alphainnoTec LWP User manual

UK
83059700jUK
Air/Water Heat Pumps
Outdoor installation
Operating Manual
LWP

2Subject to change without notice | 83059700jUK | ait-deutschland GmbH
Table of contents
1 About this operating manual ...................... 3
1.1 Validity....................................................... 3
1.2 Other applicable documents ..................... 3
1.3 Symbols and markings.............................. 3
1.4 Contact...................................................... 4
2 Safety ............................................................... 4
2.1 Intended use ............................................. 4
2.2 Personnelqualications............................ 4
2.3 Personal protective equipment ................. 4
2.4 Residual risks............................................ 4
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 and environmentally conscious
operation ................................................... 8
4.2 Maintenance.............................................. 8
5 Delivery, storage, transport and
installation ....................................................... 8
5.1 Scope of supply ........................................ 8
5.2 Storage...................................................... 8
5.3 Transport and unpacking .......................... 8
5.4 Installation................................................. 9
6 Hydraulic installation ...................................11
6.1 Vertical connection ................................. 12
6.2 Horizonzal connection ............................ 13
6.3 Condensate drain.................................... 13
7 Electrical installation................................... 13
8 Flushing,llingandventing...................... 14
8.1 Heating water quality .............................. 14
8.2 Flushing,llingandventing
the heating circuit.................................... 15
9 Insulate hydraulic connections ................ 15
10 Settheoverowvalve................................ 15
11 Commissioning ............................................ 16
12 Maintenance................................................. 17
12.1 Basic principles ....................................... 17
12.2 Maintenance as required ........................ 17
12.3 Cleanandushcondenser ..................... 17
12.4 Yearly maintenance................................. 17
13 Faults.............................................................. 18
14 Dismantling and disposal.......................... 18
14.1 Dismantling ............................................. 18
14.2 Disposal and recycling ............................ 18
Technical data / scope of supply.................... 19
Performance curves.......................................... 20
Dimensional drawings....................................... 23
Installation plans................................................. 24
Installation plan / base plan.............................. 24
Minimum clearances ........................................ 25
Minimum clearances parallel connection......... 26
Coastal installation............................................. 27
Condensate line.................................................. 28
External condensate line connection ............... 28
Internal condensate line connection ................ 29
Hydraulic integrations........................................ 30
LWP 450AR3 with multifunction tank as
domestic hot water tank
Heating.................................................... 30
LWP 450AR3 with multifunction tank as
domestic hot water tank
Heating and cooling ................................ 31
Keys hydraulic integration ................................ 32
Terminal diagrams ............................................. 33
Wall-mounted controller ................................... 33
Expansion board .............................................. 35
Circuit diagrams.................................................. 36

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1 About this operating manual
This operating manual is part of the device.
►Before working on or with the device, 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 device
and hand over to the new owner if the device
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identied
by the nameplate ( “Nameplate", page 6).
1.2 Other applicable documents
The following documents contain additional
information for this operating manual:
●Planning & design manual, hydraulic integration
●Operating manual of the heating and heat pump
controller
●Brief description of the heat pump controller
●Operating manual of the expansion board
●Log book
1.3 Symbols and markings
Identicationofwarnings
Symbol Meaning
Safety-relevant information.
Warning of physical injuries.
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
Instruction:
Single-step instruction for action
1., 2., 3., … 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

