alphainnoTec LWC Series User manual

We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
Translation of the original
instruction manual
HEAT PUMPS
Operating Manual
Compact
AIR/WATER
UK
LWC Series

2We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
Please read rst
This operating manual provides important information
on handling the unit. It is an integral part of the product
and must be stored so that it is accessible in the
immediate vicinity of the unit. It must remain available
throughout the entire service life of the unit. It must be
handed over to subsequent owners or operators of the
unit.
Read the operating manual before working on or
operating the unit. This applies in particular to the
chapter on safety. Always follow all instructions
completely and without restrictions.
It is possible that this operating manual may contain
instructions that seem incomprehensible or unclear. In
case of questions or uncertainty, contact the factory
customer service department or the manufacturer’s
local service partner.
Since this operating manual was written for several
different models of the unit, always comply with the
parameters for the respective model.
This operating manual is intended only for persons
assigned to work on or operate the unit. Treat all
constituent parts condentially. The information
contained herein is protected by copyright. No part
of this information may be reproduced, transmitted,
copied, stored in electronic data systems or translated
into another language, either wholly or in part, without
the express written permission of the manufacturer.
Symbols
The following symbols are used in the operating manual.
They have the following meaning:
Information for operators.
Information or instructions for qualied
technicians.
DANGER!
Indicates a direct impending danger
resulting in severe injuries or death.
WARNING!
Indicates a possibly dangerous situation
that could result in severe injuries or
death.
CAUTION!
Indicates a possibly dangerous situation
that could result in medium or light
injuries.
ATTENTION.
Indicates a possibly dangerous situation, which
could result in property damage.
NOTICE.
Emphasized information.
€ENERGY SAVING TIP
Indicates suggestions that help to save energy,
raw materials and costs.
Reference to other sections of the operating
manual.
Reference to other documents of the
manufacturer.

3
Contents
INFORMATION FOR OPERATORS
AND QUALIFIED SPECIALISTS
PLEASE READ FIRST..................................................................2
SYMBOLS .....................................................................................2
INTENDED USE..........................................................................4
EXCLUSION OF LIABILITY......................................................4
EC CONFORMITY .....................................................................4
SAFETY.........................................................................................4
CUSTOMER SERVICE ................................................................5
Addresses in the event of a service call............................5
WARRANTY / GUARANTEE ...................................................5
DISPOSAL ....................................................................................5
INFORMATION FOR OPERATORS
FUNCTIONING PRINCIPLE
OF HEAT PUMP SYSTEM ....................................................6
AREA OF UTILIZATION...........................................................6
OPER ATIO N ................................................................................6
CARE OF THE UNIT..................................................................6
MAINTENANCE OF THE UNIT...............................................6
CLEANING THE EVAPORATOR ......................................7
Cleaning and rinsing of unit components..........................7
MALFUNCTIONS.......................................................................7
INSTRUCTIONS FOR
QUALIFIED TECHNICIANS
SCOPE OF DELIVERY ................................................................8
INSTALLATION ..........................................................................9
Installation area.....................................................................9
Transport to installation location......................................9
Sound ....................................................................................10
Installation............................................................................12
INSTALLATION OF THE
VENTILATION DUCT.......................................................13
Converting from air blower on the right to air blower
on the left ......................................................................13
The air duct system 700 (accessory)...............................15
Product advantages.............................................................16
Wall duct(s) assembly.........................................................16
Air ducts assembly..............................................................17
Securing the air duct into the wall duct..........................17
Securing the air duct on the heat pump..........................18
Screen frame assembly.......................................................18
Wire mesh grille and weather/rain guards assembly ....18
INSTALLATION / CONNECTION TO HEATING CIRCUIT
19
Manometer...........................................................................20
Discharge hot water safety valve and condensate
discharge ........................................................................20
HOT-WAT ER TANK .................................................................21
ELECTRICAL CONNECTIONS .............................................21
RINSING, FILLING AND BLEEDING THE SYSTEM ..........23
Water quality of the fill and additional water in hot
water heating systems .................................................23
INSULATING THE HYDRAULIC CONNECTIONS ..........27
OVERFLOW VALVE..................................................................27
Inspecting and setting up the overflow valve.................27
INSTALLATION OF THE CONTROL ELEMENT ...............28
INSTALLATION AND REMOVAL OF THE SCREEN .........29
COMMISSIONING ...................................................................30
Safety temperature limiter................................................31
DISMANTLING .........................................................................31
TECHNICAL DATA / SCOPE OF DELIVERY ........................32
PERFORMANCE CURVES
Heating capacity/COP / power consumption / Free
compression, heating circuit
LWC 60.................................................................................34
LWC 80.................................................................................35
LWC 10 0 ..............................................................................36
LWC 120...............................................................................37
DIMENSIONAL DRAWINGS .................................................38
INSTALLATION PLANS
Installation plan version 1 .................................................39
Installation plan version 2 ................................................ 40
Installation plan version 3 .................................................41
Installation plan version 4 .................................................42
Installation plan version 5 .................................................43
Installation plan version 6 ................................................ 44
TERMINAL DIAGRAM............................................................ 48
CIRCUIT DIAGRAMS
LWC 60 – LWC 80 .............................................................49
LWC 100 – LWC 120 .........................................................52
APPENDIX
EC DECLARATION OF CONFORMITY..............................55
We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH

