
components, e.g. heat exchanger, pipes, pumps
Material fatigue
Gas bubbles and gas cushion formation
(cavitation)
Negative effect on heat transfer, e.g. formation of
coatings, deposits, and associated noises, e.g.
boiling noises, flow noises
Note and follow the information in this operating
manual for all work on and with the unit.
Unsuitable quality of the fill and make-up
water in the heating circuit
The efficiency of the system and the life of the heat
generator and the heating components depend
decisively on the quality of the heating water.
If the system is filled with untreated drinking water,
calcium and magnesium precipitate as mineral scale.
Limescale deposits form on the heat transfer surfaces
of the heating. The efficiency drops and energy
costs rise. In extreme cases the heat exchangers are
damaged.
Fill the system with deionised heating water
(VE water) or with water corresponding to the VDI
2035 norm only (low-salt operation of the system).
3 Description
3.1 Delivery condition
1 Blind cover and louvre grille
2 Side wall (2-piece) and cover
3 Rear wall
4 Side wall (complete)
5 Front wall
6 Supporting crosspiece (left and right;
only remove after positioning at the final
installation site!)
7 Lashing straps (with grip openings)
8 Wooden strip / fan support
3.2 Layout
NOTE
This section essentially names the
components relevant for fulfilling the tasks
described in this operating manual.

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The heat pump module
1 Evaporator module
2 Fan module
3 Fan
4 Refrigerant circuit module
The refrigerant circuit module
1 Plug connection to the fan module
2 Electrical switch box
3 Expansion valve (cooling, defrost)
4 Condenser
5 Expansion valve (heating)
6 Compressor (in the insulated housing)
7 Filter dryer
8 Inverter unit
Nameplates
One nameplate is attached to the heat pump module in
the rear facade cut-out at the factory.
Two further nameplates are included in the delivery.
Stick one nameplate on the outside of the unit on
the lower facade of the switch box side.
Glue one nameplate into the logbook fpr heat
pumps.
The nameplates contain the following information at
the very top:
Model, item number
Serial number
The nameplates also contain an overview of the most
important technical data.
3.3 Accessories
The following accessories are available for the unit
through the manufacturer's local partner:
Electrical connection kit
Air / magnetic sludge separator
Domestic hot water tank
Buffer tank
Room thermostat to switch the cooling function
Dew point monitor to protect a system with cooling
function at low flow temperatures
Room control panel to control the main functions
from the living room
3.4 Function
Liquid refrigerant is evaporated (evaporator), the
energy for this process is environmental heat and
comes from the outside air. The gaseous refrigerant
is compressed (compressor), this causes the pressure
to rise and therefore the temperature too. The
gaseous refrigerant at a high temperature is liquefied
(condenser).
The high temperature is hereby discharged to the
heating water and is used in the heating circuit.
The liquid refrigerant at a high pressure and high
temperature is depressurised (expansion valve).
The pressure and temperature drop and the process
begins again.
The heated heating water can be used for the domestic
hot water charging or for the building heating. The
temperatures required and use are controlled by the
heat pump controller. Reheating, drying out screed or
increasing the domestic hot water temperature can be
carried out using an electric heating element, which
is activated by the heat pump controller as and when
necessary.

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4.2 Care
Wipe down the outside of the unit only using a damp
cloth or cloth with mild cleaning agent (washing-up
liquid, neutral cleaning agent). Do not use any harsh,
abrasive, acid or chlorine-based cleaning agents.
5 Delivery, storage, transport
and installation
IMPORTANT
Damage to the housing and the unit components
due to heavy objects.
Do not place any objects on the unit.
5.1 Scope of supply
Check delivery immediately after receipt for
externally visible damage and completeness.
Notify supplier of any defects immediately.
The accompanying parts package contains
Package 1
 