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1.4 Contact
Addresses for purchasing accessories, for service
cases or for answers to questions about the device
and this operating manual can be found on the internet
and are kept up-to-date:
●Germany: www.alpha-innotec.de
●EU: www.alpha-innotec.com
2 Safety
Only use the device when it is in awless technical
condition and only use it as intended, safely and aware
of the hazards, and follow this operating manual.
2.1 Intended use
The device is solely intended for the following
functions:
●Heating
●Domestic hot water preparation (option, with
accessories)
●Cooling, reversible
►Proper use includes complying with the operating
conditions ( "Technical data / scope of supply",
page 19) as well as the operating manual and
any other applicable documents.
►Observe local regulations during use: laws,
standards, guidelines, directives.
All other uses of the device are not as intended.
2.2 Personnelqualications
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qualiedpersonnel.
All instructional information in this operating manual is
intendedsolelyforqualied,skilledpersonnel.
Onlyqualied,skilledpersonnelareabletocarryout
the work on the unit safely and correctly. Interference
by unqualied personnel can cause life-threatening
injuries and damage to property.
►Ensure that personnel are familiar with local
regulations, especially those on safe and hazard-
aware working.
► Allowqualiedpersonnelwith"electrical"training
only to carry out work on the electrical and
electronic systems.
► Onlyallowqualied,skilledpersonneltoperform
any other work on the system, e.g.
●Heating installers
●Plumbers
●Refrigeration plant manufacturers (maintenance
work)
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
There is a risk of cutting your hands on sharp edges of
the device.
►Wear cut-resistant protective gloves during
transport.
2.4 Residual risks
Electric shock
Components in the device are energised with life-
threatening voltage. Before work is performed on the
unit:
►Disconnect the device from the power supply.
►Protect the device from being switched back on
again.
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
►If the heat pump is operating, the fan protection
grillesmustbetted.

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Injuries due to high temperatures
If desuperheating is used, very high temperatures can
arise at the desuperheater and the desuperheater
lines. Contact can result in burns.
►Do not touch the desuperheater or its lines when
operating or afterwards.
Injuries and environmental damage due to
refrigerant
The unit contains harmful and environmentally
dangerous refrigerant. If refrigerant leaks from the unit:
1. Switcho󰀨unit.
2. Notify authorised after sales service.
2.5 Disposal
Media harmful to the environment
Improper disposal of environmentally hazardous
media (refrigerant) damages the environment:
►Collect media safely.
►Dispose of the media in an environmentally
compatible way in accordance with 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,uegasses
can cause damage to the heat pump, which could lead
to the complete failure / destruction of the heat pump!
Decommissioning/emptying heating
If the system / heat pump is decommissioned or
emptied,afterithasbeenlled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
●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 exchangers, pipes, pumps
●Material fatigue
●Gas bubbles and cushion gas formation
(cavitation)
● Negative e󰀨ect on heat transfer, e.g. formation
of coatings, deposits and associated noises, e.g.
boilingnoises,ownoises
►Note and follow the information in this operating
manual for all work on and with the device.
Unsuitablequalityofthellandmake-up
water in the heating circuit
Thee󰀩ciencyofthesystemandtheservicelifeofthe
heat generator and the heating components depend
decisively on the quality of the heating water.
Whenthesystemislledwithuntreateddrinkingwater,
calcium precipitates as scale. Lime scale deposits
accumulate on the heat transfer surfaces of the
heating.Thee󰀩ciencydropsandenergycostsrise.In
extreme cases, the heat exchangers will be 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).

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3 Description
3.1 Delivery condition
Unit packed in a wooden strip with styrofoam /
PEanglestripsandwrappedinplasticlm
1 Holes for steel pipes (“Transport with a
crane", page 9)
2 Cut-outs for transport with a forklift
IMPORTANT
Only transport the unit to the installation location in its
original packaging.
3.2 Layout
NOTE
This section essentially names the
components relevant for fullling the tasks
described in this operating manual.
1 Switch box cover
2 Fans
3 Evaporator
4 Condenser
5 Compressors
Nameplate
The nameplate is attached at the following point on
the unit:
●On the switch box side (left)
bottom right

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3.3 Accessories
The following accessories are available for the device
through the manufacturer's local partner:
●Domestic hot water tank
●Air / magnetic sludge separator
●Bu󰀨ertank
●Room thermostat to switch the cooling function
●Dew point monitor to protect a system with cooling
functionatlowowtemperatures
●Recirculating pumps
●Switching valves
●Connection kit with vibration decoupling for
heating circuit
●Connection kit with vibration decoupling for
desuperheater
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liqueed
(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 by using an electric heating element, which
is activated by the heat pump controller as and when
necessary.
The vibration decouplers (accessories) for the
hydraulics prevent structure-borne sound and
vibrations from being transferred into the xed 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 for the heating and heat pump
controller):
●Active cooling
●Cooling below 18 °C is only possible in the case
ofhydraulicintegrationwithseparationbu󰀨ertank
●Control of the cooling function via the heating and
heat pump controller
●Changeover between heating and cooling
operation