4We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
Intended use
The unit may be used only for the intended purpose.
This means:
•for heating.
•for heating hot water.
The unit may be operated only within its technical
parameters.
Overview “Technical data / scope of delivery”.
NOTICE.
Notify the responsible power supply company of
the use of a heat pump or heat pump system.
Exclusion of liability
The manufacturer will not be liable for damage resulting
from unauthorized use of the unit.
The manufacturer’s liability will also be voided in the
following cases:
•if work is performed on the unit and its
components in a manner that does not comply
with the terms of this operating manual;
• if work is performed on the unit and its
components in an improper manner;
•if work is performed on the unit that is not
described in this operating manual, and this work
was not expressly approved in writing by the
manufacturer;
•if the unit or components in the unit are modied,
redesigned or removed without the express
written permission of the manufacturer.
EC conformity
The unit bears the CE mark of conformity.
EC declaration of conformity
Safety
The unit is operationally safe when used for the intended
purpose. The construction and design of the unit
conform to the state of the art, all relevant DIN/VDE
regulations and all relevant safety regulations.
Every person who performs work on the unit must
have read and understood the operating manual prior
to starting any work. This also applies if the respective
person has already worked with such a unit or a similar
unit or has been trained by the manufacturer.
Every person who performs work on the unit must
comply with the applicable accident prevention and
safety regulations. This applies in particular to the
wearing of personal safety gear.
DANGER!
Danger of fatal injury due to electric
current!
Electrical connections may be installed
only by qualied electricians.
Before opening the unit, disconnect the
system from the power supply and secure
it from being switched back on!
WARNING!
Only qualied technicians (trained heating,
cooling, refrigerant and electrical techni-
cians) may perform work on the unit and
its components.
WARNING!
Unit contains refrigerants!
Leaking refrigerant could result in
personal injury or material damage.
Therefore:
– Shut down unit.
– Notify the manufacturer’s authorized
service center.
ATTENTION
For safety reasons:
Never disconnect the unit from the power sup-
ply, unless the unit is being opened.

5
We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
ATTENTION
Install the heat pump only indoors and operate
only with outside air as the heat source. The air
ducts must discharge into the open air. Do not
restrict or block the air ducts.
Dimensional drawing and installation plan for
respective model.
WARNING!
Switch on unit only if air ducts are
mounted on the unit.
Take measures on the fan side to prevent
injuries from the rotating fan (above-
ground air duct discharge: below-ground
air-channel discharge: wire mesh grille
– accessories not included in scope of
delivery).
ATTENTION
The integration of the heat pump in ventila-
tion systems is not permissible. The use of the
cooled air for cooling purposes is not permitted.
ATTENTION
The ambient air in the location where the heat-
ing pump is installed and also the intake air which
is used as a source of heat must not contain any
kind of corrosive components!
Components such as ammonia, sulphur, chlo-
rine, salt, sewer gas, ue gases etc. may cause
damage leading to complete failure or even a to-
tal write-off of the heating pump!
CAUTION!
In the air outlet area the air temperature
is ca. 5 K below the ambient temperature.
Under certain climatic conditions,
therefore, an ice layer can form in the
air outlet area. Install the heat pump so
that the air blower does not blow in the
direction of footpaths.
Customer service
For technical assistance, please contact your qualied
technician or the manufacturer's local service partner.
ADDRESSES IN THE EVENT OF A SERVICE CALL
For a current list and additional partners of the
manufacturer, please visit:
DE: www.alpha-innotec.de
EU: www.alpha-innotec.eu
Warranty / Guarantee
For warranty and guarantee conditions, please refer to
the purchase documents.
NOTICE.
Please contact your dealer concerning warran-
ties and guarantees.
Disposal
When decommissioning the unit, always comply with
applicable laws, directives and standards for therecovery,
recycling and disposal of materials and components of
cooling units.
Dismantling.