 
Package 2
1 tube lubricant
1 HT-bend DN 40mm 87°
1 protective cover for plug
4 EPP screws
In façade package
2 screws M5x16, black for the front wall
15 screws for façade mounting M5x9
1 plastic louvre grille
1 heat pump blind cover
Swelling tape for louvre grille and blind cover
Documents (manuals, ERP data and label)
Type sticker
The integrated vibration decouplers for the hydraulics
prevent structure-borne sound and vibrations from
being transferred into the fixed pipes and therefore
into the building.
Cooling
Cooling is integrated in the units. The following
options are possible for units with cooling function
( operating manual of the heating and heat pump
controller):
Active cooling
Cooling down to a minimum flow temperature
of 18°C possible in combination with hydraulic
module or hydraulic station. Possible to 7°C in
conjunction with wall-mounted controller
Cooling below 18 °C is only possible in the case
󰀨
Control of the cooling function via the heating and
heat pump controller
Changeover between heating and cooling
operation
Network connection on the control panel
The control panel can be connected to a computer or
network via a network cable. The heating and heat pump
controller can then be controlled from the computer
or from the network. Furthermore, the manufacturer’s
internet-based service can also be used.
4 Operation and care
NOTE
The unit is operated via the control panel
of the heating and heat pump controller
( operating manual of the heating and
heat pump controller).
4.1 Energy-conscious and
environmentally-aware operation
The generally accepted requirements for an energy-
conscious and environmentally-aware operation of a
heating system also apply when using a heat pump.
The most important measures include:
No unnecessarily high flow temperature
No unnecessarily high domestic hot water
temperature
Do not open windows with gap / tilt open
(continuous ventilation), but instead open wide for
a short time (shock ventilation).
Make sure that the controller settings are correct.

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5.2 Storage
Do not unpack the unit until directly before
installation if possible.
Store unit protected against
Moisture/damp
Frost
Dust and dirt
5.3 Unpacking and transport
Notes on safe transport
The unit is heavy ( “Technical data / Scope of
supply”, page 22). There is a risk of injuries or
damage to property if the unit falls or overturns.
The hydraulic connections are not designed for
mechanical loads.
Do not lift or transport the unit by the hydraulic
connections.
Transport the unit preferably with a pallet truck,
alternatively with a handcart or by carrying
Do not tilt the heat pump module by more than 45°.
The lashing straps on the heat pump module may
only be used when carrying by hand.
Transport with a pallet truck
Transport the unit to the place of installation
packaged and secured on a wooden pallet.
Unpacking
1. Remove plastic films. Ensure that you do not
damage the unit.
2. Dispose of the transport and packaging material
in an environmentally friendly way and in
accordance with local regulations.
3. Remove the film from the plastic element of the
front panel in the place of installation.
Lift the housing walls off the pallet and set
down.
If the unit is not transported by a pallet truck: do not lift
off the pallet until after unpacking and setting down the
housing panels.
The façade front is located in front of the device
The single-part and two-part side wall are located
on the rear side
Optional disconnection of the fan module
NOTE
The fan module can be removed if required
(narrow passages ) .
1. Disconnect the plug-in connection of the load and
bus cable at the top left on the refrigerant circuit
switch box.
2. Remove the 4 screws.
3. Remove the fan module and set it down safely.
4. Break off the projecting struts on the supporting
crosspieces.
1 Lashing straps with grip openings
2 Styrofoam struts
3 Screws on the fan module
Disconnecting the evaporator module
NOTE
The evaporator module can be disconnected
from the refrigerant circuit module if required.
This work must be carried out by the factory
customer service department!
Please contact the factory customer service
department.

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Carrying the unit and transporting with a
handcart
Housing walls are set down.
There are two lashing straps around the heat pump
module with grip openings at different heights. These
can be used for lifting and carrying.
To provide additional stability, two supporting cross-
pieces are clamped in the side cut-outs for the air
ducts. Do not remove these until transport is complete!
Transporting the heat pump module with a
handcart
1. Only place the heat pump module onto the
handcart with the narrow side, left or right.
2. Secure the heat pump module to the handcart
with lashing straps.
3. Transport the heat pump module to the installation
site.
5.4 Installation
CAUTION
In the air outlet area the air temperature is
approx. 5 K below the ambient temperature.
Under certain climatic conditions, an ice
layer can therefore form in the air outlet
area. Install the heat pump such that the
air blower does not discharge into footpath
areas .
Installation room and space requirements
NOTE
Note and follow the local regulations and
standards regarding the installation room and
space requirements. The table shows the
regulations according to EN 378-1 relevant
in Germany.
Refrigerant Limit value [kg/m³]
R 134a 0.25
R 404A 0.52
R 407C 0.31
R 410A 0.44
R 448A 0.39
R 454B 0.358
“Technical data / Scope of supply”, page 22
Minimum room volume = Refrigerant capacity [kg]
Limit value [kg/m³]
NOTE
If several heat pumps of the same type are
installed, only one heat pump need to be
taken into account. If several heat pumps of
different types are installed, only the heat
pump with the largest refrigerant volume
needs to be taken into account.
Minimum volume corresponds to the requirements
for the refrigerant used.
Installation inside the building only.
Installation room is dry and frost-free.
Clearance dimensions are met
( “Installation plans”, from page 29).
The surface/floor is suitable for installation of the
unit:
level and horizontal
Load-bearing capacity for the unit's weight