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5 Delivery, storage, transport
and installation
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
●The wall-mounted controller and the outdoor
sensor as an accompanying package. The box
with these parts is in the free space in front of the
condenser
●A mailing envelope with 4 anti-slip mats for setting
down is attached to the outside of the device
5.2 Storage
►Do not unpack the unit until directly before
installation at the installation location.
►Store unit protected against
●Moisture/damp
●Frost
●Dust and dirt
5.3 Transport and unpacking
Notes on safe transport
The device is heavy ( "Technical data / scope
of supply", page 19). There is a risk of injuries or
damage to property if the device falls or overturns.
There is a risk of cutting your hands on sharp edges of
the device.
►Wear cut-resistant protective gloves.
The hydraulic connections are not designed for
mechanical loads.
►Do not lift or transport the device by the hydraulic
connections.
4 Operation and care
NOTE
The device is operated via the control panel
of the heating and heat pump controller
( operating manual for the heating and
heat pump controller).
4.1 Energy and environmentally
conscious operation
The generally accepted requirements for energy
conscious and environmentally conscious operation of
a heating system also apply to the use of a heat pump.
The most important measures include:
● Nounnecessarilyhighowtemperature
●No unnecessarily high domestic hot water
temperature (note and follow local regulations)
●Do not open windows with gap / tilt open
(continuous ventilation), but instead open wide for
a short time (shock ventilation).
●Always ensure that the controller settings are
correct.
4.2 Maintenance
Wipe down the outside of the device only using a damp
cloth or cloth with mild cleaning product (washing up
liquid, neutral cleaning product). Do not use any harsh,
abrasive, acid or chlorine-based cleaning products.

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Ideally, the device should be transported with a lift
truck.
►Do not tilt the heat pump by more than 45°.
Transport with a crane
≈730kg
≈730kg
Variant 1 Variant 2
Appropriate lifting equipment with a load capacity cor-
responding to the weight of the unit must be available
on site.
This includes:
4 slings withsu󰀩cientloadcapacity
(length per item≥4m)
2 steeltubeswithsu󰀩cientloadcapacity
(length per item1.1m,Ø≤35mm)
1. Slide the steel tubes left and right through the side
holes of the packed device base.
2. Hook the slings into the steel tubes and secure
them against slipping.
4x
The slings must be attached so that the device
cannot tilt!
3. Lift the unit with the crane and place it on the
base.
4. Make sure that the unit's base frame is in full con-
tact with the base.
Transport with a pallet truck
►Transport the device to the installation site whilst
still packaged.
Unpacking
1. Remove plastic lms. Ensure that you do not
damage the device.
2. Dispose of the transport and packaging material
in an environmentally friendly way and in
accordance with local regulations.
5.4 Installation
Installation site requirements
Perform installation outdoors only.
Clearance dimensions are met
“Installation plans", from page 24
Free air intake and blowing air are possible with-
out any air short-circuit.
The surface is suitable for installation of the unit:
●The foundation is level and horizontal
●The surface and the foundation have a
load-bearing capacity su󰀩cient for the unit’s
weight
Ground surface in the air outlet area of the heat
pump is permeable to water
NOTE
The unit must be placed in a position where
no masses of water, snow or ice can fall onto
the unit from building roofs and/or via blocked
gutter.
NOTE
The noise immissions of the heat pumps must
be taken into account in the respective installa-
tion plans for air/water heat pumps. The respec-
tive regional regulations must be complied with.