6We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
Functioning principle
of heat pump system
Heat pumps operate on the principle of a refrigerator:
the same technology, only with the opposite effect. The
refrigerator extracts heat from foods, which is released
into the room through ns on the back.
The heat pump extracts heat from our environment:
air, earth or ground water. The extracted heat is
conditioned in the unit and supplied to the heating water.
Even when it is extremely cold outside, the heat pump
draws enough heat to heat a house.
Example: drawing of a brine/water heat pump with oor
heating:
4⁄4= usable energy
ca. 3⁄4= environmental energy
ca. 1⁄4= external electrical energy
Area of utilization
Taking into consideration the ambient conditions, limits
of application and the applicable regulations, every heat
pump can be utilized in new or existing heating systems.
Overview “Technical data / scope of delivery”.
Operation
Your decision to purchase a heat pump or a heat pump
system is a long-term contribution to protecting the
environment through low emissions and reduced primary
energy use.
You can operate and control the heat pump system
with the control element of the heating and heat pump
regulator.
NOTICE.
Make sure that the control settings are correct.
Operating manual of the heating and heat pump
regulator.
To ensure that your heat pump or heat pump system
operates efciently and ecologically, the following are
especially important:
€ENERGY SAVING TIP
Avoid unnecessarily high ow temperatures.
A lower ow temperature on the hot water side
increases the efciency of the system.
€ENERGY SAVING TIP
When letting in fresh air, do not leave windows
open for an extended period, thus saving energy
and reducing your heating costs.
Care of the unit
The outer surfaces of the unit can be cleaned with a
damp cloth and household cleaning products.
Do not use cleaning or care products that contain
abrasives, acids and/or chlorine. Such products would
destroy the surfaces and could also damage the technical
components of the unit.
Maintenance of the unit
According to EU regulation (EC) 517/2014, leak
inspections and maintenance of a log book are required
by law for certain heat pumps!
Log book for heat pumps, Section “Information
on use of the log book”.
The components of the heating circuit and the heat
source (valves, expansion vessels, circulating pumps,
lters, dirt traps) should be inspected as well as cleaned
as needed - at the very least annually - by a qualied
heating or cooling system technician.

7
We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
ATTENTION
Check regularly to ensure that the condensate
can drain out of the unit unobstructed. To this
end, regularly check the condensate pan in the
unit and the condensate drain to ensure that
they are clean / free from obstructions and clean
as needed.
It is a good idea to have a maintenance contract with
a specialist company. The company will conduct the
required maintenance at regular intervals.
CLEANING THE EVAPORATOR
Open the upper side panel, which is not connected
to the air duct.
In the bulkhead, underneath the fan, there are 2
covers. Remove the cover that is easier to reach:
Reach through the opening and clean the evapora-
tor behind it:
CAUTION!
Sharp-edged ns on evaporator:
- Cuts
- Wear protective gloves !
After cleaning fasten the cover and close the side
panel once more.
CLEANING AND RINSING OF UNIT COMPONENTS
CAUTION!
Unit components may be cleaned and
rinsed only by customer service personnel
authorized by the manufacturer. Use
only liquids recommended by the
manufacturer. Rinsing of the liqueer with
chemical cleaning agents must be followed
by neutralization of residue and intensive
rinsing with water. Always observe the
technical data of the manufacturer of the
heat exchanger.
Malfunctions
In the event of a malfunction, you can detect the cause of
the malfunction via the diagnostic program of the heating
and heat pump regulator.
Operating manual for the heating and heat pump
regulator.
CAUTION!
Service and repair work on the components
of the unit may be performed only by
customer service personnel authorized by
the manufacturer.
Overview “Customer service”.
Note that no malfunction is displayed if the safety
temperature limiter on the electric heating element has
been triggered (depending on model).
“Commissioning”, “Safety temperature limiter”
section.