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NOTE
The noise emissions of the heat pumps
must be taken into account in the respective
installation plans for air/water heat pumps.
The respective regional regulations must be
observed.
Aligning the unit
1. Align the heat pump module horizontally and
stably at the installation site using the height-
adjustable feet and a size 13 spanner. Adjustment
range: 20 mm. Then fasten with the size 17 lock
nuts.
If the fan module has been removed, this must
be reinstalled on the evaporator module. Attach
the 4 screws (①) and re-establish the two plug-in
connections of the load and bus cables.
2. Remove the two lashing straps.
3. Open the strap tensioner and turn the hook on the
base plate through 90°.
90°
4. Attach the swelling tape to the louvre grille and
blind cover by applying it around the edges and
then sticking it in place.
Heat pump installation instructions
5. Remove the two styrofoam crosspieces.
6. Install the blind cover and the louvre grille.
807xxx
Attach the louvre grille to the air outlet side (right
or left)! The blind cover on the opposite side.
7. Attach rear wall and screw firmly into place.
Heat pump installation instructions

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5.5 Installation of air ducting
Air discharge to right or left
Left air outlet Right air outlet
Ers. d.
Ers. f.
E
D
C
B
A
4 3 2 1
Air duct installation instructions
Wall duct installation instructions
IMPORTANT
The height difference between the vertical centre
of the air duct connections on the unit and the top
edge of the air inlet / air outlet on the building must
not exceed 2 m.
5.6 Attach side walls, rear wall and
cover
Heat pump installation instructions
1. Fasten rear wall.
2. Hang side walls from above. Fasten at the front
with a screw in the middle. Fasten with 2 screws
at the bottom.
3. Fit cover and screw into place.
6 Installation of hydraulic system
IMPORTANT
Avoid open heating systems and / or heating sys-
tems that are not oxygen diffusion-tight.
If this is not possible, a system separation must be
installed.
Depending on the dimensioning of the heat ex-
changer and the additionally required circulation
pump, the system separation worsens the energy
efficiency of the system.
IMPORTANT
Dirt and deposits in the (existing) hydraulic system
can cause damage to the heat pump.
Ensure that a air / magnetic sludge separator is
installed in the heating circuit.
Ensure that a dirt filter with a mesh size of 0.7 mm
is installed as close as possible to the heating wa-
ter inlet (return).
Rinse the hydraulic system thoroughly prior to es-
tablishing the hydraulic connection of the heat
pump.
NOTE
If an existing system is being replaced, the
old vibration decoupling may not be reused.
IMPORTANT
Damage to the copper pipes due to unacceptable
loading!
Secure all connections against twisting.
Cross-sections and lengths of the pipes for the
heating circuit are adequately dimensioned.
The free pressing of the circulation pumps in the
heating circuit at least results in the throughput
required for the device type ( “Technical data /
Scope of supply”, page 22).
The hydraulic system must be equipped with a
buffer tank, the required volume of which depends
on your unit model.
“Technical data / Scope of supply”, page 22
The cables for the heating are fixed to the wall or
ceiling via a fixed point.
1 Heating water supply
2 Condensate nozzle
3 Heating water return

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1. Insert the vent at the highest point of the heating
circuit.
2. Ensure that the working overpressures
(“Technical data / Scope of supply”, page 22)
are not exceeded.
Condensate connection
The outlet for the heating water safety valve and
the condensate from the air must be drained off in
accordance with the respective applicable standards
and regulations. Discharging the condensate and the
safety valve outlet into the sewers is only permitted via
a funnel waste trap, which must be accessible at all
times.
1. Fit an HT-bend onto the condensate outlet.
2. Route piping into the funnel waste trap.
Heat pump installation instructions
7 Electrical installation
7.1 Connect the electrical cables
IMPORTANT
Irreparable damage to the compressor due to wrong
rotating field (only applies to units with 400V con-
nection).
Ensure that there is a clockwise rotary field for the
compressor load infeed.
Basic information on the electrical connection
The specifications of the local energy supply
company may apply to electrical connections
Fit the power supply for the heat pump
with an all-pole miniature circuit-breaker
with at least 3 mm contact spacing (per
IEC 60947-2)
Note the level of the tripping current
( “Technical data / Scope of supply”,
page 22)
Comply with the electromagnetic compatibility
regulations (EMC regulations)
Lay unshielded power supply cables and
shielded cables (bus cable) sufficiently far apart
(> 100 mm).
The electrical connection of the heat pump with the
hydraulic unit or the wall-mounted controller is estab-
lished using the EVS8 or EVS accessory.
EVS 8: sockets and plugs for load and bus cables
with 8m cable each.
A maximum of 3 EVS 8 connections are possible.
EVS 8 installation instructions
EVS: sockets and plugs for load and bus cables.
Bus cable on site, maximum cable length of 30 m.
The bus cable must be a shielded cable of at least
4 x 0.5 mm².
As load cable:
For the 12 kW unit a 5 x 2.5 mm² cable with
protective conductor, Diameter of the sheath of
the electric cable 9 – 13mm²
For the 8 kW unit a 3 x 2.5 mm² cable with pro-
tective conductor, Diameter of the sheath of
the electric cable cable 9 – 13 mm²