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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 .
NOTE
Install the unit so that the switch box side is
accessible at all times.
1. Position the unit according to the installation
plans and place it onto the 4 anti-slip mats.
 “Installation plans", from page 24
4 x
IMPORTANT
In the delivery state, two water protection barriers
together with mounting material are deposited in the
unit. These must be removed from inside the unit and
mounted on the unit roof.
2. Remove the facing panels of the unit on the hy-
draulic connection side.
3. Carefully lift the water protection barriers out of
the interior of the unit. Do not damage any com-
ponents when lifting out.
4. Reattach the facing panels of the unit to the hy-
draulic connection side.
IMPORTANT
Use a stepladder for the following assembly steps. Do
not place a ladder against the unit. Do not climb on the
unit.
5. Tighten all nuts (①) of the total of 16 fastening
screws on the two ventilator ring plates (②) on the
top of the unit (③).
Tightening torque: 3 Nm.
3 Nm
6. Place the water protection barriers onto the venti-
lator ring plates. When doing so, guide the screw
threads protruding from the ventilator ring plates
through the fastening holes of the water protec-
tion barriers.

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After correct placement on the ventilator ring
plates (②), 8 screw threads (⑤) protrude from
each water protection barrier (④).
8 x
7. Use the mounting material from the accessory
pack to screw down the water protection barriers:
●16x PE foam washer (⑥)
●16x metal washer (⑦)
●16x nut M5 (⑧)
16 x
7.1. First put a PE foam washer (⑥) over a screw
thread.
7. 2 . Place a metal washer (⑦) over this PE foam
washer.
7.3 . Place a nut (⑧) on the screw thread and screw it
ononlylightlyatrst.
8. Finally tighten all 16 nuts. Tightening torque:
4,5 Nm.
4,5 Nm
6 Hydraulic installation
IMPORTANT
Components and lines for desuperheating must be
able to withstand temperatures up to 90°C.
IMPORTANT
Dirt and deposits in the (existing) hydraulic system can
cause damage to the heat pump.
►Ensure that a sludge separator is installed in the
hydraulic system.
►Rinse the hydraulic system thoroughly prior to es-
tablishing the hydraulic connection of the heat
pump.
1. Install the outside pipes of the heating circuit be-
neath the frost line.
2. Insert the vent at the highest point of the heating
circuit.
3. Integrate the unit as shown in the hydraulic dia-
gram for the respective unit model.
 “Hydraulic integrations", from page 30
The hydraulic system must be equipped with a
bu󰀨ertank,therequiredvolumeofwhichdepends
on your unit model:
"Technical data / scope of supply" overview,
"Heating circuit" section, Page 19
Cross-sections and lengths of the pipes for the
heating circuit are adequately dimensioned. The
connection line between the heat pump and the
building must also be taken into account.
Dimension the recirculating pump and piping
system such that the required throughput can be
achieved ( “Technical data / scope of supply",
page 19).
Recirculating pumps must be designed to run at a
xedspeed .

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4. Connecttheunittothexedpipingoftheheating
circuit via vibration decouplers. You must install
them to prevent the transfer of structurally borne
soundtothexedpiping(accessory).
1 Desuperheating return
2 Desuperheating supply
3 Heating circuit return
4 Heatingcircuitsupplyow
Hydraulic connection is possible from below or at the
side.
►Secure all connections to prevent twisting.
6.1 Vertical connection
View from below: View from inside:
1 Desuperheating connections
2 Heating circuit connections
3 Styrodur cover
1. Unscrew and remove the Styrodur cover and
then cut out the holes for the 4 pipes and the
condensate drain.
2. Trim the 4 hoses (accessories) to length if
required. Likewise the condensate hose inside the
unit, which hangs loose from the condensate pan.
3. Attach the hoses and feed down through the
holes. The condensation hose too.
1 Desuperheating return
2 Desuperheating supply
3 Heating circuit return
4 Heatingcircuitsupplyow
5 Condensation hose