8We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
Scope of delivery
Example of scope of delivery:
Compact unit with
• completely hermetically enclosed
compressor, all safety-related components
for monitoring of the cooling circuit
• electric switch cabinet with power
contactor and soft starter
• sensors mounted in the unit for
monitoring hot gas-, heating water forward
ow and return ow temperatures
• hose for condensate discharge
(connected to heat pump side)
• drainage hose for safety valve
(connected to heat pump side)
• Outdoor sensor
• Changeover valve domestic hot water
• with variant models that have
heat quanity recording:
with energy efcient circulating pumps,
heat quantity recording and Ventilation
circuit board (LWC60 and LWC80) or
Comfort board (LWC100 and LWC120)
For the scope of delivery, see Overview
“Technical data / scope of delivery”.
Proceed as follows:
Inspect delivery for outwardly visible signs of
damage.
Check to make sure that delivery is complete…
Any defects or incorrect deliveries must be claimed
immediately.
Overview “Technical data / scope of delivery”.
ACCESSORIES NECESSARY FOR OPERATION
ATTENTION
Use only original accessories from the manufac-
turer of the unit.
Air ducts (with air duct accessories) must be ordered
separately.
MAIN COMPONENTS:
1 fan
2 switch
3 compressor
4 expansion vessel:
5 condenser
6 electric heating element
7 evaporator

9
We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
Installation
Observe the following when performing work:
NOTICE.
Always comply with applicable accident pre-
vention regulations, statutory regulations, ordi-
nances and directives.
NOTICE.
Observe the sound levels of the respective
model.
Overview “Technical data / scope of delivery”,
“Sound” section.
INSTALLATION AREA
CAUTION.
Install the heat pump only indoors.
The installation room must be frost-free and dry.
WARNING!
Please note and follow the respective
relevant local standards, directives and
regulations applicable, especially the
minimum volume necessary depending
on the refrigerant capacity of the relevant
heat pump system (EN 378-1).
Refrigerant Limit
R 134a 0.25 kg/m³
R 404A 0.48 kg/m³
R 407C 0.31 kg/m³
R 410A 0.44 kg/m³
Overview “Technical data / scope of delivery”,
“General unit data” section.
Minimum volume = Refrigerant capacity [kg]
Limit [kg/m³]
NOTE.
If several heat pumps of the same type
are installed, only one heat pump must be
considered.
If several heat pumps of different types are
installed, the heat pump with the largest
refrigerant capacity must be considered.
TRANSPORT TO INSTALLATION LOCATION
Always comply with the following safety information
during transport:
WARNING!
Several people are required to transport
the unit. Do not underestimate the weight
of the unit.
Overview “Technical data / scope of delivery”,
“General unit data” section.
WARNING!
The unit can tip when being removed from
the wooden pallet and during transport.
This can result in personal injury and
damage to the unit.
– Take suitable precautionary measures
to eliminate the danger of tipping.
ATTENTION
Never use components and hydraulic connec-
tions on the unit for purposes of transport.
ATTENTION
Do not damage the hydraulic connections under
any circumstances.
ATTENTION
Do not tilt the unit more than a maximum of 45°
(in any direction).
To avoid damage during transport, you should transport
the unit to the nal installation location in its original
packaging (with packaging on the wooden pallet), using
a lifting truck.
If it is not possible to transport the unit to the nal
installation location using a lifting truck, you can also
transport the heat pump using a hand truck.