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Mount the sockets (Ⓑ) towards the heat pump,
the plugs (Ⓢ) towards the hydraulic unit or the
wall-mounted controller.
Mounting EVS 8 / EVS (accessories)
1. Connect the compressor load cable to the five-pin
load cable socket.
1.1. Break a lock of one of the cable bushings (①)
carefully out of the pre-engaged strain relief
housing (②) and push the strain relief housing
approx. 50 cm over the load cable (③).
    
1.2. Strip the load cable 55mm.
55 mm
1.3. Shorten the live wires so that the PE conductor
has a lead of 8mm.
Example of a five-wire load cable:
8 mm
PE
1.4. Strip each wire 9 mm.
Example of a five-wire load cable:
9 mm
PE
9 mm
1.5. Insert the stripped wires into the pins (④).
Example of a five-wire load cable:
N
L1
L2
L3
If the load cable has single wires, insert each
of them as far as they will go:
With a three-wire load cable (230V compressor at
8kW device), insert the N and PE conductor in the
pins labelled accordingly and insert the L conduc-
tor in the L1 pin.
With a five-wire load cable (400V compressor
at 12 kW device), insert the N, PE, L1, L2 and L3
wires in the corresponding pins.
If the load cable has fine wire strands:
Twist the strands of each wire.
Example of a five-wire load cable:
N
L1
L2
L3
1.5.1. Insert an operating tool or screwdriver (2.5mm
blade width) in the connection lock of the neu-
tral conductor pin to unlock the connection lock.
1.5.2. Insert the twisted wire of the neutral conductor
as far as it will go into the neutral conductor pin.
Example of a five-wire load cable:
L3
L2
L1
N

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1.5.3. Pull the operating tool or screwdriver out of the
connection lock pin to lock the connection.
Example of a five-wire load cable:
L3
L2
L1
N
1.5.4. Insert the PE conductor and L conductor in the
same way in the corresponding pins:
With a three-wire load cable (230V compressor
at 8kW device), insert the PE conductor in the
pin labelled accordingly and insert the L con-
ductor in the L1 pin.
With a five-wire load cable (400V compressor
at 12 kW device), insert the L1, L2 and L3 wires
in the corresponding pins.
IMPORTANT
Check each inserted wire for tight fitting in its pin.
1.6. Push the strain relief housing (②) onto the wired
socket (④).
Example of a five-wire load cable:
N
L1
L2
L3
1.7. Align them correctly to each other: The top side
of the socket and the top side of the strain relief
housing are both marked with “TOP”.
1.8. Push the socket as far as it will go into the strain
relief housing.
1.9. Lock the top part of the strain relief housing firmly
onto the bottom part.
1.10. Screw the strain relief screw tight.
2. Connect the bus cable (communication) to the bus
cable socket.
2.1. Insert the contact spring (⑤) into pin 3 (⑥) up to
the limit stop.
The lugs on the broad end of the contact spring
must point upwards (in the direction of the num-
bers on the socket).
NOTE
If the contact spring is in the way when sub-
sequently inserting the wires of the bus ca-
ble, it can be disconnected and re-connected
after inserting the wires.
2.2. Strip the bus cable 30 mm.
30 mm