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6.2 Horizonzal connection
1. Open break-outs on the right sidewall
2. Trim the 4 hoses (accessories) to length if
required. Likewise the condensate hose inside the
unit, which hangs loose from the condensate pan.
3. Attach the hoses and the condensation hose and
lead out on the right side.
1 Desuperheating return
2 Desuperheating supply
3 Heating circuit return
4 Heatingcircuitsupplyow
5 Condensation hose
6.3 Condensate drain
The condensate precipitated from the air must
be removed frost-free via a condensate pipe with
minimum 40 mm diameter. If surfaces are water
permeable, it is su󰀩ciency for the condensate water
pipe to be laid vertically in the ground to a depth of at
least 90 cm. If the condensate is discharged into the
sewer system, ensure frost-free laying with a gradient.
Discharge of the condensate into the sewers is
permitted only via a funnel waste trap, which must be
accessible at all times.
Observe local regulations!
7 Electrical installation
7.1 Connect the electrical cables
IMPORTANT
Irreparable damage to the compressor due to wrong
rotatingeld!
► Ensurethatthereisaclockwiserotatingeldfor
the compressor load infeed.
Basic information about the electrical
connection
● The specications of the local energy supply
companies may apply to electrical connections
●Fit the power supply for the heat pump with an
all-pole circuit breaker with at least 3 mm contact
spacing (acc. to IEC 60947-2)
●Note the level of the tripping current
( “Technical data / scope of supply",
page 19)
●Comply with the electromagnetic compatibility
regulations (EMC regulations)
●Lay unshielded power supply cables and shielded
cables(buscable)su󰀩cientlyfarapart(>100mm)
●Maximum line length: 30m.
Permissible type of bus cable:
3 x 0,5 mm², Standard shielded Ölex
Pull in the cables and conductors and create
the connections
1. Strip the sheathing of all cables to the external loads
before laying in the cable gland of the switch box.
2. Open electrical switch box.
3. Feed the control/sensor cables and unit supply
cable into the housing.
4. Connect cables to the respective terminals (
“Terminal diagrams", from page 33).

14 Subject to change without notice | 83059700jUK | ait-deutschland GmbH
1 Feed-through glands
2 Soft starter
3 Cable glands
4 3 motor protection switches
5 Bus distributor
6 Connection terminal
7 Main board
8 Control cabinet fan
5. Lay the power cable in a cable conduit up to the
cable entry into the building and from there con-
tinue to lay it up to the fuse box.
1 Cable gland for mains connection and BUS
lines
6. Connect the power cable to the power supply.
7. Seal empty pipes on the unit side.
8. Screw the facing panels onto the heat pump.
8 Flushing,llingandventing
8.1 Heating water quality
NOTE
●For detailed information refer, among
other things, to the VDI Guidelines
2035 “Vermeidung von Schäden in
Warmwasserheizanlagen” (preventing
damage in hot water heating systems)
●Required pH value: 8.2 … 10;
for aluminium materials:
pH value: 8.2 … 8.5
►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
● IdealpHvalueduetoself-alkalisationafterlling
the system
►If the required water quality is not achieved, con-
sult a company specialising in the treatment of
heating water.
►Keep a system log for hot water heating systems
in which relevant planning data is entered (VDI
2035).
Antifreeze in the heating circuit
For air/water heat pumps installed outdoors, it is not
necessary to ll a water/antifreeze mixture into the
heating circuit.
The heat pumps have safety devices that prevent
the water from freezing, even when the heating is
switchedo󰀨.Aprerequisiteisthattheheatpumpre-
mains switched on and is not disconnected from the
mains. Should there be a risk of frost, the circulation
pumps are activated.
The following points must be observed if antifreeze is
added, depending on the concentration of the mixture:
●Heat output of the heat pump is reduced
●COP value becomes worse
●In the case of on-site circulating pumps, the deliv-
ery rate is reduced; in the case of integrated cir-
culatingpumps,thespeciedfreepressuredrops
●The compatibility of the material of the compo-
nents used with the antifreeze mixture must be
ensured