10 We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
SOUND
The noise emission from the heat pumps must be taken into account in the respective installation plans for air / water
heat pumps. The respective regional regulations must be complied with.
NOTE.
The following sound pressure levels are calculated values. Other constellations, adjoining other buildings or
even reecting surfaces may lead to a level increase. An exact specication of each sound pressure level is pos-
sible only through a measurement spot when the heat pump is already installed.
The following sound pressure levels result, depending on the distance and installation variant with directivity factor Q:
LWC 60
Distance from the heat pump in m
12345678910 11 12 13 14 15 16 17 18 19 20
Directiv-
ity factor Sound pressure level at max. heating output in dB(A)
Q
2- - - - - - - - - - - - - - - - - - - -
442 36 33 30 28 26 25 24 23 22 21 20 20 19 19 18 17 17 16 16
845 39 36 33 31 29 28 27 26 25 24 23 23 22 22 21 20 20 19 19
LWC 80
Distance from the heat pump in m
12345678910 11 12 13 14 15 16 17 18 19 20
Directiv-
ity factor Sound pressure level at max. heating output in dB(A)
Q
2- - - - - - - - - - - - - - - - - - - -
442 36 33 30 28 26 25 24 23 22 21 20 20 19 19 18 17 17 16 16
845 39 36 33 31 29 28 27 26 25 24 23 23 22 22 21 20 20 19 19
LWC 100
Distance from the heat pump in m
12345678910 11 12 13 14 15 16 17 18 19 20
Directiv-
ity factor Sound pressure level at max. heating output in dB(A)
Q
2- - - - - - - - - - - - - - - - - - - -
449 43 40 37 35 33 32 31 30 29 28 27 27 26 26 25 24 24 23 23
852 46 43 40 38 36 35 34 33 33 31 30 30 29 29 28 27 27 26 26
LWC 120
Distance from the heat pump in m
12345678910 11 12 13 14 15 16 17 18 19 20
Directiv-
ity factor Sound pressure level at max. heating output in dB(A)
Q
2- - - - - - - - - - - - - - - - - - - -
449 43 40 37 35 33 32 31 30 29 28 27 27 26 26 25 24 24 23 23
852 46 43 40 38 36 35 34 33 33 31 30 30 29 29 28 27 27 26 26

11
We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
The directivity factor Q for the different installation var-
iants.
Q = 4
Q = 8
In case of 2 or more units of the same heat pump type,
the respective level increase must be added to the cor-
responding sound pressure level from the following table
Number of n equally
loud sound sources
Level increase
∆Lin dB
10,0
23,0
34,8
46,0
57,0
67,8
78,5
89,0
99,5
10 10,0
12 10,8
In case of different, not equally loud units, the level in-
crease is read off the following diagram:
Level increase in dB
Level difference in dB
Example: If the level difference between two unequal
sound sources is 5 dB, the level increase is an addition-
al 1.2 dB.

12 We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
TRANSPORT WITH A HAND TRUCK
In order to reduce the weight of the unit for additional
transportation, we recommend using a hand truck to
remove the lower side walls and the lower front wall
prior to moving.
PRemove packaging and set extra box aside (will be
needed later on!)…
Lift unit from pallet.
Remove lower side panels and bottom front panel
of the unit…
•
To do so, loosen the quick-release screws. Turn
counter-clockwise 90°.
•
Lift side panels and set aside in a safe place…
Push hand truck under the unit (= rear side of unit).
Alpha InnoTec GmbH EPP-Isolationshülle 31.01.2008
ATTENTION
If the hand truck is pushed under the unit on the
back side of the unit, make sure not to damage
any connections during transport.
CAUTION.
Transport with a hand truck on the front side of
the unit is not permitted.
INSTALLATION
DANGER!
Several people are required to install the
unit.
ATTENTION
Do not tilt the unit more than a maximum of 45°
(in any direction).
NOTICE.
Always observe the installation plan for the re-
spective model. Note the size and minimum
clearances.
Installation plan for respective model.
Set up the unit so that the switch cabinet side
(=operating side) is accessible at all times.
Proceed as follows:
If you have not already done so, remove angle
bracket, transport and packaging material from the
unit. Set the extra box to the side and lift the unit
from the wooden pallet…
“Transport with a hand truck”.
Dispose of angle bracket, transport and packaging
material properly and in accordance with ecological
principles…
Set unit on a stable, solid and level, preferably sound-
insulated surface. Make sure that the foundation is
designed for the weight of the heat pump…

13
We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
Installation of the
ventilation duct
CONVERTING FROM AIR BLOWER ON THE RIGHT TO
AIR BLOWER ON THE LEFT
NOTICE.
Note the air blow-out direction of the
unit.
– By default, the units ship with the air
blower on the right hand side.
Remove top front panel and set it aside on the oor.
While doing so, rotate the front panel by 180° to
protect the capillary…
“Manometer”.
ATTENTION
Pay attention to the manometer capillary.
Remove the side panel on the top left and right by
unscrewing the 2 screws on each side…
Overview “Technical data/scope of delivery”,
“General unit data” section.
Mount feet…
ATTENTION
Moving the unit without the feet mounted can
damage the oor.
•
Tip the unit slowly and carefully to one side…
Secure unit in raised position so that it cannot
accidentally tip back into the original position.
CAUTION!
Hands and ngers could be crushed during
the following tasks!
•
Mount one foot each on the front and back of the
unit…
1 Foot
2 Lock nut
3 Adjusting screw
•
Slowly and carefully tip the unit back into the
original position…
•
Repeat procedure on the other side of the unit.
Place unit at nal installation location.
Compensate for minor unevenness using the four
adjusting screws and align the unit horizontally.
Then tighten the lock nuts.