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2.3. Push the shielding braid back 10 mm over the
sheath.
2.4. Pull back the shielding foil up to the shielding braid
and cut off.
2.5. Strip each wire 9mm.
2.6. Twist the strands of each wire.
2.7. Insert the stripped wires into the pins.
2.7.1. Insert an operating tool or screwdriver (blade
2.5 x0.4 mm) in the connection lock on pin 5 to
unlock connection lock.
2.7.2. Place the cable with shielding braid onto the
contact spring from above and insert the brown
wire into pin 5 up to the limit stop.
2.7.3. Pull the operating tool or screwdriver out of the
connection lock pin to lock the connection.
2.7.4. Insert the three other wires in the same way into
the corresponding pins.
Assignments of the pins
white wire of the bus cable pin 1
green wire of the bus cable pin 2
Shielding braid on contact spring pin 3
yellow wire of the bus cable pin 4
brown wire of the bus cable pin 5
IMPORTANT
Check each inserted wire for tight fitting in its plug pin.
2.8. Place the shielding braid on the contact spring
and, if necessary, shorten it so that it does not go
beyond the contact spring.
2.9. Assemble the strain relief housing.
2.9.1. Snap the wired socket into the lower part (⑦) of
the strain relief housing.
2.9.2. Fit the strain relief (⑧) and clip into place until
the bus cable is clamped firmly.
IMPORTANT
The shielding braid must have a direct and firm con-
tact with the contact spring.
2.9.3. Snap the upper part of the housing (⑨) fully on-
to the lower part.

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3. Connect the wired sockets of the load cable and
the bus cable to the unit.
3.1. Remove the cover (①) for the plug-in connec-
tions on the back of the unit.
2x
1
3.2. Open the strain reliefs on the unit.
3.3. Insert the load cable socket (③) and bus ca-
ble socket (②) up to the limit stop into the corre-
sponding plugs.
2x
2
3
3.4. Route both cables through the strain reliefs,
close the strain reliefs and tighten the strain re-
liefs.
3.5. Mount the cover of the plug-in connections.
4. Guide the load and bus cable from the heat pump
to the electrical switch box of the hydraulic unit or
to the wall-mounted controller.
5. Mount the plugs on the load cable and the bus
cable in the same way as the sockets.
IMPORTANT
The wire assignment of the bus cable plug must
match the wire assignment of the bus cable socket.
“Assignments of the pins”, page 16
6. Insert the load cable plug and bus cable plug up
to the limit stop into the corresponding sockets on
the underside of the electrical switch box of the
hydraulic unit or in the wall-mounted controller.
Operating manual of the hydraulic unit or
Operating manual of the wall-mounted controller
8 Flushing, filling and venting
8.1 Heating water quality
NOTE
For detailed information refer, among other
things, to the VDI Guidelines 2035 “Vermei-
dung von Schäden in Warmwasserheizanla-
gen” (preventing damage in hot water heat-
ing systems).
1. Ensure that the ph-value of the heating water is
between 8.2 – 10, for aluminium materials be-
tween 8.2 – 9.
Ideally, the pH value should already be in the re-
quired range after filling. After 6 weeks at the lat-
est, it must have adjusted to the required range.
2. 
NOTE
If the required water quality is not achieved,
consult a company specialising in the treat-
ment of heating water.
3. Fill the system with deionised heating water
(VE water) or with water corresponding to the VDI
2035 norm only (low-salt operation of the system).
Advantages of low-salt operation:
Low corrosion-promoting properties
No formation of mineral scale
Ideal for closed heating circuits
4. Keep a system log for hot water heating systems
in which relevant planning data and the water
quality are entered (VDI 2035).

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8.2 Flush, fill and vent the heating
circuit
Outlet pipe of the safety valve is connected.
Ensure that the set pressure of the safety valve is
not exceeded.
IMPORTANT
Flush the heating circuit only in its flow direction.
NOTE
The venting program on the controller can
also be used to support the flushing and
venting process. It is possible to control
individual recirculating pumps and even the
switching valve through the venting program.
The valve motor then does not have to be
removed.
1. Pull the U-clip off the floor of the valve motor.
2. Pull the valve motor carefully off the 3-way switch-
ing valve.
3. Vent system at the respective highest point.
4. Vent heat pump.
9 Insulate hydraulic connections
Insulate hydraulic lines in accordance with local
regulations.
1. Open shut-off devices.
2. Perform a pressure test and check for leaks.
3. Insulate external piping on site.
4. Insulate all connections, fittings and pipes.
If the device is used for cooling below 18°C, the
insulation must be vapour diffusion-tight.
10 Set the overflow valve
NOTE
The activities in this section are only
necessary for the integration of storage
tanks in series
Complete the work steps quickly, otherwise
the maximum return temperature may be
exceeded and the heat pump switches to
high-pressure fault
Turn the adjusting knob at the overflow
valve to the right to increase the
temperature difference (the temperature
drop), turn it to the left to reduce it
System is running in heating mode (ideally in cold
condition).
The IBN assistant already provides the option, in the
event of the integration of the storage tank in series to
adjust the overflow valve according to to the hydrau-
lic system.
Confirm the IBN assistant or:
The “Set bypass valve” menu item is set by default to
“No”. The overflow valve adjustment function is deac-
tivated.