15
Subject to change without notice | 83059700jUK | ait-deutschland GmbH
8.2 Flushing,llingandventing
the heating circuit
Outlet pipe of the safety valve is connected.
►Ensure that the set pressure of the safety valve is
not exceeded.
NOTE
The venting programme on the controller
can also be used to support the ushing
and venting process. It is possible to control
individual recirculating pumps and also the
switchover valve via the venting programme.
1. Vent system at the respective highest point.
2. Vent heat pump on the condenser and on the
desuperheater if installed.
1 Desuperheater venting
2 Condenser venting
3 Condenser venting
4 Condenser emptying
9 Insulate hydraulic connections
Insulate hydraulic lines in accordance with local
regulations.
1. Openshut-o󰀨devices.
2. Perform a pressure test and check for leaks.
3. Insulate external piping on site.
4. Insulateallconnections,ttingsandpipes.
5. If the device is used for cooling below 18°C, the
insulationmustbevapourdi󰀨usion-tight.
6. If desuperheating is used on the device,
the insulation on the corresponding lines
and components must be able to withstand
temperatures up to 90°C.
7. Isolate the cones drain in a frost-proof manner
8. The unit must be completely closed on all sides to
ensure rodent protection.
10 Settheoverow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 overow
valve to the right to increase the
temperaturedi󰀨erence(thespread),turnit
to the left to reduce it.
System is running in heating mode (ideally in cold
condition).
1. In case of low heating curve: Set the system to
"Forced heating" ( operating manual of the
heating and heat pump controller).
2. Shuto󰀨valvestotheheatingcircuit.
3. Ensurethatthetotalowisroutedviatheoverow
valve.
4. Readoutthe owandreturn temperatureatthe
heating and heat pump controller ( operating
manual of the heating and heat pump controller).

16 Subject to change without notice | 83059700jUK | ait-deutschland GmbH
5. Turn the adjusting knob (①)oftheoverowvalve
(②)untilthespreadbetweentheowandreturn
temperature is set as follows:
Outdoor
temperature
Recommended
setting
-10 °C 4 K
0 °C 5 K
10 °C 8 K
20 °C 9 K
30 °C 10 K
1 Rotary-push button
2 Overowvalve
6. Open valves to heating circuit.
7. Reset the heating and heat pump controller.
11 Commissioning
CAUTION
Prior to commissioning the unit, the fan
protection grilles must be mounted and
the facing panels closed.
Relevant planning & design data of the system is
documented in full.
Thecompetentenergysupplierhasbeennotied
of the operation of the heat pump system.
System is air-free.
Installation check using the rough checklist has
been completed successfully.
1. Ensure that the following points are fullled
completely
● Clockwiserotatingloadinfeedeldisavailableat
the compressor
●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ushedandvented
● Allshut-o󰀨devicesoftheheatingcircuitareopen
●The pipe systems and components of the sys-
tem are leak-tight.
2. Fill out carefully and sign the notice of completion
for heat pump systems.
3. In Germany:
Send notice of completion for heat pump systems
and rough checklist to the manufacturer’s factory
customer service department.
In other countries:
Send notice of completion for heat pump systems
and rough checklist to the manufacturer’s local
partner.
4. Arrange for the heat pump system to be
commissioned by after sales service personnel
authorised by the manufacturer; this is a
chargeable service.

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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 refrigerant circuit of the heat pump requires no
regular maintenance.
Local regulations– e.g. EU Regulation (EC) 517/2014 –
include a requirement for leakage controls beforehand
and/or for a log book to be kept for certain heat pumps.
►Ensure compliance with local regulations with
regardtothespecicheatpumpsystem.
12.2 Maintenance as required
●Checking and cleaning the components of the
heating circuit, e.g. valves, expansion vessels,
recirculatingpumps,lters,dirttraps
●Test the function of the safety valve for the heating
circuit
●Always regularly control for unimpeded air infeed
and outfeed accordingly. Constrictions or even
blockages which, for example occur
●when applying house insulation with polysty-
rene balls
●through packaging material (foils, lms, car-
tons etc.)
●through foliage, snow, icing or similar weath-
er-related deposits
●through vegetation (bushes, tall grass etc.)
● throughairshaftcovers(yprotectionscreens
etc.)
and which must be prevented and/or removed im-
mediately
●Check at regular intervals whether the evaporator
and the leaf guard need to be cleaned
1 Evaporator (left, right)
2 Leaf guard
1. Unscrew both top sidewalls for best possible
access.
2. If necessary remove leaves and contaminants.
3. Reattach sidewalls.
●Check regularly to ensure that the condensate
can drain out of the unit freely, without obstruction.
To this end, check the condensate pan in the unit
and the evaporator regularly for dirt / blockages
and clean as necessary
NOTE
Icing on air infeed and outfeed openings is
weather-related and normal. Do not remove
icing thermally.
►Wear protective gloves and carefully re-
move the icing with your hands.
12.3 Cleanandushcondenser
1. Cleanandushthecondenserinaccordancewith
the manufacturer's instructions.
2. Afterushingthecondenserwithchemicalclean-
ingproduct:Neutraliseanyresiduesandushthe
condenser thoroughly with water.
12.4 Yearly maintenance
►Record the quality of the heating water analytically.
Incaseofdeviationsfromthespecications,take
suitable measures without delay.