14 We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
Slightly turn both side panels to the side and remove
the side panel by pushing it to the back…
Remove the sensor head from the bracket on the
left and let the wires dangle…
Pull out the insulation panels on the left and right
by pulling at the marked points (abrupt, jerky
movements facilitate the process)…
Proceed by carefully routing the sensor wire
through the insulation panel on the left…
Seal the hole you created using the dummy plug
included in the extra box…
NOTICE.
If necessary, you can xate the EPP insulation us-
ing a hot-melt glue gun or solvent-free adhesive.
The sensor must always be installed on the side
facing away from the duct.
Flip over the two components on the right and
arrange them on the left, while ipping over the two
components on the left and arranging them on the
right. Slide the sensor including the wire through
the pre-punched hole on the right after punching
through the hole with a screwdriver…
Clamp the sensor head into the bracket on the
right…
Route the sensor wire to the switch cab-
inet across the two cable brackets and the trans-
verse rail with the mounting holes…

15
We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
Proceed in reverse order when installing the
insulation panels and the top side panels. While
doing so, always attach the insulation panel at
the bottom rst before using your open hand to
gradually press or pound the panel into place from
the bottom to the top. To facilitate the process,
you can spray on a thin lm of soapy water for
lubrication…
ATTENTION
The lugs on the insulation panels must snap into
place in the designated areas.
Lug:
Snap-in area at the bottom
Snap-in area at the top
THE AIR DUCT SYSTEM 700 (ACCESSORY)
The air duct system 700 is a complete kit solution for
routing the air ow from the heat pump to the outside
of the house
The kit includes:
1 the wall duct
2 air ducts
3 unit connection (set)
4 weather grille and rain guard
5 screen frames
Example drawing of a mounted air duct system:
The air ducts and the wall duct are manufactured from
sturdy materials. The air ducts and the wall duct are
comprised of multiple parts and are interlocking. They
will be delivered in a at box and are constructed on-
site.
If necessary, they are available in lengths of 450 mm or
1000 mm as well as in angled elbow form.

16 We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
PRODUCT ADVANTAGES
•complete, optimised system (including wall duct)
•highly sound-absorbant
•light and, therefore, easy to transport
•easily interlocking and, therefore, easy to
assemble
•high-quality design
WALL DUCT(S) ASSEMBLY
Remove the parts necessary for the assembly of
the wall duct(s) from their respective boxes…
Next, interlock the 2 pieces of the wall duct(s)
that belong together, as illustrated in the following
drawing. Use the lubricant supplied upon delivery
to help in this process…
Afx an additional part as illustrated…
Rotate the already-interlocked parts 90° and afx
the nal piece at the bottom…
Rotate the already-interlocked parts by 90° once
again and set up the nal connection…
Stabilise the wall duct from the inside using the
chipboard included with delivery…
Insert the wall duct into the masonry. This can be
done during the structural construction phase (by
means of sealing)…
NOTICE.
Mount the wall ducts 1 cm above the nished
outer facade.
1 Masonry of the house exterior
2 Insert the wall duct in the
masonry (1 cm above the
nished outer facade)

17
We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
or retrot (using foam in the masonry):
1 Finished outer facade
NOTICE.
Wall ducts x wall openings, help avoid cold air
transmission in the masonry as well as assist in
the assembly of weather / rain guards and wire
mesh grilles
AIR DUCTS ASSEMBLY
Proceed as follows:
Remove the parts necessary for the assembly of the
air duct(s) from their respective boxes…
The interlocking of the air ducts is carried out
as described in the section – entitled “Wall
duct(s) assembly”.
SECURING THE AIR DUCT INTO THE WALL DUCT
Pull the roll seal included with delivery over the end
of the air duct…
Push this end of the air duct into the wall duct.
1 wall duct
2 air duct
3 roll seal
4 betonite waterstop tape (attach
only after assembling the
unit's connection fastener)
NOTICE.
After the other end of the air duct has been se-
cured to the heat pump, close the opening be-
tween the wall duct and the air duct using the
betonite waterstop tape included with delivery.