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The UWP control signal is the indication of the
currently required pump capacity in %
If the flow rate is the current flow rate (measuring
accuracy +/- 200 l/h)
1. Fully open the overflow valve, close the heating
circuits
2. If the “Set bypass valve” menu item is set from
“No” to “Yes”, the circulation pump is activated
with 100% – and the pump starts up.
3. If the control signal UWP reaches 100%, close
the overflow valve to the extent that the maximum
flow rate (“Technical data / Scope of supply”,
page 22) can be ensured.
1 Rotary-push button
2 Overflow valve
4. If you exit the “Set bypass valve” menu or at the
latest after one hour, the circulation pump switch-
es back to standard regulation
5. Open valves to heating circuit.
11 Commissioning
CAUTION
The unit may only be started up if the air
ducts, weather and/or rain louvres have
been installed and the facing panels are
closed.
Relevant planning & design data of the system is
documented in full
The competent energy supplier has been notified
of operation of the heat pump system
System is air-free
Installation check using the rough checklist has
been completed successfully
Clockwise rotating load infeed field is present at
the compressor (only applies to units with 400V
connection)
The system is installed and mounted in accord-
ance with this operating manual
The electrical installation has been carried out
properly in accordance with this operating manual
and local regulations
The power supply for the heat pump is equipped
with an all-pole circuit-breaker with at least 3 mm
contact spacing (IEC 60947-2)
The level of the tripping current is compliant
Heating circuit is flushed and vented
All shut-off devices of the heating circuit are open
The pipe systems and components of the system
are leak-tight
1. Carefully fill in and sign the notice of completion
for the heat pump systems.
2. In Germany: Send notice of completion for heat
pump systems and general checklist to the man-
ufacturer’s factory customer service department.
In other countries: Send notice of completion for
heat pump systems and general checklist to the
manufacturer’s local partner.
3. Arrange for the heat pump system to be com-
missioned by the manufacturer’s authorised after
sales service for a fee.
“12.2 Maintenance after commissioning”,
page 20

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12 Maintenance
NOTE
We recommend that you conclude a
maintenance agreement with an accredited
heating company.
12.1 Basic principles
The cooling circuit of the heat pump requires no
regular maintenance.
Local regulations among other things, require leak
checks beforehand and/or for a logbook to be kept for
certain heat pumps.
Ensure compliance with local regulations with
regard to the specific heat pump system.
12.2 Maintenance after commissioning
Immediately after commissioning, check all installed
dirt traps for dirt and clean them if necessary.
Switch off the system while the check and clean-
ing is being carried out.
Next checking and cleaning at the latest 2 weeks after
commissioning.
12.3 Maintenance as required
Checking and cleaning the components of the
heating circuit, e.g. valves, expansion vessels, re-
circulating pumps, filters, dirt traps.
The air intake and exhaust openings must always
be free of obstructions and kept clear. Therefore,
check for unimpeded air infeed accordingly. Con-
strictions or even blockages which, for example
occur
when applying house insulation with polysty-
rene balls
     -
tons etc.)
through foliage, snow, icing or similar weath-
er-related deposits
through vegetation (bushes, tall grass etc.)
 
etc.)
and which must be prevented and/or removed im-
mediately.
Check at regular intervals that the condensate
can drain out of the device freely, without ob-
struction. To this end, check the condensate pan
in the device regularly for dirt/clogging and clean
as necessary. Also check the evaporator from all
sides and clean if necessary.
Check evaporator and condensate pan
and clean if required
1. Remove the front panel and the cover, thus gain-
ing access to the cleaning opening (①).
2. After the cover is removed (①), the entire conden-
sate pan area before (②) and after (③) the evap-
orator is visible and can be cleaned if necessary.
Heat source
inlet sensor
As an alternative, the lateral air ducts, the side walls,
the louvre grilles and blind covers can be removed (if
necessery also the fan module) , to obtain better ac-
cess.
“Optional disconnection of the fan module“,
page 9