18 Subject to change without notice | 83059700jUK | ait-deutschland GmbH
13 Faults
1. Read out the cause of the fault via the diagnos-
tics program of the heating and heat pump con-
troller.
2. Contact the local partner of the manufacturer or
the factory's customer service. Have the fault
message and unit number to hand.
14 Dismantling and disposal
14.1 Dismantling
►Collect all media safely.
►Separate components by their materials.
14.2 Disposal and recycling
►Dispose of environmentally hazardous media
in accordance with local regulations (e. g.
refrigerant, compressor oil)
►Recycle or ensure proper disposal of device
components and packaging materials in
accordance with local regulations.

19
Subject to change without notice | 83059700jUK | ait-deutschland GmbH
Performance data Values in brackets: (1 Compressor) LWP450AR3
Heating capacity | COP for A7/W35 acc. to DIN EN 14511-x: 2018 kW | COP 47.8 (31.03) | 3.57 (4.58)
for A7/W45 acc. to DIN EN 14511-x: 2018 kW | COP — (39.56) | — (3.42)
for A2/W35 acc. to DIN EN 14511-x: 2018 kW | COP 45.5 (27.17) | 3.50 (3.83)
for A10/W35 acc. to DIN EN 14511-x: 2018
kW | COP — (33.38) | — (4.68)
for A-7/W35 acc. to DIN EN 14511-x: 2018 kW | COP 38.92 (23.5) | 2.95 (2.79)
for A-15/W65 acc. to DIN EN 14511-x: 2018 kW | COP — | —
for A-7/W55 acc. to DIN EN 14511-x: 2018 kW | COP 36.09 (—) | 2.09 (—)
Cooling capacity | EER for A35/W18 kW | EER 55.0(32.4) I 2.5 (3.05)
for A35/W7 kW | EER — (24.7) | — (2.56)
Operating limits
Heating circuit return min. | Heating circuit flow max. Heating within heat source min. I max. °C 20 | 60
Heating circuit return min. | Heating circuit flow max. Cooling within heat source min. I max. °C 10 (7) | 35
Heat source heating min. I max. °C -22 | 35
Heat source cooling min. I max. °C 10 | 40
Additional operating points …A-10/W65
Sound
Sound power level inside min. | Night | max. dB(A) — | — | —
Sound power level outside 1) min. | Night | max. dB(A) 63 | 63 | 72.4
Sound power level acc. to DIN EN 12102-1:2017 inside | outside dB(A) — | 63
Tonality | Low-frequency dB(A) | • yes – no — | — | —
Heat source
Air flow rate at maximum external pressing | Maximum external pressure m³/h | Pa 15000 (9000) | —
Heating circuit
Flow rate (pipe dimensioning) I Min. volume buffer tank in series I Min. volume separation buffer tank l/h | l | l 5500 | — | —
Free pressing | Pressure loss | Flow rate bar | bar | l/h 1.048 | 0.033 | 5500
Max. allowable operating pressure bar 6
Circulation pump control range min. I max. l/h —
Hot gas use
Flow rate (pipe dimensioning) l/h 2000
Free pressing | Pressure loss | Flow rate bar | bar | l/h — | 0.952 (0.045) | 2000
General unit data
Total weight kg 680
Weight of individual components kg | kg | kg — | — | —
Refrigerant type | Refrigerant capacity … | kg R410a | 23.0
Electrics
Voltage code | all-pole fuse protection for heat pump *)**) … | A 3~/PE/400V/50Hz | C50
Voltage code | all-pole fuse protection for heat pump *) + electric heating element **) … | A —
Voltage code | Control voltage fuse protection **) … | A 1~N/PE/230V/50Hz | B16
Voltage code | Electric heating element fuse protection **) … | A —
WP*): effect. Power consumption A7/W35 DIN EN 14511-x: 2018 I Electric consumption I cosφ kW | A | … 13.7(7.0) | 27.2(13.9) | 0.73(0.73)
WP*): Max. machine current I Max. power consumption within the operating limits A | kW 45.3 | —
Starting current: direct | with soft starter A | A < 142 | 85
Degree of protection IP 14B
Electric heating element output 3 | 2 | 1 phase kW | kW | kW — | — | —
Circulation pump power consumption, heating circuit min. I max. W— | 310
Other unit information
Safety valve heating circuit | Response pressure included in scope of supply: • yes – no | bar — | —
Buffer tank | Volume included in scope of supply: • yes – no | l — | —
Heating circuit expansion vessel | Volume | Prepressure incl. in scope of supply: • yes – no | l | bar — | — I —
Overflow valve | Changeover valve heating - domestic hot water integrated: • yes – no — | —
Heating circuit vibration decoupling incl. in scope of supply or integrated: • yes – no —
Controller I Heat quantity recording I Extension board incl. in scope of supply or integrated: • yes – no • | • | •
813576c
*) compressor only, **) note local regulations 1) Indoor and outdoor installation.
The performance data and the operating limits apply to clean heat exchangers l Index: h
Technical data / scope of supply