18 We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
SCREEN FRAME ASSEMBLY
Screw the screen frame to the wall ducts on both the air
intake and output sides.
NOTICE.
The screen frame serves no technical purpose; it
is present solely to create a seamless transition
to the wall duct.
WIRE MESH GRILLE AND WEATHER/RAIN GUARDS
ASSEMBLY
Proceed as follows:
Remove the wire mesh grille and the weather / rain
guards as well as the assembly frame and fastening
material from their respective boxes…
From the outside of the house inwards, insert the
assembly frame into the wall duct on the air intake
side and secure with screws…
8 x
SECURING THE AIR DUCT ON THE HEAT PUMP
Proceed as follows:
Clip on the assembly rail and secure it using special
screws to the spot on the air duct designated as the
air intake side…
Stick the adapter base included with delivery on the
edge of the air duct…
Position the air duct on the respective opening of
the air intake side…
Hook the tension springs included with delivery
into the holes provided for them on the air intake
side of heat pump 4…
Hook the tension springs into the assembly tail that
has been screwed on to the air duct…
Secure a protective cap over the assembly rail…
Repeat – the process on the air output side.
NOTICE.
Don't forget:
After the air ducts have been secured to the
heat pump, close the opening between the wall
duct and the air duct using the betonite water-
stop tape included with delivery.
NOTICE.
Secure the air ducts to the cover using appropri-
ate measures.

19
We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
Installation / connection to
heating circuit
ATTENTION
Connect the unit to the heating circuit accord-
ing to the hydraulic diagram for the respective
model.
“Hydraulic connection” instructions.
NOTICE.
Check to make sure that the diameters and
lengths of the pipes for the heating circuit are
sufciently dimensioned. The free compression
of the circulating pumps must be able to deliver
at least the minimum ow rate required for your
model.
Overview “Technical data / scope of delivery”,
“heating circuit” section.
ATTENTION
When installing the connections, always secure
the connections on the unit from twisting, in or-
der to prevent damage to the copper pipes in
the interior of the unit.
Rinse heating circuit thoroughly prior to connecting
the unit to the heating circuit…
NOTICE.
Contamination and deposits in the heating cir-
cuit can cause malfunctions.
Fit the hot water outow (forward ow), the hot
water circuit and the shared inow (return ow)
on the heat pump side with the included shut-off
devices and exible hoses…
NOTICE.
During installation of the shut-off devices, the
liqueer of the heat pump can be rinsed, if nec-
essary.
Position the wire mesh grille in the assembly
frame…
Set the weather / rain guards on the assembly frame
in the wall duct and screw down…
8 x
NOTICE.
If the wall duct is positioned above ground level,
attach the weather guard.
If the wall duct is positioned in a light well (be-
low ground level), attach the rain guard.
Repeat – the process on the air output side.

20 We reserve the right to modify technical specifications without prior notice.
83050400eUK © ait-deutschland GmbH
The connections for the heating circuit and the hot
water circuit (shared return ow) are located on
the back of the unit:
1 Connections heating circuit
and hot water circuit
Dimensional drawing for respective model.
Connect the unit to the pipes of the heating circuit
via vibration decouplers. They must be installed in
order to prevent damage from vibrations to the
pipes. Guide vibration decouplers in a quarter-circle.
NOTICE.
These are included in the scope of delivery.
MANOMETER
1 connection tting
If necessary, the manometer can be separated from the
heating circuit without the need to drain the heating
circuit. For this purpose, unscrew the connection tting
from the automatic shut-off valve.
ATTENTION
Do not bend the capillary tube of the manome-
ter!
NOTICE.
There may be water splashes when you screw
and screw the tting! Use a torque wrench to
tighten the connection tting - torque: 10 Nm.
DISCHARGE HOT WATER SAFETY VALVE AND
CONDENSATE DISCHARGE
The discharge of the heating water safety valve and the
condensation water from the air must be drained via the
pre-mounted hoses in the unit in accordance with the
applicable standards and regulations. Discharge of the
condensate and the safety valve into the sewage system
is permitted only via a funnel siphon, which must be
accessible at all times.
For positioning of the connection for condensate
discharge, see dimensional drawings for the
respective model.
1 Drainage hose from hot
water safety valve
2 Hose for condensate discharge
CAUTION!
Guide the pre-mounted hose in the unit
for condensate discharge in the interior of
the unit as a siphon.