20 Subject to change without notice | 83059700jUK | ait-deutschland GmbH
maximale freie Pressung Wärmepumpe
Temp”
Verdichter
Volumenstrom Heizwasser
Temperatur Wärmequelle
Heizleistung
Leistungsaufnahme
Coefficient of performance / Leistungszahl
Temp„
Qh
Pe
COP
∆p1”
∆p2”
“”
Druckverlust Wärmepumpe
Legende: DE823129L/170408
823279c
VD
Rücklauf
Temperatur Heizwasser
Vorlauf
10
15
20
25
30
35
40
45
50
55
60
65
70
75
-22 -17 -12 -7 -2 3 8 13 18 23 28 33
Temp„ (°C)
Qh (kW)
35°C 1VD
55°C 1VD
35°C 2VD
55°C 2VD
1
2
3
4
5
6
-22 -17 -12 -7 -2 3 8 13 18 23 28 33
Temp„ (°C)
COP
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
-22 -17 -12 -7 -2 3 8 13 18 23 28 33
Temp„ (°C)
Pe (kW)
0,000
0,025
0,050
0,075
0,100
0,125
0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0
“” (m³/h)
∆p (bar)
∆p1”
15
20
25
30
35
40
45
50
55
60
65
70
-25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40
Temp„ (°C)
Temp” (C°)
0,000
0,150
0,300
0,450
0,600
0,750
0,900
1,050
1,200
1,350
1,500
0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0
“” (m³/h)
∆p (bar)
∆p2”
LWP 450AR3Performance curves / operating limits / heating
Keys UK823279cKeys UK823279c
“”“” Hot water volume ow rateHot water volume ow rate
TempTemp „„Heat source temperatureHeat source temperature
QhQh Heating capacityHeating capacity
PePe Power consumptionPower consumption
COPCOP Coefcient of performanceCoefcient of performance
∆p1∆p1 ””Pressure loss heat pumpPressure loss heat pump
∆p2∆p2 ””Maximum free pressure heat pumpMaximum free pressure heat pump
VDVD CompressorCompressor
TempTemp ””Hot water temperatureHot water temperature
FlowFlow
ReturnReturn